/* Target-dependent code for the Sanyo Xstormy16a (LC590000) processor.
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/* Target-dependent code for the Sanyo Xstormy16a (LC590000) processor.
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Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
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Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
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Free Software Foundation, Inc.
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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 "frame.h"
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#include "frame.h"
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#include "frame-base.h"
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#include "frame-base.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 "symtab.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "gdbtypes.h"
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#include "gdbcmd.h"
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#include "gdbcmd.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 "dis-asm.h"
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#include "dis-asm.h"
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#include "inferior.h"
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#include "inferior.h"
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#include "gdb_string.h"
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#include "gdb_string.h"
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#include "gdb_assert.h"
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#include "gdb_assert.h"
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#include "arch-utils.h"
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#include "arch-utils.h"
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#include "floatformat.h"
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#include "floatformat.h"
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#include "regcache.h"
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#include "regcache.h"
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#include "doublest.h"
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#include "doublest.h"
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#include "osabi.h"
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#include "osabi.h"
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#include "objfiles.h"
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#include "objfiles.h"
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enum gdb_regnum
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enum gdb_regnum
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{
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{
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/* Xstormy16 has 16 general purpose registers (R0-R15) plus PC.
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/* Xstormy16 has 16 general purpose registers (R0-R15) plus PC.
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Functions will return their values in register R2-R7 as they fit.
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Functions will return their values in register R2-R7 as they fit.
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Otherwise a hidden pointer to an big enough area is given as argument
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Otherwise a hidden pointer to an big enough area is given as argument
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to the function in r2. Further arguments are beginning in r3 then.
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to the function in r2. Further arguments are beginning in r3 then.
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R13 is used as frame pointer when GCC compiles w/o optimization
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R13 is used as frame pointer when GCC compiles w/o optimization
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R14 is used as "PSW", displaying the CPU status.
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R14 is used as "PSW", displaying the CPU status.
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R15 is used implicitely as stack pointer. */
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R15 is used implicitely as stack pointer. */
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E_R0_REGNUM,
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E_R0_REGNUM,
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E_R1_REGNUM,
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E_R1_REGNUM,
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E_R2_REGNUM, E_1ST_ARG_REGNUM = E_R2_REGNUM, E_PTR_RET_REGNUM = E_R2_REGNUM,
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E_R2_REGNUM, E_1ST_ARG_REGNUM = E_R2_REGNUM, E_PTR_RET_REGNUM = E_R2_REGNUM,
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E_R3_REGNUM,
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E_R3_REGNUM,
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E_R4_REGNUM,
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E_R4_REGNUM,
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E_R5_REGNUM,
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E_R5_REGNUM,
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E_R6_REGNUM,
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E_R6_REGNUM,
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E_R7_REGNUM, E_LST_ARG_REGNUM = E_R7_REGNUM,
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E_R7_REGNUM, E_LST_ARG_REGNUM = E_R7_REGNUM,
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E_R8_REGNUM,
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E_R8_REGNUM,
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E_R9_REGNUM,
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E_R9_REGNUM,
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E_R10_REGNUM,
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E_R10_REGNUM,
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E_R11_REGNUM,
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E_R11_REGNUM,
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E_R12_REGNUM,
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E_R12_REGNUM,
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E_R13_REGNUM, E_FP_REGNUM = E_R13_REGNUM,
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E_R13_REGNUM, E_FP_REGNUM = E_R13_REGNUM,
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E_R14_REGNUM, E_PSW_REGNUM = E_R14_REGNUM,
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E_R14_REGNUM, E_PSW_REGNUM = E_R14_REGNUM,
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E_R15_REGNUM, E_SP_REGNUM = E_R15_REGNUM,
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E_R15_REGNUM, E_SP_REGNUM = E_R15_REGNUM,
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E_PC_REGNUM,
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E_PC_REGNUM,
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E_NUM_REGS
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E_NUM_REGS
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};
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};
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/* Use an invalid address value as 'not available' marker. */
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/* Use an invalid address value as 'not available' marker. */
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enum { REG_UNAVAIL = (CORE_ADDR) -1 };
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enum { REG_UNAVAIL = (CORE_ADDR) -1 };
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struct xstormy16_frame_cache
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struct xstormy16_frame_cache
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{
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{
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/* Base address. */
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/* Base address. */
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CORE_ADDR base;
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CORE_ADDR base;
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CORE_ADDR pc;
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CORE_ADDR pc;
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LONGEST framesize;
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LONGEST framesize;
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int uses_fp;
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int uses_fp;
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CORE_ADDR saved_regs[E_NUM_REGS];
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CORE_ADDR saved_regs[E_NUM_REGS];
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CORE_ADDR saved_sp;
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CORE_ADDR saved_sp;
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};
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};
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/* Size of instructions, registers, etc. */
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/* Size of instructions, registers, etc. */
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enum
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enum
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{
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{
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xstormy16_inst_size = 2,
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xstormy16_inst_size = 2,
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xstormy16_reg_size = 2,
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xstormy16_reg_size = 2,
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xstormy16_pc_size = 4
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xstormy16_pc_size = 4
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};
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};
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/* Size of return datatype which fits into the remaining return registers. */
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/* Size of return datatype which fits into the remaining return registers. */
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#define E_MAX_RETTYPE_SIZE(regnum) ((E_LST_ARG_REGNUM - (regnum) + 1) \
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#define E_MAX_RETTYPE_SIZE(regnum) ((E_LST_ARG_REGNUM - (regnum) + 1) \
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* xstormy16_reg_size)
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* xstormy16_reg_size)
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/* Size of return datatype which fits into all return registers. */
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/* Size of return datatype which fits into all return registers. */
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enum
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enum
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{
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{
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E_MAX_RETTYPE_SIZE_IN_REGS = E_MAX_RETTYPE_SIZE (E_R2_REGNUM)
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E_MAX_RETTYPE_SIZE_IN_REGS = E_MAX_RETTYPE_SIZE (E_R2_REGNUM)
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};
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};
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/* Function: xstormy16_register_name
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/* Function: xstormy16_register_name
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Returns the name of the standard Xstormy16 register N. */
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Returns the name of the standard Xstormy16 register N. */
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static const char *
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static const char *
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xstormy16_register_name (struct gdbarch *gdbarch, int regnum)
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xstormy16_register_name (struct gdbarch *gdbarch, int regnum)
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{
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{
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static char *register_names[] = {
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static char *register_names[] = {
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13",
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"r8", "r9", "r10", "r11", "r12", "r13",
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"psw", "sp", "pc"
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"psw", "sp", "pc"
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};
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};
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if (regnum < 0 || regnum >= E_NUM_REGS)
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if (regnum < 0 || regnum >= E_NUM_REGS)
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internal_error (__FILE__, __LINE__,
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internal_error (__FILE__, __LINE__,
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_("xstormy16_register_name: illegal register number %d"),
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_("xstormy16_register_name: illegal register number %d"),
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regnum);
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regnum);
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else
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else
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return register_names[regnum];
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return register_names[regnum];
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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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xstormy16_register_type (struct gdbarch *gdbarch, int regnum)
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xstormy16_register_type (struct gdbarch *gdbarch, int regnum)
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{
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{
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if (regnum == E_PC_REGNUM)
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if (regnum == E_PC_REGNUM)
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return builtin_type (gdbarch)->builtin_uint32;
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return builtin_type (gdbarch)->builtin_uint32;
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else
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else
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return builtin_type (gdbarch)->builtin_uint16;
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return builtin_type (gdbarch)->builtin_uint16;
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}
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}
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/* Function: xstormy16_type_is_scalar
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/* Function: xstormy16_type_is_scalar
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Makes the decision if a given type is a scalar types. Scalar
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Makes the decision if a given type is a scalar types. Scalar
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types are returned in the registers r2-r7 as they fit. */
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types are returned in the registers r2-r7 as they fit. */
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static int
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static int
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xstormy16_type_is_scalar (struct type *t)
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xstormy16_type_is_scalar (struct type *t)
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{
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{
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return (TYPE_CODE(t) != TYPE_CODE_STRUCT
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return (TYPE_CODE(t) != TYPE_CODE_STRUCT
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&& TYPE_CODE(t) != TYPE_CODE_UNION
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&& TYPE_CODE(t) != TYPE_CODE_UNION
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&& TYPE_CODE(t) != TYPE_CODE_ARRAY);
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&& TYPE_CODE(t) != TYPE_CODE_ARRAY);
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}
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}
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/* Function: xstormy16_use_struct_convention
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/* Function: xstormy16_use_struct_convention
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Returns non-zero if the given struct type will be returned using
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Returns non-zero if the given struct type will be returned using
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a special convention, rather than the normal function return method.
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a special convention, rather than the normal function return method.
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7sed in the contexts of the "return" command, and of
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7sed in the contexts of the "return" command, and of
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target function calls from the debugger. */
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target function calls from the debugger. */
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static int
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static int
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xstormy16_use_struct_convention (struct type *type)
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xstormy16_use_struct_convention (struct type *type)
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{
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{
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return !xstormy16_type_is_scalar (type)
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return !xstormy16_type_is_scalar (type)
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|| TYPE_LENGTH (type) > E_MAX_RETTYPE_SIZE_IN_REGS;
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|| TYPE_LENGTH (type) > E_MAX_RETTYPE_SIZE_IN_REGS;
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}
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}
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/* Function: xstormy16_extract_return_value
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/* Function: xstormy16_extract_return_value
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Find a function's return value in the appropriate registers (in
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Find a function's return value in the appropriate registers (in
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regbuf), and copy it into valbuf. */
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regbuf), and copy it into valbuf. */
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static void
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static void
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xstormy16_extract_return_value (struct type *type, struct regcache *regcache,
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xstormy16_extract_return_value (struct type *type, struct regcache *regcache,
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void *valbuf)
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void *valbuf)
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{
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{
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int len = TYPE_LENGTH (type);
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int len = TYPE_LENGTH (type);
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int i, regnum = E_1ST_ARG_REGNUM;
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int i, regnum = E_1ST_ARG_REGNUM;
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for (i = 0; i < len; i += xstormy16_reg_size)
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for (i = 0; i < len; i += xstormy16_reg_size)
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regcache_raw_read (regcache, regnum++, (char *) valbuf + i);
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regcache_raw_read (regcache, regnum++, (char *) valbuf + i);
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}
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}
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/* Function: xstormy16_store_return_value
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/* Function: xstormy16_store_return_value
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Copy the function return value from VALBUF into the
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Copy the function return value from VALBUF into the
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proper location for a function return.
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proper location for a function return.
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Called only in the context of the "return" command. */
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Called only in the context of the "return" command. */
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static void
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static void
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xstormy16_store_return_value (struct type *type, struct regcache *regcache,
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xstormy16_store_return_value (struct type *type, struct regcache *regcache,
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const void *valbuf)
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const void *valbuf)
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{
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{
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if (TYPE_LENGTH (type) == 1)
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if (TYPE_LENGTH (type) == 1)
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{
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{
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/* Add leading zeros to the value. */
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/* Add leading zeros to the value. */
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char buf[xstormy16_reg_size];
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char buf[xstormy16_reg_size];
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memset (buf, 0, xstormy16_reg_size);
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memset (buf, 0, xstormy16_reg_size);
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memcpy (buf, valbuf, 1);
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memcpy (buf, valbuf, 1);
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regcache_raw_write (regcache, E_1ST_ARG_REGNUM, buf);
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regcache_raw_write (regcache, E_1ST_ARG_REGNUM, buf);
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}
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}
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else
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else
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{
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{
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int len = TYPE_LENGTH (type);
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int len = TYPE_LENGTH (type);
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int i, regnum = E_1ST_ARG_REGNUM;
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int i, regnum = E_1ST_ARG_REGNUM;
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for (i = 0; i < len; i += xstormy16_reg_size)
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for (i = 0; i < len; i += xstormy16_reg_size)
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regcache_raw_write (regcache, regnum++, (char *) valbuf + i);
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regcache_raw_write (regcache, regnum++, (char *) valbuf + i);
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}
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}
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}
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}
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static enum return_value_convention
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static enum return_value_convention
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xstormy16_return_value (struct gdbarch *gdbarch, struct type *func_type,
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xstormy16_return_value (struct gdbarch *gdbarch, struct type *func_type,
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struct type *type, struct regcache *regcache,
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struct type *type, struct regcache *regcache,
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gdb_byte *readbuf, const gdb_byte *writebuf)
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gdb_byte *readbuf, const gdb_byte *writebuf)
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{
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{
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if (xstormy16_use_struct_convention (type))
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if (xstormy16_use_struct_convention (type))
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return RETURN_VALUE_STRUCT_CONVENTION;
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return RETURN_VALUE_STRUCT_CONVENTION;
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if (writebuf)
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if (writebuf)
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xstormy16_store_return_value (type, regcache, writebuf);
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xstormy16_store_return_value (type, regcache, writebuf);
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else if (readbuf)
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else if (readbuf)
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xstormy16_extract_return_value (type, regcache, readbuf);
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xstormy16_extract_return_value (type, regcache, readbuf);
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return RETURN_VALUE_REGISTER_CONVENTION;
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return RETURN_VALUE_REGISTER_CONVENTION;
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}
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}
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static CORE_ADDR
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static CORE_ADDR
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xstormy16_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
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xstormy16_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
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{
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{
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if (addr & 1)
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if (addr & 1)
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++addr;
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++addr;
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return addr;
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return addr;
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}
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}
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/* Function: xstormy16_push_dummy_call
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/* Function: xstormy16_push_dummy_call
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Setup the function arguments for GDB to call a function in the inferior.
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Setup the function arguments for GDB to call a function in the inferior.
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Called only in the context of a target function call from the debugger.
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Called only in the context of a target function call from the debugger.
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Returns the value of the SP register after the args are pushed. */
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Returns the value of the SP register after the args are pushed. */
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static CORE_ADDR
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static CORE_ADDR
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xstormy16_push_dummy_call (struct gdbarch *gdbarch,
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xstormy16_push_dummy_call (struct gdbarch *gdbarch,
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struct value *function,
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struct value *function,
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struct regcache *regcache,
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struct regcache *regcache,
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CORE_ADDR bp_addr, int nargs,
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CORE_ADDR bp_addr, int nargs,
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struct value **args,
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struct value **args,
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CORE_ADDR sp, int struct_return,
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CORE_ADDR sp, int struct_return,
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CORE_ADDR struct_addr)
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CORE_ADDR struct_addr)
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{
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{
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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CORE_ADDR stack_dest = sp;
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CORE_ADDR stack_dest = sp;
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int argreg = E_1ST_ARG_REGNUM;
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int argreg = E_1ST_ARG_REGNUM;
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int i, j;
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int i, j;
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int typelen, slacklen;
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int typelen, slacklen;
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const gdb_byte *val;
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const gdb_byte *val;
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char buf[xstormy16_pc_size];
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char buf[xstormy16_pc_size];
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/* If struct_return is true, then the struct return address will
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/* If struct_return is true, then the struct return address will
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consume one argument-passing register. */
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consume one argument-passing register. */
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if (struct_return)
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if (struct_return)
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{
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{
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regcache_cooked_write_unsigned (regcache, E_PTR_RET_REGNUM, struct_addr);
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regcache_cooked_write_unsigned (regcache, E_PTR_RET_REGNUM, struct_addr);
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argreg++;
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argreg++;
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}
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}
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/* Arguments are passed in R2-R7 as they fit. If an argument doesn't
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/* Arguments are passed in R2-R7 as they fit. If an argument doesn't
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fit in the remaining registers we're switching over to the stack.
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fit in the remaining registers we're switching over to the stack.
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No argument is put on stack partially and as soon as we switched
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No argument is put on stack partially and as soon as we switched
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over to stack no further argument is put in a register even if it
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over to stack no further argument is put in a register even if it
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would fit in the remaining unused registers. */
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would fit in the remaining unused registers. */
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for (i = 0; i < nargs && argreg <= E_LST_ARG_REGNUM; i++)
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for (i = 0; i < nargs && argreg <= E_LST_ARG_REGNUM; i++)
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{
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{
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typelen = TYPE_LENGTH (value_enclosing_type (args[i]));
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typelen = TYPE_LENGTH (value_enclosing_type (args[i]));
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if (typelen > E_MAX_RETTYPE_SIZE (argreg))
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if (typelen > E_MAX_RETTYPE_SIZE (argreg))
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break;
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break;
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/* Put argument into registers wordwise. */
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/* Put argument into registers wordwise. */
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val = value_contents (args[i]);
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val = value_contents (args[i]);
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for (j = 0; j < typelen; j += xstormy16_reg_size)
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for (j = 0; j < typelen; j += xstormy16_reg_size)
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regcache_cooked_write_unsigned (regcache, argreg++,
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regcache_cooked_write_unsigned (regcache, argreg++,
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extract_unsigned_integer (val + j,
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extract_unsigned_integer (val + j,
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typelen - j ==
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typelen - j ==
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1 ? 1 :
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1 ? 1 :
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xstormy16_reg_size,
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xstormy16_reg_size,
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byte_order));
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byte_order));
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}
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}
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/* Align SP */
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/* Align SP */
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stack_dest = xstormy16_frame_align (gdbarch, stack_dest);
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stack_dest = xstormy16_frame_align (gdbarch, stack_dest);
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|
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/* Loop backwards through remaining arguments and push them on the stack,
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/* Loop backwards through remaining arguments and push them on the stack,
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wordaligned. */
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wordaligned. */
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for (j = nargs - 1; j >= i; j--)
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for (j = nargs - 1; j >= i; j--)
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{
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{
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char *val;
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char *val;
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typelen = TYPE_LENGTH (value_enclosing_type (args[j]));
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typelen = TYPE_LENGTH (value_enclosing_type (args[j]));
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slacklen = typelen & 1;
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slacklen = typelen & 1;
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val = alloca (typelen + slacklen);
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val = alloca (typelen + slacklen);
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memcpy (val, value_contents (args[j]), typelen);
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memcpy (val, value_contents (args[j]), typelen);
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memset (val + typelen, 0, slacklen);
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memset (val + typelen, 0, slacklen);
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|
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/* Now write this data to the stack. The stack grows upwards. */
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/* Now write this data to the stack. The stack grows upwards. */
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write_memory (stack_dest, val, typelen + slacklen);
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write_memory (stack_dest, val, typelen + slacklen);
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stack_dest += typelen + slacklen;
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stack_dest += typelen + slacklen;
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}
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}
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store_unsigned_integer (buf, xstormy16_pc_size, byte_order, bp_addr);
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store_unsigned_integer (buf, xstormy16_pc_size, byte_order, bp_addr);
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write_memory (stack_dest, buf, xstormy16_pc_size);
|
write_memory (stack_dest, buf, xstormy16_pc_size);
|
stack_dest += xstormy16_pc_size;
|
stack_dest += xstormy16_pc_size;
|
|
|
/* Update stack pointer. */
|
/* Update stack pointer. */
|
regcache_cooked_write_unsigned (regcache, E_SP_REGNUM, stack_dest);
|
regcache_cooked_write_unsigned (regcache, E_SP_REGNUM, stack_dest);
|
|
|
/* Return the new stack pointer minus the return address slot since
|
/* Return the new stack pointer minus the return address slot since
|
that's what DWARF2/GCC uses as the frame's CFA. */
|
that's what DWARF2/GCC uses as the frame's CFA. */
|
return stack_dest - xstormy16_pc_size;
|
return stack_dest - xstormy16_pc_size;
|
}
|
}
|
|
|
/* Function: xstormy16_scan_prologue
|
/* Function: xstormy16_scan_prologue
|
Decode the instructions within the given address range.
|
Decode the instructions within the given address range.
|
Decide when we must have reached the end of the function prologue.
|
Decide when we must have reached the end of the function prologue.
|
If a frame_info pointer is provided, fill in its saved_regs etc.
|
If a frame_info pointer is provided, fill in its saved_regs etc.
|
|
|
Returns the address of the first instruction after the prologue. */
|
Returns the address of the first instruction after the prologue. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
xstormy16_analyze_prologue (struct gdbarch *gdbarch,
|
xstormy16_analyze_prologue (struct gdbarch *gdbarch,
|
CORE_ADDR start_addr, CORE_ADDR end_addr,
|
CORE_ADDR start_addr, CORE_ADDR end_addr,
|
struct xstormy16_frame_cache *cache,
|
struct xstormy16_frame_cache *cache,
|
struct frame_info *this_frame)
|
struct frame_info *this_frame)
|
{
|
{
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
CORE_ADDR next_addr;
|
CORE_ADDR next_addr;
|
ULONGEST inst, inst2;
|
ULONGEST inst, inst2;
|
LONGEST offset;
|
LONGEST offset;
|
int regnum;
|
int regnum;
|
|
|
/* Initialize framesize with size of PC put on stack by CALLF inst. */
|
/* Initialize framesize with size of PC put on stack by CALLF inst. */
|
cache->saved_regs[E_PC_REGNUM] = 0;
|
cache->saved_regs[E_PC_REGNUM] = 0;
|
cache->framesize = xstormy16_pc_size;
|
cache->framesize = xstormy16_pc_size;
|
|
|
if (start_addr >= end_addr)
|
if (start_addr >= end_addr)
|
return end_addr;
|
return end_addr;
|
|
|
for (next_addr = start_addr;
|
for (next_addr = start_addr;
|
next_addr < end_addr; next_addr += xstormy16_inst_size)
|
next_addr < end_addr; next_addr += xstormy16_inst_size)
|
{
|
{
|
inst = read_memory_unsigned_integer (next_addr,
|
inst = read_memory_unsigned_integer (next_addr,
|
xstormy16_inst_size, byte_order);
|
xstormy16_inst_size, byte_order);
|
inst2 = read_memory_unsigned_integer (next_addr + xstormy16_inst_size,
|
inst2 = read_memory_unsigned_integer (next_addr + xstormy16_inst_size,
|
xstormy16_inst_size, byte_order);
|
xstormy16_inst_size, byte_order);
|
|
|
if (inst >= 0x0082 && inst <= 0x008d) /* push r2 .. push r13 */
|
if (inst >= 0x0082 && inst <= 0x008d) /* push r2 .. push r13 */
|
{
|
{
|
regnum = inst & 0x000f;
|
regnum = inst & 0x000f;
|
cache->saved_regs[regnum] = cache->framesize;
|
cache->saved_regs[regnum] = cache->framesize;
|
cache->framesize += xstormy16_reg_size;
|
cache->framesize += xstormy16_reg_size;
|
}
|
}
|
|
|
/* optional stack allocation for args and local vars <= 4 byte */
|
/* optional stack allocation for args and local vars <= 4 byte */
|
else if (inst == 0x301f || inst == 0x303f) /* inc r15, #0x1/#0x3 */
|
else if (inst == 0x301f || inst == 0x303f) /* inc r15, #0x1/#0x3 */
|
{
|
{
|
cache->framesize += ((inst & 0x0030) >> 4) + 1;
|
cache->framesize += ((inst & 0x0030) >> 4) + 1;
|
}
|
}
|
|
|
/* optional stack allocation for args and local vars > 4 && < 16 byte */
|
/* optional stack allocation for args and local vars > 4 && < 16 byte */
|
else if ((inst & 0xff0f) == 0x510f) /* 51Hf add r15, #0xH */
|
else if ((inst & 0xff0f) == 0x510f) /* 51Hf add r15, #0xH */
|
{
|
{
|
cache->framesize += (inst & 0x00f0) >> 4;
|
cache->framesize += (inst & 0x00f0) >> 4;
|
}
|
}
|
|
|
/* optional stack allocation for args and local vars >= 16 byte */
|
/* optional stack allocation for args and local vars >= 16 byte */
|
else if (inst == 0x314f && inst2 >= 0x0010) /* 314f HHHH add r15, #0xH */
|
else if (inst == 0x314f && inst2 >= 0x0010) /* 314f HHHH add r15, #0xH */
|
{
|
{
|
cache->framesize += inst2;
|
cache->framesize += inst2;
|
next_addr += xstormy16_inst_size;
|
next_addr += xstormy16_inst_size;
|
}
|
}
|
|
|
else if (inst == 0x46fd) /* mov r13, r15 */
|
else if (inst == 0x46fd) /* mov r13, r15 */
|
{
|
{
|
cache->uses_fp = 1;
|
cache->uses_fp = 1;
|
}
|
}
|
|
|
/* optional copying of args in r2-r7 to r10-r13 */
|
/* optional copying of args in r2-r7 to r10-r13 */
|
/* Probably only in optimized case but legal action for prologue */
|
/* Probably only in optimized case but legal action for prologue */
|
else if ((inst & 0xff00) == 0x4600 /* 46SD mov rD, rS */
|
else if ((inst & 0xff00) == 0x4600 /* 46SD mov rD, rS */
|
&& (inst & 0x00f0) >= 0x0020 && (inst & 0x00f0) <= 0x0070
|
&& (inst & 0x00f0) >= 0x0020 && (inst & 0x00f0) <= 0x0070
|
&& (inst & 0x000f) >= 0x00a0 && (inst & 0x000f) <= 0x000d)
|
&& (inst & 0x000f) >= 0x00a0 && (inst & 0x000f) <= 0x000d)
|
;
|
;
|
|
|
/* optional copying of args in r2-r7 to stack */
|
/* optional copying of args in r2-r7 to stack */
|
/* 72DS HHHH mov.b (rD, 0xHHHH), r(S-8) (bit3 always 1, bit2-0 = reg) */
|
/* 72DS HHHH mov.b (rD, 0xHHHH), r(S-8) (bit3 always 1, bit2-0 = reg) */
|
/* 73DS HHHH mov.w (rD, 0xHHHH), r(S-8) */
|
/* 73DS HHHH mov.w (rD, 0xHHHH), r(S-8) */
|
else if ((inst & 0xfed8) == 0x72d8 && (inst & 0x0007) >= 2)
|
else if ((inst & 0xfed8) == 0x72d8 && (inst & 0x0007) >= 2)
|
{
|
{
|
regnum = inst & 0x0007;
|
regnum = inst & 0x0007;
|
/* Only 12 of 16 bits of the argument are used for the
|
/* Only 12 of 16 bits of the argument are used for the
|
signed offset. */
|
signed offset. */
|
offset = (LONGEST) (inst2 & 0x0fff);
|
offset = (LONGEST) (inst2 & 0x0fff);
|
if (offset & 0x0800)
|
if (offset & 0x0800)
|
offset -= 0x1000;
|
offset -= 0x1000;
|
|
|
cache->saved_regs[regnum] = cache->framesize + offset;
|
cache->saved_regs[regnum] = cache->framesize + offset;
|
next_addr += xstormy16_inst_size;
|
next_addr += xstormy16_inst_size;
|
}
|
}
|
|
|
else /* Not a prologue instruction. */
|
else /* Not a prologue instruction. */
|
break;
|
break;
|
}
|
}
|
|
|
return next_addr;
|
return next_addr;
|
}
|
}
|
|
|
/* Function: xstormy16_skip_prologue
|
/* Function: xstormy16_skip_prologue
|
If the input address is in a function prologue,
|
If the input address is in a function prologue,
|
returns the address of the end of the prologue;
|
returns the address of the end of the prologue;
|
else returns the input address.
|
else returns the input address.
|
|
|
Note: the input address is likely to be the function start,
|
Note: the input address is likely to be the function start,
|
since this function is mainly used for advancing a breakpoint
|
since this function is mainly used for advancing a breakpoint
|
to the first line, or stepping to the first line when we have
|
to the first line, or stepping to the first line when we have
|
stepped into a function call. */
|
stepped into a function call. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
xstormy16_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
|
xstormy16_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
|
{
|
{
|
CORE_ADDR func_addr = 0, func_end = 0;
|
CORE_ADDR func_addr = 0, func_end = 0;
|
char *func_name;
|
char *func_name;
|
|
|
if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end))
|
if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end))
|
{
|
{
|
struct symtab_and_line sal;
|
struct symtab_and_line sal;
|
struct symbol *sym;
|
struct symbol *sym;
|
struct xstormy16_frame_cache cache;
|
struct xstormy16_frame_cache cache;
|
CORE_ADDR plg_end;
|
CORE_ADDR plg_end;
|
|
|
memset (&cache, 0, sizeof cache);
|
memset (&cache, 0, sizeof cache);
|
|
|
/* Don't trust line number debug info in frameless functions. */
|
/* Don't trust line number debug info in frameless functions. */
|
plg_end = xstormy16_analyze_prologue (gdbarch, func_addr, func_end,
|
plg_end = xstormy16_analyze_prologue (gdbarch, func_addr, func_end,
|
&cache, NULL);
|
&cache, NULL);
|
if (!cache.uses_fp)
|
if (!cache.uses_fp)
|
return plg_end;
|
return plg_end;
|
|
|
/* Found a function. */
|
/* Found a function. */
|
sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL);
|
sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL);
|
/* Don't use line number debug info for assembly source files. */
|
/* Don't use line number debug info for assembly source files. */
|
if (sym && SYMBOL_LANGUAGE (sym) != language_asm)
|
if (sym && SYMBOL_LANGUAGE (sym) != language_asm)
|
{
|
{
|
sal = find_pc_line (func_addr, 0);
|
sal = find_pc_line (func_addr, 0);
|
if (sal.end && sal.end < func_end)
|
if (sal.end && sal.end < func_end)
|
{
|
{
|
/* Found a line number, use it as end of prologue. */
|
/* Found a line number, use it as end of prologue. */
|
return sal.end;
|
return sal.end;
|
}
|
}
|
}
|
}
|
/* No useable line symbol. Use result of prologue parsing method. */
|
/* No useable line symbol. Use result of prologue parsing method. */
|
return plg_end;
|
return plg_end;
|
}
|
}
|
|
|
/* No function symbol -- just return the PC. */
|
/* No function symbol -- just return the PC. */
|
|
|
return (CORE_ADDR) pc;
|
return (CORE_ADDR) pc;
|
}
|
}
|
|
|
/* The epilogue is defined here as the area at the end of a function,
|
/* The epilogue is defined here as the area at the end of a function,
|
either on the `ret' instruction itself or after an instruction which
|
either on the `ret' instruction itself or after an instruction which
|
destroys the function's stack frame. */
|
destroys the function's stack frame. */
|
static int
|
static int
|
xstormy16_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
|
xstormy16_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
|
{
|
{
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
CORE_ADDR func_addr = 0, func_end = 0;
|
CORE_ADDR func_addr = 0, func_end = 0;
|
|
|
if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
|
if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
|
{
|
{
|
ULONGEST inst, inst2;
|
ULONGEST inst, inst2;
|
CORE_ADDR addr = func_end - xstormy16_inst_size;
|
CORE_ADDR addr = func_end - xstormy16_inst_size;
|
|
|
/* The Xstormy16 epilogue is max. 14 bytes long. */
|
/* The Xstormy16 epilogue is max. 14 bytes long. */
|
if (pc < func_end - 7 * xstormy16_inst_size)
|
if (pc < func_end - 7 * xstormy16_inst_size)
|
return 0;
|
return 0;
|
|
|
/* Check if we're on a `ret' instruction. Otherwise it's
|
/* Check if we're on a `ret' instruction. Otherwise it's
|
too dangerous to proceed. */
|
too dangerous to proceed. */
|
inst = read_memory_unsigned_integer (addr,
|
inst = read_memory_unsigned_integer (addr,
|
xstormy16_inst_size, byte_order);
|
xstormy16_inst_size, byte_order);
|
if (inst != 0x0003)
|
if (inst != 0x0003)
|
return 0;
|
return 0;
|
|
|
while ((addr -= xstormy16_inst_size) >= func_addr)
|
while ((addr -= xstormy16_inst_size) >= func_addr)
|
{
|
{
|
inst = read_memory_unsigned_integer (addr,
|
inst = read_memory_unsigned_integer (addr,
|
xstormy16_inst_size, byte_order);
|
xstormy16_inst_size, byte_order);
|
if (inst >= 0x009a && inst <= 0x009d) /* pop r10...r13 */
|
if (inst >= 0x009a && inst <= 0x009d) /* pop r10...r13 */
|
continue;
|
continue;
|
if (inst == 0x305f || inst == 0x307f) /* dec r15, #0x1/#0x3 */
|
if (inst == 0x305f || inst == 0x307f) /* dec r15, #0x1/#0x3 */
|
break;
|
break;
|
inst2 = read_memory_unsigned_integer (addr - xstormy16_inst_size,
|
inst2 = read_memory_unsigned_integer (addr - xstormy16_inst_size,
|
xstormy16_inst_size, byte_order);
|
xstormy16_inst_size, byte_order);
|
if (inst2 == 0x314f && inst >= 0x8000) /* add r15, neg. value */
|
if (inst2 == 0x314f && inst >= 0x8000) /* add r15, neg. value */
|
{
|
{
|
addr -= xstormy16_inst_size;
|
addr -= xstormy16_inst_size;
|
break;
|
break;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
if (pc > addr)
|
if (pc > addr)
|
return 1;
|
return 1;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
const static unsigned char *
|
const static unsigned char *
|
xstormy16_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
|
xstormy16_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
|
int *lenptr)
|
int *lenptr)
|
{
|
{
|
static unsigned char breakpoint[] = { 0x06, 0x0 };
|
static unsigned char breakpoint[] = { 0x06, 0x0 };
|
*lenptr = sizeof (breakpoint);
|
*lenptr = sizeof (breakpoint);
|
return breakpoint;
|
return breakpoint;
|
}
|
}
|
|
|
/* Given a pointer to a jump table entry, return the address
|
/* Given a pointer to a jump table entry, return the address
|
of the function it jumps to. Return 0 if not found. */
|
of the function it jumps to. Return 0 if not found. */
|
static CORE_ADDR
|
static CORE_ADDR
|
xstormy16_resolve_jmp_table_entry (struct gdbarch *gdbarch, CORE_ADDR faddr)
|
xstormy16_resolve_jmp_table_entry (struct gdbarch *gdbarch, CORE_ADDR faddr)
|
{
|
{
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
struct obj_section *faddr_sect = find_pc_section (faddr);
|
struct obj_section *faddr_sect = find_pc_section (faddr);
|
|
|
if (faddr_sect)
|
if (faddr_sect)
|
{
|
{
|
LONGEST inst, inst2, addr;
|
LONGEST inst, inst2, addr;
|
char buf[2 * xstormy16_inst_size];
|
char buf[2 * xstormy16_inst_size];
|
|
|
/* Return faddr if it's not pointing into the jump table. */
|
/* Return faddr if it's not pointing into the jump table. */
|
if (strcmp (faddr_sect->the_bfd_section->name, ".plt"))
|
if (strcmp (faddr_sect->the_bfd_section->name, ".plt"))
|
return faddr;
|
return faddr;
|
|
|
if (!target_read_memory (faddr, buf, sizeof buf))
|
if (!target_read_memory (faddr, buf, sizeof buf))
|
{
|
{
|
inst = extract_unsigned_integer (buf,
|
inst = extract_unsigned_integer (buf,
|
xstormy16_inst_size, byte_order);
|
xstormy16_inst_size, byte_order);
|
inst2 = extract_unsigned_integer (buf + xstormy16_inst_size,
|
inst2 = extract_unsigned_integer (buf + xstormy16_inst_size,
|
xstormy16_inst_size, byte_order);
|
xstormy16_inst_size, byte_order);
|
addr = inst2 << 8 | (inst & 0xff);
|
addr = inst2 << 8 | (inst & 0xff);
|
return addr;
|
return addr;
|
}
|
}
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Given a function's address, attempt to find (and return) the
|
/* Given a function's address, attempt to find (and return) the
|
address of the corresponding jump table entry. Return 0 if
|
address of the corresponding jump table entry. Return 0 if
|
not found. */
|
not found. */
|
static CORE_ADDR
|
static CORE_ADDR
|
xstormy16_find_jmp_table_entry (struct gdbarch *gdbarch, CORE_ADDR faddr)
|
xstormy16_find_jmp_table_entry (struct gdbarch *gdbarch, CORE_ADDR faddr)
|
{
|
{
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
struct obj_section *faddr_sect = find_pc_section (faddr);
|
struct obj_section *faddr_sect = find_pc_section (faddr);
|
|
|
if (faddr_sect)
|
if (faddr_sect)
|
{
|
{
|
struct obj_section *osect;
|
struct obj_section *osect;
|
|
|
/* Return faddr if it's already a pointer to a jump table entry. */
|
/* Return faddr if it's already a pointer to a jump table entry. */
|
if (!strcmp (faddr_sect->the_bfd_section->name, ".plt"))
|
if (!strcmp (faddr_sect->the_bfd_section->name, ".plt"))
|
return faddr;
|
return faddr;
|
|
|
ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
|
ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
|
{
|
{
|
if (!strcmp (osect->the_bfd_section->name, ".plt"))
|
if (!strcmp (osect->the_bfd_section->name, ".plt"))
|
break;
|
break;
|
}
|
}
|
|
|
if (osect < faddr_sect->objfile->sections_end)
|
if (osect < faddr_sect->objfile->sections_end)
|
{
|
{
|
CORE_ADDR addr, endaddr;
|
CORE_ADDR addr, endaddr;
|
|
|
addr = obj_section_addr (osect);
|
addr = obj_section_addr (osect);
|
endaddr = obj_section_endaddr (osect);
|
endaddr = obj_section_endaddr (osect);
|
|
|
for (; addr < endaddr; addr += 2 * xstormy16_inst_size)
|
for (; addr < endaddr; addr += 2 * xstormy16_inst_size)
|
{
|
{
|
LONGEST inst, inst2, faddr2;
|
LONGEST inst, inst2, faddr2;
|
char buf[2 * xstormy16_inst_size];
|
char buf[2 * xstormy16_inst_size];
|
|
|
if (target_read_memory (addr, buf, sizeof buf))
|
if (target_read_memory (addr, buf, sizeof buf))
|
return 0;
|
return 0;
|
inst = extract_unsigned_integer (buf,
|
inst = extract_unsigned_integer (buf,
|
xstormy16_inst_size, byte_order);
|
xstormy16_inst_size, byte_order);
|
inst2 = extract_unsigned_integer (buf + xstormy16_inst_size,
|
inst2 = extract_unsigned_integer (buf + xstormy16_inst_size,
|
xstormy16_inst_size, byte_order);
|
xstormy16_inst_size, byte_order);
|
faddr2 = inst2 << 8 | (inst & 0xff);
|
faddr2 = inst2 << 8 | (inst & 0xff);
|
if (faddr == faddr2)
|
if (faddr == faddr2)
|
return addr;
|
return addr;
|
}
|
}
|
}
|
}
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
xstormy16_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
|
xstormy16_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
|
{
|
{
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
CORE_ADDR tmp = xstormy16_resolve_jmp_table_entry (gdbarch, pc);
|
CORE_ADDR tmp = xstormy16_resolve_jmp_table_entry (gdbarch, pc);
|
|
|
if (tmp && tmp != pc)
|
if (tmp && tmp != pc)
|
return tmp;
|
return tmp;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Function pointers are 16 bit. The address space is 24 bit, using
|
/* Function pointers are 16 bit. The address space is 24 bit, using
|
32 bit addresses. Pointers to functions on the XStormy16 are implemented
|
32 bit addresses. Pointers to functions on the XStormy16 are implemented
|
by using 16 bit pointers, which are either direct pointers in case the
|
by using 16 bit pointers, which are either direct pointers in case the
|
function begins below 0x10000, or indirect pointers into a jump table.
|
function begins below 0x10000, or indirect pointers into a jump table.
|
The next two functions convert 16 bit pointers into 24 (32) bit addresses
|
The next two functions convert 16 bit pointers into 24 (32) bit addresses
|
and vice versa. */
|
and vice versa. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
xstormy16_pointer_to_address (struct gdbarch *gdbarch,
|
xstormy16_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);
|
enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type));
|
enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type));
|
CORE_ADDR addr
|
CORE_ADDR addr
|
= extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
|
= extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
|
|
|
if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD)
|
if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD)
|
{
|
{
|
CORE_ADDR addr2 = xstormy16_resolve_jmp_table_entry (gdbarch, addr);
|
CORE_ADDR addr2 = xstormy16_resolve_jmp_table_entry (gdbarch, addr);
|
if (addr2)
|
if (addr2)
|
addr = addr2;
|
addr = addr2;
|
}
|
}
|
|
|
return addr;
|
return addr;
|
}
|
}
|
|
|
static void
|
static void
|
xstormy16_address_to_pointer (struct gdbarch *gdbarch,
|
xstormy16_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 = TYPE_CODE (TYPE_TARGET_TYPE (type));
|
enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type));
|
|
|
if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD)
|
if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD)
|
{
|
{
|
CORE_ADDR addr2 = xstormy16_find_jmp_table_entry (gdbarch, addr);
|
CORE_ADDR addr2 = xstormy16_find_jmp_table_entry (gdbarch, addr);
|
if (addr2)
|
if (addr2)
|
addr = addr2;
|
addr = addr2;
|
}
|
}
|
store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order, addr);
|
store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order, addr);
|
}
|
}
|
|
|
static struct xstormy16_frame_cache *
|
static struct xstormy16_frame_cache *
|
xstormy16_alloc_frame_cache (void)
|
xstormy16_alloc_frame_cache (void)
|
{
|
{
|
struct xstormy16_frame_cache *cache;
|
struct xstormy16_frame_cache *cache;
|
int i;
|
int i;
|
|
|
cache = FRAME_OBSTACK_ZALLOC (struct xstormy16_frame_cache);
|
cache = FRAME_OBSTACK_ZALLOC (struct xstormy16_frame_cache);
|
|
|
cache->base = 0;
|
cache->base = 0;
|
cache->saved_sp = 0;
|
cache->saved_sp = 0;
|
cache->pc = 0;
|
cache->pc = 0;
|
cache->uses_fp = 0;
|
cache->uses_fp = 0;
|
cache->framesize = 0;
|
cache->framesize = 0;
|
for (i = 0; i < E_NUM_REGS; ++i)
|
for (i = 0; i < E_NUM_REGS; ++i)
|
cache->saved_regs[i] = REG_UNAVAIL;
|
cache->saved_regs[i] = REG_UNAVAIL;
|
|
|
return cache;
|
return cache;
|
}
|
}
|
|
|
static struct xstormy16_frame_cache *
|
static struct xstormy16_frame_cache *
|
xstormy16_frame_cache (struct frame_info *this_frame, void **this_cache)
|
xstormy16_frame_cache (struct frame_info *this_frame, void **this_cache)
|
{
|
{
|
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
struct xstormy16_frame_cache *cache;
|
struct xstormy16_frame_cache *cache;
|
CORE_ADDR current_pc;
|
CORE_ADDR current_pc;
|
int i;
|
int i;
|
|
|
if (*this_cache)
|
if (*this_cache)
|
return *this_cache;
|
return *this_cache;
|
|
|
cache = xstormy16_alloc_frame_cache ();
|
cache = xstormy16_alloc_frame_cache ();
|
*this_cache = cache;
|
*this_cache = cache;
|
|
|
cache->base = get_frame_register_unsigned (this_frame, E_FP_REGNUM);
|
cache->base = get_frame_register_unsigned (this_frame, E_FP_REGNUM);
|
if (cache->base == 0)
|
if (cache->base == 0)
|
return cache;
|
return cache;
|
|
|
cache->pc = get_frame_func (this_frame);
|
cache->pc = get_frame_func (this_frame);
|
current_pc = get_frame_pc (this_frame);
|
current_pc = get_frame_pc (this_frame);
|
if (cache->pc)
|
if (cache->pc)
|
xstormy16_analyze_prologue (gdbarch, cache->pc, current_pc,
|
xstormy16_analyze_prologue (gdbarch, cache->pc, current_pc,
|
cache, this_frame);
|
cache, this_frame);
|
|
|
if (!cache->uses_fp)
|
if (!cache->uses_fp)
|
cache->base = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
|
cache->base = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
|
|
|
cache->saved_sp = cache->base - cache->framesize;
|
cache->saved_sp = cache->base - cache->framesize;
|
|
|
for (i = 0; i < E_NUM_REGS; ++i)
|
for (i = 0; i < E_NUM_REGS; ++i)
|
if (cache->saved_regs[i] != REG_UNAVAIL)
|
if (cache->saved_regs[i] != REG_UNAVAIL)
|
cache->saved_regs[i] += cache->saved_sp;
|
cache->saved_regs[i] += cache->saved_sp;
|
|
|
return cache;
|
return cache;
|
}
|
}
|
|
|
static struct value *
|
static struct value *
|
xstormy16_frame_prev_register (struct frame_info *this_frame,
|
xstormy16_frame_prev_register (struct frame_info *this_frame,
|
void **this_cache, int regnum)
|
void **this_cache, int regnum)
|
{
|
{
|
struct xstormy16_frame_cache *cache = xstormy16_frame_cache (this_frame,
|
struct xstormy16_frame_cache *cache = xstormy16_frame_cache (this_frame,
|
this_cache);
|
this_cache);
|
gdb_assert (regnum >= 0);
|
gdb_assert (regnum >= 0);
|
|
|
if (regnum == E_SP_REGNUM && cache->saved_sp)
|
if (regnum == E_SP_REGNUM && cache->saved_sp)
|
return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp);
|
return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp);
|
|
|
if (regnum < E_NUM_REGS && cache->saved_regs[regnum] != REG_UNAVAIL)
|
if (regnum < E_NUM_REGS && cache->saved_regs[regnum] != REG_UNAVAIL)
|
return frame_unwind_got_memory (this_frame, regnum,
|
return frame_unwind_got_memory (this_frame, regnum,
|
cache->saved_regs[regnum]);
|
cache->saved_regs[regnum]);
|
|
|
return frame_unwind_got_register (this_frame, regnum, regnum);
|
return frame_unwind_got_register (this_frame, regnum, regnum);
|
}
|
}
|
|
|
static void
|
static void
|
xstormy16_frame_this_id (struct frame_info *this_frame, void **this_cache,
|
xstormy16_frame_this_id (struct frame_info *this_frame, void **this_cache,
|
struct frame_id *this_id)
|
struct frame_id *this_id)
|
{
|
{
|
struct xstormy16_frame_cache *cache = xstormy16_frame_cache (this_frame,
|
struct xstormy16_frame_cache *cache = xstormy16_frame_cache (this_frame,
|
this_cache);
|
this_cache);
|
|
|
/* This marks the outermost frame. */
|
/* This marks the outermost frame. */
|
if (cache->base == 0)
|
if (cache->base == 0)
|
return;
|
return;
|
|
|
*this_id = frame_id_build (cache->saved_sp, cache->pc);
|
*this_id = frame_id_build (cache->saved_sp, cache->pc);
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
xstormy16_frame_base_address (struct frame_info *this_frame, void **this_cache)
|
xstormy16_frame_base_address (struct frame_info *this_frame, void **this_cache)
|
{
|
{
|
struct xstormy16_frame_cache *cache = xstormy16_frame_cache (this_frame,
|
struct xstormy16_frame_cache *cache = xstormy16_frame_cache (this_frame,
|
this_cache);
|
this_cache);
|
return cache->base;
|
return cache->base;
|
}
|
}
|
|
|
static const struct frame_unwind xstormy16_frame_unwind = {
|
static const struct frame_unwind xstormy16_frame_unwind = {
|
NORMAL_FRAME,
|
NORMAL_FRAME,
|
xstormy16_frame_this_id,
|
xstormy16_frame_this_id,
|
xstormy16_frame_prev_register,
|
xstormy16_frame_prev_register,
|
NULL,
|
NULL,
|
default_frame_sniffer
|
default_frame_sniffer
|
};
|
};
|
|
|
static const struct frame_base xstormy16_frame_base = {
|
static const struct frame_base xstormy16_frame_base = {
|
&xstormy16_frame_unwind,
|
&xstormy16_frame_unwind,
|
xstormy16_frame_base_address,
|
xstormy16_frame_base_address,
|
xstormy16_frame_base_address,
|
xstormy16_frame_base_address,
|
xstormy16_frame_base_address
|
xstormy16_frame_base_address
|
};
|
};
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
xstormy16_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
xstormy16_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
{
|
{
|
return frame_unwind_register_unsigned (next_frame, E_SP_REGNUM);
|
return frame_unwind_register_unsigned (next_frame, E_SP_REGNUM);
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
xstormy16_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
xstormy16_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
{
|
{
|
return frame_unwind_register_unsigned (next_frame, E_PC_REGNUM);
|
return frame_unwind_register_unsigned (next_frame, E_PC_REGNUM);
|
}
|
}
|
|
|
static struct frame_id
|
static struct frame_id
|
xstormy16_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
|
xstormy16_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
|
{
|
{
|
CORE_ADDR sp = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
|
CORE_ADDR sp = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
|
return frame_id_build (sp, get_frame_pc (this_frame));
|
return frame_id_build (sp, get_frame_pc (this_frame));
|
}
|
}
|
|
|
|
|
/* Function: xstormy16_gdbarch_init
|
/* Function: xstormy16_gdbarch_init
|
Initializer function for the xstormy16 gdbarch vector.
|
Initializer function for the xstormy16 gdbarch vector.
|
Called by gdbarch. Sets up the gdbarch vector(s) for this target. */
|
Called by gdbarch. Sets up the gdbarch vector(s) for this target. */
|
|
|
static struct gdbarch *
|
static struct gdbarch *
|
xstormy16_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
xstormy16_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
{
|
{
|
struct gdbarch *gdbarch;
|
struct gdbarch *gdbarch;
|
|
|
/* find a candidate among the list of pre-declared architectures. */
|
/* find a candidate among the list of pre-declared architectures. */
|
arches = gdbarch_list_lookup_by_info (arches, &info);
|
arches = gdbarch_list_lookup_by_info (arches, &info);
|
if (arches != NULL)
|
if (arches != NULL)
|
return (arches->gdbarch);
|
return (arches->gdbarch);
|
|
|
gdbarch = gdbarch_alloc (&info, NULL);
|
gdbarch = gdbarch_alloc (&info, NULL);
|
|
|
/*
|
/*
|
* Basic register fields and methods, datatype sizes and stuff.
|
* Basic register fields and methods, datatype sizes and stuff.
|
*/
|
*/
|
|
|
set_gdbarch_num_regs (gdbarch, E_NUM_REGS);
|
set_gdbarch_num_regs (gdbarch, E_NUM_REGS);
|
set_gdbarch_num_pseudo_regs (gdbarch, 0);
|
set_gdbarch_num_pseudo_regs (gdbarch, 0);
|
set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);
|
set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);
|
set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
|
set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
|
set_gdbarch_register_name (gdbarch, xstormy16_register_name);
|
set_gdbarch_register_name (gdbarch, xstormy16_register_name);
|
set_gdbarch_register_type (gdbarch, xstormy16_register_type);
|
set_gdbarch_register_type (gdbarch, xstormy16_register_type);
|
|
|
set_gdbarch_char_signed (gdbarch, 0);
|
set_gdbarch_char_signed (gdbarch, 0);
|
set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
|
|
set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
|
|
set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
|
|
set_gdbarch_address_to_pointer (gdbarch, xstormy16_address_to_pointer);
|
set_gdbarch_address_to_pointer (gdbarch, xstormy16_address_to_pointer);
|
set_gdbarch_pointer_to_address (gdbarch, xstormy16_pointer_to_address);
|
set_gdbarch_pointer_to_address (gdbarch, xstormy16_pointer_to_address);
|
|
|
/* Stack grows up. */
|
/* Stack grows up. */
|
set_gdbarch_inner_than (gdbarch, core_addr_greaterthan);
|
set_gdbarch_inner_than (gdbarch, core_addr_greaterthan);
|
|
|
/*
|
/*
|
* Frame Info
|
* Frame Info
|
*/
|
*/
|
set_gdbarch_unwind_sp (gdbarch, xstormy16_unwind_sp);
|
set_gdbarch_unwind_sp (gdbarch, xstormy16_unwind_sp);
|
set_gdbarch_unwind_pc (gdbarch, xstormy16_unwind_pc);
|
set_gdbarch_unwind_pc (gdbarch, xstormy16_unwind_pc);
|
set_gdbarch_dummy_id (gdbarch, xstormy16_dummy_id);
|
set_gdbarch_dummy_id (gdbarch, xstormy16_dummy_id);
|
set_gdbarch_frame_align (gdbarch, xstormy16_frame_align);
|
set_gdbarch_frame_align (gdbarch, xstormy16_frame_align);
|
frame_base_set_default (gdbarch, &xstormy16_frame_base);
|
frame_base_set_default (gdbarch, &xstormy16_frame_base);
|
|
|
set_gdbarch_skip_prologue (gdbarch, xstormy16_skip_prologue);
|
set_gdbarch_skip_prologue (gdbarch, xstormy16_skip_prologue);
|
set_gdbarch_in_function_epilogue_p (gdbarch,
|
set_gdbarch_in_function_epilogue_p (gdbarch,
|
xstormy16_in_function_epilogue_p);
|
xstormy16_in_function_epilogue_p);
|
|
|
/* These values and methods are used when gdb calls a target function. */
|
/* These values and methods are used when gdb calls a target function. */
|
set_gdbarch_push_dummy_call (gdbarch, xstormy16_push_dummy_call);
|
set_gdbarch_push_dummy_call (gdbarch, xstormy16_push_dummy_call);
|
set_gdbarch_breakpoint_from_pc (gdbarch, xstormy16_breakpoint_from_pc);
|
set_gdbarch_breakpoint_from_pc (gdbarch, xstormy16_breakpoint_from_pc);
|
set_gdbarch_return_value (gdbarch, xstormy16_return_value);
|
set_gdbarch_return_value (gdbarch, xstormy16_return_value);
|
|
|
set_gdbarch_skip_trampoline_code (gdbarch, xstormy16_skip_trampoline_code);
|
set_gdbarch_skip_trampoline_code (gdbarch, xstormy16_skip_trampoline_code);
|
|
|
set_gdbarch_print_insn (gdbarch, print_insn_xstormy16);
|
set_gdbarch_print_insn (gdbarch, print_insn_xstormy16);
|
|
|
gdbarch_init_osabi (info, gdbarch);
|
gdbarch_init_osabi (info, gdbarch);
|
|
|
dwarf2_append_unwinders (gdbarch);
|
dwarf2_append_unwinders (gdbarch);
|
frame_unwind_append_unwinder (gdbarch, &xstormy16_frame_unwind);
|
frame_unwind_append_unwinder (gdbarch, &xstormy16_frame_unwind);
|
|
|
return gdbarch;
|
return gdbarch;
|
}
|
}
|
|
|
/* Function: _initialize_xstormy16_tdep
|
/* Function: _initialize_xstormy16_tdep
|
Initializer function for the Sanyo Xstormy16a module.
|
Initializer function for the Sanyo Xstormy16a module.
|
Called by gdb at start-up. */
|
Called by gdb at start-up. */
|
|
|
extern initialize_file_ftype _initialize_xstormy16_tdep; /* -Wmissing-prototypes */
|
extern initialize_file_ftype _initialize_xstormy16_tdep; /* -Wmissing-prototypes */
|
|
|
void
|
void
|
_initialize_xstormy16_tdep (void)
|
_initialize_xstormy16_tdep (void)
|
{
|
{
|
register_gdbarch_init (bfd_arch_xstormy16, xstormy16_gdbarch_init);
|
register_gdbarch_init (bfd_arch_xstormy16, xstormy16_gdbarch_init);
|
}
|
}
|
|
|
