8983bd8343
* trad-frame.h (struct trad_frame_saved_reg): Rename "struct trad_frame". Update comments. * d10v-tdep.c (struct d10v_unwind_cache): Update. * trad-frame.c (trad_frame_alloc_saved_regs): Update. (trad_frame_register_value, trad_frame_prev_register): Update.
96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/* Traditional frame unwind support, for GDB the GNU Debugger.
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Copyright 2003 Free Software Foundation, Inc.
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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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "frame.h"
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#include "trad-frame.h"
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#include "regcache.h"
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/* A traditional frame is unwound by analysing the function prologue
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and using the information gathered to track registers. For
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non-optimized frames, the technique is reliable (just need to check
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for all potential instruction sequences). */
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struct trad_frame_saved_reg *
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trad_frame_alloc_saved_regs (struct frame_info *next_frame)
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{
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int regnum;
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struct gdbarch *gdbarch = get_frame_arch (next_frame);
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int numregs = NUM_REGS + NUM_PSEUDO_REGS;
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struct trad_frame_saved_reg *this_saved_regs
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= FRAME_OBSTACK_CALLOC (numregs, struct trad_frame_saved_reg);
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for (regnum = 0; regnum < numregs; regnum++)
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this_saved_regs[regnum].realnum = regnum;
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return this_saved_regs;
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}
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void
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trad_frame_register_value (struct trad_frame_saved_reg this_saved_regs[],
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int regnum, LONGEST val)
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{
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/* Make the REALNUM invalid, indicating that the ADDR contains the
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register's value. */
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this_saved_regs[regnum].realnum = -1;
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this_saved_regs[regnum].addr = val;
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}
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void
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trad_frame_prev_register (struct frame_info *next_frame,
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struct trad_frame_saved_reg this_saved_regs[],
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int regnum, int *optimizedp,
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enum lval_type *lvalp, CORE_ADDR *addrp,
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int *realnump, void *bufferp)
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{
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struct gdbarch *gdbarch = get_frame_arch (next_frame);
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if (this_saved_regs[regnum].realnum >= 0
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&& this_saved_regs[regnum].addr != 0)
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{
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/* The register was saved in memory. */
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*optimizedp = 0;
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*lvalp = lval_memory;
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*addrp = this_saved_regs[regnum].addr;
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*realnump = -1;
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if (bufferp != NULL)
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{
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/* Read the value in from memory. */
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get_frame_memory (next_frame, this_saved_regs[regnum].addr, bufferp,
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register_size (gdbarch, regnum));
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}
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}
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else if (this_saved_regs[regnum].realnum >= 0
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&& this_saved_regs[regnum].addr == 0)
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{
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/* As the next frame to return the value of the register. */
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frame_register_unwind (next_frame, this_saved_regs[regnum].realnum,
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optimizedp, lvalp, addrp, realnump, bufferp);
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}
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else
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{
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/* The register's value is available. */
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*optimizedp = 0;
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*lvalp = not_lval;
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*addrp = 0;
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*realnump = -1;
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if (bufferp != NULL)
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store_unsigned_integer (bufferp, register_size (gdbarch, regnum),
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this_saved_regs[regnum].addr);
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}
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}
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