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Commit | Line | Data |
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88dae46d SB |
1 | /* |
2 | * System call tracing and debugging | |
3 | * | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
2231197c | 19 | #include "qemu/osdep.h" |
84778508 | 20 | #include <sys/select.h> |
84778508 | 21 | #include <sys/syscall.h> |
88dae46d | 22 | #include <sys/ioccom.h> |
84778508 | 23 | |
88dae46d | 24 | #include "qemu.h" |
82723866 | 25 | #include "user/tswap-target.h" |
84778508 | 26 | |
ea1ab4cf SS |
27 | #include "os-strace.h" /* OS dependent strace print functions */ |
28 | ||
88dae46d | 29 | int do_strace; |
84778508 BS |
30 | |
31 | /* | |
32 | * Utility functions | |
33 | */ | |
fd5bec9a WL |
34 | static const char * |
35 | get_comma(int last) | |
36 | { | |
37 | return (last) ? "" : ","; | |
38 | } | |
39 | ||
40 | /* | |
41 | * Prints out raw parameter using given format. Caller needs | |
42 | * to do byte swapping if needed. | |
43 | */ | |
44 | static void | |
45 | print_raw_param(const char *fmt, abi_long param, int last) | |
46 | { | |
47 | char format[64]; | |
48 | ||
49 | (void)snprintf(format, sizeof(format), "%s%s", fmt, get_comma(last)); | |
50 | gemu_log(format, param); | |
51 | } | |
84778508 | 52 | |
80b34604 SB |
53 | static void print_sysctl(const struct syscallname *name, abi_long arg1, |
54 | abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, | |
55 | abi_long arg6) | |
56 | { | |
57 | uint32_t i; | |
58 | int32_t *namep; | |
59 | ||
60 | gemu_log("%s({ ", name->name); | |
61 | namep = lock_user(VERIFY_READ, arg1, sizeof(int32_t) * arg2, 1); | |
62 | if (namep) { | |
63 | int32_t *p = namep; | |
64 | ||
65 | for (i = 0; i < (uint32_t)arg2; i++) { | |
66 | gemu_log("%d ", tswap32(*p++)); | |
67 | } | |
68 | unlock_user(namep, arg1, 0); | |
69 | } | |
70 | gemu_log("}, %u, 0x" TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ", 0x" | |
71 | TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ")", | |
72 | (uint32_t)arg2, arg3, arg4, arg5, arg6); | |
73 | } | |
74 | ||
88dae46d SB |
75 | static void print_execve(const struct syscallname *name, abi_long arg1, |
76 | abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, | |
77 | abi_long arg6) | |
84778508 BS |
78 | { |
79 | abi_ulong arg_ptr_addr; | |
80 | char *s; | |
81 | ||
88dae46d SB |
82 | s = lock_user_string(arg1); |
83 | if (s == NULL) { | |
84778508 | 84 | return; |
88dae46d | 85 | } |
84778508 BS |
86 | gemu_log("%s(\"%s\",{", name->name, s); |
87 | unlock_user(s, arg1, 0); | |
88 | ||
89 | for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) { | |
18c9a9c3 | 90 | abi_ulong *arg_ptr, arg_addr; |
84778508 BS |
91 | |
92 | arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1); | |
88dae46d | 93 | if (!arg_ptr) { |
84778508 | 94 | return; |
88dae46d | 95 | } |
84778508 BS |
96 | arg_addr = tswapl(*arg_ptr); |
97 | unlock_user(arg_ptr, arg_ptr_addr, 0); | |
88dae46d | 98 | if (!arg_addr) { |
84778508 | 99 | break; |
88dae46d | 100 | } |
84778508 BS |
101 | if ((s = lock_user_string(arg_addr))) { |
102 | gemu_log("\"%s\",", s); | |
18c9a9c3 | 103 | unlock_user(s, arg_addr, 0); |
84778508 BS |
104 | } |
105 | } | |
84778508 BS |
106 | gemu_log("NULL})"); |
107 | } | |
108 | ||
b85159a3 SB |
109 | static void print_ioctl(const struct syscallname *name, |
110 | abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, | |
111 | abi_long arg5, abi_long arg6) | |
112 | { | |
113 | /* Decode the ioctl request */ | |
114 | gemu_log("%s(%d, 0x%0lx { IO%s%s GRP:0x%x('%c') CMD:%d LEN:%d }, 0x" | |
115 | TARGET_ABI_FMT_lx ", ...)", | |
116 | name->name, | |
117 | (int)arg1, | |
118 | (unsigned long)arg2, | |
119 | arg2 & IOC_OUT ? "R" : "", | |
120 | arg2 & IOC_IN ? "W" : "", | |
121 | (unsigned)IOCGROUP(arg2), | |
122 | isprint(IOCGROUP(arg2)) ? (char)IOCGROUP(arg2) : '?', | |
123 | (int)arg2 & 0xFF, | |
124 | (int)IOCPARM_LEN(arg2), | |
125 | arg3); | |
126 | } | |
127 | ||
ea1ab4cf SS |
128 | static void print_sysarch(const struct syscallname *name, abi_long arg1, |
129 | abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, | |
130 | abi_long arg6) | |
131 | { | |
132 | /* This is os dependent. */ | |
133 | do_os_print_sysarch(name, arg1, arg2, arg3, arg4, arg5, arg6); | |
134 | } | |
135 | ||
84778508 BS |
136 | /* |
137 | * Variants for the return value output function | |
138 | */ | |
139 | ||
88dae46d | 140 | static void print_syscall_ret_addr(const struct syscallname *name, abi_long ret) |
84778508 | 141 | { |
88dae46d | 142 | if (ret == -1) { |
84778508 BS |
143 | gemu_log(" = -1 errno=%d (%s)\n", errno, strerror(errno)); |
144 | } else { | |
145 | gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret); | |
146 | } | |
147 | } | |
148 | ||
84778508 BS |
149 | /* |
150 | * An array of all of the syscalls we know about | |
151 | */ | |
152 | ||
153 | static const struct syscallname freebsd_scnames[] = { | |
154 | #include "freebsd/strace.list" | |
155 | }; | |
156 | static const struct syscallname netbsd_scnames[] = { | |
157 | #include "netbsd/strace.list" | |
158 | }; | |
159 | static const struct syscallname openbsd_scnames[] = { | |
160 | #include "openbsd/strace.list" | |
161 | }; | |
162 | ||
88dae46d SB |
163 | static void print_syscall(int num, const struct syscallname *scnames, |
164 | unsigned int nscnames, abi_long arg1, abi_long arg2, abi_long arg3, | |
165 | abi_long arg4, abi_long arg5, abi_long arg6) | |
84778508 BS |
166 | { |
167 | unsigned int i; | |
168 | const char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," | |
169 | TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," | |
170 | TARGET_ABI_FMT_ld ")"; | |
171 | ||
172 | gemu_log("%d ", getpid() ); | |
173 | ||
88dae46d | 174 | for (i = 0; i < nscnames; i++) { |
84778508 BS |
175 | if (scnames[i].nr == num) { |
176 | if (scnames[i].call != NULL) { | |
177 | scnames[i].call(&scnames[i], arg1, arg2, arg3, arg4, arg5, | |
88dae46d | 178 | arg6); |
84778508 BS |
179 | } else { |
180 | /* XXX: this format system is broken because it uses | |
181 | host types and host pointers for strings */ | |
88dae46d | 182 | if (scnames[i].format != NULL) { |
84778508 | 183 | format = scnames[i].format; |
88dae46d SB |
184 | } |
185 | gemu_log(format, scnames[i].name, arg1, arg2, arg3, arg4, arg5, | |
186 | arg6); | |
84778508 BS |
187 | } |
188 | return; | |
189 | } | |
88dae46d | 190 | } |
84778508 BS |
191 | gemu_log("Unknown syscall %d\n", num); |
192 | } | |
193 | ||
88dae46d SB |
194 | static void print_syscall_ret(int num, abi_long ret, |
195 | const struct syscallname *scnames, unsigned int nscnames) | |
84778508 BS |
196 | { |
197 | unsigned int i; | |
198 | ||
88dae46d | 199 | for (i = 0; i < nscnames; i++) { |
84778508 BS |
200 | if (scnames[i].nr == num) { |
201 | if (scnames[i].result != NULL) { | |
202 | scnames[i].result(&scnames[i], ret); | |
203 | } else { | |
88dae46d | 204 | if (ret < 0) { |
84778508 BS |
205 | gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret, |
206 | strerror(-ret)); | |
207 | } else { | |
208 | gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret); | |
209 | } | |
210 | } | |
211 | break; | |
212 | } | |
88dae46d | 213 | } |
84778508 BS |
214 | } |
215 | ||
216 | /* | |
217 | * The public interface to this module. | |
218 | */ | |
88dae46d SB |
219 | void print_freebsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3, |
220 | abi_long arg4, abi_long arg5, abi_long arg6) | |
84778508 | 221 | { |
88dae46d SB |
222 | |
223 | print_syscall(num, freebsd_scnames, ARRAY_SIZE(freebsd_scnames), arg1, arg2, | |
224 | arg3, arg4, arg5, arg6); | |
84778508 BS |
225 | } |
226 | ||
88dae46d | 227 | void print_freebsd_syscall_ret(int num, abi_long ret) |
84778508 | 228 | { |
88dae46d | 229 | |
84778508 BS |
230 | print_syscall_ret(num, ret, freebsd_scnames, ARRAY_SIZE(freebsd_scnames)); |
231 | } | |
232 | ||
88dae46d SB |
233 | void print_netbsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3, |
234 | abi_long arg4, abi_long arg5, abi_long arg6) | |
84778508 | 235 | { |
88dae46d | 236 | |
84778508 BS |
237 | print_syscall(num, netbsd_scnames, ARRAY_SIZE(netbsd_scnames), |
238 | arg1, arg2, arg3, arg4, arg5, arg6); | |
239 | } | |
240 | ||
88dae46d | 241 | void print_netbsd_syscall_ret(int num, abi_long ret) |
84778508 | 242 | { |
88dae46d | 243 | |
84778508 BS |
244 | print_syscall_ret(num, ret, netbsd_scnames, ARRAY_SIZE(netbsd_scnames)); |
245 | } | |
246 | ||
88dae46d SB |
247 | void print_openbsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3, |
248 | abi_long arg4, abi_long arg5, abi_long arg6) | |
84778508 | 249 | { |
88dae46d SB |
250 | |
251 | print_syscall(num, openbsd_scnames, ARRAY_SIZE(openbsd_scnames), arg1, arg2, | |
252 | arg3, arg4, arg5, arg6); | |
84778508 BS |
253 | } |
254 | ||
88dae46d | 255 | void print_openbsd_syscall_ret(int num, abi_long ret) |
84778508 | 256 | { |
88dae46d | 257 | |
84778508 BS |
258 | print_syscall_ret(num, ret, openbsd_scnames, ARRAY_SIZE(openbsd_scnames)); |
259 | } | |
fd5bec9a WL |
260 | |
261 | static void | |
262 | print_signal(abi_ulong arg, int last) | |
263 | { | |
264 | const char *signal_name = NULL; | |
265 | switch (arg) { | |
266 | case TARGET_SIGHUP: | |
267 | signal_name = "SIGHUP"; | |
268 | break; | |
269 | case TARGET_SIGINT: | |
270 | signal_name = "SIGINT"; | |
271 | break; | |
272 | case TARGET_SIGQUIT: | |
273 | signal_name = "SIGQUIT"; | |
274 | break; | |
275 | case TARGET_SIGILL: | |
276 | signal_name = "SIGILL"; | |
277 | break; | |
278 | case TARGET_SIGABRT: | |
279 | signal_name = "SIGABRT"; | |
280 | break; | |
281 | case TARGET_SIGFPE: | |
282 | signal_name = "SIGFPE"; | |
283 | break; | |
284 | case TARGET_SIGKILL: | |
285 | signal_name = "SIGKILL"; | |
286 | break; | |
287 | case TARGET_SIGSEGV: | |
288 | signal_name = "SIGSEGV"; | |
289 | break; | |
290 | case TARGET_SIGPIPE: | |
291 | signal_name = "SIGPIPE"; | |
292 | break; | |
293 | case TARGET_SIGALRM: | |
294 | signal_name = "SIGALRM"; | |
295 | break; | |
296 | case TARGET_SIGTERM: | |
297 | signal_name = "SIGTERM"; | |
298 | break; | |
299 | case TARGET_SIGUSR1: | |
300 | signal_name = "SIGUSR1"; | |
301 | break; | |
302 | case TARGET_SIGUSR2: | |
303 | signal_name = "SIGUSR2"; | |
304 | break; | |
305 | case TARGET_SIGCHLD: | |
306 | signal_name = "SIGCHLD"; | |
307 | break; | |
308 | case TARGET_SIGCONT: | |
309 | signal_name = "SIGCONT"; | |
310 | break; | |
311 | case TARGET_SIGSTOP: | |
312 | signal_name = "SIGSTOP"; | |
313 | break; | |
314 | case TARGET_SIGTTIN: | |
315 | signal_name = "SIGTTIN"; | |
316 | break; | |
317 | case TARGET_SIGTTOU: | |
318 | signal_name = "SIGTTOU"; | |
319 | break; | |
320 | } | |
321 | if (signal_name == NULL) { | |
322 | print_raw_param("%ld", arg, last); | |
323 | return; | |
324 | } | |
325 | gemu_log("%s%s", signal_name, get_comma(last)); | |
326 | } | |
327 | ||
328 | void print_taken_signal(int target_signum, const target_siginfo_t *tinfo) | |
329 | { | |
330 | /* | |
331 | * Print the strace output for a signal being taken: | |
332 | * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} --- | |
333 | */ | |
334 | gemu_log("%d ", getpid()); | |
335 | gemu_log("--- "); | |
336 | print_signal(target_signum, 1); | |
337 | gemu_log(" ---\n"); | |
338 | } |