1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_KGDB_H
3 #define _ASM_X86_KGDB_H
4
5 /*
6 * Copyright (C) 2001-2004 Amit S. Kale
7 * Copyright (C) 2008 Wind River Systems, Inc.
8 */
9
10 #include <asm/ptrace.h>
11
12 /*
13 * BUFMAX defines the maximum number of characters in inbound/outbound
14 * buffers at least NUMREGBYTES*2 are needed for register packets
15 * Longer buffer is needed to list all threads
16 */
17 #define BUFMAX 1024
18
19 /*
20 * Note that this register image is in a different order than
21 * the register image that Linux produces at interrupt time.
22 *
23 * Linux's register image is defined by struct pt_regs in ptrace.h.
24 * Just why GDB uses a different order is a historical mystery.
25 */
26 #ifdef CONFIG_X86_32
27 enum regnames {
28 GDB_AX, /* 0 */
29 GDB_CX, /* 1 */
30 GDB_DX, /* 2 */
31 GDB_BX, /* 3 */
32 GDB_SP, /* 4 */
33 GDB_BP, /* 5 */
34 GDB_SI, /* 6 */
35 GDB_DI, /* 7 */
36 GDB_PC, /* 8 also known as eip */
37 GDB_PS, /* 9 also known as eflags */
38 GDB_CS, /* 10 */
39 GDB_SS, /* 11 */
40 GDB_DS, /* 12 */
41 GDB_ES, /* 13 */
42 GDB_FS, /* 14 */
43 GDB_GS, /* 15 */
44 };
45 #define GDB_ORIG_AX 41
46 #define DBG_MAX_REG_NUM 16
47 #define NUMREGBYTES ((GDB_GS+1)*4)
48 #else /* ! CONFIG_X86_32 */
49 enum regnames {
50 GDB_AX, /* 0 */
51 GDB_BX, /* 1 */
52 GDB_CX, /* 2 */
53 GDB_DX, /* 3 */
54 GDB_SI, /* 4 */
55 GDB_DI, /* 5 */
56 GDB_BP, /* 6 */
57 GDB_SP, /* 7 */
58 GDB_R8, /* 8 */
59 GDB_R9, /* 9 */
60 GDB_R10, /* 10 */
61 GDB_R11, /* 11 */
62 GDB_R12, /* 12 */
63 GDB_R13, /* 13 */
64 GDB_R14, /* 14 */
65 GDB_R15, /* 15 */
66 GDB_PC, /* 16 */
67 GDB_PS, /* 17 */
68 GDB_CS, /* 18 */
69 GDB_SS, /* 19 */
70 GDB_DS, /* 20 */
71 GDB_ES, /* 21 */
72 GDB_FS, /* 22 */
73 GDB_GS, /* 23 */
74 };
75 #define GDB_ORIG_AX 57
76 #define DBG_MAX_REG_NUM 24
77 /* 17 64 bit regs and 5 32 bit regs */
78 #define NUMREGBYTES ((17 * 8) + (5 * 4))
79 #endif /* ! CONFIG_X86_32 */
80
81 static inline void arch_kgdb_breakpoint(void)
82 {
83 asm(" int $3");
84 }
85 #define BREAK_INSTR_SIZE 1
86 #define CACHE_FLUSH_IS_SAFE 1
87 #define GDB_ADJUSTS_BREAK_OFFSET
88
89 extern int kgdb_ll_trap(int cmd, const char *str,
90 struct pt_regs *regs, long err, int trap, int sig);
91
92 #endif /* _ASM_X86_KGDB_H */