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GCC 11 supports -march=x86-64-v[234] to enable x86 micro-architecture ISA levels: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97250 and -mneeded to emit GNU_PROPERTY_X86_ISA_1_NEEDED property with GNU_PROPERTY_X86_ISA_1_V[234] marker: https://gitlab.com/x86-psABIs/x86-64-ABI/-/merge_requests/13 Binutils support for GNU_PROPERTY_X86_ISA_1_V[234] marker were added by commit b0ab06937385e0ae25cebf1991787d64f439bf12 Author: H.J. Lu <hjl.tools@gmail.com> Date: Fri Oct 30 06:49:57 2020 -0700 x86: Support GNU_PROPERTY_X86_ISA_1_BASELINE marker and commit 32930e4edbc06bc6f10c435dbcc63131715df678 Author: H.J. Lu <hjl.tools@gmail.com> Date: Fri Oct 9 05:05:57 2020 -0700 x86: Support GNU_PROPERTY_X86_ISA_1_V[234] marker GNU_PROPERTY_X86_ISA_1_NEEDED property in x86 ELF binaries indicate the micro-architecture ISA level required to execute the binary. The marker must be added by programmers explicitly in one of 3 ways: 1. Pass -mneeded to GCC. 2. Add the marker in the linker inputs as this patch does. 3. Pass -z x86-64-v[234] to the linker. Add GNU_PROPERTY_X86_ISA_1_BASELINE and GNU_PROPERTY_X86_ISA_1_V[234] marker support to ld.so if binutils 2.32 or newer is used to build glibc: 1. Add GNU_PROPERTY_X86_ISA_1_BASELINE and GNU_PROPERTY_X86_ISA_1_V[234] markers to elf.h. 2. Add GNU_PROPERTY_X86_ISA_1_BASELINE and GNU_PROPERTY_X86_ISA_1_V[234] marker to abi-note.o based on the ISA level used to compile abi-note.o, assuming that the same ISA level is used to compile the whole glibc. 3. Add isa_1 to cpu_features to record the supported x86 ISA level. 4. Rename _dl_process_cet_property_note to _dl_process_property_note and add GNU_PROPERTY_X86_ISA_1_V[234] marker detection. 5. Update _rtld_main_check and _dl_open_check to check loaded objects with the incompatible ISA level. 6. Add a testcase to verify that dlopen an x86-64-v4 shared object fails on lesser platforms. 7. Use <get-isa-level.h> in dl-hwcaps-subdirs.c and tst-glibc-hwcaps.c. Tested under i686, x32 and x86-64 modes on x86-64-v2, x86-64-v3 and x86-64-v4 machines. Marked elf/tst-isa-level-1 with x86-64-v4, ran it on x86-64-v3 machine and got: [hjl@gnu-cfl-2 build-x86_64-linux]$ ./elf/tst-isa-level-1 ./elf/tst-isa-level-1: CPU ISA level is lower than required [hjl@gnu-cfl-2 build-x86_64-linux]$
98 lines
3.3 KiB
C
98 lines
3.3 KiB
C
/* ELF program property for x86 ISA level.
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Copyright (C) 2020 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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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
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coming from the use of this file. (The Lesser General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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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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<https://www.gnu.org/licenses/>. */
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#include <elf.h>
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/* ELF program property for x86 ISA level. */
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#ifdef INCLUDE_X86_ISA_LEVEL
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# if defined __x86_64__ || defined __FXSR__ || !defined _SOFT_FLOAT \
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|| defined __MMX__ || defined __SSE__ || defined __SSE2__
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# define ISA_BASELINE GNU_PROPERTY_X86_ISA_1_BASELINE
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# else
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# define ISA_BASELINE 0
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# endif
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# if defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 \
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|| (defined __x86_64__ && defined __LAHF_SAHF__) \
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|| defined __POPCNT__ || defined __SSE3__ \
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|| defined __SSSE3__ || defined __SSE4_1__ || defined __SSE4_2__
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# define ISA_V2 GNU_PROPERTY_X86_ISA_1_V2
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# else
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# define ISA_V2 0
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# endif
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# if defined __AVX__ || defined __AVX2__ || defined __F16C__ \
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|| defined __FMA__ || defined __LZCNT__ || defined __MOVBE__ \
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|| defined __XSAVE__
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# define ISA_V3 GNU_PROPERTY_X86_ISA_1_V3
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# else
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# define ISA_V3 0
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# endif
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# if defined __AVX512F__ || defined __AVX512BW__ || defined __AVX512CD__ \
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|| defined __AVX512DQ__ || defined __AVX512VL__
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# define ISA_V4 GNU_PROPERTY_X86_ISA_1_V4
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# else
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# define ISA_V4 0
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# endif
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# ifndef ISA_LEVEL
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# define ISA_LEVEL (ISA_BASELINE | ISA_V2 | ISA_V3 | ISA_V4)
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# endif
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# if ISA_LEVEL
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# ifdef __LP64__
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# define PROPERTY_ALIGN 3
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# else
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# define PROPERTY_ALIGN 2
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# endif
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# define note_stringify(arg) note_stringify_1(arg)
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# define note_stringify_1(arg) #arg
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asm(".pushsection \".note.gnu.property\",\"a\",@note\n"
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" .p2align " note_stringify (PROPERTY_ALIGN)
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/* name length. */
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"\n .long 1f - 0f\n"
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/* data length. */
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" .long 4f - 1f\n"
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/* note type: NT_GNU_PROPERTY_TYPE_0. */
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" .long " note_stringify (NT_GNU_PROPERTY_TYPE_0)
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/* vendor name. */
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"\n0: .asciz \"GNU\"\n"
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"1: .p2align " note_stringify (PROPERTY_ALIGN)
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/* pr_type: GNU_PROPERTY_X86_ISA_1_NEEDED. */
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"\n .long " note_stringify (GNU_PROPERTY_X86_ISA_1_NEEDED)
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/* pr_datasz. */
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"\n .long 3f - 2f\n"
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/* GNU_PROPERTY_X86_ISA_1_V[234]. */
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"2:\n .long " note_stringify (ISA_LEVEL)
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"\n3:\n .p2align " note_stringify (PROPERTY_ALIGN)
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"\n4:\n .popsection");
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# endif /* ISA_LEVEL */
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#endif /* INCLUDE_X86_ISA_LEVEL */
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