mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-20 08:30:00 +00:00
098a657fe4
PI_STATIC_AND_HIDDEN indicates whether accesses to internal linkage variables and hidden visibility variables in a shared object (ld.so) need dynamic relocations (usually R_*_RELATIVE). PI (position independent) in the macro name is a misnomer: a code sequence using GOT is typically position-independent as well, but using dynamic relocations does not meet the requirement. Not defining PI_STATIC_AND_HIDDEN is legacy and we expect that all new ports will define PI_STATIC_AND_HIDDEN. Current ports defining PI_STATIC_AND_HIDDEN are more than the opposite. Change the configure default. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
195 lines
6.1 KiB
Plaintext
195 lines
6.1 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
|
|
# Local configure fragment for sysdeps/x86.
|
|
|
|
if test $enable_cet != no; then
|
|
# Check if CET can be enabled.
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether CET can be enabled" >&5
|
|
$as_echo_n "checking whether CET can be enabled... " >&6; }
|
|
if ${libc_cv_x86_cet_available+:} false; then :
|
|
$as_echo_n "(cached) " >&6
|
|
else
|
|
cat > conftest.c <<EOF
|
|
#if !defined __CET__ || __CET__ != 3
|
|
# error CET isn't available.
|
|
#endif
|
|
EOF
|
|
if { ac_try='${CC-cc} -c $CFLAGS -fcf-protection -include cet.h conftest.c 1>&5'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
|
|
test $ac_status = 0; }; }; then
|
|
libc_cv_x86_cet_available=yes
|
|
else
|
|
libc_cv_x86_cet_available=no
|
|
fi
|
|
rm -rf conftest*
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_x86_cet_available" >&5
|
|
$as_echo "$libc_cv_x86_cet_available" >&6; }
|
|
if test $libc_cv_x86_cet_available != yes; then
|
|
as_fn_error $? "$CC doesn't support CET" "$LINENO" 5
|
|
fi
|
|
fi
|
|
if test $enable_cet != no; then
|
|
# Check if assembler supports CET.
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $AS supports CET" >&5
|
|
$as_echo_n "checking whether $AS supports CET... " >&6; }
|
|
if ${libc_cv_x86_cet_as+:} false; then :
|
|
$as_echo_n "(cached) " >&6
|
|
else
|
|
cat > conftest.s <<EOF
|
|
incsspd %ecx
|
|
EOF
|
|
if { ac_try='${CC-cc} -c $CFLAGS conftest.s -o conftest.o 1>&5'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
|
|
test $ac_status = 0; }; }; then
|
|
libc_cv_x86_cet_as=yes
|
|
else
|
|
libc_cv_x86_cet_as=no
|
|
fi
|
|
rm -rf conftest*
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_x86_cet_as" >&5
|
|
$as_echo "$libc_cv_x86_cet_as" >&6; }
|
|
if test $libc_cv_x86_cet_as = no; then
|
|
as_fn_error $? "$AS doesn't support CET" "$LINENO" 5
|
|
fi
|
|
fi
|
|
if test $enable_cet = yes; then
|
|
$as_echo "#define DEFAULT_DL_X86_CET_CONTROL cet_elf_property" >>confdefs.h
|
|
|
|
elif test $enable_cet = permissive; then
|
|
$as_echo "#define DEFAULT_DL_X86_CET_CONTROL cet_permissive" >>confdefs.h
|
|
|
|
fi
|
|
config_vars="$config_vars
|
|
enable-cet = $enable_cet"
|
|
|
|
# Check if linker supports x86 ISA level.
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for linker x86 ISA level support" >&5
|
|
$as_echo_n "checking for linker x86 ISA level support... " >&6; }
|
|
if ${libc_cv_include_x86_isa_level+:} false; then :
|
|
$as_echo_n "(cached) " >&6
|
|
else
|
|
cat > conftest1.S <<EOF
|
|
#ifdef __LP64__
|
|
# define P2ALIGN 3
|
|
#else
|
|
# define P2ALIGN 2
|
|
#endif
|
|
.section ".note.gnu.property", "a"
|
|
.p2align P2ALIGN
|
|
.long 1f - 0f /* name length. */
|
|
.long 4f - 1f /* data length. */
|
|
/* NT_GNU_PROPERTY_TYPE_0 */
|
|
.long 5 /* note type. */
|
|
0:
|
|
.asciz "GNU" /* vendor name. */
|
|
1:
|
|
.p2align P2ALIGN
|
|
/* GNU_PROPERTY_X86_ISA_1_NEEDED */
|
|
.long 0xc0008002 /* pr_type. */
|
|
.long 3f - 2f /* pr_datasz. */
|
|
2:
|
|
.long 0x1
|
|
3:
|
|
.p2align P2ALIGN
|
|
4:
|
|
EOF
|
|
cat > conftest2.S <<EOF
|
|
#ifdef __LP64__
|
|
# define P2ALIGN 3
|
|
#else
|
|
# define P2ALIGN 2
|
|
#endif
|
|
.section ".note.gnu.property", "a"
|
|
.p2align P2ALIGN
|
|
.long 1f - 0f /* name length. */
|
|
.long 4f - 1f /* data length. */
|
|
/* NT_GNU_PROPERTY_TYPE_0 */
|
|
.long 5 /* note type. */
|
|
0:
|
|
.asciz "GNU" /* vendor name. */
|
|
1:
|
|
.p2align P2ALIGN
|
|
/* GNU_PROPERTY_X86_ISA_1_NEEDED */
|
|
.long 0xc0008002 /* pr_type. */
|
|
.long 3f - 2f /* pr_datasz. */
|
|
2:
|
|
.long 0x2
|
|
3:
|
|
.p2align P2ALIGN
|
|
4:
|
|
EOF
|
|
libc_cv_include_x86_isa_level=no
|
|
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -nostartfiles -nostdlib -r -o conftest conftest1.S conftest2.S'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
|
|
test $ac_status = 0; }; }; 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*
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_include_x86_isa_level" >&5
|
|
$as_echo "$libc_cv_include_x86_isa_level" >&6; }
|
|
if test $libc_cv_include_x86_isa_level = yes; then
|
|
$as_echo "#define INCLUDE_X86_ISA_LEVEL 1" >>confdefs.h
|
|
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for LAHF/SAHF instruction support" >&5
|
|
$as_echo_n "checking for LAHF/SAHF instruction support... " >&6; }
|
|
if ${libc_cv_have_x86_lahf_sahf+:} false; then :
|
|
$as_echo_n "(cached) " >&6
|
|
else
|
|
libc_cv_have_x86_lahf_sahf=no
|
|
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -fverbose-asm -S -o - -x c /dev/null'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
|
|
test $ac_status = 0; }; } | grep -qE '(-msahf\b|-march=x86-64-v)'; then
|
|
libc_cv_have_x86_lahf_sahf=yes
|
|
fi
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_have_x86_lahf_sahf" >&5
|
|
$as_echo "$libc_cv_have_x86_lahf_sahf" >&6; }
|
|
if test $libc_cv_have_x86_lahf_sahf = yes; then
|
|
$as_echo "#define HAVE_X86_LAHF_SAHF 1" >>confdefs.h
|
|
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MOVBE instruction support" >&5
|
|
$as_echo_n "checking for MOVBE instruction support... " >&6; }
|
|
if ${libc_cv_have_x86_movbe+:} false; then :
|
|
$as_echo_n "(cached) " >&6
|
|
else
|
|
libc_cv_have_x86_movbe=no
|
|
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -fverbose-asm -S -o - -x c /dev/null'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
|
|
test $ac_status = 0; }; } | grep -qE '(-mmovbe\b|-march=x86-64-v([3-9]|[1-9][0-9]))'; then
|
|
libc_cv_have_x86_movbe=yes
|
|
fi
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_have_x86_movbe" >&5
|
|
$as_echo "$libc_cv_have_x86_movbe" >&6; }
|
|
if test $libc_cv_have_x86_movbe = yes; then
|
|
$as_echo "#define HAVE_X86_MOVBE 1" >>confdefs.h
|
|
|
|
fi
|
|
fi
|
|
config_vars="$config_vars
|
|
enable-x86-isa-level = $libc_cv_include_x86_isa_level"
|
|
|
|
$as_echo "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
|
|
|