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

 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)				\
37do {								\
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		"3:\t.word 1b, 2b\n"				\
44		"\t.hword " #__line ", 0\n"			\
45		".popsection");					\
46	unreachable();						\
47} while (0)
48
49#else  /* not CONFIG_DEBUG_BUGVERBOSE */
50
51#define __BUG(__file, __line, __value)				\
52do {								\
53	asm volatile(BUG_INSTR(__value) "\n");			\
54	unreachable();						\
55} while (0)
56#endif  /* CONFIG_DEBUG_BUGVERBOSE */
57
58#define HAVE_ARCH_BUG
59#endif  /* CONFIG_BUG */
60
61#include <asm-generic/bug.h>
62
63struct pt_regs;
64void die(const char *msg, struct pt_regs *regs, int err);
65
66struct siginfo;
67void arm_notify_die(const char *str, struct pt_regs *regs, struct siginfo *info,
68		unsigned long err, unsigned long trap);
69
70#ifdef CONFIG_ARM_LPAE
71#define FAULT_CODE_ALIGNMENT	33
72#define FAULT_CODE_DEBUG	34
73#else
74#define FAULT_CODE_ALIGNMENT	1
75#define FAULT_CODE_DEBUG	2
76#endif
77
78void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
79				       struct pt_regs *),
80		     int sig, int code, const char *name);
81
82void hook_ifault_code(int nr, int (*fn)(unsigned long, unsigned int,
83				       struct pt_regs *),
84		     int sig, int code, const char *name);
85
86extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
87
88struct mm_struct;
89extern void show_pte(struct mm_struct *mm, unsigned long addr);
90extern void __show_regs(struct pt_regs *);
91
92#endif