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>
37 #include "qemu-common.h"
41 static abi_ulong target_brk;
42 static abi_ulong target_original_brk;
44 static inline abi_long get_errno(abi_long ret)
47 /* XXX need to translate host -> target errnos here */
53 #define target_to_host_bitmask(x, tbl) (x)
55 static inline int is_error(abi_long ret)
57 return (abi_ulong)ret >= (abi_ulong)(-4096);
60 void target_set_brk(abi_ulong new_brk)
62 target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);
65 /* do_obreak() must return target errnos. */
66 static abi_long do_obreak(abi_ulong new_brk)
74 if (new_brk < target_original_brk)
75 return -TARGET_EINVAL;
77 brk_page = HOST_PAGE_ALIGN(target_brk);
79 /* If the new brk is less than this, set it and we're done... */
80 if (new_brk < brk_page) {
85 /* We need to allocate more memory after the brk... */
86 new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page + 1);
87 mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,
89 MAP_ANON|MAP_FIXED|MAP_PRIVATE, -1, 0));
91 if (!is_error(mapped_addr))
99 #if defined(TARGET_I386)
100 static abi_long do_freebsd_sysarch(CPUX86State *env, int op, abi_ulong parms)
108 case TARGET_FREEBSD_I386_SET_GSBASE:
109 case TARGET_FREEBSD_I386_SET_FSBASE:
110 if (op == TARGET_FREEBSD_I386_SET_GSBASE)
112 case TARGET_FREEBSD_AMD64_SET_GSBASE:
113 case TARGET_FREEBSD_AMD64_SET_FSBASE:
114 if (op == TARGET_FREEBSD_AMD64_SET_GSBASE)
119 if (get_user(val, parms, abi_ulong))
120 return -TARGET_EFAULT;
121 cpu_x86_load_seg(env, idx, 0);
122 env->segs[idx].base = val;
125 case TARGET_FREEBSD_I386_GET_GSBASE:
126 case TARGET_FREEBSD_I386_GET_FSBASE:
127 if (op == TARGET_FREEBSD_I386_GET_GSBASE)
129 case TARGET_FREEBSD_AMD64_GET_GSBASE:
130 case TARGET_FREEBSD_AMD64_GET_FSBASE:
131 if (op == TARGET_FREEBSD_AMD64_GET_GSBASE)
136 val = env->segs[idx].base;
137 if (put_user(val, parms, abi_ulong))
138 return -TARGET_EFAULT;
140 /* XXX handle the others... */
142 ret = -TARGET_EINVAL;
150 static abi_long do_freebsd_sysarch(void *env, int op, abi_ulong parms)
153 * TARGET_FREEBSD_SPARC_UTRAP_INSTALL,
154 * TARGET_FREEBSD_SPARC_SIGTRAMP_INSTALL
156 return -TARGET_EINVAL;
162 * XXX this uses the undocumented oidfmt interface to find the kind of
163 * a requested sysctl, see /sys/kern/kern_sysctl.c:sysctl_sysctl_oidfmt()
164 * (this is mostly copied from src/sbin/sysctl/sysctl.c)
167 oidfmt(int *oid, int len, char *fmt, uint32_t *kind)
169 int qoid[CTL_MAXNAME+2];
176 memcpy(qoid + 2, oid, len * sizeof(int));
179 i = sysctl(qoid, len + 2, buf, &j, 0, 0);
184 *kind = *(uint32_t *)buf;
187 strcpy(fmt, (char *)(buf + sizeof(uint32_t)));
192 * try and convert sysctl return data for the target.
193 * XXX doesn't handle CTLTYPE_OPAQUE and CTLTYPE_STRUCT.
195 static int sysctl_oldcvt(void *holdp, size_t holdlen, uint32_t kind)
197 switch (kind & CTLTYPE) {
200 *(uint32_t *)holdp = tswap32(*(uint32_t *)holdp);
205 *(uint32_t *)holdp = tswap32(*(long *)holdp);
209 *(uint64_t *)holdp = tswap64(*(long *)holdp);
211 *(uint64_t *)holdp = tswap64(*(unsigned long *)holdp);
220 *(uint64_t *)holdp = tswap64(*(uint64_t *)holdp);
231 /* XXX this needs to be emulated on non-FreeBSD hosts... */
232 static abi_long do_freebsd_sysctl(abi_ulong namep, int32_t namelen, abi_ulong oldp,
233 abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen)
236 void *hnamep, *holdp, *hnewp = NULL;
238 abi_ulong oldlen = 0;
239 int32_t *snamep = g_malloc(sizeof(int32_t) * namelen), *p, *q, i;
243 get_user_ual(oldlen, oldlenp);
244 if (!(hnamep = lock_user(VERIFY_READ, namep, namelen, 1)))
245 return -TARGET_EFAULT;
246 if (newp && !(hnewp = lock_user(VERIFY_READ, newp, newlen, 1)))
247 return -TARGET_EFAULT;
248 if (!(holdp = lock_user(VERIFY_WRITE, oldp, oldlen, 0)))
249 return -TARGET_EFAULT;
251 for (p = hnamep, q = snamep, i = 0; i < namelen; p++, i++)
253 oidfmt(snamep, namelen, NULL, &kind);
255 ret = get_errno(sysctl(snamep, namelen, holdp, &holdlen, hnewp, newlen));
257 sysctl_oldcvt(holdp, holdlen, kind);
258 put_user_ual(holdlen, oldlenp);
259 unlock_user(hnamep, namep, 0);
260 unlock_user(holdp, oldp, holdlen);
262 unlock_user(hnewp, newp, 0);
269 * lock_iovec()/unlock_iovec() have a return code of 0 for success where
270 * other lock functions have a return code of 0 for failure.
272 static abi_long lock_iovec(int type, struct iovec *vec, abi_ulong target_addr,
275 struct target_iovec *target_vec;
279 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
281 return -TARGET_EFAULT;
282 for(i = 0;i < count; i++) {
283 base = tswapl(target_vec[i].iov_base);
284 vec[i].iov_len = tswapl(target_vec[i].iov_len);
285 if (vec[i].iov_len != 0) {
286 vec[i].iov_base = lock_user(type, base, vec[i].iov_len, copy);
287 /* Don't check lock_user return value. We must call writev even
288 if a element has invalid base address. */
290 /* zero length pointer is ignored */
291 vec[i].iov_base = NULL;
294 unlock_user (target_vec, target_addr, 0);
298 static abi_long unlock_iovec(struct iovec *vec, abi_ulong target_addr,
301 struct target_iovec *target_vec;
305 target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
307 return -TARGET_EFAULT;
308 for(i = 0;i < count; i++) {
309 if (target_vec[i].iov_base) {
310 base = tswapl(target_vec[i].iov_base);
311 unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0);
314 unlock_user (target_vec, target_addr, 0);
319 /* do_syscall() should always have a single exit point at the end so
320 that actions, such as logging of syscall results, can be performed.
321 All errnos that do_syscall() returns must be -TARGET_<errcode>. */
322 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
323 abi_long arg2, abi_long arg3, abi_long arg4,
324 abi_long arg5, abi_long arg6, abi_long arg7,
331 gemu_log("freebsd syscall %d\n", num);
334 print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
337 case TARGET_FREEBSD_NR_exit:
341 gdb_exit(cpu_env, arg1);
342 /* XXX: should free thread stack and CPU env */
344 ret = 0; /* avoid warning */
346 case TARGET_FREEBSD_NR_read:
347 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
349 ret = get_errno(read(arg1, p, arg3));
350 unlock_user(p, arg2, ret);
352 case TARGET_FREEBSD_NR_write:
353 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
355 ret = get_errno(write(arg1, p, arg3));
356 unlock_user(p, arg2, 0);
358 case TARGET_FREEBSD_NR_writev:
363 vec = alloca(count * sizeof(struct iovec));
364 if (lock_iovec(VERIFY_READ, vec, arg2, count, 1) < 0)
366 ret = get_errno(writev(arg1, vec, count));
367 unlock_iovec(vec, arg2, count, 0);
370 case TARGET_FREEBSD_NR_open:
371 if (!(p = lock_user_string(arg1)))
373 ret = get_errno(open(path(p),
374 target_to_host_bitmask(arg2, fcntl_flags_tbl),
376 unlock_user(p, arg1, 0);
378 case TARGET_FREEBSD_NR_mmap:
379 ret = get_errno(target_mmap(arg1, arg2, arg3,
380 target_to_host_bitmask(arg4, mmap_flags_tbl),
384 case TARGET_FREEBSD_NR_mprotect:
385 ret = get_errno(target_mprotect(arg1, arg2, arg3));
387 case TARGET_FREEBSD_NR_break:
388 ret = do_obreak(arg1);
391 case TARGET_FREEBSD_NR___sysctl:
392 ret = do_freebsd_sysctl(arg1, arg2, arg3, arg4, arg5, arg6);
395 case TARGET_FREEBSD_NR_sysarch:
396 ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
398 case TARGET_FREEBSD_NR_syscall:
399 case TARGET_FREEBSD_NR___syscall:
400 ret = do_freebsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,arg7,arg8,0);
403 ret = get_errno(syscall(num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8));
408 gemu_log(" = %ld\n", ret);
411 print_freebsd_syscall_ret(num, ret);
414 ret = -TARGET_EFAULT;
418 abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
419 abi_long arg2, abi_long arg3, abi_long arg4,
420 abi_long arg5, abi_long arg6)
426 gemu_log("netbsd syscall %d\n", num);
429 print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
432 case TARGET_NETBSD_NR_exit:
436 gdb_exit(cpu_env, arg1);
437 /* XXX: should free thread stack and CPU env */
439 ret = 0; /* avoid warning */
441 case TARGET_NETBSD_NR_read:
442 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
444 ret = get_errno(read(arg1, p, arg3));
445 unlock_user(p, arg2, ret);
447 case TARGET_NETBSD_NR_write:
448 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
450 ret = get_errno(write(arg1, p, arg3));
451 unlock_user(p, arg2, 0);
453 case TARGET_NETBSD_NR_open:
454 if (!(p = lock_user_string(arg1)))
456 ret = get_errno(open(path(p),
457 target_to_host_bitmask(arg2, fcntl_flags_tbl),
459 unlock_user(p, arg1, 0);
461 case TARGET_NETBSD_NR_mmap:
462 ret = get_errno(target_mmap(arg1, arg2, arg3,
463 target_to_host_bitmask(arg4, mmap_flags_tbl),
467 case TARGET_NETBSD_NR_mprotect:
468 ret = get_errno(target_mprotect(arg1, arg2, arg3));
470 case TARGET_NETBSD_NR_syscall:
471 case TARGET_NETBSD_NR___syscall:
472 ret = do_netbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
475 ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
480 gemu_log(" = %ld\n", ret);
483 print_netbsd_syscall_ret(num, ret);
486 ret = -TARGET_EFAULT;
490 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
491 abi_long arg2, abi_long arg3, abi_long arg4,
492 abi_long arg5, abi_long arg6)
498 gemu_log("openbsd syscall %d\n", num);
501 print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
504 case TARGET_OPENBSD_NR_exit:
508 gdb_exit(cpu_env, arg1);
509 /* XXX: should free thread stack and CPU env */
511 ret = 0; /* avoid warning */
513 case TARGET_OPENBSD_NR_read:
514 if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
516 ret = get_errno(read(arg1, p, arg3));
517 unlock_user(p, arg2, ret);
519 case TARGET_OPENBSD_NR_write:
520 if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
522 ret = get_errno(write(arg1, p, arg3));
523 unlock_user(p, arg2, 0);
525 case TARGET_OPENBSD_NR_open:
526 if (!(p = lock_user_string(arg1)))
528 ret = get_errno(open(path(p),
529 target_to_host_bitmask(arg2, fcntl_flags_tbl),
531 unlock_user(p, arg1, 0);
533 case TARGET_OPENBSD_NR_mmap:
534 ret = get_errno(target_mmap(arg1, arg2, arg3,
535 target_to_host_bitmask(arg4, mmap_flags_tbl),
539 case TARGET_OPENBSD_NR_mprotect:
540 ret = get_errno(target_mprotect(arg1, arg2, arg3));
542 case TARGET_OPENBSD_NR_syscall:
543 case TARGET_OPENBSD_NR___syscall:
544 ret = do_openbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
547 ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
552 gemu_log(" = %ld\n", ret);
555 print_openbsd_syscall_ret(num, ret);
558 ret = -TARGET_EFAULT;
562 void syscall_init(void)