diff options
| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2023-02-25 10:52:57 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-02-25 17:12:17 +0300 |
| commit | fcf77d016216ae75a19078e1079c2511a6319a49 (patch) | |
| tree | 23eedd8b706bcec957e3b86f20412aa3b101ca30 /arch/loongarch/include | |
| parent | 09e679c28a4def4ea8d4f618503c1d55c355ae5c (diff) | |
| download | linux-fcf77d016216ae75a19078e1079c2511a6319a49.tar.xz | |
LoongArch: Mark some assembler symbols as non-kprobe-able
Some assembler symbols are not kprobe safe, such as handle_syscall (used
as syscall exception handler), *memset*/*memcpy*/*memmove* (may cause
recursive exceptions), they can not be instrumented, just blacklist them
for kprobing.
Here is a related problem and discussion:
Link: https://lore.kernel.org/lkml/20230114143859.7ccc45c1c5d9ce302113ab0a@kernel.org/
Tested-by: Jeff Xie <xiehuan09@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include')
| -rw-r--r-- | arch/loongarch/include/asm/asm.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/asm.h b/arch/loongarch/include/asm/asm.h index 40eea6aa469e..f591b3245def 100644 --- a/arch/loongarch/include/asm/asm.h +++ b/arch/loongarch/include/asm/asm.h @@ -188,4 +188,14 @@ #define PTRLOG 3 #endif +/* Annotate a function as being unsuitable for kprobes. */ +#ifdef CONFIG_KPROBES +#define _ASM_NOKPROBE(name) \ + .pushsection "_kprobe_blacklist", "aw"; \ + .quad name; \ + .popsection +#else +#define _ASM_NOKPROBE(name) +#endif + #endif /* __ASM_ASM_H */ |