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| author |   Peter Zijlstra <peterz@infradead.org> | 2022-09-15 13:11:33 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-10-17 16:41:17 +0200 |
| commit | 396e0b8e09e86440c2119d12c2101110d3cd5bf9 (patch) | |
| tree | 1c1177879cb877b61d64b5851acdddb15fef01c2 /arch/x86/include/asm/alternative.h | |
| parent | kallsyms: Take callthunks into account (diff) | |
| download | wireguard-linux-396e0b8e09e86440c2119d12c2101110d3cd5bf9.tar.xz wireguard-linux-396e0b8e09e86440c2119d12c2101110d3cd5bf9.zip | |
x86/orc: Make it callthunk aware
Callthunks addresses on the stack would confuse the ORC unwinder. Handle
them correctly and tell ORC to proceed further down the stack.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220915111148.511637628@infradead.org
Diffstat (limited to 'arch/x86/include/asm/alternative.h')
| -rw-r--r-- | arch/x86/include/asm/alternative.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/alternative.h b/arch/x86/include/asm/alternative.h index 07ac25793a3f..4b8cd256c95e 100644 --- a/arch/x86/include/asm/alternative.h +++ b/arch/x86/include/asm/alternative.h @@ -92,6 +92,7 @@ extern void callthunks_patch_builtin_calls(void); extern void callthunks_patch_module_calls(struct callthunk_sites *sites, struct module *mod); extern void *callthunks_translate_call_dest(void *dest); +extern bool is_callthunk(void *addr); #else static __always_inline void callthunks_patch_builtin_calls(void) {} static __always_inline void @@ -101,6 +102,10 @@ static __always_inline void *callthunks_translate_call_dest(void *dest) { return dest; } +static __always_inline bool is_callthunk(void *addr) +{ + return false; +} #endif #ifdef CONFIG_SMP |