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/>.
29 #include <sys/types.h>
31 #include <sys/syscall.h>
32 #include <sys/param.h>
33 #include <sys/sysctl.h>
38 #include "qemu-common.h"
42 static abi_ulong target_brk;
43 static abi_ulong target_original_brk;
45 static inline abi_long get_errno(abi_long ret)
48 /* XXX need to translate host -> target errnos here */
54 #define target_to_host_bitmask(x, tbl) (x)
56 static inline int is_error(abi_long ret)
58 return (abi_ulong)ret >= (abi_ulong)(-4096);
61 void target_set_brk(abi_ulong new_brk)
63 target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);
66 /* do_obreak() must return target errnos. */
67 static abi_long do_obreak(abi_ulong new_brk)
75 if (new_brk < target_original_brk)
76 return -TARGET_EINVAL;
78 brk_page = HOST_PAGE_ALIGN(target_brk);
80 /* If the new brk is less than this, set it and we're done... */
81 if (new_brk < brk_page) {
86 /* We need to allocate more memory after the brk... */
87 new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page + 1);
88 mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,
90 MAP_ANON|MAP_FIXED|MAP_PRIVATE, -1, 0));
92 if (!is_error(mapped_addr))
100 #if defined(TARGET_I386)
101 static abi_long do_freebsd_sysarch(CPUX86State *env, int op, abi_ulong parms)
109 case TARGET_FREEBSD_I386_SET_GSBASE:
110 case TARGET_FREEBSD_I386_SET_FSBASE:
111 if (op == TARGET_FREEBSD_I386_SET_GSBASE)
113 case TARGET_FREEBSD_AMD64_SET_GSBASE:
114 case TARGET_FREEBSD_AMD64_SET_FSBASE:
115 if (op == TARGET_FREEBSD_AMD64_SET_GSBASE)
120 if (get_user(val, parms, abi_ulong))
121 return -TARGET_EFAULT;
122 cpu_x86_load_seg(env, idx, 0);
123 env->segs[idx].base = val;
126 case TARGET_FREEBSD_I386_GET_GSBASE:
127 case TARGET_FREEBSD_I386_GET_FSBASE:
128 if (op == TARGET_FREEBSD_I386_GET_GSBASE)
130 case TARGET_FREEBSD_AMD64_GET_GSBASE:
131 case TARGET_FREEBSD_AMD64_GET_FSBASE:
132 if (op == TARGET_FREEBSD_AMD64_GET_GSBASE)
137 val = env->segs[idx].base;
138 if (put_user(val, parms, abi_ulong))
139 return -TARGET_EFAULT;
141 /* XXX handle the others... */
143 ret = -TARGET_EINVAL;
151 static abi_long do_freebsd_sysarch(void *env, int op, abi_ulong parms)
154 * TARGET_FREEBSD_SPARC_UTRAP_INSTALL,
155 * TARGET_FREEBSD_SPARC_SIGTRAMP_INSTALL
157 return -TARGET_EINVAL;
163 * XXX this uses the undocumented oidfmt interface to find the kind of
164 * a requested sysctl, see /sys/kern/kern_sysctl.c:sysctl_sysctl_oidfmt()
165 * (this is mostly copied from src/sbin/sysctl/sysctl.c)
168 oidfmt(int *oid, int len, char *fmt, uint32_t *kind)
170 int qoid[CTL_MAXNAME+2];
177 memcpy(qoid + 2, oid, len * sizeof(int));
180 i = sysctl(qoid, len + 2, buf, &j, 0, 0);
185 *kind = *(uint32_t *)buf;
188 strcpy(fmt, (char *)(buf + sizeof(uint32_t)));
193 * try and convert sysctl return data for the target.
194 * XXX doesn't handle CTLTYPE_OPAQUE and CTLTYPE_STRUCT.
196 static int sysctl_oldcvt(void *holdp, size_t holdlen, uint32_t kind)
198 switch (kind & CTLTYPE) {
201 *(uint32_t *)holdp = tswap32(*(uint32_t *)holdp);
206 *(uint32_t *)holdp = tswap32(*(long *)holdp);
210 *(uint64_t *)holdp = tswap64(*(long *)holdp);
212 *(uint64_t *)holdp = tswap64(*(unsigned long *)holdp);
216 *(uint64_t *)holdp = tswap64(*(uint64_t *)holdp);
227 /* XXX this needs to be emulated on non-FreeBSD hosts... */
228 static abi_long do_freebsd_sysctl(abi_ulong namep, int32_t namelen, abi_ulong oldp,
229 abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen)
232 void *hnamep, *holdp, *hnewp = NULL;
234 abi_ulong oldlen = 0;
235 int32_t *snamep = qemu_malloc(sizeof(int32_t) * namelen), *p, *q, i;
239 get_user_ual(oldlen, oldlenp);
240 if (!(hnamep = lock_user(VERIFY_READ, namep, namelen, 1)))
241 return -TARGET_EFAULT;
242 if (newp && !(hnewp = lock_user(VERIFY_READ, newp, newlen, 1)))
243 return -TARGET_EFAULT;
244 if (!(holdp = lock_user(VERIFY_WRITE, oldp, oldlen, 0)))
245 return -TARGET_EFAULT;
247 for (p = hnamep, q = snamep, i = 0; i < namelen; p++, i++)
249 oidfmt(snamep, namelen, NULL, &kind);
251 ret = get_errno(sysctl(snamep, namelen, holdp, &holdlen, hnewp, newlen));
253 sysctl_oldcvt(holdp, holdlen, kind);
254 put_user_ual(holdlen, oldlenp);
255 unlock_user(hnamep, namep, 0);
256 unlock_user(holdp, oldp, holdlen);
258 unlock_user(hnewp, newp, 0);
265 * lock_iovec()/unlock_iovec() have a return code of 0 for success where
266 * other lock functions have a return code of 0 for failure.
268 static abi_long lock_iovec(int type, struct iovec *vec, abi_ulong target_addr,
271 struct target_iovec *target_vec;
275 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
277 return -TARGET_EFAULT;
278 for(i = 0;i < count; i++) {
279 base = tswapl(target_vec[i].iov_base);
280 vec[i].iov_len = tswapl(target_vec[i].iov_len);
281 if (vec[i].iov_len != 0) {
282 vec[i].iov_base = lock_user(type, base, vec[i].iov_len, copy);
283 /* Don't check lock_user return value. We must call writev even
284 if a element has invalid base address. */
286 /* zero length pointer is ignored */
287 vec[i].iov_base = NULL;
290 unlock_user (target_vec, target_addr, 0);
294 static abi_long unlock_iovec(struct iovec *vec, abi_ulong target_addr,
297 struct target_iovec *target_vec;
301 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
303 return -TARGET_EFAULT;
304 for(i = 0;i < count; i++) {
305 if (target_vec[i].iov_base) {
306 base = tswapl(target_vec[i].iov_base);
307 unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0);
310 unlock_user (target_vec, target_addr, 0);
315 /* do_syscall() should always have a single exit point at the end so
316 that actions, such as logging of syscall results, can be performed.
317 All errnos that do_syscall() returns must be -TARGET_<errcode>. */
318 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
319 abi_long arg2, abi_long arg3, abi_long arg4,
320 abi_long arg5, abi_long arg6, abi_long arg7,
327 gemu_log("freebsd syscall %d\n", num);
330 print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
333 case TARGET_FREEBSD_NR_exit:
337 gdb_exit(cpu_env, arg1);
338 /* XXX: should free thread stack and CPU env */
340 ret = 0; /* avoid warning */
342 case TARGET_FREEBSD_NR_read:
343 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
345 ret = get_errno(read(arg1, p, arg3));
346 unlock_user(p, arg2, ret);
348 case TARGET_FREEBSD_NR_write:
349 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
351 ret = get_errno(write(arg1, p, arg3));
352 unlock_user(p, arg2, 0);
354 case TARGET_FREEBSD_NR_writev:
359 vec = alloca(count * sizeof(struct iovec));
360 if (lock_iovec(VERIFY_READ, vec, arg2, count, 1) < 0)
362 ret = get_errno(writev(arg1, vec, count));
363 unlock_iovec(vec, arg2, count, 0);
366 case TARGET_FREEBSD_NR_open:
367 if (!(p = lock_user_string(arg1)))
369 ret = get_errno(open(path(p),
370 target_to_host_bitmask(arg2, fcntl_flags_tbl),
372 unlock_user(p, arg1, 0);
374 case TARGET_FREEBSD_NR_mmap:
375 ret = get_errno(target_mmap(arg1, arg2, arg3,
376 target_to_host_bitmask(arg4, mmap_flags_tbl),
380 case TARGET_FREEBSD_NR_mprotect:
381 ret = get_errno(target_mprotect(arg1, arg2, arg3));
383 case TARGET_FREEBSD_NR_break:
384 ret = do_obreak(arg1);
387 case TARGET_FREEBSD_NR___sysctl:
388 ret = do_freebsd_sysctl(arg1, arg2, arg3, arg4, arg5, arg6);
391 case TARGET_FREEBSD_NR_sysarch:
392 ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
394 case TARGET_FREEBSD_NR_syscall:
395 case TARGET_FREEBSD_NR___syscall:
396 ret = do_freebsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,arg7,arg8,0);
399 ret = get_errno(syscall(num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8));
404 gemu_log(" = %ld\n", ret);
407 print_freebsd_syscall_ret(num, ret);
410 ret = -TARGET_EFAULT;
414 abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
415 abi_long arg2, abi_long arg3, abi_long arg4,
416 abi_long arg5, abi_long arg6)
422 gemu_log("netbsd syscall %d\n", num);
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);
482 ret = -TARGET_EFAULT;
486 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
487 abi_long arg2, abi_long arg3, abi_long arg4,
488 abi_long arg5, abi_long arg6)
494 gemu_log("openbsd syscall %d\n", num);
497 print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
500 case TARGET_OPENBSD_NR_exit:
504 gdb_exit(cpu_env, arg1);
505 /* XXX: should free thread stack and CPU env */
507 ret = 0; /* avoid warning */
509 case TARGET_OPENBSD_NR_read:
510 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
512 ret = get_errno(read(arg1, p, arg3));
513 unlock_user(p, arg2, ret);
515 case TARGET_OPENBSD_NR_write:
516 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
518 ret = get_errno(write(arg1, p, arg3));
519 unlock_user(p, arg2, 0);
521 case TARGET_OPENBSD_NR_open:
522 if (!(p = lock_user_string(arg1)))
524 ret = get_errno(open(path(p),
525 target_to_host_bitmask(arg2, fcntl_flags_tbl),
527 unlock_user(p, arg1, 0);
529 case TARGET_OPENBSD_NR_mmap:
530 ret = get_errno(target_mmap(arg1, arg2, arg3,
531 target_to_host_bitmask(arg4, mmap_flags_tbl),
535 case TARGET_OPENBSD_NR_mprotect:
536 ret = get_errno(target_mprotect(arg1, arg2, arg3));
538 case TARGET_OPENBSD_NR_syscall:
539 case TARGET_OPENBSD_NR___syscall:
540 ret = do_openbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
543 ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
548 gemu_log(" = %ld\n", ret);
551 print_openbsd_syscall_ret(num, ret);
554 ret = -TARGET_EFAULT;
558 void syscall_init(void)