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