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| author | Steven Whitehouse <swhiteho@redhat.com> | 2006-02-27 13:27:34 -0500 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-02-27 13:27:34 -0500 |
| commit | f3b270a47882b958e9e3c5bd86894e3a7072899a (patch) | |
| tree | de3bdfd5d67e8310257b93ac3d8d703599b9d929 /arch/i386/kernel/kprobes.c | |
| parent | 116ad29d9839610d2811a1962cac7f3f2a9f9295 (diff) | |
| parent | b9a33cebac70d6f67a769ce8d4078fee2b254ada (diff) | |
| download | lwn-f3b270a47882b958e9e3c5bd86894e3a7072899a.tar.gz lwn-f3b270a47882b958e9e3c5bd86894e3a7072899a.zip | |
Merge branch 'master'
Diffstat (limited to 'arch/i386/kernel/kprobes.c')
| -rw-r--r-- | arch/i386/kernel/kprobes.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/i386/kernel/kprobes.c b/arch/i386/kernel/kprobes.c index 6483eeb1a4e8..694a13997637 100644 --- a/arch/i386/kernel/kprobes.c +++ b/arch/i386/kernel/kprobes.c @@ -58,6 +58,11 @@ static inline int is_IF_modifier(kprobe_opcode_t opcode) int __kprobes arch_prepare_kprobe(struct kprobe *p) { + /* insn: must be on special executable page on i386. */ + p->ainsn.insn = get_insn_slot(); + if (!p->ainsn.insn) + return -ENOMEM; + memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t)); p->opcode = *p->addr; return 0; @@ -77,6 +82,13 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p) (unsigned long) p->addr + sizeof(kprobe_opcode_t)); } +void __kprobes arch_remove_kprobe(struct kprobe *p) +{ + down(&kprobe_mutex); + free_insn_slot(p->ainsn.insn); + up(&kprobe_mutex); +} + static inline void save_previous_kprobe(struct kprobe_ctlblk *kcb) { kcb->prev_kprobe.kp = kprobe_running(); @@ -111,7 +123,7 @@ static inline void prepare_singlestep(struct kprobe *p, struct pt_regs *regs) if (p->opcode == BREAKPOINT_INSTRUCTION) regs->eip = (unsigned long)p->addr; else - regs->eip = (unsigned long)&p->ainsn.insn; + regs->eip = (unsigned long)p->ainsn.insn; } /* Called with kretprobe_lock held */ @@ -351,7 +363,7 @@ static void __kprobes resume_execution(struct kprobe *p, { unsigned long *tos = (unsigned long *)®s->esp; unsigned long next_eip = 0; - unsigned long copy_eip = (unsigned long)&p->ainsn.insn; + unsigned long copy_eip = (unsigned long)p->ainsn.insn; unsigned long orig_eip = (unsigned long)p->addr; switch (p->ainsn.insn[0]) { |