mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-27 12:15:39 +03:00
133 lines
3.7 KiB
Plaintext
133 lines
3.7 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
|
|
# Local configure fragment for sysdeps/x86.
|
|
|
|
if test $enable_cet != no; then
|
|
# Check if CET can be enabled.
|
|
AC_CACHE_CHECK(whether CET can be enabled,
|
|
libc_cv_x86_cet_available, [dnl
|
|
cat > conftest.c <<EOF
|
|
#if !defined __CET__ || __CET__ != 3
|
|
# error CET isn't available.
|
|
#endif
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS -fcf-protection -include cet.h conftest.c 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_x86_cet_available=yes
|
|
else
|
|
libc_cv_x86_cet_available=no
|
|
fi
|
|
rm -rf conftest*])
|
|
if test $libc_cv_x86_cet_available != yes; then
|
|
AC_MSG_ERROR([$CC doesn't support CET])
|
|
fi
|
|
fi
|
|
if test $enable_cet != no; then
|
|
# Check if assembler supports CET.
|
|
AC_CACHE_CHECK(whether assembler supports CET,
|
|
libc_cv_x86_cet_as, [dnl
|
|
cat > conftest.s <<EOF
|
|
incsspd %ecx
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s -o conftest.o 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_x86_cet_as=yes
|
|
else
|
|
libc_cv_x86_cet_as=no
|
|
fi
|
|
rm -rf conftest*])
|
|
if test $libc_cv_x86_cet_as = no; then
|
|
AC_MSG_ERROR([$AS doesn't support CET])
|
|
fi
|
|
fi
|
|
if test $enable_cet = yes; then
|
|
AC_DEFINE(DEFAULT_DL_X86_CET_CONTROL, cet_elf_property)
|
|
elif test $enable_cet = permissive; then
|
|
AC_DEFINE(DEFAULT_DL_X86_CET_CONTROL, cet_permissive)
|
|
fi
|
|
LIBC_CONFIG_VAR([enable-cet], [$enable_cet])
|
|
|
|
# Check if linker supports x86 ISA level.
|
|
AC_CACHE_CHECK([for linker x86 ISA level support],
|
|
libc_cv_include_x86_isa_level, [dnl
|
|
cat > conftest1.S <<EOF
|
|
#ifdef __LP64__
|
|
# define P2ALIGN 3
|
|
#else
|
|
# define P2ALIGN 2
|
|
#endif
|
|
.section ".note.gnu.property", "a"
|
|
.p2align P2ALIGN
|
|
.long 1f - 0f /* name length. */
|
|
.long 4f - 1f /* data length. */
|
|
/* NT_GNU_PROPERTY_TYPE_0 */
|
|
.long 5 /* note type. */
|
|
0:
|
|
.asciz "GNU" /* vendor name. */
|
|
1:
|
|
.p2align P2ALIGN
|
|
/* GNU_PROPERTY_X86_ISA_1_NEEDED */
|
|
.long 0xc0008002 /* pr_type. */
|
|
.long 3f - 2f /* pr_datasz. */
|
|
2:
|
|
.long 0x1
|
|
3:
|
|
.p2align P2ALIGN
|
|
4:
|
|
EOF
|
|
cat > conftest2.S <<EOF
|
|
#ifdef __LP64__
|
|
# define P2ALIGN 3
|
|
#else
|
|
# define P2ALIGN 2
|
|
#endif
|
|
.section ".note.gnu.property", "a"
|
|
.p2align P2ALIGN
|
|
.long 1f - 0f /* name length. */
|
|
.long 4f - 1f /* data length. */
|
|
/* NT_GNU_PROPERTY_TYPE_0 */
|
|
.long 5 /* note type. */
|
|
0:
|
|
.asciz "GNU" /* vendor name. */
|
|
1:
|
|
.p2align P2ALIGN
|
|
/* GNU_PROPERTY_X86_ISA_1_NEEDED */
|
|
.long 0xc0008002 /* pr_type. */
|
|
.long 3f - 2f /* pr_datasz. */
|
|
2:
|
|
.long 0x2
|
|
3:
|
|
.p2align P2ALIGN
|
|
4:
|
|
EOF
|
|
libc_cv_include_x86_isa_level=no
|
|
if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS -nostartfiles -nostdlib -r -o conftest conftest1.S conftest2.S); then
|
|
count=`LC_ALL=C $READELF -n conftest | grep NT_GNU_PROPERTY_TYPE_0 | wc -l`
|
|
if test "$count" = 1; then
|
|
libc_cv_include_x86_isa_level=yes
|
|
fi
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_include_x86_isa_level = yes; then
|
|
AC_DEFINE(INCLUDE_X86_ISA_LEVEL)
|
|
AC_CACHE_CHECK([for LAHF/SAHF instruction support],
|
|
libc_cv_have_x86_lahf_sahf, [dnl
|
|
libc_cv_have_x86_lahf_sahf=no
|
|
if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS -fverbose-asm -S -o - -x c /dev/null) | grep -qE '(-msahf\b|-march=x86-64-v)'; then
|
|
libc_cv_have_x86_lahf_sahf=yes
|
|
fi])
|
|
if test $libc_cv_have_x86_lahf_sahf = yes; then
|
|
AC_DEFINE(HAVE_X86_LAHF_SAHF)
|
|
fi
|
|
AC_CACHE_CHECK([for MOVBE instruction support],
|
|
libc_cv_have_x86_movbe, [dnl
|
|
libc_cv_have_x86_movbe=no
|
|
if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS -fverbose-asm -S -o - -x c /dev/null) | grep -qE '(-mmovbe\b|-march=x86-64-v(@<:@3-9@:>@|@<:@1-9@:>@@<:@0-9@:>@))'; then
|
|
libc_cv_have_x86_movbe=yes
|
|
fi])
|
|
if test $libc_cv_have_x86_movbe = yes; then
|
|
AC_DEFINE(HAVE_X86_MOVBE)
|
|
fi
|
|
fi
|
|
LIBC_CONFIG_VAR([enable-x86-isa-level], [$libc_cv_include_x86_isa_level])
|
|
|
|
dnl Static PIE is supported.
|
|
AC_DEFINE(SUPPORT_STATIC_PIE)
|