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Commit | Line | Data |
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88dae46d SB |
1 | /* |
2 | * qemu bsd user mode definition | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
84778508 BS |
17 | #ifndef QEMU_H |
18 | #define QEMU_H | |
19 | ||
84778508 BS |
20 | |
21 | #include "cpu.h" | |
f08b6170 | 22 | #include "exec/cpu_ldst.h" |
84778508 BS |
23 | |
24 | #undef DEBUG_REMAP | |
25 | #ifdef DEBUG_REMAP | |
84778508 BS |
26 | #endif /* DEBUG_REMAP */ |
27 | ||
022c62cb | 28 | #include "exec/user/abitypes.h" |
84778508 | 29 | |
4b599848 WL |
30 | extern char **environ; |
31 | ||
84778508 BS |
32 | enum BSDType { |
33 | target_freebsd, | |
34 | target_netbsd, | |
35 | target_openbsd, | |
36 | }; | |
78cfb07f | 37 | extern enum BSDType bsd_type; |
84778508 BS |
38 | |
39 | #include "syscall_defs.h" | |
0c6940d0 | 40 | #include "target_syscall.h" |
022c62cb | 41 | #include "exec/gdbstub.h" |
84778508 | 42 | |
2f7bb878 | 43 | #if defined(CONFIG_USE_NPTL) |
84778508 BS |
44 | #define THREAD __thread |
45 | #else | |
46 | #define THREAD | |
47 | #endif | |
48 | ||
c2bdd9a1 WL |
49 | /* |
50 | * This struct is used to hold certain information about the image. Basically, | |
51 | * it replicates in user space what would be certain task_struct fields in the | |
52 | * kernel | |
84778508 BS |
53 | */ |
54 | struct image_info { | |
55 | abi_ulong load_addr; | |
56 | abi_ulong start_code; | |
57 | abi_ulong end_code; | |
58 | abi_ulong start_data; | |
59 | abi_ulong end_data; | |
60 | abi_ulong start_brk; | |
61 | abi_ulong brk; | |
62 | abi_ulong start_mmap; | |
63 | abi_ulong mmap; | |
64 | abi_ulong rss; | |
65 | abi_ulong start_stack; | |
66 | abi_ulong entry; | |
67 | abi_ulong code_offset; | |
68 | abi_ulong data_offset; | |
84778508 BS |
69 | }; |
70 | ||
71 | #define MAX_SIGQUEUE_SIZE 1024 | |
72 | ||
73 | struct sigqueue { | |
74 | struct sigqueue *next; | |
84778508 BS |
75 | }; |
76 | ||
77 | struct emulated_sigtable { | |
78 | int pending; /* true if signal is pending */ | |
79 | struct sigqueue *first; | |
c2bdd9a1 WL |
80 | /* in order to always have memory for the first signal, we put it here */ |
81 | struct sigqueue info; | |
84778508 BS |
82 | }; |
83 | ||
c2bdd9a1 WL |
84 | /* |
85 | * NOTE: we force a big alignment so that the stack stored after is aligned too | |
86 | */ | |
84778508 | 87 | typedef struct TaskState { |
bd88c780 AB |
88 | pid_t ts_tid; /* tid (or pid) of this task */ |
89 | ||
84778508 BS |
90 | struct TaskState *next; |
91 | int used; /* non zero if used */ | |
92 | struct image_info *info; | |
93 | ||
94 | struct emulated_sigtable sigtab[TARGET_NSIG]; | |
95 | struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ | |
96 | struct sigqueue *first_free; /* first free siginfo queue entry */ | |
97 | int signal_pending; /* non zero if a signal may be pending */ | |
98 | ||
f7795e40 | 99 | uint8_t stack[]; |
84778508 BS |
100 | } __attribute__((aligned(16))) TaskState; |
101 | ||
102 | void init_task_state(TaskState *ts); | |
103 | extern const char *qemu_uname_release; | |
2fa5d9ba | 104 | extern unsigned long mmap_min_addr; |
84778508 | 105 | |
84778508 BS |
106 | /* |
107 | * MAX_ARG_PAGES defines the number of pages allocated for arguments | |
108 | * and envelope for the new program. 32 should suffice, this gives | |
109 | * a maximum env+arg of 128kB w/4KB pages! | |
110 | */ | |
111 | #define MAX_ARG_PAGES 32 | |
112 | ||
113 | /* | |
114 | * This structure is used to hold the arguments that are | |
115 | * used when loading binaries. | |
116 | */ | |
afcbcff8 | 117 | struct bsd_binprm { |
84778508 BS |
118 | char buf[128]; |
119 | void *page[MAX_ARG_PAGES]; | |
120 | abi_ulong p; | |
121 | int fd; | |
122 | int e_uid, e_gid; | |
123 | int argc, envc; | |
124 | char **argv; | |
125 | char **envp; | |
1b50ff64 WL |
126 | char *filename; /* (Given) Name of binary */ |
127 | char *fullpath; /* Full path of binary */ | |
84778508 BS |
128 | }; |
129 | ||
130 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); | |
131 | abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, | |
ffa03665 | 132 | abi_ulong stringp); |
036a013f | 133 | int loader_exec(const char *filename, char **argv, char **envp, |
d37853f9 WL |
134 | struct target_pt_regs *regs, struct image_info *infop, |
135 | struct bsd_binprm *bprm); | |
84778508 | 136 | |
afcbcff8 | 137 | int load_elf_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 138 | struct image_info *info); |
afcbcff8 | 139 | int load_flt_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 140 | struct image_info *info); |
84778508 BS |
141 | |
142 | abi_long memcpy_to_target(abi_ulong dest, const void *src, | |
143 | unsigned long len); | |
144 | void target_set_brk(abi_ulong new_brk); | |
145 | abi_long do_brk(abi_ulong new_brk); | |
146 | void syscall_init(void); | |
147 | abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, | |
148 | abi_long arg2, abi_long arg3, abi_long arg4, | |
78cfb07f JL |
149 | abi_long arg5, abi_long arg6, abi_long arg7, |
150 | abi_long arg8); | |
84778508 BS |
151 | abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, |
152 | abi_long arg2, abi_long arg3, abi_long arg4, | |
153 | abi_long arg5, abi_long arg6); | |
154 | abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, | |
155 | abi_long arg2, abi_long arg3, abi_long arg4, | |
156 | abi_long arg5, abi_long arg6); | |
e5924d89 | 157 | void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); |
dca1173c | 158 | extern THREAD CPUState *thread_cpu; |
9349b4f9 | 159 | void cpu_loop(CPUArchState *env); |
84778508 BS |
160 | char *target_strerror(int err); |
161 | int get_osversion(void); | |
162 | void fork_start(void); | |
163 | void fork_end(int child); | |
164 | ||
1de7afc9 | 165 | #include "qemu/log.h" |
84778508 BS |
166 | |
167 | /* strace.c */ | |
88dae46d SB |
168 | struct syscallname { |
169 | int nr; | |
170 | const char *name; | |
171 | const char *format; | |
172 | void (*call)(const struct syscallname *, | |
173 | abi_long, abi_long, abi_long, | |
174 | abi_long, abi_long, abi_long); | |
175 | void (*result)(const struct syscallname *, abi_long); | |
176 | }; | |
177 | ||
84778508 BS |
178 | void |
179 | print_freebsd_syscall(int num, | |
180 | abi_long arg1, abi_long arg2, abi_long arg3, | |
181 | abi_long arg4, abi_long arg5, abi_long arg6); | |
182 | void print_freebsd_syscall_ret(int num, abi_long ret); | |
183 | void | |
184 | print_netbsd_syscall(int num, | |
185 | abi_long arg1, abi_long arg2, abi_long arg3, | |
186 | abi_long arg4, abi_long arg5, abi_long arg6); | |
187 | void print_netbsd_syscall_ret(int num, abi_long ret); | |
188 | void | |
189 | print_openbsd_syscall(int num, | |
190 | abi_long arg1, abi_long arg2, abi_long arg3, | |
191 | abi_long arg4, abi_long arg5, abi_long arg6); | |
192 | void print_openbsd_syscall_ret(int num, abi_long ret); | |
193 | extern int do_strace; | |
194 | ||
195 | /* signal.c */ | |
9349b4f9 | 196 | void process_pending_signals(CPUArchState *cpu_env); |
84778508 | 197 | void signal_init(void); |
9349b4f9 AF |
198 | long do_sigreturn(CPUArchState *env); |
199 | long do_rt_sigreturn(CPUArchState *env); | |
84778508 BS |
200 | abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); |
201 | ||
202 | /* mmap.c */ | |
203 | int target_mprotect(abi_ulong start, abi_ulong len, int prot); | |
204 | abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, | |
205 | int flags, int fd, abi_ulong offset); | |
206 | int target_munmap(abi_ulong start, abi_ulong len); | |
207 | abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, | |
208 | abi_ulong new_size, unsigned long flags, | |
209 | abi_ulong new_addr); | |
210 | int target_msync(abi_ulong start, abi_ulong len, int flags); | |
211 | extern unsigned long last_brk; | |
84778508 BS |
212 | void mmap_fork_start(void); |
213 | void mmap_fork_end(int child); | |
84778508 | 214 | |
28e738dc BS |
215 | /* main.c */ |
216 | extern unsigned long x86_stack_size; | |
217 | ||
84778508 BS |
218 | /* user access */ |
219 | ||
1720751f RH |
220 | #define VERIFY_READ PAGE_READ |
221 | #define VERIFY_WRITE (PAGE_READ | PAGE_WRITE) | |
84778508 | 222 | |
1720751f | 223 | static inline bool access_ok(int type, abi_ulong addr, abi_ulong size) |
84778508 | 224 | { |
1720751f | 225 | return page_check_range((target_ulong)addr, size, type) == 0; |
84778508 BS |
226 | } |
227 | ||
c2bdd9a1 WL |
228 | /* |
229 | * NOTE __get_user and __put_user use host pointers and don't check access. | |
230 | * | |
231 | * These are usually used to access struct data members once the struct has been | |
232 | * locked - usually with lock_user_struct(). | |
84778508 BS |
233 | */ |
234 | #define __put_user(x, hptr)\ | |
235 | ({\ | |
236 | int size = sizeof(*hptr);\ | |
cefbade1 | 237 | switch (size) {\ |
84778508 BS |
238 | case 1:\ |
239 | *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ | |
240 | break;\ | |
241 | case 2:\ | |
242 | *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ | |
243 | break;\ | |
244 | case 4:\ | |
245 | *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ | |
246 | break;\ | |
247 | case 8:\ | |
248 | *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ | |
249 | break;\ | |
250 | default:\ | |
251 | abort();\ | |
036a013f | 252 | } \ |
84778508 BS |
253 | 0;\ |
254 | }) | |
255 | ||
256 | #define __get_user(x, hptr) \ | |
257 | ({\ | |
258 | int size = sizeof(*hptr);\ | |
cefbade1 | 259 | switch (size) {\ |
84778508 BS |
260 | case 1:\ |
261 | x = (typeof(*hptr))*(uint8_t *)(hptr);\ | |
262 | break;\ | |
263 | case 2:\ | |
264 | x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ | |
265 | break;\ | |
266 | case 4:\ | |
267 | x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ | |
268 | break;\ | |
269 | case 8:\ | |
270 | x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ | |
271 | break;\ | |
272 | default:\ | |
84778508 BS |
273 | x = 0;\ |
274 | abort();\ | |
036a013f | 275 | } \ |
84778508 BS |
276 | 0;\ |
277 | }) | |
278 | ||
c2bdd9a1 WL |
279 | /* |
280 | * put_user()/get_user() take a guest address and check access | |
281 | * | |
282 | * These are usually used to access an atomic data type, such as an int, that | |
283 | * has been passed by address. These internally perform locking and unlocking | |
284 | * on the data type. | |
84778508 BS |
285 | */ |
286 | #define put_user(x, gaddr, target_type) \ | |
287 | ({ \ | |
288 | abi_ulong __gaddr = (gaddr); \ | |
289 | target_type *__hptr; \ | |
290 | abi_long __ret; \ | |
33066934 WL |
291 | __hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0); \ |
292 | if (__hptr) { \ | |
84778508 BS |
293 | __ret = __put_user((x), __hptr); \ |
294 | unlock_user(__hptr, __gaddr, sizeof(target_type)); \ | |
295 | } else \ | |
296 | __ret = -TARGET_EFAULT; \ | |
297 | __ret; \ | |
298 | }) | |
299 | ||
300 | #define get_user(x, gaddr, target_type) \ | |
301 | ({ \ | |
302 | abi_ulong __gaddr = (gaddr); \ | |
303 | target_type *__hptr; \ | |
304 | abi_long __ret; \ | |
33066934 WL |
305 | __hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1); \ |
306 | if (__hptr) { \ | |
84778508 BS |
307 | __ret = __get_user((x), __hptr); \ |
308 | unlock_user(__hptr, __gaddr, 0); \ | |
309 | } else { \ | |
84778508 BS |
310 | (x) = 0; \ |
311 | __ret = -TARGET_EFAULT; \ | |
312 | } \ | |
313 | __ret; \ | |
314 | }) | |
315 | ||
316 | #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) | |
317 | #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) | |
318 | #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) | |
319 | #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) | |
320 | #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) | |
321 | #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) | |
322 | #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) | |
323 | #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) | |
324 | #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) | |
325 | #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) | |
326 | ||
327 | #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) | |
328 | #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) | |
329 | #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) | |
330 | #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) | |
331 | #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) | |
332 | #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) | |
333 | #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) | |
334 | #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) | |
335 | #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) | |
336 | #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) | |
337 | ||
c2bdd9a1 WL |
338 | /* |
339 | * copy_from_user() and copy_to_user() are usually used to copy data | |
84778508 BS |
340 | * buffers between the target and host. These internally perform |
341 | * locking/unlocking of the memory. | |
342 | */ | |
343 | abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); | |
344 | abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); | |
345 | ||
c2bdd9a1 WL |
346 | /* |
347 | * Functions for accessing guest memory. The tget and tput functions | |
348 | * read/write single values, byteswapping as necessary. The lock_user function | |
349 | * gets a pointer to a contiguous area of guest memory, but does not perform | |
350 | * any byteswapping. lock_user may return either a pointer to the guest | |
351 | * memory, or a temporary buffer. | |
352 | */ | |
84778508 | 353 | |
c2bdd9a1 WL |
354 | /* |
355 | * Lock an area of guest memory into the host. If copy is true then the | |
356 | * host area will have the same contents as the guest. | |
357 | */ | |
358 | static inline void *lock_user(int type, abi_ulong guest_addr, long len, | |
359 | int copy) | |
84778508 | 360 | { |
cb0ea019 | 361 | if (!access_ok(type, guest_addr, len)) { |
84778508 | 362 | return NULL; |
cb0ea019 | 363 | } |
84778508 BS |
364 | #ifdef DEBUG_REMAP |
365 | { | |
366 | void *addr; | |
fd9a3048 | 367 | addr = g_malloc(len); |
cb0ea019 | 368 | if (copy) { |
3e8f1628 | 369 | memcpy(addr, g2h_untagged(guest_addr), len); |
cb0ea019 | 370 | } else { |
84778508 | 371 | memset(addr, 0, len); |
cb0ea019 | 372 | } |
84778508 BS |
373 | return addr; |
374 | } | |
375 | #else | |
3e8f1628 | 376 | return g2h_untagged(guest_addr); |
84778508 BS |
377 | #endif |
378 | } | |
379 | ||
c2bdd9a1 WL |
380 | /* |
381 | * Unlock an area of guest memory. The first LEN bytes must be flushed back to | |
382 | * guest memory. host_ptr = NULL is explicitly allowed and does nothing. | |
383 | */ | |
84778508 BS |
384 | static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, |
385 | long len) | |
386 | { | |
387 | ||
388 | #ifdef DEBUG_REMAP | |
cb0ea019 | 389 | if (!host_ptr) { |
84778508 | 390 | return; |
cb0ea019 WL |
391 | } |
392 | if (host_ptr == g2h_untagged(guest_addr)) { | |
84778508 | 393 | return; |
cb0ea019 WL |
394 | } |
395 | if (len > 0) { | |
3e8f1628 | 396 | memcpy(g2h_untagged(guest_addr), host_ptr, len); |
cb0ea019 | 397 | } |
fd9a3048 | 398 | g_free(host_ptr); |
84778508 BS |
399 | #endif |
400 | } | |
401 | ||
c2bdd9a1 WL |
402 | /* |
403 | * Return the length of a string in target memory or -TARGET_EFAULT if access | |
404 | * error. | |
405 | */ | |
84778508 BS |
406 | abi_long target_strlen(abi_ulong gaddr); |
407 | ||
408 | /* Like lock_user but for null terminated strings. */ | |
409 | static inline void *lock_user_string(abi_ulong guest_addr) | |
410 | { | |
411 | abi_long len; | |
412 | len = target_strlen(guest_addr); | |
cb0ea019 | 413 | if (len < 0) { |
84778508 | 414 | return NULL; |
cb0ea019 | 415 | } |
84778508 BS |
416 | return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); |
417 | } | |
418 | ||
41d1af4d | 419 | /* Helper macros for locking/unlocking a target struct. */ |
84778508 BS |
420 | #define lock_user_struct(type, host_ptr, guest_addr, copy) \ |
421 | (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) | |
422 | #define unlock_user_struct(host_ptr, guest_addr, copy) \ | |
423 | unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) | |
424 | ||
2f7bb878 | 425 | #if defined(CONFIG_USE_NPTL) |
84778508 BS |
426 | #include <pthread.h> |
427 | #endif | |
428 | ||
429 | #endif /* QEMU_H */ |