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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 | 20 | #include "cpu.h" |
e5e44263 | 21 | #include "qemu/units.h" |
f08b6170 | 22 | #include "exec/cpu_ldst.h" |
ab77bd84 | 23 | #include "exec/exec-all.h" |
84778508 BS |
24 | |
25 | #undef DEBUG_REMAP | |
84778508 | 26 | |
022c62cb | 27 | #include "exec/user/abitypes.h" |
84778508 | 28 | |
4b599848 WL |
29 | extern char **environ; |
30 | ||
ab77bd84 WL |
31 | #include "exec/user/thunk.h" |
32 | #include "target_arch.h" | |
84778508 | 33 | #include "syscall_defs.h" |
0c6940d0 | 34 | #include "target_syscall.h" |
82792244 | 35 | #include "target_os_vmparam.h" |
790baacc | 36 | #include "target_os_signal.h" |
647afdf1 | 37 | #include "target.h" |
022c62cb | 38 | #include "exec/gdbstub.h" |
e022d9ca | 39 | #include "qemu/clang-tsa.h" |
84778508 | 40 | |
9b4a902d | 41 | #include "qemu-os.h" |
c2bdd9a1 WL |
42 | /* |
43 | * This struct is used to hold certain information about the image. Basically, | |
44 | * it replicates in user space what would be certain task_struct fields in the | |
45 | * kernel | |
84778508 BS |
46 | */ |
47 | struct image_info { | |
0475f8fa | 48 | abi_ulong load_bias; |
84778508 BS |
49 | abi_ulong load_addr; |
50 | abi_ulong start_code; | |
51 | abi_ulong end_code; | |
52 | abi_ulong start_data; | |
53 | abi_ulong end_data; | |
84778508 | 54 | abi_ulong brk; |
84778508 BS |
55 | abi_ulong rss; |
56 | abi_ulong start_stack; | |
57 | abi_ulong entry; | |
58 | abi_ulong code_offset; | |
59 | abi_ulong data_offset; | |
0475f8fa WL |
60 | abi_ulong arg_start; |
61 | abi_ulong arg_end; | |
62 | uint32_t elf_flags; | |
84778508 BS |
63 | }; |
64 | ||
84778508 BS |
65 | struct emulated_sigtable { |
66 | int pending; /* true if signal is pending */ | |
b46d4ad7 | 67 | target_siginfo_t info; |
84778508 BS |
68 | }; |
69 | ||
c2bdd9a1 WL |
70 | /* |
71 | * NOTE: we force a big alignment so that the stack stored after is aligned too | |
72 | */ | |
84778508 | 73 | typedef struct TaskState { |
bd88c780 AB |
74 | pid_t ts_tid; /* tid (or pid) of this task */ |
75 | ||
84778508 | 76 | struct TaskState *next; |
031fe7af | 77 | struct bsd_binprm *bprm; |
84778508 BS |
78 | struct image_info *info; |
79 | ||
38be620c WL |
80 | struct emulated_sigtable sync_signal; |
81 | /* | |
82 | * TODO: Since we block all signals while returning to the main CPU | |
83 | * loop, this needn't be an array | |
84 | */ | |
84778508 | 85 | struct emulated_sigtable sigtab[TARGET_NSIG]; |
48047225 WL |
86 | /* |
87 | * Nonzero if process_pending_signals() needs to do something (either | |
88 | * handle a pending signal or unblock signals). | |
89 | * This flag is written from a signal handler so should be accessed via | |
90 | * the qatomic_read() and qatomic_set() functions. (It is not accessed | |
91 | * from multiple threads.) | |
92 | */ | |
93 | int signal_pending; | |
6c6d4b56 WL |
94 | /* True if we're leaving a sigsuspend and sigsuspend_mask is valid. */ |
95 | bool in_sigsuspend; | |
149076ad WL |
96 | /* |
97 | * This thread's signal mask, as requested by the guest program. | |
98 | * The actual signal mask of this thread may differ: | |
99 | * + we don't let SIGSEGV and SIGBUS be blocked while running guest code | |
100 | * + sometimes we block all signals to avoid races | |
101 | */ | |
102 | sigset_t signal_mask; | |
6c6d4b56 WL |
103 | /* |
104 | * The signal mask imposed by a guest sigsuspend syscall, if we are | |
105 | * currently in the middle of such a syscall | |
106 | */ | |
107 | sigset_t sigsuspend_mask; | |
84778508 | 108 | |
46f4f76d WL |
109 | /* This thread's sigaltstack, if it has one */ |
110 | struct target_sigaltstack sigaltstack_used; | |
84778508 BS |
111 | } __attribute__((aligned(16))) TaskState; |
112 | ||
653ccec2 | 113 | void stop_all_tasks(void); |
86327290 | 114 | extern const char *interp_prefix; |
84778508 BS |
115 | extern const char *qemu_uname_release; |
116 | ||
84778508 | 117 | /* |
e5e44263 WL |
118 | * TARGET_ARG_MAX defines the number of bytes allocated for arguments |
119 | * and envelope for the new program. 256k should suffice for a reasonable | |
944399ff | 120 | * maximum env+arg in 32-bit environments, bump it up to 512k for !ILP32 |
e5e44263 | 121 | * platforms. |
84778508 | 122 | */ |
e5e44263 WL |
123 | #if TARGET_ABI_BITS > 32 |
124 | #define TARGET_ARG_MAX (512 * KiB) | |
125 | #else | |
126 | #define TARGET_ARG_MAX (256 * KiB) | |
127 | #endif | |
128 | #define MAX_ARG_PAGES (TARGET_ARG_MAX / TARGET_PAGE_SIZE) | |
84778508 BS |
129 | |
130 | /* | |
131 | * This structure is used to hold the arguments that are | |
132 | * used when loading binaries. | |
133 | */ | |
afcbcff8 | 134 | struct bsd_binprm { |
84778508 BS |
135 | char buf[128]; |
136 | void *page[MAX_ARG_PAGES]; | |
137 | abi_ulong p; | |
98b34d35 | 138 | abi_ulong stringp; |
84778508 BS |
139 | int fd; |
140 | int e_uid, e_gid; | |
141 | int argc, envc; | |
142 | char **argv; | |
143 | char **envp; | |
1b50ff64 WL |
144 | char *filename; /* (Given) Name of binary */ |
145 | char *fullpath; /* Full path of binary */ | |
0475f8fa | 146 | int (*core_dump)(int, CPUArchState *); |
84778508 BS |
147 | }; |
148 | ||
149 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); | |
150 | abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, | |
ffa03665 | 151 | abi_ulong stringp); |
036a013f | 152 | int loader_exec(const char *filename, char **argv, char **envp, |
d37853f9 WL |
153 | struct target_pt_regs *regs, struct image_info *infop, |
154 | struct bsd_binprm *bprm); | |
84778508 | 155 | |
afcbcff8 | 156 | int load_elf_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 157 | struct image_info *info); |
afcbcff8 | 158 | int load_flt_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
036a013f | 159 | struct image_info *info); |
0475f8fa | 160 | int is_target_elf_binary(int fd); |
84778508 BS |
161 | |
162 | abi_long memcpy_to_target(abi_ulong dest, const void *src, | |
163 | unsigned long len); | |
164 | void target_set_brk(abi_ulong new_brk); | |
165 | abi_long do_brk(abi_ulong new_brk); | |
166 | void syscall_init(void); | |
167 | abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, | |
168 | abi_long arg2, abi_long arg3, abi_long arg4, | |
78cfb07f JL |
169 | abi_long arg5, abi_long arg6, abi_long arg7, |
170 | abi_long arg8); | |
84778508 BS |
171 | abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, |
172 | abi_long arg2, abi_long arg3, abi_long arg4, | |
173 | abi_long arg5, abi_long arg6); | |
174 | abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, | |
175 | abi_long arg2, abi_long arg3, abi_long arg4, | |
176 | abi_long arg5, abi_long arg6); | |
9edc6313 | 177 | void gemu_log(const char *fmt, ...) G_GNUC_PRINTF(1, 2); |
d42df502 | 178 | extern __thread CPUState *thread_cpu; |
9349b4f9 | 179 | void cpu_loop(CPUArchState *env); |
84778508 BS |
180 | char *target_strerror(int err); |
181 | int get_osversion(void); | |
182 | void fork_start(void); | |
183 | void fork_end(int child); | |
184 | ||
1de7afc9 | 185 | #include "qemu/log.h" |
84778508 BS |
186 | |
187 | /* strace.c */ | |
88dae46d SB |
188 | struct syscallname { |
189 | int nr; | |
190 | const char *name; | |
191 | const char *format; | |
192 | void (*call)(const struct syscallname *, | |
193 | abi_long, abi_long, abi_long, | |
194 | abi_long, abi_long, abi_long); | |
195 | void (*result)(const struct syscallname *, abi_long); | |
196 | }; | |
197 | ||
84778508 BS |
198 | void |
199 | print_freebsd_syscall(int num, | |
200 | abi_long arg1, abi_long arg2, abi_long arg3, | |
201 | abi_long arg4, abi_long arg5, abi_long arg6); | |
202 | void print_freebsd_syscall_ret(int num, abi_long ret); | |
203 | void | |
204 | print_netbsd_syscall(int num, | |
205 | abi_long arg1, abi_long arg2, abi_long arg3, | |
206 | abi_long arg4, abi_long arg5, abi_long arg6); | |
207 | void print_netbsd_syscall_ret(int num, abi_long ret); | |
208 | void | |
209 | print_openbsd_syscall(int num, | |
210 | abi_long arg1, abi_long arg2, abi_long arg3, | |
211 | abi_long arg4, abi_long arg5, abi_long arg6); | |
212 | void print_openbsd_syscall_ret(int num, abi_long ret); | |
fd5bec9a WL |
213 | /** |
214 | * print_taken_signal: | |
215 | * @target_signum: target signal being taken | |
216 | * @tinfo: target_siginfo_t which will be passed to the guest for the signal | |
217 | * | |
218 | * Print strace output indicating that this signal is being taken by the guest, | |
219 | * in a format similar to: | |
220 | * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} --- | |
221 | */ | |
222 | void print_taken_signal(int target_signum, const target_siginfo_t *tinfo); | |
84778508 BS |
223 | extern int do_strace; |
224 | ||
84778508 BS |
225 | /* mmap.c */ |
226 | int target_mprotect(abi_ulong start, abi_ulong len, int prot); | |
227 | abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, | |
be04f210 | 228 | int flags, int fd, off_t offset); |
84778508 BS |
229 | int target_munmap(abi_ulong start, abi_ulong len); |
230 | abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, | |
231 | abi_ulong new_size, unsigned long flags, | |
232 | abi_ulong new_addr); | |
233 | int target_msync(abi_ulong start, abi_ulong len, int flags); | |
be04f210 WL |
234 | extern abi_ulong mmap_next_start; |
235 | abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size); | |
4e00b7d8 | 236 | void mmap_reserve(abi_ulong start, abi_ulong size); |
e022d9ca EGE |
237 | void TSA_NO_TSA mmap_fork_start(void); |
238 | void TSA_NO_TSA mmap_fork_end(int child); | |
84778508 | 239 | |
28e738dc | 240 | /* main.c */ |
01a298a5 | 241 | extern char qemu_proc_pathname[]; |
312a0b1c WL |
242 | extern unsigned long target_maxtsiz; |
243 | extern unsigned long target_dfldsiz; | |
244 | extern unsigned long target_maxdsiz; | |
245 | extern unsigned long target_dflssiz; | |
246 | extern unsigned long target_maxssiz; | |
247 | extern unsigned long target_sgrowsiz; | |
28e738dc | 248 | |
deeff83b | 249 | /* os-syscall.c */ |
e5f674f0 WL |
250 | abi_long get_errno(abi_long ret); |
251 | bool is_error(abi_long ret); | |
deeff83b | 252 | int host_to_target_errno(int err); |
e5f674f0 | 253 | |
cc47390c SS |
254 | /* os-proc.c */ |
255 | abi_long freebsd_exec_common(abi_ulong path_or_fd, abi_ulong guest_argp, | |
256 | abi_ulong guest_envp, int do_fexec); | |
257 | abi_long do_freebsd_procctl(void *cpu_env, int idtype, abi_ulong arg2, | |
258 | abi_ulong arg3, abi_ulong arg4, abi_ulong arg5, abi_ulong arg6); | |
259 | ||
da07e694 | 260 | /* os-sys.c */ |
7adda6de KE |
261 | abi_long do_freebsd_sysctl(CPUArchState *env, abi_ulong namep, int32_t namelen, |
262 | abi_ulong oldp, abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen); | |
6da777e2 KE |
263 | abi_long do_freebsd_sysctlbyname(CPUArchState *env, abi_ulong namep, |
264 | int32_t namelen, abi_ulong oldp, abi_ulong oldlenp, abi_ulong newp, | |
265 | abi_ulong newlen); | |
da07e694 WL |
266 | abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2); |
267 | ||
84778508 BS |
268 | /* user access */ |
269 | ||
1720751f RH |
270 | #define VERIFY_READ PAGE_READ |
271 | #define VERIFY_WRITE (PAGE_READ | PAGE_WRITE) | |
84778508 | 272 | |
1720751f | 273 | static inline bool access_ok(int type, abi_ulong addr, abi_ulong size) |
84778508 | 274 | { |
bef6f008 | 275 | return page_check_range((target_ulong)addr, size, type); |
84778508 BS |
276 | } |
277 | ||
c2bdd9a1 WL |
278 | /* |
279 | * NOTE __get_user and __put_user use host pointers and don't check access. | |
280 | * | |
281 | * These are usually used to access struct data members once the struct has been | |
282 | * locked - usually with lock_user_struct(). | |
84778508 | 283 | */ |
8a45962b WL |
284 | |
285 | /* | |
286 | * Tricky points: | |
287 | * - Use __builtin_choose_expr to avoid type promotion from ?:, | |
288 | * - Invalid sizes result in a compile time error stemming from | |
289 | * the fact that abort has no parameters. | |
290 | * - It's easier to use the endian-specific unaligned load/store | |
291 | * functions than host-endian unaligned load/store plus tswapN. | |
292 | * - The pragmas are necessary only to silence a clang false-positive | |
293 | * warning: see https://bugs.llvm.org/show_bug.cgi?id=39113 . | |
294 | * - gcc has bugs in its _Pragma() support in some versions, eg | |
295 | * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83256 -- so we only | |
296 | * include the warning-suppression pragmas for clang | |
297 | */ | |
298 | #if defined(__clang__) && __has_warning("-Waddress-of-packed-member") | |
299 | #define PRAGMA_DISABLE_PACKED_WARNING \ | |
300 | _Pragma("GCC diagnostic push"); \ | |
301 | _Pragma("GCC diagnostic ignored \"-Waddress-of-packed-member\"") | |
302 | ||
303 | #define PRAGMA_REENABLE_PACKED_WARNING \ | |
304 | _Pragma("GCC diagnostic pop") | |
305 | ||
306 | #else | |
307 | #define PRAGMA_DISABLE_PACKED_WARNING | |
308 | #define PRAGMA_REENABLE_PACKED_WARNING | |
309 | #endif | |
310 | ||
6538c682 WL |
311 | #define __put_user_e(x, hptr, e) \ |
312 | do { \ | |
313 | PRAGMA_DISABLE_PACKED_WARNING; \ | |
314 | (__builtin_choose_expr(sizeof(*(hptr)) == 1, stb_p, \ | |
315 | __builtin_choose_expr(sizeof(*(hptr)) == 2, stw_##e##_p, \ | |
316 | __builtin_choose_expr(sizeof(*(hptr)) == 4, stl_##e##_p, \ | |
317 | __builtin_choose_expr(sizeof(*(hptr)) == 8, stq_##e##_p, abort)))) \ | |
318 | ((hptr), (x)), (void)0); \ | |
319 | PRAGMA_REENABLE_PACKED_WARNING; \ | |
320 | } while (0) | |
321 | ||
322 | #define __get_user_e(x, hptr, e) \ | |
323 | do { \ | |
324 | PRAGMA_DISABLE_PACKED_WARNING; \ | |
325 | ((x) = (typeof(*hptr))( \ | |
326 | __builtin_choose_expr(sizeof(*(hptr)) == 1, ldub_p, \ | |
327 | __builtin_choose_expr(sizeof(*(hptr)) == 2, lduw_##e##_p, \ | |
328 | __builtin_choose_expr(sizeof(*(hptr)) == 4, ldl_##e##_p, \ | |
329 | __builtin_choose_expr(sizeof(*(hptr)) == 8, ldq_##e##_p, abort)))) \ | |
330 | (hptr)), (void)0); \ | |
331 | PRAGMA_REENABLE_PACKED_WARNING; \ | |
332 | } while (0) | |
333 | ||
334 | ||
335 | #if TARGET_BIG_ENDIAN | |
336 | # define __put_user(x, hptr) __put_user_e(x, hptr, be) | |
337 | # define __get_user(x, hptr) __get_user_e(x, hptr, be) | |
338 | #else | |
339 | # define __put_user(x, hptr) __put_user_e(x, hptr, le) | |
340 | # define __get_user(x, hptr) __get_user_e(x, hptr, le) | |
341 | #endif | |
84778508 | 342 | |
c2bdd9a1 WL |
343 | /* |
344 | * put_user()/get_user() take a guest address and check access | |
345 | * | |
346 | * These are usually used to access an atomic data type, such as an int, that | |
347 | * has been passed by address. These internally perform locking and unlocking | |
348 | * on the data type. | |
84778508 BS |
349 | */ |
350 | #define put_user(x, gaddr, target_type) \ | |
351 | ({ \ | |
352 | abi_ulong __gaddr = (gaddr); \ | |
353 | target_type *__hptr; \ | |
6538c682 | 354 | abi_long __ret = 0; \ |
33066934 WL |
355 | __hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0); \ |
356 | if (__hptr) { \ | |
6538c682 | 357 | __put_user((x), __hptr); \ |
84778508 BS |
358 | unlock_user(__hptr, __gaddr, sizeof(target_type)); \ |
359 | } else \ | |
360 | __ret = -TARGET_EFAULT; \ | |
361 | __ret; \ | |
362 | }) | |
363 | ||
364 | #define get_user(x, gaddr, target_type) \ | |
365 | ({ \ | |
366 | abi_ulong __gaddr = (gaddr); \ | |
367 | target_type *__hptr; \ | |
6538c682 | 368 | abi_long __ret = 0; \ |
33066934 WL |
369 | __hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1); \ |
370 | if (__hptr) { \ | |
6538c682 | 371 | __get_user((x), __hptr); \ |
84778508 BS |
372 | unlock_user(__hptr, __gaddr, 0); \ |
373 | } else { \ | |
84778508 BS |
374 | (x) = 0; \ |
375 | __ret = -TARGET_EFAULT; \ | |
376 | } \ | |
377 | __ret; \ | |
378 | }) | |
379 | ||
380 | #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) | |
381 | #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) | |
382 | #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) | |
383 | #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) | |
384 | #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) | |
385 | #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) | |
386 | #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) | |
387 | #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) | |
388 | #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) | |
389 | #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) | |
390 | ||
391 | #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) | |
392 | #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) | |
393 | #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) | |
394 | #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) | |
395 | #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) | |
396 | #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) | |
397 | #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) | |
398 | #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) | |
399 | #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) | |
400 | #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) | |
401 | ||
c2bdd9a1 WL |
402 | /* |
403 | * copy_from_user() and copy_to_user() are usually used to copy data | |
84778508 BS |
404 | * buffers between the target and host. These internally perform |
405 | * locking/unlocking of the memory. | |
406 | */ | |
407 | abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); | |
408 | abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); | |
409 | ||
c2bdd9a1 WL |
410 | /* |
411 | * Functions for accessing guest memory. The tget and tput functions | |
412 | * read/write single values, byteswapping as necessary. The lock_user function | |
413 | * gets a pointer to a contiguous area of guest memory, but does not perform | |
414 | * any byteswapping. lock_user may return either a pointer to the guest | |
415 | * memory, or a temporary buffer. | |
416 | */ | |
84778508 | 417 | |
c2bdd9a1 WL |
418 | /* |
419 | * Lock an area of guest memory into the host. If copy is true then the | |
420 | * host area will have the same contents as the guest. | |
421 | */ | |
422 | static inline void *lock_user(int type, abi_ulong guest_addr, long len, | |
423 | int copy) | |
84778508 | 424 | { |
cb0ea019 | 425 | if (!access_ok(type, guest_addr, len)) { |
84778508 | 426 | return NULL; |
cb0ea019 | 427 | } |
84778508 BS |
428 | #ifdef DEBUG_REMAP |
429 | { | |
430 | void *addr; | |
fd9a3048 | 431 | addr = g_malloc(len); |
cb0ea019 | 432 | if (copy) { |
3e8f1628 | 433 | memcpy(addr, g2h_untagged(guest_addr), len); |
cb0ea019 | 434 | } else { |
84778508 | 435 | memset(addr, 0, len); |
cb0ea019 | 436 | } |
84778508 BS |
437 | return addr; |
438 | } | |
439 | #else | |
3e8f1628 | 440 | return g2h_untagged(guest_addr); |
84778508 BS |
441 | #endif |
442 | } | |
443 | ||
c2bdd9a1 WL |
444 | /* |
445 | * Unlock an area of guest memory. The first LEN bytes must be flushed back to | |
446 | * guest memory. host_ptr = NULL is explicitly allowed and does nothing. | |
447 | */ | |
84778508 BS |
448 | static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, |
449 | long len) | |
450 | { | |
451 | ||
452 | #ifdef DEBUG_REMAP | |
cb0ea019 | 453 | if (!host_ptr) { |
84778508 | 454 | return; |
cb0ea019 WL |
455 | } |
456 | if (host_ptr == g2h_untagged(guest_addr)) { | |
84778508 | 457 | return; |
cb0ea019 WL |
458 | } |
459 | if (len > 0) { | |
3e8f1628 | 460 | memcpy(g2h_untagged(guest_addr), host_ptr, len); |
cb0ea019 | 461 | } |
fd9a3048 | 462 | g_free(host_ptr); |
84778508 BS |
463 | #endif |
464 | } | |
465 | ||
c2bdd9a1 WL |
466 | /* |
467 | * Return the length of a string in target memory or -TARGET_EFAULT if access | |
468 | * error. | |
469 | */ | |
84778508 BS |
470 | abi_long target_strlen(abi_ulong gaddr); |
471 | ||
472 | /* Like lock_user but for null terminated strings. */ | |
473 | static inline void *lock_user_string(abi_ulong guest_addr) | |
474 | { | |
475 | abi_long len; | |
476 | len = target_strlen(guest_addr); | |
cb0ea019 | 477 | if (len < 0) { |
84778508 | 478 | return NULL; |
cb0ea019 | 479 | } |
84778508 BS |
480 | return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); |
481 | } | |
482 | ||
41d1af4d | 483 | /* Helper macros for locking/unlocking a target struct. */ |
84778508 BS |
484 | #define lock_user_struct(type, host_ptr, guest_addr, copy) \ |
485 | (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) | |
486 | #define unlock_user_struct(host_ptr, guest_addr, copy) \ | |
487 | unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) | |
488 | ||
0ff05082 WL |
489 | static inline uint64_t target_arg64(uint32_t word0, uint32_t word1) |
490 | { | |
491 | #if TARGET_ABI_BITS == 32 | |
ee3eb3a7 | 492 | #if TARGET_BIG_ENDIAN |
0ff05082 WL |
493 | return ((uint64_t)word0 << 32) | word1; |
494 | #else | |
495 | return ((uint64_t)word1 << 32) | word0; | |
496 | #endif | |
497 | #else /* TARGET_ABI_BITS != 32 */ | |
498 | return word0; | |
499 | #endif /* TARGET_ABI_BITS != 32 */ | |
500 | } | |
501 | ||
84778508 | 502 | #include <pthread.h> |
84778508 | 503 | |
aae57ac3 WL |
504 | #include "user/safe-syscall.h" |
505 | ||
84778508 | 506 | #endif /* QEMU_H */ |