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9b7091415a
_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>
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/* Test TLSDESC relocation with AMX.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdbool.h>
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#include <asm/prctl.h>
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#include <support/check.h>
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#include "tst-gnu2-tls2-amx.h"
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extern int arch_prctl (int, ...);
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#define X86_XSTATE_TILECFG_ID 17
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#define X86_XSTATE_TILEDATA_ID 18
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/* Initialize tile config. */
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__attribute__ ((noinline, noclone))
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static void
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init_tile_config (__tilecfg *tileinfo)
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{
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int i;
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tileinfo->palette_id = 1;
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tileinfo->start_row = 0;
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tileinfo->colsb[0] = MAX_ROWS;
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tileinfo->rows[0] = MAX_ROWS;
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for (i = 1; i < 4; ++i)
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{
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tileinfo->colsb[i] = MAX_COLS;
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tileinfo->rows[i] = MAX_ROWS;
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}
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_tile_loadconfig (tileinfo);
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}
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static bool
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enable_amx (void)
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{
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uint64_t bitmask;
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if (arch_prctl (ARCH_GET_XCOMP_PERM, &bitmask) != 0)
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return false;
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if ((bitmask & (1 << X86_XSTATE_TILECFG_ID)) == 0)
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return false;
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if (arch_prctl (ARCH_REQ_XCOMP_PERM, X86_XSTATE_TILEDATA_ID) != 0)
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return false;
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/* Load tile configuration. */
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__tilecfg tile_data = { 0 };
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init_tile_config (&tile_data);
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return true;
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}
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/* An architecture can define it to clobber caller-saved registers in
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malloc below to verify that the implicit TLSDESC call won't change
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caller-saved registers. */
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static void
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clear_tile_register (void)
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{
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_tile_zero (2);
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}
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#define MOD(i) "tst-gnu2-tls2-amx-mod" #i ".so"
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#define IS_SUPPORTED() enable_amx ()
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#define PREPARE_MALLOC() clear_tile_register ()
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#include <elf/tst-gnu2-tls2.c>
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