projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 25433b12 BB |
1 | #ifndef _ASM_POWERPC_BUG_H |
| 2 | #define _ASM_POWERPC_BUG_H | |
| 88ced031 | 3 | #ifdef __KERNEL__ |
| 1da177e4 | 4 | |
| 3ddfbcf1 | 5 | #include <asm/asm-compat.h> |
| a58f053b | 6 | |
| 1da177e4 LT |
7 | /* |
| 8 | * Define an illegal instr to trap on the bug. | |
| 9 | * We don't use 0 because that marks the end of a function | |
| 10 | * in the ELF ABI. That's "Boo Boo" in case you wonder... | |
| 11 | */ | |
| 12 | #define BUG_OPCODE .long 0x00b00b00 /* For asm */ | |
| 13 | #define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */ | |
| 14 | ||
| c8538a7a MM |
15 | #ifdef CONFIG_BUG |
| 16 | ||
| 007d88d0 | 17 | #ifdef __ASSEMBLY__ |
| a58f053b | 18 | #include <asm/asm-offsets.h> |
| 007d88d0 DW |
19 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
| 20 | .macro EMIT_BUG_ENTRY addr,file,line,flags | |
| 21 | .section __bug_table,"a" | |
| 22 | 5001: PPC_LONG \addr, 5002f | |
| 23 | .short \line, \flags | |
| 24 | .org 5001b+BUG_ENTRY_SIZE | |
| 25 | .previous | |
| 26 | .section .rodata,"a" | |
| 27 | 5002: .asciz "\file" | |
| 28 | .previous | |
| 29 | .endm | |
| 30 | #else | |
| a58f053b | 31 | .macro EMIT_BUG_ENTRY addr,file,line,flags |
| 007d88d0 DW |
32 | .section __bug_table,"a" |
| 33 | 5001: PPC_LONG \addr | |
| 34 | .short \flags | |
| 35 | .org 5001b+BUG_ENTRY_SIZE | |
| 36 | .previous | |
| 37 | .endm | |
| 38 | #endif /* verbose */ | |
| 39 | ||
| 40 | #else /* !__ASSEMBLY__ */ | |
| 73c9ceab JF |
41 | /* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3 to be FILE, LINE, flags and |
| 42 | sizeof(struct bug_entry), respectively */ | |
| 43 | #ifdef CONFIG_DEBUG_BUGVERBOSE | |
| 44 | #define _EMIT_BUG_ENTRY \ | |
| 45 | ".section __bug_table,\"a\"\n" \ | |
| 46 | "2:\t" PPC_LONG "1b, %0\n" \ | |
| 47 | "\t.short %1, %2\n" \ | |
| 48 | ".org 2b+%3\n" \ | |
| 49 | ".previous\n" | |
| 50 | #else | |
| 51 | #define _EMIT_BUG_ENTRY \ | |
| 52 | ".section __bug_table,\"a\"\n" \ | |
| 53 | "2:\t" PPC_LONG "1b\n" \ | |
| 54 | "\t.short %2\n" \ | |
| 55 | ".org 2b+%3\n" \ | |
| 56 | ".previous\n" | |
| 57 | #endif | |
| 58 | ||
| e3f94b85 ME |
59 | /* |
| 60 | * BUG_ON() and WARN_ON() do their best to cooperate with compile-time | |
| 61 | * optimisations. However depending on the complexity of the condition | |
| 62 | * some compiler versions may not produce optimal results. | |
| 63 | */ | |
| 64 | ||
| 73c9ceab JF |
65 | #define BUG() do { \ |
| 66 | __asm__ __volatile__( \ | |
| 67 | "1: twi 31,0,0\n" \ | |
| 68 | _EMIT_BUG_ENTRY \ | |
| 69 | : : "i" (__FILE__), "i" (__LINE__), \ | |
| 70 | "i" (0), "i" (sizeof(struct bug_entry))); \ | |
| 71 | for(;;) ; \ | |
| 1da177e4 LT |
72 | } while (0) |
| 73 | ||
| 74 | #define BUG_ON(x) do { \ | |
| e3f94b85 ME |
75 | if (__builtin_constant_p(x)) { \ |
| 76 | if (x) \ | |
| 77 | BUG(); \ | |
| 78 | } else { \ | |
| 79 | __asm__ __volatile__( \ | |
| 73c9ceab JF |
80 | "1: "PPC_TLNEI" %4,0\n" \ |
| 81 | _EMIT_BUG_ENTRY \ | |
| 82 | : : "i" (__FILE__), "i" (__LINE__), "i" (0), \ | |
| 83 | "i" (sizeof(struct bug_entry)), \ | |
| 97f1e7f7 | 84 | "r" ((__force long)(x))); \ |
| e3f94b85 | 85 | } \ |
| 1da177e4 LT |
86 | } while (0) |
| 87 | ||
| 872345b7 | 88 | #define __WARN() do { \ |
| 1da177e4 | 89 | __asm__ __volatile__( \ |
| e3f94b85 | 90 | "1: twi 31,0,0\n" \ |
| 73c9ceab JF |
91 | _EMIT_BUG_ENTRY \ |
| 92 | : : "i" (__FILE__), "i" (__LINE__), \ | |
| 93 | "i" (BUGFLAG_WARNING), \ | |
| 94 | "i" (sizeof(struct bug_entry))); \ | |
| e3f94b85 ME |
95 | } while (0) |
| 96 | ||
| 684f9783 | 97 | #define WARN_ON(x) ({ \ |
| 8d4fbcfb | 98 | int __ret_warn_on = !!(x); \ |
| 684f9783 HX |
99 | if (__builtin_constant_p(__ret_warn_on)) { \ |
| 100 | if (__ret_warn_on) \ | |
| 872345b7 | 101 | __WARN(); \ |
| e3f94b85 ME |
102 | } else { \ |
| 103 | __asm__ __volatile__( \ | |
| 73c9ceab JF |
104 | "1: "PPC_TLNEI" %4,0\n" \ |
| 105 | _EMIT_BUG_ENTRY \ | |
| 106 | : : "i" (__FILE__), "i" (__LINE__), \ | |
| 107 | "i" (BUGFLAG_WARNING), \ | |
| 108 | "i" (sizeof(struct bug_entry)), \ | |
| 109 | "r" (__ret_warn_on)); \ | |
| e3f94b85 | 110 | } \ |
| 684f9783 HX |
111 | unlikely(__ret_warn_on); \ |
| 112 | }) | |
| 1da177e4 | 113 | |
| 1da177e4 LT |
114 | #define HAVE_ARCH_BUG |
| 115 | #define HAVE_ARCH_BUG_ON | |
| 116 | #define HAVE_ARCH_WARN_ON | |
| 25433b12 | 117 | #endif /* __ASSEMBLY __ */ |
| a58f053b BH |
118 | #else |
| 119 | #ifdef __ASSEMBLY__ | |
| 120 | .macro EMIT_BUG_ENTRY addr,file,line,flags | |
| 121 | .endm | |
| 122 | #else /* !__ASSEMBLY__ */ | |
| 123 | #define _EMIT_BUG_ENTRY | |
| 124 | #endif | |
| 007d88d0 | 125 | #endif /* CONFIG_BUG */ |
| c8538a7a | 126 | |
| 1da177e4 LT |
127 | #include <asm-generic/bug.h> |
| 128 | ||
| 88ced031 | 129 | #endif /* __KERNEL__ */ |
| 25433b12 | 130 | #endif /* _ASM_POWERPC_BUG_H */ |