diff options
Diffstat (limited to 'gcc-4.9/gcc/config/i386/i386-opts.h')
-rw-r--r-- | gcc-4.9/gcc/config/i386/i386-opts.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/i386/i386-opts.h b/gcc-4.9/gcc/config/i386/i386-opts.h index 47a34dbf7..f44620781 100644 --- a/gcc-4.9/gcc/config/i386/i386-opts.h +++ b/gcc-4.9/gcc/config/i386/i386-opts.h @@ -93,4 +93,17 @@ enum stack_protector_guard { SSP_GLOBAL /* global canary */ }; +/* This is used to mitigate variant #2 of the speculative execution + vulnerabilities on x86 processors identified by CVE-2017-5715, aka + Spectre. They convert indirect branches and function returns to + call and return thunks to avoid speculative execution via indirect + call, jmp and ret. */ +enum indirect_branch { + indirect_branch_unset = 0, + indirect_branch_keep, + indirect_branch_thunk, + indirect_branch_thunk_inline, + indirect_branch_thunk_extern +}; + #endif |