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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; | |
149076ad WL |
97 | /* |
98 | * This thread's signal mask, as requested by the guest program. | |
99 | * The actual signal mask of this thread may differ: | |
100 | * + we don't let SIGSEGV and SIGBUS be blocked while running guest code | |
101 | * + sometimes we block all signals to avoid races | |
102 | */ | |
103 | sigset_t signal_mask; | |
84778508 | 104 | |
f7795e40 | 105 | uint8_t stack[]; |
84778508 BS |
106 | } __attribute__((aligned(16))) TaskState; |
107 | ||
653ccec2 | 108 | void stop_all_tasks(void); |
84778508 BS |
109 | extern const char *qemu_uname_release; |
110 | ||
84778508 | 111 | /* |
e5e44263 WL |
112 | * TARGET_ARG_MAX defines the number of bytes allocated for arguments |
113 | * and envelope for the new program. 256k should suffice for a reasonable | |
114 | * maxiumum env+arg in 32-bit environments, bump it up to 512k for !ILP32 | |
115 | * platforms. | |
84778508 | 116 | */ |
e5e44263 WL |
117 | #if TARGET_ABI_BITS > 32 |
118 | #define TARGET_ARG_MAX (512 * KiB) | |
119 | #else | |
120 | #define TARGET_ARG_MAX (256 * KiB) | |
121 | #endif | |
122 | #define MAX_ARG_PAGES (TARGET_ARG_MAX / TARGET_PAGE_SIZE) | |
84778508 BS |
123 | |
124 | /* | |
125 | * This structure is used to hold the arguments that are | |
126 | * used when loading binaries. | |
127 | */ | |
afcbcff8 | 128 | struct bsd_binprm { |
84778508 BS |
129 | char buf[128]; |
130 | void *page[MAX_ARG_PAGES]; | |
131 | abi_ulong p; | |
98b34d35 | 132 | abi_ulong stringp; |
84778508 BS |
133 | int fd; |
134 | int e_uid, e_gid; | |
135 | int argc, envc; | |
136 | char **argv; | |
137 | char **envp; | |
1b50ff64 WL |
138 | char *filename; /* (Given) Name of binary */ |
139 | char *fullpath; /* Full path of binary */ | |
0475f8fa | 140 | int (*core_dump)(int, CPUArchState *); |
84778508 BS |
141 | }; |
142 | ||
143 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); | |
144 | abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, | |
ffa03665 | 145 | abi_ulong stringp); |
036a013f | 146 | int loader_exec(const char *filename, char **argv, char **envp, |
d37853f9 WL |
147 | struct target_pt_regs *regs, struct image_info *infop, |
148 | struct bsd_binprm *bprm); | |
84778508 | 149 | |
afcbcff8 | 150 | int load_elf_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 151 | struct image_info *info); |
afcbcff8 | 152 | int load_flt_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 153 | struct image_info *info); |
0475f8fa | 154 | int is_target_elf_binary(int fd); |
84778508 BS |
155 | |
156 | abi_long memcpy_to_target(abi_ulong dest, const void *src, | |
157 | unsigned long len); | |
158 | void target_set_brk(abi_ulong new_brk); | |
159 | abi_long do_brk(abi_ulong new_brk); | |
160 | void syscall_init(void); | |
161 | abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, | |
162 | abi_long arg2, abi_long arg3, abi_long arg4, | |
78cfb07f JL |
163 | abi_long arg5, abi_long arg6, abi_long arg7, |
164 | abi_long arg8); | |
84778508 BS |
165 | abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, |
166 | abi_long arg2, abi_long arg3, abi_long arg4, | |
167 | abi_long arg5, abi_long arg6); | |
168 | abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, | |
169 | abi_long arg2, abi_long arg3, abi_long arg4, | |
170 | abi_long arg5, abi_long arg6); | |
e5924d89 | 171 | void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); |
d42df502 | 172 | extern __thread CPUState *thread_cpu; |
9349b4f9 | 173 | void cpu_loop(CPUArchState *env); |
84778508 BS |
174 | char *target_strerror(int err); |
175 | int get_osversion(void); | |
176 | void fork_start(void); | |
177 | void fork_end(int child); | |
178 | ||
1de7afc9 | 179 | #include "qemu/log.h" |
84778508 BS |
180 | |
181 | /* strace.c */ | |
88dae46d SB |
182 | struct syscallname { |
183 | int nr; | |
184 | const char *name; | |
185 | const char *format; | |
186 | void (*call)(const struct syscallname *, | |
187 | abi_long, abi_long, abi_long, | |
188 | abi_long, abi_long, abi_long); | |
189 | void (*result)(const struct syscallname *, abi_long); | |
190 | }; | |
191 | ||
84778508 BS |
192 | void |
193 | print_freebsd_syscall(int num, | |
194 | abi_long arg1, abi_long arg2, abi_long arg3, | |
195 | abi_long arg4, abi_long arg5, abi_long arg6); | |
196 | void print_freebsd_syscall_ret(int num, abi_long ret); | |
197 | void | |
198 | print_netbsd_syscall(int num, | |
199 | abi_long arg1, abi_long arg2, abi_long arg3, | |
200 | abi_long arg4, abi_long arg5, abi_long arg6); | |
201 | void print_netbsd_syscall_ret(int num, abi_long ret); | |
202 | void | |
203 | print_openbsd_syscall(int num, | |
204 | abi_long arg1, abi_long arg2, abi_long arg3, | |
205 | abi_long arg4, abi_long arg5, abi_long arg6); | |
206 | void print_openbsd_syscall_ret(int num, abi_long ret); | |
207 | extern int do_strace; | |
208 | ||
84778508 BS |
209 | /* mmap.c */ |
210 | int target_mprotect(abi_ulong start, abi_ulong len, int prot); | |
211 | abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, | |
be04f210 | 212 | int flags, int fd, off_t offset); |
84778508 BS |
213 | int target_munmap(abi_ulong start, abi_ulong len); |
214 | abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, | |
215 | abi_ulong new_size, unsigned long flags, | |
216 | abi_ulong new_addr); | |
217 | int target_msync(abi_ulong start, abi_ulong len, int flags); | |
218 | extern unsigned long last_brk; | |
be04f210 WL |
219 | extern abi_ulong mmap_next_start; |
220 | abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size); | |
84778508 BS |
221 | void mmap_fork_start(void); |
222 | void mmap_fork_end(int child); | |
84778508 | 223 | |
28e738dc | 224 | /* main.c */ |
01a298a5 | 225 | extern char qemu_proc_pathname[]; |
312a0b1c WL |
226 | extern unsigned long target_maxtsiz; |
227 | extern unsigned long target_dfldsiz; | |
228 | extern unsigned long target_maxdsiz; | |
229 | extern unsigned long target_dflssiz; | |
230 | extern unsigned long target_maxssiz; | |
231 | extern unsigned long target_sgrowsiz; | |
28e738dc | 232 | |
e5f674f0 WL |
233 | /* syscall.c */ |
234 | abi_long get_errno(abi_long ret); | |
235 | bool is_error(abi_long ret); | |
236 | ||
da07e694 WL |
237 | /* os-sys.c */ |
238 | abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2); | |
239 | ||
84778508 BS |
240 | /* user access */ |
241 | ||
1720751f RH |
242 | #define VERIFY_READ PAGE_READ |
243 | #define VERIFY_WRITE (PAGE_READ | PAGE_WRITE) | |
84778508 | 244 | |
1720751f | 245 | static inline bool access_ok(int type, abi_ulong addr, abi_ulong size) |
84778508 | 246 | { |
1720751f | 247 | return page_check_range((target_ulong)addr, size, type) == 0; |
84778508 BS |
248 | } |
249 | ||
c2bdd9a1 WL |
250 | /* |
251 | * NOTE __get_user and __put_user use host pointers and don't check access. | |
252 | * | |
253 | * These are usually used to access struct data members once the struct has been | |
254 | * locked - usually with lock_user_struct(). | |
84778508 BS |
255 | */ |
256 | #define __put_user(x, hptr)\ | |
257 | ({\ | |
258 | int size = sizeof(*hptr);\ | |
cefbade1 | 259 | switch (size) {\ |
84778508 BS |
260 | case 1:\ |
261 | *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ | |
262 | break;\ | |
263 | case 2:\ | |
264 | *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ | |
265 | break;\ | |
266 | case 4:\ | |
267 | *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ | |
268 | break;\ | |
269 | case 8:\ | |
270 | *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ | |
271 | break;\ | |
272 | default:\ | |
273 | abort();\ | |
036a013f | 274 | } \ |
84778508 BS |
275 | 0;\ |
276 | }) | |
277 | ||
278 | #define __get_user(x, hptr) \ | |
279 | ({\ | |
280 | int size = sizeof(*hptr);\ | |
cefbade1 | 281 | switch (size) {\ |
84778508 BS |
282 | case 1:\ |
283 | x = (typeof(*hptr))*(uint8_t *)(hptr);\ | |
284 | break;\ | |
285 | case 2:\ | |
286 | x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ | |
287 | break;\ | |
288 | case 4:\ | |
289 | x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ | |
290 | break;\ | |
291 | case 8:\ | |
292 | x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ | |
293 | break;\ | |
294 | default:\ | |
84778508 BS |
295 | x = 0;\ |
296 | abort();\ | |
036a013f | 297 | } \ |
84778508 BS |
298 | 0;\ |
299 | }) | |
300 | ||
c2bdd9a1 WL |
301 | /* |
302 | * put_user()/get_user() take a guest address and check access | |
303 | * | |
304 | * These are usually used to access an atomic data type, such as an int, that | |
305 | * has been passed by address. These internally perform locking and unlocking | |
306 | * on the data type. | |
84778508 BS |
307 | */ |
308 | #define put_user(x, gaddr, target_type) \ | |
309 | ({ \ | |
310 | abi_ulong __gaddr = (gaddr); \ | |
311 | target_type *__hptr; \ | |
312 | abi_long __ret; \ | |
33066934 WL |
313 | __hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0); \ |
314 | if (__hptr) { \ | |
84778508 BS |
315 | __ret = __put_user((x), __hptr); \ |
316 | unlock_user(__hptr, __gaddr, sizeof(target_type)); \ | |
317 | } else \ | |
318 | __ret = -TARGET_EFAULT; \ | |
319 | __ret; \ | |
320 | }) | |
321 | ||
322 | #define get_user(x, gaddr, target_type) \ | |
323 | ({ \ | |
324 | abi_ulong __gaddr = (gaddr); \ | |
325 | target_type *__hptr; \ | |
326 | abi_long __ret; \ | |
33066934 WL |
327 | __hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1); \ |
328 | if (__hptr) { \ | |
84778508 BS |
329 | __ret = __get_user((x), __hptr); \ |
330 | unlock_user(__hptr, __gaddr, 0); \ | |
331 | } else { \ | |
84778508 BS |
332 | (x) = 0; \ |
333 | __ret = -TARGET_EFAULT; \ | |
334 | } \ | |
335 | __ret; \ | |
336 | }) | |
337 | ||
338 | #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) | |
339 | #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) | |
340 | #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) | |
341 | #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) | |
342 | #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) | |
343 | #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) | |
344 | #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) | |
345 | #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) | |
346 | #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) | |
347 | #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) | |
348 | ||
349 | #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) | |
350 | #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) | |
351 | #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) | |
352 | #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) | |
353 | #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) | |
354 | #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) | |
355 | #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) | |
356 | #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) | |
357 | #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) | |
358 | #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) | |
359 | ||
c2bdd9a1 WL |
360 | /* |
361 | * copy_from_user() and copy_to_user() are usually used to copy data | |
84778508 BS |
362 | * buffers between the target and host. These internally perform |
363 | * locking/unlocking of the memory. | |
364 | */ | |
365 | abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); | |
366 | abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); | |
367 | ||
c2bdd9a1 WL |
368 | /* |
369 | * Functions for accessing guest memory. The tget and tput functions | |
370 | * read/write single values, byteswapping as necessary. The lock_user function | |
371 | * gets a pointer to a contiguous area of guest memory, but does not perform | |
372 | * any byteswapping. lock_user may return either a pointer to the guest | |
373 | * memory, or a temporary buffer. | |
374 | */ | |
84778508 | 375 | |
c2bdd9a1 WL |
376 | /* |
377 | * Lock an area of guest memory into the host. If copy is true then the | |
378 | * host area will have the same contents as the guest. | |
379 | */ | |
380 | static inline void *lock_user(int type, abi_ulong guest_addr, long len, | |
381 | int copy) | |
84778508 | 382 | { |
cb0ea019 | 383 | if (!access_ok(type, guest_addr, len)) { |
84778508 | 384 | return NULL; |
cb0ea019 | 385 | } |
84778508 BS |
386 | #ifdef DEBUG_REMAP |
387 | { | |
388 | void *addr; | |
fd9a3048 | 389 | addr = g_malloc(len); |
cb0ea019 | 390 | if (copy) { |
3e8f1628 | 391 | memcpy(addr, g2h_untagged(guest_addr), len); |
cb0ea019 | 392 | } else { |
84778508 | 393 | memset(addr, 0, len); |
cb0ea019 | 394 | } |
84778508 BS |
395 | return addr; |
396 | } | |
397 | #else | |
3e8f1628 | 398 | return g2h_untagged(guest_addr); |
84778508 BS |
399 | #endif |
400 | } | |
401 | ||
c2bdd9a1 WL |
402 | /* |
403 | * Unlock an area of guest memory. The first LEN bytes must be flushed back to | |
404 | * guest memory. host_ptr = NULL is explicitly allowed and does nothing. | |
405 | */ | |
84778508 BS |
406 | static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, |
407 | long len) | |
408 | { | |
409 | ||
410 | #ifdef DEBUG_REMAP | |
cb0ea019 | 411 | if (!host_ptr) { |
84778508 | 412 | return; |
cb0ea019 WL |
413 | } |
414 | if (host_ptr == g2h_untagged(guest_addr)) { | |
84778508 | 415 | return; |
cb0ea019 WL |
416 | } |
417 | if (len > 0) { | |
3e8f1628 | 418 | memcpy(g2h_untagged(guest_addr), host_ptr, len); |
cb0ea019 | 419 | } |
fd9a3048 | 420 | g_free(host_ptr); |
84778508 BS |
421 | #endif |
422 | } | |
423 | ||
c2bdd9a1 WL |
424 | /* |
425 | * Return the length of a string in target memory or -TARGET_EFAULT if access | |
426 | * error. | |
427 | */ | |
84778508 BS |
428 | abi_long target_strlen(abi_ulong gaddr); |
429 | ||
430 | /* Like lock_user but for null terminated strings. */ | |
431 | static inline void *lock_user_string(abi_ulong guest_addr) | |
432 | { | |
433 | abi_long len; | |
434 | len = target_strlen(guest_addr); | |
cb0ea019 | 435 | if (len < 0) { |
84778508 | 436 | return NULL; |
cb0ea019 | 437 | } |
84778508 BS |
438 | return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); |
439 | } | |
440 | ||
41d1af4d | 441 | /* Helper macros for locking/unlocking a target struct. */ |
84778508 BS |
442 | #define lock_user_struct(type, host_ptr, guest_addr, copy) \ |
443 | (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) | |
444 | #define unlock_user_struct(host_ptr, guest_addr, copy) \ | |
445 | unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) | |
446 | ||
84778508 | 447 | #include <pthread.h> |
84778508 BS |
448 | |
449 | #endif /* QEMU_H */ |