projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef __ASM_SH_BUG_H |
| 2 | #define __ASM_SH_BUG_H | |
| 3 | ||
| e839ca52 DH |
4 | #include <linux/linkage.h> |
| 5 | ||
| 44530c69 | 6 | #define TRAPA_BUG_OPCODE 0xc33e /* trapa #0x3e */ |
| e115f2c1 | 7 | #define BUGFLAG_UNWINDER (1 << 1) |
| 44530c69 | 8 | |
| e1cd93ea | 9 | #ifdef CONFIG_GENERIC_BUG |
| fa691511 PM |
10 | #define HAVE_ARCH_BUG |
| 11 | #define HAVE_ARCH_WARN_ON | |
| dc34d312 | 12 | |
| fa691511 PM |
13 | /** |
| 14 | * _EMIT_BUG_ENTRY | |
| 15 | * %1 - __FILE__ | |
| 16 | * %2 - __LINE__ | |
| 17 | * %3 - trap type | |
| 18 | * %4 - sizeof(struct bug_entry) | |
| 19 | * | |
| 20 | * The trapa opcode itself sits in %0. | |
| 21 | * The %O notation is used to avoid # generation. | |
| 22 | * | |
| 23 | * The offending file and line are encoded in the __bug_table section. | |
| 24 | */ | |
| dc34d312 | 25 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
| fa691511 | 26 | #define _EMIT_BUG_ENTRY \ |
| 325cdacd | 27 | "\t.pushsection __bug_table,\"aw\"\n" \ |
| fa691511 PM |
28 | "2:\t.long 1b, %O1\n" \ |
| 29 | "\t.short %O2, %O3\n" \ | |
| 30 | "\t.org 2b+%O4\n" \ | |
| 31 | "\t.popsection\n" | |
| 32 | #else | |
| 33 | #define _EMIT_BUG_ENTRY \ | |
| 325cdacd | 34 | "\t.pushsection __bug_table,\"aw\"\n" \ |
| fa691511 PM |
35 | "2:\t.long 1b\n" \ |
| 36 | "\t.short %O3\n" \ | |
| 37 | "\t.org 2b+%O4\n" \ | |
| 38 | "\t.popsection\n" | |
| 39 | #endif | |
| dc34d312 PM |
40 | |
| 41 | #define BUG() \ | |
| 42 | do { \ | |
| 43 | __asm__ __volatile__ ( \ | |
| fa691511 PM |
44 | "1:\t.short %O0\n" \ |
| 45 | _EMIT_BUG_ENTRY \ | |
| 46 | : \ | |
| 47 | : "n" (TRAPA_BUG_OPCODE), \ | |
| 48 | "i" (__FILE__), \ | |
| 49 | "i" (__LINE__), "i" (0), \ | |
| 50 | "i" (sizeof(struct bug_entry))); \ | |
| 579e1452 | 51 | unreachable(); \ |
| dc34d312 PM |
52 | } while (0) |
| 53 | ||
| 19d43626 | 54 | #define __WARN_FLAGS(flags) \ |
| fa691511 PM |
55 | do { \ |
| 56 | __asm__ __volatile__ ( \ | |
| 57 | "1:\t.short %O0\n" \ | |
| 58 | _EMIT_BUG_ENTRY \ | |
| 59 | : \ | |
| 60 | : "n" (TRAPA_BUG_OPCODE), \ | |
| 61 | "i" (__FILE__), \ | |
| 62 | "i" (__LINE__), \ | |
| 19d43626 | 63 | "i" (BUGFLAG_WARNING|(flags)), \ |
| fa691511 | 64 | "i" (sizeof(struct bug_entry))); \ |
| 1da177e4 LT |
65 | } while (0) |
| 66 | ||
| fa691511 | 67 | #define WARN_ON(x) ({ \ |
| fd0cbdd3 | 68 | int __ret_warn_on = !!(x); \ |
| fa691511 PM |
69 | if (__builtin_constant_p(__ret_warn_on)) { \ |
| 70 | if (__ret_warn_on) \ | |
| 71 | __WARN(); \ | |
| 72 | } else { \ | |
| 73 | if (unlikely(__ret_warn_on)) \ | |
| 74 | __WARN(); \ | |
| 75 | } \ | |
| 76 | unlikely(__ret_warn_on); \ | |
| 77 | }) | |
| dc34d312 | 78 | |
| e115f2c1 | 79 | #define UNWINDER_BUG() \ |
| b344e24a MF |
80 | do { \ |
| 81 | __asm__ __volatile__ ( \ | |
| 82 | "1:\t.short %O0\n" \ | |
| e115f2c1 | 83 | _EMIT_BUG_ENTRY \ |
| b344e24a | 84 | : \ |
| e115f2c1 | 85 | : "n" (TRAPA_BUG_OPCODE), \ |
| b344e24a | 86 | "i" (__FILE__), \ |
| e115f2c1 PM |
87 | "i" (__LINE__), \ |
| 88 | "i" (BUGFLAG_UNWINDER), \ | |
| b344e24a MF |
89 | "i" (sizeof(struct bug_entry))); \ |
| 90 | } while (0) | |
| 91 | ||
| 92 | #define UNWINDER_BUG_ON(x) ({ \ | |
| 93 | int __ret_unwinder_on = !!(x); \ | |
| 94 | if (__builtin_constant_p(__ret_unwinder_on)) { \ | |
| 95 | if (__ret_unwinder_on) \ | |
| 96 | UNWINDER_BUG(); \ | |
| 97 | } else { \ | |
| 98 | if (unlikely(__ret_unwinder_on)) \ | |
| 99 | UNWINDER_BUG(); \ | |
| 100 | } \ | |
| 101 | unlikely(__ret_unwinder_on); \ | |
| 102 | }) | |
| 103 | ||
| 74db2479 PM |
104 | #else |
| 105 | ||
| 106 | #define UNWINDER_BUG BUG | |
| 107 | #define UNWINDER_BUG_ON BUG_ON | |
| 108 | ||
| e1cd93ea | 109 | #endif /* CONFIG_GENERIC_BUG */ |
| c8538a7a | 110 | |
| 1da177e4 LT |
111 | #include <asm-generic/bug.h> |
| 112 | ||
| e839ca52 | 113 | struct pt_regs; |
| 5f857bce PM |
114 | |
| 115 | /* arch/sh/kernel/traps.c */ | |
| e839ca52 | 116 | extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn)); |
| 5f857bce PM |
117 | extern void die_if_kernel(const char *str, struct pt_regs *regs, long err); |
| 118 | extern void die_if_no_fixup(const char *str, struct pt_regs *regs, long err); | |
| e839ca52 | 119 | |
| dc34d312 | 120 | #endif /* __ASM_SH_BUG_H */ |