From: Nicolas Pitre <nico@cam.org>
Date: Thu, 21 Aug 2008 22:22:49 +0000 (+0100)
Subject: [ARM] 5221/1: fix ldm/stm emulation for kprobes
X-Git-Tag: firefly_0821_release~17401^2~9^2~44
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2d4b6c9aeb94cb9cb5c250f23e81e6d00b461372;p=firefly-linux-kernel-4.4.55.git

[ARM] 5221/1: fix ldm/stm emulation for kprobes

Logic for the p bit was reversed.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/kernel/kprobes-decode.c b/arch/arm/kernel/kprobes-decode.c
index b4565bb133c1..da1f94906a4e 100644
--- a/arch/arm/kernel/kprobes-decode.c
+++ b/arch/arm/kernel/kprobes-decode.c
@@ -488,7 +488,7 @@ static void __kprobes simulate_ldm1stm1(struct kprobe *p, struct pt_regs *regs)
 
 	if (!ubit)
 		addr -= reg_count;
-	addr += (!pbit ^ !ubit);
+	addr += (!pbit == !ubit);
 
 	reg_bit_vector = insn & 0xffff;
 	while (reg_bit_vector) {
@@ -503,7 +503,7 @@ static void __kprobes simulate_ldm1stm1(struct kprobe *p, struct pt_regs *regs)
 	if (wbit) {
 		if (!ubit)
 			addr -= reg_count;
-		addr -= (!pbit ^ !ubit);
+		addr -= (!pbit == !ubit);
 		regs->uregs[rn] = (long)addr;
 	}
 }