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36999e6a KT |
1 | /* |
2 | * process related system call shims and definitions | |
3 | * | |
4 | * Copyright (c) 2013-14 Stacey D. Son | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifndef BSD_USER_FREEBSD_OS_PROC_H | |
21 | #define BSD_USER_FREEBSD_OS_PROC_H | |
22 | ||
23 | #include <sys/param.h> | |
24 | #include <sys/procctl.h> | |
25 | #include <sys/signal.h> | |
26 | #include <sys/types.h> | |
27 | #include <sys/procdesc.h> | |
28 | #include <sys/wait.h> | |
29 | #include <unistd.h> | |
30 | ||
31 | #include "target_arch_cpu.h" | |
32 | ||
ae502887 SS |
33 | pid_t safe_wait4(pid_t wpid, int *status, int options, struct rusage *rusage); |
34 | pid_t safe_wait6(idtype_t idtype, id_t id, int *status, int options, | |
35 | struct __wrusage *wrusage, siginfo_t *infop); | |
36 | ||
0571e3f5 SS |
37 | extern int __setugid(int flag); |
38 | ||
36999e6a KT |
39 | /* execve(2) */ |
40 | static inline abi_long do_freebsd_execve(abi_ulong path_or_fd, abi_ulong argp, | |
41 | abi_ulong envp) | |
42 | { | |
43 | ||
44 | return freebsd_exec_common(path_or_fd, argp, envp, 0); | |
45 | } | |
46 | ||
47 | /* fexecve(2) */ | |
48 | static inline abi_long do_freebsd_fexecve(abi_ulong path_or_fd, abi_ulong argp, | |
49 | abi_ulong envp) | |
50 | { | |
51 | ||
52 | return freebsd_exec_common(path_or_fd, argp, envp, 1); | |
53 | } | |
54 | ||
ae502887 SS |
55 | /* wait4(2) */ |
56 | static inline abi_long do_freebsd_wait4(abi_long arg1, abi_ulong target_status, | |
57 | abi_long arg3, abi_ulong target_rusage) | |
58 | { | |
59 | abi_long ret; | |
60 | int status; | |
61 | struct rusage rusage, *rusage_ptr = NULL; | |
62 | ||
63 | if (target_rusage) { | |
64 | rusage_ptr = &rusage; | |
65 | } | |
66 | ret = get_errno(safe_wait4(arg1, &status, arg3, rusage_ptr)); | |
67 | ||
68 | if (ret < 0) { | |
69 | return ret; | |
70 | } | |
71 | if (target_status != 0) { | |
72 | status = host_to_target_waitstatus(status); | |
73 | if (put_user_s32(status, target_status) != 0) { | |
74 | return -TARGET_EFAULT; | |
75 | } | |
76 | } | |
77 | if (target_rusage != 0) { | |
78 | host_to_target_rusage(target_rusage, &rusage); | |
79 | } | |
80 | return ret; | |
81 | } | |
82 | ||
83 | /* wait6(2) */ | |
84 | static inline abi_long do_freebsd_wait6(void *cpu_env, abi_long idtype, | |
85 | abi_long id1, abi_long id2, | |
86 | abi_ulong target_status, abi_long options, abi_ulong target_wrusage, | |
87 | abi_ulong target_infop, abi_ulong pad1) | |
88 | { | |
89 | abi_long ret; | |
90 | int status; | |
91 | struct __wrusage wrusage, *wrusage_ptr = NULL; | |
92 | siginfo_t info; | |
93 | void *p; | |
94 | ||
95 | if (regpairs_aligned(cpu_env) != 0) { | |
96 | /* printf("shifting args\n"); */ | |
97 | /* 64-bit id is aligned, so shift all the arguments over by one */ | |
98 | id1 = id2; | |
99 | id2 = target_status; | |
100 | target_status = options; | |
101 | options = target_wrusage; | |
102 | target_wrusage = target_infop; | |
103 | target_infop = pad1; | |
104 | } | |
105 | ||
106 | if (target_wrusage) { | |
107 | wrusage_ptr = &wrusage; | |
108 | } | |
109 | ret = get_errno(safe_wait6(idtype, target_arg64(id1, id2), | |
110 | &status, options, wrusage_ptr, &info)); | |
111 | ||
112 | if (ret < 0) { | |
113 | return ret; | |
114 | } | |
115 | if (target_status != 0) { | |
116 | status = host_to_target_waitstatus(status); | |
117 | if (put_user_s32(status, target_status) != 0) { | |
118 | return -TARGET_EFAULT; | |
119 | } | |
120 | } | |
121 | if (target_wrusage != 0) { | |
122 | host_to_target_wrusage(target_wrusage, &wrusage); | |
123 | } | |
124 | if (target_infop != 0) { | |
125 | p = lock_user(VERIFY_WRITE, target_infop, sizeof(target_siginfo_t), 0); | |
126 | if (p == NULL) { | |
127 | return -TARGET_EFAULT; | |
128 | } | |
129 | host_to_target_siginfo(p, &info); | |
130 | unlock_user(p, target_infop, sizeof(target_siginfo_t)); | |
131 | } | |
132 | return ret; | |
133 | } | |
134 | ||
159e5b0c SS |
135 | /* setloginclass(2) */ |
136 | static inline abi_long do_freebsd_setloginclass(abi_ulong arg1) | |
137 | { | |
138 | abi_long ret; | |
139 | void *p; | |
140 | ||
141 | p = lock_user_string(arg1); | |
142 | if (p == NULL) { | |
143 | return -TARGET_EFAULT; | |
144 | } | |
145 | ret = get_errno(setloginclass(p)); | |
146 | unlock_user(p, arg1, 0); | |
147 | ||
148 | return ret; | |
149 | } | |
150 | ||
151 | /* getloginclass(2) */ | |
152 | static inline abi_long do_freebsd_getloginclass(abi_ulong arg1, abi_ulong arg2) | |
153 | { | |
154 | abi_long ret; | |
155 | void *p; | |
156 | ||
157 | p = lock_user(VERIFY_WRITE, arg1, arg2, 0); | |
158 | if (p == NULL) { | |
159 | return -TARGET_EFAULT; | |
160 | } | |
161 | ret = get_errno(getloginclass(p, arg2)); | |
162 | unlock_user(p, arg1, arg2); | |
163 | ||
164 | return ret; | |
165 | } | |
166 | ||
0571e3f5 SS |
167 | /* pdgetpid(2) */ |
168 | static inline abi_long do_freebsd_pdgetpid(abi_long fd, abi_ulong target_pidp) | |
169 | { | |
170 | abi_long ret; | |
171 | pid_t pid; | |
172 | ||
173 | ret = get_errno(pdgetpid(fd, &pid)); | |
174 | if (!is_error(ret)) { | |
175 | if (put_user_u32(pid, target_pidp)) { | |
176 | return -TARGET_EFAULT; | |
177 | } | |
178 | } | |
179 | return ret; | |
180 | } | |
181 | ||
182 | /* undocumented __setugid */ | |
183 | static inline abi_long do_freebsd___setugid(abi_long arg1) | |
184 | { | |
185 | return -TARGET_ENOSYS; | |
186 | } | |
187 | ||
831a5a7f SS |
188 | /* fork(2) */ |
189 | static inline abi_long do_freebsd_fork(void *cpu_env) | |
190 | { | |
191 | abi_long ret; | |
192 | abi_ulong child_flag; | |
193 | ||
194 | fork_start(); | |
195 | ret = fork(); | |
196 | if (ret == 0) { | |
197 | /* child */ | |
198 | child_flag = 1; | |
199 | target_cpu_clone_regs(cpu_env, 0); | |
200 | } else { | |
201 | /* parent */ | |
202 | child_flag = 0; | |
203 | } | |
204 | ||
205 | /* | |
206 | * The fork system call sets a child flag in the second return | |
207 | * value: 0 for parent process, 1 for child process. | |
208 | */ | |
209 | set_second_rval(cpu_env, child_flag); | |
210 | ||
211 | fork_end(child_flag); | |
212 | ||
213 | return ret; | |
214 | } | |
215 | ||
216 | /* vfork(2) */ | |
217 | static inline abi_long do_freebsd_vfork(void *cpu_env) | |
218 | { | |
219 | return do_freebsd_fork(cpu_env); | |
220 | } | |
221 | ||
510eecbc SS |
222 | /* rfork(2) */ |
223 | static inline abi_long do_freebsd_rfork(void *cpu_env, abi_long flags) | |
224 | { | |
225 | abi_long ret; | |
226 | abi_ulong child_flag; | |
227 | ||
228 | /* | |
229 | * XXX We need to handle RFMEM here, as well. Neither are safe to execute | |
230 | * as-is on x86 hosts because they'll split memory but not the stack, | |
231 | * wreaking havoc on host architectures that use the stack to store the | |
232 | * return address as both threads try to pop it off. Rejecting RFSPAWN | |
233 | * entirely for now is ok, the only consumer at the moment is posix_spawn | |
234 | * and it will fall back to classic vfork(2) if we return EINVAL. | |
235 | */ | |
236 | if ((flags & TARGET_RFSPAWN) != 0) { | |
237 | return -TARGET_EINVAL; | |
238 | } | |
239 | fork_start(); | |
240 | ret = rfork(flags); | |
241 | if (ret == 0) { | |
242 | /* child */ | |
243 | child_flag = 1; | |
244 | target_cpu_clone_regs(cpu_env, 0); | |
245 | } else { | |
246 | /* parent */ | |
247 | child_flag = 0; | |
248 | } | |
249 | ||
250 | /* | |
251 | * The fork system call sets a child flag in the second return | |
252 | * value: 0 for parent process, 1 for child process. | |
253 | */ | |
254 | set_second_rval(cpu_env, child_flag); | |
255 | fork_end(child_flag); | |
256 | ||
257 | return ret; | |
258 | ||
259 | } | |
260 | ||
6756ae28 SS |
261 | /* pdfork(2) */ |
262 | static inline abi_long do_freebsd_pdfork(void *cpu_env, abi_ulong target_fdp, | |
263 | abi_long flags) | |
264 | { | |
265 | abi_long ret; | |
266 | abi_ulong child_flag; | |
267 | int fd; | |
268 | ||
269 | fork_start(); | |
270 | ret = pdfork(&fd, flags); | |
271 | if (ret == 0) { | |
272 | /* child */ | |
273 | child_flag = 1; | |
274 | target_cpu_clone_regs(cpu_env, 0); | |
275 | } else { | |
276 | /* parent */ | |
277 | child_flag = 0; | |
278 | if (put_user_s32(fd, target_fdp)) { | |
279 | return -TARGET_EFAULT; | |
280 | } | |
281 | } | |
282 | ||
283 | /* | |
284 | * The fork system call sets a child flag in the second return | |
285 | * value: 0 for parent process, 1 for child process. | |
286 | */ | |
287 | set_second_rval(cpu_env, child_flag); | |
288 | fork_end(child_flag); | |
289 | ||
290 | return ret; | |
291 | } | |
292 | ||
36999e6a | 293 | #endif /* BSD_USER_FREEBSD_OS_PROC_H */ |