1 /*
2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6 #ifndef __SYSDEP_I386_PTRACE_H
7 #define __SYSDEP_I386_PTRACE_H
8
9 #include "user_constants.h"
10 #include "sysdep/faultinfo.h"
11
12 #define MAX_REG_NR (UM_FRAME_SIZE / sizeof(unsigned long))
13 #define MAX_REG_OFFSET (UM_FRAME_SIZE)
14
15 static inline void update_debugregs(int seq) {}
16
17 /* syscall emulation path in ptrace */
18
19 #ifndef PTRACE_SYSEMU
20 #define PTRACE_SYSEMU 31
21 #endif
22
23 void set_using_sysemu(int value);
24 int get_using_sysemu(void);
25 extern int sysemu_supported;
26
27 #include "skas_ptregs.h"
28
29 #define REGS_IP(r) ((r)[HOST_IP])
30 #define REGS_SP(r) ((r)[HOST_SP])
31 #define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
32 #define REGS_EAX(r) ((r)[HOST_EAX])
33 #define REGS_EBX(r) ((r)[HOST_EBX])
34 #define REGS_ECX(r) ((r)[HOST_ECX])
35 #define REGS_EDX(r) ((r)[HOST_EDX])
36 #define REGS_ESI(r) ((r)[HOST_ESI])
37 #define REGS_EDI(r) ((r)[HOST_EDI])
38 #define REGS_EBP(r) ((r)[HOST_EBP])
39 #define REGS_CS(r) ((r)[HOST_CS])
40 #define REGS_SS(r) ((r)[HOST_SS])
41 #define REGS_DS(r) ((r)[HOST_DS])
42 #define REGS_ES(r) ((r)[HOST_ES])
43 #define REGS_FS(r) ((r)[HOST_FS])
44 #define REGS_GS(r) ((r)[HOST_GS])
45
46 #define REGS_SET_SYSCALL_RETURN(r, res) REGS_EAX(r) = (res)
47
48 #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
49
50 #ifndef PTRACE_SYSEMU_SINGLESTEP
51 #define PTRACE_SYSEMU_SINGLESTEP 32
52 #endif
53
54 struct uml_pt_regs {
55 unsigned long gp[MAX_REG_NR];
56 struct faultinfo faultinfo;
57 long syscall;
58 int is_user;
59 };
60
61 #define EMPTY_UML_PT_REGS { }
62
63 #define UPT_IP(r) REGS_IP((r)->gp)
64 #define UPT_SP(r) REGS_SP((r)->gp)
65 #define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp)
66 #define UPT_EAX(r) REGS_EAX((r)->gp)
67 #define UPT_EBX(r) REGS_EBX((r)->gp)
68 #define UPT_ECX(r) REGS_ECX((r)->gp)
69 #define UPT_EDX(r) REGS_EDX((r)->gp)
70 #define UPT_ESI(r) REGS_ESI((r)->gp)
71 #define UPT_EDI(r) REGS_EDI((r)->gp)
72 #define UPT_EBP(r) REGS_EBP((r)->gp)
73 #define UPT_ORIG_EAX(r) ((r)->syscall)
74 #define UPT_CS(r) REGS_CS((r)->gp)
75 #define UPT_SS(r) REGS_SS((r)->gp)
76 #define UPT_DS(r) REGS_DS((r)->gp)
77 #define UPT_ES(r) REGS_ES((r)->gp)
78 #define UPT_FS(r) REGS_FS((r)->gp)
79 #define UPT_GS(r) REGS_GS((r)->gp)
80
81 #define UPT_SYSCALL_ARG1(r) UPT_EBX(r)
82 #define UPT_SYSCALL_ARG2(r) UPT_ECX(r)
83 #define UPT_SYSCALL_ARG3(r) UPT_EDX(r)
84 #define UPT_SYSCALL_ARG4(r) UPT_ESI(r)
85 #define UPT_SYSCALL_ARG5(r) UPT_EDI(r)
86 #define UPT_SYSCALL_ARG6(r) UPT_EBP(r)
87
88 extern int user_context(unsigned long sp);
89
90 #define UPT_IS_USER(r) ((r)->is_user)
91
92 struct syscall_args {
93 unsigned long args[6];
94 };
95
96 #define SYSCALL_ARGS(r) ((struct syscall_args) \
97 { .args = { UPT_SYSCALL_ARG1(r), \
98 UPT_SYSCALL_ARG2(r), \
99 UPT_SYSCALL_ARG3(r), \
100 UPT_SYSCALL_ARG4(r), \
101 UPT_SYSCALL_ARG5(r), \
102 UPT_SYSCALL_ARG6(r) } } )
103
104 #define UPT_REG(regs, reg) \
105 ({ unsigned long val; \
106 switch(reg){ \
107 case EIP: val = UPT_IP(regs); break; \
108 case UESP: val = UPT_SP(regs); break; \
109 case EAX: val = UPT_EAX(regs); break; \
110 case EBX: val = UPT_EBX(regs); break; \
111 case ECX: val = UPT_ECX(regs); break; \
112 case EDX: val = UPT_EDX(regs); break; \
113 case ESI: val = UPT_ESI(regs); break; \
114 case EDI: val = UPT_EDI(regs); break; \
115 case EBP: val = UPT_EBP(regs); break; \
116 case ORIG_EAX: val = UPT_ORIG_EAX(regs); break; \
117 case CS: val = UPT_CS(regs); break; \
118 case SS: val = UPT_SS(regs); break; \
119 case DS: val = UPT_DS(regs); break; \
120 case ES: val = UPT_ES(regs); break; \
121 case FS: val = UPT_FS(regs); break; \
122 case GS: val = UPT_GS(regs); break; \
123 case EFL: val = UPT_EFLAGS(regs); break; \
124 default : \
125 panic("Bad register in UPT_REG : %d\n", reg); \
126 val = -1; \
127 } \
128 val; \
129 })
130
131 #define UPT_SET(regs, reg, val) \
132 do { \
133 switch(reg){ \
134 case EIP: UPT_IP(regs) = val; break; \
135 case UESP: UPT_SP(regs) = val; break; \
136 case EAX: UPT_EAX(regs) = val; break; \
137 case EBX: UPT_EBX(regs) = val; break; \
138 case ECX: UPT_ECX(regs) = val; break; \
139 case EDX: UPT_EDX(regs) = val; break; \
140 case ESI: UPT_ESI(regs) = val; break; \
141 case EDI: UPT_EDI(regs) = val; break; \
142 case EBP: UPT_EBP(regs) = val; break; \
143 case ORIG_EAX: UPT_ORIG_EAX(regs) = val; break; \
144 case CS: UPT_CS(regs) = val; break; \
145 case SS: UPT_SS(regs) = val; break; \
146 case DS: UPT_DS(regs) = val; break; \
147 case ES: UPT_ES(regs) = val; break; \
148 case FS: UPT_FS(regs) = val; break; \
149 case GS: UPT_GS(regs) = val; break; \
150 case EFL: UPT_EFLAGS(regs) = val; break; \
151 default : \
152 panic("Bad register in UPT_SET : %d\n", reg); \
153 break; \
154 } \
155 } while (0)
156
157 #define UPT_SET_SYSCALL_RETURN(r, res) \
158 REGS_SET_SYSCALL_RETURN((r)->regs, (res))
159
160 #define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->gp)
161
162 #define UPT_ORIG_SYSCALL(r) UPT_EAX(r)
163 #define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r)
164 #define UPT_SYSCALL_RET(r) UPT_EAX(r)
165
166 #define UPT_FAULTINFO(r) (&(r)->faultinfo)
167
168 extern void arch_init_registers(int pid);
169
170 #endif
171
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