diff options
| author | Nicolas Pitre <nico@fluxnic.net> | 2010-07-14 05:21:22 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-14 23:28:06 +0100 |
| commit | 0ebe25f90cd99bb1bcf622ec8a841421d48380d6 (patch) | |
| tree | ccd150cc328b87b13ea00379a3b6ea8e3c6469d0 | |
| parent | d8495378e25b3ffd40d7a78effba2566f1fe65cf (diff) | |
ARM: 6226/1: fix kprobe bug in ldr instruction emulation
From: Bin Yang <bin.yang@marvell.com>
Cc: stable@kernel.org
Signed-off-by: Bin Yang <bin.yang@marvell.com>
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/kernel/kprobes-decode.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/kernel/kprobes-decode.c b/arch/arm/kernel/kprobes-decode.c index da1f94906a4..8bccbfa693f 100644 --- a/arch/arm/kernel/kprobes-decode.c +++ b/arch/arm/kernel/kprobes-decode.c @@ -583,13 +583,14 @@ static void __kprobes emulate_ldr(struct kprobe *p, struct pt_regs *regs) { insn_llret_3arg_fn_t *i_fn = (insn_llret_3arg_fn_t *)&p->ainsn.insn[0]; kprobe_opcode_t insn = p->opcode; + long ppc = (long)p->addr + 8; union reg_pair fnr; int rd = (insn >> 12) & 0xf; int rn = (insn >> 16) & 0xf; int rm = insn & 0xf; long rdv; - long rnv = regs->uregs[rn]; - long rmv = regs->uregs[rm]; /* rm/rmv may be invalid, don't care. */ + long rnv = (rn == 15) ? ppc : regs->uregs[rn]; + long rmv = (rm == 15) ? ppc : regs->uregs[rm]; long cpsr = regs->ARM_cpsr; fnr.dr = insnslot_llret_3arg_rflags(rnv, 0, rmv, cpsr, i_fn); |