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1#ifndef _ASM_POWERPC_BUG_H
2#define _ASM_POWERPC_BUG_H
3#ifdef __KERNEL__
4
5#include <asm/asm-compat.h>
6
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
15#ifdef CONFIG_BUG
16
17#ifdef __ASSEMBLY__
18#include <asm/asm-offsets.h>
19#ifdef CONFIG_DEBUG_BUGVERBOSE
20.macro EMIT_BUG_ENTRY addr,file,line,flags
21 .section __bug_table,"a"
225001: PPC_LONG \addr, 5002f
23 .short \line, \flags
24 .org 5001b+BUG_ENTRY_SIZE
25 .previous
26 .section .rodata,"a"
275002: .asciz "\file"
28 .previous
29.endm
30#else
31.macro EMIT_BUG_ENTRY addr,file,line,flags
32 .section __bug_table,"a"
335001: PPC_LONG \addr
34 .short \flags
35 .org 5001b+BUG_ENTRY_SIZE
36 .previous
37.endm
38#endif /* verbose */
39
40#else /* !__ASSEMBLY__ */
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
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
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 unreachable(); \
72} while (0)
73
74#define BUG_ON(x) do { \
75 if (__builtin_constant_p(x)) { \
76 if (x) \
77 BUG(); \
78 } else { \
79 __asm__ __volatile__( \
80 "1: "PPC_TLNEI" %4,0\n" \
81 _EMIT_BUG_ENTRY \
82 : : "i" (__FILE__), "i" (__LINE__), "i" (0), \
83 "i" (sizeof(struct bug_entry)), \
84 "r" ((__force long)(x))); \
85 } \
86} while (0)
87
88#define __WARN_TAINT(taint) do { \
89 __asm__ __volatile__( \
90 "1: twi 31,0,0\n" \
91 _EMIT_BUG_ENTRY \
92 : : "i" (__FILE__), "i" (__LINE__), \
93 "i" (BUGFLAG_TAINT(taint)), \
94 "i" (sizeof(struct bug_entry))); \
95} while (0)
96
97#define WARN_ON(x) ({ \
98 int __ret_warn_on = !!(x); \
99 if (__builtin_constant_p(__ret_warn_on)) { \
100 if (__ret_warn_on) \
101 __WARN(); \
102 } else { \
103 __asm__ __volatile__( \
104 "1: "PPC_TLNEI" %4,0\n" \
105 _EMIT_BUG_ENTRY \
106 : : "i" (__FILE__), "i" (__LINE__), \
107 "i" (BUGFLAG_TAINT(TAINT_WARN)), \
108 "i" (sizeof(struct bug_entry)), \
109 "r" (__ret_warn_on)); \
110 } \
111 unlikely(__ret_warn_on); \
112})
113
114#define HAVE_ARCH_BUG
115#define HAVE_ARCH_BUG_ON
116#define HAVE_ARCH_WARN_ON
117#endif /* __ASSEMBLY __ */
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
125#endif /* CONFIG_BUG */
126
127#include <asm-generic/bug.h>
128
129#ifndef __ASSEMBLY__
130
131struct pt_regs;
132extern int do_page_fault(struct pt_regs *, unsigned long, unsigned long);
133extern void bad_page_fault(struct pt_regs *, unsigned long, int);
134extern void _exception(int, struct pt_regs *, int, unsigned long);
135extern void die(const char *, struct pt_regs *, long);
136
137#endif /* !__ASSEMBLY__ */
138
139#endif /* __KERNEL__ */
140#endif /* _ASM_POWERPC_BUG_H */
1#ifndef _ASM_POWERPC_BUG_H
2#define _ASM_POWERPC_BUG_H
3#ifdef __KERNEL__
4
5#include <asm/asm-compat.h>
6
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
15#ifdef CONFIG_BUG
16
17#ifdef __ASSEMBLY__
18#include <asm/asm-offsets.h>
19#ifdef CONFIG_DEBUG_BUGVERBOSE
20.macro EMIT_BUG_ENTRY addr,file,line,flags
21 .section __bug_table,"a"
225001: PPC_LONG \addr, 5002f
23 .short \line, \flags
24 .org 5001b+BUG_ENTRY_SIZE
25 .previous
26 .section .rodata,"a"
275002: .asciz "\file"
28 .previous
29.endm
30#else
31.macro EMIT_BUG_ENTRY addr,file,line,flags
32 .section __bug_table,"a"
335001: PPC_LONG \addr
34 .short \flags
35 .org 5001b+BUG_ENTRY_SIZE
36 .previous
37.endm
38#endif /* verbose */
39
40#else /* !__ASSEMBLY__ */
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
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
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 unreachable(); \
72} while (0)
73
74#define BUG_ON(x) do { \
75 if (__builtin_constant_p(x)) { \
76 if (x) \
77 BUG(); \
78 } else { \
79 __asm__ __volatile__( \
80 "1: "PPC_TLNEI" %4,0\n" \
81 _EMIT_BUG_ENTRY \
82 : : "i" (__FILE__), "i" (__LINE__), "i" (0), \
83 "i" (sizeof(struct bug_entry)), \
84 "r" ((__force long)(x))); \
85 } \
86} while (0)
87
88#define __WARN_TAINT(taint) do { \
89 __asm__ __volatile__( \
90 "1: twi 31,0,0\n" \
91 _EMIT_BUG_ENTRY \
92 : : "i" (__FILE__), "i" (__LINE__), \
93 "i" (BUGFLAG_TAINT(taint)), \
94 "i" (sizeof(struct bug_entry))); \
95} while (0)
96
97#define WARN_ON(x) ({ \
98 int __ret_warn_on = !!(x); \
99 if (__builtin_constant_p(__ret_warn_on)) { \
100 if (__ret_warn_on) \
101 __WARN(); \
102 } else { \
103 __asm__ __volatile__( \
104 "1: "PPC_TLNEI" %4,0\n" \
105 _EMIT_BUG_ENTRY \
106 : : "i" (__FILE__), "i" (__LINE__), \
107 "i" (BUGFLAG_TAINT(TAINT_WARN)), \
108 "i" (sizeof(struct bug_entry)), \
109 "r" (__ret_warn_on)); \
110 } \
111 unlikely(__ret_warn_on); \
112})
113
114#define HAVE_ARCH_BUG
115#define HAVE_ARCH_BUG_ON
116#define HAVE_ARCH_WARN_ON
117#endif /* __ASSEMBLY __ */
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
125#endif /* CONFIG_BUG */
126
127#include <asm-generic/bug.h>
128
129#endif /* __KERNEL__ */
130#endif /* _ASM_POWERPC_BUG_H */