diff options
Diffstat (limited to 'arch/sparc64/kernel/kprobes.c')
| -rw-r--r-- | arch/sparc64/kernel/kprobes.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/arch/sparc64/kernel/kprobes.c b/arch/sparc64/kernel/kprobes.c index 7d97138f5d2e6..7066d7ba667a5 100644 --- a/arch/sparc64/kernel/kprobes.c +++ b/arch/sparc64/kernel/kprobes.c @@ -68,8 +68,14 @@ static inline void prepare_singlestep(struct kprobe *p, struct pt_regs *regs) current_kprobe_orig_tstate_pil = (regs->tstate & TSTATE_PIL); regs->tstate |= TSTATE_PIL; - regs->tpc = (unsigned long) &p->ainsn.insn[0]; - regs->tnpc = (unsigned long) &p->ainsn.insn[1]; + /*single step inline, if it a breakpoint instruction*/ + if (p->opcode == BREAKPOINT_INSTRUCTION) { + regs->tpc = (unsigned long) p->addr; + regs->tnpc = current_kprobe_orig_tnpc; + } else { + regs->tpc = (unsigned long) &p->ainsn.insn[0]; + regs->tnpc = (unsigned long) &p->ainsn.insn[1]; + } } static inline void disarm_kprobe(struct kprobe *p, struct pt_regs *regs) @@ -97,6 +103,12 @@ static int kprobe_handler(struct pt_regs *regs) */ p = get_kprobe(addr); if (p) { + if (kprobe_status == KPROBE_HIT_SS) { + regs->tstate = ((regs->tstate & ~TSTATE_PIL) | + current_kprobe_orig_tstate_pil); + unlock_kprobes(); + goto no_kprobe; + } disarm_kprobe(p, regs); ret = 1; } else { @@ -128,7 +140,7 @@ static int kprobe_handler(struct pt_regs *regs) kprobe_status = KPROBE_HIT_ACTIVE; current_kprobe = p; - if (p->pre_handler(p, regs)) + if (p->pre_handler && p->pre_handler(p, regs)) return 1; ss_probe: |