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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 | ||
ab77bd84 | 20 | #include "qemu/osdep.h" |
84778508 | 21 | #include "cpu.h" |
e5e44263 | 22 | #include "qemu/units.h" |
f08b6170 | 23 | #include "exec/cpu_ldst.h" |
ab77bd84 | 24 | #include "exec/exec-all.h" |
84778508 BS |
25 | |
26 | #undef DEBUG_REMAP | |
84778508 | 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 | 38 | |
ab77bd84 WL |
39 | #include "exec/user/thunk.h" |
40 | #include "target_arch.h" | |
84778508 | 41 | #include "syscall_defs.h" |
0c6940d0 | 42 | #include "target_syscall.h" |
82792244 | 43 | #include "target_os_vmparam.h" |
790baacc | 44 | #include "target_os_signal.h" |
022c62cb | 45 | #include "exec/gdbstub.h" |
84778508 | 46 | |
c2bdd9a1 WL |
47 | /* |
48 | * This struct is used to hold certain information about the image. Basically, | |
49 | * it replicates in user space what would be certain task_struct fields in the | |
50 | * kernel | |
84778508 BS |
51 | */ |
52 | struct image_info { | |
0475f8fa | 53 | abi_ulong load_bias; |
84778508 BS |
54 | abi_ulong load_addr; |
55 | abi_ulong start_code; | |
56 | abi_ulong end_code; | |
57 | abi_ulong start_data; | |
58 | abi_ulong end_data; | |
59 | abi_ulong start_brk; | |
60 | abi_ulong brk; | |
61 | abi_ulong start_mmap; | |
62 | abi_ulong mmap; | |
63 | abi_ulong rss; | |
64 | abi_ulong start_stack; | |
65 | abi_ulong entry; | |
66 | abi_ulong code_offset; | |
67 | abi_ulong data_offset; | |
0475f8fa WL |
68 | abi_ulong arg_start; |
69 | abi_ulong arg_end; | |
70 | uint32_t elf_flags; | |
84778508 BS |
71 | }; |
72 | ||
84778508 BS |
73 | struct emulated_sigtable { |
74 | int pending; /* true if signal is pending */ | |
b46d4ad7 | 75 | target_siginfo_t info; |
84778508 BS |
76 | }; |
77 | ||
c2bdd9a1 WL |
78 | /* |
79 | * NOTE: we force a big alignment so that the stack stored after is aligned too | |
80 | */ | |
84778508 | 81 | typedef struct TaskState { |
bd88c780 AB |
82 | pid_t ts_tid; /* tid (or pid) of this task */ |
83 | ||
84778508 | 84 | struct TaskState *next; |
031fe7af | 85 | struct bsd_binprm *bprm; |
84778508 BS |
86 | struct image_info *info; |
87 | ||
88 | struct emulated_sigtable sigtab[TARGET_NSIG]; | |
48047225 WL |
89 | /* |
90 | * Nonzero if process_pending_signals() needs to do something (either | |
91 | * handle a pending signal or unblock signals). | |
92 | * This flag is written from a signal handler so should be accessed via | |
93 | * the qatomic_read() and qatomic_set() functions. (It is not accessed | |
94 | * from multiple threads.) | |
95 | */ | |
96 | int signal_pending; | |
84778508 | 97 | |
f7795e40 | 98 | uint8_t stack[]; |
84778508 BS |
99 | } __attribute__((aligned(16))) TaskState; |
100 | ||
653ccec2 | 101 | void stop_all_tasks(void); |
84778508 BS |
102 | extern const char *qemu_uname_release; |
103 | ||
84778508 | 104 | /* |
e5e44263 WL |
105 | * TARGET_ARG_MAX defines the number of bytes allocated for arguments |
106 | * and envelope for the new program. 256k should suffice for a reasonable | |
107 | * maxiumum env+arg in 32-bit environments, bump it up to 512k for !ILP32 | |
108 | * platforms. | |
84778508 | 109 | */ |
e5e44263 WL |
110 | #if TARGET_ABI_BITS > 32 |
111 | #define TARGET_ARG_MAX (512 * KiB) | |
112 | #else | |
113 | #define TARGET_ARG_MAX (256 * KiB) | |
114 | #endif | |
115 | #define MAX_ARG_PAGES (TARGET_ARG_MAX / TARGET_PAGE_SIZE) | |
84778508 BS |
116 | |
117 | /* | |
118 | * This structure is used to hold the arguments that are | |
119 | * used when loading binaries. | |
120 | */ | |
afcbcff8 | 121 | struct bsd_binprm { |
84778508 BS |
122 | char buf[128]; |
123 | void *page[MAX_ARG_PAGES]; | |
124 | abi_ulong p; | |
98b34d35 | 125 | abi_ulong stringp; |
84778508 BS |
126 | int fd; |
127 | int e_uid, e_gid; | |
128 | int argc, envc; | |
129 | char **argv; | |
130 | char **envp; | |
1b50ff64 WL |
131 | char *filename; /* (Given) Name of binary */ |
132 | char *fullpath; /* Full path of binary */ | |
0475f8fa | 133 | int (*core_dump)(int, CPUArchState *); |
84778508 BS |
134 | }; |
135 | ||
136 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); | |
137 | abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, | |
ffa03665 | 138 | abi_ulong stringp); |
036a013f | 139 | int loader_exec(const char *filename, char **argv, char **envp, |
d37853f9 WL |
140 | struct target_pt_regs *regs, struct image_info *infop, |
141 | struct bsd_binprm *bprm); | |
84778508 | 142 | |
afcbcff8 | 143 | int load_elf_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 144 | struct image_info *info); |
afcbcff8 | 145 | int load_flt_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 146 | struct image_info *info); |
0475f8fa | 147 | int is_target_elf_binary(int fd); |
84778508 BS |
148 | |
149 | abi_long memcpy_to_target(abi_ulong dest, const void *src, | |
150 | unsigned long len); | |
151 | void target_set_brk(abi_ulong new_brk); | |
152 | abi_long do_brk(abi_ulong new_brk); | |
153 | void syscall_init(void); | |
154 | abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, | |
155 | abi_long arg2, abi_long arg3, abi_long arg4, | |
78cfb07f JL |
156 | abi_long arg5, abi_long arg6, abi_long arg7, |
157 | abi_long arg8); | |
84778508 BS |
158 | abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, |
159 | abi_long arg2, abi_long arg3, abi_long arg4, | |
160 | abi_long arg5, abi_long arg6); | |
161 | abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, | |
162 | abi_long arg2, abi_long arg3, abi_long arg4, | |
163 | abi_long arg5, abi_long arg6); | |
e5924d89 | 164 | void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); |
d42df502 | 165 | extern __thread CPUState *thread_cpu; |
9349b4f9 | 166 | void cpu_loop(CPUArchState *env); |
84778508 BS |
167 | char *target_strerror(int err); |
168 | int get_osversion(void); | |
169 | void fork_start(void); | |
170 | void fork_end(int child); | |
171 | ||
1de7afc9 | 172 | #include "qemu/log.h" |
84778508 BS |
173 | |
174 | /* strace.c */ | |
88dae46d SB |
175 | struct syscallname { |
176 | int nr; | |
177 | const char *name; | |
178 | const char *format; | |
179 | void (*call)(const struct syscallname *, | |
180 | abi_long, abi_long, abi_long, | |
181 | abi_long, abi_long, abi_long); | |
182 | void (*result)(const struct syscallname *, abi_long); | |
183 | }; | |
184 | ||
84778508 BS |
185 | void |
186 | print_freebsd_syscall(int num, | |
187 | abi_long arg1, abi_long arg2, abi_long arg3, | |
188 | abi_long arg4, abi_long arg5, abi_long arg6); | |
189 | void print_freebsd_syscall_ret(int num, abi_long ret); | |
190 | void | |
191 | print_netbsd_syscall(int num, | |
192 | abi_long arg1, abi_long arg2, abi_long arg3, | |
193 | abi_long arg4, abi_long arg5, abi_long arg6); | |
194 | void print_netbsd_syscall_ret(int num, abi_long ret); | |
195 | void | |
196 | print_openbsd_syscall(int num, | |
197 | abi_long arg1, abi_long arg2, abi_long arg3, | |
198 | abi_long arg4, abi_long arg5, abi_long arg6); | |
199 | void print_openbsd_syscall_ret(int num, abi_long ret); | |
200 | extern int do_strace; | |
201 | ||
202 | /* signal.c */ | |
9349b4f9 | 203 | void process_pending_signals(CPUArchState *cpu_env); |
84778508 | 204 | void signal_init(void); |
9349b4f9 AF |
205 | long do_sigreturn(CPUArchState *env); |
206 | long do_rt_sigreturn(CPUArchState *env); | |
5abfac27 | 207 | void queue_signal(CPUArchState *env, int sig, target_siginfo_t *info); |
84778508 BS |
208 | abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); |
209 | ||
210 | /* mmap.c */ | |
211 | int target_mprotect(abi_ulong start, abi_ulong len, int prot); | |
212 | abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, | |
be04f210 | 213 | int flags, int fd, off_t offset); |
84778508 BS |
214 | int target_munmap(abi_ulong start, abi_ulong len); |
215 | abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, | |
216 | abi_ulong new_size, unsigned long flags, | |
217 | abi_ulong new_addr); | |
218 | int target_msync(abi_ulong start, abi_ulong len, int flags); | |
219 | extern unsigned long last_brk; | |
be04f210 WL |
220 | extern abi_ulong mmap_next_start; |
221 | abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size); | |
84778508 BS |
222 | void mmap_fork_start(void); |
223 | void mmap_fork_end(int child); | |
84778508 | 224 | |
28e738dc | 225 | /* main.c */ |
01a298a5 | 226 | extern char qemu_proc_pathname[]; |
312a0b1c WL |
227 | extern unsigned long target_maxtsiz; |
228 | extern unsigned long target_dfldsiz; | |
229 | extern unsigned long target_maxdsiz; | |
230 | extern unsigned long target_dflssiz; | |
231 | extern unsigned long target_maxssiz; | |
232 | extern unsigned long target_sgrowsiz; | |
28e738dc | 233 | |
e5f674f0 WL |
234 | /* syscall.c */ |
235 | abi_long get_errno(abi_long ret); | |
236 | bool is_error(abi_long ret); | |
237 | ||
da07e694 WL |
238 | /* os-sys.c */ |
239 | abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2); | |
240 | ||
84778508 BS |
241 | /* user access */ |
242 | ||
1720751f RH |
243 | #define VERIFY_READ PAGE_READ |
244 | #define VERIFY_WRITE (PAGE_READ | PAGE_WRITE) | |
84778508 | 245 | |
1720751f | 246 | static inline bool access_ok(int type, abi_ulong addr, abi_ulong size) |
84778508 | 247 | { |
1720751f | 248 | return page_check_range((target_ulong)addr, size, type) == 0; |
84778508 BS |
249 | } |
250 | ||
c2bdd9a1 WL |
251 | /* |
252 | * NOTE __get_user and __put_user use host pointers and don't check access. | |
253 | * | |
254 | * These are usually used to access struct data members once the struct has been | |
255 | * locked - usually with lock_user_struct(). | |
84778508 BS |
256 | */ |
257 | #define __put_user(x, hptr)\ | |
258 | ({\ | |
259 | int size = sizeof(*hptr);\ | |
cefbade1 | 260 | switch (size) {\ |
84778508 BS |
261 | case 1:\ |
262 | *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ | |
263 | break;\ | |
264 | case 2:\ | |
265 | *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ | |
266 | break;\ | |
267 | case 4:\ | |
268 | *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ | |
269 | break;\ | |
270 | case 8:\ | |
271 | *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ | |
272 | break;\ | |
273 | default:\ | |
274 | abort();\ | |
036a013f | 275 | } \ |
84778508 BS |
276 | 0;\ |
277 | }) | |
278 | ||
279 | #define __get_user(x, hptr) \ | |
280 | ({\ | |
281 | int size = sizeof(*hptr);\ | |
cefbade1 | 282 | switch (size) {\ |
84778508 BS |
283 | case 1:\ |
284 | x = (typeof(*hptr))*(uint8_t *)(hptr);\ | |
285 | break;\ | |
286 | case 2:\ | |
287 | x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ | |
288 | break;\ | |
289 | case 4:\ | |
290 | x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ | |
291 | break;\ | |
292 | case 8:\ | |
293 | x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ | |
294 | break;\ | |
295 | default:\ | |
84778508 BS |
296 | x = 0;\ |
297 | abort();\ | |
036a013f | 298 | } \ |
84778508 BS |
299 | 0;\ |
300 | }) | |
301 | ||
c2bdd9a1 WL |
302 | /* |
303 | * put_user()/get_user() take a guest address and check access | |
304 | * | |
305 | * These are usually used to access an atomic data type, such as an int, that | |
306 | * has been passed by address. These internally perform locking and unlocking | |
307 | * on the data type. | |
84778508 BS |
308 | */ |
309 | #define put_user(x, gaddr, target_type) \ | |
310 | ({ \ | |
311 | abi_ulong __gaddr = (gaddr); \ | |
312 | target_type *__hptr; \ | |
313 | abi_long __ret; \ | |
33066934 WL |
314 | __hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0); \ |
315 | if (__hptr) { \ | |
84778508 BS |
316 | __ret = __put_user((x), __hptr); \ |
317 | unlock_user(__hptr, __gaddr, sizeof(target_type)); \ | |
318 | } else \ | |
319 | __ret = -TARGET_EFAULT; \ | |
320 | __ret; \ | |
321 | }) | |
322 | ||
323 | #define get_user(x, gaddr, target_type) \ | |
324 | ({ \ | |
325 | abi_ulong __gaddr = (gaddr); \ | |
326 | target_type *__hptr; \ | |
327 | abi_long __ret; \ | |
33066934 WL |
328 | __hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1); \ |
329 | if (__hptr) { \ | |
84778508 BS |
330 | __ret = __get_user((x), __hptr); \ |
331 | unlock_user(__hptr, __gaddr, 0); \ | |
332 | } else { \ | |
84778508 BS |
333 | (x) = 0; \ |
334 | __ret = -TARGET_EFAULT; \ | |
335 | } \ | |
336 | __ret; \ | |
337 | }) | |
338 | ||
339 | #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) | |
340 | #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) | |
341 | #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) | |
342 | #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) | |
343 | #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) | |
344 | #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) | |
345 | #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) | |
346 | #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) | |
347 | #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) | |
348 | #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) | |
349 | ||
350 | #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) | |
351 | #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) | |
352 | #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) | |
353 | #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) | |
354 | #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) | |
355 | #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) | |
356 | #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) | |
357 | #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) | |
358 | #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) | |
359 | #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) | |
360 | ||
c2bdd9a1 WL |
361 | /* |
362 | * copy_from_user() and copy_to_user() are usually used to copy data | |
84778508 BS |
363 | * buffers between the target and host. These internally perform |
364 | * locking/unlocking of the memory. | |
365 | */ | |
366 | abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); | |
367 | abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); | |
368 | ||
c2bdd9a1 WL |
369 | /* |
370 | * Functions for accessing guest memory. The tget and tput functions | |
371 | * read/write single values, byteswapping as necessary. The lock_user function | |
372 | * gets a pointer to a contiguous area of guest memory, but does not perform | |
373 | * any byteswapping. lock_user may return either a pointer to the guest | |
374 | * memory, or a temporary buffer. | |
375 | */ | |
84778508 | 376 | |
c2bdd9a1 WL |
377 | /* |
378 | * Lock an area of guest memory into the host. If copy is true then the | |
379 | * host area will have the same contents as the guest. | |
380 | */ | |
381 | static inline void *lock_user(int type, abi_ulong guest_addr, long len, | |
382 | int copy) | |
84778508 | 383 | { |
cb0ea019 | 384 | if (!access_ok(type, guest_addr, len)) { |
84778508 | 385 | return NULL; |
cb0ea019 | 386 | } |
84778508 BS |
387 | #ifdef DEBUG_REMAP |
388 | { | |
389 | void *addr; | |
fd9a3048 | 390 | addr = g_malloc(len); |
cb0ea019 | 391 | if (copy) { |
3e8f1628 | 392 | memcpy(addr, g2h_untagged(guest_addr), len); |
cb0ea019 | 393 | } else { |
84778508 | 394 | memset(addr, 0, len); |
cb0ea019 | 395 | } |
84778508 BS |
396 | return addr; |
397 | } | |
398 | #else | |
3e8f1628 | 399 | return g2h_untagged(guest_addr); |
84778508 BS |
400 | #endif |
401 | } | |
402 | ||
c2bdd9a1 WL |
403 | /* |
404 | * Unlock an area of guest memory. The first LEN bytes must be flushed back to | |
405 | * guest memory. host_ptr = NULL is explicitly allowed and does nothing. | |
406 | */ | |
84778508 BS |
407 | static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, |
408 | long len) | |
409 | { | |
410 | ||
411 | #ifdef DEBUG_REMAP | |
cb0ea019 | 412 | if (!host_ptr) { |
84778508 | 413 | return; |
cb0ea019 WL |
414 | } |
415 | if (host_ptr == g2h_untagged(guest_addr)) { | |
84778508 | 416 | return; |
cb0ea019 WL |
417 | } |
418 | if (len > 0) { | |
3e8f1628 | 419 | memcpy(g2h_untagged(guest_addr), host_ptr, len); |
cb0ea019 | 420 | } |
fd9a3048 | 421 | g_free(host_ptr); |
84778508 BS |
422 | #endif |
423 | } | |
424 | ||
c2bdd9a1 WL |
425 | /* |
426 | * Return the length of a string in target memory or -TARGET_EFAULT if access | |
427 | * error. | |
428 | */ | |
84778508 BS |
429 | abi_long target_strlen(abi_ulong gaddr); |
430 | ||
431 | /* Like lock_user but for null terminated strings. */ | |
432 | static inline void *lock_user_string(abi_ulong guest_addr) | |
433 | { | |
434 | abi_long len; | |
435 | len = target_strlen(guest_addr); | |
cb0ea019 | 436 | if (len < 0) { |
84778508 | 437 | return NULL; |
cb0ea019 | 438 | } |
84778508 BS |
439 | return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); |
440 | } | |
441 | ||
41d1af4d | 442 | /* Helper macros for locking/unlocking a target struct. */ |
84778508 BS |
443 | #define lock_user_struct(type, host_ptr, guest_addr, copy) \ |
444 | (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) | |
445 | #define unlock_user_struct(host_ptr, guest_addr, copy) \ | |
446 | unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) | |
447 | ||
84778508 | 448 | #include <pthread.h> |
84778508 BS |
449 | |
450 | #endif /* QEMU_H */ |