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| author | Peter Zijlstra <peterz@infradead.org> | 2022-03-08 18:30:32 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-03-15 12:32:38 +0300 |
| commit | cc66bb91457827f62e2b6cb2518666820f0a6c48 (patch) | |
| tree | dcb636aca2a74467522c1d1b6896aa6c530cbac8 /include/linux/kprobes.h | |
| parent | e52fc2cf3f662828cc0d51c4b73bed73ad275fce (diff) | |
| download | linux-cc66bb91457827f62e2b6cb2518666820f0a6c48.tar.xz | |
x86/ibt,kprobes: Cure sym+0 equals fentry woes
In order to allow kprobes to skip the ENDBR instructions at sym+0 for
X86_KERNEL_IBT builds, change _kprobe_addr() to take an architecture
callback to inspect the function at hand and modify the offset if
needed.
This streamlines the existing interface to cover more cases and
require less hooks. Once PowerPC gets fully converted there will only
be the one arch hook.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154318.405947704@infradead.org
Diffstat (limited to 'include/linux/kprobes.h')
| -rw-r--r-- | include/linux/kprobes.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index 19b884353b15..9c28f7a0ef42 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -265,7 +265,6 @@ extern int arch_init_kprobes(void); extern void kprobes_inc_nmissed_count(struct kprobe *p); extern bool arch_within_kprobe_blacklist(unsigned long addr); extern int arch_populate_kprobe_blacklist(void); -extern bool arch_kprobe_on_func_entry(unsigned long offset); extern int kprobe_on_func_entry(kprobe_opcode_t *addr, const char *sym, unsigned long offset); extern bool within_kprobe_blacklist(unsigned long addr); @@ -384,6 +383,8 @@ static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void) } kprobe_opcode_t *kprobe_lookup_name(const char *name, unsigned int offset); +kprobe_opcode_t *arch_adjust_kprobe_addr(unsigned long addr, unsigned long offset, bool *on_func_entry); + int register_kprobe(struct kprobe *p); void unregister_kprobe(struct kprobe *p); int register_kprobes(struct kprobe **kps, int num); |