/* Renesas M32C target-dependent code for GDB, the GNU debugger.
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/* Renesas M32C target-dependent code for GDB, the GNU debugger.
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Copyright 2004, 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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Copyright 2004, 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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This file is part of GDB.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "defs.h"
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#include <stdarg.h>
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#include <stdarg.h>
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#if defined (HAVE_STRING_H)
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#if defined (HAVE_STRING_H)
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#include <string.h>
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#include <string.h>
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#endif
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#endif
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#include "gdb_assert.h"
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#include "gdb_assert.h"
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#include "elf-bfd.h"
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#include "elf-bfd.h"
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#include "elf/m32c.h"
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#include "elf/m32c.h"
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#include "gdb/sim-m32c.h"
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#include "gdb/sim-m32c.h"
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#include "dis-asm.h"
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#include "dis-asm.h"
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#include "gdbtypes.h"
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#include "gdbtypes.h"
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#include "regcache.h"
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#include "regcache.h"
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#include "arch-utils.h"
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#include "arch-utils.h"
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#include "frame.h"
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#include "frame.h"
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#include "frame-unwind.h"
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#include "frame-unwind.h"
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#include "dwarf2-frame.h"
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#include "dwarf2-frame.h"
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#include "dwarf2expr.h"
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#include "dwarf2expr.h"
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#include "symtab.h"
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#include "symtab.h"
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#include "gdbcore.h"
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#include "gdbcore.h"
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#include "value.h"
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#include "value.h"
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#include "reggroups.h"
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#include "reggroups.h"
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#include "prologue-value.h"
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#include "prologue-value.h"
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#include "target.h"
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#include "target.h"
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/* The m32c tdep structure. */
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/* The m32c tdep structure. */
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static struct reggroup *m32c_dma_reggroup;
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static struct reggroup *m32c_dma_reggroup;
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struct m32c_reg;
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struct m32c_reg;
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/* The type of a function that moves the value of REG between CACHE or
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/* The type of a function that moves the value of REG between CACHE or
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BUF --- in either direction. */
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BUF --- in either direction. */
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typedef void (m32c_move_reg_t) (struct m32c_reg *reg,
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typedef void (m32c_move_reg_t) (struct m32c_reg *reg,
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struct regcache *cache,
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struct regcache *cache,
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void *buf);
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void *buf);
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struct m32c_reg
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struct m32c_reg
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{
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{
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/* The name of this register. */
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/* The name of this register. */
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const char *name;
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const char *name;
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/* Its type. */
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/* Its type. */
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struct type *type;
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struct type *type;
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/* The architecture this register belongs to. */
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/* The architecture this register belongs to. */
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struct gdbarch *arch;
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struct gdbarch *arch;
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/* Its GDB register number. */
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/* Its GDB register number. */
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int num;
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int num;
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/* Its sim register number. */
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/* Its sim register number. */
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int sim_num;
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int sim_num;
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/* Its DWARF register number, or -1 if it doesn't have one. */
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/* Its DWARF register number, or -1 if it doesn't have one. */
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int dwarf_num;
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int dwarf_num;
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/* Register group memberships. */
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/* Register group memberships. */
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unsigned int general_p : 1;
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unsigned int general_p : 1;
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unsigned int dma_p : 1;
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unsigned int dma_p : 1;
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unsigned int system_p : 1;
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unsigned int system_p : 1;
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unsigned int save_restore_p : 1;
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unsigned int save_restore_p : 1;
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/* Functions to read its value from a regcache, and write its value
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/* Functions to read its value from a regcache, and write its value
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to a regcache. */
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to a regcache. */
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m32c_move_reg_t *read, *write;
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m32c_move_reg_t *read, *write;
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/* Data for READ and WRITE functions. The exact meaning depends on
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/* Data for READ and WRITE functions. The exact meaning depends on
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the specific functions selected; see the comments for those
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the specific functions selected; see the comments for those
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functions. */
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functions. */
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struct m32c_reg *rx, *ry;
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struct m32c_reg *rx, *ry;
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int n;
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int n;
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};
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};
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/* An overestimate of the number of raw and pseudoregisters we will
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/* An overestimate of the number of raw and pseudoregisters we will
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have. The exact answer depends on the variant of the architecture
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have. The exact answer depends on the variant of the architecture
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at hand, but we can use this to declare statically allocated
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at hand, but we can use this to declare statically allocated
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arrays, and bump it up when needed. */
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arrays, and bump it up when needed. */
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#define M32C_MAX_NUM_REGS (75)
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#define M32C_MAX_NUM_REGS (75)
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/* The largest assigned DWARF register number. */
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/* The largest assigned DWARF register number. */
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#define M32C_MAX_DWARF_REGNUM (40)
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#define M32C_MAX_DWARF_REGNUM (40)
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struct gdbarch_tdep
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struct gdbarch_tdep
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{
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{
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/* All the registers for this variant, indexed by GDB register
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/* All the registers for this variant, indexed by GDB register
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number, and the number of registers present. */
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number, and the number of registers present. */
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struct m32c_reg regs[M32C_MAX_NUM_REGS];
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struct m32c_reg regs[M32C_MAX_NUM_REGS];
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/* The number of valid registers. */
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/* The number of valid registers. */
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int num_regs;
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int num_regs;
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/* Interesting registers. These are pointers into REGS. */
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/* Interesting registers. These are pointers into REGS. */
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struct m32c_reg *pc, *flg;
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struct m32c_reg *pc, *flg;
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struct m32c_reg *r0, *r1, *r2, *r3, *a0, *a1;
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struct m32c_reg *r0, *r1, *r2, *r3, *a0, *a1;
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struct m32c_reg *r2r0, *r3r2r1r0, *r3r1r2r0;
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struct m32c_reg *r2r0, *r3r2r1r0, *r3r1r2r0;
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struct m32c_reg *sb, *fb, *sp;
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struct m32c_reg *sb, *fb, *sp;
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/* A table indexed by DWARF register numbers, pointing into
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/* A table indexed by DWARF register numbers, pointing into
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REGS. */
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REGS. */
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struct m32c_reg *dwarf_regs[M32C_MAX_DWARF_REGNUM + 1];
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struct m32c_reg *dwarf_regs[M32C_MAX_DWARF_REGNUM + 1];
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/* Types for this architecture. We can't use the builtin_type_foo
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/* Types for this architecture. We can't use the builtin_type_foo
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types, because they're not initialized when building a gdbarch
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types, because they're not initialized when building a gdbarch
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structure. */
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structure. */
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struct type *voyd, *ptr_voyd, *func_voyd;
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struct type *voyd, *ptr_voyd, *func_voyd;
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struct type *uint8, *uint16;
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struct type *uint8, *uint16;
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struct type *int8, *int16, *int32, *int64;
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struct type *int8, *int16, *int32, *int64;
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/* The types for data address and code address registers. */
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/* The types for data address and code address registers. */
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struct type *data_addr_reg_type, *code_addr_reg_type;
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struct type *data_addr_reg_type, *code_addr_reg_type;
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/* The number of bytes a return address pushed by a 'jsr' instruction
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/* The number of bytes a return address pushed by a 'jsr' instruction
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occupies on the stack. */
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occupies on the stack. */
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int ret_addr_bytes;
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int ret_addr_bytes;
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/* The number of bytes an address register occupies on the stack
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/* The number of bytes an address register occupies on the stack
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when saved by an 'enter' or 'pushm' instruction. */
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when saved by an 'enter' or 'pushm' instruction. */
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int push_addr_bytes;
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int push_addr_bytes;
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};
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};
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/* Types. */
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/* Types. */
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static void
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static void
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make_types (struct gdbarch *arch)
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make_types (struct gdbarch *arch)
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{
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
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struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
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unsigned long mach = gdbarch_bfd_arch_info (arch)->mach;
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unsigned long mach = gdbarch_bfd_arch_info (arch)->mach;
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int data_addr_reg_bits, code_addr_reg_bits;
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int data_addr_reg_bits, code_addr_reg_bits;
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char type_name[50];
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char type_name[50];
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#if 0
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#if 0
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/* This is used to clip CORE_ADDR values, so this value is
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/* This is used to clip CORE_ADDR values, so this value is
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appropriate both on the m32c, where pointers are 32 bits long,
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appropriate both on the m32c, where pointers are 32 bits long,
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and on the m16c, where pointers are sixteen bits long, but there
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and on the m16c, where pointers are sixteen bits long, but there
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may be code above the 64k boundary. */
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may be code above the 64k boundary. */
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set_gdbarch_addr_bit (arch, 24);
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set_gdbarch_addr_bit (arch, 24);
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#else
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#else
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/* GCC uses 32 bits for addrs in the dwarf info, even though
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/* GCC uses 32 bits for addrs in the dwarf info, even though
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only 16/24 bits are used. Setting addr_bit to 24 causes
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only 16/24 bits are used. Setting addr_bit to 24 causes
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errors in reading the dwarf addresses. */
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errors in reading the dwarf addresses. */
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set_gdbarch_addr_bit (arch, 32);
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set_gdbarch_addr_bit (arch, 32);
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#endif
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#endif
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set_gdbarch_int_bit (arch, 16);
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set_gdbarch_int_bit (arch, 16);
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switch (mach)
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switch (mach)
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{
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{
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case bfd_mach_m16c:
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case bfd_mach_m16c:
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data_addr_reg_bits = 16;
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data_addr_reg_bits = 16;
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code_addr_reg_bits = 24;
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code_addr_reg_bits = 24;
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set_gdbarch_ptr_bit (arch, 16);
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set_gdbarch_ptr_bit (arch, 16);
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tdep->ret_addr_bytes = 3;
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tdep->ret_addr_bytes = 3;
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tdep->push_addr_bytes = 2;
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tdep->push_addr_bytes = 2;
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break;
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break;
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case bfd_mach_m32c:
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case bfd_mach_m32c:
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data_addr_reg_bits = 24;
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data_addr_reg_bits = 24;
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code_addr_reg_bits = 24;
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code_addr_reg_bits = 24;
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set_gdbarch_ptr_bit (arch, 32);
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set_gdbarch_ptr_bit (arch, 32);
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tdep->ret_addr_bytes = 4;
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tdep->ret_addr_bytes = 4;
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tdep->push_addr_bytes = 4;
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tdep->push_addr_bytes = 4;
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break;
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break;
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default:
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default:
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gdb_assert (0);
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gdb_assert (0);
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}
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}
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/* The builtin_type_mumble variables are sometimes uninitialized when
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/* The builtin_type_mumble variables are sometimes uninitialized when
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this is called, so we avoid using them. */
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this is called, so we avoid using them. */
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tdep->voyd = arch_type (arch, TYPE_CODE_VOID, 1, "void");
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tdep->voyd = arch_type (arch, TYPE_CODE_VOID, 1, "void");
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tdep->ptr_voyd
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tdep->ptr_voyd
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= arch_type (arch, TYPE_CODE_PTR, gdbarch_ptr_bit (arch) / TARGET_CHAR_BIT,
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= arch_type (arch, TYPE_CODE_PTR, gdbarch_ptr_bit (arch) / TARGET_CHAR_BIT,
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NULL);
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NULL);
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TYPE_TARGET_TYPE (tdep->ptr_voyd) = tdep->voyd;
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TYPE_TARGET_TYPE (tdep->ptr_voyd) = tdep->voyd;
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TYPE_UNSIGNED (tdep->ptr_voyd) = 1;
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TYPE_UNSIGNED (tdep->ptr_voyd) = 1;
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tdep->func_voyd = lookup_function_type (tdep->voyd);
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tdep->func_voyd = lookup_function_type (tdep->voyd);
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sprintf (type_name, "%s_data_addr_t",
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sprintf (type_name, "%s_data_addr_t",
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gdbarch_bfd_arch_info (arch)->printable_name);
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gdbarch_bfd_arch_info (arch)->printable_name);
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tdep->data_addr_reg_type
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tdep->data_addr_reg_type
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= arch_type (arch, TYPE_CODE_PTR, data_addr_reg_bits / TARGET_CHAR_BIT,
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= arch_type (arch, TYPE_CODE_PTR, data_addr_reg_bits / TARGET_CHAR_BIT,
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xstrdup (type_name));
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xstrdup (type_name));
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TYPE_TARGET_TYPE (tdep->data_addr_reg_type) = tdep->voyd;
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TYPE_TARGET_TYPE (tdep->data_addr_reg_type) = tdep->voyd;
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TYPE_UNSIGNED (tdep->data_addr_reg_type) = 1;
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TYPE_UNSIGNED (tdep->data_addr_reg_type) = 1;
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sprintf (type_name, "%s_code_addr_t",
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sprintf (type_name, "%s_code_addr_t",
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gdbarch_bfd_arch_info (arch)->printable_name);
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gdbarch_bfd_arch_info (arch)->printable_name);
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tdep->code_addr_reg_type
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tdep->code_addr_reg_type
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= arch_type (arch, TYPE_CODE_PTR, code_addr_reg_bits / TARGET_CHAR_BIT,
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= arch_type (arch, TYPE_CODE_PTR, code_addr_reg_bits / TARGET_CHAR_BIT,
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xstrdup (type_name));
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xstrdup (type_name));
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TYPE_TARGET_TYPE (tdep->code_addr_reg_type) = tdep->func_voyd;
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TYPE_TARGET_TYPE (tdep->code_addr_reg_type) = tdep->func_voyd;
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TYPE_UNSIGNED (tdep->code_addr_reg_type) = 1;
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TYPE_UNSIGNED (tdep->code_addr_reg_type) = 1;
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tdep->uint8 = arch_integer_type (arch, 8, 1, "uint8_t");
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tdep->uint8 = arch_integer_type (arch, 8, 1, "uint8_t");
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tdep->uint16 = arch_integer_type (arch, 16, 1, "uint16_t");
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tdep->uint16 = arch_integer_type (arch, 16, 1, "uint16_t");
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tdep->int8 = arch_integer_type (arch, 8, 0, "int8_t");
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tdep->int8 = arch_integer_type (arch, 8, 0, "int8_t");
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tdep->int16 = arch_integer_type (arch, 16, 0, "int16_t");
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tdep->int16 = arch_integer_type (arch, 16, 0, "int16_t");
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tdep->int32 = arch_integer_type (arch, 32, 0, "int32_t");
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tdep->int32 = arch_integer_type (arch, 32, 0, "int32_t");
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tdep->int64 = arch_integer_type (arch, 64, 0, "int64_t");
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tdep->int64 = arch_integer_type (arch, 64, 0, "int64_t");
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}
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}
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/* Register set. */
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/* Register set. */
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static const char *
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static const char *
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m32c_register_name (struct gdbarch *gdbarch, int num)
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m32c_register_name (struct gdbarch *gdbarch, int num)
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{
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{
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return gdbarch_tdep (gdbarch)->regs[num].name;
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return gdbarch_tdep (gdbarch)->regs[num].name;
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}
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}
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static struct type *
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static struct type *
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m32c_register_type (struct gdbarch *arch, int reg_nr)
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m32c_register_type (struct gdbarch *arch, int reg_nr)
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{
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{
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return gdbarch_tdep (arch)->regs[reg_nr].type;
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return gdbarch_tdep (arch)->regs[reg_nr].type;
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}
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}
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static int
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static int
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m32c_register_sim_regno (struct gdbarch *gdbarch, int reg_nr)
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m32c_register_sim_regno (struct gdbarch *gdbarch, int reg_nr)
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{
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{
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return gdbarch_tdep (gdbarch)->regs[reg_nr].sim_num;
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return gdbarch_tdep (gdbarch)->regs[reg_nr].sim_num;
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}
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}
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static int
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static int
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m32c_debug_info_reg_to_regnum (struct gdbarch *gdbarch, int reg_nr)
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m32c_debug_info_reg_to_regnum (struct gdbarch *gdbarch, int reg_nr)
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{
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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if (0 <= reg_nr && reg_nr <= M32C_MAX_DWARF_REGNUM
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if (0 <= reg_nr && reg_nr <= M32C_MAX_DWARF_REGNUM
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&& tdep->dwarf_regs[reg_nr])
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&& tdep->dwarf_regs[reg_nr])
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return tdep->dwarf_regs[reg_nr]->num;
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return tdep->dwarf_regs[reg_nr]->num;
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else
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else
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/* The DWARF CFI code expects to see -1 for invalid register
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/* The DWARF CFI code expects to see -1 for invalid register
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numbers. */
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numbers. */
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return -1;
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return -1;
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}
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}
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static int
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static int
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m32c_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
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m32c_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
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struct reggroup *group)
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struct reggroup *group)
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{
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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struct m32c_reg *reg = &tdep->regs[regnum];
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struct m32c_reg *reg = &tdep->regs[regnum];
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/* The anonymous raw registers aren't in any groups. */
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/* The anonymous raw registers aren't in any groups. */
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if (! reg->name)
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if (! reg->name)
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return 0;
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return 0;
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if (group == all_reggroup)
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if (group == all_reggroup)
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return 1;
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return 1;
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if (group == general_reggroup
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if (group == general_reggroup
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&& reg->general_p)
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&& reg->general_p)
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return 1;
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return 1;
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if (group == m32c_dma_reggroup
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if (group == m32c_dma_reggroup
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&& reg->dma_p)
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&& reg->dma_p)
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return 1;
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return 1;
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if (group == system_reggroup
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if (group == system_reggroup
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&& reg->system_p)
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&& reg->system_p)
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return 1;
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return 1;
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/* Since the m32c DWARF register numbers refer to cooked registers, not
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/* Since the m32c DWARF register numbers refer to cooked registers, not
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raw registers, and frame_pop depends on the save and restore groups
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raw registers, and frame_pop depends on the save and restore groups
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containing registers the DWARF CFI will actually mention, our save
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containing registers the DWARF CFI will actually mention, our save
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and restore groups are cooked registers, not raw registers. (This is
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and restore groups are cooked registers, not raw registers. (This is
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why we can't use the default reggroup function.) */
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why we can't use the default reggroup function.) */
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if ((group == save_reggroup
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if ((group == save_reggroup
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|| group == restore_reggroup)
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|| group == restore_reggroup)
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&& reg->save_restore_p)
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&& reg->save_restore_p)
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return 1;
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return 1;
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return 0;
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return 0;
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}
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}
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/* Register move functions. We declare them here using
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/* Register move functions. We declare them here using
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m32c_move_reg_t to check the types. */
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m32c_move_reg_t to check the types. */
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static m32c_move_reg_t m32c_raw_read, m32c_raw_write;
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static m32c_move_reg_t m32c_raw_read, m32c_raw_write;
|
static m32c_move_reg_t m32c_banked_read, m32c_banked_write;
|
static m32c_move_reg_t m32c_banked_read, m32c_banked_write;
|
static m32c_move_reg_t m32c_sb_read, m32c_sb_write;
|
static m32c_move_reg_t m32c_sb_read, m32c_sb_write;
|
static m32c_move_reg_t m32c_part_read, m32c_part_write;
|
static m32c_move_reg_t m32c_part_read, m32c_part_write;
|
static m32c_move_reg_t m32c_cat_read, m32c_cat_write;
|
static m32c_move_reg_t m32c_cat_read, m32c_cat_write;
|
static m32c_move_reg_t m32c_r3r2r1r0_read, m32c_r3r2r1r0_write;
|
static m32c_move_reg_t m32c_r3r2r1r0_read, m32c_r3r2r1r0_write;
|
|
|
|
|
/* Copy the value of the raw register REG from CACHE to BUF. */
|
/* Copy the value of the raw register REG from CACHE to BUF. */
|
static void
|
static void
|
m32c_raw_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_raw_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
regcache_raw_read (cache, reg->num, buf);
|
regcache_raw_read (cache, reg->num, buf);
|
}
|
}
|
|
|
|
|
/* Copy the value of the raw register REG from BUF to CACHE. */
|
/* Copy the value of the raw register REG from BUF to CACHE. */
|
static void
|
static void
|
m32c_raw_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_raw_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
regcache_raw_write (cache, reg->num, (const void *) buf);
|
regcache_raw_write (cache, reg->num, (const void *) buf);
|
}
|
}
|
|
|
|
|
/* Return the value of the 'flg' register in CACHE. */
|
/* Return the value of the 'flg' register in CACHE. */
|
static int
|
static int
|
m32c_read_flg (struct regcache *cache)
|
m32c_read_flg (struct regcache *cache)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (cache));
|
struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (cache));
|
ULONGEST flg;
|
ULONGEST flg;
|
regcache_raw_read_unsigned (cache, tdep->flg->num, &flg);
|
regcache_raw_read_unsigned (cache, tdep->flg->num, &flg);
|
return flg & 0xffff;
|
return flg & 0xffff;
|
}
|
}
|
|
|
|
|
/* Evaluate the real register number of a banked register. */
|
/* Evaluate the real register number of a banked register. */
|
static struct m32c_reg *
|
static struct m32c_reg *
|
m32c_banked_register (struct m32c_reg *reg, struct regcache *cache)
|
m32c_banked_register (struct m32c_reg *reg, struct regcache *cache)
|
{
|
{
|
return ((m32c_read_flg (cache) & reg->n) ? reg->ry : reg->rx);
|
return ((m32c_read_flg (cache) & reg->n) ? reg->ry : reg->rx);
|
}
|
}
|
|
|
|
|
/* Move the value of a banked register from CACHE to BUF.
|
/* Move the value of a banked register from CACHE to BUF.
|
If the value of the 'flg' register in CACHE has any of the bits
|
If the value of the 'flg' register in CACHE has any of the bits
|
masked in REG->n set, then read REG->ry. Otherwise, read
|
masked in REG->n set, then read REG->ry. Otherwise, read
|
REG->rx. */
|
REG->rx. */
|
static void
|
static void
|
m32c_banked_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_banked_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
struct m32c_reg *bank_reg = m32c_banked_register (reg, cache);
|
struct m32c_reg *bank_reg = m32c_banked_register (reg, cache);
|
regcache_raw_read (cache, bank_reg->num, buf);
|
regcache_raw_read (cache, bank_reg->num, buf);
|
}
|
}
|
|
|
|
|
/* Move the value of a banked register from BUF to CACHE.
|
/* Move the value of a banked register from BUF to CACHE.
|
If the value of the 'flg' register in CACHE has any of the bits
|
If the value of the 'flg' register in CACHE has any of the bits
|
masked in REG->n set, then write REG->ry. Otherwise, write
|
masked in REG->n set, then write REG->ry. Otherwise, write
|
REG->rx. */
|
REG->rx. */
|
static void
|
static void
|
m32c_banked_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_banked_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
struct m32c_reg *bank_reg = m32c_banked_register (reg, cache);
|
struct m32c_reg *bank_reg = m32c_banked_register (reg, cache);
|
regcache_raw_write (cache, bank_reg->num, (const void *) buf);
|
regcache_raw_write (cache, bank_reg->num, (const void *) buf);
|
}
|
}
|
|
|
|
|
/* Move the value of SB from CACHE to BUF. On bfd_mach_m32c, SB is a
|
/* Move the value of SB from CACHE to BUF. On bfd_mach_m32c, SB is a
|
banked register; on bfd_mach_m16c, it's not. */
|
banked register; on bfd_mach_m16c, it's not. */
|
static void
|
static void
|
m32c_sb_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_sb_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
if (gdbarch_bfd_arch_info (reg->arch)->mach == bfd_mach_m16c)
|
if (gdbarch_bfd_arch_info (reg->arch)->mach == bfd_mach_m16c)
|
m32c_raw_read (reg->rx, cache, buf);
|
m32c_raw_read (reg->rx, cache, buf);
|
else
|
else
|
m32c_banked_read (reg, cache, buf);
|
m32c_banked_read (reg, cache, buf);
|
}
|
}
|
|
|
|
|
/* Move the value of SB from BUF to CACHE. On bfd_mach_m32c, SB is a
|
/* Move the value of SB from BUF to CACHE. On bfd_mach_m32c, SB is a
|
banked register; on bfd_mach_m16c, it's not. */
|
banked register; on bfd_mach_m16c, it's not. */
|
static void
|
static void
|
m32c_sb_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_sb_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
if (gdbarch_bfd_arch_info (reg->arch)->mach == bfd_mach_m16c)
|
if (gdbarch_bfd_arch_info (reg->arch)->mach == bfd_mach_m16c)
|
m32c_raw_write (reg->rx, cache, buf);
|
m32c_raw_write (reg->rx, cache, buf);
|
else
|
else
|
m32c_banked_write (reg, cache, buf);
|
m32c_banked_write (reg, cache, buf);
|
}
|
}
|
|
|
|
|
/* Assuming REG uses m32c_part_read and m32c_part_write, set *OFFSET_P
|
/* Assuming REG uses m32c_part_read and m32c_part_write, set *OFFSET_P
|
and *LEN_P to the offset and length, in bytes, of the part REG
|
and *LEN_P to the offset and length, in bytes, of the part REG
|
occupies in its underlying register. The offset is from the
|
occupies in its underlying register. The offset is from the
|
lower-addressed end, regardless of the architecture's endianness.
|
lower-addressed end, regardless of the architecture's endianness.
|
(The M32C family is always little-endian, but let's keep those
|
(The M32C family is always little-endian, but let's keep those
|
assumptions out of here.) */
|
assumptions out of here.) */
|
static void
|
static void
|
m32c_find_part (struct m32c_reg *reg, int *offset_p, int *len_p)
|
m32c_find_part (struct m32c_reg *reg, int *offset_p, int *len_p)
|
{
|
{
|
/* The length of the containing register, of which REG is one part. */
|
/* The length of the containing register, of which REG is one part. */
|
int containing_len = TYPE_LENGTH (reg->rx->type);
|
int containing_len = TYPE_LENGTH (reg->rx->type);
|
|
|
/* The length of one "element" in our imaginary array. */
|
/* The length of one "element" in our imaginary array. */
|
int elt_len = TYPE_LENGTH (reg->type);
|
int elt_len = TYPE_LENGTH (reg->type);
|
|
|
/* The offset of REG's "element" from the least significant end of
|
/* The offset of REG's "element" from the least significant end of
|
the containing register. */
|
the containing register. */
|
int elt_offset = reg->n * elt_len;
|
int elt_offset = reg->n * elt_len;
|
|
|
/* If we extend off the end, trim the length of the element. */
|
/* If we extend off the end, trim the length of the element. */
|
if (elt_offset + elt_len > containing_len)
|
if (elt_offset + elt_len > containing_len)
|
{
|
{
|
elt_len = containing_len - elt_offset;
|
elt_len = containing_len - elt_offset;
|
/* We shouldn't be declaring partial registers that go off the
|
/* We shouldn't be declaring partial registers that go off the
|
end of their containing registers. */
|
end of their containing registers. */
|
gdb_assert (elt_len > 0);
|
gdb_assert (elt_len > 0);
|
}
|
}
|
|
|
/* Flip the offset around if we're big-endian. */
|
/* Flip the offset around if we're big-endian. */
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
elt_offset = TYPE_LENGTH (reg->rx->type) - elt_offset - elt_len;
|
elt_offset = TYPE_LENGTH (reg->rx->type) - elt_offset - elt_len;
|
|
|
*offset_p = elt_offset;
|
*offset_p = elt_offset;
|
*len_p = elt_len;
|
*len_p = elt_len;
|
}
|
}
|
|
|
|
|
/* Move the value of a partial register (r0h, intbl, etc.) from CACHE
|
/* Move the value of a partial register (r0h, intbl, etc.) from CACHE
|
to BUF. Treating the value of the register REG->rx as an array of
|
to BUF. Treating the value of the register REG->rx as an array of
|
REG->type values, where higher indices refer to more significant
|
REG->type values, where higher indices refer to more significant
|
bits, read the value of the REG->n'th element. */
|
bits, read the value of the REG->n'th element. */
|
static void
|
static void
|
m32c_part_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_part_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
int offset, len;
|
int offset, len;
|
memset (buf, 0, TYPE_LENGTH (reg->type));
|
memset (buf, 0, TYPE_LENGTH (reg->type));
|
m32c_find_part (reg, &offset, &len);
|
m32c_find_part (reg, &offset, &len);
|
regcache_cooked_read_part (cache, reg->rx->num, offset, len, buf);
|
regcache_cooked_read_part (cache, reg->rx->num, offset, len, buf);
|
}
|
}
|
|
|
|
|
/* Move the value of a banked register from BUF to CACHE.
|
/* Move the value of a banked register from BUF to CACHE.
|
Treating the value of the register REG->rx as an array of REG->type
|
Treating the value of the register REG->rx as an array of REG->type
|
values, where higher indices refer to more significant bits, write
|
values, where higher indices refer to more significant bits, write
|
the value of the REG->n'th element. */
|
the value of the REG->n'th element. */
|
static void
|
static void
|
m32c_part_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_part_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
int offset, len;
|
int offset, len;
|
m32c_find_part (reg, &offset, &len);
|
m32c_find_part (reg, &offset, &len);
|
regcache_cooked_write_part (cache, reg->rx->num, offset, len, buf);
|
regcache_cooked_write_part (cache, reg->rx->num, offset, len, buf);
|
}
|
}
|
|
|
|
|
/* Move the value of REG from CACHE to BUF. REG's value is the
|
/* Move the value of REG from CACHE to BUF. REG's value is the
|
concatenation of the values of the registers REG->rx and REG->ry,
|
concatenation of the values of the registers REG->rx and REG->ry,
|
with REG->rx contributing the more significant bits. */
|
with REG->rx contributing the more significant bits. */
|
static void
|
static void
|
m32c_cat_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_cat_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
int high_bytes = TYPE_LENGTH (reg->rx->type);
|
int high_bytes = TYPE_LENGTH (reg->rx->type);
|
int low_bytes = TYPE_LENGTH (reg->ry->type);
|
int low_bytes = TYPE_LENGTH (reg->ry->type);
|
/* For address arithmetic. */
|
/* For address arithmetic. */
|
unsigned char *cbuf = buf;
|
unsigned char *cbuf = buf;
|
|
|
gdb_assert (TYPE_LENGTH (reg->type) == high_bytes + low_bytes);
|
gdb_assert (TYPE_LENGTH (reg->type) == high_bytes + low_bytes);
|
|
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
{
|
{
|
regcache_cooked_read (cache, reg->rx->num, cbuf);
|
regcache_cooked_read (cache, reg->rx->num, cbuf);
|
regcache_cooked_read (cache, reg->ry->num, cbuf + high_bytes);
|
regcache_cooked_read (cache, reg->ry->num, cbuf + high_bytes);
|
}
|
}
|
else
|
else
|
{
|
{
|
regcache_cooked_read (cache, reg->rx->num, cbuf + low_bytes);
|
regcache_cooked_read (cache, reg->rx->num, cbuf + low_bytes);
|
regcache_cooked_read (cache, reg->ry->num, cbuf);
|
regcache_cooked_read (cache, reg->ry->num, cbuf);
|
}
|
}
|
}
|
}
|
|
|
|
|
/* Move the value of REG from CACHE to BUF. REG's value is the
|
/* Move the value of REG from CACHE to BUF. REG's value is the
|
concatenation of the values of the registers REG->rx and REG->ry,
|
concatenation of the values of the registers REG->rx and REG->ry,
|
with REG->rx contributing the more significant bits. */
|
with REG->rx contributing the more significant bits. */
|
static void
|
static void
|
m32c_cat_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_cat_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
int high_bytes = TYPE_LENGTH (reg->rx->type);
|
int high_bytes = TYPE_LENGTH (reg->rx->type);
|
int low_bytes = TYPE_LENGTH (reg->ry->type);
|
int low_bytes = TYPE_LENGTH (reg->ry->type);
|
/* For address arithmetic. */
|
/* For address arithmetic. */
|
unsigned char *cbuf = buf;
|
unsigned char *cbuf = buf;
|
|
|
gdb_assert (TYPE_LENGTH (reg->type) == high_bytes + low_bytes);
|
gdb_assert (TYPE_LENGTH (reg->type) == high_bytes + low_bytes);
|
|
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
{
|
{
|
regcache_cooked_write (cache, reg->rx->num, cbuf);
|
regcache_cooked_write (cache, reg->rx->num, cbuf);
|
regcache_cooked_write (cache, reg->ry->num, cbuf + high_bytes);
|
regcache_cooked_write (cache, reg->ry->num, cbuf + high_bytes);
|
}
|
}
|
else
|
else
|
{
|
{
|
regcache_cooked_write (cache, reg->rx->num, cbuf + low_bytes);
|
regcache_cooked_write (cache, reg->rx->num, cbuf + low_bytes);
|
regcache_cooked_write (cache, reg->ry->num, cbuf);
|
regcache_cooked_write (cache, reg->ry->num, cbuf);
|
}
|
}
|
}
|
}
|
|
|
|
|
/* Copy the value of the raw register REG from CACHE to BUF. REG is
|
/* Copy the value of the raw register REG from CACHE to BUF. REG is
|
the concatenation (from most significant to least) of r3, r2, r1,
|
the concatenation (from most significant to least) of r3, r2, r1,
|
and r0. */
|
and r0. */
|
static void
|
static void
|
m32c_r3r2r1r0_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_r3r2r1r0_read (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (reg->arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (reg->arch);
|
int len = TYPE_LENGTH (tdep->r0->type);
|
int len = TYPE_LENGTH (tdep->r0->type);
|
|
|
/* For address arithmetic. */
|
/* For address arithmetic. */
|
unsigned char *cbuf = buf;
|
unsigned char *cbuf = buf;
|
|
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
{
|
{
|
regcache_cooked_read (cache, tdep->r0->num, cbuf + len * 3);
|
regcache_cooked_read (cache, tdep->r0->num, cbuf + len * 3);
|
regcache_cooked_read (cache, tdep->r1->num, cbuf + len * 2);
|
regcache_cooked_read (cache, tdep->r1->num, cbuf + len * 2);
|
regcache_cooked_read (cache, tdep->r2->num, cbuf + len * 1);
|
regcache_cooked_read (cache, tdep->r2->num, cbuf + len * 1);
|
regcache_cooked_read (cache, tdep->r3->num, cbuf);
|
regcache_cooked_read (cache, tdep->r3->num, cbuf);
|
}
|
}
|
else
|
else
|
{
|
{
|
regcache_cooked_read (cache, tdep->r0->num, cbuf);
|
regcache_cooked_read (cache, tdep->r0->num, cbuf);
|
regcache_cooked_read (cache, tdep->r1->num, cbuf + len * 1);
|
regcache_cooked_read (cache, tdep->r1->num, cbuf + len * 1);
|
regcache_cooked_read (cache, tdep->r2->num, cbuf + len * 2);
|
regcache_cooked_read (cache, tdep->r2->num, cbuf + len * 2);
|
regcache_cooked_read (cache, tdep->r3->num, cbuf + len * 3);
|
regcache_cooked_read (cache, tdep->r3->num, cbuf + len * 3);
|
}
|
}
|
}
|
}
|
|
|
|
|
/* Copy the value of the raw register REG from BUF to CACHE. REG is
|
/* Copy the value of the raw register REG from BUF to CACHE. REG is
|
the concatenation (from most significant to least) of r3, r2, r1,
|
the concatenation (from most significant to least) of r3, r2, r1,
|
and r0. */
|
and r0. */
|
static void
|
static void
|
m32c_r3r2r1r0_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
m32c_r3r2r1r0_write (struct m32c_reg *reg, struct regcache *cache, void *buf)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (reg->arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (reg->arch);
|
int len = TYPE_LENGTH (tdep->r0->type);
|
int len = TYPE_LENGTH (tdep->r0->type);
|
|
|
/* For address arithmetic. */
|
/* For address arithmetic. */
|
unsigned char *cbuf = buf;
|
unsigned char *cbuf = buf;
|
|
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
if (gdbarch_byte_order (reg->arch) == BFD_ENDIAN_BIG)
|
{
|
{
|
regcache_cooked_write (cache, tdep->r0->num, cbuf + len * 3);
|
regcache_cooked_write (cache, tdep->r0->num, cbuf + len * 3);
|
regcache_cooked_write (cache, tdep->r1->num, cbuf + len * 2);
|
regcache_cooked_write (cache, tdep->r1->num, cbuf + len * 2);
|
regcache_cooked_write (cache, tdep->r2->num, cbuf + len * 1);
|
regcache_cooked_write (cache, tdep->r2->num, cbuf + len * 1);
|
regcache_cooked_write (cache, tdep->r3->num, cbuf);
|
regcache_cooked_write (cache, tdep->r3->num, cbuf);
|
}
|
}
|
else
|
else
|
{
|
{
|
regcache_cooked_write (cache, tdep->r0->num, cbuf);
|
regcache_cooked_write (cache, tdep->r0->num, cbuf);
|
regcache_cooked_write (cache, tdep->r1->num, cbuf + len * 1);
|
regcache_cooked_write (cache, tdep->r1->num, cbuf + len * 1);
|
regcache_cooked_write (cache, tdep->r2->num, cbuf + len * 2);
|
regcache_cooked_write (cache, tdep->r2->num, cbuf + len * 2);
|
regcache_cooked_write (cache, tdep->r3->num, cbuf + len * 3);
|
regcache_cooked_write (cache, tdep->r3->num, cbuf + len * 3);
|
}
|
}
|
}
|
}
|
|
|
|
|
static void
|
static void
|
m32c_pseudo_register_read (struct gdbarch *arch,
|
m32c_pseudo_register_read (struct gdbarch *arch,
|
struct regcache *cache,
|
struct regcache *cache,
|
int cookednum,
|
int cookednum,
|
gdb_byte *buf)
|
gdb_byte *buf)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct m32c_reg *reg;
|
struct m32c_reg *reg;
|
|
|
gdb_assert (0 <= cookednum && cookednum < tdep->num_regs);
|
gdb_assert (0 <= cookednum && cookednum < tdep->num_regs);
|
gdb_assert (arch == get_regcache_arch (cache));
|
gdb_assert (arch == get_regcache_arch (cache));
|
gdb_assert (arch == tdep->regs[cookednum].arch);
|
gdb_assert (arch == tdep->regs[cookednum].arch);
|
reg = &tdep->regs[cookednum];
|
reg = &tdep->regs[cookednum];
|
|
|
reg->read (reg, cache, buf);
|
reg->read (reg, cache, buf);
|
}
|
}
|
|
|
|
|
static void
|
static void
|
m32c_pseudo_register_write (struct gdbarch *arch,
|
m32c_pseudo_register_write (struct gdbarch *arch,
|
struct regcache *cache,
|
struct regcache *cache,
|
int cookednum,
|
int cookednum,
|
const gdb_byte *buf)
|
const gdb_byte *buf)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct m32c_reg *reg;
|
struct m32c_reg *reg;
|
|
|
gdb_assert (0 <= cookednum && cookednum < tdep->num_regs);
|
gdb_assert (0 <= cookednum && cookednum < tdep->num_regs);
|
gdb_assert (arch == get_regcache_arch (cache));
|
gdb_assert (arch == get_regcache_arch (cache));
|
gdb_assert (arch == tdep->regs[cookednum].arch);
|
gdb_assert (arch == tdep->regs[cookednum].arch);
|
reg = &tdep->regs[cookednum];
|
reg = &tdep->regs[cookednum];
|
|
|
reg->write (reg, cache, (void *) buf);
|
reg->write (reg, cache, (void *) buf);
|
}
|
}
|
|
|
|
|
/* Add a register with the given fields to the end of ARCH's table.
|
/* Add a register with the given fields to the end of ARCH's table.
|
Return a pointer to the newly added register. */
|
Return a pointer to the newly added register. */
|
static struct m32c_reg *
|
static struct m32c_reg *
|
add_reg (struct gdbarch *arch,
|
add_reg (struct gdbarch *arch,
|
const char *name,
|
const char *name,
|
struct type *type,
|
struct type *type,
|
int sim_num,
|
int sim_num,
|
m32c_move_reg_t *read,
|
m32c_move_reg_t *read,
|
m32c_move_reg_t *write,
|
m32c_move_reg_t *write,
|
struct m32c_reg *rx,
|
struct m32c_reg *rx,
|
struct m32c_reg *ry,
|
struct m32c_reg *ry,
|
int n)
|
int n)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct m32c_reg *r = &tdep->regs[tdep->num_regs];
|
struct m32c_reg *r = &tdep->regs[tdep->num_regs];
|
|
|
gdb_assert (tdep->num_regs < M32C_MAX_NUM_REGS);
|
gdb_assert (tdep->num_regs < M32C_MAX_NUM_REGS);
|
|
|
r->name = name;
|
r->name = name;
|
r->type = type;
|
r->type = type;
|
r->arch = arch;
|
r->arch = arch;
|
r->num = tdep->num_regs;
|
r->num = tdep->num_regs;
|
r->sim_num = sim_num;
|
r->sim_num = sim_num;
|
r->dwarf_num = -1;
|
r->dwarf_num = -1;
|
r->general_p = 0;
|
r->general_p = 0;
|
r->dma_p = 0;
|
r->dma_p = 0;
|
r->system_p = 0;
|
r->system_p = 0;
|
r->save_restore_p = 0;
|
r->save_restore_p = 0;
|
r->read = read;
|
r->read = read;
|
r->write = write;
|
r->write = write;
|
r->rx = rx;
|
r->rx = rx;
|
r->ry = ry;
|
r->ry = ry;
|
r->n = n;
|
r->n = n;
|
|
|
tdep->num_regs++;
|
tdep->num_regs++;
|
|
|
return r;
|
return r;
|
}
|
}
|
|
|
|
|
/* Record NUM as REG's DWARF register number. */
|
/* Record NUM as REG's DWARF register number. */
|
static void
|
static void
|
set_dwarf_regnum (struct m32c_reg *reg, int num)
|
set_dwarf_regnum (struct m32c_reg *reg, int num)
|
{
|
{
|
gdb_assert (num < M32C_MAX_NUM_REGS);
|
gdb_assert (num < M32C_MAX_NUM_REGS);
|
|
|
/* Update the reg->DWARF mapping. Only count the first number
|
/* Update the reg->DWARF mapping. Only count the first number
|
assigned to this register. */
|
assigned to this register. */
|
if (reg->dwarf_num == -1)
|
if (reg->dwarf_num == -1)
|
reg->dwarf_num = num;
|
reg->dwarf_num = num;
|
|
|
/* Update the DWARF->reg mapping. */
|
/* Update the DWARF->reg mapping. */
|
gdbarch_tdep (reg->arch)->dwarf_regs[num] = reg;
|
gdbarch_tdep (reg->arch)->dwarf_regs[num] = reg;
|
}
|
}
|
|
|
|
|
/* Mark REG as a general-purpose register, and return it. */
|
/* Mark REG as a general-purpose register, and return it. */
|
static struct m32c_reg *
|
static struct m32c_reg *
|
mark_general (struct m32c_reg *reg)
|
mark_general (struct m32c_reg *reg)
|
{
|
{
|
reg->general_p = 1;
|
reg->general_p = 1;
|
return reg;
|
return reg;
|
}
|
}
|
|
|
|
|
/* Mark REG as a DMA register, and return it. */
|
/* Mark REG as a DMA register, and return it. */
|
static struct m32c_reg *
|
static struct m32c_reg *
|
mark_dma (struct m32c_reg *reg)
|
mark_dma (struct m32c_reg *reg)
|
{
|
{
|
reg->dma_p = 1;
|
reg->dma_p = 1;
|
return reg;
|
return reg;
|
}
|
}
|
|
|
|
|
/* Mark REG as a SYSTEM register, and return it. */
|
/* Mark REG as a SYSTEM register, and return it. */
|
static struct m32c_reg *
|
static struct m32c_reg *
|
mark_system (struct m32c_reg *reg)
|
mark_system (struct m32c_reg *reg)
|
{
|
{
|
reg->system_p = 1;
|
reg->system_p = 1;
|
return reg;
|
return reg;
|
}
|
}
|
|
|
|
|
/* Mark REG as a save-restore register, and return it. */
|
/* Mark REG as a save-restore register, and return it. */
|
static struct m32c_reg *
|
static struct m32c_reg *
|
mark_save_restore (struct m32c_reg *reg)
|
mark_save_restore (struct m32c_reg *reg)
|
{
|
{
|
reg->save_restore_p = 1;
|
reg->save_restore_p = 1;
|
return reg;
|
return reg;
|
}
|
}
|
|
|
|
|
#define FLAGBIT_B 0x0010
|
#define FLAGBIT_B 0x0010
|
#define FLAGBIT_U 0x0080
|
#define FLAGBIT_U 0x0080
|
|
|
/* Handy macros for declaring registers. These all evaluate to
|
/* Handy macros for declaring registers. These all evaluate to
|
pointers to the register declared. Macros that define two
|
pointers to the register declared. Macros that define two
|
registers evaluate to a pointer to the first. */
|
registers evaluate to a pointer to the first. */
|
|
|
/* A raw register named NAME, with type TYPE and sim number SIM_NUM. */
|
/* A raw register named NAME, with type TYPE and sim number SIM_NUM. */
|
#define R(name, type, sim_num) \
|
#define R(name, type, sim_num) \
|
(add_reg (arch, (name), (type), (sim_num), \
|
(add_reg (arch, (name), (type), (sim_num), \
|
m32c_raw_read, m32c_raw_write, NULL, NULL, 0))
|
m32c_raw_read, m32c_raw_write, NULL, NULL, 0))
|
|
|
/* The simulator register number for a raw register named NAME. */
|
/* The simulator register number for a raw register named NAME. */
|
#define SIM(name) (m32c_sim_reg_ ## name)
|
#define SIM(name) (m32c_sim_reg_ ## name)
|
|
|
/* A raw unsigned 16-bit data register named NAME.
|
/* A raw unsigned 16-bit data register named NAME.
|
NAME should be an identifier, not a string. */
|
NAME should be an identifier, not a string. */
|
#define R16U(name) \
|
#define R16U(name) \
|
(R(#name, tdep->uint16, SIM (name)))
|
(R(#name, tdep->uint16, SIM (name)))
|
|
|
/* A raw data address register named NAME.
|
/* A raw data address register named NAME.
|
NAME should be an identifier, not a string. */
|
NAME should be an identifier, not a string. */
|
#define RA(name) \
|
#define RA(name) \
|
(R(#name, tdep->data_addr_reg_type, SIM (name)))
|
(R(#name, tdep->data_addr_reg_type, SIM (name)))
|
|
|
/* A raw code address register named NAME. NAME should
|
/* A raw code address register named NAME. NAME should
|
be an identifier, not a string. */
|
be an identifier, not a string. */
|
#define RC(name) \
|
#define RC(name) \
|
(R(#name, tdep->code_addr_reg_type, SIM (name)))
|
(R(#name, tdep->code_addr_reg_type, SIM (name)))
|
|
|
/* A pair of raw registers named NAME0 and NAME1, with type TYPE.
|
/* A pair of raw registers named NAME0 and NAME1, with type TYPE.
|
NAME should be an identifier, not a string. */
|
NAME should be an identifier, not a string. */
|
#define RP(name, type) \
|
#define RP(name, type) \
|
(R(#name "0", (type), SIM (name ## 0)), \
|
(R(#name "0", (type), SIM (name ## 0)), \
|
R(#name "1", (type), SIM (name ## 1)) - 1)
|
R(#name "1", (type), SIM (name ## 1)) - 1)
|
|
|
/* A raw banked general-purpose data register named NAME.
|
/* A raw banked general-purpose data register named NAME.
|
NAME should be an identifier, not a string. */
|
NAME should be an identifier, not a string. */
|
#define RBD(name) \
|
#define RBD(name) \
|
(R(NULL, tdep->int16, SIM (name ## _bank0)), \
|
(R(NULL, tdep->int16, SIM (name ## _bank0)), \
|
R(NULL, tdep->int16, SIM (name ## _bank1)) - 1)
|
R(NULL, tdep->int16, SIM (name ## _bank1)) - 1)
|
|
|
/* A raw banked data address register named NAME.
|
/* A raw banked data address register named NAME.
|
NAME should be an identifier, not a string. */
|
NAME should be an identifier, not a string. */
|
#define RBA(name) \
|
#define RBA(name) \
|
(R(NULL, tdep->data_addr_reg_type, SIM (name ## _bank0)), \
|
(R(NULL, tdep->data_addr_reg_type, SIM (name ## _bank0)), \
|
R(NULL, tdep->data_addr_reg_type, SIM (name ## _bank1)) - 1)
|
R(NULL, tdep->data_addr_reg_type, SIM (name ## _bank1)) - 1)
|
|
|
/* A cooked register named NAME referring to a raw banked register
|
/* A cooked register named NAME referring to a raw banked register
|
from the bank selected by the current value of FLG. RAW_PAIR
|
from the bank selected by the current value of FLG. RAW_PAIR
|
should be a pointer to the first register in the banked pair.
|
should be a pointer to the first register in the banked pair.
|
NAME must be an identifier, not a string. */
|
NAME must be an identifier, not a string. */
|
#define CB(name, raw_pair) \
|
#define CB(name, raw_pair) \
|
(add_reg (arch, #name, (raw_pair)->type, 0, \
|
(add_reg (arch, #name, (raw_pair)->type, 0, \
|
m32c_banked_read, m32c_banked_write, \
|
m32c_banked_read, m32c_banked_write, \
|
(raw_pair), (raw_pair + 1), FLAGBIT_B))
|
(raw_pair), (raw_pair + 1), FLAGBIT_B))
|
|
|
/* A pair of registers named NAMEH and NAMEL, of type TYPE, that
|
/* A pair of registers named NAMEH and NAMEL, of type TYPE, that
|
access the top and bottom halves of the register pointed to by
|
access the top and bottom halves of the register pointed to by
|
NAME. NAME should be an identifier. */
|
NAME. NAME should be an identifier. */
|
#define CHL(name, type) \
|
#define CHL(name, type) \
|
(add_reg (arch, #name "h", (type), 0, \
|
(add_reg (arch, #name "h", (type), 0, \
|
m32c_part_read, m32c_part_write, name, NULL, 1), \
|
m32c_part_read, m32c_part_write, name, NULL, 1), \
|
add_reg (arch, #name "l", (type), 0, \
|
add_reg (arch, #name "l", (type), 0, \
|
m32c_part_read, m32c_part_write, name, NULL, 0) - 1)
|
m32c_part_read, m32c_part_write, name, NULL, 0) - 1)
|
|
|
/* A register constructed by concatenating the two registers HIGH and
|
/* A register constructed by concatenating the two registers HIGH and
|
LOW, whose name is HIGHLOW and whose type is TYPE. */
|
LOW, whose name is HIGHLOW and whose type is TYPE. */
|
#define CCAT(high, low, type) \
|
#define CCAT(high, low, type) \
|
(add_reg (arch, #high #low, (type), 0, \
|
(add_reg (arch, #high #low, (type), 0, \
|
m32c_cat_read, m32c_cat_write, (high), (low), 0))
|
m32c_cat_read, m32c_cat_write, (high), (low), 0))
|
|
|
/* Abbreviations for marking register group membership. */
|
/* Abbreviations for marking register group membership. */
|
#define G(reg) (mark_general (reg))
|
#define G(reg) (mark_general (reg))
|
#define S(reg) (mark_system (reg))
|
#define S(reg) (mark_system (reg))
|
#define DMA(reg) (mark_dma (reg))
|
#define DMA(reg) (mark_dma (reg))
|
|
|
|
|
/* Construct the register set for ARCH. */
|
/* Construct the register set for ARCH. */
|
static void
|
static void
|
make_regs (struct gdbarch *arch)
|
make_regs (struct gdbarch *arch)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
int mach = gdbarch_bfd_arch_info (arch)->mach;
|
int mach = gdbarch_bfd_arch_info (arch)->mach;
|
int num_raw_regs;
|
int num_raw_regs;
|
int num_cooked_regs;
|
int num_cooked_regs;
|
|
|
struct m32c_reg *r0;
|
struct m32c_reg *r0;
|
struct m32c_reg *r1;
|
struct m32c_reg *r1;
|
struct m32c_reg *r2;
|
struct m32c_reg *r2;
|
struct m32c_reg *r3;
|
struct m32c_reg *r3;
|
struct m32c_reg *a0;
|
struct m32c_reg *a0;
|
struct m32c_reg *a1;
|
struct m32c_reg *a1;
|
struct m32c_reg *fb;
|
struct m32c_reg *fb;
|
struct m32c_reg *sb;
|
struct m32c_reg *sb;
|
struct m32c_reg *sp;
|
struct m32c_reg *sp;
|
struct m32c_reg *r0hl;
|
struct m32c_reg *r0hl;
|
struct m32c_reg *r1hl;
|
struct m32c_reg *r1hl;
|
struct m32c_reg *r2hl;
|
struct m32c_reg *r2hl;
|
struct m32c_reg *r3hl;
|
struct m32c_reg *r3hl;
|
struct m32c_reg *intbhl;
|
struct m32c_reg *intbhl;
|
struct m32c_reg *r2r0;
|
struct m32c_reg *r2r0;
|
struct m32c_reg *r3r1;
|
struct m32c_reg *r3r1;
|
struct m32c_reg *r3r1r2r0;
|
struct m32c_reg *r3r1r2r0;
|
struct m32c_reg *r3r2r1r0;
|
struct m32c_reg *r3r2r1r0;
|
struct m32c_reg *a1a0;
|
struct m32c_reg *a1a0;
|
|
|
struct m32c_reg *raw_r0_pair = RBD (r0);
|
struct m32c_reg *raw_r0_pair = RBD (r0);
|
struct m32c_reg *raw_r1_pair = RBD (r1);
|
struct m32c_reg *raw_r1_pair = RBD (r1);
|
struct m32c_reg *raw_r2_pair = RBD (r2);
|
struct m32c_reg *raw_r2_pair = RBD (r2);
|
struct m32c_reg *raw_r3_pair = RBD (r3);
|
struct m32c_reg *raw_r3_pair = RBD (r3);
|
struct m32c_reg *raw_a0_pair = RBA (a0);
|
struct m32c_reg *raw_a0_pair = RBA (a0);
|
struct m32c_reg *raw_a1_pair = RBA (a1);
|
struct m32c_reg *raw_a1_pair = RBA (a1);
|
struct m32c_reg *raw_fb_pair = RBA (fb);
|
struct m32c_reg *raw_fb_pair = RBA (fb);
|
|
|
/* sb is banked on the bfd_mach_m32c, but not on bfd_mach_m16c.
|
/* sb is banked on the bfd_mach_m32c, but not on bfd_mach_m16c.
|
We always declare both raw registers, and deal with the distinction
|
We always declare both raw registers, and deal with the distinction
|
in the pseudoregister. */
|
in the pseudoregister. */
|
struct m32c_reg *raw_sb_pair = RBA (sb);
|
struct m32c_reg *raw_sb_pair = RBA (sb);
|
|
|
struct m32c_reg *usp = S (RA (usp));
|
struct m32c_reg *usp = S (RA (usp));
|
struct m32c_reg *isp = S (RA (isp));
|
struct m32c_reg *isp = S (RA (isp));
|
struct m32c_reg *intb = S (RC (intb));
|
struct m32c_reg *intb = S (RC (intb));
|
struct m32c_reg *pc = G (RC (pc));
|
struct m32c_reg *pc = G (RC (pc));
|
struct m32c_reg *flg = G (R16U (flg));
|
struct m32c_reg *flg = G (R16U (flg));
|
|
|
if (mach == bfd_mach_m32c)
|
if (mach == bfd_mach_m32c)
|
{
|
{
|
struct m32c_reg *svf = S (R16U (svf));
|
struct m32c_reg *svf = S (R16U (svf));
|
struct m32c_reg *svp = S (RC (svp));
|
struct m32c_reg *svp = S (RC (svp));
|
struct m32c_reg *vct = S (RC (vct));
|
struct m32c_reg *vct = S (RC (vct));
|
|
|
struct m32c_reg *dmd01 = DMA (RP (dmd, tdep->uint8));
|
struct m32c_reg *dmd01 = DMA (RP (dmd, tdep->uint8));
|
struct m32c_reg *dct01 = DMA (RP (dct, tdep->uint16));
|
struct m32c_reg *dct01 = DMA (RP (dct, tdep->uint16));
|
struct m32c_reg *drc01 = DMA (RP (drc, tdep->uint16));
|
struct m32c_reg *drc01 = DMA (RP (drc, tdep->uint16));
|
struct m32c_reg *dma01 = DMA (RP (dma, tdep->data_addr_reg_type));
|
struct m32c_reg *dma01 = DMA (RP (dma, tdep->data_addr_reg_type));
|
struct m32c_reg *dsa01 = DMA (RP (dsa, tdep->data_addr_reg_type));
|
struct m32c_reg *dsa01 = DMA (RP (dsa, tdep->data_addr_reg_type));
|
struct m32c_reg *dra01 = DMA (RP (dra, tdep->data_addr_reg_type));
|
struct m32c_reg *dra01 = DMA (RP (dra, tdep->data_addr_reg_type));
|
}
|
}
|
|
|
num_raw_regs = tdep->num_regs;
|
num_raw_regs = tdep->num_regs;
|
|
|
r0 = G (CB (r0, raw_r0_pair));
|
r0 = G (CB (r0, raw_r0_pair));
|
r1 = G (CB (r1, raw_r1_pair));
|
r1 = G (CB (r1, raw_r1_pair));
|
r2 = G (CB (r2, raw_r2_pair));
|
r2 = G (CB (r2, raw_r2_pair));
|
r3 = G (CB (r3, raw_r3_pair));
|
r3 = G (CB (r3, raw_r3_pair));
|
a0 = G (CB (a0, raw_a0_pair));
|
a0 = G (CB (a0, raw_a0_pair));
|
a1 = G (CB (a1, raw_a1_pair));
|
a1 = G (CB (a1, raw_a1_pair));
|
fb = G (CB (fb, raw_fb_pair));
|
fb = G (CB (fb, raw_fb_pair));
|
|
|
/* sb is banked on the bfd_mach_m32c, but not on bfd_mach_m16c.
|
/* sb is banked on the bfd_mach_m32c, but not on bfd_mach_m16c.
|
Specify custom read/write functions that do the right thing. */
|
Specify custom read/write functions that do the right thing. */
|
sb = G (add_reg (arch, "sb", raw_sb_pair->type, 0,
|
sb = G (add_reg (arch, "sb", raw_sb_pair->type, 0,
|
m32c_sb_read, m32c_sb_write,
|
m32c_sb_read, m32c_sb_write,
|
raw_sb_pair, raw_sb_pair + 1, 0));
|
raw_sb_pair, raw_sb_pair + 1, 0));
|
|
|
/* The current sp is either usp or isp, depending on the value of
|
/* The current sp is either usp or isp, depending on the value of
|
the FLG register's U bit. */
|
the FLG register's U bit. */
|
sp = G (add_reg (arch, "sp", usp->type, 0,
|
sp = G (add_reg (arch, "sp", usp->type, 0,
|
m32c_banked_read, m32c_banked_write,
|
m32c_banked_read, m32c_banked_write,
|
isp, usp, FLAGBIT_U));
|
isp, usp, FLAGBIT_U));
|
|
|
r0hl = CHL (r0, tdep->int8);
|
r0hl = CHL (r0, tdep->int8);
|
r1hl = CHL (r1, tdep->int8);
|
r1hl = CHL (r1, tdep->int8);
|
r2hl = CHL (r2, tdep->int8);
|
r2hl = CHL (r2, tdep->int8);
|
r3hl = CHL (r3, tdep->int8);
|
r3hl = CHL (r3, tdep->int8);
|
intbhl = CHL (intb, tdep->int16);
|
intbhl = CHL (intb, tdep->int16);
|
|
|
r2r0 = CCAT (r2, r0, tdep->int32);
|
r2r0 = CCAT (r2, r0, tdep->int32);
|
r3r1 = CCAT (r3, r1, tdep->int32);
|
r3r1 = CCAT (r3, r1, tdep->int32);
|
r3r1r2r0 = CCAT (r3r1, r2r0, tdep->int64);
|
r3r1r2r0 = CCAT (r3r1, r2r0, tdep->int64);
|
|
|
r3r2r1r0
|
r3r2r1r0
|
= add_reg (arch, "r3r2r1r0", tdep->int64, 0,
|
= add_reg (arch, "r3r2r1r0", tdep->int64, 0,
|
m32c_r3r2r1r0_read, m32c_r3r2r1r0_write, NULL, NULL, 0);
|
m32c_r3r2r1r0_read, m32c_r3r2r1r0_write, NULL, NULL, 0);
|
|
|
if (mach == bfd_mach_m16c)
|
if (mach == bfd_mach_m16c)
|
a1a0 = CCAT (a1, a0, tdep->int32);
|
a1a0 = CCAT (a1, a0, tdep->int32);
|
else
|
else
|
a1a0 = NULL;
|
a1a0 = NULL;
|
|
|
num_cooked_regs = tdep->num_regs - num_raw_regs;
|
num_cooked_regs = tdep->num_regs - num_raw_regs;
|
|
|
tdep->pc = pc;
|
tdep->pc = pc;
|
tdep->flg = flg;
|
tdep->flg = flg;
|
tdep->r0 = r0;
|
tdep->r0 = r0;
|
tdep->r1 = r1;
|
tdep->r1 = r1;
|
tdep->r2 = r2;
|
tdep->r2 = r2;
|
tdep->r3 = r3;
|
tdep->r3 = r3;
|
tdep->r2r0 = r2r0;
|
tdep->r2r0 = r2r0;
|
tdep->r3r2r1r0 = r3r2r1r0;
|
tdep->r3r2r1r0 = r3r2r1r0;
|
tdep->r3r1r2r0 = r3r1r2r0;
|
tdep->r3r1r2r0 = r3r1r2r0;
|
tdep->a0 = a0;
|
tdep->a0 = a0;
|
tdep->a1 = a1;
|
tdep->a1 = a1;
|
tdep->sb = sb;
|
tdep->sb = sb;
|
tdep->fb = fb;
|
tdep->fb = fb;
|
tdep->sp = sp;
|
tdep->sp = sp;
|
|
|
/* Set up the DWARF register table. */
|
/* Set up the DWARF register table. */
|
memset (tdep->dwarf_regs, 0, sizeof (tdep->dwarf_regs));
|
memset (tdep->dwarf_regs, 0, sizeof (tdep->dwarf_regs));
|
set_dwarf_regnum (r0hl + 1, 0x01);
|
set_dwarf_regnum (r0hl + 1, 0x01);
|
set_dwarf_regnum (r0hl + 0, 0x02);
|
set_dwarf_regnum (r0hl + 0, 0x02);
|
set_dwarf_regnum (r1hl + 1, 0x03);
|
set_dwarf_regnum (r1hl + 1, 0x03);
|
set_dwarf_regnum (r1hl + 0, 0x04);
|
set_dwarf_regnum (r1hl + 0, 0x04);
|
set_dwarf_regnum (r0, 0x05);
|
set_dwarf_regnum (r0, 0x05);
|
set_dwarf_regnum (r1, 0x06);
|
set_dwarf_regnum (r1, 0x06);
|
set_dwarf_regnum (r2, 0x07);
|
set_dwarf_regnum (r2, 0x07);
|
set_dwarf_regnum (r3, 0x08);
|
set_dwarf_regnum (r3, 0x08);
|
set_dwarf_regnum (a0, 0x09);
|
set_dwarf_regnum (a0, 0x09);
|
set_dwarf_regnum (a1, 0x0a);
|
set_dwarf_regnum (a1, 0x0a);
|
set_dwarf_regnum (fb, 0x0b);
|
set_dwarf_regnum (fb, 0x0b);
|
set_dwarf_regnum (sp, 0x0c);
|
set_dwarf_regnum (sp, 0x0c);
|
set_dwarf_regnum (pc, 0x0d); /* GCC's invention */
|
set_dwarf_regnum (pc, 0x0d); /* GCC's invention */
|
set_dwarf_regnum (sb, 0x13);
|
set_dwarf_regnum (sb, 0x13);
|
set_dwarf_regnum (r2r0, 0x15);
|
set_dwarf_regnum (r2r0, 0x15);
|
set_dwarf_regnum (r3r1, 0x16);
|
set_dwarf_regnum (r3r1, 0x16);
|
if (a1a0)
|
if (a1a0)
|
set_dwarf_regnum (a1a0, 0x17);
|
set_dwarf_regnum (a1a0, 0x17);
|
|
|
/* Enumerate the save/restore register group.
|
/* Enumerate the save/restore register group.
|
|
|
The regcache_save and regcache_restore functions apply their read
|
The regcache_save and regcache_restore functions apply their read
|
function to each register in this group.
|
function to each register in this group.
|
|
|
Since frame_pop supplies frame_unwind_register as its read
|
Since frame_pop supplies frame_unwind_register as its read
|
function, the registers meaningful to the Dwarf unwinder need to
|
function, the registers meaningful to the Dwarf unwinder need to
|
be in this group.
|
be in this group.
|
|
|
On the other hand, when we make inferior calls, save_inferior_status
|
On the other hand, when we make inferior calls, save_inferior_status
|
and restore_inferior_status use them to preserve the current register
|
and restore_inferior_status use them to preserve the current register
|
values across the inferior call. For this, you'd kind of like to
|
values across the inferior call. For this, you'd kind of like to
|
preserve all the raw registers, to protect the interrupted code from
|
preserve all the raw registers, to protect the interrupted code from
|
any sort of bank switching the callee might have done. But we handle
|
any sort of bank switching the callee might have done. But we handle
|
those cases so badly anyway --- for example, it matters whether we
|
those cases so badly anyway --- for example, it matters whether we
|
restore FLG before or after we restore the general-purpose registers,
|
restore FLG before or after we restore the general-purpose registers,
|
but there's no way to express that --- that it isn't worth worrying
|
but there's no way to express that --- that it isn't worth worrying
|
about.
|
about.
|
|
|
We omit control registers like inthl: if you call a function that
|
We omit control registers like inthl: if you call a function that
|
changes those, it's probably because you wanted that change to be
|
changes those, it's probably because you wanted that change to be
|
visible to the interrupted code. */
|
visible to the interrupted code. */
|
mark_save_restore (r0);
|
mark_save_restore (r0);
|
mark_save_restore (r1);
|
mark_save_restore (r1);
|
mark_save_restore (r2);
|
mark_save_restore (r2);
|
mark_save_restore (r3);
|
mark_save_restore (r3);
|
mark_save_restore (a0);
|
mark_save_restore (a0);
|
mark_save_restore (a1);
|
mark_save_restore (a1);
|
mark_save_restore (sb);
|
mark_save_restore (sb);
|
mark_save_restore (fb);
|
mark_save_restore (fb);
|
mark_save_restore (sp);
|
mark_save_restore (sp);
|
mark_save_restore (pc);
|
mark_save_restore (pc);
|
mark_save_restore (flg);
|
mark_save_restore (flg);
|
|
|
set_gdbarch_num_regs (arch, num_raw_regs);
|
set_gdbarch_num_regs (arch, num_raw_regs);
|
set_gdbarch_num_pseudo_regs (arch, num_cooked_regs);
|
set_gdbarch_num_pseudo_regs (arch, num_cooked_regs);
|
set_gdbarch_pc_regnum (arch, pc->num);
|
set_gdbarch_pc_regnum (arch, pc->num);
|
set_gdbarch_sp_regnum (arch, sp->num);
|
set_gdbarch_sp_regnum (arch, sp->num);
|
set_gdbarch_register_name (arch, m32c_register_name);
|
set_gdbarch_register_name (arch, m32c_register_name);
|
set_gdbarch_register_type (arch, m32c_register_type);
|
set_gdbarch_register_type (arch, m32c_register_type);
|
set_gdbarch_pseudo_register_read (arch, m32c_pseudo_register_read);
|
set_gdbarch_pseudo_register_read (arch, m32c_pseudo_register_read);
|
set_gdbarch_pseudo_register_write (arch, m32c_pseudo_register_write);
|
set_gdbarch_pseudo_register_write (arch, m32c_pseudo_register_write);
|
set_gdbarch_register_sim_regno (arch, m32c_register_sim_regno);
|
set_gdbarch_register_sim_regno (arch, m32c_register_sim_regno);
|
set_gdbarch_stab_reg_to_regnum (arch, m32c_debug_info_reg_to_regnum);
|
set_gdbarch_stab_reg_to_regnum (arch, m32c_debug_info_reg_to_regnum);
|
set_gdbarch_dwarf2_reg_to_regnum (arch, m32c_debug_info_reg_to_regnum);
|
set_gdbarch_dwarf2_reg_to_regnum (arch, m32c_debug_info_reg_to_regnum);
|
set_gdbarch_register_reggroup_p (arch, m32c_register_reggroup_p);
|
set_gdbarch_register_reggroup_p (arch, m32c_register_reggroup_p);
|
|
|
reggroup_add (arch, general_reggroup);
|
reggroup_add (arch, general_reggroup);
|
reggroup_add (arch, all_reggroup);
|
reggroup_add (arch, all_reggroup);
|
reggroup_add (arch, save_reggroup);
|
reggroup_add (arch, save_reggroup);
|
reggroup_add (arch, restore_reggroup);
|
reggroup_add (arch, restore_reggroup);
|
reggroup_add (arch, system_reggroup);
|
reggroup_add (arch, system_reggroup);
|
reggroup_add (arch, m32c_dma_reggroup);
|
reggroup_add (arch, m32c_dma_reggroup);
|
}
|
}
|
|
|
|
|
|
|
/* Breakpoints. */
|
/* Breakpoints. */
|
|
|
static const unsigned char *
|
static const unsigned char *
|
m32c_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pc, int *len)
|
m32c_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pc, int *len)
|
{
|
{
|
static unsigned char break_insn[] = { 0x00 }; /* brk */
|
static unsigned char break_insn[] = { 0x00 }; /* brk */
|
|
|
*len = sizeof (break_insn);
|
*len = sizeof (break_insn);
|
return break_insn;
|
return break_insn;
|
}
|
}
|
|
|
|
|
|
|
/* Prologue analysis. */
|
/* Prologue analysis. */
|
|
|
struct m32c_prologue
|
struct m32c_prologue
|
{
|
{
|
/* For consistency with the DWARF 2 .debug_frame info generated by
|
/* For consistency with the DWARF 2 .debug_frame info generated by
|
GCC, a frame's CFA is the address immediately after the saved
|
GCC, a frame's CFA is the address immediately after the saved
|
return address. */
|
return address. */
|
|
|
/* The architecture for which we generated this prologue info. */
|
/* The architecture for which we generated this prologue info. */
|
struct gdbarch *arch;
|
struct gdbarch *arch;
|
|
|
enum {
|
enum {
|
/* This function uses a frame pointer. */
|
/* This function uses a frame pointer. */
|
prologue_with_frame_ptr,
|
prologue_with_frame_ptr,
|
|
|
/* This function has no frame pointer. */
|
/* This function has no frame pointer. */
|
prologue_sans_frame_ptr,
|
prologue_sans_frame_ptr,
|
|
|
/* This function sets up the stack, so its frame is the first
|
/* This function sets up the stack, so its frame is the first
|
frame on the stack. */
|
frame on the stack. */
|
prologue_first_frame
|
prologue_first_frame
|
|
|
} kind;
|
} kind;
|
|
|
/* If KIND is prologue_with_frame_ptr, this is the offset from the
|
/* If KIND is prologue_with_frame_ptr, this is the offset from the
|
CFA to where the frame pointer points. This is always zero or
|
CFA to where the frame pointer points. This is always zero or
|
negative. */
|
negative. */
|
LONGEST frame_ptr_offset;
|
LONGEST frame_ptr_offset;
|
|
|
/* If KIND is prologue_sans_frame_ptr, the offset from the CFA to
|
/* If KIND is prologue_sans_frame_ptr, the offset from the CFA to
|
the stack pointer --- always zero or negative.
|
the stack pointer --- always zero or negative.
|
|
|
Calling this a "size" is a bit misleading, but given that the
|
Calling this a "size" is a bit misleading, but given that the
|
stack grows downwards, using offsets for everything keeps one
|
stack grows downwards, using offsets for everything keeps one
|
from going completely sign-crazy: you never change anything's
|
from going completely sign-crazy: you never change anything's
|
sign for an ADD instruction; always change the second operand's
|
sign for an ADD instruction; always change the second operand's
|
sign for a SUB instruction; and everything takes care of
|
sign for a SUB instruction; and everything takes care of
|
itself.
|
itself.
|
|
|
Functions that use alloca don't have a constant frame size. But
|
Functions that use alloca don't have a constant frame size. But
|
they always have frame pointers, so we must use that to find the
|
they always have frame pointers, so we must use that to find the
|
CFA (and perhaps to unwind the stack pointer). */
|
CFA (and perhaps to unwind the stack pointer). */
|
LONGEST frame_size;
|
LONGEST frame_size;
|
|
|
/* The address of the first instruction at which the frame has been
|
/* The address of the first instruction at which the frame has been
|
set up and the arguments are where the debug info says they are
|
set up and the arguments are where the debug info says they are
|
--- as best as we can tell. */
|
--- as best as we can tell. */
|
CORE_ADDR prologue_end;
|
CORE_ADDR prologue_end;
|
|
|
/* reg_offset[R] is the offset from the CFA at which register R is
|
/* reg_offset[R] is the offset from the CFA at which register R is
|
saved, or 1 if register R has not been saved. (Real values are
|
saved, or 1 if register R has not been saved. (Real values are
|
always zero or negative.) */
|
always zero or negative.) */
|
LONGEST reg_offset[M32C_MAX_NUM_REGS];
|
LONGEST reg_offset[M32C_MAX_NUM_REGS];
|
};
|
};
|
|
|
|
|
/* The longest I've seen, anyway. */
|
/* The longest I've seen, anyway. */
|
#define M32C_MAX_INSN_LEN (9)
|
#define M32C_MAX_INSN_LEN (9)
|
|
|
/* Processor state, for the prologue analyzer. */
|
/* Processor state, for the prologue analyzer. */
|
struct m32c_pv_state
|
struct m32c_pv_state
|
{
|
{
|
struct gdbarch *arch;
|
struct gdbarch *arch;
|
pv_t r0, r1, r2, r3;
|
pv_t r0, r1, r2, r3;
|
pv_t a0, a1;
|
pv_t a0, a1;
|
pv_t sb, fb, sp;
|
pv_t sb, fb, sp;
|
pv_t pc;
|
pv_t pc;
|
struct pv_area *stack;
|
struct pv_area *stack;
|
|
|
/* Bytes from the current PC, the address they were read from,
|
/* Bytes from the current PC, the address they were read from,
|
and the address of the next unconsumed byte. */
|
and the address of the next unconsumed byte. */
|
gdb_byte insn[M32C_MAX_INSN_LEN];
|
gdb_byte insn[M32C_MAX_INSN_LEN];
|
CORE_ADDR scan_pc, next_addr;
|
CORE_ADDR scan_pc, next_addr;
|
};
|
};
|
|
|
|
|
/* Push VALUE on STATE's stack, occupying SIZE bytes. Return zero if
|
/* Push VALUE on STATE's stack, occupying SIZE bytes. Return zero if
|
all went well, or non-zero if simulating the action would trash our
|
all went well, or non-zero if simulating the action would trash our
|
state. */
|
state. */
|
static int
|
static int
|
m32c_pv_push (struct m32c_pv_state *state, pv_t value, int size)
|
m32c_pv_push (struct m32c_pv_state *state, pv_t value, int size)
|
{
|
{
|
if (pv_area_store_would_trash (state->stack, state->sp))
|
if (pv_area_store_would_trash (state->stack, state->sp))
|
return 1;
|
return 1;
|
|
|
state->sp = pv_add_constant (state->sp, -size);
|
state->sp = pv_add_constant (state->sp, -size);
|
pv_area_store (state->stack, state->sp, size, value);
|
pv_area_store (state->stack, state->sp, size, value);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
/* A source or destination location for an m16c or m32c
|
/* A source or destination location for an m16c or m32c
|
instruction. */
|
instruction. */
|
struct srcdest
|
struct srcdest
|
{
|
{
|
/* If srcdest_reg, the location is a register pointed to by REG.
|
/* If srcdest_reg, the location is a register pointed to by REG.
|
If srcdest_partial_reg, the location is part of a register pointed
|
If srcdest_partial_reg, the location is part of a register pointed
|
to by REG. We don't try to handle this too well.
|
to by REG. We don't try to handle this too well.
|
If srcdest_mem, the location is memory whose address is ADDR. */
|
If srcdest_mem, the location is memory whose address is ADDR. */
|
enum { srcdest_reg, srcdest_partial_reg, srcdest_mem } kind;
|
enum { srcdest_reg, srcdest_partial_reg, srcdest_mem } kind;
|
pv_t *reg, addr;
|
pv_t *reg, addr;
|
};
|
};
|
|
|
|
|
/* Return the SIZE-byte value at LOC in STATE. */
|
/* Return the SIZE-byte value at LOC in STATE. */
|
static pv_t
|
static pv_t
|
m32c_srcdest_fetch (struct m32c_pv_state *state, struct srcdest loc, int size)
|
m32c_srcdest_fetch (struct m32c_pv_state *state, struct srcdest loc, int size)
|
{
|
{
|
if (loc.kind == srcdest_mem)
|
if (loc.kind == srcdest_mem)
|
return pv_area_fetch (state->stack, loc.addr, size);
|
return pv_area_fetch (state->stack, loc.addr, size);
|
else if (loc.kind == srcdest_partial_reg)
|
else if (loc.kind == srcdest_partial_reg)
|
return pv_unknown ();
|
return pv_unknown ();
|
else
|
else
|
return *loc.reg;
|
return *loc.reg;
|
}
|
}
|
|
|
|
|
/* Write VALUE, a SIZE-byte value, to LOC in STATE. Return zero if
|
/* Write VALUE, a SIZE-byte value, to LOC in STATE. Return zero if
|
all went well, or non-zero if simulating the store would trash our
|
all went well, or non-zero if simulating the store would trash our
|
state. */
|
state. */
|
static int
|
static int
|
m32c_srcdest_store (struct m32c_pv_state *state, struct srcdest loc,
|
m32c_srcdest_store (struct m32c_pv_state *state, struct srcdest loc,
|
pv_t value, int size)
|
pv_t value, int size)
|
{
|
{
|
if (loc.kind == srcdest_mem)
|
if (loc.kind == srcdest_mem)
|
{
|
{
|
if (pv_area_store_would_trash (state->stack, loc.addr))
|
if (pv_area_store_would_trash (state->stack, loc.addr))
|
return 1;
|
return 1;
|
pv_area_store (state->stack, loc.addr, size, value);
|
pv_area_store (state->stack, loc.addr, size, value);
|
}
|
}
|
else if (loc.kind == srcdest_partial_reg)
|
else if (loc.kind == srcdest_partial_reg)
|
*loc.reg = pv_unknown ();
|
*loc.reg = pv_unknown ();
|
else
|
else
|
*loc.reg = value;
|
*loc.reg = value;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
static int
|
static int
|
m32c_sign_ext (int v, int bits)
|
m32c_sign_ext (int v, int bits)
|
{
|
{
|
int mask = 1 << (bits - 1);
|
int mask = 1 << (bits - 1);
|
return (v ^ mask) - mask;
|
return (v ^ mask) - mask;
|
}
|
}
|
|
|
static unsigned int
|
static unsigned int
|
m32c_next_byte (struct m32c_pv_state *st)
|
m32c_next_byte (struct m32c_pv_state *st)
|
{
|
{
|
gdb_assert (st->next_addr - st->scan_pc < sizeof (st->insn));
|
gdb_assert (st->next_addr - st->scan_pc < sizeof (st->insn));
|
return st->insn[st->next_addr++ - st->scan_pc];
|
return st->insn[st->next_addr++ - st->scan_pc];
|
}
|
}
|
|
|
static int
|
static int
|
m32c_udisp8 (struct m32c_pv_state *st)
|
m32c_udisp8 (struct m32c_pv_state *st)
|
{
|
{
|
return m32c_next_byte (st);
|
return m32c_next_byte (st);
|
}
|
}
|
|
|
|
|
static int
|
static int
|
m32c_sdisp8 (struct m32c_pv_state *st)
|
m32c_sdisp8 (struct m32c_pv_state *st)
|
{
|
{
|
return m32c_sign_ext (m32c_next_byte (st), 8);
|
return m32c_sign_ext (m32c_next_byte (st), 8);
|
}
|
}
|
|
|
|
|
static int
|
static int
|
m32c_udisp16 (struct m32c_pv_state *st)
|
m32c_udisp16 (struct m32c_pv_state *st)
|
{
|
{
|
int low = m32c_next_byte (st);
|
int low = m32c_next_byte (st);
|
int high = m32c_next_byte (st);
|
int high = m32c_next_byte (st);
|
|
|
return low + (high << 8);
|
return low + (high << 8);
|
}
|
}
|
|
|
|
|
static int
|
static int
|
m32c_sdisp16 (struct m32c_pv_state *st)
|
m32c_sdisp16 (struct m32c_pv_state *st)
|
{
|
{
|
int low = m32c_next_byte (st);
|
int low = m32c_next_byte (st);
|
int high = m32c_next_byte (st);
|
int high = m32c_next_byte (st);
|
|
|
return m32c_sign_ext (low + (high << 8), 16);
|
return m32c_sign_ext (low + (high << 8), 16);
|
}
|
}
|
|
|
|
|
static int
|
static int
|
m32c_udisp24 (struct m32c_pv_state *st)
|
m32c_udisp24 (struct m32c_pv_state *st)
|
{
|
{
|
int low = m32c_next_byte (st);
|
int low = m32c_next_byte (st);
|
int mid = m32c_next_byte (st);
|
int mid = m32c_next_byte (st);
|
int high = m32c_next_byte (st);
|
int high = m32c_next_byte (st);
|
|
|
return low + (mid << 8) + (high << 16);
|
return low + (mid << 8) + (high << 16);
|
}
|
}
|
|
|
|
|
/* Extract the 'source' field from an m32c MOV.size:G-format instruction. */
|
/* Extract the 'source' field from an m32c MOV.size:G-format instruction. */
|
static int
|
static int
|
m32c_get_src23 (unsigned char *i)
|
m32c_get_src23 (unsigned char *i)
|
{
|
{
|
return (((i[0] & 0x70) >> 2)
|
return (((i[0] & 0x70) >> 2)
|
| ((i[1] & 0x30) >> 4));
|
| ((i[1] & 0x30) >> 4));
|
}
|
}
|
|
|
|
|
/* Extract the 'dest' field from an m32c MOV.size:G-format instruction. */
|
/* Extract the 'dest' field from an m32c MOV.size:G-format instruction. */
|
static int
|
static int
|
m32c_get_dest23 (unsigned char *i)
|
m32c_get_dest23 (unsigned char *i)
|
{
|
{
|
return (((i[0] & 0x0e) << 1)
|
return (((i[0] & 0x0e) << 1)
|
| ((i[1] & 0xc0) >> 6));
|
| ((i[1] & 0xc0) >> 6));
|
}
|
}
|
|
|
|
|
static struct srcdest
|
static struct srcdest
|
m32c_decode_srcdest4 (struct m32c_pv_state *st,
|
m32c_decode_srcdest4 (struct m32c_pv_state *st,
|
int code, int size)
|
int code, int size)
|
{
|
{
|
struct srcdest sd;
|
struct srcdest sd;
|
|
|
if (code < 6)
|
if (code < 6)
|
sd.kind = (size == 2 ? srcdest_reg : srcdest_partial_reg);
|
sd.kind = (size == 2 ? srcdest_reg : srcdest_partial_reg);
|
else
|
else
|
sd.kind = srcdest_mem;
|
sd.kind = srcdest_mem;
|
|
|
sd.addr = pv_unknown ();
|
sd.addr = pv_unknown ();
|
sd.reg = 0;
|
sd.reg = 0;
|
|
|
switch (code)
|
switch (code)
|
{
|
{
|
case 0x0: sd.reg = (size == 1 ? &st->r0 : &st->r0); break;
|
case 0x0: sd.reg = (size == 1 ? &st->r0 : &st->r0); break;
|
case 0x1: sd.reg = (size == 1 ? &st->r0 : &st->r1); break;
|
case 0x1: sd.reg = (size == 1 ? &st->r0 : &st->r1); break;
|
case 0x2: sd.reg = (size == 1 ? &st->r1 : &st->r2); break;
|
case 0x2: sd.reg = (size == 1 ? &st->r1 : &st->r2); break;
|
case 0x3: sd.reg = (size == 1 ? &st->r1 : &st->r3); break;
|
case 0x3: sd.reg = (size == 1 ? &st->r1 : &st->r3); break;
|
|
|
case 0x4: sd.reg = &st->a0; break;
|
case 0x4: sd.reg = &st->a0; break;
|
case 0x5: sd.reg = &st->a1; break;
|
case 0x5: sd.reg = &st->a1; break;
|
|
|
case 0x6: sd.addr = st->a0; break;
|
case 0x6: sd.addr = st->a0; break;
|
case 0x7: sd.addr = st->a1; break;
|
case 0x7: sd.addr = st->a1; break;
|
|
|
case 0x8: sd.addr = pv_add_constant (st->a0, m32c_udisp8 (st)); break;
|
case 0x8: sd.addr = pv_add_constant (st->a0, m32c_udisp8 (st)); break;
|
case 0x9: sd.addr = pv_add_constant (st->a1, m32c_udisp8 (st)); break;
|
case 0x9: sd.addr = pv_add_constant (st->a1, m32c_udisp8 (st)); break;
|
case 0xa: sd.addr = pv_add_constant (st->sb, m32c_udisp8 (st)); break;
|
case 0xa: sd.addr = pv_add_constant (st->sb, m32c_udisp8 (st)); break;
|
case 0xb: sd.addr = pv_add_constant (st->fb, m32c_sdisp8 (st)); break;
|
case 0xb: sd.addr = pv_add_constant (st->fb, m32c_sdisp8 (st)); break;
|
|
|
case 0xc: sd.addr = pv_add_constant (st->a0, m32c_udisp16 (st)); break;
|
case 0xc: sd.addr = pv_add_constant (st->a0, m32c_udisp16 (st)); break;
|
case 0xd: sd.addr = pv_add_constant (st->a1, m32c_udisp16 (st)); break;
|
case 0xd: sd.addr = pv_add_constant (st->a1, m32c_udisp16 (st)); break;
|
case 0xe: sd.addr = pv_add_constant (st->sb, m32c_udisp16 (st)); break;
|
case 0xe: sd.addr = pv_add_constant (st->sb, m32c_udisp16 (st)); break;
|
case 0xf: sd.addr = pv_constant (m32c_udisp16 (st)); break;
|
case 0xf: sd.addr = pv_constant (m32c_udisp16 (st)); break;
|
|
|
default:
|
default:
|
gdb_assert (0);
|
gdb_assert (0);
|
}
|
}
|
|
|
return sd;
|
return sd;
|
}
|
}
|
|
|
|
|
static struct srcdest
|
static struct srcdest
|
m32c_decode_sd23 (struct m32c_pv_state *st, int code, int size, int ind)
|
m32c_decode_sd23 (struct m32c_pv_state *st, int code, int size, int ind)
|
{
|
{
|
struct srcdest sd;
|
struct srcdest sd;
|
|
|
sd.addr = pv_unknown ();
|
sd.addr = pv_unknown ();
|
sd.reg = 0;
|
sd.reg = 0;
|
|
|
switch (code)
|
switch (code)
|
{
|
{
|
case 0x12:
|
case 0x12:
|
case 0x13:
|
case 0x13:
|
case 0x10:
|
case 0x10:
|
case 0x11:
|
case 0x11:
|
sd.kind = (size == 1) ? srcdest_partial_reg : srcdest_reg;
|
sd.kind = (size == 1) ? srcdest_partial_reg : srcdest_reg;
|
break;
|
break;
|
|
|
case 0x02:
|
case 0x02:
|
case 0x03:
|
case 0x03:
|
sd.kind = (size == 4) ? srcdest_reg : srcdest_partial_reg;
|
sd.kind = (size == 4) ? srcdest_reg : srcdest_partial_reg;
|
break;
|
break;
|
|
|
default:
|
default:
|
sd.kind = srcdest_mem;
|
sd.kind = srcdest_mem;
|
break;
|
break;
|
|
|
}
|
}
|
|
|
switch (code)
|
switch (code)
|
{
|
{
|
case 0x12: sd.reg = &st->r0; break;
|
case 0x12: sd.reg = &st->r0; break;
|
case 0x13: sd.reg = &st->r1; break;
|
case 0x13: sd.reg = &st->r1; break;
|
case 0x10: sd.reg = ((size == 1) ? &st->r0 : &st->r2); break;
|
case 0x10: sd.reg = ((size == 1) ? &st->r0 : &st->r2); break;
|
case 0x11: sd.reg = ((size == 1) ? &st->r1 : &st->r3); break;
|
case 0x11: sd.reg = ((size == 1) ? &st->r1 : &st->r3); break;
|
case 0x02: sd.reg = &st->a0; break;
|
case 0x02: sd.reg = &st->a0; break;
|
case 0x03: sd.reg = &st->a1; break;
|
case 0x03: sd.reg = &st->a1; break;
|
|
|
case 0x00: sd.addr = st->a0; break;
|
case 0x00: sd.addr = st->a0; break;
|
case 0x01: sd.addr = st->a1; break;
|
case 0x01: sd.addr = st->a1; break;
|
case 0x04: sd.addr = pv_add_constant (st->a0, m32c_udisp8 (st)); break;
|
case 0x04: sd.addr = pv_add_constant (st->a0, m32c_udisp8 (st)); break;
|
case 0x05: sd.addr = pv_add_constant (st->a1, m32c_udisp8 (st)); break;
|
case 0x05: sd.addr = pv_add_constant (st->a1, m32c_udisp8 (st)); break;
|
case 0x06: sd.addr = pv_add_constant (st->sb, m32c_udisp8 (st)); break;
|
case 0x06: sd.addr = pv_add_constant (st->sb, m32c_udisp8 (st)); break;
|
case 0x07: sd.addr = pv_add_constant (st->fb, m32c_sdisp8 (st)); break;
|
case 0x07: sd.addr = pv_add_constant (st->fb, m32c_sdisp8 (st)); break;
|
case 0x08: sd.addr = pv_add_constant (st->a0, m32c_udisp16 (st)); break;
|
case 0x08: sd.addr = pv_add_constant (st->a0, m32c_udisp16 (st)); break;
|
case 0x09: sd.addr = pv_add_constant (st->a1, m32c_udisp16 (st)); break;
|
case 0x09: sd.addr = pv_add_constant (st->a1, m32c_udisp16 (st)); break;
|
case 0x0a: sd.addr = pv_add_constant (st->sb, m32c_udisp16 (st)); break;
|
case 0x0a: sd.addr = pv_add_constant (st->sb, m32c_udisp16 (st)); break;
|
case 0x0b: sd.addr = pv_add_constant (st->fb, m32c_sdisp16 (st)); break;
|
case 0x0b: sd.addr = pv_add_constant (st->fb, m32c_sdisp16 (st)); break;
|
case 0x0c: sd.addr = pv_add_constant (st->a0, m32c_udisp24 (st)); break;
|
case 0x0c: sd.addr = pv_add_constant (st->a0, m32c_udisp24 (st)); break;
|
case 0x0d: sd.addr = pv_add_constant (st->a1, m32c_udisp24 (st)); break;
|
case 0x0d: sd.addr = pv_add_constant (st->a1, m32c_udisp24 (st)); break;
|
case 0x0f: sd.addr = pv_constant (m32c_udisp16 (st)); break;
|
case 0x0f: sd.addr = pv_constant (m32c_udisp16 (st)); break;
|
case 0x0e: sd.addr = pv_constant (m32c_udisp24 (st)); break;
|
case 0x0e: sd.addr = pv_constant (m32c_udisp24 (st)); break;
|
default:
|
default:
|
gdb_assert (0);
|
gdb_assert (0);
|
}
|
}
|
|
|
if (ind)
|
if (ind)
|
{
|
{
|
sd.addr = m32c_srcdest_fetch (st, sd, 4);
|
sd.addr = m32c_srcdest_fetch (st, sd, 4);
|
sd.kind = srcdest_mem;
|
sd.kind = srcdest_mem;
|
}
|
}
|
|
|
return sd;
|
return sd;
|
}
|
}
|
|
|
|
|
/* The r16c and r32c machines have instructions with similar
|
/* The r16c and r32c machines have instructions with similar
|
semantics, but completely different machine language encodings. So
|
semantics, but completely different machine language encodings. So
|
we break out the semantics into their own functions, and leave
|
we break out the semantics into their own functions, and leave
|
machine-specific decoding in m32c_analyze_prologue.
|
machine-specific decoding in m32c_analyze_prologue.
|
|
|
The following functions all expect their arguments already decoded,
|
The following functions all expect their arguments already decoded,
|
and they all return zero if analysis should continue past this
|
and they all return zero if analysis should continue past this
|
instruction, or non-zero if analysis should stop. */
|
instruction, or non-zero if analysis should stop. */
|
|
|
|
|
/* Simulate an 'enter SIZE' instruction in STATE. */
|
/* Simulate an 'enter SIZE' instruction in STATE. */
|
static int
|
static int
|
m32c_pv_enter (struct m32c_pv_state *state, int size)
|
m32c_pv_enter (struct m32c_pv_state *state, int size)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (state->arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (state->arch);
|
|
|
/* If simulating this store would require us to forget
|
/* If simulating this store would require us to forget
|
everything we know about the stack frame in the name of
|
everything we know about the stack frame in the name of
|
accuracy, it would be better to just quit now. */
|
accuracy, it would be better to just quit now. */
|
if (pv_area_store_would_trash (state->stack, state->sp))
|
if (pv_area_store_would_trash (state->stack, state->sp))
|
return 1;
|
return 1;
|
|
|
if (m32c_pv_push (state, state->fb, tdep->push_addr_bytes))
|
if (m32c_pv_push (state, state->fb, tdep->push_addr_bytes))
|
return 1;
|
return 1;
|
state->fb = state->sp;
|
state->fb = state->sp;
|
state->sp = pv_add_constant (state->sp, -size);
|
state->sp = pv_add_constant (state->sp, -size);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
static int
|
static int
|
m32c_pv_pushm_one (struct m32c_pv_state *state, pv_t reg,
|
m32c_pv_pushm_one (struct m32c_pv_state *state, pv_t reg,
|
int bit, int src, int size)
|
int bit, int src, int size)
|
{
|
{
|
if (bit & src)
|
if (bit & src)
|
{
|
{
|
if (m32c_pv_push (state, reg, size))
|
if (m32c_pv_push (state, reg, size))
|
return 1;
|
return 1;
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
/* Simulate a 'pushm SRC' instruction in STATE. */
|
/* Simulate a 'pushm SRC' instruction in STATE. */
|
static int
|
static int
|
m32c_pv_pushm (struct m32c_pv_state *state, int src)
|
m32c_pv_pushm (struct m32c_pv_state *state, int src)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (state->arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (state->arch);
|
|
|
/* The bits in SRC indicating which registers to save are:
|
/* The bits in SRC indicating which registers to save are:
|
r0 r1 r2 r3 a0 a1 sb fb */
|
r0 r1 r2 r3 a0 a1 sb fb */
|
return
|
return
|
( m32c_pv_pushm_one (state, state->fb, 0x01, src, tdep->push_addr_bytes)
|
( m32c_pv_pushm_one (state, state->fb, 0x01, src, tdep->push_addr_bytes)
|
|| m32c_pv_pushm_one (state, state->sb, 0x02, src, tdep->push_addr_bytes)
|
|| m32c_pv_pushm_one (state, state->sb, 0x02, src, tdep->push_addr_bytes)
|
|| m32c_pv_pushm_one (state, state->a1, 0x04, src, tdep->push_addr_bytes)
|
|| m32c_pv_pushm_one (state, state->a1, 0x04, src, tdep->push_addr_bytes)
|
|| m32c_pv_pushm_one (state, state->a0, 0x08, src, tdep->push_addr_bytes)
|
|| m32c_pv_pushm_one (state, state->a0, 0x08, src, tdep->push_addr_bytes)
|
|| m32c_pv_pushm_one (state, state->r3, 0x10, src, 2)
|
|| m32c_pv_pushm_one (state, state->r3, 0x10, src, 2)
|
|| m32c_pv_pushm_one (state, state->r2, 0x20, src, 2)
|
|| m32c_pv_pushm_one (state, state->r2, 0x20, src, 2)
|
|| m32c_pv_pushm_one (state, state->r1, 0x40, src, 2)
|
|| m32c_pv_pushm_one (state, state->r1, 0x40, src, 2)
|
|| m32c_pv_pushm_one (state, state->r0, 0x80, src, 2));
|
|| m32c_pv_pushm_one (state, state->r0, 0x80, src, 2));
|
}
|
}
|
|
|
/* Return non-zero if VALUE is the first incoming argument register. */
|
/* Return non-zero if VALUE is the first incoming argument register. */
|
|
|
static int
|
static int
|
m32c_is_1st_arg_reg (struct m32c_pv_state *state, pv_t value)
|
m32c_is_1st_arg_reg (struct m32c_pv_state *state, pv_t value)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (state->arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (state->arch);
|
return (value.kind == pvk_register
|
return (value.kind == pvk_register
|
&& (gdbarch_bfd_arch_info (state->arch)->mach == bfd_mach_m16c
|
&& (gdbarch_bfd_arch_info (state->arch)->mach == bfd_mach_m16c
|
? (value.reg == tdep->r1->num)
|
? (value.reg == tdep->r1->num)
|
: (value.reg == tdep->r0->num))
|
: (value.reg == tdep->r0->num))
|
&& value.k == 0);
|
&& value.k == 0);
|
}
|
}
|
|
|
/* Return non-zero if VALUE is an incoming argument register. */
|
/* Return non-zero if VALUE is an incoming argument register. */
|
|
|
static int
|
static int
|
m32c_is_arg_reg (struct m32c_pv_state *state, pv_t value)
|
m32c_is_arg_reg (struct m32c_pv_state *state, pv_t value)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (state->arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (state->arch);
|
return (value.kind == pvk_register
|
return (value.kind == pvk_register
|
&& (gdbarch_bfd_arch_info (state->arch)->mach == bfd_mach_m16c
|
&& (gdbarch_bfd_arch_info (state->arch)->mach == bfd_mach_m16c
|
? (value.reg == tdep->r1->num || value.reg == tdep->r2->num)
|
? (value.reg == tdep->r1->num || value.reg == tdep->r2->num)
|
: (value.reg == tdep->r0->num))
|
: (value.reg == tdep->r0->num))
|
&& value.k == 0);
|
&& value.k == 0);
|
}
|
}
|
|
|
/* Return non-zero if a store of VALUE to LOC is probably spilling an
|
/* Return non-zero if a store of VALUE to LOC is probably spilling an
|
argument register to its stack slot in STATE. Such instructions
|
argument register to its stack slot in STATE. Such instructions
|
should be included in the prologue, if possible.
|
should be included in the prologue, if possible.
|
|
|
The store is a spill if:
|
The store is a spill if:
|
- the value being stored is the original value of an argument register;
|
- the value being stored is the original value of an argument register;
|
- the value has not already been stored somewhere in STACK; and
|
- the value has not already been stored somewhere in STACK; and
|
- LOC is a stack slot (e.g., a memory location whose address is
|
- LOC is a stack slot (e.g., a memory location whose address is
|
relative to the original value of the SP). */
|
relative to the original value of the SP). */
|
|
|
static int
|
static int
|
m32c_is_arg_spill (struct m32c_pv_state *st,
|
m32c_is_arg_spill (struct m32c_pv_state *st,
|
struct srcdest loc,
|
struct srcdest loc,
|
pv_t value)
|
pv_t value)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (st->arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (st->arch);
|
|
|
return (m32c_is_arg_reg (st, value)
|
return (m32c_is_arg_reg (st, value)
|
&& loc.kind == srcdest_mem
|
&& loc.kind == srcdest_mem
|
&& pv_is_register (loc.addr, tdep->sp->num)
|
&& pv_is_register (loc.addr, tdep->sp->num)
|
&& ! pv_area_find_reg (st->stack, st->arch, value.reg, 0));
|
&& ! pv_area_find_reg (st->stack, st->arch, value.reg, 0));
|
}
|
}
|
|
|
/* Return non-zero if a store of VALUE to LOC is probably
|
/* Return non-zero if a store of VALUE to LOC is probably
|
copying the struct return address into an address register
|
copying the struct return address into an address register
|
for immediate use. This is basically a "spill" into the
|
for immediate use. This is basically a "spill" into the
|
address register, instead of onto the stack.
|
address register, instead of onto the stack.
|
|
|
The prerequisites are:
|
The prerequisites are:
|
- value being stored is original value of the FIRST arg register;
|
- value being stored is original value of the FIRST arg register;
|
- value has not already been stored on stack; and
|
- value has not already been stored on stack; and
|
- LOC is an address register (a0 or a1). */
|
- LOC is an address register (a0 or a1). */
|
|
|
static int
|
static int
|
m32c_is_struct_return (struct m32c_pv_state *st,
|
m32c_is_struct_return (struct m32c_pv_state *st,
|
struct srcdest loc,
|
struct srcdest loc,
|
pv_t value)
|
pv_t value)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (st->arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (st->arch);
|
|
|
return (m32c_is_1st_arg_reg (st, value)
|
return (m32c_is_1st_arg_reg (st, value)
|
&& !pv_area_find_reg (st->stack, st->arch, value.reg, 0)
|
&& !pv_area_find_reg (st->stack, st->arch, value.reg, 0)
|
&& loc.kind == srcdest_reg
|
&& loc.kind == srcdest_reg
|
&& (pv_is_register (*loc.reg, tdep->a0->num)
|
&& (pv_is_register (*loc.reg, tdep->a0->num)
|
|| pv_is_register (*loc.reg, tdep->a1->num)));
|
|| pv_is_register (*loc.reg, tdep->a1->num)));
|
}
|
}
|
|
|
/* Return non-zero if a 'pushm' saving the registers indicated by SRC
|
/* Return non-zero if a 'pushm' saving the registers indicated by SRC
|
was a register save:
|
was a register save:
|
- all the named registers should have their original values, and
|
- all the named registers should have their original values, and
|
- the stack pointer should be at a constant offset from the
|
- the stack pointer should be at a constant offset from the
|
original stack pointer. */
|
original stack pointer. */
|
static int
|
static int
|
m32c_pushm_is_reg_save (struct m32c_pv_state *st, int src)
|
m32c_pushm_is_reg_save (struct m32c_pv_state *st, int src)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (st->arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (st->arch);
|
/* The bits in SRC indicating which registers to save are:
|
/* The bits in SRC indicating which registers to save are:
|
r0 r1 r2 r3 a0 a1 sb fb */
|
r0 r1 r2 r3 a0 a1 sb fb */
|
return
|
return
|
(pv_is_register (st->sp, tdep->sp->num)
|
(pv_is_register (st->sp, tdep->sp->num)
|
&& (! (src & 0x01) || pv_is_register_k (st->fb, tdep->fb->num, 0))
|
&& (! (src & 0x01) || pv_is_register_k (st->fb, tdep->fb->num, 0))
|
&& (! (src & 0x02) || pv_is_register_k (st->sb, tdep->sb->num, 0))
|
&& (! (src & 0x02) || pv_is_register_k (st->sb, tdep->sb->num, 0))
|
&& (! (src & 0x04) || pv_is_register_k (st->a1, tdep->a1->num, 0))
|
&& (! (src & 0x04) || pv_is_register_k (st->a1, tdep->a1->num, 0))
|
&& (! (src & 0x08) || pv_is_register_k (st->a0, tdep->a0->num, 0))
|
&& (! (src & 0x08) || pv_is_register_k (st->a0, tdep->a0->num, 0))
|
&& (! (src & 0x10) || pv_is_register_k (st->r3, tdep->r3->num, 0))
|
&& (! (src & 0x10) || pv_is_register_k (st->r3, tdep->r3->num, 0))
|
&& (! (src & 0x20) || pv_is_register_k (st->r2, tdep->r2->num, 0))
|
&& (! (src & 0x20) || pv_is_register_k (st->r2, tdep->r2->num, 0))
|
&& (! (src & 0x40) || pv_is_register_k (st->r1, tdep->r1->num, 0))
|
&& (! (src & 0x40) || pv_is_register_k (st->r1, tdep->r1->num, 0))
|
&& (! (src & 0x80) || pv_is_register_k (st->r0, tdep->r0->num, 0)));
|
&& (! (src & 0x80) || pv_is_register_k (st->r0, tdep->r0->num, 0)));
|
}
|
}
|
|
|
|
|
/* Function for finding saved registers in a 'struct pv_area'; we pass
|
/* Function for finding saved registers in a 'struct pv_area'; we pass
|
this to pv_area_scan.
|
this to pv_area_scan.
|
|
|
If VALUE is a saved register, ADDR says it was saved at a constant
|
If VALUE is a saved register, ADDR says it was saved at a constant
|
offset from the frame base, and SIZE indicates that the whole
|
offset from the frame base, and SIZE indicates that the whole
|
register was saved, record its offset in RESULT_UNTYPED. */
|
register was saved, record its offset in RESULT_UNTYPED. */
|
static void
|
static void
|
check_for_saved (void *prologue_untyped, pv_t addr, CORE_ADDR size, pv_t value)
|
check_for_saved (void *prologue_untyped, pv_t addr, CORE_ADDR size, pv_t value)
|
{
|
{
|
struct m32c_prologue *prologue = (struct m32c_prologue *) prologue_untyped;
|
struct m32c_prologue *prologue = (struct m32c_prologue *) prologue_untyped;
|
struct gdbarch *arch = prologue->arch;
|
struct gdbarch *arch = prologue->arch;
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
|
|
/* Is this the unchanged value of some register being saved on the
|
/* Is this the unchanged value of some register being saved on the
|
stack? */
|
stack? */
|
if (value.kind == pvk_register
|
if (value.kind == pvk_register
|
&& value.k == 0
|
&& value.k == 0
|
&& pv_is_register (addr, tdep->sp->num))
|
&& pv_is_register (addr, tdep->sp->num))
|
{
|
{
|
/* Some registers require special handling: they're saved as a
|
/* Some registers require special handling: they're saved as a
|
larger value than the register itself. */
|
larger value than the register itself. */
|
CORE_ADDR saved_size = register_size (arch, value.reg);
|
CORE_ADDR saved_size = register_size (arch, value.reg);
|
|
|
if (value.reg == tdep->pc->num)
|
if (value.reg == tdep->pc->num)
|
saved_size = tdep->ret_addr_bytes;
|
saved_size = tdep->ret_addr_bytes;
|
else if (register_type (arch, value.reg)
|
else if (register_type (arch, value.reg)
|
== tdep->data_addr_reg_type)
|
== tdep->data_addr_reg_type)
|
saved_size = tdep->push_addr_bytes;
|
saved_size = tdep->push_addr_bytes;
|
|
|
if (size == saved_size)
|
if (size == saved_size)
|
{
|
{
|
/* Find which end of the saved value corresponds to our
|
/* Find which end of the saved value corresponds to our
|
register. */
|
register. */
|
if (gdbarch_byte_order (arch) == BFD_ENDIAN_BIG)
|
if (gdbarch_byte_order (arch) == BFD_ENDIAN_BIG)
|
prologue->reg_offset[value.reg]
|
prologue->reg_offset[value.reg]
|
= (addr.k + saved_size - register_size (arch, value.reg));
|
= (addr.k + saved_size - register_size (arch, value.reg));
|
else
|
else
|
prologue->reg_offset[value.reg] = addr.k;
|
prologue->reg_offset[value.reg] = addr.k;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
|
|
/* Analyze the function prologue for ARCH at START, going no further
|
/* Analyze the function prologue for ARCH at START, going no further
|
than LIMIT, and place a description of what we found in
|
than LIMIT, and place a description of what we found in
|
PROLOGUE. */
|
PROLOGUE. */
|
static void
|
static void
|
m32c_analyze_prologue (struct gdbarch *arch,
|
m32c_analyze_prologue (struct gdbarch *arch,
|
CORE_ADDR start, CORE_ADDR limit,
|
CORE_ADDR start, CORE_ADDR limit,
|
struct m32c_prologue *prologue)
|
struct m32c_prologue *prologue)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
unsigned long mach = gdbarch_bfd_arch_info (arch)->mach;
|
unsigned long mach = gdbarch_bfd_arch_info (arch)->mach;
|
CORE_ADDR after_last_frame_related_insn;
|
CORE_ADDR after_last_frame_related_insn;
|
struct cleanup *back_to;
|
struct cleanup *back_to;
|
struct m32c_pv_state st;
|
struct m32c_pv_state st;
|
|
|
st.arch = arch;
|
st.arch = arch;
|
st.r0 = pv_register (tdep->r0->num, 0);
|
st.r0 = pv_register (tdep->r0->num, 0);
|
st.r1 = pv_register (tdep->r1->num, 0);
|
st.r1 = pv_register (tdep->r1->num, 0);
|
st.r2 = pv_register (tdep->r2->num, 0);
|
st.r2 = pv_register (tdep->r2->num, 0);
|
st.r3 = pv_register (tdep->r3->num, 0);
|
st.r3 = pv_register (tdep->r3->num, 0);
|
st.a0 = pv_register (tdep->a0->num, 0);
|
st.a0 = pv_register (tdep->a0->num, 0);
|
st.a1 = pv_register (tdep->a1->num, 0);
|
st.a1 = pv_register (tdep->a1->num, 0);
|
st.sb = pv_register (tdep->sb->num, 0);
|
st.sb = pv_register (tdep->sb->num, 0);
|
st.fb = pv_register (tdep->fb->num, 0);
|
st.fb = pv_register (tdep->fb->num, 0);
|
st.sp = pv_register (tdep->sp->num, 0);
|
st.sp = pv_register (tdep->sp->num, 0);
|
st.pc = pv_register (tdep->pc->num, 0);
|
st.pc = pv_register (tdep->pc->num, 0);
|
st.stack = make_pv_area (tdep->sp->num, gdbarch_addr_bit (arch));
|
st.stack = make_pv_area (tdep->sp->num, gdbarch_addr_bit (arch));
|
back_to = make_cleanup_free_pv_area (st.stack);
|
back_to = make_cleanup_free_pv_area (st.stack);
|
|
|
/* Record that the call instruction has saved the return address on
|
/* Record that the call instruction has saved the return address on
|
the stack. */
|
the stack. */
|
m32c_pv_push (&st, st.pc, tdep->ret_addr_bytes);
|
m32c_pv_push (&st, st.pc, tdep->ret_addr_bytes);
|
|
|
memset (prologue, 0, sizeof (*prologue));
|
memset (prologue, 0, sizeof (*prologue));
|
prologue->arch = arch;
|
prologue->arch = arch;
|
{
|
{
|
int i;
|
int i;
|
for (i = 0; i < M32C_MAX_NUM_REGS; i++)
|
for (i = 0; i < M32C_MAX_NUM_REGS; i++)
|
prologue->reg_offset[i] = 1;
|
prologue->reg_offset[i] = 1;
|
}
|
}
|
|
|
st.scan_pc = after_last_frame_related_insn = start;
|
st.scan_pc = after_last_frame_related_insn = start;
|
|
|
while (st.scan_pc < limit)
|
while (st.scan_pc < limit)
|
{
|
{
|
pv_t pre_insn_fb = st.fb;
|
pv_t pre_insn_fb = st.fb;
|
pv_t pre_insn_sp = st.sp;
|
pv_t pre_insn_sp = st.sp;
|
|
|
/* In theory we could get in trouble by trying to read ahead
|
/* In theory we could get in trouble by trying to read ahead
|
here, when we only know we're expecting one byte. In
|
here, when we only know we're expecting one byte. In
|
practice I doubt anyone will care, and it makes the rest of
|
practice I doubt anyone will care, and it makes the rest of
|
the code easier. */
|
the code easier. */
|
if (target_read_memory (st.scan_pc, st.insn, sizeof (st.insn)))
|
if (target_read_memory (st.scan_pc, st.insn, sizeof (st.insn)))
|
/* If we can't fetch the instruction from memory, stop here
|
/* If we can't fetch the instruction from memory, stop here
|
and hope for the best. */
|
and hope for the best. */
|
break;
|
break;
|
st.next_addr = st.scan_pc;
|
st.next_addr = st.scan_pc;
|
|
|
/* The assembly instructions are written as they appear in the
|
/* The assembly instructions are written as they appear in the
|
section of the processor manuals that describe the
|
section of the processor manuals that describe the
|
instruction encodings.
|
instruction encodings.
|
|
|
When a single assembly language instruction has several
|
When a single assembly language instruction has several
|
different machine-language encodings, the manual
|
different machine-language encodings, the manual
|
distinguishes them by a number in parens, before the
|
distinguishes them by a number in parens, before the
|
mnemonic. Those numbers are included, as well.
|
mnemonic. Those numbers are included, as well.
|
|
|
The srcdest decoding instructions have the same names as the
|
The srcdest decoding instructions have the same names as the
|
analogous functions in the simulator. */
|
analogous functions in the simulator. */
|
if (mach == bfd_mach_m16c)
|
if (mach == bfd_mach_m16c)
|
{
|
{
|
/* (1) ENTER #imm8 */
|
/* (1) ENTER #imm8 */
|
if (st.insn[0] == 0x7c && st.insn[1] == 0xf2)
|
if (st.insn[0] == 0x7c && st.insn[1] == 0xf2)
|
{
|
{
|
if (m32c_pv_enter (&st, st.insn[2]))
|
if (m32c_pv_enter (&st, st.insn[2]))
|
break;
|
break;
|
st.next_addr += 3;
|
st.next_addr += 3;
|
}
|
}
|
/* (1) PUSHM src */
|
/* (1) PUSHM src */
|
else if (st.insn[0] == 0xec)
|
else if (st.insn[0] == 0xec)
|
{
|
{
|
int src = st.insn[1];
|
int src = st.insn[1];
|
if (m32c_pv_pushm (&st, src))
|
if (m32c_pv_pushm (&st, src))
|
break;
|
break;
|
st.next_addr += 2;
|
st.next_addr += 2;
|
|
|
if (m32c_pushm_is_reg_save (&st, src))
|
if (m32c_pushm_is_reg_save (&st, src))
|
after_last_frame_related_insn = st.next_addr;
|
after_last_frame_related_insn = st.next_addr;
|
}
|
}
|
|
|
/* (6) MOV.size:G src, dest */
|
/* (6) MOV.size:G src, dest */
|
else if ((st.insn[0] & 0xfe) == 0x72)
|
else if ((st.insn[0] & 0xfe) == 0x72)
|
{
|
{
|
int size = (st.insn[0] & 0x01) ? 2 : 1;
|
int size = (st.insn[0] & 0x01) ? 2 : 1;
|
struct srcdest src;
|
struct srcdest src;
|
struct srcdest dest;
|
struct srcdest dest;
|
pv_t src_value;
|
pv_t src_value;
|
st.next_addr += 2;
|
st.next_addr += 2;
|
|
|
src
|
src
|
= m32c_decode_srcdest4 (&st, (st.insn[1] >> 4) & 0xf, size);
|
= m32c_decode_srcdest4 (&st, (st.insn[1] >> 4) & 0xf, size);
|
dest
|
dest
|
= m32c_decode_srcdest4 (&st, st.insn[1] & 0xf, size);
|
= m32c_decode_srcdest4 (&st, st.insn[1] & 0xf, size);
|
src_value = m32c_srcdest_fetch (&st, src, size);
|
src_value = m32c_srcdest_fetch (&st, src, size);
|
|
|
if (m32c_is_arg_spill (&st, dest, src_value))
|
if (m32c_is_arg_spill (&st, dest, src_value))
|
after_last_frame_related_insn = st.next_addr;
|
after_last_frame_related_insn = st.next_addr;
|
else if (m32c_is_struct_return (&st, dest, src_value))
|
else if (m32c_is_struct_return (&st, dest, src_value))
|
after_last_frame_related_insn = st.next_addr;
|
after_last_frame_related_insn = st.next_addr;
|
|
|
if (m32c_srcdest_store (&st, dest, src_value, size))
|
if (m32c_srcdest_store (&st, dest, src_value, size))
|
break;
|
break;
|
}
|
}
|
|
|
/* (1) LDC #IMM16, sp */
|
/* (1) LDC #IMM16, sp */
|
else if (st.insn[0] == 0xeb
|
else if (st.insn[0] == 0xeb
|
&& st.insn[1] == 0x50)
|
&& st.insn[1] == 0x50)
|
{
|
{
|
st.next_addr += 2;
|
st.next_addr += 2;
|
st.sp = pv_constant (m32c_udisp16 (&st));
|
st.sp = pv_constant (m32c_udisp16 (&st));
|
}
|
}
|
|
|
else
|
else
|
/* We've hit some instruction we don't know how to simulate.
|
/* We've hit some instruction we don't know how to simulate.
|
Strictly speaking, we should set every value we're
|
Strictly speaking, we should set every value we're
|
tracking to "unknown". But we'll be optimistic, assume
|
tracking to "unknown". But we'll be optimistic, assume
|
that we have enough information already, and stop
|
that we have enough information already, and stop
|
analysis here. */
|
analysis here. */
|
break;
|
break;
|
}
|
}
|
else
|
else
|
{
|
{
|
int src_indirect = 0;
|
int src_indirect = 0;
|
int dest_indirect = 0;
|
int dest_indirect = 0;
|
int i = 0;
|
int i = 0;
|
|
|
gdb_assert (mach == bfd_mach_m32c);
|
gdb_assert (mach == bfd_mach_m32c);
|
|
|
/* Check for prefix bytes indicating indirect addressing. */
|
/* Check for prefix bytes indicating indirect addressing. */
|
if (st.insn[0] == 0x41)
|
if (st.insn[0] == 0x41)
|
{
|
{
|
src_indirect = 1;
|
src_indirect = 1;
|
i++;
|
i++;
|
}
|
}
|
else if (st.insn[0] == 0x09)
|
else if (st.insn[0] == 0x09)
|
{
|
{
|
dest_indirect = 1;
|
dest_indirect = 1;
|
i++;
|
i++;
|
}
|
}
|
else if (st.insn[0] == 0x49)
|
else if (st.insn[0] == 0x49)
|
{
|
{
|
src_indirect = dest_indirect = 1;
|
src_indirect = dest_indirect = 1;
|
i++;
|
i++;
|
}
|
}
|
|
|
/* (1) ENTER #imm8 */
|
/* (1) ENTER #imm8 */
|
if (st.insn[i] == 0xec)
|
if (st.insn[i] == 0xec)
|
{
|
{
|
if (m32c_pv_enter (&st, st.insn[i + 1]))
|
if (m32c_pv_enter (&st, st.insn[i + 1]))
|
break;
|
break;
|
st.next_addr += 2;
|
st.next_addr += 2;
|
}
|
}
|
|
|
/* (1) PUSHM src */
|
/* (1) PUSHM src */
|
else if (st.insn[i] == 0x8f)
|
else if (st.insn[i] == 0x8f)
|
{
|
{
|
int src = st.insn[i + 1];
|
int src = st.insn[i + 1];
|
if (m32c_pv_pushm (&st, src))
|
if (m32c_pv_pushm (&st, src))
|
break;
|
break;
|
st.next_addr += 2;
|
st.next_addr += 2;
|
|
|
if (m32c_pushm_is_reg_save (&st, src))
|
if (m32c_pushm_is_reg_save (&st, src))
|
after_last_frame_related_insn = st.next_addr;
|
after_last_frame_related_insn = st.next_addr;
|
}
|
}
|
|
|
/* (7) MOV.size:G src, dest */
|
/* (7) MOV.size:G src, dest */
|
else if ((st.insn[i] & 0x80) == 0x80
|
else if ((st.insn[i] & 0x80) == 0x80
|
&& (st.insn[i + 1] & 0x0f) == 0x0b
|
&& (st.insn[i + 1] & 0x0f) == 0x0b
|
&& m32c_get_src23 (&st.insn[i]) < 20
|
&& m32c_get_src23 (&st.insn[i]) < 20
|
&& m32c_get_dest23 (&st.insn[i]) < 20)
|
&& m32c_get_dest23 (&st.insn[i]) < 20)
|
{
|
{
|
struct srcdest src;
|
struct srcdest src;
|
struct srcdest dest;
|
struct srcdest dest;
|
pv_t src_value;
|
pv_t src_value;
|
int bw = st.insn[i] & 0x01;
|
int bw = st.insn[i] & 0x01;
|
int size = bw ? 2 : 1;
|
int size = bw ? 2 : 1;
|
st.next_addr += 2;
|
st.next_addr += 2;
|
|
|
src
|
src
|
= m32c_decode_sd23 (&st, m32c_get_src23 (&st.insn[i]),
|
= m32c_decode_sd23 (&st, m32c_get_src23 (&st.insn[i]),
|
size, src_indirect);
|
size, src_indirect);
|
dest
|
dest
|
= m32c_decode_sd23 (&st, m32c_get_dest23 (&st.insn[i]),
|
= m32c_decode_sd23 (&st, m32c_get_dest23 (&st.insn[i]),
|
size, dest_indirect);
|
size, dest_indirect);
|
src_value = m32c_srcdest_fetch (&st, src, size);
|
src_value = m32c_srcdest_fetch (&st, src, size);
|
|
|
if (m32c_is_arg_spill (&st, dest, src_value))
|
if (m32c_is_arg_spill (&st, dest, src_value))
|
after_last_frame_related_insn = st.next_addr;
|
after_last_frame_related_insn = st.next_addr;
|
|
|
if (m32c_srcdest_store (&st, dest, src_value, size))
|
if (m32c_srcdest_store (&st, dest, src_value, size))
|
break;
|
break;
|
}
|
}
|
/* (2) LDC #IMM24, sp */
|
/* (2) LDC #IMM24, sp */
|
else if (st.insn[i] == 0xd5
|
else if (st.insn[i] == 0xd5
|
&& st.insn[i + 1] == 0x29)
|
&& st.insn[i + 1] == 0x29)
|
{
|
{
|
st.next_addr += 2;
|
st.next_addr += 2;
|
st.sp = pv_constant (m32c_udisp24 (&st));
|
st.sp = pv_constant (m32c_udisp24 (&st));
|
}
|
}
|
else
|
else
|
/* We've hit some instruction we don't know how to simulate.
|
/* We've hit some instruction we don't know how to simulate.
|
Strictly speaking, we should set every value we're
|
Strictly speaking, we should set every value we're
|
tracking to "unknown". But we'll be optimistic, assume
|
tracking to "unknown". But we'll be optimistic, assume
|
that we have enough information already, and stop
|
that we have enough information already, and stop
|
analysis here. */
|
analysis here. */
|
break;
|
break;
|
}
|
}
|
|
|
/* If this instruction changed the FB or decreased the SP (i.e.,
|
/* If this instruction changed the FB or decreased the SP (i.e.,
|
allocated more stack space), then this may be a good place to
|
allocated more stack space), then this may be a good place to
|
declare the prologue finished. However, there are some
|
declare the prologue finished. However, there are some
|
exceptions:
|
exceptions:
|
|
|
- If the instruction just changed the FB back to its original
|
- If the instruction just changed the FB back to its original
|
value, then that's probably a restore instruction. The
|
value, then that's probably a restore instruction. The
|
prologue should definitely end before that.
|
prologue should definitely end before that.
|
|
|
- If the instruction increased the value of the SP (that is,
|
- If the instruction increased the value of the SP (that is,
|
shrunk the frame), then it's probably part of a frame
|
shrunk the frame), then it's probably part of a frame
|
teardown sequence, and the prologue should end before
|
teardown sequence, and the prologue should end before
|
that. */
|
that. */
|
|
|
if (! pv_is_identical (st.fb, pre_insn_fb))
|
if (! pv_is_identical (st.fb, pre_insn_fb))
|
{
|
{
|
if (! pv_is_register_k (st.fb, tdep->fb->num, 0))
|
if (! pv_is_register_k (st.fb, tdep->fb->num, 0))
|
after_last_frame_related_insn = st.next_addr;
|
after_last_frame_related_insn = st.next_addr;
|
}
|
}
|
else if (! pv_is_identical (st.sp, pre_insn_sp))
|
else if (! pv_is_identical (st.sp, pre_insn_sp))
|
{
|
{
|
/* The comparison of the constants looks odd, there, because
|
/* The comparison of the constants looks odd, there, because
|
.k is unsigned. All it really means is that the SP is
|
.k is unsigned. All it really means is that the SP is
|
lower than it was before the instruction. */
|
lower than it was before the instruction. */
|
if ( pv_is_register (pre_insn_sp, tdep->sp->num)
|
if ( pv_is_register (pre_insn_sp, tdep->sp->num)
|
&& pv_is_register (st.sp, tdep->sp->num)
|
&& pv_is_register (st.sp, tdep->sp->num)
|
&& ((pre_insn_sp.k - st.sp.k) < (st.sp.k - pre_insn_sp.k)))
|
&& ((pre_insn_sp.k - st.sp.k) < (st.sp.k - pre_insn_sp.k)))
|
after_last_frame_related_insn = st.next_addr;
|
after_last_frame_related_insn = st.next_addr;
|
}
|
}
|
|
|
st.scan_pc = st.next_addr;
|
st.scan_pc = st.next_addr;
|
}
|
}
|
|
|
/* Did we load a constant value into the stack pointer? */
|
/* Did we load a constant value into the stack pointer? */
|
if (pv_is_constant (st.sp))
|
if (pv_is_constant (st.sp))
|
prologue->kind = prologue_first_frame;
|
prologue->kind = prologue_first_frame;
|
|
|
/* Alternatively, did we initialize the frame pointer? Remember
|
/* Alternatively, did we initialize the frame pointer? Remember
|
that the CFA is the address after the return address. */
|
that the CFA is the address after the return address. */
|
if (pv_is_register (st.fb, tdep->sp->num))
|
if (pv_is_register (st.fb, tdep->sp->num))
|
{
|
{
|
prologue->kind = prologue_with_frame_ptr;
|
prologue->kind = prologue_with_frame_ptr;
|
prologue->frame_ptr_offset = st.fb.k;
|
prologue->frame_ptr_offset = st.fb.k;
|
}
|
}
|
|
|
/* Is the frame size a known constant? Remember that frame_size is
|
/* Is the frame size a known constant? Remember that frame_size is
|
actually the offset from the CFA to the SP (i.e., a negative
|
actually the offset from the CFA to the SP (i.e., a negative
|
value). */
|
value). */
|
else if (pv_is_register (st.sp, tdep->sp->num))
|
else if (pv_is_register (st.sp, tdep->sp->num))
|
{
|
{
|
prologue->kind = prologue_sans_frame_ptr;
|
prologue->kind = prologue_sans_frame_ptr;
|
prologue->frame_size = st.sp.k;
|
prologue->frame_size = st.sp.k;
|
}
|
}
|
|
|
/* We haven't been able to make sense of this function's frame. Treat
|
/* We haven't been able to make sense of this function's frame. Treat
|
it as the first frame. */
|
it as the first frame. */
|
else
|
else
|
prologue->kind = prologue_first_frame;
|
prologue->kind = prologue_first_frame;
|
|
|
/* Record where all the registers were saved. */
|
/* Record where all the registers were saved. */
|
pv_area_scan (st.stack, check_for_saved, (void *) prologue);
|
pv_area_scan (st.stack, check_for_saved, (void *) prologue);
|
|
|
prologue->prologue_end = after_last_frame_related_insn;
|
prologue->prologue_end = after_last_frame_related_insn;
|
|
|
do_cleanups (back_to);
|
do_cleanups (back_to);
|
}
|
}
|
|
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
m32c_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR ip)
|
m32c_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR ip)
|
{
|
{
|
char *name;
|
char *name;
|
CORE_ADDR func_addr, func_end, sal_end;
|
CORE_ADDR func_addr, func_end, sal_end;
|
struct m32c_prologue p;
|
struct m32c_prologue p;
|
|
|
/* Try to find the extent of the function that contains IP. */
|
/* Try to find the extent of the function that contains IP. */
|
if (! find_pc_partial_function (ip, &name, &func_addr, &func_end))
|
if (! find_pc_partial_function (ip, &name, &func_addr, &func_end))
|
return ip;
|
return ip;
|
|
|
/* Find end by prologue analysis. */
|
/* Find end by prologue analysis. */
|
m32c_analyze_prologue (gdbarch, ip, func_end, &p);
|
m32c_analyze_prologue (gdbarch, ip, func_end, &p);
|
/* Find end by line info. */
|
/* Find end by line info. */
|
sal_end = skip_prologue_using_sal (gdbarch, ip);
|
sal_end = skip_prologue_using_sal (gdbarch, ip);
|
/* Return whichever is lower. */
|
/* Return whichever is lower. */
|
if (sal_end != 0 && sal_end != ip && sal_end < p.prologue_end)
|
if (sal_end != 0 && sal_end != ip && sal_end < p.prologue_end)
|
return sal_end;
|
return sal_end;
|
else
|
else
|
return p.prologue_end;
|
return p.prologue_end;
|
}
|
}
|
|
|
|
|
|
|
/* Stack unwinding. */
|
/* Stack unwinding. */
|
|
|
static struct m32c_prologue *
|
static struct m32c_prologue *
|
m32c_analyze_frame_prologue (struct frame_info *this_frame,
|
m32c_analyze_frame_prologue (struct frame_info *this_frame,
|
void **this_prologue_cache)
|
void **this_prologue_cache)
|
{
|
{
|
if (! *this_prologue_cache)
|
if (! *this_prologue_cache)
|
{
|
{
|
CORE_ADDR func_start = get_frame_func (this_frame);
|
CORE_ADDR func_start = get_frame_func (this_frame);
|
CORE_ADDR stop_addr = get_frame_pc (this_frame);
|
CORE_ADDR stop_addr = get_frame_pc (this_frame);
|
|
|
/* If we couldn't find any function containing the PC, then
|
/* If we couldn't find any function containing the PC, then
|
just initialize the prologue cache, but don't do anything. */
|
just initialize the prologue cache, but don't do anything. */
|
if (! func_start)
|
if (! func_start)
|
stop_addr = func_start;
|
stop_addr = func_start;
|
|
|
*this_prologue_cache = FRAME_OBSTACK_ZALLOC (struct m32c_prologue);
|
*this_prologue_cache = FRAME_OBSTACK_ZALLOC (struct m32c_prologue);
|
m32c_analyze_prologue (get_frame_arch (this_frame),
|
m32c_analyze_prologue (get_frame_arch (this_frame),
|
func_start, stop_addr, *this_prologue_cache);
|
func_start, stop_addr, *this_prologue_cache);
|
}
|
}
|
|
|
return *this_prologue_cache;
|
return *this_prologue_cache;
|
}
|
}
|
|
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
m32c_frame_base (struct frame_info *this_frame,
|
m32c_frame_base (struct frame_info *this_frame,
|
void **this_prologue_cache)
|
void **this_prologue_cache)
|
{
|
{
|
struct m32c_prologue *p
|
struct m32c_prologue *p
|
= m32c_analyze_frame_prologue (this_frame, this_prologue_cache);
|
= m32c_analyze_frame_prologue (this_frame, this_prologue_cache);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
|
struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
|
|
|
/* In functions that use alloca, the distance between the stack
|
/* In functions that use alloca, the distance between the stack
|
pointer and the frame base varies dynamically, so we can't use
|
pointer and the frame base varies dynamically, so we can't use
|
the SP plus static information like prologue analysis to find the
|
the SP plus static information like prologue analysis to find the
|
frame base. However, such functions must have a frame pointer,
|
frame base. However, such functions must have a frame pointer,
|
to be able to restore the SP on exit. So whenever we do have a
|
to be able to restore the SP on exit. So whenever we do have a
|
frame pointer, use that to find the base. */
|
frame pointer, use that to find the base. */
|
switch (p->kind)
|
switch (p->kind)
|
{
|
{
|
case prologue_with_frame_ptr:
|
case prologue_with_frame_ptr:
|
{
|
{
|
CORE_ADDR fb
|
CORE_ADDR fb
|
= get_frame_register_unsigned (this_frame, tdep->fb->num);
|
= get_frame_register_unsigned (this_frame, tdep->fb->num);
|
return fb - p->frame_ptr_offset;
|
return fb - p->frame_ptr_offset;
|
}
|
}
|
|
|
case prologue_sans_frame_ptr:
|
case prologue_sans_frame_ptr:
|
{
|
{
|
CORE_ADDR sp
|
CORE_ADDR sp
|
= get_frame_register_unsigned (this_frame, tdep->sp->num);
|
= get_frame_register_unsigned (this_frame, tdep->sp->num);
|
return sp - p->frame_size;
|
return sp - p->frame_size;
|
}
|
}
|
|
|
case prologue_first_frame:
|
case prologue_first_frame:
|
return 0;
|
return 0;
|
|
|
default:
|
default:
|
gdb_assert (0);
|
gdb_assert (0);
|
}
|
}
|
}
|
}
|
|
|
|
|
static void
|
static void
|
m32c_this_id (struct frame_info *this_frame,
|
m32c_this_id (struct frame_info *this_frame,
|
void **this_prologue_cache,
|
void **this_prologue_cache,
|
struct frame_id *this_id)
|
struct frame_id *this_id)
|
{
|
{
|
CORE_ADDR base = m32c_frame_base (this_frame, this_prologue_cache);
|
CORE_ADDR base = m32c_frame_base (this_frame, this_prologue_cache);
|
|
|
if (base)
|
if (base)
|
*this_id = frame_id_build (base, get_frame_func (this_frame));
|
*this_id = frame_id_build (base, get_frame_func (this_frame));
|
/* Otherwise, leave it unset, and that will terminate the backtrace. */
|
/* Otherwise, leave it unset, and that will terminate the backtrace. */
|
}
|
}
|
|
|
|
|
static struct value *
|
static struct value *
|
m32c_prev_register (struct frame_info *this_frame,
|
m32c_prev_register (struct frame_info *this_frame,
|
void **this_prologue_cache, int regnum)
|
void **this_prologue_cache, int regnum)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
|
struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
|
struct m32c_prologue *p
|
struct m32c_prologue *p
|
= m32c_analyze_frame_prologue (this_frame, this_prologue_cache);
|
= m32c_analyze_frame_prologue (this_frame, this_prologue_cache);
|
CORE_ADDR frame_base = m32c_frame_base (this_frame, this_prologue_cache);
|
CORE_ADDR frame_base = m32c_frame_base (this_frame, this_prologue_cache);
|
int reg_size = register_size (get_frame_arch (this_frame), regnum);
|
int reg_size = register_size (get_frame_arch (this_frame), regnum);
|
|
|
if (regnum == tdep->sp->num)
|
if (regnum == tdep->sp->num)
|
return frame_unwind_got_constant (this_frame, regnum, frame_base);
|
return frame_unwind_got_constant (this_frame, regnum, frame_base);
|
|
|
/* If prologue analysis says we saved this register somewhere,
|
/* If prologue analysis says we saved this register somewhere,
|
return a description of the stack slot holding it. */
|
return a description of the stack slot holding it. */
|
if (p->reg_offset[regnum] != 1)
|
if (p->reg_offset[regnum] != 1)
|
return frame_unwind_got_memory (this_frame, regnum,
|
return frame_unwind_got_memory (this_frame, regnum,
|
frame_base + p->reg_offset[regnum]);
|
frame_base + p->reg_offset[regnum]);
|
|
|
/* Otherwise, presume we haven't changed the value of this
|
/* Otherwise, presume we haven't changed the value of this
|
register, and get it from the next frame. */
|
register, and get it from the next frame. */
|
return frame_unwind_got_register (this_frame, regnum, regnum);
|
return frame_unwind_got_register (this_frame, regnum, regnum);
|
}
|
}
|
|
|
|
|
static const struct frame_unwind m32c_unwind = {
|
static const struct frame_unwind m32c_unwind = {
|
NORMAL_FRAME,
|
NORMAL_FRAME,
|
m32c_this_id,
|
m32c_this_id,
|
m32c_prev_register,
|
m32c_prev_register,
|
NULL,
|
NULL,
|
default_frame_sniffer
|
default_frame_sniffer
|
};
|
};
|
|
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
m32c_unwind_pc (struct gdbarch *arch, struct frame_info *next_frame)
|
m32c_unwind_pc (struct gdbarch *arch, struct frame_info *next_frame)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
return frame_unwind_register_unsigned (next_frame, tdep->pc->num);
|
return frame_unwind_register_unsigned (next_frame, tdep->pc->num);
|
}
|
}
|
|
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
m32c_unwind_sp (struct gdbarch *arch, struct frame_info *next_frame)
|
m32c_unwind_sp (struct gdbarch *arch, struct frame_info *next_frame)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
|
return frame_unwind_register_unsigned (next_frame, tdep->sp->num);
|
return frame_unwind_register_unsigned (next_frame, tdep->sp->num);
|
}
|
}
|
|
|
|
|
/* Inferior calls. */
|
/* Inferior calls. */
|
|
|
/* The calling conventions, according to GCC:
|
/* The calling conventions, according to GCC:
|
|
|
r8c, m16c
|
r8c, m16c
|
---------
|
---------
|
First arg may be passed in r1l or r1 if it (1) fits (QImode or
|
First arg may be passed in r1l or r1 if it (1) fits (QImode or
|
HImode), (2) is named, and (3) is an integer or pointer type (no
|
HImode), (2) is named, and (3) is an integer or pointer type (no
|
structs, floats, etc). Otherwise, it's passed on the stack.
|
structs, floats, etc). Otherwise, it's passed on the stack.
|
|
|
Second arg may be passed in r2, same restrictions (but not QImode),
|
Second arg may be passed in r2, same restrictions (but not QImode),
|
even if the first arg is passed on the stack.
|
even if the first arg is passed on the stack.
|
|
|
Third and further args are passed on the stack. No padding is
|
Third and further args are passed on the stack. No padding is
|
used, stack "alignment" is 8 bits.
|
used, stack "alignment" is 8 bits.
|
|
|
m32cm, m32c
|
m32cm, m32c
|
-----------
|
-----------
|
|
|
First arg may be passed in r0l or r0, same restrictions as above.
|
First arg may be passed in r0l or r0, same restrictions as above.
|
|
|
Second and further args are passed on the stack. Padding is used
|
Second and further args are passed on the stack. Padding is used
|
after QImode parameters (i.e. lower-addressed byte is the value,
|
after QImode parameters (i.e. lower-addressed byte is the value,
|
higher-addressed byte is the padding), stack "alignment" is 16
|
higher-addressed byte is the padding), stack "alignment" is 16
|
bits. */
|
bits. */
|
|
|
|
|
/* Return true if TYPE is a type that can be passed in registers. (We
|
/* Return true if TYPE is a type that can be passed in registers. (We
|
ignore the size, and pay attention only to the type code;
|
ignore the size, and pay attention only to the type code;
|
acceptable sizes depends on which register is being considered to
|
acceptable sizes depends on which register is being considered to
|
hold it.) */
|
hold it.) */
|
static int
|
static int
|
m32c_reg_arg_type (struct type *type)
|
m32c_reg_arg_type (struct type *type)
|
{
|
{
|
enum type_code code = TYPE_CODE (type);
|
enum type_code code = TYPE_CODE (type);
|
|
|
return (code == TYPE_CODE_INT
|
return (code == TYPE_CODE_INT
|
|| code == TYPE_CODE_ENUM
|
|| code == TYPE_CODE_ENUM
|
|| code == TYPE_CODE_PTR
|
|| code == TYPE_CODE_PTR
|
|| code == TYPE_CODE_REF
|
|| code == TYPE_CODE_REF
|
|| code == TYPE_CODE_BOOL
|
|| code == TYPE_CODE_BOOL
|
|| code == TYPE_CODE_CHAR);
|
|| code == TYPE_CODE_CHAR);
|
}
|
}
|
|
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
m32c_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
|
m32c_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
|
struct regcache *regcache, CORE_ADDR bp_addr, int nargs,
|
struct regcache *regcache, CORE_ADDR bp_addr, int nargs,
|
struct value **args, CORE_ADDR sp, int struct_return,
|
struct value **args, CORE_ADDR sp, int struct_return,
|
CORE_ADDR struct_addr)
|
CORE_ADDR struct_addr)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
unsigned long mach = gdbarch_bfd_arch_info (gdbarch)->mach;
|
unsigned long mach = gdbarch_bfd_arch_info (gdbarch)->mach;
|
CORE_ADDR cfa;
|
CORE_ADDR cfa;
|
int i;
|
int i;
|
|
|
/* The number of arguments given in this function's prototype, or
|
/* The number of arguments given in this function's prototype, or
|
zero if it has a non-prototyped function type. The m32c ABI
|
zero if it has a non-prototyped function type. The m32c ABI
|
passes arguments mentioned in the prototype differently from
|
passes arguments mentioned in the prototype differently from
|
those in the ellipsis of a varargs function, or from those passed
|
those in the ellipsis of a varargs function, or from those passed
|
to a non-prototyped function. */
|
to a non-prototyped function. */
|
int num_prototyped_args = 0;
|
int num_prototyped_args = 0;
|
|
|
{
|
{
|
struct type *func_type = value_type (function);
|
struct type *func_type = value_type (function);
|
|
|
/* Dereference function pointer types. */
|
/* Dereference function pointer types. */
|
if (TYPE_CODE (func_type) == TYPE_CODE_PTR)
|
if (TYPE_CODE (func_type) == TYPE_CODE_PTR)
|
func_type = TYPE_TARGET_TYPE (func_type);
|
func_type = TYPE_TARGET_TYPE (func_type);
|
|
|
gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC ||
|
gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC ||
|
TYPE_CODE (func_type) == TYPE_CODE_METHOD);
|
TYPE_CODE (func_type) == TYPE_CODE_METHOD);
|
|
|
#if 0
|
#if 0
|
/* The ABI description in gcc/config/m32c/m32c.abi says that
|
/* The ABI description in gcc/config/m32c/m32c.abi says that
|
we need to handle prototyped and non-prototyped functions
|
we need to handle prototyped and non-prototyped functions
|
separately, but the code in GCC doesn't actually do so. */
|
separately, but the code in GCC doesn't actually do so. */
|
if (TYPE_PROTOTYPED (func_type))
|
if (TYPE_PROTOTYPED (func_type))
|
#endif
|
#endif
|
num_prototyped_args = TYPE_NFIELDS (func_type);
|
num_prototyped_args = TYPE_NFIELDS (func_type);
|
}
|
}
|
|
|
/* First, if the function returns an aggregate by value, push a
|
/* First, if the function returns an aggregate by value, push a
|
pointer to a buffer for it. This doesn't affect the way
|
pointer to a buffer for it. This doesn't affect the way
|
subsequent arguments are allocated to registers. */
|
subsequent arguments are allocated to registers. */
|
if (struct_return)
|
if (struct_return)
|
{
|
{
|
int ptr_len = TYPE_LENGTH (tdep->ptr_voyd);
|
int ptr_len = TYPE_LENGTH (tdep->ptr_voyd);
|
sp -= ptr_len;
|
sp -= ptr_len;
|
write_memory_unsigned_integer (sp, ptr_len, byte_order, struct_addr);
|
write_memory_unsigned_integer (sp, ptr_len, byte_order, struct_addr);
|
}
|
}
|
|
|
/* Push the arguments. */
|
/* Push the arguments. */
|
for (i = nargs - 1; i >= 0; i--)
|
for (i = nargs - 1; i >= 0; i--)
|
{
|
{
|
struct value *arg = args[i];
|
struct value *arg = args[i];
|
const gdb_byte *arg_bits = value_contents (arg);
|
const gdb_byte *arg_bits = value_contents (arg);
|
struct type *arg_type = value_type (arg);
|
struct type *arg_type = value_type (arg);
|
ULONGEST arg_size = TYPE_LENGTH (arg_type);
|
ULONGEST arg_size = TYPE_LENGTH (arg_type);
|
|
|
/* Can it go in r1 or r1l (for m16c) or r0 or r0l (for m32c)? */
|
/* Can it go in r1 or r1l (for m16c) or r0 or r0l (for m32c)? */
|
if (i == 0
|
if (i == 0
|
&& arg_size <= 2
|
&& arg_size <= 2
|
&& i < num_prototyped_args
|
&& i < num_prototyped_args
|
&& m32c_reg_arg_type (arg_type))
|
&& m32c_reg_arg_type (arg_type))
|
{
|
{
|
/* Extract and re-store as an integer as a terse way to make
|
/* Extract and re-store as an integer as a terse way to make
|
sure it ends up in the least significant end of r1. (GDB
|
sure it ends up in the least significant end of r1. (GDB
|
should avoid assuming endianness, even on uni-endian
|
should avoid assuming endianness, even on uni-endian
|
processors.) */
|
processors.) */
|
ULONGEST u = extract_unsigned_integer (arg_bits, arg_size,
|
ULONGEST u = extract_unsigned_integer (arg_bits, arg_size,
|
byte_order);
|
byte_order);
|
struct m32c_reg *reg = (mach == bfd_mach_m16c) ? tdep->r1 : tdep->r0;
|
struct m32c_reg *reg = (mach == bfd_mach_m16c) ? tdep->r1 : tdep->r0;
|
regcache_cooked_write_unsigned (regcache, reg->num, u);
|
regcache_cooked_write_unsigned (regcache, reg->num, u);
|
}
|
}
|
|
|
/* Can it go in r2? */
|
/* Can it go in r2? */
|
else if (mach == bfd_mach_m16c
|
else if (mach == bfd_mach_m16c
|
&& i == 1
|
&& i == 1
|
&& arg_size == 2
|
&& arg_size == 2
|
&& i < num_prototyped_args
|
&& i < num_prototyped_args
|
&& m32c_reg_arg_type (arg_type))
|
&& m32c_reg_arg_type (arg_type))
|
regcache_cooked_write (regcache, tdep->r2->num, arg_bits);
|
regcache_cooked_write (regcache, tdep->r2->num, arg_bits);
|
|
|
/* Everything else goes on the stack. */
|
/* Everything else goes on the stack. */
|
else
|
else
|
{
|
{
|
sp -= arg_size;
|
sp -= arg_size;
|
|
|
/* Align the stack. */
|
/* Align the stack. */
|
if (mach == bfd_mach_m32c)
|
if (mach == bfd_mach_m32c)
|
sp &= ~1;
|
sp &= ~1;
|
|
|
write_memory (sp, arg_bits, arg_size);
|
write_memory (sp, arg_bits, arg_size);
|
}
|
}
|
}
|
}
|
|
|
/* This is the CFA we use to identify the dummy frame. */
|
/* This is the CFA we use to identify the dummy frame. */
|
cfa = sp;
|
cfa = sp;
|
|
|
/* Push the return address. */
|
/* Push the return address. */
|
sp -= tdep->ret_addr_bytes;
|
sp -= tdep->ret_addr_bytes;
|
write_memory_unsigned_integer (sp, tdep->ret_addr_bytes, byte_order,
|
write_memory_unsigned_integer (sp, tdep->ret_addr_bytes, byte_order,
|
bp_addr);
|
bp_addr);
|
|
|
/* Update the stack pointer. */
|
/* Update the stack pointer. */
|
regcache_cooked_write_unsigned (regcache, tdep->sp->num, sp);
|
regcache_cooked_write_unsigned (regcache, tdep->sp->num, sp);
|
|
|
/* We need to borrow an odd trick from the i386 target here.
|
/* We need to borrow an odd trick from the i386 target here.
|
|
|
The value we return from this function gets used as the stack
|
The value we return from this function gets used as the stack
|
address (the CFA) for the dummy frame's ID. The obvious thing is
|
address (the CFA) for the dummy frame's ID. The obvious thing is
|
to return the new TOS. However, that points at the return
|
to return the new TOS. However, that points at the return
|
address, saved on the stack, which is inconsistent with the CFA's
|
address, saved on the stack, which is inconsistent with the CFA's
|
described by GCC's DWARF 2 .debug_frame information: DWARF 2
|
described by GCC's DWARF 2 .debug_frame information: DWARF 2
|
.debug_frame info uses the address immediately after the saved
|
.debug_frame info uses the address immediately after the saved
|
return address. So you end up with a dummy frame whose CFA
|
return address. So you end up with a dummy frame whose CFA
|
points at the return address, but the frame for the function
|
points at the return address, but the frame for the function
|
being called has a CFA pointing after the return address: the
|
being called has a CFA pointing after the return address: the
|
younger CFA is *greater than* the older CFA. The sanity checks
|
younger CFA is *greater than* the older CFA. The sanity checks
|
in frame.c don't like that.
|
in frame.c don't like that.
|
|
|
So we try to be consistent with the CFA's used by DWARF 2.
|
So we try to be consistent with the CFA's used by DWARF 2.
|
Having a dummy frame and a real frame with the *same* CFA is
|
Having a dummy frame and a real frame with the *same* CFA is
|
tolerable. */
|
tolerable. */
|
return cfa;
|
return cfa;
|
}
|
}
|
|
|
|
|
static struct frame_id
|
static struct frame_id
|
m32c_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
|
m32c_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
|
{
|
{
|
/* This needs to return a frame ID whose PC is the return address
|
/* This needs to return a frame ID whose PC is the return address
|
passed to m32c_push_dummy_call, and whose stack_addr is the SP
|
passed to m32c_push_dummy_call, and whose stack_addr is the SP
|
m32c_push_dummy_call returned.
|
m32c_push_dummy_call returned.
|
|
|
m32c_unwind_sp gives us the CFA, which is the value the SP had
|
m32c_unwind_sp gives us the CFA, which is the value the SP had
|
before the return address was pushed. */
|
before the return address was pushed. */
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
CORE_ADDR sp = get_frame_register_unsigned (this_frame, tdep->sp->num);
|
CORE_ADDR sp = get_frame_register_unsigned (this_frame, tdep->sp->num);
|
return frame_id_build (sp, get_frame_pc (this_frame));
|
return frame_id_build (sp, get_frame_pc (this_frame));
|
}
|
}
|
|
|
|
|
|
|
/* Return values. */
|
/* Return values. */
|
|
|
/* Return value conventions, according to GCC:
|
/* Return value conventions, according to GCC:
|
|
|
r8c, m16c
|
r8c, m16c
|
---------
|
---------
|
|
|
QImode in r0l
|
QImode in r0l
|
HImode in r0
|
HImode in r0
|
SImode in r2r0
|
SImode in r2r0
|
near pointer in r0
|
near pointer in r0
|
far pointer in r2r0
|
far pointer in r2r0
|
|
|
Aggregate values (regardless of size) are returned by pushing a
|
Aggregate values (regardless of size) are returned by pushing a
|
pointer to a temporary area on the stack after the args are pushed.
|
pointer to a temporary area on the stack after the args are pushed.
|
The function fills in this area with the value. Note that this
|
The function fills in this area with the value. Note that this
|
pointer on the stack does not affect how register arguments, if any,
|
pointer on the stack does not affect how register arguments, if any,
|
are configured.
|
are configured.
|
|
|
m32cm, m32c
|
m32cm, m32c
|
-----------
|
-----------
|
Same. */
|
Same. */
|
|
|
/* Return non-zero if values of type TYPE are returned by storing them
|
/* Return non-zero if values of type TYPE are returned by storing them
|
in a buffer whose address is passed on the stack, ahead of the
|
in a buffer whose address is passed on the stack, ahead of the
|
other arguments. */
|
other arguments. */
|
static int
|
static int
|
m32c_return_by_passed_buf (struct type *type)
|
m32c_return_by_passed_buf (struct type *type)
|
{
|
{
|
enum type_code code = TYPE_CODE (type);
|
enum type_code code = TYPE_CODE (type);
|
|
|
return (code == TYPE_CODE_STRUCT
|
return (code == TYPE_CODE_STRUCT
|
|| code == TYPE_CODE_UNION);
|
|| code == TYPE_CODE_UNION);
|
}
|
}
|
|
|
static enum return_value_convention
|
static enum return_value_convention
|
m32c_return_value (struct gdbarch *gdbarch,
|
m32c_return_value (struct gdbarch *gdbarch,
|
struct type *func_type,
|
struct type *func_type,
|
struct type *valtype,
|
struct type *valtype,
|
struct regcache *regcache,
|
struct regcache *regcache,
|
gdb_byte *readbuf,
|
gdb_byte *readbuf,
|
const gdb_byte *writebuf)
|
const gdb_byte *writebuf)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum return_value_convention conv;
|
enum return_value_convention conv;
|
ULONGEST valtype_len = TYPE_LENGTH (valtype);
|
ULONGEST valtype_len = TYPE_LENGTH (valtype);
|
|
|
if (m32c_return_by_passed_buf (valtype))
|
if (m32c_return_by_passed_buf (valtype))
|
conv = RETURN_VALUE_STRUCT_CONVENTION;
|
conv = RETURN_VALUE_STRUCT_CONVENTION;
|
else
|
else
|
conv = RETURN_VALUE_REGISTER_CONVENTION;
|
conv = RETURN_VALUE_REGISTER_CONVENTION;
|
|
|
if (readbuf)
|
if (readbuf)
|
{
|
{
|
/* We should never be called to find values being returned by
|
/* We should never be called to find values being returned by
|
RETURN_VALUE_STRUCT_CONVENTION. Those can't be located,
|
RETURN_VALUE_STRUCT_CONVENTION. Those can't be located,
|
unless we made the call ourselves. */
|
unless we made the call ourselves. */
|
gdb_assert (conv == RETURN_VALUE_REGISTER_CONVENTION);
|
gdb_assert (conv == RETURN_VALUE_REGISTER_CONVENTION);
|
|
|
gdb_assert (valtype_len <= 8);
|
gdb_assert (valtype_len <= 8);
|
|
|
/* Anything that fits in r0 is returned there. */
|
/* Anything that fits in r0 is returned there. */
|
if (valtype_len <= TYPE_LENGTH (tdep->r0->type))
|
if (valtype_len <= TYPE_LENGTH (tdep->r0->type))
|
{
|
{
|
ULONGEST u;
|
ULONGEST u;
|
regcache_cooked_read_unsigned (regcache, tdep->r0->num, &u);
|
regcache_cooked_read_unsigned (regcache, tdep->r0->num, &u);
|
store_unsigned_integer (readbuf, valtype_len, byte_order, u);
|
store_unsigned_integer (readbuf, valtype_len, byte_order, u);
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Everything else is passed in mem0, using as many bytes as
|
/* Everything else is passed in mem0, using as many bytes as
|
needed. This is not what the Renesas tools do, but it's
|
needed. This is not what the Renesas tools do, but it's
|
what GCC does at the moment. */
|
what GCC does at the moment. */
|
struct minimal_symbol *mem0
|
struct minimal_symbol *mem0
|
= lookup_minimal_symbol ("mem0", NULL, NULL);
|
= lookup_minimal_symbol ("mem0", NULL, NULL);
|
|
|
if (! mem0)
|
if (! mem0)
|
error ("The return value is stored in memory at 'mem0', "
|
error ("The return value is stored in memory at 'mem0', "
|
"but GDB cannot find\n"
|
"but GDB cannot find\n"
|
"its address.");
|
"its address.");
|
read_memory (SYMBOL_VALUE_ADDRESS (mem0), readbuf, valtype_len);
|
read_memory (SYMBOL_VALUE_ADDRESS (mem0), readbuf, valtype_len);
|
}
|
}
|
}
|
}
|
|
|
if (writebuf)
|
if (writebuf)
|
{
|
{
|
/* We should never be called to store values to be returned
|
/* We should never be called to store values to be returned
|
using RETURN_VALUE_STRUCT_CONVENTION. We have no way of
|
using RETURN_VALUE_STRUCT_CONVENTION. We have no way of
|
finding the buffer, unless we made the call ourselves. */
|
finding the buffer, unless we made the call ourselves. */
|
gdb_assert (conv == RETURN_VALUE_REGISTER_CONVENTION);
|
gdb_assert (conv == RETURN_VALUE_REGISTER_CONVENTION);
|
|
|
gdb_assert (valtype_len <= 8);
|
gdb_assert (valtype_len <= 8);
|
|
|
/* Anything that fits in r0 is returned there. */
|
/* Anything that fits in r0 is returned there. */
|
if (valtype_len <= TYPE_LENGTH (tdep->r0->type))
|
if (valtype_len <= TYPE_LENGTH (tdep->r0->type))
|
{
|
{
|
ULONGEST u = extract_unsigned_integer (writebuf, valtype_len,
|
ULONGEST u = extract_unsigned_integer (writebuf, valtype_len,
|
byte_order);
|
byte_order);
|
regcache_cooked_write_unsigned (regcache, tdep->r0->num, u);
|
regcache_cooked_write_unsigned (regcache, tdep->r0->num, u);
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Everything else is passed in mem0, using as many bytes as
|
/* Everything else is passed in mem0, using as many bytes as
|
needed. This is not what the Renesas tools do, but it's
|
needed. This is not what the Renesas tools do, but it's
|
what GCC does at the moment. */
|
what GCC does at the moment. */
|
struct minimal_symbol *mem0
|
struct minimal_symbol *mem0
|
= lookup_minimal_symbol ("mem0", NULL, NULL);
|
= lookup_minimal_symbol ("mem0", NULL, NULL);
|
|
|
if (! mem0)
|
if (! mem0)
|
error ("The return value is stored in memory at 'mem0', "
|
error ("The return value is stored in memory at 'mem0', "
|
"but GDB cannot find\n"
|
"but GDB cannot find\n"
|
" its address.");
|
" its address.");
|
write_memory (SYMBOL_VALUE_ADDRESS (mem0),
|
write_memory (SYMBOL_VALUE_ADDRESS (mem0),
|
(char *) writebuf, valtype_len);
|
(char *) writebuf, valtype_len);
|
}
|
}
|
}
|
}
|
|
|
return conv;
|
return conv;
|
}
|
}
|
|
|
|
|
|
|
/* Trampolines. */
|
/* Trampolines. */
|
|
|
/* The m16c and m32c use a trampoline function for indirect function
|
/* The m16c and m32c use a trampoline function for indirect function
|
calls. An indirect call looks like this:
|
calls. An indirect call looks like this:
|
|
|
... push arguments ...
|
... push arguments ...
|
... push target function address ...
|
... push target function address ...
|
jsr.a m32c_jsri16
|
jsr.a m32c_jsri16
|
|
|
The code for m32c_jsri16 looks like this:
|
The code for m32c_jsri16 looks like this:
|
|
|
m32c_jsri16:
|
m32c_jsri16:
|
|
|
# Save return address.
|
# Save return address.
|
pop.w m32c_jsri_ret
|
pop.w m32c_jsri_ret
|
pop.b m32c_jsri_ret+2
|
pop.b m32c_jsri_ret+2
|
|
|
# Store target function address.
|
# Store target function address.
|
pop.w m32c_jsri_addr
|
pop.w m32c_jsri_addr
|
|
|
# Re-push return address.
|
# Re-push return address.
|
push.b m32c_jsri_ret+2
|
push.b m32c_jsri_ret+2
|
push.w m32c_jsri_ret
|
push.w m32c_jsri_ret
|
|
|
# Call the target function.
|
# Call the target function.
|
jmpi.a m32c_jsri_addr
|
jmpi.a m32c_jsri_addr
|
|
|
Without further information, GDB will treat calls to m32c_jsri16
|
Without further information, GDB will treat calls to m32c_jsri16
|
like calls to any other function. Since m32c_jsri16 doesn't have
|
like calls to any other function. Since m32c_jsri16 doesn't have
|
debugging information, that normally means that GDB sets a step-
|
debugging information, that normally means that GDB sets a step-
|
resume breakpoint and lets the program continue --- which is not
|
resume breakpoint and lets the program continue --- which is not
|
what the user wanted. (Giving the trampoline debugging info
|
what the user wanted. (Giving the trampoline debugging info
|
doesn't help: the user expects the program to stop in the function
|
doesn't help: the user expects the program to stop in the function
|
their program is calling, not in some trampoline code they've never
|
their program is calling, not in some trampoline code they've never
|
seen before.)
|
seen before.)
|
|
|
The gdbarch_skip_trampoline_code method tells GDB how to step
|
The gdbarch_skip_trampoline_code method tells GDB how to step
|
through such trampoline functions transparently to the user. When
|
through such trampoline functions transparently to the user. When
|
given the address of a trampoline function's first instruction,
|
given the address of a trampoline function's first instruction,
|
gdbarch_skip_trampoline_code should return the address of the first
|
gdbarch_skip_trampoline_code should return the address of the first
|
instruction of the function really being called. If GDB decides it
|
instruction of the function really being called. If GDB decides it
|
wants to step into that function, it will set a breakpoint there
|
wants to step into that function, it will set a breakpoint there
|
and silently continue to it.
|
and silently continue to it.
|
|
|
We recognize the trampoline by name, and extract the target address
|
We recognize the trampoline by name, and extract the target address
|
directly from the stack. This isn't great, but recognizing by its
|
directly from the stack. This isn't great, but recognizing by its
|
code sequence seems more fragile. */
|
code sequence seems more fragile. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
m32c_skip_trampoline_code (struct frame_info *frame, CORE_ADDR stop_pc)
|
m32c_skip_trampoline_code (struct frame_info *frame, CORE_ADDR stop_pc)
|
{
|
{
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
/* It would be nicer to simply look up the addresses of known
|
/* It would be nicer to simply look up the addresses of known
|
trampolines once, and then compare stop_pc with them. However,
|
trampolines once, and then compare stop_pc with them. However,
|
we'd need to ensure that that cached address got invalidated when
|
we'd need to ensure that that cached address got invalidated when
|
someone loaded a new executable, and I'm not quite sure of the
|
someone loaded a new executable, and I'm not quite sure of the
|
best way to do that. find_pc_partial_function does do some
|
best way to do that. find_pc_partial_function does do some
|
caching, so we'll see how this goes. */
|
caching, so we'll see how this goes. */
|
char *name;
|
char *name;
|
CORE_ADDR start, end;
|
CORE_ADDR start, end;
|
|
|
if (find_pc_partial_function (stop_pc, &name, &start, &end))
|
if (find_pc_partial_function (stop_pc, &name, &start, &end))
|
{
|
{
|
/* Are we stopped at the beginning of the trampoline function? */
|
/* Are we stopped at the beginning of the trampoline function? */
|
if (strcmp (name, "m32c_jsri16") == 0
|
if (strcmp (name, "m32c_jsri16") == 0
|
&& stop_pc == start)
|
&& stop_pc == start)
|
{
|
{
|
/* Get the stack pointer. The return address is at the top,
|
/* Get the stack pointer. The return address is at the top,
|
and the target function's address is just below that. We
|
and the target function's address is just below that. We
|
know it's a two-byte address, since the trampoline is
|
know it's a two-byte address, since the trampoline is
|
m32c_jsri*16*. */
|
m32c_jsri*16*. */
|
CORE_ADDR sp = get_frame_sp (get_current_frame ());
|
CORE_ADDR sp = get_frame_sp (get_current_frame ());
|
CORE_ADDR target
|
CORE_ADDR target
|
= read_memory_unsigned_integer (sp + tdep->ret_addr_bytes,
|
= read_memory_unsigned_integer (sp + tdep->ret_addr_bytes,
|
2, byte_order);
|
2, byte_order);
|
|
|
/* What we have now is the address of a jump instruction.
|
/* What we have now is the address of a jump instruction.
|
What we need is the destination of that jump.
|
What we need is the destination of that jump.
|
The opcode is 1 byte, and the destination is the next 3 bytes.
|
The opcode is 1 byte, and the destination is the next 3 bytes.
|
*/
|
*/
|
target = read_memory_unsigned_integer (target + 1, 3, byte_order);
|
target = read_memory_unsigned_integer (target + 1, 3, byte_order);
|
return target;
|
return target;
|
}
|
}
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
/* Address/pointer conversions. */
|
/* Address/pointer conversions. */
|
|
|
/* On the m16c, there is a 24-bit address space, but only a very few
|
/* On the m16c, there is a 24-bit address space, but only a very few
|
instructions can generate addresses larger than 0xffff: jumps,
|
instructions can generate addresses larger than 0xffff: jumps,
|
jumps to subroutines, and the lde/std (load/store extended)
|
jumps to subroutines, and the lde/std (load/store extended)
|
instructions.
|
instructions.
|
|
|
Since GCC can only support one size of pointer, we can't have
|
Since GCC can only support one size of pointer, we can't have
|
distinct 'near' and 'far' pointer types; we have to pick one size
|
distinct 'near' and 'far' pointer types; we have to pick one size
|
for everything. If we wanted to use 24-bit pointers, then GCC
|
for everything. If we wanted to use 24-bit pointers, then GCC
|
would have to use lde and ste for all memory references, which
|
would have to use lde and ste for all memory references, which
|
would be terrible for performance and code size. So the GNU
|
would be terrible for performance and code size. So the GNU
|
toolchain uses 16-bit pointers for everything, and gives up the
|
toolchain uses 16-bit pointers for everything, and gives up the
|
ability to have pointers point outside the first 64k of memory.
|
ability to have pointers point outside the first 64k of memory.
|
|
|
However, as a special hack, we let the linker place functions at
|
However, as a special hack, we let the linker place functions at
|
addresses above 0xffff, as long as it also places a trampoline in
|
addresses above 0xffff, as long as it also places a trampoline in
|
the low 64k for every function whose address is taken. Each
|
the low 64k for every function whose address is taken. Each
|
trampoline consists of a single jmp.a instruction that jumps to the
|
trampoline consists of a single jmp.a instruction that jumps to the
|
function's real entry point. Pointers to functions can be 16 bits
|
function's real entry point. Pointers to functions can be 16 bits
|
long, even though the functions themselves are at higher addresses:
|
long, even though the functions themselves are at higher addresses:
|
the pointers refer to the trampolines, not the functions.
|
the pointers refer to the trampolines, not the functions.
|
|
|
This complicates things for GDB, however: given the address of a
|
This complicates things for GDB, however: given the address of a
|
function (from debug info or linker symbols, say) which could be
|
function (from debug info or linker symbols, say) which could be
|
anywhere in the 24-bit address space, how can we find an
|
anywhere in the 24-bit address space, how can we find an
|
appropriate 16-bit value to use as a pointer to it?
|
appropriate 16-bit value to use as a pointer to it?
|
|
|
If the linker has not generated a trampoline for the function,
|
If the linker has not generated a trampoline for the function,
|
we're out of luck. Well, I guess we could malloc some space and
|
we're out of luck. Well, I guess we could malloc some space and
|
write a jmp.a instruction to it, but I'm not going to get into that
|
write a jmp.a instruction to it, but I'm not going to get into that
|
at the moment.
|
at the moment.
|
|
|
If the linker has generated a trampoline for the function, then it
|
If the linker has generated a trampoline for the function, then it
|
also emitted a symbol for the trampoline: if the function's linker
|
also emitted a symbol for the trampoline: if the function's linker
|
symbol is named NAME, then the function's trampoline's linker
|
symbol is named NAME, then the function's trampoline's linker
|
symbol is named NAME.plt.
|
symbol is named NAME.plt.
|
|
|
So, given a code address:
|
So, given a code address:
|
- We try to find a linker symbol at that address.
|
- We try to find a linker symbol at that address.
|
- If we find such a symbol named NAME, we look for a linker symbol
|
- If we find such a symbol named NAME, we look for a linker symbol
|
named NAME.plt.
|
named NAME.plt.
|
- If we find such a symbol, we assume it is a trampoline, and use
|
- If we find such a symbol, we assume it is a trampoline, and use
|
its address as the pointer value.
|
its address as the pointer value.
|
|
|
And, given a function pointer:
|
And, given a function pointer:
|
- We try to find a linker symbol at that address named NAME.plt.
|
- We try to find a linker symbol at that address named NAME.plt.
|
- If we find such a symbol, we look for a linker symbol named NAME.
|
- If we find such a symbol, we look for a linker symbol named NAME.
|
- If we find that, we provide that as the function's address.
|
- If we find that, we provide that as the function's address.
|
- If any of the above steps fail, we return the original address
|
- If any of the above steps fail, we return the original address
|
unchanged; it might really be a function in the low 64k.
|
unchanged; it might really be a function in the low 64k.
|
|
|
See? You *knew* there was a reason you wanted to be a computer
|
See? You *knew* there was a reason you wanted to be a computer
|
programmer! :) */
|
programmer! :) */
|
|
|
static void
|
static void
|
m32c_m16c_address_to_pointer (struct gdbarch *gdbarch,
|
m32c_m16c_address_to_pointer (struct gdbarch *gdbarch,
|
struct type *type, gdb_byte *buf, CORE_ADDR addr)
|
struct type *type, gdb_byte *buf, CORE_ADDR addr)
|
{
|
{
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum type_code target_code;
|
enum type_code target_code;
|
gdb_assert (TYPE_CODE (type) == TYPE_CODE_PTR ||
|
gdb_assert (TYPE_CODE (type) == TYPE_CODE_PTR ||
|
TYPE_CODE (type) == TYPE_CODE_REF);
|
TYPE_CODE (type) == TYPE_CODE_REF);
|
|
|
target_code = TYPE_CODE (TYPE_TARGET_TYPE (type));
|
target_code = TYPE_CODE (TYPE_TARGET_TYPE (type));
|
|
|
if (target_code == TYPE_CODE_FUNC || target_code == TYPE_CODE_METHOD)
|
if (target_code == TYPE_CODE_FUNC || target_code == TYPE_CODE_METHOD)
|
{
|
{
|
char *func_name;
|
char *func_name;
|
char *tramp_name;
|
char *tramp_name;
|
struct minimal_symbol *tramp_msym;
|
struct minimal_symbol *tramp_msym;
|
|
|
/* Try to find a linker symbol at this address. */
|
/* Try to find a linker symbol at this address. */
|
struct minimal_symbol *func_msym = lookup_minimal_symbol_by_pc (addr);
|
struct minimal_symbol *func_msym = lookup_minimal_symbol_by_pc (addr);
|
|
|
if (! func_msym)
|
if (! func_msym)
|
error (_("Cannot convert code address %s to function pointer:\n"
|
error (_("Cannot convert code address %s to function pointer:\n"
|
"couldn't find a symbol at that address, to find trampoline."),
|
"couldn't find a symbol at that address, to find trampoline."),
|
paddress (gdbarch, addr));
|
paddress (gdbarch, addr));
|
|
|
func_name = SYMBOL_LINKAGE_NAME (func_msym);
|
func_name = SYMBOL_LINKAGE_NAME (func_msym);
|
tramp_name = xmalloc (strlen (func_name) + 5);
|
tramp_name = xmalloc (strlen (func_name) + 5);
|
strcpy (tramp_name, func_name);
|
strcpy (tramp_name, func_name);
|
strcat (tramp_name, ".plt");
|
strcat (tramp_name, ".plt");
|
|
|
/* Try to find a linker symbol for the trampoline. */
|
/* Try to find a linker symbol for the trampoline. */
|
tramp_msym = lookup_minimal_symbol (tramp_name, NULL, NULL);
|
tramp_msym = lookup_minimal_symbol (tramp_name, NULL, NULL);
|
|
|
/* We've either got another copy of the name now, or don't need
|
/* We've either got another copy of the name now, or don't need
|
the name any more. */
|
the name any more. */
|
xfree (tramp_name);
|
xfree (tramp_name);
|
|
|
if (! tramp_msym)
|
if (! tramp_msym)
|
{
|
{
|
CORE_ADDR ptrval;
|
CORE_ADDR ptrval;
|
|
|
/* No PLT entry found. Mask off the upper bits of the address
|
/* No PLT entry found. Mask off the upper bits of the address
|
to make a pointer. As noted in the warning to the user
|
to make a pointer. As noted in the warning to the user
|
below, this value might be useful if converted back into
|
below, this value might be useful if converted back into
|
an address by GDB, but will otherwise, almost certainly,
|
an address by GDB, but will otherwise, almost certainly,
|
be garbage.
|
be garbage.
|
|
|
Using this masked result does seem to be useful
|
Using this masked result does seem to be useful
|
in gdb.cp/cplusfuncs.exp in which ~40 FAILs turn into
|
in gdb.cp/cplusfuncs.exp in which ~40 FAILs turn into
|
PASSes. These results appear to be correct as well.
|
PASSes. These results appear to be correct as well.
|
|
|
We print a warning here so that the user can make a
|
We print a warning here so that the user can make a
|
determination about whether the result is useful or not. */
|
determination about whether the result is useful or not. */
|
ptrval = addr & 0xffff;
|
ptrval = addr & 0xffff;
|
|
|
warning (_("Cannot convert code address %s to function pointer:\n"
|
warning (_("Cannot convert code address %s to function pointer:\n"
|
"couldn't find trampoline named '%s.plt'.\n"
|
"couldn't find trampoline named '%s.plt'.\n"
|
"Returning pointer value %s instead; this may produce\n"
|
"Returning pointer value %s instead; this may produce\n"
|
"a useful result if converted back into an address by GDB,\n"
|
"a useful result if converted back into an address by GDB,\n"
|
"but will most likely not be useful otherwise.\n"),
|
"but will most likely not be useful otherwise.\n"),
|
paddress (gdbarch, addr), func_name,
|
paddress (gdbarch, addr), func_name,
|
paddress (gdbarch, ptrval));
|
paddress (gdbarch, ptrval));
|
|
|
addr = ptrval;
|
addr = ptrval;
|
|
|
}
|
}
|
else
|
else
|
{
|
{
|
/* The trampoline's address is our pointer. */
|
/* The trampoline's address is our pointer. */
|
addr = SYMBOL_VALUE_ADDRESS (tramp_msym);
|
addr = SYMBOL_VALUE_ADDRESS (tramp_msym);
|
}
|
}
|
}
|
}
|
|
|
store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order, addr);
|
store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order, addr);
|
}
|
}
|
|
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
m32c_m16c_pointer_to_address (struct gdbarch *gdbarch,
|
m32c_m16c_pointer_to_address (struct gdbarch *gdbarch,
|
struct type *type, const gdb_byte *buf)
|
struct type *type, const gdb_byte *buf)
|
{
|
{
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
CORE_ADDR ptr;
|
CORE_ADDR ptr;
|
enum type_code target_code;
|
enum type_code target_code;
|
|
|
gdb_assert (TYPE_CODE (type) == TYPE_CODE_PTR ||
|
gdb_assert (TYPE_CODE (type) == TYPE_CODE_PTR ||
|
TYPE_CODE (type) == TYPE_CODE_REF);
|
TYPE_CODE (type) == TYPE_CODE_REF);
|
|
|
ptr = extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
|
ptr = extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
|
|
|
target_code = TYPE_CODE (TYPE_TARGET_TYPE (type));
|
target_code = TYPE_CODE (TYPE_TARGET_TYPE (type));
|
|
|
if (target_code == TYPE_CODE_FUNC || target_code == TYPE_CODE_METHOD)
|
if (target_code == TYPE_CODE_FUNC || target_code == TYPE_CODE_METHOD)
|
{
|
{
|
/* See if there is a minimal symbol at that address whose name is
|
/* See if there is a minimal symbol at that address whose name is
|
"NAME.plt". */
|
"NAME.plt". */
|
struct minimal_symbol *ptr_msym = lookup_minimal_symbol_by_pc (ptr);
|
struct minimal_symbol *ptr_msym = lookup_minimal_symbol_by_pc (ptr);
|
|
|
if (ptr_msym)
|
if (ptr_msym)
|
{
|
{
|
char *ptr_msym_name = SYMBOL_LINKAGE_NAME (ptr_msym);
|
char *ptr_msym_name = SYMBOL_LINKAGE_NAME (ptr_msym);
|
int len = strlen (ptr_msym_name);
|
int len = strlen (ptr_msym_name);
|
|
|
if (len > 4
|
if (len > 4
|
&& strcmp (ptr_msym_name + len - 4, ".plt") == 0)
|
&& strcmp (ptr_msym_name + len - 4, ".plt") == 0)
|
{
|
{
|
struct minimal_symbol *func_msym;
|
struct minimal_symbol *func_msym;
|
/* We have a .plt symbol; try to find the symbol for the
|
/* We have a .plt symbol; try to find the symbol for the
|
corresponding function.
|
corresponding function.
|
|
|
Since the trampoline contains a jump instruction, we
|
Since the trampoline contains a jump instruction, we
|
could also just extract the jump's target address. I
|
could also just extract the jump's target address. I
|
don't see much advantage one way or the other. */
|
don't see much advantage one way or the other. */
|
char *func_name = xmalloc (len - 4 + 1);
|
char *func_name = xmalloc (len - 4 + 1);
|
memcpy (func_name, ptr_msym_name, len - 4);
|
memcpy (func_name, ptr_msym_name, len - 4);
|
func_name[len - 4] = '\0';
|
func_name[len - 4] = '\0';
|
func_msym
|
func_msym
|
= lookup_minimal_symbol (func_name, NULL, NULL);
|
= lookup_minimal_symbol (func_name, NULL, NULL);
|
|
|
/* If we do have such a symbol, return its value as the
|
/* If we do have such a symbol, return its value as the
|
function's true address. */
|
function's true address. */
|
if (func_msym)
|
if (func_msym)
|
ptr = SYMBOL_VALUE_ADDRESS (func_msym);
|
ptr = SYMBOL_VALUE_ADDRESS (func_msym);
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
int aspace;
|
int aspace;
|
|
|
for (aspace = 1; aspace <= 15; aspace++)
|
for (aspace = 1; aspace <= 15; aspace++)
|
{
|
{
|
ptr_msym = lookup_minimal_symbol_by_pc ((aspace << 16) | ptr);
|
ptr_msym = lookup_minimal_symbol_by_pc ((aspace << 16) | ptr);
|
|
|
if (ptr_msym)
|
if (ptr_msym)
|
ptr |= aspace << 16;
|
ptr |= aspace << 16;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
return ptr;
|
return ptr;
|
}
|
}
|
|
|
static void
|
static void
|
m32c_virtual_frame_pointer (struct gdbarch *gdbarch, CORE_ADDR pc,
|
m32c_virtual_frame_pointer (struct gdbarch *gdbarch, CORE_ADDR pc,
|
int *frame_regnum,
|
int *frame_regnum,
|
LONGEST *frame_offset)
|
LONGEST *frame_offset)
|
{
|
{
|
char *name;
|
char *name;
|
CORE_ADDR func_addr, func_end, sal_end;
|
CORE_ADDR func_addr, func_end, sal_end;
|
struct m32c_prologue p;
|
struct m32c_prologue p;
|
|
|
struct regcache *regcache = get_current_regcache ();
|
struct regcache *regcache = get_current_regcache ();
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
if (!find_pc_partial_function (pc, &name, &func_addr, &func_end))
|
if (!find_pc_partial_function (pc, &name, &func_addr, &func_end))
|
internal_error (__FILE__, __LINE__, _("No virtual frame pointer available"));
|
internal_error (__FILE__, __LINE__, _("No virtual frame pointer available"));
|
|
|
m32c_analyze_prologue (gdbarch, func_addr, pc, &p);
|
m32c_analyze_prologue (gdbarch, func_addr, pc, &p);
|
switch (p.kind)
|
switch (p.kind)
|
{
|
{
|
case prologue_with_frame_ptr:
|
case prologue_with_frame_ptr:
|
*frame_regnum = m32c_banked_register (tdep->fb, regcache)->num;
|
*frame_regnum = m32c_banked_register (tdep->fb, regcache)->num;
|
*frame_offset = p.frame_ptr_offset;
|
*frame_offset = p.frame_ptr_offset;
|
break;
|
break;
|
case prologue_sans_frame_ptr:
|
case prologue_sans_frame_ptr:
|
*frame_regnum = m32c_banked_register (tdep->sp, regcache)->num;
|
*frame_regnum = m32c_banked_register (tdep->sp, regcache)->num;
|
*frame_offset = p.frame_size;
|
*frame_offset = p.frame_size;
|
break;
|
break;
|
default:
|
default:
|
*frame_regnum = m32c_banked_register (tdep->sp, regcache)->num;
|
*frame_regnum = m32c_banked_register (tdep->sp, regcache)->num;
|
*frame_offset = 0;
|
*frame_offset = 0;
|
break;
|
break;
|
}
|
}
|
/* Sanity check */
|
/* Sanity check */
|
if (*frame_regnum > gdbarch_num_regs (gdbarch))
|
if (*frame_regnum > gdbarch_num_regs (gdbarch))
|
internal_error (__FILE__, __LINE__, _("No virtual frame pointer available"));
|
internal_error (__FILE__, __LINE__, _("No virtual frame pointer available"));
|
}
|
}
|
|
|
|
|
/* Initialization. */
|
/* Initialization. */
|
|
|
static struct gdbarch *
|
static struct gdbarch *
|
m32c_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
m32c_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
{
|
{
|
struct gdbarch *arch;
|
struct gdbarch *arch;
|
struct gdbarch_tdep *tdep;
|
struct gdbarch_tdep *tdep;
|
unsigned long mach = info.bfd_arch_info->mach;
|
unsigned long mach = info.bfd_arch_info->mach;
|
|
|
/* Find a candidate among the list of architectures we've created
|
/* Find a candidate among the list of architectures we've created
|
already. */
|
already. */
|
for (arches = gdbarch_list_lookup_by_info (arches, &info);
|
for (arches = gdbarch_list_lookup_by_info (arches, &info);
|
arches != NULL;
|
arches != NULL;
|
arches = gdbarch_list_lookup_by_info (arches->next, &info))
|
arches = gdbarch_list_lookup_by_info (arches->next, &info))
|
return arches->gdbarch;
|
return arches->gdbarch;
|
|
|
tdep = xcalloc (1, sizeof (*tdep));
|
tdep = xcalloc (1, sizeof (*tdep));
|
arch = gdbarch_alloc (&info, tdep);
|
arch = gdbarch_alloc (&info, tdep);
|
|
|
/* Essential types. */
|
/* Essential types. */
|
make_types (arch);
|
make_types (arch);
|
|
|
/* Address/pointer conversions. */
|
/* Address/pointer conversions. */
|
if (mach == bfd_mach_m16c)
|
if (mach == bfd_mach_m16c)
|
{
|
{
|
set_gdbarch_address_to_pointer (arch, m32c_m16c_address_to_pointer);
|
set_gdbarch_address_to_pointer (arch, m32c_m16c_address_to_pointer);
|
set_gdbarch_pointer_to_address (arch, m32c_m16c_pointer_to_address);
|
set_gdbarch_pointer_to_address (arch, m32c_m16c_pointer_to_address);
|
}
|
}
|
|
|
/* Register set. */
|
/* Register set. */
|
make_regs (arch);
|
make_regs (arch);
|
|
|
/* Disassembly. */
|
/* Disassembly. */
|
set_gdbarch_print_insn (arch, print_insn_m32c);
|
set_gdbarch_print_insn (arch, print_insn_m32c);
|
|
|
/* Breakpoints. */
|
/* Breakpoints. */
|
set_gdbarch_breakpoint_from_pc (arch, m32c_breakpoint_from_pc);
|
set_gdbarch_breakpoint_from_pc (arch, m32c_breakpoint_from_pc);
|
|
|
/* Prologue analysis and unwinding. */
|
/* Prologue analysis and unwinding. */
|
set_gdbarch_inner_than (arch, core_addr_lessthan);
|
set_gdbarch_inner_than (arch, core_addr_lessthan);
|
set_gdbarch_skip_prologue (arch, m32c_skip_prologue);
|
set_gdbarch_skip_prologue (arch, m32c_skip_prologue);
|
set_gdbarch_unwind_pc (arch, m32c_unwind_pc);
|
set_gdbarch_unwind_pc (arch, m32c_unwind_pc);
|
set_gdbarch_unwind_sp (arch, m32c_unwind_sp);
|
set_gdbarch_unwind_sp (arch, m32c_unwind_sp);
|
#if 0
|
#if 0
|
/* I'm dropping the dwarf2 sniffer because it has a few problems.
|
/* I'm dropping the dwarf2 sniffer because it has a few problems.
|
They may be in the dwarf2 cfi code in GDB, or they may be in
|
They may be in the dwarf2 cfi code in GDB, or they may be in
|
the debug info emitted by the upstream toolchain. I don't
|
the debug info emitted by the upstream toolchain. I don't
|
know which, but I do know that the prologue analyzer works better.
|
know which, but I do know that the prologue analyzer works better.
|
MVS 04/13/06
|
MVS 04/13/06
|
*/
|
*/
|
dwarf2_append_sniffers (arch);
|
dwarf2_append_sniffers (arch);
|
#endif
|
#endif
|
frame_unwind_append_unwinder (arch, &m32c_unwind);
|
frame_unwind_append_unwinder (arch, &m32c_unwind);
|
|
|
/* Inferior calls. */
|
/* Inferior calls. */
|
set_gdbarch_push_dummy_call (arch, m32c_push_dummy_call);
|
set_gdbarch_push_dummy_call (arch, m32c_push_dummy_call);
|
set_gdbarch_return_value (arch, m32c_return_value);
|
set_gdbarch_return_value (arch, m32c_return_value);
|
set_gdbarch_dummy_id (arch, m32c_dummy_id);
|
set_gdbarch_dummy_id (arch, m32c_dummy_id);
|
|
|
/* Trampolines. */
|
/* Trampolines. */
|
set_gdbarch_skip_trampoline_code (arch, m32c_skip_trampoline_code);
|
set_gdbarch_skip_trampoline_code (arch, m32c_skip_trampoline_code);
|
|
|
set_gdbarch_virtual_frame_pointer (arch, m32c_virtual_frame_pointer);
|
set_gdbarch_virtual_frame_pointer (arch, m32c_virtual_frame_pointer);
|
|
|
/* m32c function boundary addresses are not necessarily even.
|
/* m32c function boundary addresses are not necessarily even.
|
Therefore, the `vbit', which indicates a pointer to a virtual
|
Therefore, the `vbit', which indicates a pointer to a virtual
|
member function, is stored in the delta field, rather than as
|
member function, is stored in the delta field, rather than as
|
the low bit of a function pointer address.
|
the low bit of a function pointer address.
|
|
|
In order to verify this, see the definition of
|
In order to verify this, see the definition of
|
TARGET_PTRMEMFUNC_VBIT_LOCATION in gcc/defaults.h along with the
|
TARGET_PTRMEMFUNC_VBIT_LOCATION in gcc/defaults.h along with the
|
definition of FUNCTION_BOUNDARY in gcc/config/m32c/m32c.h. */
|
definition of FUNCTION_BOUNDARY in gcc/config/m32c/m32c.h. */
|
set_gdbarch_vbit_in_delta (arch, 1);
|
set_gdbarch_vbit_in_delta (arch, 1);
|
|
|
return arch;
|
return arch;
|
}
|
}
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
extern initialize_file_ftype _initialize_m32c_tdep;
|
extern initialize_file_ftype _initialize_m32c_tdep;
|
|
|
void
|
void
|
_initialize_m32c_tdep (void)
|
_initialize_m32c_tdep (void)
|
{
|
{
|
register_gdbarch_init (bfd_arch_m32c, m32c_gdbarch_init);
|
register_gdbarch_init (bfd_arch_m32c, m32c_gdbarch_init);
|
|
|
m32c_dma_reggroup = reggroup_new ("dma", USER_REGGROUP);
|
m32c_dma_reggroup = reggroup_new ("dma", USER_REGGROUP);
|
}
|
}
|
|
|
