xref: /linux/arch/x86/include/asm/kgdb.h (revision e5c86679d5e864947a52fb31e45a425dea3e7fa9)
1 #ifndef _ASM_X86_KGDB_H
2 #define _ASM_X86_KGDB_H
3 
4 /*
5  * Copyright (C) 2001-2004 Amit S. Kale
6  * Copyright (C) 2008 Wind River Systems, Inc.
7  */
8 
9 #include <asm/ptrace.h>
10 
11 /*
12  * BUFMAX defines the maximum number of characters in inbound/outbound
13  * buffers at least NUMREGBYTES*2 are needed for register packets
14  * Longer buffer is needed to list all threads
15  */
16 #define BUFMAX			1024
17 
18 /*
19  *  Note that this register image is in a different order than
20  *  the register image that Linux produces at interrupt time.
21  *
22  *  Linux's register image is defined by struct pt_regs in ptrace.h.
23  *  Just why GDB uses a different order is a historical mystery.
24  */
25 #ifdef CONFIG_X86_32
26 enum regnames {
27 	GDB_AX,			/* 0 */
28 	GDB_CX,			/* 1 */
29 	GDB_DX,			/* 2 */
30 	GDB_BX,			/* 3 */
31 	GDB_SP,			/* 4 */
32 	GDB_BP,			/* 5 */
33 	GDB_SI,			/* 6 */
34 	GDB_DI,			/* 7 */
35 	GDB_PC,			/* 8 also known as eip */
36 	GDB_PS,			/* 9 also known as eflags */
37 	GDB_CS,			/* 10 */
38 	GDB_SS,			/* 11 */
39 	GDB_DS,			/* 12 */
40 	GDB_ES,			/* 13 */
41 	GDB_FS,			/* 14 */
42 	GDB_GS,			/* 15 */
43 };
44 #define GDB_ORIG_AX		41
45 #define DBG_MAX_REG_NUM		16
46 #define NUMREGBYTES		((GDB_GS+1)*4)
47 #else /* ! CONFIG_X86_32 */
48 enum regnames {
49 	GDB_AX,			/* 0 */
50 	GDB_BX,			/* 1 */
51 	GDB_CX,			/* 2 */
52 	GDB_DX,			/* 3 */
53 	GDB_SI,			/* 4 */
54 	GDB_DI,			/* 5 */
55 	GDB_BP,			/* 6 */
56 	GDB_SP,			/* 7 */
57 	GDB_R8,			/* 8 */
58 	GDB_R9,			/* 9 */
59 	GDB_R10,		/* 10 */
60 	GDB_R11,		/* 11 */
61 	GDB_R12,		/* 12 */
62 	GDB_R13,		/* 13 */
63 	GDB_R14,		/* 14 */
64 	GDB_R15,		/* 15 */
65 	GDB_PC,			/* 16 */
66 	GDB_PS,			/* 17 */
67 	GDB_CS,			/* 18 */
68 	GDB_SS,			/* 19 */
69 	GDB_DS,			/* 20 */
70 	GDB_ES,			/* 21 */
71 	GDB_FS,			/* 22 */
72 	GDB_GS,			/* 23 */
73 };
74 #define GDB_ORIG_AX		57
75 #define DBG_MAX_REG_NUM		24
76 /* 17 64 bit regs and 5 32 bit regs */
77 #define NUMREGBYTES		((17 * 8) + (5 * 4))
78 #endif /* ! CONFIG_X86_32 */
79 
80 static inline void arch_kgdb_breakpoint(void)
81 {
82 	asm("   int $3");
83 }
84 #define BREAK_INSTR_SIZE	1
85 #define CACHE_FLUSH_IS_SAFE	1
86 #define GDB_ADJUSTS_BREAK_OFFSET
87 
88 extern int kgdb_ll_trap(int cmd, const char *str,
89 			struct pt_regs *regs, long err, int trap, int sig);
90 
91 #endif /* _ASM_X86_KGDB_H */
92