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"
22 #include <sys/syscall.h>
23 #include <sys/param.h>
24 #include <sys/sysctl.h>
28 #include "qemu-common.h"
32 static abi_ulong target_brk;
33 static abi_ulong target_original_brk;
35 static inline abi_long get_errno(abi_long ret)
38 /* XXX need to translate host -> target errnos here */
44 #define target_to_host_bitmask(x, tbl) (x)
46 static inline int is_error(abi_long ret)
48 return (abi_ulong)ret >= (abi_ulong)(-4096);
51 void target_set_brk(abi_ulong new_brk)
53 target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);
56 /* do_obreak() must return target errnos. */
57 static abi_long do_obreak(abi_ulong new_brk)
65 if (new_brk < target_original_brk)
66 return -TARGET_EINVAL;
68 brk_page = HOST_PAGE_ALIGN(target_brk);
70 /* If the new brk is less than this, set it and we're done... */
71 if (new_brk < brk_page) {
76 /* We need to allocate more memory after the brk... */
77 new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page + 1);
78 mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,
80 MAP_ANON|MAP_FIXED|MAP_PRIVATE, -1, 0));
82 if (!is_error(mapped_addr))
90 #if defined(TARGET_I386)
91 static abi_long do_freebsd_sysarch(CPUX86State *env, int op, abi_ulong parms)
99 case TARGET_FREEBSD_I386_SET_GSBASE:
100 case TARGET_FREEBSD_I386_SET_FSBASE:
101 if (op == TARGET_FREEBSD_I386_SET_GSBASE)
103 case TARGET_FREEBSD_AMD64_SET_GSBASE:
104 case TARGET_FREEBSD_AMD64_SET_FSBASE:
105 if (op == TARGET_FREEBSD_AMD64_SET_GSBASE)
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;
116 case TARGET_FREEBSD_I386_GET_GSBASE:
117 case TARGET_FREEBSD_I386_GET_FSBASE:
118 if (op == TARGET_FREEBSD_I386_GET_GSBASE)
120 case TARGET_FREEBSD_AMD64_GET_GSBASE:
121 case TARGET_FREEBSD_AMD64_GET_FSBASE:
122 if (op == TARGET_FREEBSD_AMD64_GET_GSBASE)
127 val = env->segs[idx].base;
128 if (put_user(val, parms, abi_ulong))
129 return -TARGET_EFAULT;
131 /* XXX handle the others... */
133 ret = -TARGET_EINVAL;
141 static abi_long do_freebsd_sysarch(void *env, int op, abi_ulong parms)
144 * TARGET_FREEBSD_SPARC_UTRAP_INSTALL,
145 * TARGET_FREEBSD_SPARC_SIGTRAMP_INSTALL
147 return -TARGET_EINVAL;
153 * XXX this uses the undocumented oidfmt interface to find the kind of
154 * a requested sysctl, see /sys/kern/kern_sysctl.c:sysctl_sysctl_oidfmt()
155 * (this is mostly copied from src/sbin/sysctl/sysctl.c)
158 oidfmt(int *oid, int len, char *fmt, uint32_t *kind)
160 int qoid[CTL_MAXNAME+2];
167 memcpy(qoid + 2, oid, len * sizeof(int));
170 i = sysctl(qoid, len + 2, buf, &j, 0, 0);
175 *kind = *(uint32_t *)buf;
178 strcpy(fmt, (char *)(buf + sizeof(uint32_t)));
183 * try and convert sysctl return data for the target.
184 * XXX doesn't handle CTLTYPE_OPAQUE and CTLTYPE_STRUCT.
186 static int sysctl_oldcvt(void *holdp, size_t holdlen, uint32_t kind)
188 switch (kind & CTLTYPE) {
191 *(uint32_t *)holdp = tswap32(*(uint32_t *)holdp);
196 *(uint32_t *)holdp = tswap32(*(long *)holdp);
200 *(uint64_t *)holdp = tswap64(*(long *)holdp);
202 *(uint64_t *)holdp = tswap64(*(unsigned long *)holdp);
211 *(uint64_t *)holdp = tswap64(*(uint64_t *)holdp);
222 /* XXX this needs to be emulated on non-FreeBSD hosts... */
223 static abi_long do_freebsd_sysctl(abi_ulong namep, int32_t namelen, abi_ulong oldp,
224 abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen)
227 void *hnamep, *holdp, *hnewp = NULL;
229 abi_ulong oldlen = 0;
230 int32_t *snamep = g_malloc(sizeof(int32_t) * namelen), *p, *q, i;
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;
242 for (p = hnamep, q = snamep, i = 0; i < namelen; p++, i++)
244 oidfmt(snamep, namelen, NULL, &kind);
246 ret = get_errno(sysctl(snamep, namelen, holdp, &holdlen, hnewp, newlen));
248 sysctl_oldcvt(holdp, holdlen, kind);
249 put_user_ual(holdlen, oldlenp);
250 unlock_user(hnamep, namep, 0);
251 unlock_user(holdp, oldp, holdlen);
253 unlock_user(hnewp, newp, 0);
260 * lock_iovec()/unlock_iovec() have a return code of 0 for success where
261 * other lock functions have a return code of 0 for failure.
263 static abi_long lock_iovec(int type, struct iovec *vec, abi_ulong target_addr,
266 struct target_iovec *target_vec;
270 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
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 /* Don't check lock_user return value. We must call writev even
279 if a element has invalid base address. */
281 /* zero length pointer is ignored */
282 vec[i].iov_base = NULL;
285 unlock_user (target_vec, target_addr, 0);
289 static abi_long unlock_iovec(struct iovec *vec, abi_ulong target_addr,
292 struct target_iovec *target_vec;
296 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
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);
305 unlock_user (target_vec, target_addr, 0);
310 /* do_syscall() should always have a single exit point at the end so
311 that actions, such as logging of syscall results, can be performed.
312 All errnos that do_syscall() returns must be -TARGET_<errcode>. */
313 abi_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,
318 CPUState *cpu = ENV_GET_CPU(cpu_env);
323 gemu_log("freebsd syscall %d\n", num);
325 trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
327 print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
330 case TARGET_FREEBSD_NR_exit:
334 gdb_exit(cpu_env, arg1);
335 /* XXX: should free thread stack and CPU env */
337 ret = 0; /* avoid warning */
339 case TARGET_FREEBSD_NR_read:
340 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
342 ret = get_errno(read(arg1, p, arg3));
343 unlock_user(p, arg2, ret);
345 case TARGET_FREEBSD_NR_write:
346 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
348 ret = get_errno(write(arg1, p, arg3));
349 unlock_user(p, arg2, 0);
351 case TARGET_FREEBSD_NR_writev:
356 vec = alloca(count * sizeof(struct iovec));
357 if (lock_iovec(VERIFY_READ, vec, arg2, count, 1) < 0)
359 ret = get_errno(writev(arg1, vec, count));
360 unlock_iovec(vec, arg2, count, 0);
363 case TARGET_FREEBSD_NR_open:
364 if (!(p = lock_user_string(arg1)))
366 ret = get_errno(open(path(p),
367 target_to_host_bitmask(arg2, fcntl_flags_tbl),
369 unlock_user(p, arg1, 0);
371 case TARGET_FREEBSD_NR_mmap:
372 ret = get_errno(target_mmap(arg1, arg2, arg3,
373 target_to_host_bitmask(arg4, mmap_flags_tbl),
377 case TARGET_FREEBSD_NR_mprotect:
378 ret = get_errno(target_mprotect(arg1, arg2, arg3));
380 case TARGET_FREEBSD_NR_break:
381 ret = do_obreak(arg1);
384 case TARGET_FREEBSD_NR___sysctl:
385 ret = do_freebsd_sysctl(arg1, arg2, arg3, arg4, arg5, arg6);
388 case TARGET_FREEBSD_NR_sysarch:
389 ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
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);
396 ret = get_errno(syscall(num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8));
401 gemu_log(" = %ld\n", ret);
404 print_freebsd_syscall_ret(num, ret);
405 trace_guest_user_syscall_ret(cpu, num, ret);
408 ret = -TARGET_EFAULT;
412 abi_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)
416 CPUState *cpu = ENV_GET_CPU(cpu_env);
421 gemu_log("netbsd syscall %d\n", num);
423 trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0);
425 print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
428 case TARGET_NETBSD_NR_exit:
432 gdb_exit(cpu_env, arg1);
433 /* XXX: should free thread stack and CPU env */
435 ret = 0; /* avoid warning */
437 case TARGET_NETBSD_NR_read:
438 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
440 ret = get_errno(read(arg1, p, arg3));
441 unlock_user(p, arg2, ret);
443 case TARGET_NETBSD_NR_write:
444 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
446 ret = get_errno(write(arg1, p, arg3));
447 unlock_user(p, arg2, 0);
449 case TARGET_NETBSD_NR_open:
450 if (!(p = lock_user_string(arg1)))
452 ret = get_errno(open(path(p),
453 target_to_host_bitmask(arg2, fcntl_flags_tbl),
455 unlock_user(p, arg1, 0);
457 case TARGET_NETBSD_NR_mmap:
458 ret = get_errno(target_mmap(arg1, arg2, arg3,
459 target_to_host_bitmask(arg4, mmap_flags_tbl),
463 case TARGET_NETBSD_NR_mprotect:
464 ret = get_errno(target_mprotect(arg1, arg2, arg3));
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);
471 ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
476 gemu_log(" = %ld\n", ret);
479 print_netbsd_syscall_ret(num, ret);
480 trace_guest_user_syscall_ret(cpu, num, ret);
483 ret = -TARGET_EFAULT;
487 abi_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)
491 CPUState *cpu = ENV_GET_CPU(cpu_env);
496 gemu_log("openbsd syscall %d\n", num);
498 trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0);
500 print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
503 case TARGET_OPENBSD_NR_exit:
507 gdb_exit(cpu_env, arg1);
508 /* XXX: should free thread stack and CPU env */
510 ret = 0; /* avoid warning */
512 case TARGET_OPENBSD_NR_read:
513 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
515 ret = get_errno(read(arg1, p, arg3));
516 unlock_user(p, arg2, ret);
518 case TARGET_OPENBSD_NR_write:
519 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
521 ret = get_errno(write(arg1, p, arg3));
522 unlock_user(p, arg2, 0);
524 case TARGET_OPENBSD_NR_open:
525 if (!(p = lock_user_string(arg1)))
527 ret = get_errno(open(path(p),
528 target_to_host_bitmask(arg2, fcntl_flags_tbl),
530 unlock_user(p, arg1, 0);
532 case TARGET_OPENBSD_NR_mmap:
533 ret = get_errno(target_mmap(arg1, arg2, arg3,
534 target_to_host_bitmask(arg4, mmap_flags_tbl),
538 case TARGET_OPENBSD_NR_mprotect:
539 ret = get_errno(target_mprotect(arg1, arg2, arg3));
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);
546 ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
551 gemu_log(" = %ld\n", ret);
554 print_openbsd_syscall_ret(num, ret);
555 trace_guest_user_syscall_ret(cpu, num, ret);
558 ret = -TARGET_EFAULT;
562 void syscall_init(void)