/* Traditional frame unwind support, for GDB the GNU Debugger.
- Copyright 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "frame.h"
#include "trad-frame.h"
#include "regcache.h"
+#include "frame-unwind.h"
+#include "value.h"
+
+struct trad_frame_cache
+{
+ struct frame_info *this_frame;
+ CORE_ADDR this_base;
+ struct trad_frame_saved_reg *prev_regs;
+ struct frame_id this_id;
+};
+
+struct trad_frame_cache *
+trad_frame_cache_zalloc (struct frame_info *this_frame)
+{
+ struct trad_frame_cache *this_trad_cache;
+
+ this_trad_cache = FRAME_OBSTACK_ZALLOC (struct trad_frame_cache);
+ this_trad_cache->prev_regs = trad_frame_alloc_saved_regs (this_frame);
+ this_trad_cache->this_frame = this_frame;
+ return this_trad_cache;
+}
/* A traditional frame is unwound by analysing the function prologue
and using the information gathered to track registers. For
for all potential instruction sequences). */
struct trad_frame_saved_reg *
-trad_frame_alloc_saved_regs (struct frame_info *next_frame)
+trad_frame_alloc_saved_regs (struct frame_info *this_frame)
{
int regnum;
- struct gdbarch *gdbarch = get_frame_arch (next_frame);
- int numregs = NUM_REGS + NUM_PSEUDO_REGS;
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ int numregs = gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch);
struct trad_frame_saved_reg *this_saved_regs
= FRAME_OBSTACK_CALLOC (numregs, struct trad_frame_saved_reg);
for (regnum = 0; regnum < numregs; regnum++)
}
void
+trad_frame_set_reg_value (struct trad_frame_cache *this_trad_cache,
+ int regnum, LONGEST val)
+{
+ /* External interface for users of trad_frame_cache
+ (who cannot access the prev_regs object directly). */
+ trad_frame_set_value (this_trad_cache->prev_regs, regnum, val);
+}
+
+void
+trad_frame_set_reg_realreg (struct trad_frame_cache *this_trad_cache,
+ int regnum, int realreg)
+{
+ this_trad_cache->prev_regs[regnum].realreg = realreg;
+ this_trad_cache->prev_regs[regnum].addr = -1;
+}
+
+void
+trad_frame_set_reg_addr (struct trad_frame_cache *this_trad_cache,
+ int regnum, CORE_ADDR addr)
+{
+ this_trad_cache->prev_regs[regnum].addr = addr;
+}
+
+void
trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
int regnum)
{
this_saved_regs[regnum].addr = -1;
}
-void
-trad_frame_prev_register (struct frame_info *next_frame,
- struct trad_frame_saved_reg this_saved_regs[],
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realregp, void *bufferp)
+struct value *
+trad_frame_get_prev_register (struct frame_info *this_frame,
+ struct trad_frame_saved_reg this_saved_regs[],
+ int regnum)
{
- struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
if (trad_frame_addr_p (this_saved_regs, regnum))
- {
- /* The register was saved in memory. */
- *optimizedp = 0;
- *lvalp = lval_memory;
- *addrp = this_saved_regs[regnum].addr;
- *realregp = -1;
- if (bufferp != NULL)
- {
- /* Read the value in from memory. */
- get_frame_memory (next_frame, this_saved_regs[regnum].addr, bufferp,
- register_size (gdbarch, regnum));
- }
- }
+ /* The register was saved in memory. */
+ return frame_unwind_got_memory (this_frame, regnum,
+ this_saved_regs[regnum].addr);
else if (trad_frame_realreg_p (this_saved_regs, regnum))
- {
- /* Ask the next frame to return the value of the register. */
- frame_register_unwind (next_frame, this_saved_regs[regnum].realreg,
- optimizedp, lvalp, addrp, realregp, bufferp);
- }
+ return frame_unwind_got_register (this_frame, regnum,
+ this_saved_regs[regnum].realreg);
else if (trad_frame_value_p (this_saved_regs, regnum))
- {
- /* The register's value is available. */
- *optimizedp = 0;
- *lvalp = not_lval;
- *addrp = 0;
- *realregp = -1;
- if (bufferp != NULL)
- store_unsigned_integer (bufferp, register_size (gdbarch, regnum),
- this_saved_regs[regnum].addr);
- }
+ /* The register's value is available. */
+ return frame_unwind_got_constant (this_frame, regnum,
+ this_saved_regs[regnum].addr);
else
- {
- error ("Register %s not available",
- gdbarch_register_name (gdbarch, regnum));
- }
+ return frame_unwind_got_optimized (this_frame, regnum);
+}
+
+struct value *
+trad_frame_get_register (struct trad_frame_cache *this_trad_cache,
+ struct frame_info *this_frame,
+ int regnum)
+{
+ return trad_frame_get_prev_register (this_frame, this_trad_cache->prev_regs,
+ regnum);
+}
+
+void
+trad_frame_set_id (struct trad_frame_cache *this_trad_cache,
+ struct frame_id this_id)
+{
+ this_trad_cache->this_id = this_id;
+}
+
+void
+trad_frame_get_id (struct trad_frame_cache *this_trad_cache,
+ struct frame_id *this_id)
+{
+ (*this_id) = this_trad_cache->this_id;
+}
+
+void
+trad_frame_set_this_base (struct trad_frame_cache *this_trad_cache,
+ CORE_ADDR this_base)
+{
+ this_trad_cache->this_base = this_base;
+}
+
+CORE_ADDR
+trad_frame_get_this_base (struct trad_frame_cache *this_trad_cache)
+{
+ return this_trad_cache->this_base;
}
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