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dwarf2out.c (expand_builtin_init_dwarf_reg_sizes): If DWARF_FRAME_RETURN_COLUMN doesn't have a register mode, use Pmode.

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2003-07-15  J"orn Rennecke <joern.rennecke@superh.com>

	* dwarf2out.c (expand_builtin_init_dwarf_reg_sizes):
	If DWARF_FRAME_RETURN_COLUMN doesn't have a register mode, use Pmode.

2003-07-15  J"orn Rennecke <joern.rennecke@superh.com>
	    Richard Henderson  <rth@redhat.com>

	* unwind-dw2.c (_Unwind_GetGR): Use dwarf_reg_size_table
	to decide if to access a _Unwind_Ptr or a _Unwind_Word.
	(_Unwind_SetGR): Likewise.
	(_Unwind_GetPtr, _Unwind_SetSpColumn): New functions.
	(Unwind_SpTmp): New typedef.
	(uw_update_context_1): Use _Unwind_SetSpColumn and _Unwind_GetPtr.
	(uw_update_context): Use _Unwind_GetPtr.
	(init_dwarf_reg_size_table): Move above uw_init_context_1.
	(uw_init_context_1): Initialize dwarf_reg_size_table if necessary.
	Use _Unwind_SetSpColumn.
	(uw_install_context_1): Don't initialize dwarf_reg_size_table.
	Use _Unwind_GetPtr.

Co-Authored-By: Richard Henderson <rth@redhat.com>

From-SVN: r69424
This commit is contained in:
J"orn Rennecke 2003-07-15 22:49:07 +00:00 committed by Joern Rennecke
parent 5a170a05da
commit 71628aa098
3 changed files with 108 additions and 32 deletions
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21
gcc/ChangeLog
View File

@ -1,3 +1,24 @@
2003-07-15 J"orn Rennecke <joern.rennecke@superh.com>
* dwarf2out.c (expand_builtin_init_dwarf_reg_sizes):
If DWARF_FRAME_RETURN_COLUMN doesn't have a register mode, use Pmode.
2003-07-15 J"orn Rennecke <joern.rennecke@superh.com>
Richard Henderson <rth@redhat.com>
* unwind-dw2.c (_Unwind_GetGR): Use dwarf_reg_size_table
to decide if to access a _Unwind_Ptr or a _Unwind_Word.
(_Unwind_SetGR): Likewise.
(_Unwind_GetPtr, _Unwind_SetSpColumn): New functions.
(Unwind_SpTmp): New typedef.
(uw_update_context_1): Use _Unwind_SetSpColumn and _Unwind_GetPtr.
(uw_update_context): Use _Unwind_GetPtr.
(init_dwarf_reg_size_table): Move above uw_init_context_1.
(uw_init_context_1): Initialize dwarf_reg_size_table if necessary.
Use _Unwind_SetSpColumn.
(uw_install_context_1): Don't initialize dwarf_reg_size_table.
Use _Unwind_GetPtr.
2003-07-15 Neil Booth <neil@daikokuya.co.uk>
* c.opt: Document more options.

14
gcc/dwarf2out.c
View File

@ -443,6 +443,7 @@ expand_builtin_init_dwarf_reg_sizes (tree address)
enum machine_mode mode = TYPE_MODE (char_type_node);
rtx addr = expand_expr (address, NULL_RTX, VOIDmode, 0);
rtx mem = gen_rtx_MEM (BLKmode, addr);
bool wrote_return_column = false;
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (DWARF_FRAME_REGNUM (i) < DWARF_FRAME_REGISTERS)
@ -453,12 +454,25 @@ expand_builtin_init_dwarf_reg_sizes (tree address)
if (HARD_REGNO_CALL_PART_CLOBBERED (i, save_mode))
save_mode = choose_hard_reg_mode (i, 1, true);
if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN)
{
if (save_mode == VOIDmode)
continue;
wrote_return_column = true;
}
size = GET_MODE_SIZE (save_mode);
if (offset < 0)
continue;
emit_move_insn (adjust_address (mem, mode, offset), GEN_INT (size));
}
if (! wrote_return_column)
{
enum machine_mode save_mode = Pmode;
HOST_WIDE_INT offset = DWARF_FRAME_RETURN_COLUMN * GET_MODE_SIZE (mode);
HOST_WIDE_INT size = GET_MODE_SIZE (save_mode);
emit_move_insn (adjust_address (mem, mode, offset), GEN_INT (size));
}
}
/* Convert a DWARF call frame info. operation to its string name */

105
gcc/unwind-dw2.c
View File

@ -168,9 +168,27 @@ read_8s (const void *p) { const union unaligned *up = p; return up->s8; }
inline _Unwind_Word
_Unwind_GetGR (struct _Unwind_Context *context, int index)
{
int size;
void *ptr;
index = DWARF_REG_TO_UNWIND_COLUMN (index);
size = dwarf_reg_size_table[index];
ptr = context->reg[index];
/* This will segfault if the register hasn't been saved. */
return * (_Unwind_Word *) context->reg[index];
if (size == sizeof(_Unwind_Ptr))
return * (_Unwind_Ptr *) ptr;
if (size == sizeof(_Unwind_Word))
return * (_Unwind_Word *) ptr;
abort ();
}
static inline void *
_Unwind_GetPtr (struct _Unwind_Context *context, int index)
{
return (void *)(_Unwind_Ptr) _Unwind_GetGR (context, index);
}
/* Get the value of the CFA as saved in CONTEXT. */
@ -186,8 +204,19 @@ _Unwind_GetCFA (struct _Unwind_Context *context)
inline void
_Unwind_SetGR (struct _Unwind_Context *context, int index, _Unwind_Word val)
{
int size;
void *ptr;
index = DWARF_REG_TO_UNWIND_COLUMN (index);
* (_Unwind_Word *) context->reg[index] = val;
size = dwarf_reg_size_table[index];
ptr = context->reg[index];
if (size == sizeof(_Unwind_Ptr))
* (_Unwind_Ptr *) ptr = val;
else if (size == sizeof(_Unwind_Word))
* (_Unwind_Word *) ptr = val;
else
abort ();
}
/* Get the pointer to a register INDEX as saved in CONTEXT. */
@ -1072,6 +1101,23 @@ __frame_state_for (void *pc_target, struct frame_state *state_in)
return state_in;
}
typedef union { _Unwind_Ptr ptr; _Unwind_Word word; } _Unwind_SpTmp;
static inline void
_Unwind_SetSpColumn (struct _Unwind_Context *context, void *cfa,
_Unwind_SpTmp *tmp_sp)
{
int size = dwarf_reg_size_table[__builtin_dwarf_sp_column ()];
if (size == sizeof(_Unwind_Ptr))
tmp_sp->ptr = (_Unwind_Ptr) cfa;
else if (size == sizeof(_Unwind_Word))
tmp_sp->word = (_Unwind_Ptr) cfa;
else
abort ();
_Unwind_SetGRPtr (context, __builtin_dwarf_sp_column (), tmp_sp);
}
static void
uw_update_context_1 (struct _Unwind_Context *context, _Unwind_FrameState *fs)
{
@ -1095,13 +1141,10 @@ uw_update_context_1 (struct _Unwind_Context *context, _Unwind_FrameState *fs)
Always zap the saved stack pointer value for the next frame; carrying
the value over from one frame to another doesn't make sense. */
_Unwind_Word tmp_sp;
_Unwind_SpTmp tmp_sp;
if (!_Unwind_GetGRPtr (&orig_context, __builtin_dwarf_sp_column ()))
{
tmp_sp = (_Unwind_Ptr) context->cfa;
_Unwind_SetGRPtr (&orig_context, __builtin_dwarf_sp_column (), &tmp_sp);
}
_Unwind_SetSpColumn (&orig_context, context->cfa, &tmp_sp);
_Unwind_SetGRPtr (context, __builtin_dwarf_sp_column (), NULL);
#endif
@ -1109,7 +1152,7 @@ uw_update_context_1 (struct _Unwind_Context *context, _Unwind_FrameState *fs)
switch (fs->cfa_how)
{
case CFA_REG_OFFSET:
cfa = (void *) (_Unwind_Ptr) _Unwind_GetGR (&orig_context, fs->cfa_reg);
cfa = _Unwind_GetPtr (&orig_context, fs->cfa_reg);
cfa += fs->cfa_offset;
break;
@ -1175,7 +1218,7 @@ uw_update_context (struct _Unwind_Context *context, _Unwind_FrameState *fs)
/* Compute the return address now, since the return address column
can change from frame to frame. */
context->ra = __builtin_extract_return_addr
((void *) (_Unwind_Ptr) _Unwind_GetGR (context, fs->retaddr_column));
(_Unwind_GetPtr (context, fs->retaddr_column));
}
/* Fill in CONTEXT for top-of-stack. The only valid registers at this
@ -1192,13 +1235,19 @@ uw_update_context (struct _Unwind_Context *context, _Unwind_FrameState *fs)
} \
while (0)
static inline void
init_dwarf_reg_size_table (void)
{
__builtin_init_dwarf_reg_size_table (dwarf_reg_size_table);
}
static void
uw_init_context_1 (struct _Unwind_Context *context,
void *outer_cfa, void *outer_ra)
{
void *ra = __builtin_extract_return_addr (__builtin_return_address (0));
_Unwind_FrameState fs;
_Unwind_Word sp_slot;
_Unwind_SpTmp sp_slot;
memset (context, 0, sizeof (struct _Unwind_Context));
context->ra = ra;
@ -1206,9 +1255,20 @@ uw_init_context_1 (struct _Unwind_Context *context,
if (uw_frame_state_for (context, &fs) != _URC_NO_REASON)
abort ();
#if __GTHREADS
{
static __gthread_once_t once_regsizes = __GTHREAD_ONCE_INIT;
if (__gthread_once (&once_regsizes, init_dwarf_reg_size_table) != 0
|| dwarf_reg_size_table[0] == 0)
init_dwarf_reg_size_table ();
}
#else
if (dwarf_reg_size_table[0] == 0)
init_dwarf_reg_size_table ();
#endif
/* Force the frame state to use the known cfa value. */
sp_slot = (_Unwind_Ptr) outer_cfa;
_Unwind_SetGRPtr (context, __builtin_dwarf_sp_column (), &sp_slot);
_Unwind_SetSpColumn (context, outer_cfa, &sp_slot);
fs.cfa_how = CFA_REG_OFFSET;
fs.cfa_reg = __builtin_dwarf_sp_column ();
fs.cfa_offset = 0;
@ -1235,30 +1295,12 @@ uw_init_context_1 (struct _Unwind_Context *context,
} \
while (0)
static inline void
init_dwarf_reg_size_table (void)
{
__builtin_init_dwarf_reg_size_table (dwarf_reg_size_table);
}
static long
uw_install_context_1 (struct _Unwind_Context *current,
struct _Unwind_Context *target)
{
long i;
#if __GTHREADS
{
static __gthread_once_t once_regsizes = __GTHREAD_ONCE_INIT;
if (__gthread_once (&once_regsizes, init_dwarf_reg_size_table) != 0
|| dwarf_reg_size_table[0] == 0)
init_dwarf_reg_size_table ();
}
#else
if (dwarf_reg_size_table[0] == 0)
init_dwarf_reg_size_table ();
#endif
for (i = 0; i < DWARF_FRAME_REGISTERS; ++i)
{
void *c = current->reg[i];
@ -1274,8 +1316,7 @@ uw_install_context_1 (struct _Unwind_Context *current,
/* If the last frame records a saved stack pointer, use it. */
if (_Unwind_GetGRPtr (target, __builtin_dwarf_sp_column ()))
target_cfa = (void *)(_Unwind_Ptr)
_Unwind_GetGR (target, __builtin_dwarf_sp_column ());
target_cfa = _Unwind_GetPtr (target, __builtin_dwarf_sp_column ());
else
target_cfa = target->cfa;