diff options
| -rw-r--r-- | ChangeLog | 14 | ||||
| -rw-r--r-- | config.h.in | 3 | ||||
| -rwxr-xr-x | configure | 33 | ||||
| -rw-r--r-- | configure.in | 18 | ||||
| -rw-r--r-- | sysdeps/generic/sysdep.h | 21 | ||||
| -rw-r--r-- | sysdeps/x86_64/sysdep.h | 14 |
6 files changed, 100 insertions, 3 deletions
@@ -1,3 +1,17 @@ +2003-05-21 Andreas Jaeger <aj@suse.de> + + * sysdeps/generic/sysdep.h (cfi_offset, cfi_startproc, + cfi_endproc, cfi_def_cfa, cfi_def_ccfa_register, + cfi_def_cfa_offset, cfi_adjust_cfa_offset, cfi_offset): Define. + + * sysdeps/x86_64/sysdep.h (CALL_MCOUNT): Add cfi directives. + (ENTRY): Likewise. + (END): Likewise. + + * configure.in: Test for asm cfi directives. + + * config.h.in: Add HAVE_ASM_CFI_DIRECTIVES. + 2003-05-17 Andreas Jaeger <aj@suse.de> * sysdeps/unix/sysv/linux/x86_64/syscall.S: Revert last patch. diff --git a/config.h.in b/config.h.in index cd132ce..ba5a55c 100644 --- a/config.h.in +++ b/config.h.in @@ -31,6 +31,9 @@ /* Define if weak symbols are available via the `.weakext' directive. */ #undef HAVE_ASM_WEAKEXT_DIRECTIVE +/* Define if CFI directives are available. */ +#undef HAVE_ASM_CFI_DIRECTIVES + /* Define to the assembler line separator character for multiple assembler instructions per line. Default is `;' */ #undef ASM_LINE_SEP @@ -5689,6 +5689,39 @@ _ACEOF ;; esac +echo "$as_me:$LINENO: checking whether CFI directives are supported" >&5 +echo $ECHO_N "checking whether CFI directives are supported... $ECHO_C" >&6 +if test "${libc_cv_asm_cfi_directives+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat > conftest.s <<EOF + .text + .type func,@function +func: + .cfi_startproc + .cfi_endproc +EOF +if { ac_try='${CC-cc} $ASFLAGS -c conftest.s 1>&5' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + libc_cv_asm_cfi_directives=yes +else + libc_cv_asm_cfi_directives=no +fi +rm -f conftest* +fi +echo "$as_me:$LINENO: result: $libc_cv_asm_cfi_directives" >&5 +echo "${ECHO_T}$libc_cv_asm_cfi_directives" >&6 +if test $libc_cv_asm_cfi_directives = yes; then + cat >>confdefs.h <<\_ACEOF +#define HAVE_ASM_CFI_DIRECTIVES 1 +_ACEOF + +fi + echo "$as_me:$LINENO: checking if -g produces usable source locations for assembler-with-cpp" >&5 echo $ECHO_N "checking if -g produces usable source locations for assembler-with-cpp... $ECHO_C" >&6 if test "${libc_cv_cpp_asm_debuginfo+set}" = set; then diff --git a/configure.in b/configure.in index f0511ac..c415f37 100644 --- a/configure.in +++ b/configure.in @@ -1502,6 +1502,24 @@ EOF ;; esac +AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl +cat > conftest.s <<EOF + .text + .type func,@function +func: + .cfi_startproc + .cfi_endproc +EOF +if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then + libc_cv_asm_cfi_directives=yes +else + libc_cv_asm_cfi_directives=no +fi +rm -f conftest*]) +if test $libc_cv_asm_cfi_directives = yes; then + AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES) +fi + AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp, libc_cv_cpp_asm_debuginfo, [dnl cat > conftest.S <<EOF diff --git a/sysdeps/generic/sysdep.h b/sysdeps/generic/sysdep.h index 0d69ac6..3223c97 100644 --- a/sysdeps/generic/sysdep.h +++ b/sysdeps/generic/sysdep.h @@ -46,4 +46,25 @@ #ifndef JUMPTARGET #define JUMPTARGET(sym) sym #endif + +/* Makros to generate eh_frame unwind information. */ +# ifdef HAVE_ASM_CFI_DIRECTIVES +# define cfi_startproc .cfi_startproc +# define cfi_endproc .cfi_endproc +# define cfi_def_cfa(reg, off) .cfi_def_cfa reg, off +# define cfi_def_cfa_register(reg) .cfi_def_cfa_register reg +# define cfi_def_cfa_offset(off) .cfi_def_cfa_offset off +# define cfi_adjust_cfa_offset(off) .cfi_adjust_cfa_offset off +# define cfi_offset(reg, off) .cfi_offset reg, off +# else +# define cfi_startproc +# define cfi_endproc +# define cfi_def_cfa(reg, off) +# define cfi_def_cfa_register(reg) +# define cfi_def_cfa_offset(off) +# define cfi_adjust_cfa_offset(off) +# define cfi_offset(reg, off) +# endif + + #endif /* __ASSEMBLER__ */ diff --git a/sysdeps/x86_64/sysdep.h b/sysdeps/x86_64/sysdep.h index 99b7e56..122270f 100644 --- a/sysdeps/x86_64/sysdep.h +++ b/sysdeps/x86_64/sysdep.h @@ -50,18 +50,26 @@ ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \ .align ALIGNARG(4); \ C_LABEL(name) \ + cfi_startproc; \ CALL_MCOUNT #undef END #define END(name) \ - ASM_SIZE_DIRECTIVE(name) \ + cfi_endproc; \ + ASM_SIZE_DIRECTIVE(name) /* If compiled for profiling, call `mcount' at the start of each function. */ #ifdef PROF /* The mcount code relies on a normal frame pointer being on the stack to locate our caller, so push one just for its benefit. */ -#define CALL_MCOUNT \ - pushq %rbp; movq %rsp, %rbp; call JUMPTARGET(mcount); popq %rbp; +#define CALL_MCOUNT \ + pushq %rbp; \ + cfi_adjust_cfa_offset(8); \ + movq %rsp, %rbp; \ + cfi_def_cfa_register(%rbp); \ + call JUMPTARGET(mcount); \ + popq %rbp; \ + cfi_def_cfa(rsp,8); #else #define CALL_MCOUNT /* Do nothing. */ #endif |