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19#include "qemu/osdep.h"
20#include "qemu/cutils.h"
21#include "qemu/path.h"
22#include <sys/syscall.h>
23#include <sys/param.h>
24#include <sys/sysctl.h>
25#include <utime.h>
26
27#include "qemu.h"
28#include "qemu-common.h"
29
30
31
32static abi_ulong target_brk;
33static abi_ulong target_original_brk;
34
35static inline abi_long get_errno(abi_long ret)
36{
37 if (ret == -1)
38
39 return -(errno);
40 else
41 return ret;
42}
43
44#define target_to_host_bitmask(x, tbl) (x)
45
46static inline int is_error(abi_long ret)
47{
48 return (abi_ulong)ret >= (abi_ulong)(-4096);
49}
50
51void target_set_brk(abi_ulong new_brk)
52{
53 target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);
54}
55
56
57static abi_long do_obreak(abi_ulong new_brk)
58{
59 abi_ulong brk_page;
60 abi_long mapped_addr;
61 int new_alloc_size;
62
63 if (!new_brk)
64 return 0;
65 if (new_brk < target_original_brk)
66 return -TARGET_EINVAL;
67
68 brk_page = HOST_PAGE_ALIGN(target_brk);
69
70
71 if (new_brk < brk_page) {
72 target_brk = new_brk;
73 return 0;
74 }
75
76
77 new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page + 1);
78 mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,
79 PROT_READ|PROT_WRITE,
80 MAP_ANON|MAP_FIXED|MAP_PRIVATE, -1, 0));
81
82 if (!is_error(mapped_addr))
83 target_brk = new_brk;
84 else
85 return mapped_addr;
86
87 return 0;
88}
89
90#if defined(TARGET_I386)
91static abi_long do_freebsd_sysarch(CPUX86State *env, int op, abi_ulong parms)
92{
93 abi_long ret = 0;
94 abi_ulong val;
95 int idx;
96
97 switch(op) {
98#ifdef TARGET_ABI32
99 case TARGET_FREEBSD_I386_SET_GSBASE:
100 case TARGET_FREEBSD_I386_SET_FSBASE:
101 if (op == TARGET_FREEBSD_I386_SET_GSBASE)
102#else
103 case TARGET_FREEBSD_AMD64_SET_GSBASE:
104 case TARGET_FREEBSD_AMD64_SET_FSBASE:
105 if (op == TARGET_FREEBSD_AMD64_SET_GSBASE)
106#endif
107 idx = R_GS;
108 else
109 idx = R_FS;
110 if (get_user(val, parms, abi_ulong))
111 return -TARGET_EFAULT;
112 cpu_x86_load_seg(env, idx, 0);
113 env->segs[idx].base = val;
114 break;
115#ifdef TARGET_ABI32
116 case TARGET_FREEBSD_I386_GET_GSBASE:
117 case TARGET_FREEBSD_I386_GET_FSBASE:
118 if (op == TARGET_FREEBSD_I386_GET_GSBASE)
119#else
120 case TARGET_FREEBSD_AMD64_GET_GSBASE:
121 case TARGET_FREEBSD_AMD64_GET_FSBASE:
122 if (op == TARGET_FREEBSD_AMD64_GET_GSBASE)
123#endif
124 idx = R_GS;
125 else
126 idx = R_FS;
127 val = env->segs[idx].base;
128 if (put_user(val, parms, abi_ulong))
129 return -TARGET_EFAULT;
130 break;
131
132 default:
133 ret = -TARGET_EINVAL;
134 break;
135 }
136 return ret;
137}
138#endif
139
140#ifdef TARGET_SPARC
141static abi_long do_freebsd_sysarch(void *env, int op, abi_ulong parms)
142{
143
144
145
146
147 return -TARGET_EINVAL;
148}
149#endif
150
151#ifdef __FreeBSD__
152
153
154
155
156
157static int
158oidfmt(int *oid, int len, char *fmt, uint32_t *kind)
159{
160 int qoid[CTL_MAXNAME+2];
161 uint8_t buf[BUFSIZ];
162 int i;
163 size_t j;
164
165 qoid[0] = 0;
166 qoid[1] = 4;
167 memcpy(qoid + 2, oid, len * sizeof(int));
168
169 j = sizeof(buf);
170 i = sysctl(qoid, len + 2, buf, &j, 0, 0);
171 if (i)
172 return i;
173
174 if (kind)
175 *kind = *(uint32_t *)buf;
176
177 if (fmt)
178 strcpy(fmt, (char *)(buf + sizeof(uint32_t)));
179 return (0);
180}
181
182
183
184
185
186static int sysctl_oldcvt(void *holdp, size_t holdlen, uint32_t kind)
187{
188 switch (kind & CTLTYPE) {
189 case CTLTYPE_INT:
190 case CTLTYPE_UINT:
191 *(uint32_t *)holdp = tswap32(*(uint32_t *)holdp);
192 break;
193#ifdef TARGET_ABI32
194 case CTLTYPE_LONG:
195 case CTLTYPE_ULONG:
196 *(uint32_t *)holdp = tswap32(*(long *)holdp);
197 break;
198#else
199 case CTLTYPE_LONG:
200 *(uint64_t *)holdp = tswap64(*(long *)holdp);
201 case CTLTYPE_ULONG:
202 *(uint64_t *)holdp = tswap64(*(unsigned long *)holdp);
203 break;
204#endif
205#ifdef CTLTYPE_U64
206 case CTLTYPE_S64:
207 case CTLTYPE_U64:
208#else
209 case CTLTYPE_QUAD:
210#endif
211 *(uint64_t *)holdp = tswap64(*(uint64_t *)holdp);
212 break;
213 case CTLTYPE_STRING:
214 break;
215 default:
216
217 return -1;
218 }
219 return 0;
220}
221
222
223static abi_long do_freebsd_sysctl(abi_ulong namep, int32_t namelen, abi_ulong oldp,
224 abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen)
225{
226 abi_long ret;
227 void *hnamep, *holdp, *hnewp = NULL;
228 size_t holdlen;
229 abi_ulong oldlen = 0;
230 int32_t *snamep = g_malloc(sizeof(int32_t) * namelen), *p, *q, i;
231 uint32_t kind = 0;
232
233 if (oldlenp)
234 get_user_ual(oldlen, oldlenp);
235 if (!(hnamep = lock_user(VERIFY_READ, namep, namelen, 1)))
236 return -TARGET_EFAULT;
237 if (newp && !(hnewp = lock_user(VERIFY_READ, newp, newlen, 1)))
238 return -TARGET_EFAULT;
239 if (!(holdp = lock_user(VERIFY_WRITE, oldp, oldlen, 0)))
240 return -TARGET_EFAULT;
241 holdlen = oldlen;
242 for (p = hnamep, q = snamep, i = 0; i < namelen; p++, i++)
243 *q++ = tswap32(*p);
244 oidfmt(snamep, namelen, NULL, &kind);
245
246 ret = get_errno(sysctl(snamep, namelen, holdp, &holdlen, hnewp, newlen));
247 if (!ret)
248 sysctl_oldcvt(holdp, holdlen, kind);
249 put_user_ual(holdlen, oldlenp);
250 unlock_user(hnamep, namep, 0);
251 unlock_user(holdp, oldp, holdlen);
252 if (hnewp)
253 unlock_user(hnewp, newp, 0);
254 g_free(snamep);
255 return ret;
256}
257#endif
258
259
260
261
262
263static abi_long lock_iovec(int type, struct iovec *vec, abi_ulong target_addr,
264 int count, int copy)
265{
266 struct target_iovec *target_vec;
267 abi_ulong base;
268 int i;
269
270 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
271 if (!target_vec)
272 return -TARGET_EFAULT;
273 for(i = 0;i < count; i++) {
274 base = tswapl(target_vec[i].iov_base);
275 vec[i].iov_len = tswapl(target_vec[i].iov_len);
276 if (vec[i].iov_len != 0) {
277 vec[i].iov_base = lock_user(type, base, vec[i].iov_len, copy);
278
279
280 } else {
281
282 vec[i].iov_base = NULL;
283 }
284 }
285 unlock_user (target_vec, target_addr, 0);
286 return 0;
287}
288
289static abi_long unlock_iovec(struct iovec *vec, abi_ulong target_addr,
290 int count, int copy)
291{
292 struct target_iovec *target_vec;
293 abi_ulong base;
294 int i;
295
296 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
297 if (!target_vec)
298 return -TARGET_EFAULT;
299 for(i = 0;i < count; i++) {
300 if (target_vec[i].iov_base) {
301 base = tswapl(target_vec[i].iov_base);
302 unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0);
303 }
304 }
305 unlock_user (target_vec, target_addr, 0);
306
307 return 0;
308}
309
310
311
312
313abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
314 abi_long arg2, abi_long arg3, abi_long arg4,
315 abi_long arg5, abi_long arg6, abi_long arg7,
316 abi_long arg8)
317{
318 CPUState *cpu = ENV_GET_CPU(cpu_env);
319 abi_long ret;
320 void *p;
321
322#ifdef DEBUG
323 gemu_log("freebsd syscall %d\n", num);
324#endif
325 trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
326 if(do_strace)
327 print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
328
329 switch(num) {
330 case TARGET_FREEBSD_NR_exit:
331#ifdef TARGET_GPROF
332 _mcleanup();
333#endif
334 gdb_exit(cpu_env, arg1);
335
336 _exit(arg1);
337 ret = 0;
338 break;
339 case TARGET_FREEBSD_NR_read:
340 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
341 goto efault;
342 ret = get_errno(read(arg1, p, arg3));
343 unlock_user(p, arg2, ret);
344 break;
345 case TARGET_FREEBSD_NR_write:
346 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
347 goto efault;
348 ret = get_errno(write(arg1, p, arg3));
349 unlock_user(p, arg2, 0);
350 break;
351 case TARGET_FREEBSD_NR_writev:
352 {
353 int count = arg3;
354 struct iovec *vec;
355
356 vec = alloca(count * sizeof(struct iovec));
357 if (lock_iovec(VERIFY_READ, vec, arg2, count, 1) < 0)
358 goto efault;
359 ret = get_errno(writev(arg1, vec, count));
360 unlock_iovec(vec, arg2, count, 0);
361 }
362 break;
363 case TARGET_FREEBSD_NR_open:
364 if (!(p = lock_user_string(arg1)))
365 goto efault;
366 ret = get_errno(open(path(p),
367 target_to_host_bitmask(arg2, fcntl_flags_tbl),
368 arg3));
369 unlock_user(p, arg1, 0);
370 break;
371 case TARGET_FREEBSD_NR_mmap:
372 ret = get_errno(target_mmap(arg1, arg2, arg3,
373 target_to_host_bitmask(arg4, mmap_flags_tbl),
374 arg5,
375 arg6));
376 break;
377 case TARGET_FREEBSD_NR_mprotect:
378 ret = get_errno(target_mprotect(arg1, arg2, arg3));
379 break;
380 case TARGET_FREEBSD_NR_break:
381 ret = do_obreak(arg1);
382 break;
383#ifdef __FreeBSD__
384 case TARGET_FREEBSD_NR___sysctl:
385 ret = do_freebsd_sysctl(arg1, arg2, arg3, arg4, arg5, arg6);
386 break;
387#endif
388 case TARGET_FREEBSD_NR_sysarch:
389 ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
390 break;
391 case TARGET_FREEBSD_NR_syscall:
392 case TARGET_FREEBSD_NR___syscall:
393 ret = do_freebsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,arg7,arg8,0);
394 break;
395 default:
396 ret = get_errno(syscall(num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8));
397 break;
398 }
399 fail:
400#ifdef DEBUG
401 gemu_log(" = %ld\n", ret);
402#endif
403 if (do_strace)
404 print_freebsd_syscall_ret(num, ret);
405 trace_guest_user_syscall_ret(cpu, num, ret);
406 return ret;
407 efault:
408 ret = -TARGET_EFAULT;
409 goto fail;
410}
411
412abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
413 abi_long arg2, abi_long arg3, abi_long arg4,
414 abi_long arg5, abi_long arg6)
415{
416 CPUState *cpu = ENV_GET_CPU(cpu_env);
417 abi_long ret;
418 void *p;
419
420#ifdef DEBUG
421 gemu_log("netbsd syscall %d\n", num);
422#endif
423 trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0);
424 if(do_strace)
425 print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
426
427 switch(num) {
428 case TARGET_NETBSD_NR_exit:
429#ifdef TARGET_GPROF
430 _mcleanup();
431#endif
432 gdb_exit(cpu_env, arg1);
433
434 _exit(arg1);
435 ret = 0;
436 break;
437 case TARGET_NETBSD_NR_read:
438 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
439 goto efault;
440 ret = get_errno(read(arg1, p, arg3));
441 unlock_user(p, arg2, ret);
442 break;
443 case TARGET_NETBSD_NR_write:
444 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
445 goto efault;
446 ret = get_errno(write(arg1, p, arg3));
447 unlock_user(p, arg2, 0);
448 break;
449 case TARGET_NETBSD_NR_open:
450 if (!(p = lock_user_string(arg1)))
451 goto efault;
452 ret = get_errno(open(path(p),
453 target_to_host_bitmask(arg2, fcntl_flags_tbl),
454 arg3));
455 unlock_user(p, arg1, 0);
456 break;
457 case TARGET_NETBSD_NR_mmap:
458 ret = get_errno(target_mmap(arg1, arg2, arg3,
459 target_to_host_bitmask(arg4, mmap_flags_tbl),
460 arg5,
461 arg6));
462 break;
463 case TARGET_NETBSD_NR_mprotect:
464 ret = get_errno(target_mprotect(arg1, arg2, arg3));
465 break;
466 case TARGET_NETBSD_NR_syscall:
467 case TARGET_NETBSD_NR___syscall:
468 ret = do_netbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
469 break;
470 default:
471 ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
472 break;
473 }
474 fail:
475#ifdef DEBUG
476 gemu_log(" = %ld\n", ret);
477#endif
478 if (do_strace)
479 print_netbsd_syscall_ret(num, ret);
480 trace_guest_user_syscall_ret(cpu, num, ret);
481 return ret;
482 efault:
483 ret = -TARGET_EFAULT;
484 goto fail;
485}
486
487abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
488 abi_long arg2, abi_long arg3, abi_long arg4,
489 abi_long arg5, abi_long arg6)
490{
491 CPUState *cpu = ENV_GET_CPU(cpu_env);
492 abi_long ret;
493 void *p;
494
495#ifdef DEBUG
496 gemu_log("openbsd syscall %d\n", num);
497#endif
498 trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0);
499 if(do_strace)
500 print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
501
502 switch(num) {
503 case TARGET_OPENBSD_NR_exit:
504#ifdef TARGET_GPROF
505 _mcleanup();
506#endif
507 gdb_exit(cpu_env, arg1);
508
509 _exit(arg1);
510 ret = 0;
511 break;
512 case TARGET_OPENBSD_NR_read:
513 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
514 goto efault;
515 ret = get_errno(read(arg1, p, arg3));
516 unlock_user(p, arg2, ret);
517 break;
518 case TARGET_OPENBSD_NR_write:
519 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
520 goto efault;
521 ret = get_errno(write(arg1, p, arg3));
522 unlock_user(p, arg2, 0);
523 break;
524 case TARGET_OPENBSD_NR_open:
525 if (!(p = lock_user_string(arg1)))
526 goto efault;
527 ret = get_errno(open(path(p),
528 target_to_host_bitmask(arg2, fcntl_flags_tbl),
529 arg3));
530 unlock_user(p, arg1, 0);
531 break;
532 case TARGET_OPENBSD_NR_mmap:
533 ret = get_errno(target_mmap(arg1, arg2, arg3,
534 target_to_host_bitmask(arg4, mmap_flags_tbl),
535 arg5,
536 arg6));
537 break;
538 case TARGET_OPENBSD_NR_mprotect:
539 ret = get_errno(target_mprotect(arg1, arg2, arg3));
540 break;
541 case TARGET_OPENBSD_NR_syscall:
542 case TARGET_OPENBSD_NR___syscall:
543 ret = do_openbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
544 break;
545 default:
546 ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
547 break;
548 }
549 fail:
550#ifdef DEBUG
551 gemu_log(" = %ld\n", ret);
552#endif
553 if (do_strace)
554 print_openbsd_syscall_ret(num, ret);
555 trace_guest_user_syscall_ret(cpu, num, ret);
556 return ret;
557 efault:
558 ret = -TARGET_EFAULT;
559 goto fail;
560}
561
562void syscall_init(void)
563{
564}
565
