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authorAndreas Jaeger <aj@suse.de>2003-05-21 09:25:53 +0000
committerAndreas Jaeger <aj@suse.de>2003-05-21 09:25:53 +0000
commit5018956927ff82b308a8885dcc23dfcddb3ad177 (patch)
treeac1c69dbe5bec98193689e64c4ab9a5fb5ccdfea
parent479aa8ecb2e64cb2bd70be3c258d42541d916291 (diff)
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* 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. 2003-05-21 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.
-rw-r--r--ChangeLog14
-rw-r--r--config.h.in3
-rwxr-xr-xconfigure33
-rw-r--r--configure.in18
-rw-r--r--sysdeps/generic/sysdep.h21
-rw-r--r--sysdeps/x86_64/sysdep.h14
6 files changed, 100 insertions, 3 deletions
diff --git a/ChangeLog b/ChangeLog
index 29791a6..f5e6076 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -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
diff --git a/configure b/configure
index eac55c6..1dfeaa2 100755
--- a/configure
+++ b/configure
@@ -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