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