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a4c75cfd56
This patch saves and restores bound registers in symbol lookup for x86-64: 1. Branches without BND prefix clear bound registers. 2. x86-64 pass bounds in bound registers as specified in MPX psABI extension on hjl/mpx/master branch at https://github.com/hjl-tools/x86-64-psABI https://groups.google.com/forum/#!topic/x86-64-abi/KFsB0XTgWYc Binutils has been updated to create an alternate PLT to add BND prefix when branching to ld.so. * config.h.in (HAVE_MPX_SUPPORT): New #undef. * sysdeps/x86_64/configure.ac: Set HAVE_MPX_SUPPORT. * sysdeps/x86_64/configure: Regenerated. * sysdeps/x86_64/dl-trampoline.S (REGISTER_SAVE_AREA): New macro. (REGISTER_SAVE_RAX): Likewise. (REGISTER_SAVE_RCX): Likewise. (REGISTER_SAVE_RDX): Likewise. (REGISTER_SAVE_RSI): Likewise. (REGISTER_SAVE_RDI): Likewise. (REGISTER_SAVE_R8): Likewise. (REGISTER_SAVE_R9): Likewise. (REGISTER_SAVE_BND0): Likewise. (REGISTER_SAVE_BND1): Likewise. (REGISTER_SAVE_BND2): Likewise. (_dl_runtime_resolve): Use them. Save and restore Intel MPX bound registers when calling _dl_fixup.
97 lines
3.0 KiB
Plaintext
97 lines
3.0 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/x86_64.
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AC_CHECK_HEADER([cpuid.h], ,
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[AC_MSG_ERROR([gcc must provide the <cpuid.h> header])],
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[/* No default includes. */])
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dnl Check if -msse4 works.
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AC_CACHE_CHECK(for SSE4 support, libc_cv_cc_sse4, [dnl
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LIBC_TRY_CC_OPTION([-msse4], [libc_cv_cc_sse4=yes], [libc_cv_cc_sse4=no])
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])
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if test $libc_cv_cc_sse4 = yes; then
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AC_DEFINE(HAVE_SSE4_SUPPORT)
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fi
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LIBC_CONFIG_VAR([config-cflags-sse4], [$libc_cv_cc_sse4])
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dnl Check if -mavx works.
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AC_CACHE_CHECK(for AVX support, libc_cv_cc_avx, [dnl
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LIBC_TRY_CC_OPTION([-mavx], [libc_cv_cc_avx=yes], [libc_cv_cc_avx=no])
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])
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if test $libc_cv_cc_avx = yes; then
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AC_DEFINE(HAVE_AVX_SUPPORT)
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fi
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LIBC_CONFIG_VAR([config-cflags-avx], [$libc_cv_cc_avx])
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dnl Check if asm supports AVX512.
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AC_CACHE_CHECK(for AVX512 support in assembler, libc_cv_asm_avx512, [dnl
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cat > conftest.s <<\EOF
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vmovdqu64 %zmm0, (%rsp)
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EOF
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if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_asm_avx512=yes
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else
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libc_cv_asm_avx512=no
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fi
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rm -f conftest*])
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if test $libc_cv_asm_avx512 == yes; then
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AC_DEFINE(HAVE_AVX512_ASM_SUPPORT)
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fi
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dnl Check if -mavx512f works.
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AC_CACHE_CHECK(for AVX512 support, libc_cv_cc_avx512, [dnl
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LIBC_TRY_CC_OPTION([-mavx512f], [libc_cv_cc_avx512=$libc_cv_asm_avx512], [libc_cv_cc_avx512=no])
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])
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if test $libc_cv_cc_avx512 = yes; then
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AC_DEFINE(HAVE_AVX512_SUPPORT)
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fi
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LIBC_CONFIG_VAR([config-cflags-avx512], [$libc_cv_cc_avx512])
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dnl Check if -msse2avx works.
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AC_CACHE_CHECK(for AVX encoding of SSE instructions, libc_cv_cc_sse2avx, [dnl
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LIBC_TRY_CC_OPTION([-msse2avx],
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[libc_cv_cc_sse2avx=yes],
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[libc_cv_cc_sse2avx=no])
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])
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if test $libc_cv_cc_sse2avx = yes; then
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AC_DEFINE(HAVE_SSE2AVX_SUPPORT)
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fi
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LIBC_CONFIG_VAR([config-cflags-sse2avx], [$libc_cv_cc_sse2avx])
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dnl Check if -mfma4 works.
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AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl
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LIBC_TRY_CC_OPTION([-mfma4], [libc_cv_cc_fma4=yes], [libc_cv_cc_fma4=no])
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])
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if test $libc_cv_cc_fma4 = yes; then
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AC_DEFINE(HAVE_FMA4_SUPPORT)
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fi
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LIBC_CONFIG_VAR([have-mfma4], [$libc_cv_cc_fma4])
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dnl Check if -mno-vzeroupper works.
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AC_CACHE_CHECK(for -mno-vzeroupper support, libc_cv_cc_novzeroupper, [dnl
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LIBC_TRY_CC_OPTION([-mno-vzeroupper],
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[libc_cv_cc_novzeroupper=yes],
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[libc_cv_cc_novzeroupper=no])
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])
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LIBC_CONFIG_VAR([config-cflags-novzeroupper], [$libc_cv_cc_novzeroupper])
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dnl Check whether asm supports Intel MPX
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AC_CACHE_CHECK(for Intel MPX support, libc_cv_asm_mpx, [dnl
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cat > conftest.s <<\EOF
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bndmov %bnd0,(%rsp)
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EOF
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if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_asm_mpx=yes
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else
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libc_cv_asm_mpx=no
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fi
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rm -f conftest*])
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if test $libc_cv_asm_mpx == yes; then
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AC_DEFINE(HAVE_MPX_SUPPORT)
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fi
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dnl It is always possible to access static and hidden symbols in an
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dnl position independent way.
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AC_DEFINE(PI_STATIC_AND_HIDDEN)
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# work around problem with autoconf and empty lines at the end of files
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