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84778508 BS |
1 | /* |
2 | * BSD syscalls | |
3 | * | |
4 | * Copyright (c) 2003 - 2008 Fabrice Bellard | |
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 | |
8167ee88 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
84778508 BS |
18 | */ |
19 | #include <stdlib.h> | |
20 | #include <stdio.h> | |
21 | #include <stdint.h> | |
22 | #include <stdarg.h> | |
23 | #include <string.h> | |
24 | #include <errno.h> | |
25 | #include <unistd.h> | |
26 | #include <fcntl.h> | |
27 | #include <time.h> | |
28 | #include <limits.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/mman.h> | |
31 | #include <sys/syscall.h> | |
32 | #include <signal.h> | |
33 | #include <utime.h> | |
34 | ||
35 | #include "qemu.h" | |
36 | #include "qemu-common.h" | |
37 | ||
38 | //#define DEBUG | |
39 | ||
40 | static abi_ulong target_brk; | |
41 | static abi_ulong target_original_brk; | |
42 | ||
43 | #define get_errno(x) (x) | |
44 | #define target_to_host_bitmask(x, tbl) (x) | |
45 | ||
46 | void target_set_brk(abi_ulong new_brk) | |
47 | { | |
48 | target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk); | |
49 | } | |
50 | ||
51 | /* do_syscall() should always have a single exit point at the end so | |
52 | that actions, such as logging of syscall results, can be performed. | |
53 | All errnos that do_syscall() returns must be -TARGET_<errcode>. */ | |
54 | abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, | |
55 | abi_long arg2, abi_long arg3, abi_long arg4, | |
56 | abi_long arg5, abi_long arg6) | |
57 | { | |
58 | abi_long ret; | |
59 | void *p; | |
60 | ||
61 | #ifdef DEBUG | |
62 | gemu_log("freebsd syscall %d\n", num); | |
63 | #endif | |
64 | if(do_strace) | |
65 | print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); | |
66 | ||
67 | switch(num) { | |
68 | case TARGET_FREEBSD_NR_exit: | |
69 | #ifdef HAVE_GPROF | |
70 | _mcleanup(); | |
71 | #endif | |
72 | gdb_exit(cpu_env, arg1); | |
73 | /* XXX: should free thread stack and CPU env */ | |
74 | _exit(arg1); | |
75 | ret = 0; /* avoid warning */ | |
76 | break; | |
77 | case TARGET_FREEBSD_NR_read: | |
78 | if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0))) | |
79 | goto efault; | |
80 | ret = get_errno(read(arg1, p, arg3)); | |
81 | unlock_user(p, arg2, ret); | |
82 | break; | |
83 | case TARGET_FREEBSD_NR_write: | |
84 | if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1))) | |
85 | goto efault; | |
86 | ret = get_errno(write(arg1, p, arg3)); | |
87 | unlock_user(p, arg2, 0); | |
88 | break; | |
89 | case TARGET_FREEBSD_NR_open: | |
90 | if (!(p = lock_user_string(arg1))) | |
91 | goto efault; | |
92 | ret = get_errno(open(path(p), | |
93 | target_to_host_bitmask(arg2, fcntl_flags_tbl), | |
94 | arg3)); | |
95 | unlock_user(p, arg1, 0); | |
96 | break; | |
97 | case TARGET_FREEBSD_NR_mmap: | |
98 | ret = get_errno(target_mmap(arg1, arg2, arg3, | |
99 | target_to_host_bitmask(arg4, mmap_flags_tbl), | |
100 | arg5, | |
101 | arg6)); | |
102 | break; | |
103 | case TARGET_FREEBSD_NR_mprotect: | |
104 | ret = get_errno(target_mprotect(arg1, arg2, arg3)); | |
105 | break; | |
106 | case TARGET_FREEBSD_NR_syscall: | |
107 | case TARGET_FREEBSD_NR___syscall: | |
108 | ret = do_freebsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0); | |
109 | break; | |
110 | default: | |
111 | ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); | |
112 | break; | |
113 | } | |
114 | fail: | |
115 | #ifdef DEBUG | |
116 | gemu_log(" = %ld\n", ret); | |
117 | #endif | |
118 | if (do_strace) | |
119 | print_freebsd_syscall_ret(num, ret); | |
120 | return ret; | |
121 | efault: | |
122 | ret = -TARGET_EFAULT; | |
123 | goto fail; | |
124 | } | |
125 | ||
126 | abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, | |
127 | abi_long arg2, abi_long arg3, abi_long arg4, | |
128 | abi_long arg5, abi_long arg6) | |
129 | { | |
130 | abi_long ret; | |
131 | void *p; | |
132 | ||
133 | #ifdef DEBUG | |
134 | gemu_log("netbsd syscall %d\n", num); | |
135 | #endif | |
136 | if(do_strace) | |
137 | print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); | |
138 | ||
139 | switch(num) { | |
140 | case TARGET_NETBSD_NR_exit: | |
141 | #ifdef HAVE_GPROF | |
142 | _mcleanup(); | |
143 | #endif | |
144 | gdb_exit(cpu_env, arg1); | |
145 | /* XXX: should free thread stack and CPU env */ | |
146 | _exit(arg1); | |
147 | ret = 0; /* avoid warning */ | |
148 | break; | |
149 | case TARGET_NETBSD_NR_read: | |
150 | if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0))) | |
151 | goto efault; | |
152 | ret = get_errno(read(arg1, p, arg3)); | |
153 | unlock_user(p, arg2, ret); | |
154 | break; | |
155 | case TARGET_NETBSD_NR_write: | |
156 | if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1))) | |
157 | goto efault; | |
158 | ret = get_errno(write(arg1, p, arg3)); | |
159 | unlock_user(p, arg2, 0); | |
160 | break; | |
161 | case TARGET_NETBSD_NR_open: | |
162 | if (!(p = lock_user_string(arg1))) | |
163 | goto efault; | |
164 | ret = get_errno(open(path(p), | |
165 | target_to_host_bitmask(arg2, fcntl_flags_tbl), | |
166 | arg3)); | |
167 | unlock_user(p, arg1, 0); | |
168 | break; | |
169 | case TARGET_NETBSD_NR_mmap: | |
170 | ret = get_errno(target_mmap(arg1, arg2, arg3, | |
171 | target_to_host_bitmask(arg4, mmap_flags_tbl), | |
172 | arg5, | |
173 | arg6)); | |
174 | break; | |
175 | case TARGET_NETBSD_NR_mprotect: | |
176 | ret = get_errno(target_mprotect(arg1, arg2, arg3)); | |
177 | break; | |
178 | case TARGET_NETBSD_NR_syscall: | |
179 | case TARGET_NETBSD_NR___syscall: | |
180 | ret = do_netbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0); | |
181 | break; | |
182 | default: | |
183 | ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); | |
184 | break; | |
185 | } | |
186 | fail: | |
187 | #ifdef DEBUG | |
188 | gemu_log(" = %ld\n", ret); | |
189 | #endif | |
190 | if (do_strace) | |
191 | print_netbsd_syscall_ret(num, ret); | |
192 | return ret; | |
193 | efault: | |
194 | ret = -TARGET_EFAULT; | |
195 | goto fail; | |
196 | } | |
197 | ||
198 | abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, | |
199 | abi_long arg2, abi_long arg3, abi_long arg4, | |
200 | abi_long arg5, abi_long arg6) | |
201 | { | |
202 | abi_long ret; | |
203 | void *p; | |
204 | ||
205 | #ifdef DEBUG | |
206 | gemu_log("openbsd syscall %d\n", num); | |
207 | #endif | |
208 | if(do_strace) | |
209 | print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); | |
210 | ||
211 | switch(num) { | |
212 | case TARGET_OPENBSD_NR_exit: | |
213 | #ifdef HAVE_GPROF | |
214 | _mcleanup(); | |
215 | #endif | |
216 | gdb_exit(cpu_env, arg1); | |
217 | /* XXX: should free thread stack and CPU env */ | |
218 | _exit(arg1); | |
219 | ret = 0; /* avoid warning */ | |
220 | break; | |
221 | case TARGET_OPENBSD_NR_read: | |
222 | if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0))) | |
223 | goto efault; | |
224 | ret = get_errno(read(arg1, p, arg3)); | |
225 | unlock_user(p, arg2, ret); | |
226 | break; | |
227 | case TARGET_OPENBSD_NR_write: | |
228 | if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1))) | |
229 | goto efault; | |
230 | ret = get_errno(write(arg1, p, arg3)); | |
231 | unlock_user(p, arg2, 0); | |
232 | break; | |
233 | case TARGET_OPENBSD_NR_open: | |
234 | if (!(p = lock_user_string(arg1))) | |
235 | goto efault; | |
236 | ret = get_errno(open(path(p), | |
237 | target_to_host_bitmask(arg2, fcntl_flags_tbl), | |
238 | arg3)); | |
239 | unlock_user(p, arg1, 0); | |
240 | break; | |
241 | case TARGET_OPENBSD_NR_mmap: | |
242 | ret = get_errno(target_mmap(arg1, arg2, arg3, | |
243 | target_to_host_bitmask(arg4, mmap_flags_tbl), | |
244 | arg5, | |
245 | arg6)); | |
246 | break; | |
247 | case TARGET_OPENBSD_NR_mprotect: | |
248 | ret = get_errno(target_mprotect(arg1, arg2, arg3)); | |
249 | break; | |
250 | case TARGET_OPENBSD_NR_syscall: | |
251 | case TARGET_OPENBSD_NR___syscall: | |
252 | ret = do_openbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0); | |
253 | break; | |
254 | default: | |
255 | ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); | |
256 | break; | |
257 | } | |
258 | fail: | |
259 | #ifdef DEBUG | |
260 | gemu_log(" = %ld\n", ret); | |
261 | #endif | |
262 | if (do_strace) | |
263 | print_openbsd_syscall_ret(num, ret); | |
264 | return ret; | |
265 | efault: | |
266 | ret = -TARGET_EFAULT; | |
267 | goto fail; | |
268 | } | |
269 | ||
270 | void syscall_init(void) | |
271 | { | |
272 | } |