1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _ASM_X86_KGDB_H
3*4882a593Smuzhiyun #define _ASM_X86_KGDB_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun /*
6*4882a593Smuzhiyun * Copyright (C) 2001-2004 Amit S. Kale
7*4882a593Smuzhiyun * Copyright (C) 2008 Wind River Systems, Inc.
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <asm/ptrace.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun /*
13*4882a593Smuzhiyun * BUFMAX defines the maximum number of characters in inbound/outbound
14*4882a593Smuzhiyun * buffers at least NUMREGBYTES*2 are needed for register packets
15*4882a593Smuzhiyun * Longer buffer is needed to list all threads
16*4882a593Smuzhiyun */
17*4882a593Smuzhiyun #define BUFMAX 1024
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /*
20*4882a593Smuzhiyun * Note that this register image is in a different order than
21*4882a593Smuzhiyun * the register image that Linux produces at interrupt time.
22*4882a593Smuzhiyun *
23*4882a593Smuzhiyun * Linux's register image is defined by struct pt_regs in ptrace.h.
24*4882a593Smuzhiyun * Just why GDB uses a different order is a historical mystery.
25*4882a593Smuzhiyun */
26*4882a593Smuzhiyun #ifdef CONFIG_X86_32
27*4882a593Smuzhiyun enum regnames {
28*4882a593Smuzhiyun GDB_AX, /* 0 */
29*4882a593Smuzhiyun GDB_CX, /* 1 */
30*4882a593Smuzhiyun GDB_DX, /* 2 */
31*4882a593Smuzhiyun GDB_BX, /* 3 */
32*4882a593Smuzhiyun GDB_SP, /* 4 */
33*4882a593Smuzhiyun GDB_BP, /* 5 */
34*4882a593Smuzhiyun GDB_SI, /* 6 */
35*4882a593Smuzhiyun GDB_DI, /* 7 */
36*4882a593Smuzhiyun GDB_PC, /* 8 also known as eip */
37*4882a593Smuzhiyun GDB_PS, /* 9 also known as eflags */
38*4882a593Smuzhiyun GDB_CS, /* 10 */
39*4882a593Smuzhiyun GDB_SS, /* 11 */
40*4882a593Smuzhiyun GDB_DS, /* 12 */
41*4882a593Smuzhiyun GDB_ES, /* 13 */
42*4882a593Smuzhiyun GDB_FS, /* 14 */
43*4882a593Smuzhiyun GDB_GS, /* 15 */
44*4882a593Smuzhiyun };
45*4882a593Smuzhiyun #define GDB_ORIG_AX 41
46*4882a593Smuzhiyun #define DBG_MAX_REG_NUM 16
47*4882a593Smuzhiyun #define NUMREGBYTES ((GDB_GS+1)*4)
48*4882a593Smuzhiyun #else /* ! CONFIG_X86_32 */
49*4882a593Smuzhiyun enum regnames {
50*4882a593Smuzhiyun GDB_AX, /* 0 */
51*4882a593Smuzhiyun GDB_BX, /* 1 */
52*4882a593Smuzhiyun GDB_CX, /* 2 */
53*4882a593Smuzhiyun GDB_DX, /* 3 */
54*4882a593Smuzhiyun GDB_SI, /* 4 */
55*4882a593Smuzhiyun GDB_DI, /* 5 */
56*4882a593Smuzhiyun GDB_BP, /* 6 */
57*4882a593Smuzhiyun GDB_SP, /* 7 */
58*4882a593Smuzhiyun GDB_R8, /* 8 */
59*4882a593Smuzhiyun GDB_R9, /* 9 */
60*4882a593Smuzhiyun GDB_R10, /* 10 */
61*4882a593Smuzhiyun GDB_R11, /* 11 */
62*4882a593Smuzhiyun GDB_R12, /* 12 */
63*4882a593Smuzhiyun GDB_R13, /* 13 */
64*4882a593Smuzhiyun GDB_R14, /* 14 */
65*4882a593Smuzhiyun GDB_R15, /* 15 */
66*4882a593Smuzhiyun GDB_PC, /* 16 */
67*4882a593Smuzhiyun GDB_PS, /* 17 */
68*4882a593Smuzhiyun GDB_CS, /* 18 */
69*4882a593Smuzhiyun GDB_SS, /* 19 */
70*4882a593Smuzhiyun GDB_DS, /* 20 */
71*4882a593Smuzhiyun GDB_ES, /* 21 */
72*4882a593Smuzhiyun GDB_FS, /* 22 */
73*4882a593Smuzhiyun GDB_GS, /* 23 */
74*4882a593Smuzhiyun };
75*4882a593Smuzhiyun #define GDB_ORIG_AX 57
76*4882a593Smuzhiyun #define DBG_MAX_REG_NUM 24
77*4882a593Smuzhiyun /* 17 64 bit regs and 5 32 bit regs */
78*4882a593Smuzhiyun #define NUMREGBYTES ((17 * 8) + (5 * 4))
79*4882a593Smuzhiyun #endif /* ! CONFIG_X86_32 */
80*4882a593Smuzhiyun
arch_kgdb_breakpoint(void)81*4882a593Smuzhiyun static inline void arch_kgdb_breakpoint(void)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun asm(" int $3");
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun #define BREAK_INSTR_SIZE 1
86*4882a593Smuzhiyun #define CACHE_FLUSH_IS_SAFE 1
87*4882a593Smuzhiyun #define GDB_ADJUSTS_BREAK_OFFSET
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun extern int kgdb_ll_trap(int cmd, const char *str,
90*4882a593Smuzhiyun struct pt_regs *regs, long err, int trap, int sig);
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun #endif /* _ASM_X86_KGDB_H */
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