4 * Copyright (c) 2003 - 2008 Fabrice Bellard
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.
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.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #include "qemu/osdep.h"
20 #include "qemu/cutils.h"
21 #include "qemu/path.h"
23 #include <sys/syscall.h>
24 #include <sys/param.h>
25 #include <sys/sysctl.h>
29 #include "qemu-common.h"
33 static abi_ulong target_brk;
34 static abi_ulong target_original_brk;
36 static inline abi_long get_errno(abi_long ret)
39 /* XXX need to translate host -> target errnos here */
45 #define target_to_host_bitmask(x, tbl) (x)
47 static inline int is_error(abi_long ret)
49 return (abi_ulong)ret >= (abi_ulong)(-4096);
52 void target_set_brk(abi_ulong new_brk)
54 target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);
57 /* do_obreak() must return target errnos. */
58 static abi_long do_obreak(abi_ulong new_brk)
66 if (new_brk < target_original_brk)
67 return -TARGET_EINVAL;
69 brk_page = HOST_PAGE_ALIGN(target_brk);
71 /* If the new brk is less than this, set it and we're done... */
72 if (new_brk < brk_page) {
77 /* We need to allocate more memory after the brk... */
78 new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page + 1);
79 mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,
81 MAP_ANON|MAP_FIXED|MAP_PRIVATE, -1, 0));
83 if (!is_error(mapped_addr))
91 #if defined(TARGET_I386)
92 static abi_long do_freebsd_sysarch(CPUX86State *env, int op, abi_ulong parms)
100 case TARGET_FREEBSD_I386_SET_GSBASE:
101 case TARGET_FREEBSD_I386_SET_FSBASE:
102 if (op == TARGET_FREEBSD_I386_SET_GSBASE)
104 case TARGET_FREEBSD_AMD64_SET_GSBASE:
105 case TARGET_FREEBSD_AMD64_SET_FSBASE:
106 if (op == TARGET_FREEBSD_AMD64_SET_GSBASE)
111 if (get_user(val, parms, abi_ulong))
112 return -TARGET_EFAULT;
113 cpu_x86_load_seg(env, idx, 0);
114 env->segs[idx].base = val;
117 case TARGET_FREEBSD_I386_GET_GSBASE:
118 case TARGET_FREEBSD_I386_GET_FSBASE:
119 if (op == TARGET_FREEBSD_I386_GET_GSBASE)
121 case TARGET_FREEBSD_AMD64_GET_GSBASE:
122 case TARGET_FREEBSD_AMD64_GET_FSBASE:
123 if (op == TARGET_FREEBSD_AMD64_GET_GSBASE)
128 val = env->segs[idx].base;
129 if (put_user(val, parms, abi_ulong))
130 return -TARGET_EFAULT;
132 /* XXX handle the others... */
134 ret = -TARGET_EINVAL;
142 static abi_long do_freebsd_sysarch(void *env, int op, abi_ulong parms)
145 * TARGET_FREEBSD_SPARC_UTRAP_INSTALL,
146 * TARGET_FREEBSD_SPARC_SIGTRAMP_INSTALL
148 return -TARGET_EINVAL;
154 * XXX this uses the undocumented oidfmt interface to find the kind of
155 * a requested sysctl, see /sys/kern/kern_sysctl.c:sysctl_sysctl_oidfmt()
156 * (this is mostly copied from src/sbin/sysctl/sysctl.c)
159 oidfmt(int *oid, int len, char *fmt, uint32_t *kind)
161 int qoid[CTL_MAXNAME+2];
168 memcpy(qoid + 2, oid, len * sizeof(int));
171 i = sysctl(qoid, len + 2, buf, &j, 0, 0);
176 *kind = *(uint32_t *)buf;
179 strcpy(fmt, (char *)(buf + sizeof(uint32_t)));
184 * try and convert sysctl return data for the target.
185 * XXX doesn't handle CTLTYPE_OPAQUE and CTLTYPE_STRUCT.
187 static int sysctl_oldcvt(void *holdp, size_t holdlen, uint32_t kind)
189 switch (kind & CTLTYPE) {
192 *(uint32_t *)holdp = tswap32(*(uint32_t *)holdp);
197 *(uint32_t *)holdp = tswap32(*(long *)holdp);
201 *(uint64_t *)holdp = tswap64(*(long *)holdp);
203 *(uint64_t *)holdp = tswap64(*(unsigned long *)holdp);
212 *(uint64_t *)holdp = tswap64(*(uint64_t *)holdp);
223 /* XXX this needs to be emulated on non-FreeBSD hosts... */
224 static abi_long do_freebsd_sysctl(abi_ulong namep, int32_t namelen, abi_ulong oldp,
225 abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen)
228 void *hnamep, *holdp, *hnewp = NULL;
230 abi_ulong oldlen = 0;
231 int32_t *snamep = g_malloc(sizeof(int32_t) * namelen), *p, *q, i;
235 get_user_ual(oldlen, oldlenp);
236 if (!(hnamep = lock_user(VERIFY_READ, namep, namelen, 1)))
237 return -TARGET_EFAULT;
238 if (newp && !(hnewp = lock_user(VERIFY_READ, newp, newlen, 1)))
239 return -TARGET_EFAULT;
240 if (!(holdp = lock_user(VERIFY_WRITE, oldp, oldlen, 0)))
241 return -TARGET_EFAULT;
243 for (p = hnamep, q = snamep, i = 0; i < namelen; p++, i++)
245 oidfmt(snamep, namelen, NULL, &kind);
247 ret = get_errno(sysctl(snamep, namelen, holdp, &holdlen, hnewp, newlen));
249 sysctl_oldcvt(holdp, holdlen, kind);
250 put_user_ual(holdlen, oldlenp);
251 unlock_user(hnamep, namep, 0);
252 unlock_user(holdp, oldp, holdlen);
254 unlock_user(hnewp, newp, 0);
261 * lock_iovec()/unlock_iovec() have a return code of 0 for success where
262 * other lock functions have a return code of 0 for failure.
264 static abi_long lock_iovec(int type, struct iovec *vec, abi_ulong target_addr,
267 struct target_iovec *target_vec;
271 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
273 return -TARGET_EFAULT;
274 for(i = 0;i < count; i++) {
275 base = tswapl(target_vec[i].iov_base);
276 vec[i].iov_len = tswapl(target_vec[i].iov_len);
277 if (vec[i].iov_len != 0) {
278 vec[i].iov_base = lock_user(type, base, vec[i].iov_len, copy);
279 /* Don't check lock_user return value. We must call writev even
280 if a element has invalid base address. */
282 /* zero length pointer is ignored */
283 vec[i].iov_base = NULL;
286 unlock_user (target_vec, target_addr, 0);
290 static abi_long unlock_iovec(struct iovec *vec, abi_ulong target_addr,
293 struct target_iovec *target_vec;
297 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
299 return -TARGET_EFAULT;
300 for(i = 0;i < count; i++) {
301 if (target_vec[i].iov_base) {
302 base = tswapl(target_vec[i].iov_base);
303 unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0);
306 unlock_user (target_vec, target_addr, 0);
311 /* do_syscall() should always have a single exit point at the end so
312 that actions, such as logging of syscall results, can be performed.
313 All errnos that do_syscall() returns must be -TARGET_<errcode>. */
314 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
315 abi_long arg2, abi_long arg3, abi_long arg4,
316 abi_long arg5, abi_long arg6, abi_long arg7,
323 gemu_log("freebsd syscall %d\n", num);
326 print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
329 case TARGET_FREEBSD_NR_exit:
333 gdb_exit(cpu_env, arg1);
334 /* XXX: should free thread stack and CPU env */
336 ret = 0; /* avoid warning */
338 case TARGET_FREEBSD_NR_read:
339 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
341 ret = get_errno(read(arg1, p, arg3));
342 unlock_user(p, arg2, ret);
344 case TARGET_FREEBSD_NR_write:
345 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
347 ret = get_errno(write(arg1, p, arg3));
348 unlock_user(p, arg2, 0);
350 case TARGET_FREEBSD_NR_writev:
355 vec = alloca(count * sizeof(struct iovec));
356 if (lock_iovec(VERIFY_READ, vec, arg2, count, 1) < 0)
358 ret = get_errno(writev(arg1, vec, count));
359 unlock_iovec(vec, arg2, count, 0);
362 case TARGET_FREEBSD_NR_open:
363 if (!(p = lock_user_string(arg1)))
365 ret = get_errno(open(path(p),
366 target_to_host_bitmask(arg2, fcntl_flags_tbl),
368 unlock_user(p, arg1, 0);
370 case TARGET_FREEBSD_NR_mmap:
371 ret = get_errno(target_mmap(arg1, arg2, arg3,
372 target_to_host_bitmask(arg4, mmap_flags_tbl),
376 case TARGET_FREEBSD_NR_mprotect:
377 ret = get_errno(target_mprotect(arg1, arg2, arg3));
379 case TARGET_FREEBSD_NR_break:
380 ret = do_obreak(arg1);
383 case TARGET_FREEBSD_NR___sysctl:
384 ret = do_freebsd_sysctl(arg1, arg2, arg3, arg4, arg5, arg6);
387 case TARGET_FREEBSD_NR_sysarch:
388 ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
390 case TARGET_FREEBSD_NR_syscall:
391 case TARGET_FREEBSD_NR___syscall:
392 ret = do_freebsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,arg7,arg8,0);
395 ret = get_errno(syscall(num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8));
400 gemu_log(" = %ld\n", ret);
403 print_freebsd_syscall_ret(num, ret);
406 ret = -TARGET_EFAULT;
410 abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
411 abi_long arg2, abi_long arg3, abi_long arg4,
412 abi_long arg5, abi_long arg6)
418 gemu_log("netbsd syscall %d\n", num);
421 print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
424 case TARGET_NETBSD_NR_exit:
428 gdb_exit(cpu_env, arg1);
429 /* XXX: should free thread stack and CPU env */
431 ret = 0; /* avoid warning */
433 case TARGET_NETBSD_NR_read:
434 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
436 ret = get_errno(read(arg1, p, arg3));
437 unlock_user(p, arg2, ret);
439 case TARGET_NETBSD_NR_write:
440 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
442 ret = get_errno(write(arg1, p, arg3));
443 unlock_user(p, arg2, 0);
445 case TARGET_NETBSD_NR_open:
446 if (!(p = lock_user_string(arg1)))
448 ret = get_errno(open(path(p),
449 target_to_host_bitmask(arg2, fcntl_flags_tbl),
451 unlock_user(p, arg1, 0);
453 case TARGET_NETBSD_NR_mmap:
454 ret = get_errno(target_mmap(arg1, arg2, arg3,
455 target_to_host_bitmask(arg4, mmap_flags_tbl),
459 case TARGET_NETBSD_NR_mprotect:
460 ret = get_errno(target_mprotect(arg1, arg2, arg3));
462 case TARGET_NETBSD_NR_syscall:
463 case TARGET_NETBSD_NR___syscall:
464 ret = do_netbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
467 ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
472 gemu_log(" = %ld\n", ret);
475 print_netbsd_syscall_ret(num, ret);
478 ret = -TARGET_EFAULT;
482 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
483 abi_long arg2, abi_long arg3, abi_long arg4,
484 abi_long arg5, abi_long arg6)
490 gemu_log("openbsd syscall %d\n", num);
493 print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
496 case TARGET_OPENBSD_NR_exit:
500 gdb_exit(cpu_env, arg1);
501 /* XXX: should free thread stack and CPU env */
503 ret = 0; /* avoid warning */
505 case TARGET_OPENBSD_NR_read:
506 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
508 ret = get_errno(read(arg1, p, arg3));
509 unlock_user(p, arg2, ret);
511 case TARGET_OPENBSD_NR_write:
512 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
514 ret = get_errno(write(arg1, p, arg3));
515 unlock_user(p, arg2, 0);
517 case TARGET_OPENBSD_NR_open:
518 if (!(p = lock_user_string(arg1)))
520 ret = get_errno(open(path(p),
521 target_to_host_bitmask(arg2, fcntl_flags_tbl),
523 unlock_user(p, arg1, 0);
525 case TARGET_OPENBSD_NR_mmap:
526 ret = get_errno(target_mmap(arg1, arg2, arg3,
527 target_to_host_bitmask(arg4, mmap_flags_tbl),
531 case TARGET_OPENBSD_NR_mprotect:
532 ret = get_errno(target_mprotect(arg1, arg2, arg3));
534 case TARGET_OPENBSD_NR_syscall:
535 case TARGET_OPENBSD_NR___syscall:
536 ret = do_openbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
539 ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
544 gemu_log(" = %ld\n", ret);
547 print_openbsd_syscall_ret(num, ret);
550 ret = -TARGET_EFAULT;
554 void syscall_init(void)