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1.1 root 1: #include <stdio.h>
2: #include <errno.h>
3: #include <sys/ipc.h>
4: #include <sys/msg.h>
5: #include <sys/sem.h>
6: #include <sys/shm.h>
7: #include <sys/select.h>
8: #include <sys/types.h>
9: #include <unistd.h>
10: #include "qemu.h"
11:
12: int do_strace=0;
13:
14: struct syscallname {
15: int nr;
16: char *name;
17: char *format;
18: void (*call)(struct syscallname *,
19: abi_long, abi_long, abi_long,
20: abi_long, abi_long, abi_long);
21: void (*result)(struct syscallname *, abi_long);
22: };
23:
24: /*
25: * Utility functions
26: */
27: static void
28: print_ipc_cmd(int cmd)
29: {
30: #define output_cmd(val) \
31: if( cmd == val ) { \
32: gemu_log(#val); \
33: return; \
34: }
35:
36: cmd &= 0xff;
37:
38: /* General IPC commands */
39: output_cmd( IPC_RMID );
40: output_cmd( IPC_SET );
41: output_cmd( IPC_STAT );
42: output_cmd( IPC_INFO );
43: /* msgctl() commands */
44: #ifdef __USER_MISC
45: output_cmd( MSG_STAT );
46: output_cmd( MSG_INFO );
47: #endif
48: /* shmctl() commands */
49: output_cmd( SHM_LOCK );
50: output_cmd( SHM_UNLOCK );
51: output_cmd( SHM_STAT );
52: output_cmd( SHM_INFO );
53: /* semctl() commands */
54: output_cmd( GETPID );
55: output_cmd( GETVAL );
56: output_cmd( GETALL );
57: output_cmd( GETNCNT );
58: output_cmd( GETZCNT );
59: output_cmd( SETVAL );
60: output_cmd( SETALL );
61: output_cmd( SEM_STAT );
62: output_cmd( SEM_INFO );
63: output_cmd( IPC_RMID );
64: output_cmd( IPC_RMID );
65: output_cmd( IPC_RMID );
66: output_cmd( IPC_RMID );
67: output_cmd( IPC_RMID );
68: output_cmd( IPC_RMID );
69: output_cmd( IPC_RMID );
70: output_cmd( IPC_RMID );
71: output_cmd( IPC_RMID );
72:
73: /* Some value we don't recognize */
74: gemu_log("%d",cmd);
75: }
76:
77: #ifdef TARGET_NR__newselect
78: static void
79: print_fdset(int n, abi_ulong target_fds_addr)
80: {
81: int i;
82:
83: gemu_log("[");
84: if( target_fds_addr ) {
85: abi_long *target_fds;
86:
87: target_fds = lock_user(VERIFY_READ,
88: target_fds_addr,
89: sizeof(*target_fds)*(n / TARGET_ABI_BITS + 1),
90: 1);
91:
92: if (!target_fds)
93: return;
94:
95: for (i=n; i>=0; i--) {
96: if ((tswapl(target_fds[i / TARGET_ABI_BITS]) >> (i & (TARGET_ABI_BITS - 1))) & 1)
97: gemu_log("%d,", i );
98: }
99: unlock_user(target_fds, target_fds_addr, 0);
100: }
101: gemu_log("]");
102: }
103:
104: static void
105: print_timeval(abi_ulong tv_addr)
106: {
107: if( tv_addr ) {
108: struct target_timeval *tv;
109:
110: tv = lock_user(VERIFY_READ, tv_addr, sizeof(*tv), 1);
111: if (!tv)
112: return;
113: gemu_log("{" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "}",
114: tv->tv_sec, tv->tv_usec);
115: unlock_user(tv, tv_addr, 0);
116: } else
117: gemu_log("NULL");
118: }
119: #endif
120:
121: /*
122: * Sysycall specific output functions
123: */
124:
125: /* select */
126: #ifdef TARGET_NR__newselect
127: static long newselect_arg1 = 0;
128: static long newselect_arg2 = 0;
129: static long newselect_arg3 = 0;
130: static long newselect_arg4 = 0;
131: static long newselect_arg5 = 0;
132:
133: static void
134: print_newselect(struct syscallname *name,
135: abi_long arg1, abi_long arg2, abi_long arg3,
136: abi_long arg4, abi_long arg5, abi_long arg6)
137: {
138: gemu_log("%s(" TARGET_ABI_FMT_ld ",", name->name, arg1);
139: print_fdset(arg1, arg2);
140: gemu_log(",");
141: print_fdset(arg1, arg3);
142: gemu_log(",");
143: print_fdset(arg1, arg4);
144: gemu_log(",");
145: print_timeval(arg5);
146: gemu_log(")");
147:
148: /* save for use in the return output function below */
149: newselect_arg1=arg1;
150: newselect_arg2=arg2;
151: newselect_arg3=arg3;
152: newselect_arg4=arg4;
153: newselect_arg5=arg5;
154: }
155: #endif
156:
157: static void
158: print_semctl(struct syscallname *name,
159: abi_long arg1, abi_long arg2, abi_long arg3,
160: abi_long arg4, abi_long arg5, abi_long arg6)
161: {
162: gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ",", name->name, arg1, arg2);
163: print_ipc_cmd(arg3);
164: gemu_log(",0x" TARGET_ABI_FMT_lx ")", arg4);
165: }
166:
167: static void
168: print_execve(struct syscallname *name,
169: abi_long arg1, abi_long arg2, abi_long arg3,
170: abi_long arg4, abi_long arg5, abi_long arg6)
171: {
172: abi_ulong arg_ptr_addr;
173: char *s;
174:
175: if (!(s = lock_user_string(arg1)))
176: return;
177: gemu_log("%s(\"%s\",{", name->name, s);
178: unlock_user(s, arg1, 0);
179:
180: for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) {
181: abi_ulong *arg_ptr, arg_addr, s_addr;
182:
183: arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1);
184: if (!arg_ptr)
185: return;
186: arg_addr = tswapl(*arg_ptr);
187: unlock_user(arg_ptr, arg_ptr_addr, 0);
188: if (!arg_addr)
189: break;
190: if ((s = lock_user_string(arg_addr))) {
191: gemu_log("\"%s\",", s);
192: unlock_user(s, s_addr, 0);
193: }
194: }
195:
196: gemu_log("NULL})");
197: }
198:
199: #ifdef TARGET_NR_ipc
200: static void
201: print_ipc(struct syscallname *name,
202: abi_long arg1, abi_long arg2, abi_long arg3,
203: abi_long arg4, abi_long arg5, abi_long arg6)
204: {
205: switch(arg1) {
206: case IPCOP_semctl:
207: name->name = "semctl";
208: print_semctl(name,arg2,arg3,arg4,arg5,arg6,0);
209: break;
210: default:
211: gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")",
212: name->name, arg1, arg2, arg3, arg4);
213: }
214: }
215: #endif
216:
217: /*
218: * Variants for the return value output function
219: */
220:
221: static void
222: print_syscall_ret_addr(struct syscallname *name, abi_long ret)
223: {
224: if( ret == -1 ) {
225: gemu_log(" = -1 errno=%d (%s)\n", errno, target_strerror(errno));
226: } else {
227: gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
228: }
229: }
230:
231: #if 0 /* currently unused */
232: static void
233: print_syscall_ret_raw(struct syscallname *name, abi_long ret)
234: {
235: gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
236: }
237: #endif
238:
239: #ifdef TARGET_NR__newselect
240: static void
241: print_syscall_ret_newselect(struct syscallname *name, abi_long ret)
242: {
243: gemu_log(" = 0x" TARGET_ABI_FMT_lx " (", ret);
244: print_fdset(newselect_arg1,newselect_arg2);
245: gemu_log(",");
246: print_fdset(newselect_arg1,newselect_arg3);
247: gemu_log(",");
248: print_fdset(newselect_arg1,newselect_arg4);
249: gemu_log(",");
250: print_timeval(newselect_arg5);
251: gemu_log(")\n");
252: }
253: #endif
254:
255: /*
256: * An array of all of the syscalls we know about
257: */
258:
259: static struct syscallname scnames[] = {
260: #include "strace.list"
261: };
262:
263: static int nsyscalls = sizeof(scnames)/sizeof(struct syscallname);
264:
265: /*
266: * The public interface to this module.
267: */
268: void
269: print_syscall(int num,
270: abi_long arg1, abi_long arg2, abi_long arg3,
271: abi_long arg4, abi_long arg5, abi_long arg6)
272: {
273: int i;
274: char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")";
275:
276: gemu_log("%d ", getpid() );
277:
278: for(i=0;i<nsyscalls;i++)
279: if( scnames[i].nr == num ) {
280: if( scnames[i].call != NULL ) {
281: scnames[i].call(&scnames[i],arg1,arg2,arg3,arg4,arg5,arg6);
282: } else {
283: /* XXX: this format system is broken because it uses
284: host types and host pointers for strings */
285: if( scnames[i].format != NULL )
286: format = scnames[i].format;
287: gemu_log(format,scnames[i].name, arg1,arg2,arg3,arg4,arg5,arg6);
288: }
289: break;
290: }
291: }
292:
293:
294: void
295: print_syscall_ret(int num, abi_long ret)
296: {
297: int i;
298:
299: for(i=0;i<nsyscalls;i++)
300: if( scnames[i].nr == num ) {
301: if( scnames[i].result != NULL ) {
302: scnames[i].result(&scnames[i],ret);
303: } else {
304: if( ret < 0 ) {
305: gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret, target_strerror(-ret));
306: } else {
307: gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret);
308: }
309: }
310: break;
311: }
312: }
313:
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