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1#ifndef QEMU_H
2#define QEMU_H
3
4#include <signal.h>
5#include <string.h>
6
7#include "cpu.h"
8
9#undef DEBUG_REMAP
10#ifdef DEBUG_REMAP
11#include <stdlib.h>
12#endif /* DEBUG_REMAP */
13
1609cd44 14#include "qemu-types.h"
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15
16enum BSDType {
17 target_freebsd,
18 target_netbsd,
19 target_openbsd,
20};
21
22#include "syscall_defs.h"
23#include "syscall.h"
24#include "target_signal.h"
25#include "gdbstub.h"
26
2f7bb878 27#if defined(CONFIG_USE_NPTL)
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28#define THREAD __thread
29#else
30#define THREAD
31#endif
32
33/* This struct is used to hold certain information about the image.
34 * Basically, it replicates in user space what would be certain
35 * task_struct fields in the kernel
36 */
37struct image_info {
38 abi_ulong load_addr;
39 abi_ulong start_code;
40 abi_ulong end_code;
41 abi_ulong start_data;
42 abi_ulong end_data;
43 abi_ulong start_brk;
44 abi_ulong brk;
45 abi_ulong start_mmap;
46 abi_ulong mmap;
47 abi_ulong rss;
48 abi_ulong start_stack;
49 abi_ulong entry;
50 abi_ulong code_offset;
51 abi_ulong data_offset;
52 char **host_argv;
53 int personality;
54};
55
56#define MAX_SIGQUEUE_SIZE 1024
57
58struct sigqueue {
59 struct sigqueue *next;
60 //target_siginfo_t info;
61};
62
63struct emulated_sigtable {
64 int pending; /* true if signal is pending */
65 struct sigqueue *first;
66 struct sigqueue info; /* in order to always have memory for the
67 first signal, we put it here */
68};
69
70/* NOTE: we force a big alignment so that the stack stored after is
71 aligned too */
72typedef struct TaskState {
73 struct TaskState *next;
74 int used; /* non zero if used */
75 struct image_info *info;
76
77 struct emulated_sigtable sigtab[TARGET_NSIG];
78 struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
79 struct sigqueue *first_free; /* first free siginfo queue entry */
80 int signal_pending; /* non zero if a signal may be pending */
81
82 uint8_t stack[0];
83} __attribute__((aligned(16))) TaskState;
84
85void init_task_state(TaskState *ts);
86extern const char *qemu_uname_release;
87
88/* ??? See if we can avoid exposing so much of the loader internals. */
89/*
90 * MAX_ARG_PAGES defines the number of pages allocated for arguments
91 * and envelope for the new program. 32 should suffice, this gives
92 * a maximum env+arg of 128kB w/4KB pages!
93 */
94#define MAX_ARG_PAGES 32
95
96/*
97 * This structure is used to hold the arguments that are
98 * used when loading binaries.
99 */
100struct linux_binprm {
101 char buf[128];
102 void *page[MAX_ARG_PAGES];
103 abi_ulong p;
104 int fd;
105 int e_uid, e_gid;
106 int argc, envc;
107 char **argv;
108 char **envp;
109 char * filename; /* Name of binary */
110};
111
112void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);
113abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
114 abi_ulong stringp, int push_ptr);
115int loader_exec(const char * filename, char ** argv, char ** envp,
116 struct target_pt_regs * regs, struct image_info *infop);
117
118int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
119 struct image_info * info);
120int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
121 struct image_info * info);
122
123abi_long memcpy_to_target(abi_ulong dest, const void *src,
124 unsigned long len);
125void target_set_brk(abi_ulong new_brk);
126abi_long do_brk(abi_ulong new_brk);
127void syscall_init(void);
128abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
129 abi_long arg2, abi_long arg3, abi_long arg4,
130 abi_long arg5, abi_long arg6);
131abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
132 abi_long arg2, abi_long arg3, abi_long arg4,
133 abi_long arg5, abi_long arg6);
134abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
135 abi_long arg2, abi_long arg3, abi_long arg4,
136 abi_long arg5, abi_long arg6);
137void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
138extern THREAD CPUState *thread_env;
139void cpu_loop(CPUState *env, enum BSDType bsd_type);
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140char *target_strerror(int err);
141int get_osversion(void);
142void fork_start(void);
143void fork_end(int child);
144
145#include "qemu-log.h"
146
147/* strace.c */
148void
149print_freebsd_syscall(int num,
150 abi_long arg1, abi_long arg2, abi_long arg3,
151 abi_long arg4, abi_long arg5, abi_long arg6);
152void print_freebsd_syscall_ret(int num, abi_long ret);
153void
154print_netbsd_syscall(int num,
155 abi_long arg1, abi_long arg2, abi_long arg3,
156 abi_long arg4, abi_long arg5, abi_long arg6);
157void print_netbsd_syscall_ret(int num, abi_long ret);
158void
159print_openbsd_syscall(int num,
160 abi_long arg1, abi_long arg2, abi_long arg3,
161 abi_long arg4, abi_long arg5, abi_long arg6);
162void print_openbsd_syscall_ret(int num, abi_long ret);
163extern int do_strace;
164
165/* signal.c */
166void process_pending_signals(CPUState *cpu_env);
167void signal_init(void);
168//int queue_signal(CPUState *env, int sig, target_siginfo_t *info);
169//void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
170//void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
171long do_sigreturn(CPUState *env);
172long do_rt_sigreturn(CPUState *env);
173abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
174
175/* mmap.c */
176int target_mprotect(abi_ulong start, abi_ulong len, int prot);
177abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
178 int flags, int fd, abi_ulong offset);
179int target_munmap(abi_ulong start, abi_ulong len);
180abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
181 abi_ulong new_size, unsigned long flags,
182 abi_ulong new_addr);
183int target_msync(abi_ulong start, abi_ulong len, int flags);
184extern unsigned long last_brk;
185void mmap_lock(void);
186void mmap_unlock(void);
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187void cpu_list_lock(void);
188void cpu_list_unlock(void);
2f7bb878 189#if defined(CONFIG_USE_NPTL)
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190void mmap_fork_start(void);
191void mmap_fork_end(int child);
192#endif
193
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194/* main.c */
195extern unsigned long x86_stack_size;
196
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197/* user access */
198
199#define VERIFY_READ 0
200#define VERIFY_WRITE 1 /* implies read access */
201
202static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
203{
204 return page_check_range((target_ulong)addr, size,
205 (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
206}
207
208/* NOTE __get_user and __put_user use host pointers and don't check access. */
209/* These are usually used to access struct data members once the
210 * struct has been locked - usually with lock_user_struct().
211 */
212#define __put_user(x, hptr)\
213({\
214 int size = sizeof(*hptr);\
215 switch(size) {\
216 case 1:\
217 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\
218 break;\
219 case 2:\
220 *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
221 break;\
222 case 4:\
223 *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
224 break;\
225 case 8:\
226 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\
227 break;\
228 default:\
229 abort();\
230 }\
231 0;\
232})
233
234#define __get_user(x, hptr) \
235({\
236 int size = sizeof(*hptr);\
237 switch(size) {\
238 case 1:\
239 x = (typeof(*hptr))*(uint8_t *)(hptr);\
240 break;\
241 case 2:\
242 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
243 break;\
244 case 4:\
245 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
246 break;\
247 case 8:\
248 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
249 break;\
250 default:\
251 /* avoid warning */\
252 x = 0;\
253 abort();\
254 }\
255 0;\
256})
257
258/* put_user()/get_user() take a guest address and check access */
259/* These are usually used to access an atomic data type, such as an int,
260 * that has been passed by address. These internally perform locking
261 * and unlocking on the data type.
262 */
263#define put_user(x, gaddr, target_type) \
264({ \
265 abi_ulong __gaddr = (gaddr); \
266 target_type *__hptr; \
267 abi_long __ret; \
268 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
269 __ret = __put_user((x), __hptr); \
270 unlock_user(__hptr, __gaddr, sizeof(target_type)); \
271 } else \
272 __ret = -TARGET_EFAULT; \
273 __ret; \
274})
275
276#define get_user(x, gaddr, target_type) \
277({ \
278 abi_ulong __gaddr = (gaddr); \
279 target_type *__hptr; \
280 abi_long __ret; \
281 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
282 __ret = __get_user((x), __hptr); \
283 unlock_user(__hptr, __gaddr, 0); \
284 } else { \
285 /* avoid warning */ \
286 (x) = 0; \
287 __ret = -TARGET_EFAULT; \
288 } \
289 __ret; \
290})
291
292#define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
293#define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
294#define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
295#define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
296#define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
297#define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
298#define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
299#define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
300#define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t)
301#define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t)
302
303#define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
304#define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
305#define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
306#define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
307#define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
308#define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
309#define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
310#define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
311#define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t)
312#define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t)
313
314/* copy_from_user() and copy_to_user() are usually used to copy data
315 * buffers between the target and host. These internally perform
316 * locking/unlocking of the memory.
317 */
318abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
319abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
320
321/* Functions for accessing guest memory. The tget and tput functions
322 read/write single values, byteswapping as neccessary. The lock_user
323 gets a pointer to a contiguous area of guest memory, but does not perform
324 and byteswapping. lock_user may return either a pointer to the guest
325 memory, or a temporary buffer. */
326
327/* Lock an area of guest memory into the host. If copy is true then the
328 host area will have the same contents as the guest. */
329static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy)
330{
331 if (!access_ok(type, guest_addr, len))
332 return NULL;
333#ifdef DEBUG_REMAP
334 {
335 void *addr;
336 addr = malloc(len);
337 if (copy)
338 memcpy(addr, g2h(guest_addr), len);
339 else
340 memset(addr, 0, len);
341 return addr;
342 }
343#else
344 return g2h(guest_addr);
345#endif
346}
347
348/* Unlock an area of guest memory. The first LEN bytes must be
349 flushed back to guest memory. host_ptr = NULL is explicitly
350 allowed and does nothing. */
351static inline void unlock_user(void *host_ptr, abi_ulong guest_addr,
352 long len)
353{
354
355#ifdef DEBUG_REMAP
356 if (!host_ptr)
357 return;
358 if (host_ptr == g2h(guest_addr))
359 return;
360 if (len > 0)
361 memcpy(g2h(guest_addr), host_ptr, len);
362 free(host_ptr);
363#endif
364}
365
366/* Return the length of a string in target memory or -TARGET_EFAULT if
367 access error. */
368abi_long target_strlen(abi_ulong gaddr);
369
370/* Like lock_user but for null terminated strings. */
371static inline void *lock_user_string(abi_ulong guest_addr)
372{
373 abi_long len;
374 len = target_strlen(guest_addr);
375 if (len < 0)
376 return NULL;
377 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1);
378}
379
380/* Helper macros for locking/ulocking a target struct. */
381#define lock_user_struct(type, host_ptr, guest_addr, copy) \
382 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
383#define unlock_user_struct(host_ptr, guest_addr, copy) \
384 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
385
2f7bb878 386#if defined(CONFIG_USE_NPTL)
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387#include <pthread.h>
388#endif
389
390#endif /* QEMU_H */