1 #ifndef _ASMARM_BUG_H 2 #define _ASMARM_BUG_H 3 4 #include <linux/linkage.h> 5 #include <linux/types.h> 6 #include <asm/opcodes.h> 7 8 #ifdef CONFIG_BUG 9 10 /* 11 * Use a suitable undefined instruction to use for ARM/Thumb2 bug handling. 12 * We need to be careful not to conflict with those used by other modules and 13 * the register_undef_hook() system. 14 */ 15 #ifdef CONFIG_THUMB2_KERNEL 16 #define BUG_INSTR_VALUE 0xde02 17 #define BUG_INSTR(__value) __inst_thumb16(__value) 18 #else 19 #define BUG_INSTR_VALUE 0xe7f001f2 20 #define BUG_INSTR(__value) __inst_arm(__value) 21 #endif 22 23 24 #define BUG() _BUG(__FILE__, __LINE__, BUG_INSTR_VALUE) 25 #define _BUG(file, line, value) __BUG(file, line, value) 26 27 #ifdef CONFIG_DEBUG_BUGVERBOSE 28 29 /* 30 * The extra indirection is to ensure that the __FILE__ string comes through 31 * OK. Many version of gcc do not support the asm %c parameter which would be 32 * preferable to this unpleasantness. We use mergeable string sections to 33 * avoid multiple copies of the string appearing in the kernel image. 34 */ 35 36 #define __BUG(__file, __line, __value) \ 37 do { \ 38 asm volatile("1:\t" BUG_INSTR(__value) "\n" \ 39 ".pushsection .rodata.str, \"aMS\", %progbits, 1\n" \ 40 "2:\t.asciz " #__file "\n" \ 41 ".popsection\n" \ 42 ".pushsection __bug_table,\"a\"\n" \ 43 ".align 2\n" \ 44 "3:\t.word 1b, 2b\n" \ 45 "\t.hword " #__line ", 0\n" \ 46 ".popsection"); \ 47 unreachable(); \ 48 } while (0) 49 50 #else /* not CONFIG_DEBUG_BUGVERBOSE */ 51 52 #define __BUG(__file, __line, __value) \ 53 do { \ 54 asm volatile(BUG_INSTR(__value) "\n"); \ 55 unreachable(); \ 56 } while (0) 57 #endif /* CONFIG_DEBUG_BUGVERBOSE */ 58 59 #define HAVE_ARCH_BUG 60 #endif /* CONFIG_BUG */ 61 62 #include <asm-generic/bug.h> 63 64 struct pt_regs; 65 void die(const char *msg, struct pt_regs *regs, int err); 66 67 struct siginfo; 68 void arm_notify_die(const char *str, struct pt_regs *regs, struct siginfo *info, 69 unsigned long err, unsigned long trap); 70 71 #ifdef CONFIG_ARM_LPAE 72 #define FAULT_CODE_ALIGNMENT 33 73 #define FAULT_CODE_DEBUG 34 74 #else 75 #define FAULT_CODE_ALIGNMENT 1 76 #define FAULT_CODE_DEBUG 2 77 #endif 78 79 void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int, 80 struct pt_regs *), 81 int sig, int code, const char *name); 82 83 void hook_ifault_code(int nr, int (*fn)(unsigned long, unsigned int, 84 struct pt_regs *), 85 int sig, int code, const char *name); 86 87 extern asmlinkage void c_backtrace(unsigned long fp, int pmode); 88 89 struct mm_struct; 90 extern void show_pte(struct mm_struct *mm, unsigned long addr); 91 extern void __show_regs(struct pt_regs *); 92 93 #endif 94