diff options
Diffstat (limited to 'arch/x86/include/asm/text-patching.h')
| -rw-r--r-- | arch/x86/include/asm/text-patching.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/x86/include/asm/text-patching.h b/arch/x86/include/asm/text-patching.h index 880b5515b1d6..70c09967a999 100644 --- a/arch/x86/include/asm/text-patching.h +++ b/arch/x86/include/asm/text-patching.h @@ -18,6 +18,20 @@ static inline void apply_paravirt(struct paravirt_patch_site *start, #define __parainstructions_end NULL #endif +/* + * Currently, the max observed size in the kernel code is + * JUMP_LABEL_NOP_SIZE/RELATIVEJUMP_SIZE, which are 5. + * Raise it if needed. + */ +#define POKE_MAX_OPCODE_SIZE 5 + +struct text_poke_loc { + void *detour; + void *addr; + size_t len; + const char opcode[POKE_MAX_OPCODE_SIZE]; +}; + extern void text_poke_early(void *addr, const void *opcode, size_t len); /* @@ -38,6 +52,7 @@ extern void *text_poke(void *addr, const void *opcode, size_t len); extern void *text_poke_kgdb(void *addr, const void *opcode, size_t len); extern int poke_int3_handler(struct pt_regs *regs); extern void text_poke_bp(void *addr, const void *opcode, size_t len, void *handler); +extern void text_poke_bp_batch(struct text_poke_loc *tp, unsigned int nr_entries); extern int after_bootmem; extern __ro_after_init struct mm_struct *poking_mm; extern __ro_after_init unsigned long poking_addr; @@ -51,7 +66,6 @@ static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip) #define INT3_INSN_SIZE 1 #define CALL_INSN_SIZE 5 -#ifdef CONFIG_X86_64 static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val) { /* @@ -69,7 +83,6 @@ static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func) int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE); int3_emulate_jmp(regs, func); } -#endif /* CONFIG_X86_64 */ #endif /* !CONFIG_UML_X86 */ #endif /* _ASM_X86_TEXT_PATCHING_H */ |