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configure.ac (libffi_cv_as_x86_64_unwind_section_type): New test.

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* configure.ac (libffi_cv_as_x86_64_unwind_section_type): New test.
	* configure: Regenerate.
	* fficonfig.h.in: Regenerate.
	* libffi/src/x86/unix64.S (.eh_frame)
	[HAVE_AS_X86_64_UNWIND_SECTION_TYPE]: Use @unwind section type.

From-SVN: r157466
This commit is contained in:
Rainer Orth 2010-03-15 19:36:26 +00:00 • committed by Rainer Orth
parent 7dee65d88a
commit f4b130bb74
5 changed files with 53 additions and 0 deletions
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8
libffi/ChangeLog
View file

@ -1,3 +1,11 @@
2010-03-15 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* configure.ac (libffi_cv_as_x86_64_unwind_section_type): New test.
* configure: Regenerate.
* fficonfig.h.in: Regenerate.
* libffi/src/x86/unix64.S (.eh_frame)
[HAVE_AS_X86_64_UNWIND_SECTION_TYPE]: Use @unwind section type.
2010-02-24 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* doc/libffi.texi (The Closure API): Fix typo.

23
libffi/configure vendored
View file

@ -12419,6 +12419,29 @@ $as_echo "#define FFI_MMAP_EXEC_WRIT 1" >>confdefs.h
;;
esac
if test x$TARGET = xX86_64; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler supports unwind section type" >&5
$as_echo_n "checking assembler supports unwind section type... " >&6; }
if test "${libffi_cv_as_x86_64_unwind_section_type+set}" = set; then :
$as_echo_n "(cached) " >&6
else
libffi_cv_as_x86_64_unwind_section_type=yes
echo '.section .eh_frame,"a",@unwind' > conftest.s
if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
libffi_cv_as_x86_64_unwind_section_type=no
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libffi_cv_as_x86_64_unwind_section_type" >&5
$as_echo "$libffi_cv_as_x86_64_unwind_section_type" >&6; }
if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
$as_echo "#define HAVE_AS_X86_64_UNWIND_SECTION_TYPE 1" >>confdefs.h
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether .eh_frame section should be read-only" >&5
$as_echo_n "checking whether .eh_frame section should be read-only... " >&6; }
if test "${libffi_cv_ro_eh_frame+set}" = set; then :

15
libffi/configure.ac
View file

@ -284,6 +284,21 @@ case "$target" in
;;
esac
if test x$TARGET = xX86_64; then
AC_CACHE_CHECK([assembler supports unwind section type],
libffi_cv_as_x86_64_unwind_section_type, [
libffi_cv_as_x86_64_unwind_section_type=yes
echo '.section .eh_frame,"a",@unwind' > conftest.s
if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
libffi_cv_as_x86_64_unwind_section_type=no
fi
])
if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
[Define if your assembler supports unwind section type.])
fi
fi
AC_CACHE_CHECK([whether .eh_frame section should be read-only],
libffi_cv_ro_eh_frame, [
libffi_cv_ro_eh_frame=no

3
libffi/fficonfig.h.in
View file

@ -43,6 +43,9 @@
*/
#undef HAVE_AS_SPARC_UA_PCREL
/* Define if your assembler supports unwind section type. */
#undef HAVE_AS_X86_64_UNWIND_SECTION_TYPE
/* Define if your assembler supports PC relative relocs. */
#undef HAVE_AS_X86_PCREL

4
libffi/src/x86/unix64.S
View file

@ -324,7 +324,11 @@ ffi_closure_unix64:
.LUW9:
.size ffi_closure_unix64,.-ffi_closure_unix64
#ifdef HAVE_AS_X86_64_UNWIND_SECTION_TYPE
.section .eh_frame,"a",@unwind
#else
.section .eh_frame,"a",@progbits
#endif
.Lframe1:
.long .LECIE1-.LSCIE1 /* CIE Length */
.LSCIE1: