1 /*
2 * Copyright 2003 PathScale, Inc.
3 * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 *
5 * Licensed under the GPL
6 */
7
8 #ifndef __SYSDEP_X86_64_PTRACE_H
9 #define __SYSDEP_X86_64_PTRACE_H
10
11 #include <generated/user_constants.h>
12 #include "sysdep/faultinfo.h"
13
14 #define MAX_REG_OFFSET (UM_FRAME_SIZE)
15 #define MAX_REG_NR ((MAX_REG_OFFSET) / sizeof(unsigned long))
16
17 #define REGS_IP(r) ((r)[HOST_IP])
18 #define REGS_SP(r) ((r)[HOST_SP])
19
20 #define REGS_RBX(r) ((r)[HOST_BX])
21 #define REGS_RCX(r) ((r)[HOST_CX])
22 #define REGS_RDX(r) ((r)[HOST_DX])
23 #define REGS_RSI(r) ((r)[HOST_SI])
24 #define REGS_RDI(r) ((r)[HOST_DI])
25 #define REGS_RBP(r) ((r)[HOST_BP])
26 #define REGS_RAX(r) ((r)[HOST_AX])
27 #define REGS_R8(r) ((r)[HOST_R8])
28 #define REGS_R9(r) ((r)[HOST_R9])
29 #define REGS_R10(r) ((r)[HOST_R10])
30 #define REGS_R11(r) ((r)[HOST_R11])
31 #define REGS_R12(r) ((r)[HOST_R12])
32 #define REGS_R13(r) ((r)[HOST_R13])
33 #define REGS_R14(r) ((r)[HOST_R14])
34 #define REGS_R15(r) ((r)[HOST_R15])
35 #define REGS_CS(r) ((r)[HOST_CS])
36 #define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
37 #define REGS_SS(r) ((r)[HOST_SS])
38
39 #define HOST_FS_BASE 21
40 #define HOST_GS_BASE 22
41 #define HOST_DS 23
42 #define HOST_ES 24
43 #define HOST_FS 25
44 #define HOST_GS 26
45
46 /* Also defined in asm/ptrace-x86_64.h, but not in libc headers. So, these
47 * are already defined for kernel code, but not for userspace code.
48 */
49 #ifndef FS_BASE
50 /* These aren't defined in ptrace.h, but exist in struct user_regs_struct,
51 * which is what x86_64 ptrace actually uses.
52 */
53 #define FS_BASE (HOST_FS_BASE * sizeof(long))
54 #define GS_BASE (HOST_GS_BASE * sizeof(long))
55 #define DS (HOST_DS * sizeof(long))
56 #define ES (HOST_ES * sizeof(long))
57 #define FS (HOST_FS * sizeof(long))
58 #define GS (HOST_GS * sizeof(long))
59 #endif
60
61 #define REGS_FS_BASE(r) ((r)[HOST_FS_BASE])
62 #define REGS_GS_BASE(r) ((r)[HOST_GS_BASE])
63 #define REGS_DS(r) ((r)[HOST_DS])
64 #define REGS_ES(r) ((r)[HOST_ES])
65 #define REGS_FS(r) ((r)[HOST_FS])
66 #define REGS_GS(r) ((r)[HOST_GS])
67
68 #define REGS_ORIG_RAX(r) ((r)[HOST_ORIG_AX])
69
70 #define REGS_SET_SYSCALL_RETURN(r, res) REGS_RAX(r) = (res)
71
72 #define IP_RESTART_SYSCALL(ip) ((ip) -= 2)
73 #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
74
75 #define REGS_FAULT_ADDR(r) ((r)->fault_addr)
76
77 #define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type)
78
79 #define REGS_TRAP(r) ((r)->trap_type)
80
81 #define REGS_ERR(r) ((r)->fault_type)
82
83 struct uml_pt_regs {
84 unsigned long gp[MAX_REG_NR];
85 unsigned long fp[HOST_FP_SIZE];
86 struct faultinfo faultinfo;
87 long syscall;
88 int is_user;
89 };
90
91 #define EMPTY_UML_PT_REGS { }
92
93 #define UPT_RBX(r) REGS_RBX((r)->gp)
94 #define UPT_RCX(r) REGS_RCX((r)->gp)
95 #define UPT_RDX(r) REGS_RDX((r)->gp)
96 #define UPT_RSI(r) REGS_RSI((r)->gp)
97 #define UPT_RDI(r) REGS_RDI((r)->gp)
98 #define UPT_RBP(r) REGS_RBP((r)->gp)
99 #define UPT_RAX(r) REGS_RAX((r)->gp)
100 #define UPT_R8(r) REGS_R8((r)->gp)
101 #define UPT_R9(r) REGS_R9((r)->gp)
102 #define UPT_R10(r) REGS_R10((r)->gp)
103 #define UPT_R11(r) REGS_R11((r)->gp)
104 #define UPT_R12(r) REGS_R12((r)->gp)
105 #define UPT_R13(r) REGS_R13((r)->gp)
106 #define UPT_R14(r) REGS_R14((r)->gp)
107 #define UPT_R15(r) REGS_R15((r)->gp)
108 #define UPT_CS(r) REGS_CS((r)->gp)
109 #define UPT_FS_BASE(r) REGS_FS_BASE((r)->gp)
110 #define UPT_FS(r) REGS_FS((r)->gp)
111 #define UPT_GS_BASE(r) REGS_GS_BASE((r)->gp)
112 #define UPT_GS(r) REGS_GS((r)->gp)
113 #define UPT_DS(r) REGS_DS((r)->gp)
114 #define UPT_ES(r) REGS_ES((r)->gp)
115 #define UPT_CS(r) REGS_CS((r)->gp)
116 #define UPT_SS(r) REGS_SS((r)->gp)
117 #define UPT_ORIG_RAX(r) REGS_ORIG_RAX((r)->gp)
118
119 #define UPT_IP(r) REGS_IP((r)->gp)
120 #define UPT_SP(r) REGS_SP((r)->gp)
121
122 #define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp)
123 #define UPT_SYSCALL_NR(r) ((r)->syscall)
124 #define UPT_SYSCALL_RET(r) UPT_RAX(r)
125
126 extern int user_context(unsigned long sp);
127
128 #define UPT_IS_USER(r) ((r)->is_user)
129
130 #define UPT_SYSCALL_ARG1(r) UPT_RDI(r)
131 #define UPT_SYSCALL_ARG2(r) UPT_RSI(r)
132 #define UPT_SYSCALL_ARG3(r) UPT_RDX(r)
133 #define UPT_SYSCALL_ARG4(r) UPT_R10(r)
134 #define UPT_SYSCALL_ARG5(r) UPT_R8(r)
135 #define UPT_SYSCALL_ARG6(r) UPT_R9(r)
136
137 struct syscall_args {
138 unsigned long args[6];
139 };
140
141 #define SYSCALL_ARGS(r) ((struct syscall_args) \
142 { .args = { UPT_SYSCALL_ARG1(r), \
143 UPT_SYSCALL_ARG2(r), \
144 UPT_SYSCALL_ARG3(r), \
145 UPT_SYSCALL_ARG4(r), \
146 UPT_SYSCALL_ARG5(r), \
147 UPT_SYSCALL_ARG6(r) } } )
148
149 #define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->gp)
150
151 #define UPT_FAULTINFO(r) (&(r)->faultinfo)
152
arch_init_registers(int pid)153 static inline void arch_init_registers(int pid)
154 {
155 }
156
157 #endif
158