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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 | ||
38be620c WL |
88 | struct emulated_sigtable sync_signal; |
89 | /* | |
90 | * TODO: Since we block all signals while returning to the main CPU | |
91 | * loop, this needn't be an array | |
92 | */ | |
84778508 | 93 | struct emulated_sigtable sigtab[TARGET_NSIG]; |
48047225 WL |
94 | /* |
95 | * Nonzero if process_pending_signals() needs to do something (either | |
96 | * handle a pending signal or unblock signals). | |
97 | * This flag is written from a signal handler so should be accessed via | |
98 | * the qatomic_read() and qatomic_set() functions. (It is not accessed | |
99 | * from multiple threads.) | |
100 | */ | |
101 | int signal_pending; | |
6c6d4b56 WL |
102 | /* True if we're leaving a sigsuspend and sigsuspend_mask is valid. */ |
103 | bool in_sigsuspend; | |
149076ad WL |
104 | /* |
105 | * This thread's signal mask, as requested by the guest program. | |
106 | * The actual signal mask of this thread may differ: | |
107 | * + we don't let SIGSEGV and SIGBUS be blocked while running guest code | |
108 | * + sometimes we block all signals to avoid races | |
109 | */ | |
110 | sigset_t signal_mask; | |
6c6d4b56 WL |
111 | /* |
112 | * The signal mask imposed by a guest sigsuspend syscall, if we are | |
113 | * currently in the middle of such a syscall | |
114 | */ | |
115 | sigset_t sigsuspend_mask; | |
84778508 | 116 | |
46f4f76d WL |
117 | /* This thread's sigaltstack, if it has one */ |
118 | struct target_sigaltstack sigaltstack_used; | |
84778508 BS |
119 | } __attribute__((aligned(16))) TaskState; |
120 | ||
653ccec2 | 121 | void stop_all_tasks(void); |
84778508 BS |
122 | extern const char *qemu_uname_release; |
123 | ||
84778508 | 124 | /* |
e5e44263 WL |
125 | * TARGET_ARG_MAX defines the number of bytes allocated for arguments |
126 | * and envelope for the new program. 256k should suffice for a reasonable | |
127 | * maxiumum env+arg in 32-bit environments, bump it up to 512k for !ILP32 | |
128 | * platforms. | |
84778508 | 129 | */ |
e5e44263 WL |
130 | #if TARGET_ABI_BITS > 32 |
131 | #define TARGET_ARG_MAX (512 * KiB) | |
132 | #else | |
133 | #define TARGET_ARG_MAX (256 * KiB) | |
134 | #endif | |
135 | #define MAX_ARG_PAGES (TARGET_ARG_MAX / TARGET_PAGE_SIZE) | |
84778508 BS |
136 | |
137 | /* | |
138 | * This structure is used to hold the arguments that are | |
139 | * used when loading binaries. | |
140 | */ | |
afcbcff8 | 141 | struct bsd_binprm { |
84778508 BS |
142 | char buf[128]; |
143 | void *page[MAX_ARG_PAGES]; | |
144 | abi_ulong p; | |
98b34d35 | 145 | abi_ulong stringp; |
84778508 BS |
146 | int fd; |
147 | int e_uid, e_gid; | |
148 | int argc, envc; | |
149 | char **argv; | |
150 | char **envp; | |
1b50ff64 WL |
151 | char *filename; /* (Given) Name of binary */ |
152 | char *fullpath; /* Full path of binary */ | |
0475f8fa | 153 | int (*core_dump)(int, CPUArchState *); |
84778508 BS |
154 | }; |
155 | ||
156 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); | |
157 | abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, | |
ffa03665 | 158 | abi_ulong stringp); |
036a013f | 159 | int loader_exec(const char *filename, char **argv, char **envp, |
d37853f9 WL |
160 | struct target_pt_regs *regs, struct image_info *infop, |
161 | struct bsd_binprm *bprm); | |
84778508 | 162 | |
afcbcff8 | 163 | int load_elf_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 164 | struct image_info *info); |
afcbcff8 | 165 | int load_flt_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 166 | struct image_info *info); |
0475f8fa | 167 | int is_target_elf_binary(int fd); |
84778508 BS |
168 | |
169 | abi_long memcpy_to_target(abi_ulong dest, const void *src, | |
170 | unsigned long len); | |
171 | void target_set_brk(abi_ulong new_brk); | |
172 | abi_long do_brk(abi_ulong new_brk); | |
173 | void syscall_init(void); | |
174 | abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, | |
175 | abi_long arg2, abi_long arg3, abi_long arg4, | |
78cfb07f JL |
176 | abi_long arg5, abi_long arg6, abi_long arg7, |
177 | abi_long arg8); | |
84778508 BS |
178 | abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, |
179 | abi_long arg2, abi_long arg3, abi_long arg4, | |
180 | abi_long arg5, abi_long arg6); | |
181 | abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, | |
182 | abi_long arg2, abi_long arg3, abi_long arg4, | |
183 | abi_long arg5, abi_long arg6); | |
e5924d89 | 184 | void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); |
d42df502 | 185 | extern __thread CPUState *thread_cpu; |
9349b4f9 | 186 | void cpu_loop(CPUArchState *env); |
84778508 BS |
187 | char *target_strerror(int err); |
188 | int get_osversion(void); | |
189 | void fork_start(void); | |
190 | void fork_end(int child); | |
191 | ||
1de7afc9 | 192 | #include "qemu/log.h" |
84778508 BS |
193 | |
194 | /* strace.c */ | |
88dae46d SB |
195 | struct syscallname { |
196 | int nr; | |
197 | const char *name; | |
198 | const char *format; | |
199 | void (*call)(const struct syscallname *, | |
200 | abi_long, abi_long, abi_long, | |
201 | abi_long, abi_long, abi_long); | |
202 | void (*result)(const struct syscallname *, abi_long); | |
203 | }; | |
204 | ||
84778508 BS |
205 | void |
206 | print_freebsd_syscall(int num, | |
207 | abi_long arg1, abi_long arg2, abi_long arg3, | |
208 | abi_long arg4, abi_long arg5, abi_long arg6); | |
209 | void print_freebsd_syscall_ret(int num, abi_long ret); | |
210 | void | |
211 | print_netbsd_syscall(int num, | |
212 | abi_long arg1, abi_long arg2, abi_long arg3, | |
213 | abi_long arg4, abi_long arg5, abi_long arg6); | |
214 | void print_netbsd_syscall_ret(int num, abi_long ret); | |
215 | void | |
216 | print_openbsd_syscall(int num, | |
217 | abi_long arg1, abi_long arg2, abi_long arg3, | |
218 | abi_long arg4, abi_long arg5, abi_long arg6); | |
219 | void print_openbsd_syscall_ret(int num, abi_long ret); | |
fd5bec9a WL |
220 | /** |
221 | * print_taken_signal: | |
222 | * @target_signum: target signal being taken | |
223 | * @tinfo: target_siginfo_t which will be passed to the guest for the signal | |
224 | * | |
225 | * Print strace output indicating that this signal is being taken by the guest, | |
226 | * in a format similar to: | |
227 | * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} --- | |
228 | */ | |
229 | void print_taken_signal(int target_signum, const target_siginfo_t *tinfo); | |
84778508 BS |
230 | extern int do_strace; |
231 | ||
84778508 BS |
232 | /* mmap.c */ |
233 | int target_mprotect(abi_ulong start, abi_ulong len, int prot); | |
234 | abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, | |
be04f210 | 235 | int flags, int fd, off_t offset); |
84778508 BS |
236 | int target_munmap(abi_ulong start, abi_ulong len); |
237 | abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, | |
238 | abi_ulong new_size, unsigned long flags, | |
239 | abi_ulong new_addr); | |
240 | int target_msync(abi_ulong start, abi_ulong len, int flags); | |
241 | extern unsigned long last_brk; | |
be04f210 WL |
242 | extern abi_ulong mmap_next_start; |
243 | abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size); | |
84778508 BS |
244 | void mmap_fork_start(void); |
245 | void mmap_fork_end(int child); | |
84778508 | 246 | |
28e738dc | 247 | /* main.c */ |
01a298a5 | 248 | extern char qemu_proc_pathname[]; |
312a0b1c WL |
249 | extern unsigned long target_maxtsiz; |
250 | extern unsigned long target_dfldsiz; | |
251 | extern unsigned long target_maxdsiz; | |
252 | extern unsigned long target_dflssiz; | |
253 | extern unsigned long target_maxssiz; | |
254 | extern unsigned long target_sgrowsiz; | |
28e738dc | 255 | |
e5f674f0 WL |
256 | /* syscall.c */ |
257 | abi_long get_errno(abi_long ret); | |
258 | bool is_error(abi_long ret); | |
259 | ||
da07e694 WL |
260 | /* os-sys.c */ |
261 | abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2); | |
262 | ||
84778508 BS |
263 | /* user access */ |
264 | ||
1720751f RH |
265 | #define VERIFY_READ PAGE_READ |
266 | #define VERIFY_WRITE (PAGE_READ | PAGE_WRITE) | |
84778508 | 267 | |
1720751f | 268 | static inline bool access_ok(int type, abi_ulong addr, abi_ulong size) |
84778508 | 269 | { |
1720751f | 270 | return page_check_range((target_ulong)addr, size, type) == 0; |
84778508 BS |
271 | } |
272 | ||
c2bdd9a1 WL |
273 | /* |
274 | * NOTE __get_user and __put_user use host pointers and don't check access. | |
275 | * | |
276 | * These are usually used to access struct data members once the struct has been | |
277 | * locked - usually with lock_user_struct(). | |
84778508 BS |
278 | */ |
279 | #define __put_user(x, hptr)\ | |
280 | ({\ | |
281 | int size = sizeof(*hptr);\ | |
cefbade1 | 282 | switch (size) {\ |
84778508 BS |
283 | case 1:\ |
284 | *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ | |
285 | break;\ | |
286 | case 2:\ | |
287 | *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ | |
288 | break;\ | |
289 | case 4:\ | |
290 | *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ | |
291 | break;\ | |
292 | case 8:\ | |
293 | *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ | |
294 | break;\ | |
295 | default:\ | |
296 | abort();\ | |
036a013f | 297 | } \ |
84778508 BS |
298 | 0;\ |
299 | }) | |
300 | ||
301 | #define __get_user(x, hptr) \ | |
302 | ({\ | |
303 | int size = sizeof(*hptr);\ | |
cefbade1 | 304 | switch (size) {\ |
84778508 BS |
305 | case 1:\ |
306 | x = (typeof(*hptr))*(uint8_t *)(hptr);\ | |
307 | break;\ | |
308 | case 2:\ | |
309 | x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ | |
310 | break;\ | |
311 | case 4:\ | |
312 | x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ | |
313 | break;\ | |
314 | case 8:\ | |
315 | x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ | |
316 | break;\ | |
317 | default:\ | |
84778508 BS |
318 | x = 0;\ |
319 | abort();\ | |
036a013f | 320 | } \ |
84778508 BS |
321 | 0;\ |
322 | }) | |
323 | ||
c2bdd9a1 WL |
324 | /* |
325 | * put_user()/get_user() take a guest address and check access | |
326 | * | |
327 | * These are usually used to access an atomic data type, such as an int, that | |
328 | * has been passed by address. These internally perform locking and unlocking | |
329 | * on the data type. | |
84778508 BS |
330 | */ |
331 | #define put_user(x, gaddr, target_type) \ | |
332 | ({ \ | |
333 | abi_ulong __gaddr = (gaddr); \ | |
334 | target_type *__hptr; \ | |
335 | abi_long __ret; \ | |
33066934 WL |
336 | __hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0); \ |
337 | if (__hptr) { \ | |
84778508 BS |
338 | __ret = __put_user((x), __hptr); \ |
339 | unlock_user(__hptr, __gaddr, sizeof(target_type)); \ | |
340 | } else \ | |
341 | __ret = -TARGET_EFAULT; \ | |
342 | __ret; \ | |
343 | }) | |
344 | ||
345 | #define get_user(x, gaddr, target_type) \ | |
346 | ({ \ | |
347 | abi_ulong __gaddr = (gaddr); \ | |
348 | target_type *__hptr; \ | |
349 | abi_long __ret; \ | |
33066934 WL |
350 | __hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1); \ |
351 | if (__hptr) { \ | |
84778508 BS |
352 | __ret = __get_user((x), __hptr); \ |
353 | unlock_user(__hptr, __gaddr, 0); \ | |
354 | } else { \ | |
84778508 BS |
355 | (x) = 0; \ |
356 | __ret = -TARGET_EFAULT; \ | |
357 | } \ | |
358 | __ret; \ | |
359 | }) | |
360 | ||
361 | #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) | |
362 | #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) | |
363 | #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) | |
364 | #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) | |
365 | #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) | |
366 | #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) | |
367 | #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) | |
368 | #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) | |
369 | #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) | |
370 | #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) | |
371 | ||
372 | #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) | |
373 | #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) | |
374 | #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) | |
375 | #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) | |
376 | #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) | |
377 | #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) | |
378 | #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) | |
379 | #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) | |
380 | #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) | |
381 | #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) | |
382 | ||
c2bdd9a1 WL |
383 | /* |
384 | * copy_from_user() and copy_to_user() are usually used to copy data | |
84778508 BS |
385 | * buffers between the target and host. These internally perform |
386 | * locking/unlocking of the memory. | |
387 | */ | |
388 | abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); | |
389 | abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); | |
390 | ||
c2bdd9a1 WL |
391 | /* |
392 | * Functions for accessing guest memory. The tget and tput functions | |
393 | * read/write single values, byteswapping as necessary. The lock_user function | |
394 | * gets a pointer to a contiguous area of guest memory, but does not perform | |
395 | * any byteswapping. lock_user may return either a pointer to the guest | |
396 | * memory, or a temporary buffer. | |
397 | */ | |
84778508 | 398 | |
c2bdd9a1 WL |
399 | /* |
400 | * Lock an area of guest memory into the host. If copy is true then the | |
401 | * host area will have the same contents as the guest. | |
402 | */ | |
403 | static inline void *lock_user(int type, abi_ulong guest_addr, long len, | |
404 | int copy) | |
84778508 | 405 | { |
cb0ea019 | 406 | if (!access_ok(type, guest_addr, len)) { |
84778508 | 407 | return NULL; |
cb0ea019 | 408 | } |
84778508 BS |
409 | #ifdef DEBUG_REMAP |
410 | { | |
411 | void *addr; | |
fd9a3048 | 412 | addr = g_malloc(len); |
cb0ea019 | 413 | if (copy) { |
3e8f1628 | 414 | memcpy(addr, g2h_untagged(guest_addr), len); |
cb0ea019 | 415 | } else { |
84778508 | 416 | memset(addr, 0, len); |
cb0ea019 | 417 | } |
84778508 BS |
418 | return addr; |
419 | } | |
420 | #else | |
3e8f1628 | 421 | return g2h_untagged(guest_addr); |
84778508 BS |
422 | #endif |
423 | } | |
424 | ||
c2bdd9a1 WL |
425 | /* |
426 | * Unlock an area of guest memory. The first LEN bytes must be flushed back to | |
427 | * guest memory. host_ptr = NULL is explicitly allowed and does nothing. | |
428 | */ | |
84778508 BS |
429 | static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, |
430 | long len) | |
431 | { | |
432 | ||
433 | #ifdef DEBUG_REMAP | |
cb0ea019 | 434 | if (!host_ptr) { |
84778508 | 435 | return; |
cb0ea019 WL |
436 | } |
437 | if (host_ptr == g2h_untagged(guest_addr)) { | |
84778508 | 438 | return; |
cb0ea019 WL |
439 | } |
440 | if (len > 0) { | |
3e8f1628 | 441 | memcpy(g2h_untagged(guest_addr), host_ptr, len); |
cb0ea019 | 442 | } |
fd9a3048 | 443 | g_free(host_ptr); |
84778508 BS |
444 | #endif |
445 | } | |
446 | ||
c2bdd9a1 WL |
447 | /* |
448 | * Return the length of a string in target memory or -TARGET_EFAULT if access | |
449 | * error. | |
450 | */ | |
84778508 BS |
451 | abi_long target_strlen(abi_ulong gaddr); |
452 | ||
453 | /* Like lock_user but for null terminated strings. */ | |
454 | static inline void *lock_user_string(abi_ulong guest_addr) | |
455 | { | |
456 | abi_long len; | |
457 | len = target_strlen(guest_addr); | |
cb0ea019 | 458 | if (len < 0) { |
84778508 | 459 | return NULL; |
cb0ea019 | 460 | } |
84778508 BS |
461 | return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); |
462 | } | |
463 | ||
41d1af4d | 464 | /* Helper macros for locking/unlocking a target struct. */ |
84778508 BS |
465 | #define lock_user_struct(type, host_ptr, guest_addr, copy) \ |
466 | (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) | |
467 | #define unlock_user_struct(host_ptr, guest_addr, copy) \ | |
468 | unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) | |
469 | ||
84778508 | 470 | #include <pthread.h> |
84778508 | 471 | |
aae57ac3 WL |
472 | #include "user/safe-syscall.h" |
473 | ||
84778508 | 474 | #endif /* QEMU_H */ |