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comparison gcc/config/i386/i386-opts.h @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children 1830386684a0
comparison
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111:04ced10e8804 131:84e7813d76e9
1 /* Definitions for option handling for IA-32. 1 /* Definitions for option handling for IA-32.
2 Copyright (C) 1988-2017 Free Software Foundation, Inc. 2 Copyright (C) 1988-2018 Free Software Foundation, Inc.
3 3
4 This file is part of GCC. 4 This file is part of GCC.
5 5
6 GCC is free software; you can redistribute it and/or modify 6 GCC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by 7 it under the terms of the GNU General Public License as published by
97 enum stack_protector_guard { 97 enum stack_protector_guard {
98 SSP_TLS, /* per-thread canary in TLS block */ 98 SSP_TLS, /* per-thread canary in TLS block */
99 SSP_GLOBAL /* global canary */ 99 SSP_GLOBAL /* global canary */
100 }; 100 };
101 101
102 enum prefer_vector_width {
103 PVW_NONE,
104 PVW_AVX128,
105 PVW_AVX256,
106 PVW_AVX512
107 };
108
109 /* This is used to mitigate variant #2 of the speculative execution
110 vulnerabilities on x86 processors identified by CVE-2017-5715, aka
111 Spectre. They convert indirect branches and function returns to
112 call and return thunks to avoid speculative execution via indirect
113 call, jmp and ret. */
114 enum indirect_branch {
115 indirect_branch_unset = 0,
116 indirect_branch_keep,
117 indirect_branch_thunk,
118 indirect_branch_thunk_inline,
119 indirect_branch_thunk_extern
120 };
121
102 #endif 122 #endif