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2003-06-08 Andrew Cagney <cagney@redhat.com>

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* Makefile.in (d10v-tdep.o): Update dependencies.
	(SFILES): Add trad-frame.c.
	(trad_frame_h): Define.
	(COMMON_OBS): Add trad-frame.o.
	(trad-frame.o): Specify dependencies.
	* d10v-tdep.c: Include "trad-frame.h".
	(saved_regs_unwinder): Delete function.
	(d10v_frame_prev_register): Use trad_frame_prev_register.
	(struct d10v_unwind_cache): Change type of "saved_regs" to "struct
	trad_frame", delete "regs" and "prev_sp".
	(prologue_find_regs): Use trad-frame.
	* trad-frame.h, trad-frame.c: New files.
This commit is contained in:
Andrew Cagney
2003-06-08 16:09:46 +00:00
parent 0b9a4d73a8
commit a0f267c701
5 changed files with 209 additions and 97 deletions
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124
gdb/d10v-tdep.c
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@@ -44,6 +44,7 @@
#include "gdb/sim-d10v.h"
#include "sim-regno.h"
#include "disasm.h"
#include "trad-frame.h"
#include "gdb_assert.h"
@@ -569,14 +570,14 @@ struct d10v_unwind_cache
/* The frame's base, optionally used by the high-level debug info. */
CORE_ADDR base;
int size;
CORE_ADDR *saved_regs;
/* How far the SP and r11 (FP) have been offset from the start of
the stack frame (as defined by the previous frame's stack
pointer). */
LONGEST sp_offset;
LONGEST r11_offset;
int uses_frame;
void **regs;
/* Table indicating the location of each and every register. */
struct trad_frame *saved_regs;
};
static int
@@ -590,7 +591,7 @@ prologue_find_regs (struct d10v_unwind_cache *info, unsigned short op,
{
n = (op & 0x1E0) >> 5;
info->sp_offset -= 2;
info->saved_regs[n] = info->sp_offset;
info->saved_regs[n].addr = info->sp_offset;
return 1;
}
@@ -599,8 +600,8 @@ prologue_find_regs (struct d10v_unwind_cache *info, unsigned short op,
{
n = (op & 0x1E0) >> 5;
info->sp_offset -= 4;
info->saved_regs[n] = info->sp_offset;
info->saved_regs[n + 1] = info->sp_offset + 2;
info->saved_regs[n + 0].addr = info->sp_offset + 0;
info->saved_regs[n + 1].addr = info->sp_offset + 2;
return 1;
}
@@ -626,7 +627,7 @@ prologue_find_regs (struct d10v_unwind_cache *info, unsigned short op,
if ((op & 0x7E1F) == 0x6816)
{
n = (op & 0x1E0) >> 5;
info->saved_regs[n] = info->r11_offset;
info->saved_regs[n].addr = info->r11_offset;
return 1;
}
@@ -638,7 +639,7 @@ prologue_find_regs (struct d10v_unwind_cache *info, unsigned short op,
if ((op & 0x7E1F) == 0x681E)
{
n = (op & 0x1E0) >> 5;
info->saved_regs[n] = info->sp_offset;
info->saved_regs[n].addr = info->sp_offset;
return 1;
}
@@ -646,8 +647,8 @@ prologue_find_regs (struct d10v_unwind_cache *info, unsigned short op,
if ((op & 0x7E3F) == 0x3A1E)
{
n = (op & 0x1E0) >> 5;
info->saved_regs[n] = info->sp_offset;
info->saved_regs[n + 1] = info->sp_offset + 2;
info->saved_regs[n + 0].addr = info->sp_offset + 0;
info->saved_regs[n + 1].addr = info->sp_offset + 2;
return 1;
}
@@ -678,7 +679,7 @@ d10v_frame_unwind_cache (struct frame_info *next_frame,
info = FRAME_OBSTACK_ZALLOC (struct d10v_unwind_cache);
(*this_prologue_cache) = info;
info->saved_regs = FRAME_OBSTACK_CALLOC (NUM_REGS, CORE_ADDR);
info->saved_regs = trad_frame_alloc_saved_regs (next_frame);
info->size = 0;
info->sp_offset = 0;
@@ -703,15 +704,15 @@ d10v_frame_unwind_cache (struct frame_info *next_frame,
/* st rn, @(offset,sp) */
short offset = op & 0xFFFF;
short n = (op >> 20) & 0xF;
info->saved_regs[n] = info->sp_offset + offset;
info->saved_regs[n].addr = info->sp_offset + offset;
}
else if ((op & 0x3F1F0000) == 0x350F0000)
{
/* st2w rn, @(offset,sp) */
short offset = op & 0xFFFF;
short n = (op >> 20) & 0xF;
info->saved_regs[n] = info->sp_offset + offset;
info->saved_regs[n + 1] = info->sp_offset + offset + 2;
info->saved_regs[n + 0].addr = info->sp_offset + offset + 0;
info->saved_regs[n + 1].addr = info->sp_offset + offset + 2;
}
else
break;
@@ -737,7 +738,8 @@ d10v_frame_unwind_cache (struct frame_info *next_frame,
info->size = -info->sp_offset;
/* Compute the frame's base, and the previous frame's SP. */
/* Compute the previous frame's stack pointer (which is also the
frame's ID's stack address), and this frame's base pointer. */
if (info->uses_frame)
{
/* The SP was moved to the FP. This indicates that a new frame
@@ -748,16 +750,6 @@ d10v_frame_unwind_cache (struct frame_info *next_frame,
to before the first saved register giving the SP. */
prev_sp = this_base + info->size;
}
else if (info->saved_regs[D10V_SP_REGNUM])
{
/* The SP was saved (which is very unusual), the frame base is
just the PREV's frame's TOP-OF-STACK. */
this_base
= get_frame_memory_unsigned (next_frame,
info->saved_regs[D10V_SP_REGNUM],
register_size (gdbarch, D10V_SP_REGNUM));
prev_sp = this_base;
}
else
{
/* Assume that the FP is this frame's SP but with that pushed
@@ -766,20 +758,28 @@ d10v_frame_unwind_cache (struct frame_info *next_frame,
prev_sp = this_base + info->size;
}
/* Convert that SP/BASE into real addresses. */
info->prev_sp = d10v_make_daddr (prev_sp);
info->base = d10v_make_daddr (this_base);
info->prev_sp = d10v_make_daddr (prev_sp);
/* Adjust all the saved registers so that they contain addresses and
not offsets. */
for (i = 0; i < NUM_REGS - 1; i++)
if (info->saved_regs[i])
if (info->saved_regs[i].addr)
{
info->saved_regs[i] = (info->prev_sp + info->saved_regs[i]);
info->saved_regs[i].addr = (info->prev_sp + info->saved_regs[i].addr);
}
/* The D10V_SP_REGNUM is special. Instead of the address of the SP, the
previous frame's SP value is saved. */
info->saved_regs[D10V_SP_REGNUM] = info->prev_sp;
/* The call instruction moves the caller's PC in the callee's LR.
Since this is an unwind, do the reverse. Copy the location of LR
into PC (the address / regnum) so that a request for PC will be
converted into a request for the LR. */
info->saved_regs[D10V_PC_REGNUM] = info->saved_regs[LR_REGNUM];
/* The previous frame's SP needed to be computed. Save the computed
value. */
trad_frame_register_value (info->saved_regs, D10V_SP_REGNUM,
d10v_make_daddr (prev_sp));
return info;
}
@@ -1429,55 +1429,6 @@ d10v_frame_this_id (struct frame_info *next_frame,
(*this_id) = id;
}
static void
saved_regs_unwinder (struct frame_info *next_frame,
CORE_ADDR *this_saved_regs,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
int *realnump, void *bufferp)
{
struct gdbarch *gdbarch = get_frame_arch (next_frame);
if (this_saved_regs[regnum] != 0)
{
if (regnum == D10V_SP_REGNUM)
{
/* SP register treated specially. */
*optimizedp = 0;
*lvalp = not_lval;
*addrp = 0;
*realnump = -1;
if (bufferp != NULL)
store_unsigned_integer (bufferp,
register_size (gdbarch, regnum),
this_saved_regs[regnum]);
}
else
{
/* Any other register is saved in memory, fetch it but cache
a local copy of its value. */
*optimizedp = 0;
*lvalp = lval_memory;
*addrp = this_saved_regs[regnum];
*realnump = -1;
if (bufferp != NULL)
{
/* Read the value in from memory. */
get_frame_memory (next_frame, this_saved_regs[regnum], bufferp,
register_size (gdbarch, regnum));
}
}
return;
}
/* No luck, assume this and the next frame have the same register
value. If a value is needed, pass the request on down the chain;
otherwise just return an indication that the value is in the same
register as the next frame. */
frame_register_unwind (next_frame, regnum, optimizedp, lvalp, addrp,
realnump, bufferp);
}
static void
d10v_frame_prev_register (struct frame_info *next_frame,
void **this_prologue_cache,
@@ -1487,19 +1438,8 @@ d10v_frame_prev_register (struct frame_info *next_frame,
{
struct d10v_unwind_cache *info
= d10v_frame_unwind_cache (next_frame, this_prologue_cache);
if (regnum == D10V_PC_REGNUM)
{
/* The call instruction saves the caller's PC in LR. The
function prologue of the callee may then save the LR on the
stack. Find that possibly saved LR value and return it. */
saved_regs_unwinder (next_frame, info->saved_regs, LR_REGNUM, optimizedp,
lvalp, addrp, realnump, bufferp);
}
else
{
saved_regs_unwinder (next_frame, info->saved_regs, regnum, optimizedp,
lvalp, addrp, realnump, bufferp);
}
trad_frame_prev_register (next_frame, info->saved_regs, regnum,
optimizedp, lvalp, addrp, realnump, bufferp);
}
static const struct frame_unwind d10v_frame_unwind = {