2003-06-08 16:09:46 +00:00
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/* Traditional frame unwind support, for GDB the GNU Debugger.
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2005-12-17 22:34:03 +00:00
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Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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2003-06-08 16:09:46 +00:00
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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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2005-12-17 22:34:03 +00:00
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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2003-06-08 16:09:46 +00:00
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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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2004-03-23 13:49:50 +00:00
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struct trad_frame_cache
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{
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struct frame_info *next_frame;
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CORE_ADDR this_base;
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struct trad_frame_saved_reg *prev_regs;
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struct frame_id this_id;
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};
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struct trad_frame_cache *
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trad_frame_cache_zalloc (struct frame_info *next_frame)
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{
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struct trad_frame_cache *this_trad_cache;
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this_trad_cache = FRAME_OBSTACK_ZALLOC (struct trad_frame_cache);
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this_trad_cache->prev_regs = trad_frame_alloc_saved_regs (next_frame);
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this_trad_cache->next_frame = next_frame;
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return this_trad_cache;
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}
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2003-06-08 16:09:46 +00:00
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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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2003-06-08 22:10:12 +00:00
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struct trad_frame_saved_reg *
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2003-06-08 16:09:46 +00:00
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trad_frame_alloc_saved_regs (struct frame_info *next_frame)
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{
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2003-06-08 22:10:12 +00:00
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int regnum;
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2003-06-08 16:09:46 +00:00
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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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2003-06-08 22:10:12 +00:00
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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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2003-07-01 13:25:19 +00:00
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{
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this_saved_regs[regnum].realreg = regnum;
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this_saved_regs[regnum].addr = -1;
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}
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2003-06-08 16:09:46 +00:00
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return this_saved_regs;
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}
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2003-07-01 13:25:19 +00:00
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enum { REG_VALUE = -1, REG_UNKNOWN = -2 };
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int
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trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[], int regnum)
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{
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return (this_saved_regs[regnum].realreg == REG_VALUE);
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}
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int
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trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[], int regnum)
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{
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return (this_saved_regs[regnum].realreg >= 0
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&& this_saved_regs[regnum].addr != -1);
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}
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int
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trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[],
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int regnum)
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{
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return (this_saved_regs[regnum].realreg >= 0
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&& this_saved_regs[regnum].addr == -1);
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}
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2003-06-08 16:09:46 +00:00
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void
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2003-07-01 13:25:19 +00:00
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trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[],
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int regnum, LONGEST val)
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2003-06-08 16:09:46 +00:00
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{
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2003-07-01 13:25:19 +00:00
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/* Make the REALREG invalid, indicating that the ADDR contains the
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2003-06-08 16:09:46 +00:00
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register's value. */
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2003-07-01 13:25:19 +00:00
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this_saved_regs[regnum].realreg = REG_VALUE;
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2003-06-08 16:09:46 +00:00
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this_saved_regs[regnum].addr = val;
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}
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2005-03-05 01:57:20 +00:00
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void
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trad_frame_set_reg_value (struct trad_frame_cache *this_trad_cache,
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int regnum, LONGEST val)
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{
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/* External interface for users of trad_frame_cache
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(who cannot access the prev_regs object directly). */
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trad_frame_set_value (this_trad_cache->prev_regs, regnum, val);
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}
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2004-08-01 14:34:39 +00:00
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void
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trad_frame_set_reg_realreg (struct trad_frame_cache *this_trad_cache,
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int regnum, int realreg)
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{
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this_trad_cache->prev_regs[regnum].realreg = realreg;
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this_trad_cache->prev_regs[regnum].addr = -1;
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}
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2004-03-23 13:49:50 +00:00
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void
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trad_frame_set_reg_addr (struct trad_frame_cache *this_trad_cache,
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int regnum, CORE_ADDR addr)
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{
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this_trad_cache->prev_regs[regnum].addr = addr;
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}
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2003-07-01 13:25:19 +00:00
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void
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trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
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int regnum)
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{
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/* Make the REALREG invalid, indicating that the value is not known. */
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this_saved_regs[regnum].realreg = REG_UNKNOWN;
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this_saved_regs[regnum].addr = -1;
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}
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2003-06-08 16:09:46 +00:00
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void
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2004-07-31 21:53:17 +00:00
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trad_frame_get_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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2005-05-22 Andrew Cagney <cagney@gnu.org>
* frame.h (frame_register_unwind, frame_unwind_register)
(get_frame_register, frame_register, put_frame_register)
(get_frame_memory, safe_frame_unwind_memory)
(frame_register_read): Use gdb_byte for byte buffer parameters.
* trad-frame.h (trad_frame_get_register)
(frame_get_prev_register): Ditto.
* frame-unwind.h (frame_prev_register_ftype): Ditto.
* frame.c (frame_pop, frame_register, frame_unwind_register)
(get_frame_register, frame_unwind_register_signed)
(frame_unwind_register_unsigned, frame_unwind_unsigned_register)
(frame_register_read, get_frame_memory): Update.
* trad-frame.c (trad_frame_get_prev_register): Update.
(trad_frame_get_register): Update.
* gdbcore.h (deprecated_read_memory_nobpt, read_memory): Ditto.
* breakpoint.c (deprecated_read_memory_nobpt): Update.
* corefile.c (read_memory): Update.
* tramp-frame.c (tramp_frame_prev_register): Update.
* valops.c (value_assign): Update.
* sentinel-frame.c (sentinel_frame_prev_register): Update.
* std-regs.c (value_of_builtin_frame_fp_reg)
(value_of_builtin_frame_pc_reg): Update.
* infcmd.c (default_print_registers_info): Update
* dummy-frame.c (dummy_frame_prev_register): Update.
* findvar.c (value_of_register, value_from_register): Update.
* tui/tui-regs.c (tui_register_format, tui_get_register): Update.
* mi/mi-main.c (register_changed_p, get_register): Update.
2005-05-22 14:53:35 +00:00
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int *realregp, gdb_byte *bufferp)
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2003-06-08 16:09:46 +00:00
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{
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struct gdbarch *gdbarch = get_frame_arch (next_frame);
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2003-07-01 13:25:19 +00:00
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if (trad_frame_addr_p (this_saved_regs, regnum))
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2003-06-08 16:09:46 +00:00
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{
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2003-06-08 22:10:12 +00:00
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/* The register was saved in memory. */
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2003-06-08 16:09:46 +00:00
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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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2003-07-01 13:25:19 +00:00
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*realregp = -1;
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2003-06-08 16:09:46 +00:00
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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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2003-07-01 13:25:19 +00:00
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else if (trad_frame_realreg_p (this_saved_regs, regnum))
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2003-06-08 16:09:46 +00:00
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{
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2004-10-29 14:00:58 +00:00
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*optimizedp = 0;
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*lvalp = lval_register;
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*addrp = 0;
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*realregp = this_saved_regs[regnum].realreg;
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2003-08-20 22:30:17 +00:00
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/* Ask the next frame to return the value of the register. */
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2004-10-29 14:00:58 +00:00
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if (bufferp)
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frame_unwind_register (next_frame, (*realregp), bufferp);
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2003-06-08 16:09:46 +00:00
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}
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2003-07-01 13:25:19 +00:00
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else if (trad_frame_value_p (this_saved_regs, regnum))
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2003-06-08 16:09:46 +00:00
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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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2003-07-01 13:25:19 +00:00
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*realregp = -1;
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2003-06-08 16:09:46 +00:00
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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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2003-07-01 13:25:19 +00:00
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else
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{
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2005-02-10 Andrew Cagney <cagney@gnu.org>
Mark up all error and warning messages.
* ada-lang.c, amd64-tdep.c, arch-utils.c, breakpoint.c: Update.
* bsd-kvm.c, bsd-uthread.c, coff-solib.h, coffread.c: Update.
* core-aout.c, core-regset.c, corefile.c, corelow.c: Update.
* cp-abi.c, cp-support.c, cp-valprint.c, cris-tdep.c: Update.
* dbxread.c, demangle.c, doublest.c, dsrec.c: Update.
* dve3900-rom.c, dwarf2expr.c, dwarf2loc.c: Update.
* dwarf2read.c, dwarfread.c, elfread.c, eval.c: Update.
* event-top.c, exec.c, expprint.c, f-lang.c: Update.
* f-typeprint.c, f-valprint.c, fbsd-nat.c, findvar.c: Update.
* frame.c, frv-linux-tdep.c, gcore.c, gdbtypes.c: Update.
* gnu-nat.c, gnu-v2-abi.c, gnu-v3-abi.c, go32-nat.c: Update.
* hpacc-abi.c, hppa-hpux-nat.c, hppa-hpux-tdep.c: Update.
* hppa-linux-nat.c, hppa-linux-tdep.c, hppa-tdep.c: Update.
* hpread.c, hpux-thread.c, i386-linux-nat.c: Update.
* i386-linux-tdep.c, i386-tdep.c, i386bsd-nat.c: Update.
* i386gnu-nat.c, i387-tdep.c, ia64-linux-nat.c: Update.
* ia64-tdep.c, inf-child.c, inf-ptrace.c, inf-ttrace.c: Update.
* infcall.c, infcmd.c, inflow.c, infptrace.c, infrun.c: Update.
* inftarg.c, interps.c, irix5-nat.c, jv-lang.c: Update.
* kod-cisco.c, kod.c, language.c, libunwind-frame.c: Update.
* linespec.c, linux-nat.c, linux-thread-db.c, m2-lang.c: Update.
* m32r-rom.c, m68hc11-tdep.c, m68k-tdep.c: Update.
* m68klinux-nat.c, macrocmd.c, macroexp.c, main.c: Update.
* maint.c, mdebugread.c, mem-break.c, memattr.c: Update.
* mips-linux-tdep.c, mips-tdep.c, mipsread.c, monitor.c: Update.
* nlmread.c, nto-procfs.c, objc-lang.c, objfiles.c: Update.
* observer.c, ocd.c, p-lang.c, p-typeprint.c: Update.
* p-valprint.c, pa64solib.c, parse.c, ppc-linux-tdep.c: Update.
* ppcnbsd-tdep.c, printcmd.c, procfs.c, remote-e7000.c: Update.
* remote-fileio.c, remote-m32r-sdi.c, remote-rdi.c: Update.
* remote-rdp.c, remote-sim.c, remote-st.c: Update.
* remote-utils.c, remote-utils.h, remote.c: Update.
* rom68k-rom.c, rs6000-nat.c, s390-tdep.c, scm-lang.c: Update.
* ser-e7kpc.c, ser-tcp.c, ser-unix.c, sh-tdep.c: Update.
* sh3-rom.c, shnbsd-tdep.c, sol-thread.c, solib-aix5.c: Update.
* solib-frv.c, solib-irix.c, solib-osf.c, solib-pa64.c: Update.
* solib-som.c, solib-sunos.c, solib-svr4.c, solib.c: Update.
* somread.c, somsolib.c, source.c, stabsread.c: Update.
* stack.c, std-regs.c, symfile-mem.c, symfile.c: Update.
* symmisc.c, symtab.c, target.c, thread.c, top.c: Update.
* tracepoint.c, trad-frame.c, typeprint.c, utils.c: Update.
* uw-thread.c, valarith.c, valops.c, valprint.c: Update.
* value.c, varobj.c, version.in, win32-nat.c, wince.c: Update.
* xcoffread.c, xcoffsolib.c, cli/cli-cmds.c: Update.
* cli/cli-decode.c, cli/cli-dump.c, cli/cli-logging.c: Update.
* cli/cli-script.c, cli/cli-setshow.c, mi/mi-cmd-break.c: Update.
* mi/mi-cmd-disas.c, mi/mi-cmd-env.c, mi/mi-cmd-file.c: Update.
* mi/mi-cmd-stack.c, mi/mi-cmd-var.c, mi/mi-getopt.c: Update.
* mi/mi-symbol-cmds.c, tui/tui-layout.c, tui/tui-stack.c: Update.
* tui/tui-win.c: Update.
2005-02-11 04:06:14 +00:00
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error (_("Register %s not available"),
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2003-07-01 13:25:19 +00:00
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gdbarch_register_name (gdbarch, regnum));
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}
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2003-06-08 16:09:46 +00:00
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}
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2004-03-23 13:49:50 +00:00
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void
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trad_frame_get_register (struct trad_frame_cache *this_trad_cache,
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struct frame_info *next_frame,
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int regnum, int *optimizedp,
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enum lval_type *lvalp, CORE_ADDR *addrp,
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2005-05-22 Andrew Cagney <cagney@gnu.org>
* frame.h (frame_register_unwind, frame_unwind_register)
(get_frame_register, frame_register, put_frame_register)
(get_frame_memory, safe_frame_unwind_memory)
(frame_register_read): Use gdb_byte for byte buffer parameters.
* trad-frame.h (trad_frame_get_register)
(frame_get_prev_register): Ditto.
* frame-unwind.h (frame_prev_register_ftype): Ditto.
* frame.c (frame_pop, frame_register, frame_unwind_register)
(get_frame_register, frame_unwind_register_signed)
(frame_unwind_register_unsigned, frame_unwind_unsigned_register)
(frame_register_read, get_frame_memory): Update.
* trad-frame.c (trad_frame_get_prev_register): Update.
(trad_frame_get_register): Update.
* gdbcore.h (deprecated_read_memory_nobpt, read_memory): Ditto.
* breakpoint.c (deprecated_read_memory_nobpt): Update.
* corefile.c (read_memory): Update.
* tramp-frame.c (tramp_frame_prev_register): Update.
* valops.c (value_assign): Update.
* sentinel-frame.c (sentinel_frame_prev_register): Update.
* std-regs.c (value_of_builtin_frame_fp_reg)
(value_of_builtin_frame_pc_reg): Update.
* infcmd.c (default_print_registers_info): Update
* dummy-frame.c (dummy_frame_prev_register): Update.
* findvar.c (value_of_register, value_from_register): Update.
* tui/tui-regs.c (tui_register_format, tui_get_register): Update.
* mi/mi-main.c (register_changed_p, get_register): Update.
2005-05-22 14:53:35 +00:00
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int *realregp, gdb_byte *bufferp)
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2004-03-23 13:49:50 +00:00
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{
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2004-07-31 21:53:17 +00:00
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trad_frame_get_prev_register (next_frame, this_trad_cache->prev_regs,
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regnum, optimizedp, lvalp, addrp, realregp,
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bufferp);
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2004-03-23 13:49:50 +00:00
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}
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void
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trad_frame_set_id (struct trad_frame_cache *this_trad_cache,
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struct frame_id this_id)
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{
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this_trad_cache->this_id = this_id;
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}
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void
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trad_frame_get_id (struct trad_frame_cache *this_trad_cache,
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struct frame_id *this_id)
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{
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(*this_id) = this_trad_cache->this_id;
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}
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2004-08-01 14:34:39 +00:00
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void
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trad_frame_set_this_base (struct trad_frame_cache *this_trad_cache,
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CORE_ADDR this_base)
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{
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this_trad_cache->this_base = this_base;
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}
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CORE_ADDR
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trad_frame_get_this_base (struct trad_frame_cache *this_trad_cache)
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{
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return this_trad_cache->this_base;
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}
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