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jlechner |
/* SCARTS (32-bit) target-dependent code for GDB, the GNU debugger.
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Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
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Contributed by Martin Walter <mwalter@opencores.org>
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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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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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(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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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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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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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <inttypes.h>
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#include "demangle.h"
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#include "defs.h"
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#include "dis-asm.h"
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#include "dwarf2-frame.h"
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#include "gdb_string.h"
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#include "gdbtypes.h"
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#include "frame.h"
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#include "frame-base.h"
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#include "frame-unwind.h"
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#include "gdbcmd.h"
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#include "gdbcore.h"
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#include "inferior.h"
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#include "language.h"
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#include "objfiles.h"
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#include "regcache.h"
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#include "reggroups.h"
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#include "safe-ctype.h"
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#include "symfile.h"
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#include "symtab.h"
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#include "target.h"
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#include "trad-frame.h"
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#include "value.h"
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#include "arch-utils.h"
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#include "block.h"
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#include "scarts_32-tdep.h"
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struct scarts_32_frame_cache
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{
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CORE_ADDR base;
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struct trad_frame_saved_reg *saved_regs;
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};
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static enum return_value_convention scarts_32_return_value (struct gdbarch *gdbarch,
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struct type *type,
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struct regcache *regcache,
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gdb_byte *readbuf,
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const gdb_byte *writebuf);
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static const gdb_byte *scarts_32_breakpoint_from_pc (struct gdbarch *gdbarch,
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CORE_ADDR *bp_addr,
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int *bp_size);
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static int scarts_32_print_insn (bfd_vma vma,
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disassemble_info *info);
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static void scarts_32_pseudo_register_read (struct gdbarch *gdbarch,
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struct regcache *regcache,
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int regnum,
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gdb_byte *buf);
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static void scarts_32_pseudo_register_write (struct gdbarch *gdbarch,
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struct regcache *regcache,
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int regnum,
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const gdb_byte *buf);
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static const char *scarts_32_register_name (struct gdbarch *gdbarch,
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int regnum);
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static struct type *scarts_32_register_type (struct gdbarch *arch,
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int regnum);
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static void scarts_32_registers_info (struct gdbarch *gdbarch,
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struct ui_file *file,
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struct frame_info *frame,
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int regnum,
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int all);
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static int scarts_32_register_reggroup_p (struct gdbarch *gdbarch,
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int regnum,
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struct reggroup *group);
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static CORE_ADDR scarts_32_scan_prologue (CORE_ADDR start_pc,
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CORE_ADDR end_pc,
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struct frame_info *next_frame,
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struct scarts_32_frame_cache *this_cache);
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static CORE_ADDR scarts_32_skip_prologue (struct gdbarch *gdbarch,
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CORE_ADDR pc);
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static CORE_ADDR scarts_32_frame_align (struct gdbarch *gdbarch,
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CORE_ADDR sp);
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static CORE_ADDR scarts_32_addr_bits_remove (CORE_ADDR addr);
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static CORE_ADDR scarts_32_unwind_pc (struct gdbarch *gdbarch,
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struct frame_info *next_frame);
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static CORE_ADDR scarts_32_unwind_sp (struct gdbarch *gdbarch,
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struct frame_info *next_frame);
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static CORE_ADDR scarts_32_push_dummy_call (struct gdbarch *gdbarch,
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struct value *function,
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struct regcache *regcache,
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CORE_ADDR bp_addr,
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int nargs,
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struct value **args,
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CORE_ADDR sp,
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int struct_return,
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CORE_ADDR struct_addr);
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static struct frame_id scarts_32_unwind_dummy_id (struct gdbarch *gdbarch,
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struct frame_info *next_frame);
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static unsigned long int scarts_32_fetch_insn (struct frame_info *next_frame,
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CORE_ADDR addr);
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static int scarts_32_frame_size (struct frame_info *next_frame,
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CORE_ADDR start_addr,
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CORE_ADDR end_addr);
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static struct trad_frame_cache *scarts_32_frame_unwind_cache (struct frame_info *next_frame,
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void **this_prologue_cache);
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static void scarts_32_frame_this_id (struct frame_info *next_frame,
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void **this_prologue_cache,
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struct frame_id *this_id);
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static void scarts_32_frame_prev_register (struct frame_info *next_frame,
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void **this_prologue_cache,
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int regnum,
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int *optimizedp,
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enum lval_type *lvalp,
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CORE_ADDR *addrp,
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int *realregp,
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gdb_byte *bufferp);
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static CORE_ADDR scarts_32_frame_base_address (struct frame_info *next_frame,
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void **this_prologue_cache);
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static const struct frame_unwind *scarts_32_frame_sniffer (struct frame_info *next_frame);
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static struct gdbarch *scarts_32_gdbarch_init (struct gdbarch_info info,
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struct gdbarch_list *arches);
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static void scarts_32_dump_tdep (struct gdbarch *gdbarch,
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struct ui_file *file);
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/*----------------------------------------------------------------------------*/
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/*!Determine the return convention used for a given type
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*
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* Optionally, fetch or set the return value via "readbuf" or "writebuf"
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* respectively using "regcache" for the register values.
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*
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* Throughout use read_memory(), not target_read_memory(), since the address
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* may be invalid and we want an error reported (read_memory() is
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* target_read_memory() with error reporting).
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*
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* @param[in] gdbarch The GDB architecture being used
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* @param[in] type The type of the entity to be returned
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* @param[in] regcache The register cache
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* @param[in] readbuf Buffer into which the return value should be written
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* @param[out] writebuf Buffer from which the return value should be written
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*
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* @return The type of return value */
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/*---------------------------------------------------------------------------*/
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static enum return_value_convention
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scarts_32_return_value (struct gdbarch *gdbarch,
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struct type *type,
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struct regcache *regcache,
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gdb_byte *readbuf,
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const gdb_byte *writebuf)
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{
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unsigned int rv_size;
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ULONGEST tmp;
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rv_size = TYPE_LENGTH (type);
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if (readbuf)
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{
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regcache_cooked_read_unsigned (regcache, 0, &tmp);
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store_unsigned_integer (readbuf, rv_size, tmp);
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}
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if (writebuf)
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{
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regcache_cooked_write_unsigned (regcache, 0, unpack_long (type, writebuf));
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}
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return RETURN_VALUE_REGISTER_CONVENTION;
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}
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/*---------------------------------------------------------------------------*/
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/* !Determine the instruction to use for a breakpoint.
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*
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* Given the address at which to insert a breakpoint (bp_addr), what will that
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* breakpoint be?
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*
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* We use the ILLOP instruction to stop program execution of the simulator.
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*
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* @param[in] gdbarch The GDB architecture being used
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* @param[in] bp_addr The breakpoint address in question
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* @param[out] bp_size The size of instruction selected
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*
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* @return The chosen breakpoint instruction */
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/*---------------------------------------------------------------------------*/
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static const gdb_byte *
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scarts_32_breakpoint_from_pc (struct gdbarch *gdbarch,
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CORE_ADDR *bp_addr,
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int *bp_size)
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{
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static const gdb_byte breakpoint[] = SCARTS_ILLOP_INSN_STRUCT;
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*bp_addr += SCARTS_CODEMEM_LMA;
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*bp_size = SCARTS_INSN_SIZE;
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return breakpoint;
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}
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static int
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scarts_32_print_insn (bfd_vma memaddr, disassemble_info *info)
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{
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memaddr += SCARTS_CODEMEM_LMA;
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return print_insn_scarts_32 (memaddr, info);
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}
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/*----------------------------------------------------------------------------*/
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/*!Read a pseudo register
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*
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* Since we have no pseudo registers this is a null function for now.
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*
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* @param[in] gdbarch The GDB architecture to consider
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* @param[in] regcache The cached register values as an array
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* @param[in] regnum The register to read
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* @param[out] buf A buffer to put the result in */
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/*---------------------------------------------------------------------------*/
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static void
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scarts_32_pseudo_register_read (struct gdbarch *gdbarch,
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struct regcache *regcache,
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int regnum,
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gdb_byte *buf)
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{
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return;
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}
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/*----------------------------------------------------------------------------*/
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/*!Write a pseudo register
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*
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* Since we have no pseudo registers this is a null function for now.
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*
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* @param[in] gdbarch The GDB architecture to consider
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* @param[in] regcache The cached register values as an array
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* @param[in] regnum The register to read
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* @param[in] buf A buffer with the value to write */
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/*---------------------------------------------------------------------------*/
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static void
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scarts_32_pseudo_register_write (struct gdbarch *gdbarch,
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struct regcache *regcache,
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int regnum,
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const gdb_byte *buf)
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{
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return;
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}
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/*----------------------------------------------------------------------------*/
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/*!Return the register name for the SCARTS architecture
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*
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* This version converted to ANSI C, made static and incorporates the static
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* table of register names (this is the only place it is referenced).
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*
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* @param[in] gdbarch The GDB architecture being used
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* @param[in] regnum The register number
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*
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* @return The textual name of the register */
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/*---------------------------------------------------------------------------*/
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static const char *
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scarts_32_register_name (struct gdbarch *gdbarch,
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int regnum)
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{
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static char *scarts_32_gdb_reg_names[SCARTS_TOTAL_NUM_REGS] =
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{
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/* General Purpose Registers */
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "RTS", "RTE",
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/* Special Purpose Registers */
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"FPW (PC)", "FPX", "FPY (FP)", "FPZ (SP)",
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};
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return scarts_32_gdb_reg_names[regnum];
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}
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/*----------------------------------------------------------------------------*/
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/*!Identify the type of a register
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*
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* @todo I don't fully understand exactly what this does, but I think this
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* makes sense!
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*
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* @param[in] arch The GDB architecture to consider
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* @param[in] regnum The register to identify
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*
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* @return The type of the register */
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/*---------------------------------------------------------------------------*/
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static struct type *
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scarts_32_register_type (struct gdbarch *arch,
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int regnum)
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{
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if (regnum >= 0 && regnum < SCARTS_NUM_GP_REGS)
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{
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switch (regnum)
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{
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case SCARTS_RTS_REGNUM:
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case SCARTS_RTE_REGNUM:
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return builtin_type_void_func_ptr;
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default:
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return builtin_type_uint32;
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}
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}
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else if (regnum >= SCARTS_NUM_GP_REGS && regnum < SCARTS_TOTAL_NUM_REGS)
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{
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switch (regnum)
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{
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case SCARTS_PC_REGNUM:
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return builtin_type_void_func_ptr;
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default:
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return builtin_type_void_data_ptr;
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}
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}
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return builtin_type_uint32;
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}
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354 |
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/*----------------------------------------------------------------------------*/
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357 |
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/*!Handle the "info register" command
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*
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* Print the identified register, unless it is -1, in which case print all
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* the registers. If all is 1 means all registers, otherwise only the core
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* GPRs.
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*
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363 |
|
|
* @param[in] gdbarch The GDB architecture being used
|
364 |
|
|
* @param[in] file File handle for use with any custom I/O
|
365 |
|
|
* @param[in] frame Frame info for use with custom output
|
366 |
|
|
* @param[in] regnum Register of interest, or -1 if all registers
|
367 |
|
|
* @param[in] all 1 if all means all, 0 if all means just GPRs
|
368 |
|
|
*
|
369 |
|
|
* @return The aligned stack frame address */
|
370 |
|
|
/*---------------------------------------------------------------------------*/
|
371 |
|
|
|
372 |
|
|
static void
|
373 |
|
|
scarts_32_registers_info (struct gdbarch *gdbarch,
|
374 |
|
|
struct ui_file *file,
|
375 |
|
|
struct frame_info *frame,
|
376 |
|
|
int regnum,
|
377 |
|
|
int all)
|
378 |
|
|
{
|
379 |
|
|
if (regnum == -1)
|
380 |
|
|
{
|
381 |
|
|
unsigned int n = all ? SCARTS_NUM_REGS : SCARTS_NUM_GP_REGS;
|
382 |
|
|
|
383 |
|
|
for (regnum = 0; regnum < n; regnum++)
|
384 |
|
|
{
|
385 |
|
|
if (*(scarts_32_register_name (gdbarch, regnum)) != '\0')
|
386 |
|
|
{
|
387 |
|
|
scarts_32_registers_info (gdbarch, file, frame, regnum, all);
|
388 |
|
|
}
|
389 |
|
|
}
|
390 |
|
|
}
|
391 |
|
|
else
|
392 |
|
|
{
|
393 |
|
|
if (*(scarts_32_register_name (gdbarch, regnum)) == '\0')
|
394 |
|
|
{
|
395 |
|
|
error ("Invalid register number");
|
396 |
|
|
}
|
397 |
|
|
else
|
398 |
|
|
{
|
399 |
|
|
default_print_registers_info (gdbarch, file, frame, regnum, all);
|
400 |
|
|
}
|
401 |
|
|
}
|
402 |
|
|
}
|
403 |
|
|
|
404 |
|
|
|
405 |
|
|
/*----------------------------------------------------------------------------*/
|
406 |
|
|
/*!Identify if a register belongs to a specified group
|
407 |
|
|
*
|
408 |
|
|
* Return true if the specified register is a member of the specified
|
409 |
|
|
* register group.
|
410 |
|
|
*
|
411 |
|
|
* These are the groups of registers that can be displayed via "info reg".
|
412 |
|
|
*
|
413 |
|
|
* @param[in] gdbarch The GDB architecture to consider
|
414 |
|
|
* @param[in] regnum The register to consider
|
415 |
|
|
* @param[in] group The group to consider
|
416 |
|
|
*
|
417 |
|
|
* @return True (1) if regnum is a member of group */
|
418 |
|
|
/*---------------------------------------------------------------------------*/
|
419 |
|
|
|
420 |
|
|
static int
|
421 |
|
|
scarts_32_register_reggroup_p (struct gdbarch *gdbarch,
|
422 |
|
|
int regnum,
|
423 |
|
|
struct reggroup *group)
|
424 |
|
|
{
|
425 |
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
426 |
|
|
|
427 |
|
|
if (group == all_reggroup)
|
428 |
|
|
return (regnum >= 0 && regnum < SCARTS_TOTAL_NUM_REGS && (scarts_32_register_name (gdbarch, regnum)[0] != '\0'));
|
429 |
|
|
|
430 |
|
|
/* Registers displayed via 'info registers'. */
|
431 |
|
|
if (group == general_reggroup)
|
432 |
|
|
return (regnum >= 0 && regnum < tdep->num_gp_regs);
|
433 |
|
|
|
434 |
|
|
/* Registers displayed via 'info float' or 'info vector'. */
|
435 |
|
|
else if (group == float_reggroup || group == vector_reggroup)
|
436 |
|
|
return 0;
|
437 |
|
|
|
438 |
|
|
return default_register_reggroup_p (gdbarch, regnum, group);
|
439 |
|
|
}
|
440 |
|
|
|
441 |
|
|
|
442 |
|
|
/*----------------------------------------------------------------------------*/
|
443 |
|
|
/*!Skip a function prolog
|
444 |
|
|
*
|
445 |
|
|
* If the input address, PC, is in a function prologue, return the address of
|
446 |
|
|
* the end of the prologue, otherwise return the input address.
|
447 |
|
|
*
|
448 |
|
|
* @param[in] gdbarch The GDB architecture being used
|
449 |
|
|
* @param[in] pc Current program counter
|
450 |
|
|
*
|
451 |
|
|
* @return The address of the end of the prolog if the PC is in a function
|
452 |
|
|
* prologue, otherwise the input address. */
|
453 |
|
|
/*--------------------------------------------------------------------------*/
|
454 |
|
|
|
455 |
|
|
static CORE_ADDR
|
456 |
|
|
scarts_32_skip_prologue (struct gdbarch *gdbarch,
|
457 |
|
|
CORE_ADDR pc)
|
458 |
|
|
{
|
459 |
|
|
CORE_ADDR start_addr, end_addr;
|
460 |
|
|
|
461 |
|
|
/* Determine the end of the prologue from the line number information held
|
462 |
|
|
* for debugging purposes in the symbol table (symbol-and-line information,
|
463 |
|
|
* SAL). */
|
464 |
|
|
if (find_pc_partial_function (pc, NULL, &start_addr, &end_addr))
|
465 |
|
|
{
|
466 |
|
|
CORE_ADDR pc_after_prologue = skip_prologue_using_sal (start_addr);
|
467 |
|
|
|
468 |
|
|
/* Return the PC or the PC after the prologue, whichever is greater. */
|
469 |
|
|
if (pc_after_prologue != 0)
|
470 |
|
|
return max (pc, pc_after_prologue);
|
471 |
|
|
}
|
472 |
|
|
|
473 |
|
|
return pc;
|
474 |
|
|
}
|
475 |
|
|
|
476 |
|
|
|
477 |
|
|
/*----------------------------------------------------------------------------*/
|
478 |
|
|
/*!Align the stack frame
|
479 |
|
|
*
|
480 |
|
|
* SCARTS uses a falling stack frame, so this aligns down to the
|
481 |
|
|
* nearest SCARTS_STACK_ALIGN bytes.
|
482 |
|
|
*
|
483 |
|
|
* @param[in] gdbarch The GDB architecture being used
|
484 |
|
|
* @param[in] sp Current stack pointer
|
485 |
|
|
*
|
486 |
|
|
* @return The aligned stack frame address */
|
487 |
|
|
/*---------------------------------------------------------------------------*/
|
488 |
|
|
|
489 |
|
|
static CORE_ADDR
|
490 |
|
|
scarts_32_frame_align (struct gdbarch *gdbarch,
|
491 |
|
|
CORE_ADDR sp)
|
492 |
|
|
{
|
493 |
|
|
return align_down (sp, SCARTS_STACK_ALIGN);
|
494 |
|
|
}
|
495 |
|
|
|
496 |
|
|
|
497 |
|
|
static CORE_ADDR
|
498 |
|
|
scarts_32_addr_bits_remove (CORE_ADDR addr)
|
499 |
|
|
{
|
500 |
|
|
return (addr >= SCARTS_CODEMEM_LMA) ? addr - SCARTS_CODEMEM_LMA : addr;
|
501 |
|
|
}
|
502 |
|
|
|
503 |
|
|
/*----------------------------------------------------------------------------*/
|
504 |
|
|
/*!Unwind the program counter from a stack frame
|
505 |
|
|
*
|
506 |
|
|
* This just uses the built in frame unwinder
|
507 |
|
|
*
|
508 |
|
|
* @param[in] gdbarch The GDB architecture being used
|
509 |
|
|
* @param[in] next_frame Frame info for the NEXT frame
|
510 |
|
|
*
|
511 |
|
|
* @return The program counter for THIS frame */
|
512 |
|
|
/*---------------------------------------------------------------------------*/
|
513 |
|
|
|
514 |
|
|
static CORE_ADDR
|
515 |
|
|
scarts_32_unwind_pc (struct gdbarch *gdbarch,
|
516 |
|
|
struct frame_info *next_frame)
|
517 |
|
|
{
|
518 |
|
|
return frame_unwind_register_unsigned (next_frame, SCARTS_PC_REGNUM);
|
519 |
|
|
}
|
520 |
|
|
|
521 |
|
|
|
522 |
|
|
/*----------------------------------------------------------------------------*/
|
523 |
|
|
/*!Unwind the stack pointer from a stack frame
|
524 |
|
|
*
|
525 |
|
|
* This just uses the built in frame unwinder
|
526 |
|
|
*
|
527 |
|
|
* @param[in] gdbarch The GDB architecture being used
|
528 |
|
|
* @param[in] next_frame Frame info for the NEXT frame
|
529 |
|
|
*
|
530 |
|
|
* @return The stack pointer for THIS frame */
|
531 |
|
|
/*---------------------------------------------------------------------------*/
|
532 |
|
|
|
533 |
|
|
static CORE_ADDR
|
534 |
|
|
scarts_32_unwind_sp (struct gdbarch *gdbarch,
|
535 |
|
|
struct frame_info *next_frame)
|
536 |
|
|
{
|
537 |
|
|
return frame_unwind_register_unsigned (next_frame, SCARTS_SP_REGNUM);
|
538 |
|
|
}
|
539 |
|
|
|
540 |
|
|
/*----------------------------------------------------------------------------*/
|
541 |
|
|
/*!Create a dummy stack frame
|
542 |
|
|
|
543 |
|
|
The arguments are placed in registers and/or pushed on the stack as per the
|
544 |
|
|
SCARTS ABI.
|
545 |
|
|
|
546 |
|
|
@param[in] gdbarch The architecture to use
|
547 |
|
|
@param[in] function Pointer to the function that will be called
|
548 |
|
|
@param[in] regcache The register cache to use
|
549 |
|
|
@param[in] bp_addr Breakpoint address
|
550 |
|
|
@param[in] nargs Number of ags to push
|
551 |
|
|
@param[in] args The arguments
|
552 |
|
|
@param[in] sp The stack pointer
|
553 |
|
|
@param[in] struct_return True (1) if this returns a structure
|
554 |
|
|
@param[in] struct_addr Address for returning structures
|
555 |
|
|
|
556 |
|
|
@return The updated stack pointer */
|
557 |
|
|
/*---------------------------------------------------------------------------*/
|
558 |
|
|
|
559 |
|
|
static CORE_ADDR scarts_32_push_dummy_call (struct gdbarch *gdbarch,
|
560 |
|
|
struct value *function,
|
561 |
|
|
struct regcache *regcache,
|
562 |
|
|
CORE_ADDR bp_addr,
|
563 |
|
|
int nargs,
|
564 |
|
|
struct value **args,
|
565 |
|
|
CORE_ADDR sp,
|
566 |
|
|
int struct_return,
|
567 |
|
|
CORE_ADDR struct_addr)
|
568 |
|
|
{
|
569 |
|
|
return 0;
|
570 |
|
|
}
|
571 |
|
|
|
572 |
|
|
|
573 |
|
|
/*----------------------------------------------------------------------------*/
|
574 |
|
|
/*!Unwind a dummy stack frame
|
575 |
|
|
|
576 |
|
|
@param[in] gdbarch The architecture to use
|
577 |
|
|
@param[in] next_frame Information about the next frame
|
578 |
|
|
|
579 |
|
|
@return Frame ID of the preceding frame */
|
580 |
|
|
/*---------------------------------------------------------------------------*/
|
581 |
|
|
|
582 |
|
|
static struct frame_id scarts_32_unwind_dummy_id (struct gdbarch *gdbarch,
|
583 |
|
|
struct frame_info *next_frame)
|
584 |
|
|
{
|
585 |
|
|
return frame_id_build (0, 0);
|
586 |
|
|
}
|
587 |
|
|
|
588 |
|
|
|
589 |
|
|
/*----------------------------------------------------------------------------*/
|
590 |
|
|
/*!Initialize a prologue (unwind) cache
|
591 |
|
|
|
592 |
|
|
Build up the information (saved registers etc) for the given frame if it
|
593 |
|
|
does not already exist.
|
594 |
|
|
|
595 |
|
|
@param[in] next_frame The NEXT frame (i.e. inner from here,
|
596 |
|
|
the one THIS frame called)
|
597 |
|
|
@param[in,out] this_prologue_cache The prologue cache. If not supplied, we
|
598 |
|
|
build it.
|
599 |
|
|
|
600 |
|
|
@return The prolog cache (duplicates the return through the argument) */
|
601 |
|
|
/*---------------------------------------------------------------------------*/
|
602 |
|
|
|
603 |
|
|
static struct trad_frame_cache *
|
604 |
|
|
scarts_32_frame_unwind_cache (struct frame_info *next_frame,
|
605 |
|
|
void **this_prologue_cache)
|
606 |
|
|
{
|
607 |
|
|
struct trad_frame_cache *info;
|
608 |
|
|
|
609 |
|
|
if (*this_prologue_cache != NULL)
|
610 |
|
|
return *this_prologue_cache;
|
611 |
|
|
|
612 |
|
|
info = trad_frame_cache_zalloc (next_frame);
|
613 |
|
|
*this_prologue_cache = info;
|
614 |
|
|
|
615 |
|
|
return info;
|
616 |
|
|
}
|
617 |
|
|
|
618 |
|
|
|
619 |
|
|
/*----------------------------------------------------------------------------*/
|
620 |
|
|
/*!Find the frame ID of this frame
|
621 |
|
|
*
|
622 |
|
|
* Given a GDB frame (called by THIS frame), determine the address of oru
|
623 |
|
|
* frame and from this create a new GDB frame struct. The info required is
|
624 |
|
|
* obtained from the prologue cache for THIS frame.
|
625 |
|
|
*
|
626 |
|
|
* @param[in] next_frame The NEXT frame (i.e. inner from here, the
|
627 |
|
|
* one THIS frame called)
|
628 |
|
|
* @param[in] this_prologue_cache Any cached prologue for THIS function.
|
629 |
|
|
* @param[out]this_id Frame ID of our own frame.
|
630 |
|
|
*
|
631 |
|
|
* @return Frame ID for THIS frame */
|
632 |
|
|
/*---------------------------------------------------------------------------*/
|
633 |
|
|
|
634 |
|
|
static void
|
635 |
|
|
scarts_32_frame_this_id (struct frame_info *next_frame,
|
636 |
|
|
void **this_prologue_cache,
|
637 |
|
|
struct frame_id *this_id)
|
638 |
|
|
{
|
639 |
|
|
struct trad_frame_cache *info = scarts_32_frame_unwind_cache (next_frame, this_prologue_cache);
|
640 |
|
|
trad_frame_get_id (info, this_id);
|
641 |
|
|
}
|
642 |
|
|
|
643 |
|
|
|
644 |
|
|
/*----------------------------------------------------------------------------*/
|
645 |
|
|
/*!Get a register from THIS frame
|
646 |
|
|
*
|
647 |
|
|
* Given a pointer to the NEXT frame, return the details of a register in the
|
648 |
|
|
* PREVIOUS frame.
|
649 |
|
|
*
|
650 |
|
|
* @param[in] next_frame The NEXT frame (i.e. inner from here, the
|
651 |
|
|
* one THIS frame called).
|
652 |
|
|
* @param[in] this_prologue_cache Any cached prologue associated with THIS
|
653 |
|
|
* frame, which may therefore tell us about
|
654 |
|
|
* registers in the PREVIOUS frame.
|
655 |
|
|
* @param[in] regnum The register of interest in the PREVIOUS
|
656 |
|
|
* frame.
|
657 |
|
|
* @param[out] optimizedp True (1) if the register has been
|
658 |
|
|
* optimized out.
|
659 |
|
|
* @param[out] lvalp What sort of l-value (if any) does the
|
660 |
|
|
* register represent.
|
661 |
|
|
* @param[out] addrp Address in THIS frame where the register's
|
662 |
|
|
* value may be found (-1 if not available).
|
663 |
|
|
* @param[out] realregp Register in this frame where the
|
664 |
|
|
* register's value may be found (-1 if not
|
665 |
|
|
* available).
|
666 |
|
|
* @param[out] bufferp If non-NULL, buffer where the value held
|
667 |
|
|
* in the register may be put */
|
668 |
|
|
/*--------------------------------------------------------------------------*/
|
669 |
|
|
|
670 |
|
|
static void
|
671 |
|
|
scarts_32_frame_prev_register (struct frame_info *next_frame,
|
672 |
|
|
void **this_prologue_cache,
|
673 |
|
|
int regnum,
|
674 |
|
|
int *optimizedp,
|
675 |
|
|
enum lval_type *lvalp,
|
676 |
|
|
CORE_ADDR *addrp,
|
677 |
|
|
int *realregp,
|
678 |
|
|
gdb_byte *bufferp)
|
679 |
|
|
{
|
680 |
|
|
struct trad_frame_cache *info = scarts_32_frame_unwind_cache (next_frame, this_prologue_cache);
|
681 |
|
|
trad_frame_get_register (info, next_frame, regnum, optimizedp, lvalp, addrp, realregp, bufferp);
|
682 |
|
|
}
|
683 |
|
|
|
684 |
|
|
|
685 |
|
|
/*----------------------------------------------------------------------------*/
|
686 |
|
|
/*!Return the base address of the frame
|
687 |
|
|
*
|
688 |
|
|
* The commenting in the GDB source code could mean our stack pointer or our
|
689 |
|
|
* frame pointer, since we have a falling stack, but index within the frame
|
690 |
|
|
* using negative offsets from the FP.
|
691 |
|
|
*
|
692 |
|
|
* This seems to be the function used to determine the value of $fp, but the
|
693 |
|
|
* value required seems to be the stack pointer, so we return that, even if
|
694 |
|
|
* the value of $fp will be wrong.
|
695 |
|
|
*
|
696 |
|
|
* @param[in] next_frame The NEXT frame (i.e. inner from here, the
|
697 |
|
|
* one THIS frame called).
|
698 |
|
|
* @param[in] this_prologue_cache Any cached prologue for THIS function.
|
699 |
|
|
*
|
700 |
|
|
* @return The frame base address */
|
701 |
|
|
/*---------------------------------------------------------------------------*/
|
702 |
|
|
|
703 |
|
|
static CORE_ADDR
|
704 |
|
|
scarts_32_frame_base_address (struct frame_info *next_frame,
|
705 |
|
|
void **this_prologue_cache)
|
706 |
|
|
{
|
707 |
|
|
return frame_unwind_register_unsigned (next_frame, SCARTS_SP_REGNUM);
|
708 |
|
|
}
|
709 |
|
|
|
710 |
|
|
|
711 |
|
|
static CORE_ADDR
|
712 |
|
|
scarts_32_frame_locals_address (struct frame_info *next_frame,
|
713 |
|
|
void **this_prologue_cache)
|
714 |
|
|
{
|
715 |
|
|
return frame_unwind_register_unsigned (next_frame, SCARTS_FP_REGNUM);
|
716 |
|
|
}
|
717 |
|
|
|
718 |
|
|
|
719 |
|
|
static CORE_ADDR
|
720 |
|
|
scarts_32_frame_args_address (struct frame_info *next_frame,
|
721 |
|
|
void **this_prologue_cache)
|
722 |
|
|
{
|
723 |
|
|
return scarts_32_frame_base_address (next_frame, this_prologue_cache);
|
724 |
|
|
}
|
725 |
|
|
|
726 |
|
|
|
727 |
|
|
/*----------------------------------------------------------------------------*/
|
728 |
|
|
/*!The SCARTS registered frame sniffer
|
729 |
|
|
*
|
730 |
|
|
* This function just identifies our family of frame sniffing functions.
|
731 |
|
|
*
|
732 |
|
|
* @param[in] next_frame The "next" (i.e. inner, newer from here, the one
|
733 |
|
|
* THIS frame called) frame.
|
734 |
|
|
*
|
735 |
|
|
* @return A pointer to a struct identifying the sniffing functions */
|
736 |
|
|
/*---------------------------------------------------------------------------*/
|
737 |
|
|
|
738 |
|
|
static const struct frame_unwind *
|
739 |
|
|
scarts_32_frame_sniffer (struct frame_info *next_frame)
|
740 |
|
|
{
|
741 |
|
|
static const struct frame_unwind scarts_32_frame_unwind =
|
742 |
|
|
{
|
743 |
|
|
.type = NORMAL_FRAME,
|
744 |
|
|
.this_id = scarts_32_frame_this_id,
|
745 |
|
|
.prev_register = scarts_32_frame_prev_register,
|
746 |
|
|
.unwind_data = NULL,
|
747 |
|
|
.sniffer = NULL,
|
748 |
|
|
.prev_pc = NULL,
|
749 |
|
|
.dealloc_cache = NULL
|
750 |
|
|
};
|
751 |
|
|
|
752 |
|
|
return &scarts_32_frame_unwind;
|
753 |
|
|
}
|
754 |
|
|
|
755 |
|
|
static struct gdbarch *
|
756 |
|
|
scarts_32_gdbarch_init (struct gdbarch_info info,
|
757 |
|
|
struct gdbarch_list *arches)
|
758 |
|
|
{
|
759 |
|
|
static struct frame_base scarts_32_frame_base;
|
760 |
|
|
struct gdbarch *gdbarch;
|
761 |
|
|
struct gdbarch_tdep *tdep;
|
762 |
|
|
const struct bfd_arch_info *binfo;
|
763 |
|
|
|
764 |
|
|
binfo = info.bfd_arch_info;
|
765 |
|
|
tdep = xmalloc (sizeof *tdep);
|
766 |
|
|
tdep->num_gp_regs = SCARTS_NUM_GP_REGS;
|
767 |
|
|
tdep->num_sp_regs = SCARTS_NUM_SP_REGS;
|
768 |
|
|
tdep->num_pseudo_regs = SCARTS_NUM_PSEUDO_REGS;
|
769 |
|
|
tdep->pc_regnum = SCARTS_PC_REGNUM;
|
770 |
|
|
tdep->fp_regnum = SCARTS_FP_REGNUM;
|
771 |
|
|
tdep->sp_regnum = SCARTS_SP_REGNUM;
|
772 |
|
|
tdep->bytes_per_word = binfo->bits_per_word / binfo->bits_per_byte;
|
773 |
|
|
tdep->bytes_per_address = binfo->bits_per_address / binfo->bits_per_byte;
|
774 |
|
|
gdbarch = gdbarch_alloc (&info, tdep);
|
775 |
|
|
|
776 |
|
|
/* Target data types. */
|
777 |
|
|
set_gdbarch_short_bit (gdbarch, 16);
|
778 |
|
|
set_gdbarch_int_bit (gdbarch, 32);
|
779 |
|
|
set_gdbarch_long_bit (gdbarch, 32);
|
780 |
|
|
set_gdbarch_long_long_bit (gdbarch, 64);
|
781 |
|
|
set_gdbarch_float_bit (gdbarch, 32);
|
782 |
|
|
set_gdbarch_float_format (gdbarch, floatformats_ieee_single);
|
783 |
|
|
set_gdbarch_double_bit (gdbarch, 64);
|
784 |
|
|
set_gdbarch_double_format (gdbarch, floatformats_ieee_double);
|
785 |
|
|
set_gdbarch_long_double_bit (gdbarch, 64);
|
786 |
|
|
set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
|
787 |
|
|
set_gdbarch_ptr_bit (gdbarch, binfo->bits_per_address);
|
788 |
|
|
set_gdbarch_addr_bit (gdbarch, binfo->bits_per_address);
|
789 |
|
|
set_gdbarch_char_signed (gdbarch, 1);
|
790 |
|
|
|
791 |
|
|
/* Information about the target architecture. */
|
792 |
|
|
set_gdbarch_return_value (gdbarch, scarts_32_return_value);
|
793 |
|
|
set_gdbarch_breakpoint_from_pc (gdbarch, scarts_32_breakpoint_from_pc);
|
794 |
|
|
set_gdbarch_print_insn (gdbarch, scarts_32_print_insn);
|
795 |
|
|
|
796 |
|
|
/* Register architecture. */
|
797 |
|
|
set_gdbarch_pseudo_register_read (gdbarch, scarts_32_pseudo_register_read);
|
798 |
|
|
set_gdbarch_pseudo_register_write (gdbarch, scarts_32_pseudo_register_write);
|
799 |
|
|
set_gdbarch_num_regs (gdbarch, SCARTS_NUM_REGS);
|
800 |
|
|
set_gdbarch_num_pseudo_regs (gdbarch, SCARTS_NUM_PSEUDO_REGS);
|
801 |
|
|
set_gdbarch_sp_regnum (gdbarch, SCARTS_SP_REGNUM);
|
802 |
|
|
set_gdbarch_pc_regnum (gdbarch, SCARTS_PC_REGNUM);
|
803 |
|
|
set_gdbarch_deprecated_fp_regnum (gdbarch, SCARTS_FP_REGNUM);
|
804 |
|
|
|
805 |
|
|
/* Functions to supply register information. */
|
806 |
|
|
set_gdbarch_register_name (gdbarch, scarts_32_register_name);
|
807 |
|
|
set_gdbarch_register_type (gdbarch, scarts_32_register_type);
|
808 |
|
|
set_gdbarch_print_registers_info (gdbarch, scarts_32_registers_info);
|
809 |
|
|
set_gdbarch_register_reggroup_p (gdbarch, scarts_32_register_reggroup_p);
|
810 |
|
|
|
811 |
|
|
/* Functions to analyse frames. */
|
812 |
|
|
set_gdbarch_skip_prologue (gdbarch, scarts_32_skip_prologue);
|
813 |
|
|
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
814 |
|
|
set_gdbarch_frame_align (gdbarch, scarts_32_frame_align);
|
815 |
|
|
set_gdbarch_frame_red_zone_size (gdbarch, SCARTS_FRAME_RED_ZONE_SIZE);
|
816 |
|
|
|
817 |
|
|
/* Functions to handle addresses. */
|
818 |
|
|
set_gdbarch_addr_bits_remove (gdbarch, scarts_32_addr_bits_remove);
|
819 |
|
|
|
820 |
|
|
/* Functions to access frame data. */
|
821 |
|
|
set_gdbarch_unwind_pc (gdbarch, scarts_32_unwind_pc);
|
822 |
|
|
set_gdbarch_unwind_sp (gdbarch, scarts_32_unwind_sp);
|
823 |
|
|
|
824 |
|
|
/* Functions handling dummy frames. */
|
825 |
|
|
set_gdbarch_push_dummy_call (gdbarch, scarts_32_push_dummy_call);
|
826 |
|
|
set_gdbarch_unwind_dummy_id (gdbarch, scarts_32_unwind_dummy_id);
|
827 |
|
|
|
828 |
|
|
/* High level frame base sniffer. */
|
829 |
|
|
scarts_32_frame_base.unwind = scarts_32_frame_sniffer (NULL);
|
830 |
|
|
scarts_32_frame_base.this_base = scarts_32_frame_base_address;
|
831 |
|
|
scarts_32_frame_base.this_locals = scarts_32_frame_locals_address;
|
832 |
|
|
scarts_32_frame_base.this_args = scarts_32_frame_args_address;
|
833 |
|
|
frame_base_set_default (gdbarch, &scarts_32_frame_base);
|
834 |
|
|
|
835 |
|
|
/* Low level frame sniffers. */
|
836 |
|
|
frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
|
837 |
|
|
frame_unwind_append_sniffer (gdbarch, scarts_32_frame_sniffer);
|
838 |
|
|
|
839 |
|
|
return gdbarch;
|
840 |
|
|
}
|
841 |
|
|
|
842 |
|
|
|
843 |
|
|
/*----------------------------------------------------------------------------*/
|
844 |
|
|
/*!Dump the target specific data for this architecture
|
845 |
|
|
*
|
846 |
|
|
* @param[in] gdbarch The architecture of interest
|
847 |
|
|
* @param[in] file Where to dump the data */
|
848 |
|
|
/*---------------------------------------------------------------------------*/
|
849 |
|
|
|
850 |
|
|
static void
|
851 |
|
|
scarts_32_dump_tdep (struct gdbarch *gdbarch,
|
852 |
|
|
struct ui_file *file)
|
853 |
|
|
{
|
854 |
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
855 |
|
|
|
856 |
|
|
if (tdep == NULL)
|
857 |
|
|
return;
|
858 |
|
|
|
859 |
|
|
fprintf_unfiltered (file, "scarts_32_dump_tdep: %d general purpose registers\n", tdep->num_gp_regs);
|
860 |
|
|
fprintf_unfiltered (file, "scarts_32_dump_tdep: %d special purpose registers\n", tdep->num_sp_regs);
|
861 |
|
|
fprintf_unfiltered (file, "scarts_32_dump_tdep: %d pseudo registers\n", tdep->num_pseudo_regs);
|
862 |
|
|
fprintf_unfiltered (file, "scarts_32_dump_tdep: %d is the PC register\n", tdep->pc_regnum);
|
863 |
|
|
fprintf_unfiltered (file, "scarts_32_dump_tdep: %d is the FP register\n", tdep->fp_regnum);
|
864 |
|
|
fprintf_unfiltered (file, "scarts_32_dump_tdep: %d is the SP register\n", tdep->sp_regnum);
|
865 |
|
|
fprintf_unfiltered (file, "scarts_32_dump_tdep: %d bytes per word\n", tdep->bytes_per_word);
|
866 |
|
|
fprintf_unfiltered (file, "scarts_32_dump_tdep: %d bytes per address\n", tdep->bytes_per_address);
|
867 |
|
|
}
|
868 |
|
|
|
869 |
|
|
|
870 |
|
|
/*----------------------------------------------------------------------------*/
|
871 |
|
|
/*!Main entry point for target architecture initialization
|
872 |
|
|
*
|
873 |
|
|
* In this version initializes the architecture via
|
874 |
|
|
* registers_gdbarch_init(). Add a command to set and show special purpose
|
875 |
|
|
* registers. */
|
876 |
|
|
/*---------------------------------------------------------------------------*/
|
877 |
|
|
|
878 |
|
|
void
|
879 |
|
|
_initialize_scarts_32_tdep (void)
|
880 |
|
|
{
|
881 |
|
|
gdbarch_register (bfd_arch_scarts_32, scarts_32_gdbarch_init, scarts_32_dump_tdep);
|
882 |
|
|
}
|
883 |
|
|
|