4 #include <linux/linkage.h>
5 #include <linux/types.h>
6 #include <asm/opcodes.h>
9 * Use a suitable undefined instruction to use for ARM/Thumb2 bug handling.
10 * We need to be careful not to conflict with those used by other modules and
11 * the register_undef_hook() system.
13 #ifdef CONFIG_THUMB2_KERNEL
14 #define BUG_INSTR_VALUE 0xde02
15 #define BUG_INSTR(__value) __inst_thumb16(__value)
17 #define BUG_INSTR_VALUE 0xe7f001f2
18 #define BUG_INSTR(__value) __inst_arm(__value)
22 #define BUG() _BUG(__FILE__, __LINE__, BUG_INSTR_VALUE)
23 #define _BUG(file, line, value) __BUG(file, line, value)
25 #ifdef CONFIG_DEBUG_BUGVERBOSE
28 * The extra indirection is to ensure that the __FILE__ string comes through
29 * OK. Many version of gcc do not support the asm %c parameter which would be
30 * preferable to this unpleasantness. We use mergeable string sections to
31 * avoid multiple copies of the string appearing in the kernel image.
34 #define __BUG(__file, __line, __value) \
36 asm volatile("1:\t" BUG_INSTR(__value) "\n" \
37 ".pushsection .rodata.str, \"aMS\", %progbits, 1\n" \
38 "2:\t.asciz " #__file "\n" \
40 ".pushsection __bug_table,\"a\"\n" \
42 "3:\t.word 1b, 2b\n" \
43 "\t.hword " #__line ", 0\n" \
50 #define __BUG(__file, __line, __value) \
52 asm volatile(BUG_INSTR(__value) "\n"); \
55 #endif /* CONFIG_DEBUG_BUGVERBOSE */
59 #include <asm-generic/bug.h>
62 void die(const char *msg, struct pt_regs *regs, int err);
65 void arm_notify_die(const char *str, struct pt_regs *regs, struct siginfo *info,
66 unsigned long err, unsigned long trap);
68 #ifdef CONFIG_ARM_LPAE
69 #define FAULT_CODE_ALIGNMENT 33
70 #define FAULT_CODE_DEBUG 34
72 #define FAULT_CODE_ALIGNMENT 1
73 #define FAULT_CODE_DEBUG 2
76 void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
78 int sig, int code, const char *name);
80 void hook_ifault_code(int nr, int (*fn)(unsigned long, unsigned int,
82 int sig, int code, const char *name);
84 extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
87 extern void show_pte(struct mm_struct *mm, unsigned long addr);
88 extern void __show_regs(struct pt_regs *);