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-rw-r--r--arch/arm/include/asm/bug.h10
-rw-r--r--arch/arm/kernel/traps.c8
2 files changed, 11 insertions, 7 deletions
diff --git a/arch/arm/include/asm/bug.h b/arch/arm/include/asm/bug.h
index 7af5c6c3653a..b274bde24905 100644
--- a/arch/arm/include/asm/bug.h
+++ b/arch/arm/include/asm/bug.h
@@ -2,6 +2,8 @@
2#define _ASMARM_BUG_H 2#define _ASMARM_BUG_H
3 3
4#include <linux/linkage.h> 4#include <linux/linkage.h>
5#include <linux/types.h>
6#include <asm/opcodes.h>
5 7
6#ifdef CONFIG_BUG 8#ifdef CONFIG_BUG
7 9
@@ -12,10 +14,10 @@
12 */ 14 */
13#ifdef CONFIG_THUMB2_KERNEL 15#ifdef CONFIG_THUMB2_KERNEL
14#define BUG_INSTR_VALUE 0xde02 16#define BUG_INSTR_VALUE 0xde02
15#define BUG_INSTR_TYPE ".hword " 17#define BUG_INSTR(__value) __inst_thumb16(__value)
16#else 18#else
17#define BUG_INSTR_VALUE 0xe7f001f2 19#define BUG_INSTR_VALUE 0xe7f001f2
18#define BUG_INSTR_TYPE ".word " 20#define BUG_INSTR(__value) __inst_arm(__value)
19#endif 21#endif
20 22
21 23
@@ -33,7 +35,7 @@
33 35
34#define __BUG(__file, __line, __value) \ 36#define __BUG(__file, __line, __value) \
35do { \ 37do { \
36 asm volatile("1:\t" BUG_INSTR_TYPE #__value "\n" \ 38 asm volatile("1:\t" BUG_INSTR(__value) "\n" \
37 ".pushsection .rodata.str, \"aMS\", %progbits, 1\n" \ 39 ".pushsection .rodata.str, \"aMS\", %progbits, 1\n" \
38 "2:\t.asciz " #__file "\n" \ 40 "2:\t.asciz " #__file "\n" \
39 ".popsection\n" \ 41 ".popsection\n" \
@@ -48,7 +50,7 @@ do { \
48 50
49#define __BUG(__file, __line, __value) \ 51#define __BUG(__file, __line, __value) \
50do { \ 52do { \
51 asm volatile(BUG_INSTR_TYPE #__value); \ 53 asm volatile(BUG_INSTR(__value) "\n"); \
52 unreachable(); \ 54 unreachable(); \
53} while (0) 55} while (0)
54#endif /* CONFIG_DEBUG_BUGVERBOSE */ 56#endif /* CONFIG_DEBUG_BUGVERBOSE */
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index caf96da27360..6125f259b7b5 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -342,15 +342,17 @@ void arm_notify_die(const char *str, struct pt_regs *regs,
342int is_valid_bugaddr(unsigned long pc) 342int is_valid_bugaddr(unsigned long pc)
343{ 343{
344#ifdef CONFIG_THUMB2_KERNEL 344#ifdef CONFIG_THUMB2_KERNEL
345 unsigned short bkpt; 345 u16 bkpt;
346 u16 insn = __opcode_to_mem_thumb16(BUG_INSTR_VALUE);
346#else 347#else
347 unsigned long bkpt; 348 u32 bkpt;
349 u32 insn = __opcode_to_mem_arm(BUG_INSTR_VALUE);
348#endif 350#endif
349 351
350 if (probe_kernel_address((unsigned *)pc, bkpt)) 352 if (probe_kernel_address((unsigned *)pc, bkpt))
351 return 0; 353 return 0;
352 354
353 return bkpt == BUG_INSTR_VALUE; 355 return bkpt == insn;
354} 356}
355 357
356#endif 358#endif