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sysv4.h (DWARF2_FRAME_REG_OUT): Define.

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* config/rs6000/sysv4.h (DWARF2_FRAME_REG_OUT): Define.
	* dwarf2out.c (output_cfi): Map regs using DWARF2_FRAME_REG_OUT.
	* doc/tm.texi (DWARF_FRAME_REGNUM, DWARF2_FRAME_REG_OUT): Document.

From-SVN: r76235
This commit is contained in:
Alan Modra 2004-01-20 22:29:24 +00:00 committed by Alan Modra
parent a42952105e
commit 34c80057fc
4 changed files with 65 additions and 19 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2004-01-21 Alan Modra <amodra@bigpond.net.au>
* config/rs6000/sysv4.h (DWARF2_FRAME_REG_OUT): Define.
* dwarf2out.c (output_cfi): Map regs using DWARF2_FRAME_REG_OUT.
* doc/tm.texi (DWARF_FRAME_REGNUM, DWARF2_FRAME_REG_OUT): Document.
2004-01-20 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
* pa-protos.h (compute_frame_size): Use HOST_WIDE_INT for frame sizes.

12
gcc/config/rs6000/sysv4.h
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@ -744,6 +744,18 @@ extern int fixuplabelno;
#define DBX_REGISTER_NUMBER(REGNO) rs6000_dbx_register_number (REGNO)
/* Map register numbers held in the call frame info that gcc has
collected using DWARF_FRAME_REGNUM to those that should be output in
.debug_frame and .eh_frame. We continue to use gcc hard reg numbers
for .eh_frame, but use the numbers mandated by the various ABIs for
.debug_frame. rs6000_emit_prologue has translated any combination of
CR2, CR3, CR4 saves to a save of CR2. The actual code emitted saves
the whole of CR, so we map CR2_REGNO to the DWARF reg for CR. */
#define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) \
((FOR_EH) ? (REGNO) \
: (REGNO) == CR2_REGNO ? 64 \
: DBX_REGISTER_NUMBER (REGNO))
#define TARGET_ENCODE_SECTION_INFO rs6000_elf_encode_section_info
#define TARGET_IN_SMALL_DATA_P rs6000_elf_in_small_data_p
#define TARGET_SECTION_TYPE_FLAGS rs6000_elf_section_type_flags

20
gcc/doc/tm.texi
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@ -3289,6 +3289,26 @@ column number to use instead.
See the PowerPC's SPE target for an example.
@end defmac
@defmac DWARF_FRAME_REGNUM (@var{regno})
Define this macro if the target's representation for dwarf registers
used in .eh_frame or .debug_frame is different from that used in other
debug info sections. Given a gcc hard register number, this macro
should return the .eh_frame register number. The default is
@code{DBX_REGISTER_NUMBER (@var{regno})}.
@end defmac
@defmac DWARF2_FRAME_REG_OUT (@var{regno}, @var{for_eh})
Define this macro to map register numbers held in the call frame info
that gcc has collected using @code{DWARF_FRAME_REGNUM} to those that
should be output in .debug_frame (@code{@var{for_eh}} is zero) and
.eh_frame (@code{@var{for_eh}} is non-zero). The default is to
return @code{@var{regno}}.
@end defmac
@node Elimination
@subsection Eliminating Frame Pointer and Arg Pointer

46
gcc/dwarf2out.c
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@ -1790,11 +1790,19 @@ dw_cfi_oprnd2_desc (enum dwarf_call_frame_info cfi)
#if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
/* Map register numbers held in the call frame info that gcc has
collected using DWARF_FRAME_REGNUM to those that should be output in
.debug_frame and .eh_frame. */
#ifndef DWARF2_FRAME_REG_OUT
#define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
#endif
/* Output a Call Frame Information opcode and its operand(s). */
static void
output_cfi (dw_cfi_ref cfi, dw_fde_ref fde, int for_eh)
{
unsigned long r;
if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
dw2_asm_output_data (1, (cfi->dw_cfi_opc
| (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f)),
@ -1802,17 +1810,17 @@ output_cfi (dw_cfi_ref cfi, dw_fde_ref fde, int for_eh)
cfi->dw_cfi_oprnd1.dw_cfi_offset);
else if (cfi->dw_cfi_opc == DW_CFA_offset)
{
dw2_asm_output_data (1, (cfi->dw_cfi_opc
| (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f)),
"DW_CFA_offset, column 0x%lx",
cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh);
dw2_asm_output_data (1, (cfi->dw_cfi_opc | (r & 0x3f)),
"DW_CFA_offset, column 0x%lx", r);
dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL);
}
else if (cfi->dw_cfi_opc == DW_CFA_restore)
dw2_asm_output_data (1, (cfi->dw_cfi_opc
| (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f)),
"DW_CFA_restore, column 0x%lx",
cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
{
r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh);
dw2_asm_output_data (1, (cfi->dw_cfi_opc | (r & 0x3f)),
"DW_CFA_restore, column 0x%lx", r);
}
else
{
dw2_asm_output_data (1, cfi->dw_cfi_opc,
@ -1857,15 +1865,15 @@ output_cfi (dw_cfi_ref cfi, dw_fde_ref fde, int for_eh)
case DW_CFA_offset_extended:
case DW_CFA_def_cfa:
dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num,
NULL);
r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh);
dw2_asm_output_data_uleb128 (r, NULL);
dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL);
break;
case DW_CFA_offset_extended_sf:
case DW_CFA_def_cfa_sf:
dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num,
NULL);
r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh);
dw2_asm_output_data_uleb128 (r, NULL);
dw2_asm_output_data_sleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL);
break;
@ -1873,15 +1881,15 @@ output_cfi (dw_cfi_ref cfi, dw_fde_ref fde, int for_eh)
case DW_CFA_undefined:
case DW_CFA_same_value:
case DW_CFA_def_cfa_register:
dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num,
NULL);
r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh);
dw2_asm_output_data_uleb128 (r, NULL);
break;
case DW_CFA_register:
dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num,
NULL);
dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num,
NULL);
r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh);
dw2_asm_output_data_uleb128 (r, NULL);
r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd2.dw_cfi_reg_num, for_eh);
dw2_asm_output_data_uleb128 (r, NULL);
break;
case DW_CFA_def_cfa_offset:
@ -1911,7 +1919,7 @@ output_cfi (dw_cfi_ref cfi, dw_fde_ref fde, int for_eh)
}
}
/* Output the call frame information used to used to record information
/* Output the call frame information used to record information
that relates to calculating the frame pointer, and records the
location of saved registers. */