aboutsummaryrefslogtreecommitdiff
path: root/linux-user/qemu.h
blob: a797c512bb7f0c38360d2c76bc85f7fe082263e7 (plain)
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
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
#ifndef QEMU_H
#define QEMU_H

#include "thunk.h"

#include <signal.h>
#include <string.h>
#include "syscall_defs.h"

#include "cpu.h"
#include "syscall.h"
#include "gdbstub.h"

/* This struct is used to hold certain information about the image.
 * Basically, it replicates in user space what would be certain
 * task_struct fields in the kernel
 */
struct image_info {
	unsigned long	start_code;
	unsigned long	end_code;
	unsigned long	end_data;
	unsigned long	start_brk;
	unsigned long	brk;
	unsigned long	start_mmap;
	unsigned long	mmap;
	unsigned long	rss;
	unsigned long	start_stack;
	unsigned long	arg_start;
	unsigned long	arg_end;
	unsigned long	env_start;
	unsigned long	env_end;
	unsigned long	entry;
	int		personality;
};

#ifdef TARGET_I386
/* Information about the current linux thread */
struct vm86_saved_state {
    uint32_t eax; /* return code */
    uint32_t ebx;
    uint32_t ecx;
    uint32_t edx;
    uint32_t esi;
    uint32_t edi;
    uint32_t ebp;
    uint32_t esp;
    uint32_t eflags;
    uint32_t eip;
    uint16_t cs, ss, ds, es, fs, gs;
};
#endif

#ifdef TARGET_ARM
/* FPU emulator */
#include "nwfpe/fpa11.h"
#endif

/* NOTE: we force a big alignment so that the stack stored after is
   aligned too */
typedef struct TaskState {
    struct TaskState *next;
#ifdef TARGET_ARM
    /* FPA state */
    FPA11 fpa;
    /* Extra fields for semihosted binaries.  */
    uint32_t stack_base;
    uint32_t heap_base;
    uint32_t heap_limit;
    int swi_errno;
#endif
#ifdef TARGET_I386
    target_ulong target_v86;
    struct vm86_saved_state vm86_saved_regs;
    struct target_vm86plus_struct vm86plus;
    uint32_t v86flags;
    uint32_t v86mask;
#endif
    int used; /* non zero if used */
    uint8_t stack[0];
} __attribute__((aligned(16))) TaskState;

extern TaskState *first_task_state;

int elf_exec(const char * filename, char ** argv, char ** envp, 
             struct target_pt_regs * regs, struct image_info *infop);

void target_set_brk(target_ulong new_brk);
long do_brk(target_ulong new_brk);
void syscall_init(void);
long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3, 
                long arg4, long arg5, long arg6);
void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
extern CPUState *global_env;
void cpu_loop(CPUState *env);
void init_paths(const char *prefix);
const char *path(const char *pathname);

extern int loglevel;
extern FILE *logfile;

/* signal.c */
void process_pending_signals(void *cpu_env);
void signal_init(void);
int queue_signal(int sig, target_siginfo_t *info);
void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
long do_sigreturn(CPUState *env);
long do_rt_sigreturn(CPUState *env);

#ifdef TARGET_I386
/* vm86.c */
void save_v86_state(CPUX86State *env);
void handle_vm86_trap(CPUX86State *env, int trapno);
void handle_vm86_fault(CPUX86State *env);
int do_vm86(CPUX86State *env, long subfunction, target_ulong v86_addr);
#endif

/* mmap.c */
int target_mprotect(target_ulong start, target_ulong len, int prot);
long target_mmap(target_ulong start, target_ulong len, int prot, 
                 int flags, int fd, target_ulong offset);
int target_munmap(target_ulong start, target_ulong len);
long target_mremap(target_ulong old_addr, target_ulong old_size, 
                   target_ulong new_size, unsigned long flags,
                   target_ulong new_addr);
int target_msync(target_ulong start, target_ulong len, int flags);

/* user access */

#define VERIFY_READ 0
#define VERIFY_WRITE 1

#define access_ok(type,addr,size) (1)

/* NOTE get_user and put_user use host addresses.  */
#define __put_user(x,ptr)\
({\
    int size = sizeof(*ptr);\
    switch(size) {\
    case 1:\
        *(uint8_t *)(ptr) = (typeof(*ptr))(x);\
        break;\
    case 2:\
        *(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\
        break;\
    case 4:\
        *(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\
        break;\
    case 8:\
        *(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\
        break;\
    default:\
        abort();\
    }\
    0;\
})

#define __get_user(x, ptr) \
({\
    int size = sizeof(*ptr);\
    switch(size) {\
    case 1:\
        x = (typeof(*ptr))*(uint8_t *)(ptr);\
        break;\
    case 2:\
        x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\
        break;\
    case 4:\
        x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\
        break;\
    case 8:\
        x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\
        break;\
    default:\
        abort();\
    }\
    0;\
})

#define put_user(x,ptr)\
({\
    int __ret;\
    if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
        __ret = __put_user(x, ptr);\
    else\
        __ret = -EFAULT;\
    __ret;\
})

#define get_user(x,ptr)\
({\
    int __ret;\
    if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
        __ret = __get_user(x, ptr);\
    else\
        __ret = -EFAULT;\
    __ret;\
})

/* Functions for accessing guest memory.  The tget and tput functions
   read/write single values, byteswapping as neccessary.  The lock_user
   gets a pointer to a contiguous area of guest memory, but does not perform
   and byteswapping.  lock_user may return either a pointer to the guest
   memory, or a temporary buffer.  */

/* Lock an area of guest memory into the host.  If copy is true then the
   host area will have the same contents as the guest.  */
static inline void *lock_user(target_ulong guest_addr, long len, int copy)
{
#ifdef DEBUG_REMAP
    void *addr;
    addr = malloc(len);
    if (copy)
        memcpy(addr, g2h(guest_addr), len);
    else
        memset(addr, 0, len);
    return addr;
#else
    return g2h(guest_addr);
#endif
}

/* Unlock an area of guest memory.  The first LEN bytes must be flushed back
   to guest memory.  */
static inline void unlock_user(void *host_addr, target_ulong guest_addr,
                                long len)
{
#ifdef DEBUG_REMAP
    if (host_addr == g2h(guest_addr))
        return;
    if (len > 0)
        memcpy(g2h(guest_addr), host_addr, len);
    free(host_addr);
#endif
}

/* Return the length of a string in target memory.  */
static inline int target_strlen(target_ulong ptr)
{
  return strlen(g2h(ptr));
}

/* Like lock_user but for null terminated strings.  */
static inline void *lock_user_string(target_ulong guest_addr)
{
    long len;
    len = target_strlen(guest_addr) + 1;
    return lock_user(guest_addr, len, 1);
}

/* Helper macros for locking/ulocking a target struct.  */
#define lock_user_struct(host_ptr, guest_addr, copy) \
    host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy)
#define unlock_user_struct(host_ptr, guest_addr, copy) \
    unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)

#define tget8(addr) ldub(addr)
#define tput8(addr, val) stb(addr, val)
#define tget16(addr) lduw(addr)
#define tput16(addr, val) stw(addr, val)
#define tget32(addr) ldl(addr)
#define tput32(addr, val) stl(addr, val)
#define tget64(addr) ldq(addr)
#define tput64(addr, val) stq(addr, val)
#if TARGET_LONG_BITS == 64
#define tgetl(addr) ldq(addr)
#define tputl(addr, val) stq(addr, val)
#else
#define tgetl(addr) ldl(addr)
#define tputl(addr, val) stl(addr, val)
#endif

#endif /* QEMU_H */