aboutsummaryrefslogtreecommitdiffstats
path: root/arch/um/include/sysdep-i386/ptrace.h
blob: c8ee9559f3ab2d3994fc83e424627b9c53993607 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
/* 
 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
 * Licensed under the GPL
 */

#ifndef __SYSDEP_I386_PTRACE_H
#define __SYSDEP_I386_PTRACE_H

#include "uml-config.h"
#include "user_constants.h"
#include "sysdep/faultinfo.h"
#include "choose-mode.h"

#define MAX_REG_NR (UM_FRAME_SIZE / sizeof(unsigned long))
#define MAX_REG_OFFSET (UM_FRAME_SIZE)

extern void update_debugregs(int seq);

/* syscall emulation path in ptrace */

#ifndef PTRACE_SYSEMU
#define PTRACE_SYSEMU 31
#endif

void set_using_sysemu(int value);
int get_using_sysemu(void);
extern int sysemu_supported;

#ifdef UML_CONFIG_MODE_TT
#include "sysdep/sc.h"
#endif

#ifdef UML_CONFIG_MODE_SKAS

#include "skas_ptregs.h"

#define REGS_IP(r) ((r)[HOST_IP])
#define REGS_SP(r) ((r)[HOST_SP])
#define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
#define REGS_EAX(r) ((r)[HOST_EAX])
#define REGS_EBX(r) ((r)[HOST_EBX])
#define REGS_ECX(r) ((r)[HOST_ECX])
#define REGS_EDX(r) ((r)[HOST_EDX])
#define REGS_ESI(r) ((r)[HOST_ESI])
#define REGS_EDI(r) ((r)[HOST_EDI])
#define REGS_EBP(r) ((r)[HOST_EBP])
#define REGS_CS(r) ((r)[HOST_CS])
#define REGS_SS(r) ((r)[HOST_SS])
#define REGS_DS(r) ((r)[HOST_DS])
#define REGS_ES(r) ((r)[HOST_ES])
#define REGS_FS(r) ((r)[HOST_FS])
#define REGS_GS(r) ((r)[HOST_GS])

#define REGS_SET_SYSCALL_RETURN(r, res) REGS_EAX(r) = (res)

#define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))

#endif
#ifndef PTRACE_SYSEMU_SINGLESTEP
#define PTRACE_SYSEMU_SINGLESTEP 32
#endif

union uml_pt_regs {
#ifdef UML_CONFIG_MODE_TT
	struct tt_regs {
		long syscall;
		void *sc;
                struct faultinfo faultinfo;
	} tt;
#endif
#ifdef UML_CONFIG_MODE_SKAS
	struct skas_regs {
		unsigned long regs[HOST_FRAME_SIZE];
		unsigned long fp[HOST_FP_SIZE];
		unsigned long xfp[HOST_XFP_SIZE];
                struct faultinfo faultinfo;
		long syscall;
		int is_user;
	} skas;
#endif
};

#define EMPTY_UML_PT_REGS { }

extern int mode_tt;

#define UPT_SC(r) ((r)->tt.sc)
#define UPT_IP(r) \
	__CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs))
#define UPT_SP(r) \
	__CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs))
#define UPT_EFLAGS(r) \
	__CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs))
#define UPT_EAX(r) \
	__CHOOSE_MODE(SC_EAX(UPT_SC(r)), REGS_EAX((r)->skas.regs))
#define UPT_EBX(r) \
	__CHOOSE_MODE(SC_EBX(UPT_SC(r)), REGS_EBX((r)->skas.regs))
#define UPT_ECX(r) \
	__CHOOSE_MODE(SC_ECX(UPT_SC(r)), REGS_ECX((r)->skas.regs))
#define UPT_EDX(r) \
	__CHOOSE_MODE(SC_EDX(UPT_SC(r)), REGS_EDX((r)->skas.regs))
#define UPT_ESI(r) \
	__CHOOSE_MODE(SC_ESI(UPT_SC(r)), REGS_ESI((r)->skas.regs))
#define UPT_EDI(r) \
	__CHOOSE_MODE(SC_EDI(UPT_SC(r)), REGS_EDI((r)->skas.regs))
#define UPT_EBP(r) \
	__CHOOSE_MODE(SC_EBP(UPT_SC(r)), REGS_EBP((r)->skas.regs))
#define UPT_ORIG_EAX(r) \
	__CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall)
#define UPT_CS(r) \
	__CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
#define UPT_SS(r) \
	__CHOOSE_MODE(SC_SS(UPT_SC(r)), REGS_SS((r)->skas.regs))
#define UPT_DS(r) \
	__CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs))
#define UPT_ES(r) \
	__CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs))
#define UPT_FS(r) \
	__CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs))
#define UPT_GS(r) \
	__CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs))

#define UPT_SYSCALL_ARG1(r) UPT_EBX(r)
#define UPT_SYSCALL_ARG2(r) UPT_ECX(r)
#define UPT_SYSCALL_ARG3(r) UPT_EDX(r)
#define UPT_SYSCALL_ARG4(r) UPT_ESI(r)
#define UPT_SYSCALL_ARG5(r) UPT_EDI(r)
#define UPT_SYSCALL_ARG6(r) UPT_EBP(r)

extern int user_context(unsigned long sp);

#define UPT_IS_USER(r) \
	CHOOSE_MODE(user_context(UPT_SP(r)), (r)->skas.is_user)

struct syscall_args {
	unsigned long args[6];
};

#define SYSCALL_ARGS(r) ((struct syscall_args) \
                        { .args = { UPT_SYSCALL_ARG1(r), \
                                    UPT_SYSCALL_ARG2(r), \
 			            UPT_SYSCALL_ARG3(r), \
                                    UPT_SYSCALL_ARG4(r), \
		                    UPT_SYSCALL_ARG5(r), \
                                    UPT_SYSCALL_ARG6(r) } } )

#define UPT_REG(regs, reg) \
	({	unsigned long val; \
		switch(reg){ \
		case EIP: val = UPT_IP(regs); break; \
		case UESP: val = UPT_SP(regs); break; \
		case EAX: val = UPT_EAX(regs); break; \
		case EBX: val = UPT_EBX(regs); break; \
		case ECX: val = UPT_ECX(regs); break; \
		case EDX: val = UPT_EDX(regs); break; \
		case ESI: val = UPT_ESI(regs); break; \
		case EDI: val = UPT_EDI(regs); break; \
		case EBP: val = UPT_EBP(regs); break; \
		case ORIG_EAX: val = UPT_ORIG_EAX(regs); break; \
		case CS: val = UPT_CS(regs); break; \
		case SS: val = UPT_SS(regs); break; \
		case DS: val = UPT_DS(regs); break; \
		case ES: val = UPT_ES(regs); break; \
		case FS: val = UPT_FS(regs); break; \
		case GS: val = UPT_GS(regs); break; \
		case EFL: val = UPT_EFLAGS(regs); break; \
		default :  \
			panic("Bad register in UPT_REG : %d\n", reg);  \
			val = -1; \
		} \
	        val; \
	})
	

#define UPT_SET(regs, reg, val) \
	do { \
		switch(reg){ \
		case EIP: UPT_IP(regs) = val; break; \
		case UESP: UPT_SP(regs) = val; break; \
		case EAX: UPT_EAX(regs) = val; break; \
		case EBX: UPT_EBX(regs) = val; break; \
		case ECX: UPT_ECX(regs) = val; break; \
		case EDX: UPT_EDX(regs) = val; break; \
		case ESI: UPT_ESI(regs) = val; break; \
		case EDI: UPT_EDI(regs) = val; break; \
		case EBP: UPT_EBP(regs) = val; break; \
		case ORIG_EAX: UPT_ORIG_EAX(regs) = val; break; \
		case CS: UPT_CS(regs) = val; break; \
		case SS: UPT_SS(regs) = val; break; \
		case DS: UPT_DS(regs) = val; break; \
		case ES: UPT_ES(regs) = val; break; \
		case FS: UPT_FS(regs) = val; break; \
		case GS: UPT_GS(regs) = val; break; \
		case EFL: UPT_EFLAGS(regs) = val; break; \
		default :  \
			panic("Bad register in UPT_SET : %d\n", reg);  \
			break; \
		} \
	} while (0)

#define UPT_SET_SYSCALL_RETURN(r, res) \
	CHOOSE_MODE(SC_SET_SYSCALL_RETURN(UPT_SC(r), (res)), \
                    REGS_SET_SYSCALL_RETURN((r)->skas.regs, (res)))

#define UPT_RESTART_SYSCALL(r) \
	CHOOSE_MODE(SC_RESTART_SYSCALL(UPT_SC(r)), \
		    REGS_RESTART_SYSCALL((r)->skas.regs))

#define UPT_ORIG_SYSCALL(r) UPT_EAX(r)
#define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r)
#define UPT_SYSCALL_RET(r) UPT_EAX(r)

#define UPT_FAULTINFO(r) \
        CHOOSE_MODE((&(r)->tt.faultinfo), (&(r)->skas.faultinfo))

#endif

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-file-style: "linux"
 * End:
 */