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| author | Nicolas Pitre <nico@fluxnic.net> | 2010-07-14 05:21:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-02 10:26:41 -0700 |
| commit | b7806456d7c10c64da49005a911ba0a4998e9d1c (patch) | |
| tree | 8079217799f7f38b7f907b60acf8cc4f2d0fc453 /arch | |
| parent | c7dd3877b61ae7dc0c5815bba9f61ae0ad98e353 (diff) | |
| download | lwn-b7806456d7c10c64da49005a911ba0a4998e9d1c.tar.gz lwn-b7806456d7c10c64da49005a911ba0a4998e9d1c.zip | |
ARM: 6226/1: fix kprobe bug in ldr instruction emulation
commit 0ebe25f90cd99bb1bcf622ec8a841421d48380d6 upstream.
From: Bin Yang <bin.yang@marvell.com>
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -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 da1f94906a4e..8bccbfa693ff 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); |