configure.ac (HAVE_GAS_CFI_PERSONALITY_DIRECTIVE): New.
* configure.ac (HAVE_GAS_CFI_PERSONALITY_DIRECTIVE): New.
* configure, config.in: Rebuild.
* debug.h (dwarf2out_do_cfi_asm): Declare.
* c-cppbuiltin.c (c_cpp_builtins): Use it.
* dwarf2out.c (dwarf2out_do_cfi_asm): New.
(dwarf2out_cfi_label, add_fde_cfi, output_call_frame_info,
dwarf2out_begin_prologue, dwarf2out_end_epilogue): Use it.
From-SVN: r138846
This commit is contained in:
Richard Henderson
Richard Henderson
parent
9940eebdf8
commit
058514b381
7 changed files with 102 additions and 9 deletions
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@ -1,3 +1,13 @@
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2008-08-07 Richard Henderson <rth@redhat.com>
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* configure.ac (HAVE_GAS_CFI_PERSONALITY_DIRECTIVE): New.
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* configure, config.in: Rebuild.
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* debug.h (dwarf2out_do_cfi_asm): Declare.
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* c-cppbuiltin.c (c_cpp_builtins): Use it.
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* dwarf2out.c (dwarf2out_do_cfi_asm): New.
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(dwarf2out_cfi_label, add_fde_cfi, output_call_frame_info,
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dwarf2out_begin_prologue, dwarf2out_end_epilogue): Use it.
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2008-08-07 Joseph Myers <joseph@codesourcery.com>
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* config/arm/iwmmxt.md (movv8qi_internal, movv4hi_internal,
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@ -693,7 +693,7 @@ c_cpp_builtins (cpp_reader *pfile)
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#endif
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#ifdef DWARF2_UNWIND_INFO
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if (flag_dwarf2_cfi_asm && dwarf2out_do_frame ())
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if (dwarf2out_do_cfi_asm ())
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cpp_define (pfile, "__GCC_HAVE_DWARF2_CFI_ASM");
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#endif
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@ -827,6 +827,12 @@
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#endif
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/* Define 0/1 if your assembler supports .cfi_personality. */
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#ifndef USED_FOR_TARGET
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#undef HAVE_GAS_CFI_PERSONALITY_DIRECTIVE
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#endif
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/* Define if your assembler uses the new HImode fild and fist notation. */
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#ifndef USED_FOR_TARGET
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#undef HAVE_GAS_FILDS_FISTS
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42
gcc/configure
vendored
42
gcc/configure
vendored
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@ -20851,7 +20851,6 @@ fi
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.cfi_same_value 1
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.cfi_def_cfa 1, 2
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.cfi_escape 1, 2, 3, 4, 5
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.cfi_personality 0, symbol
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.cfi_endproc' > conftest.s
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if { ac_try='$gcc_cv_as -o conftest.o conftest.s >&5'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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@ -20877,6 +20876,47 @@ cat >>confdefs.h <<_ACEOF
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_ACEOF
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echo "$as_me:$LINENO: checking assembler for cfi personality directive" >&5
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echo $ECHO_N "checking assembler for cfi personality directive... $ECHO_C" >&6
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if test "${gcc_cv_as_cfi_personality_directive+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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gcc_cv_as_cfi_personality_directive=no
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if test $in_tree_gas = yes; then
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if test $in_tree_gas_is_elf = yes \
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&& test $gcc_cv_gas_vers -ge `expr \( \( 2 \* 1000 \) + 17 \) \* 1000 + 0`
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then gcc_cv_as_cfi_personality_directive=yes
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fi
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elif test x$gcc_cv_as != x; then
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echo ' .text
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.cfi_startproc,
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.cfi_personality 0, symbol
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.cfi_endproc' > conftest.s
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if { ac_try='$gcc_cv_as -o conftest.o conftest.s >&5'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }
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then
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gcc_cv_as_cfi_personality_directive=yes
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else
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echo "configure: failed program was" >&5
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cat conftest.s >&5
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fi
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rm -f conftest.o conftest.s
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fi
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fi
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echo "$as_me:$LINENO: result: $gcc_cv_as_cfi_personality_directive" >&5
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echo "${ECHO_T}$gcc_cv_as_cfi_personality_directive" >&6
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cat >>confdefs.h <<_ACEOF
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#define HAVE_GAS_CFI_PERSONALITY_DIRECTIVE `if test $gcc_cv_as_cfi_personality_directive = yes;
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then echo 1; else echo 0; fi`
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_ACEOF
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# GAS versions up to and including 2.11.0 may mis-optimize
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# .eh_frame data.
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echo "$as_me:$LINENO: checking assembler for eh_frame optimization" >&5
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@ -2189,11 +2189,21 @@ gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
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.cfi_same_value 1
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.cfi_def_cfa 1, 2
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.cfi_escape 1, 2, 3, 4, 5
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.cfi_personality 0, symbol
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.cfi_endproc])
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AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
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[`if test $gcc_cv_as_cfi_directive = yes; then echo 1; else echo 0; fi`],
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[Define 0/1 if your assembler supports CFI directives.])
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[Define 0/1 if your assembler supports CFI directives.])
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gcc_GAS_CHECK_FEATURE([cfi personality directive],
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gcc_cv_as_cfi_personality_directive, [elf,2,17,0],,
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[ .text
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.cfi_startproc,
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.cfi_personality 0, symbol
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.cfi_endproc])
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AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
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[`if test $gcc_cv_as_cfi_personality_directive = yes;
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then echo 1; else echo 0; fi`],
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[Define 0/1 if your assembler supports .cfi_personality.])
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# GAS versions up to and including 2.11.0 may mis-optimize
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# .eh_frame data.
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@ -160,6 +160,7 @@ extern void dwarf2out_frame_finish (void);
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/* Decide whether we want to emit frame unwind information for the current
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translation unit. */
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extern int dwarf2out_do_frame (void);
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extern int dwarf2out_do_cfi_asm (void);
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extern void dwarf2out_switch_text_section (void);
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extern void debug_flush_symbol_queue (void);
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@ -130,6 +130,32 @@ dwarf2out_do_frame (void)
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);
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}
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/* Decide whether to emit frame unwind via assembler directives. */
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int
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dwarf2out_do_cfi_asm (void)
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{
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int enc;
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if (!flag_dwarf2_cfi_asm || !dwarf2out_do_frame ())
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return false;
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if (!eh_personality_libfunc)
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return true;
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if (!HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
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return false;
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/* Make sure the personality encoding is one the assembler can support.
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In particular, aligned addresses can't be handled. */
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enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2,/*global=*/1);
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if ((enc & 0x70) != 0 && (enc & 0x70) != DW_EH_PE_pcrel)
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return false;
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enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0,/*global=*/0);
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if ((enc & 0x70) != 0 && (enc & 0x70) != DW_EH_PE_pcrel)
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return false;
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return true;
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}
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/* The size of the target's pointer type. */
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#ifndef PTR_SIZE
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#define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
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@ -667,7 +693,7 @@ dwarf2out_cfi_label (void)
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{
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static char label[20];
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if (flag_dwarf2_cfi_asm)
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if (dwarf2out_do_cfi_asm ())
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{
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/* In this case, we will be emitting the asm directive instead of
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the label, so just return a placeholder to keep the rest of the
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@ -691,7 +717,7 @@ add_fde_cfi (const char *label, dw_cfi_ref cfi)
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{
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dw_cfi_ref *list_head = &cie_cfi_head;
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if (flag_dwarf2_cfi_asm)
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if (dwarf2out_do_cfi_asm ())
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{
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if (label)
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{
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@ -2767,7 +2793,7 @@ output_call_frame_info (int for_eh)
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return;
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/* Nothing to do if the assembler's doing it all. */
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if (flag_dwarf2_cfi_asm)
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if (dwarf2out_do_cfi_asm ())
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return;
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/* If we make FDEs linkonce, we may have to emit an empty label for
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@ -3187,7 +3213,7 @@ dwarf2out_begin_prologue (unsigned int line ATTRIBUTE_UNUSED,
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dwarf2out_source_line (line, file);
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#endif
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if (flag_dwarf2_cfi_asm)
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if (dwarf2out_do_cfi_asm ())
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{
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int enc;
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rtx ref;
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@ -3242,7 +3268,7 @@ dwarf2out_end_epilogue (unsigned int line ATTRIBUTE_UNUSED,
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dw_fde_ref fde;
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char label[MAX_ARTIFICIAL_LABEL_BYTES];
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if (flag_dwarf2_cfi_asm)
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if (dwarf2out_do_cfi_asm ())
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fprintf (asm_out_file, "\t.cfi_endproc\n");
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/* Output a label to mark the endpoint of the code generated for this
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