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| author | Peter Zijlstra <peterz@infradead.org> | 2022-06-14 23:15:38 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-06-27 10:33:58 +0200 |
| commit | d9e9d2300681d68a775c28de6aa6e5290ae17796 (patch) | |
| tree | f67d4b228c6c59ba6ec95aa48099040dbbb6fc3b /tools/objtool/arch | |
| parent | 15e67227c49a57837108acfe1c80570e1bd9f962 (diff) | |
| download | lwn-d9e9d2300681d68a775c28de6aa6e5290ae17796.tar.gz lwn-d9e9d2300681d68a775c28de6aa6e5290ae17796.zip | |
x86,objtool: Create .return_sites
Find all the return-thunk sites and record them in a .return_sites
section such that the kernel can undo this.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'tools/objtool/arch')
| -rw-r--r-- | tools/objtool/arch/x86/decode.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c index 8b990a52aada..c260006106be 100644 --- a/tools/objtool/arch/x86/decode.c +++ b/tools/objtool/arch/x86/decode.c @@ -787,3 +787,8 @@ bool arch_is_retpoline(struct symbol *sym) { return !strncmp(sym->name, "__x86_indirect_", 15); } + +bool arch_is_rethunk(struct symbol *sym) +{ + return !strcmp(sym->name, "__x86_return_thunk"); +} |