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Ingo Molnar82da3ff2008-04-17 20:05:37 +02001#ifndef _ASM_KGDB_H_
2#define _ASM_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#else /* ! CONFIG_X86_32 */
43enum regnames {
44 GDB_AX, /* 0 */
45 GDB_DX, /* 1 */
46 GDB_CX, /* 2 */
47 GDB_BX, /* 3 */
48 GDB_SI, /* 4 */
49 GDB_DI, /* 5 */
50 GDB_BP, /* 6 */
51 GDB_SP, /* 7 */
52 GDB_R8, /* 8 */
53 GDB_R9, /* 9 */
54 GDB_R10, /* 10 */
55 GDB_R11, /* 11 */
56 GDB_R12, /* 12 */
57 GDB_R13, /* 13 */
58 GDB_R14, /* 14 */
59 GDB_R15, /* 15 */
60 GDB_PC, /* 16 */
61 GDB_PS, /* 17 */
62};
63#endif /* CONFIG_X86_32 */
64
65/*
66 * Number of bytes of registers:
67 */
68#ifdef CONFIG_X86_32
69# define NUMREGBYTES 64
70#else
71# define NUMREGBYTES ((GDB_PS+1)*8)
72#endif
73
74static inline void arch_kgdb_breakpoint(void)
75{
76 asm(" int $3");
77}
78#define BREAK_INSTR_SIZE 1
79#define CACHE_FLUSH_IS_SAFE 1
80
81#endif /* _ASM_KGDB_H_ */