---

yaml
---
r: 258351
b: refs/heads/master
c: 396b41f
h: refs/heads/master
i:
  258349: d55f1b7
  258347: 28db7dc
  258343: 8091206
  258335: ad50c0a
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 444956677eccfcdfe05de761e1286f62c423ce88
+refs/heads/master: 396b41f68d937a0c48ba624186ed06288b35bb4e

trunk/arch/arm/kernel/kprobes-thumb.c

@@ -141,6 +141,35 @@ t16_decode_it(kprobe_opcode_t insn, struct arch_specific_insn *asi)
 	return INSN_GOOD_NO_SLOT;
 }
 
+static void __kprobes
+t16_simulate_cond_branch(struct kprobe *p, struct pt_regs *regs)
+{
+	kprobe_opcode_t insn = p->opcode;
+	unsigned long pc = thumb_probe_pc(p);
+	long offset = insn & 0x7f;
+	offset -= insn & 0x80; /* Apply sign bit */
+	regs->ARM_pc = pc + (offset * 2);
+}
+
+static enum kprobe_insn __kprobes
+t16_decode_cond_branch(kprobe_opcode_t insn, struct arch_specific_insn *asi)
+{
+	int cc = (insn >> 8) & 0xf;
+	asi->insn_check_cc = kprobe_condition_checks[cc];
+	asi->insn_handler = t16_simulate_cond_branch;
+	return INSN_GOOD_NO_SLOT;
+}
+
+static void __kprobes
+t16_simulate_branch(struct kprobe *p, struct pt_regs *regs)
+{
+	kprobe_opcode_t insn = p->opcode;
+	unsigned long pc = thumb_probe_pc(p);
+	long offset = insn & 0x3ff;
+	offset -= insn & 0x400; /* Apply sign bit */
+	regs->ARM_pc = pc + (offset * 2);
+}
+
 static unsigned long __kprobes
 t16_emulate_loregs(struct kprobe *p, struct pt_regs *regs)
 {
@@ -472,6 +501,15 @@ const union decode_item kprobe_decode_thumb16_table[] = {
 	/* SVC				1101 1111 xxxx xxxx */
 	DECODE_REJECT	(0xfe00, 0xde00),
 
+	/* Conditional branch		1101 xxxx xxxx xxxx */
+	DECODE_CUSTOM	(0xf000, 0xd000, t16_decode_cond_branch),
+
+	/*
+	 * Unconditional branch
+	 * B				1110 0xxx xxxx xxxx
+	 */
+	DECODE_SIMULATE	(0xf800, 0xe000, t16_simulate_branch),
+
 	DECODE_END
 };