diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2024-02-28 12:08:03 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2024-04-01 10:55:17 -0700 |
| commit | 853e915fdd6ae6c5f1a7a68d2594ec8dbfef1286 (patch) | |
| tree | 4daa8c3b1c53af6e65a84c94abee88b11fef669b /sysdeps/x86_64/configure.ac | |
| parent | a364304718725a31ab141936322855c76c73e35e (diff) | |
| download | glibc-853e915fdd6ae6c5f1a7a68d2594ec8dbfef1286.tar.gz glibc-853e915fdd6ae6c5f1a7a68d2594ec8dbfef1286.tar.xz glibc-853e915fdd6ae6c5f1a7a68d2594ec8dbfef1286.zip | |
x86-64: Update _dl_tlsdesc_dynamic to preserve AMX registers
_dl_tlsdesc_dynamic should also preserve AMX registers which are caller-saved. Add X86_XSTATE_TILECFG_ID and X86_XSTATE_TILEDATA_ID to x86-64 TLSDESC_CALL_STATE_SAVE_MASK. Compute the AMX state size and save it in xsave_state_full_size which is only used by _dl_tlsdesc_dynamic_xsave and _dl_tlsdesc_dynamic_xsavec. This fixes the AMX part of BZ #31372. Tested on AMX processor. AMX test is enabled only for compilers with the fix for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114098 GCC 14 and GCC 11/12/13 branches have the bug fix. Reviewed-by: Sunil K Pandey <skpgkp2@gmail.com> (cherry picked from commit 9b7091415af47082664717210ac49d51551456ab)
Diffstat (limited to 'sysdeps/x86_64/configure.ac')
| -rw-r--r-- | sysdeps/x86_64/configure.ac | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sysdeps/x86_64/configure.ac b/sysdeps/x86_64/configure.ac index d1f803c02e..c714c47351 100644 --- a/sysdeps/x86_64/configure.ac +++ b/sysdeps/x86_64/configure.ac @@ -61,5 +61,20 @@ elif test $enable_cet = permissive; then fi LIBC_CONFIG_VAR([enable-cet], [$enable_cet]) +# Check if -mamx-tile works properly. +AC_CACHE_CHECK(whether -mamx-tile works properly, + libc_cv_x86_have_amx_tile, [dnl +cat > conftest.c <<EOF +#include <x86intrin.h> +EOF + libc_cv_x86_have_amx_tile=no + if AC_TRY_COMMAND(${CC-cc} -E $CFLAGS -mamx-tile conftest.c > conftest.i); then + if grep -q __builtin_ia32_ldtilecfg conftest.i; then + libc_cv_x86_have_amx_tile=yes + fi + fi + rm -rf conftest*]) +LIBC_CONFIG_VAR([have-mamx-tile], [$libc_cv_x86_have_amx_tile]) + test -n "$critic_missing" && AC_MSG_ERROR([ *** $critic_missing]) |