2 * System call tracing and debugging
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.
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.
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/>.
19 #include "qemu/osdep.h"
20 #include <sys/select.h>
21 #include <sys/syscall.h>
22 #include <sys/ioccom.h>
26 #include "os-strace.h" /* OS dependent strace print functions */
36 return (last) ? "" : ",";
40 * Prints out raw parameter using given format. Caller needs
41 * to do byte swapping if needed.
44 print_raw_param(const char *fmt, abi_long param, int last)
48 (void)snprintf(format, sizeof(format), "%s%s", fmt, get_comma(last));
49 gemu_log(format, param);
52 static void print_sysctl(const struct syscallname *name, abi_long arg1,
53 abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
59 gemu_log("%s({ ", name->name);
60 namep = lock_user(VERIFY_READ, arg1, sizeof(int32_t) * arg2, 1);
64 for (i = 0; i < (uint32_t)arg2; i++) {
65 gemu_log("%d ", tswap32(*p++));
67 unlock_user(namep, arg1, 0);
69 gemu_log("}, %u, 0x" TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ", 0x"
70 TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ")",
71 (uint32_t)arg2, arg3, arg4, arg5, arg6);
74 static void print_execve(const struct syscallname *name, abi_long arg1,
75 abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
78 abi_ulong arg_ptr_addr;
81 s = lock_user_string(arg1);
85 gemu_log("%s(\"%s\",{", name->name, s);
86 unlock_user(s, arg1, 0);
88 for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) {
89 abi_ulong *arg_ptr, arg_addr;
91 arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1);
95 arg_addr = tswapl(*arg_ptr);
96 unlock_user(arg_ptr, arg_ptr_addr, 0);
100 if ((s = lock_user_string(arg_addr))) {
101 gemu_log("\"%s\",", s);
102 unlock_user(s, arg_addr, 0);
108 static void print_ioctl(const struct syscallname *name,
109 abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4,
110 abi_long arg5, abi_long arg6)
112 /* Decode the ioctl request */
113 gemu_log("%s(%d, 0x%0lx { IO%s%s GRP:0x%x('%c') CMD:%d LEN:%d }, 0x"
114 TARGET_ABI_FMT_lx ", ...)",
118 arg2 & IOC_OUT ? "R" : "",
119 arg2 & IOC_IN ? "W" : "",
120 (unsigned)IOCGROUP(arg2),
121 isprint(IOCGROUP(arg2)) ? (char)IOCGROUP(arg2) : '?',
123 (int)IOCPARM_LEN(arg2),
127 static void print_sysarch(const struct syscallname *name, abi_long arg1,
128 abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
131 /* This is os dependent. */
132 do_os_print_sysarch(name, arg1, arg2, arg3, arg4, arg5, arg6);
136 * Variants for the return value output function
139 static void print_syscall_ret_addr(const struct syscallname *name, abi_long ret)
142 gemu_log(" = -1 errno=%d (%s)\n", errno, strerror(errno));
144 gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
149 * An array of all of the syscalls we know about
152 static const struct syscallname freebsd_scnames[] = {
153 #include "freebsd/strace.list"
155 static const struct syscallname netbsd_scnames[] = {
156 #include "netbsd/strace.list"
158 static const struct syscallname openbsd_scnames[] = {
159 #include "openbsd/strace.list"
162 static void print_syscall(int num, const struct syscallname *scnames,
163 unsigned int nscnames, abi_long arg1, abi_long arg2, abi_long arg3,
164 abi_long arg4, abi_long arg5, abi_long arg6)
167 const char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ","
168 TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ","
169 TARGET_ABI_FMT_ld ")";
171 gemu_log("%d ", getpid() );
173 for (i = 0; i < nscnames; i++) {
174 if (scnames[i].nr == num) {
175 if (scnames[i].call != NULL) {
176 scnames[i].call(&scnames[i], arg1, arg2, arg3, arg4, arg5,
179 /* XXX: this format system is broken because it uses
180 host types and host pointers for strings */
181 if (scnames[i].format != NULL) {
182 format = scnames[i].format;
184 gemu_log(format, scnames[i].name, arg1, arg2, arg3, arg4, arg5,
190 gemu_log("Unknown syscall %d\n", num);
193 static void print_syscall_ret(int num, abi_long ret,
194 const struct syscallname *scnames, unsigned int nscnames)
198 for (i = 0; i < nscnames; i++) {
199 if (scnames[i].nr == num) {
200 if (scnames[i].result != NULL) {
201 scnames[i].result(&scnames[i], ret);
204 gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret,
207 gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret);
216 * The public interface to this module.
218 void print_freebsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3,
219 abi_long arg4, abi_long arg5, abi_long arg6)
222 print_syscall(num, freebsd_scnames, ARRAY_SIZE(freebsd_scnames), arg1, arg2,
223 arg3, arg4, arg5, arg6);
226 void print_freebsd_syscall_ret(int num, abi_long ret)
229 print_syscall_ret(num, ret, freebsd_scnames, ARRAY_SIZE(freebsd_scnames));
232 void print_netbsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3,
233 abi_long arg4, abi_long arg5, abi_long arg6)
236 print_syscall(num, netbsd_scnames, ARRAY_SIZE(netbsd_scnames),
237 arg1, arg2, arg3, arg4, arg5, arg6);
240 void print_netbsd_syscall_ret(int num, abi_long ret)
243 print_syscall_ret(num, ret, netbsd_scnames, ARRAY_SIZE(netbsd_scnames));
246 void print_openbsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3,
247 abi_long arg4, abi_long arg5, abi_long arg6)
250 print_syscall(num, openbsd_scnames, ARRAY_SIZE(openbsd_scnames), arg1, arg2,
251 arg3, arg4, arg5, arg6);
254 void print_openbsd_syscall_ret(int num, abi_long ret)
257 print_syscall_ret(num, ret, openbsd_scnames, ARRAY_SIZE(openbsd_scnames));
261 print_signal(abi_ulong arg, int last)
263 const char *signal_name = NULL;
266 signal_name = "SIGHUP";
269 signal_name = "SIGINT";
272 signal_name = "SIGQUIT";
275 signal_name = "SIGILL";
278 signal_name = "SIGABRT";
281 signal_name = "SIGFPE";
284 signal_name = "SIGKILL";
287 signal_name = "SIGSEGV";
290 signal_name = "SIGPIPE";
293 signal_name = "SIGALRM";
296 signal_name = "SIGTERM";
299 signal_name = "SIGUSR1";
302 signal_name = "SIGUSR2";
305 signal_name = "SIGCHLD";
308 signal_name = "SIGCONT";
311 signal_name = "SIGSTOP";
314 signal_name = "SIGTTIN";
317 signal_name = "SIGTTOU";
320 if (signal_name == NULL) {
321 print_raw_param("%ld", arg, last);
324 gemu_log("%s%s", signal_name, get_comma(last));
327 void print_taken_signal(int target_signum, const target_siginfo_t *tinfo)
330 * Print the strace output for a signal being taken:
331 * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} ---
333 gemu_log("%d ", getpid());
335 print_signal(target_signum, 1);