125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
/* Functions for x86 GNU property.
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Copyright (C) 2017-2021 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "output.h"
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#include "linux-common.h"
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static void
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emit_gnu_property (unsigned int type, unsigned int data)
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{
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int p2align = ptr_mode == SImode ? 2 : 3;
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switch_to_section (get_section (".note.gnu.property",
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SECTION_NOTYPE, NULL));
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ASM_OUTPUT_ALIGN (asm_out_file, p2align);
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/* name length. */
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fprintf (asm_out_file, ASM_LONG "1f - 0f\n");
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/* data length. */
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fprintf (asm_out_file, ASM_LONG "4f - 1f\n");
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/* note type: NT_GNU_PROPERTY_TYPE_0. */
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fprintf (asm_out_file, ASM_LONG "5\n");
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fprintf (asm_out_file, "0:\n");
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/* vendor name: "GNU". */
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fprintf (asm_out_file, STRING_ASM_OP "\"GNU\"\n");
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fprintf (asm_out_file, "1:\n");
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ASM_OUTPUT_ALIGN (asm_out_file, p2align);
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/* pr_type. */
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fprintf (asm_out_file, ASM_LONG "0x%x\n", type);
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/* pr_datasz. */
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fprintf (asm_out_file, ASM_LONG "3f - 2f\n");
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fprintf (asm_out_file, "2:\n");
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fprintf (asm_out_file, ASM_LONG "0x%x\n", data);
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fprintf (asm_out_file, "3:\n");
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ASM_OUTPUT_ALIGN (asm_out_file, p2align);
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fprintf (asm_out_file, "4:\n");
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}
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void
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file_end_indicate_exec_stack_and_gnu_property (void)
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{
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file_end_indicate_exec_stack ();
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if (flag_cf_protection == CF_NONE && !ix86_needed)
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return;
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unsigned int feature_1 = 0;
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if (flag_cf_protection & CF_BRANCH)
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/* GNU_PROPERTY_X86_FEATURE_1_IBT. */
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feature_1 |= 0x1;
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if (flag_cf_protection & CF_RETURN)
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/* GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
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feature_1 |= 0x2;
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/* Generate GNU_PROPERTY_X86_FEATURE_1_AND. */
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if (feature_1)
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emit_gnu_property (0xc0000002, feature_1);
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unsigned int isa_1 = 0;
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if (ix86_needed)
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{
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/* GNU_PROPERTY_X86_ISA_1_BASELINE. */
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if (TARGET_64BIT
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|| TARGET_FXSR
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|| TARGET_80387
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|| TARGET_MMX
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|| TARGET_SSE
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|| TARGET_SSE2)
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isa_1 |= 1 << 0;
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/* GNU_PROPERTY_X86_ISA_1_V2. */
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if (TARGET_CMPXCHG16B
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|| (TARGET_64BIT && TARGET_SAHF)
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|| TARGET_POPCNT
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|| TARGET_SSE3
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|| TARGET_SSSE3
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|| TARGET_SSE4_1
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|| TARGET_SSE4_2)
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isa_1 |= 1 << 1;
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/* GNU_PROPERTY_X86_ISA_1_V3. */
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if (TARGET_AVX
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|| TARGET_AVX2
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|| TARGET_F16C
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|| TARGET_FMA
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|| TARGET_LZCNT
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|| TARGET_MOVBE
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|| TARGET_XSAVE)
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isa_1 |= 1 << 2;
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/* GNU_PROPERTY_X86_ISA_1_V4. */
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if (TARGET_AVX512F
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|| TARGET_AVX512BW
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|| TARGET_AVX512CD
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|| TARGET_AVX512DQ
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|| TARGET_AVX512VL)
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isa_1 |= 1 << 3;
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}
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/* Generate GNU_PROPERTY_X86_ISA_1_NEEDED. */
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if (isa_1)
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emit_gnu_property (0xc0008002, isa_1);
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}
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