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Bug 778414: ensure the linker supports @unwind sections in libffi. r=glandium
This fixes clang builds on OpenBSD/amd64, since clang itself supports @unwind sections but OpenBSD's ld 2.15 doesn't. Previously the test yielded true, thus producing a broken libffi.
This commit is contained in:
Landry Breuil
parent
d121441887
commit
6c017dca38
28
js/src/ctypes/libffi/configure
vendored
28
js/src/ctypes/libffi/configure
vendored
@ -12427,16 +12427,32 @@ $as_echo "#define FFI_MMAP_EXEC_WRIT 1" >>confdefs.h
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esac
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if test x$TARGET = xX86_64; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler supports unwind section type" >&5
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$as_echo_n "checking assembler supports unwind section type... " >&6; }
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking toolchain supports unwind section type" >&5
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$as_echo_n "checking toolchain supports unwind section type... " >&6; }
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if test "${libffi_cv_as_x86_64_unwind_section_type+set}" = set; then :
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$as_echo_n "(cached) " >&6
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else
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libffi_cv_as_x86_64_unwind_section_type=yes
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echo '.section .eh_frame,"a",@unwind' > conftest.s
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if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
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libffi_cv_as_x86_64_unwind_section_type=no
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cat > conftest1.s << EOF
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.text
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.globl foo
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foo:
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jmp bar
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.section .eh_frame,"a",@unwind
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bar:
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EOF
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cat > conftest2.c << EOF
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extern void foo();
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int main(){foo();}
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EOF
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libffi_cv_as_x86_64_unwind_section_type=no
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# we ensure that we can compile _and_ link an assembly file containing an @unwind section
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# since the compiler can support it and not the linker (ie old binutils)
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if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
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$CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
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libffi_cv_as_x86_64_unwind_section_type=yes
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fi
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fi
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@ -332,12 +332,28 @@ case "$target" in
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esac
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if test x$TARGET = xX86_64; then
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AC_CACHE_CHECK([assembler supports unwind section type],
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AC_CACHE_CHECK([toolchain supports unwind section type],
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libffi_cv_as_x86_64_unwind_section_type, [
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libffi_cv_as_x86_64_unwind_section_type=yes
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echo '.section .eh_frame,"a",@unwind' > conftest.s
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if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
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libffi_cv_as_x86_64_unwind_section_type=no
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cat > conftest1.s << EOF
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.text
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.globl foo
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foo:
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jmp bar
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.section .eh_frame,"a",@unwind
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bar:
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EOF
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cat > conftest2.c << EOF
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extern void foo();
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int main(){foo();}
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EOF
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libffi_cv_as_x86_64_unwind_section_type=no
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# we ensure that we can compile _and_ link an assembly file containing an @unwind section
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# since the compiler can support it and not the linker (ie old binutils)
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if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
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$CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
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libffi_cv_as_x86_64_unwind_section_type=yes
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fi
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])
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if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
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99
js/src/ctypes/patches-libffi/06-bug-778414.patch
Normal file
99
js/src/ctypes/patches-libffi/06-bug-778414.patch
Normal file
@ -0,0 +1,99 @@
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diff --git a/js/src/ctypes/libffi/configure b/js/src/ctypes/libffi/configure
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--- a/js/src/ctypes/libffi/configure
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+++ b/js/src/ctypes/libffi/configure
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@@ -12422,26 +12422,42 @@ case "$target" in
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*-apple-darwin1* | *-*-freebsd* | *-*-openbsd* | *-pc-solaris*)
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$as_echo "#define FFI_MMAP_EXEC_WRIT 1" >>confdefs.h
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;;
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esac
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if test x$TARGET = xX86_64; then
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- { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler supports unwind section type" >&5
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-$as_echo_n "checking assembler supports unwind section type... " >&6; }
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+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking toolchain supports unwind section type" >&5
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+$as_echo_n "checking toolchain supports unwind section type... " >&6; }
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if test "${libffi_cv_as_x86_64_unwind_section_type+set}" = set; then :
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$as_echo_n "(cached) " >&6
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else
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- libffi_cv_as_x86_64_unwind_section_type=yes
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- echo '.section .eh_frame,"a",@unwind' > conftest.s
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- if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
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- libffi_cv_as_x86_64_unwind_section_type=no
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+ cat > conftest1.s << EOF
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+.text
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+.globl foo
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+foo:
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+jmp bar
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+.section .eh_frame,"a",@unwind
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+bar:
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+EOF
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+
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+ cat > conftest2.c << EOF
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+extern void foo();
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+int main(){foo();}
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+EOF
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+
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+ libffi_cv_as_x86_64_unwind_section_type=no
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+ # we ensure that we can compile _and_ link an assembly file containing an @unwind section
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+ # since the compiler can support it and not the linker (ie old binutils)
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+ if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
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+ $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
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+ libffi_cv_as_x86_64_unwind_section_type=yes
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libffi_cv_as_x86_64_unwind_section_type" >&5
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$as_echo "$libffi_cv_as_x86_64_unwind_section_type" >&6; }
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if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
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$as_echo "#define HAVE_AS_X86_64_UNWIND_SECTION_TYPE 1" >>confdefs.h
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diff --git a/js/src/ctypes/libffi/configure.ac b/js/src/ctypes/libffi/configure.ac
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--- a/js/src/ctypes/libffi/configure.ac
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+++ b/js/src/ctypes/libffi/configure.ac
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@@ -327,22 +327,38 @@ case "$target" in
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*-apple-darwin1* | *-*-freebsd* | *-*-openbsd* | *-pc-solaris*)
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AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
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[Cannot use malloc on this target, so, we revert to
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alternative means])
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;;
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esac
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if test x$TARGET = xX86_64; then
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- AC_CACHE_CHECK([assembler supports unwind section type],
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+ AC_CACHE_CHECK([toolchain supports unwind section type],
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libffi_cv_as_x86_64_unwind_section_type, [
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- libffi_cv_as_x86_64_unwind_section_type=yes
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- echo '.section .eh_frame,"a",@unwind' > conftest.s
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- if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
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- libffi_cv_as_x86_64_unwind_section_type=no
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+ cat > conftest1.s << EOF
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+.text
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+.globl foo
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+foo:
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+jmp bar
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+.section .eh_frame,"a",@unwind
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+bar:
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+EOF
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+
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+ cat > conftest2.c << EOF
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+extern void foo();
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+int main(){foo();}
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+EOF
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+
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+ libffi_cv_as_x86_64_unwind_section_type=no
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+ # we ensure that we can compile _and_ link an assembly file containing an @unwind section
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+ # since the compiler can support it and not the linker (ie old binutils)
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+ if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
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+ $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
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+ libffi_cv_as_x86_64_unwind_section_type=yes
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fi
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])
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if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
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AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
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[Define if your assembler supports unwind section type.])
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fi
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fi
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