--- /dev/null
+/*
+ * BSD syscalls
+ *
+ * Copyright (c) 2003 - 2008 Fabrice Bellard
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <time.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/syscall.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <utime.h>
+
+#include "qemu.h"
+#include "qemu-common.h"
+
+//#define DEBUG
+
+static abi_ulong target_brk;
+static abi_ulong target_original_brk;
+
+static inline abi_long get_errno(abi_long ret)
+{
+ if (ret == -1)
+ /* XXX need to translate host -> target errnos here */
+ return -(errno);
+ else
+ return ret;
+}
+
+#define target_to_host_bitmask(x, tbl) (x)
+
+static inline int is_error(abi_long ret)
+{
+ return (abi_ulong)ret >= (abi_ulong)(-4096);
+}
+
+void target_set_brk(abi_ulong new_brk)
+{
+ target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);
+}
+
+/* do_obreak() must return target errnos. */
+static abi_long do_obreak(abi_ulong new_brk)
+{
+ abi_ulong brk_page;
+ abi_long mapped_addr;
+ int new_alloc_size;
+
+ if (!new_brk)
+ return 0;
+ if (new_brk < target_original_brk)
+ return -TARGET_EINVAL;
+
+ brk_page = HOST_PAGE_ALIGN(target_brk);
+
+ /* If the new brk is less than this, set it and we're done... */
+ if (new_brk < brk_page) {
+ target_brk = new_brk;
+ return 0;
+ }
+
+ /* We need to allocate more memory after the brk... */
+ new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page + 1);
+ mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,
+ PROT_READ|PROT_WRITE,
+ MAP_ANON|MAP_FIXED|MAP_PRIVATE, -1, 0));
+
+ if (!is_error(mapped_addr))
+ target_brk = new_brk;
+ else
+ return mapped_addr;
+
+ return 0;
+}
+
+#if defined(TARGET_I386)
+static abi_long do_freebsd_sysarch(CPUX86State *env, int op, abi_ulong parms)
+{
+ abi_long ret = 0;
+ abi_ulong val;
+ int idx;
+
+ switch(op) {
+#ifdef TARGET_ABI32
+ case TARGET_FREEBSD_I386_SET_GSBASE:
+ case TARGET_FREEBSD_I386_SET_FSBASE:
+ if (op == TARGET_FREEBSD_I386_SET_GSBASE)
+#else
+ case TARGET_FREEBSD_AMD64_SET_GSBASE:
+ case TARGET_FREEBSD_AMD64_SET_FSBASE:
+ if (op == TARGET_FREEBSD_AMD64_SET_GSBASE)
+#endif
+ idx = R_GS;
+ else
+ idx = R_FS;
+ if (get_user(val, parms, abi_ulong))
+ return -TARGET_EFAULT;
+ cpu_x86_load_seg(env, idx, 0);
+ env->segs[idx].base = val;
+ break;
+#ifdef TARGET_ABI32
+ case TARGET_FREEBSD_I386_GET_GSBASE:
+ case TARGET_FREEBSD_I386_GET_FSBASE:
+ if (op == TARGET_FREEBSD_I386_GET_GSBASE)
+#else
+ case TARGET_FREEBSD_AMD64_GET_GSBASE:
+ case TARGET_FREEBSD_AMD64_GET_FSBASE:
+ if (op == TARGET_FREEBSD_AMD64_GET_GSBASE)
+#endif
+ idx = R_GS;
+ else
+ idx = R_FS;
+ val = env->segs[idx].base;
+ if (put_user(val, parms, abi_ulong))
+ return -TARGET_EFAULT;
+ break;
+ /* XXX handle the others... */
+ default:
+ ret = -TARGET_EINVAL;
+ break;
+ }
+ return ret;
+}
+#endif
+
+#ifdef TARGET_SPARC
+static abi_long do_freebsd_sysarch(void *env, int op, abi_ulong parms)
+{
+ /* XXX handle
+ * TARGET_FREEBSD_SPARC_UTRAP_INSTALL,
+ * TARGET_FREEBSD_SPARC_SIGTRAMP_INSTALL
+ */
+ return -TARGET_EINVAL;
+}
+#endif
+
+#ifdef __FreeBSD__
+/*
+ * XXX this uses the undocumented oidfmt interface to find the kind of
+ * a requested sysctl, see /sys/kern/kern_sysctl.c:sysctl_sysctl_oidfmt()
+ * (this is mostly copied from src/sbin/sysctl/sysctl.c)
+ */
+static int
+oidfmt(int *oid, int len, char *fmt, uint32_t *kind)
+{
+ int qoid[CTL_MAXNAME+2];
+ uint8_t buf[BUFSIZ];
+ int i;
+ size_t j;
+
+ qoid[0] = 0;
+ qoid[1] = 4;
+ memcpy(qoid + 2, oid, len * sizeof(int));
+
+ j = sizeof(buf);
+ i = sysctl(qoid, len + 2, buf, &j, 0, 0);
+ if (i)
+ return i;
+
+ if (kind)
+ *kind = *(uint32_t *)buf;
+
+ if (fmt)
+ strcpy(fmt, (char *)(buf + sizeof(uint32_t)));
+ return (0);
+}
+
+/*
+ * try and convert sysctl return data for the target.
+ * XXX doesn't handle CTLTYPE_OPAQUE and CTLTYPE_STRUCT.
+ */
+static int sysctl_oldcvt(void *holdp, size_t holdlen, uint32_t kind)
+{
+ switch (kind & CTLTYPE) {
+ case CTLTYPE_INT:
+ case CTLTYPE_UINT:
+ *(uint32_t *)holdp = tswap32(*(uint32_t *)holdp);
+ break;
+#ifdef TARGET_ABI32
+ case CTLTYPE_LONG:
+ case CTLTYPE_ULONG:
+ *(uint32_t *)holdp = tswap32(*(long *)holdp);
+ break;
+#else
+ case CTLTYPE_LONG:
+ *(uint64_t *)holdp = tswap64(*(long *)holdp);
+ case CTLTYPE_ULONG:
+ *(uint64_t *)holdp = tswap64(*(unsigned long *)holdp);
+ break;
+#endif
+#ifdef CTLTYPE_U64
+ case CTLTYPE_S64:
+ case CTLTYPE_U64:
+#else
+ case CTLTYPE_QUAD:
+#endif
+ *(uint64_t *)holdp = tswap64(*(uint64_t *)holdp);
+ break;
+ case CTLTYPE_STRING:
+ break;
+ default:
+ /* XXX unhandled */
+ return -1;
+ }
+ return 0;
+}
+
+/* XXX this needs to be emulated on non-FreeBSD hosts... */
+static abi_long do_freebsd_sysctl(abi_ulong namep, int32_t namelen, abi_ulong oldp,
+ abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen)
+{
+ abi_long ret;
+ void *hnamep, *holdp, *hnewp = NULL;
+ size_t holdlen;
+ abi_ulong oldlen = 0;
+ int32_t *snamep = g_malloc(sizeof(int32_t) * namelen), *p, *q, i;
+ uint32_t kind = 0;
+
+ if (oldlenp)
+ get_user_ual(oldlen, oldlenp);
+ if (!(hnamep = lock_user(VERIFY_READ, namep, namelen, 1)))
+ return -TARGET_EFAULT;
+ if (newp && !(hnewp = lock_user(VERIFY_READ, newp, newlen, 1)))
+ return -TARGET_EFAULT;
+ if (!(holdp = lock_user(VERIFY_WRITE, oldp, oldlen, 0)))
+ return -TARGET_EFAULT;
+ holdlen = oldlen;
+ for (p = hnamep, q = snamep, i = 0; i < namelen; p++, i++)
+ *q++ = tswap32(*p);
+ oidfmt(snamep, namelen, NULL, &kind);
+ /* XXX swap hnewp */
+ ret = get_errno(sysctl(snamep, namelen, holdp, &holdlen, hnewp, newlen));
+ if (!ret)
+ sysctl_oldcvt(holdp, holdlen, kind);
+ put_user_ual(holdlen, oldlenp);
+ unlock_user(hnamep, namep, 0);
+ unlock_user(holdp, oldp, holdlen);
+ if (hnewp)
+ unlock_user(hnewp, newp, 0);
+ g_free(snamep);
+ return ret;
+}
+#endif
+
+/* FIXME
+ * lock_iovec()/unlock_iovec() have a return code of 0 for success where
+ * other lock functions have a return code of 0 for failure.
+ */
+static abi_long lock_iovec(int type, struct iovec *vec, abi_ulong target_addr,
+ int count, int copy)
+{
+ struct target_iovec *target_vec;
+ abi_ulong base;
+ int i;
+
+ target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
+ if (!target_vec)
+ return -TARGET_EFAULT;
+ for(i = 0;i < count; i++) {
+ base = tswapl(target_vec[i].iov_base);
+ vec[i].iov_len = tswapl(target_vec[i].iov_len);
+ if (vec[i].iov_len != 0) {
+ vec[i].iov_base = lock_user(type, base, vec[i].iov_len, copy);
+ /* Don't check lock_user return value. We must call writev even
+ if a element has invalid base address. */
+ } else {
+ /* zero length pointer is ignored */
+ vec[i].iov_base = NULL;
+ }
+ }
+ unlock_user (target_vec, target_addr, 0);
+ return 0;
+}
+
+static abi_long unlock_iovec(struct iovec *vec, abi_ulong target_addr,
+ int count, int copy)
+{
+ struct target_iovec *target_vec;
+ abi_ulong base;
+ int i;
+
+ target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
+ if (!target_vec)
+ return -TARGET_EFAULT;
+ for(i = 0;i < count; i++) {
+ if (target_vec[i].iov_base) {
+ base = tswapl(target_vec[i].iov_base);
+ unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0);
+ }
+ }
+ unlock_user (target_vec, target_addr, 0);
+
+ return 0;
+}
+
+/* do_syscall() should always have a single exit point at the end so
+ that actions, such as logging of syscall results, can be performed.
+ All errnos that do_syscall() returns must be -TARGET_<errcode>. */
+abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
+ abi_long arg2, abi_long arg3, abi_long arg4,
+ abi_long arg5, abi_long arg6, abi_long arg7,
+ abi_long arg8)
+{
+ abi_long ret;
+ void *p;
+
+#ifdef DEBUG
+ gemu_log("freebsd syscall %d\n", num);
+#endif
+ if(do_strace)
+ print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
+
+ switch(num) {
+ case TARGET_FREEBSD_NR_exit:
+#ifdef TARGET_GPROF
+ _mcleanup();
+#endif
+ gdb_exit(cpu_env, arg1);
+ /* XXX: should free thread stack and CPU env */
+ _exit(arg1);
+ ret = 0; /* avoid warning */
+ break;
+ case TARGET_FREEBSD_NR_read:
+ if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
+ goto efault;
+ ret = get_errno(read(arg1, p, arg3));
+ unlock_user(p, arg2, ret);
+ break;
+ case TARGET_FREEBSD_NR_write:
+ if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
+ goto efault;
+ ret = get_errno(write(arg1, p, arg3));
+ unlock_user(p, arg2, 0);
+ break;
+ case TARGET_FREEBSD_NR_writev:
+ {
+ int count = arg3;
+ struct iovec *vec;
+
+ vec = alloca(count * sizeof(struct iovec));
+ if (lock_iovec(VERIFY_READ, vec, arg2, count, 1) < 0)
+ goto efault;
+ ret = get_errno(writev(arg1, vec, count));
+ unlock_iovec(vec, arg2, count, 0);
+ }
+ break;
+ case TARGET_FREEBSD_NR_open:
+ if (!(p = lock_user_string(arg1)))
+ goto efault;
+ ret = get_errno(open(path(p),
+ target_to_host_bitmask(arg2, fcntl_flags_tbl),
+ arg3));
+ unlock_user(p, arg1, 0);
+ break;
+ case TARGET_FREEBSD_NR_mmap:
+ ret = get_errno(target_mmap(arg1, arg2, arg3,
+ target_to_host_bitmask(arg4, mmap_flags_tbl),
+ arg5,
+ arg6));
+ break;
+ case TARGET_FREEBSD_NR_mprotect:
+ ret = get_errno(target_mprotect(arg1, arg2, arg3));
+ break;
+ case TARGET_FREEBSD_NR_break:
+ ret = do_obreak(arg1);
+ break;
+#ifdef __FreeBSD__
+ case TARGET_FREEBSD_NR___sysctl:
+ ret = do_freebsd_sysctl(arg1, arg2, arg3, arg4, arg5, arg6);
+ break;
+#endif
+ case TARGET_FREEBSD_NR_sysarch:
+ ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
+ break;
+ case TARGET_FREEBSD_NR_syscall:
+ case TARGET_FREEBSD_NR___syscall:
+ ret = do_freebsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,arg7,arg8,0);
+ break;
+ default:
+ ret = get_errno(syscall(num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8));
+ break;
+ }
+ fail:
+#ifdef DEBUG
+ gemu_log(" = %ld\n", ret);
+#endif
+ if (do_strace)
+ print_freebsd_syscall_ret(num, ret);
+ return ret;
+ efault:
+ ret = -TARGET_EFAULT;
+ goto fail;
+}
+
+abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
+ abi_long arg2, abi_long arg3, abi_long arg4,
+ abi_long arg5, abi_long arg6)
+{
+ abi_long ret;
+ void *p;
+
+#ifdef DEBUG
+ gemu_log("netbsd syscall %d\n", num);
+#endif
+ if(do_strace)
+ print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
+
+ switch(num) {
+ case TARGET_NETBSD_NR_exit:
+#ifdef TARGET_GPROF
+ _mcleanup();
+#endif
+ gdb_exit(cpu_env, arg1);
+ /* XXX: should free thread stack and CPU env */
+ _exit(arg1);
+ ret = 0; /* avoid warning */
+ break;
+ case TARGET_NETBSD_NR_read:
+ if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
+ goto efault;
+ ret = get_errno(read(arg1, p, arg3));
+ unlock_user(p, arg2, ret);
+ break;
+ case TARGET_NETBSD_NR_write:
+ if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
+ goto efault;
+ ret = get_errno(write(arg1, p, arg3));
+ unlock_user(p, arg2, 0);
+ break;
+ case TARGET_NETBSD_NR_open:
+ if (!(p = lock_user_string(arg1)))
+ goto efault;
+ ret = get_errno(open(path(p),
+ target_to_host_bitmask(arg2, fcntl_flags_tbl),
+ arg3));
+ unlock_user(p, arg1, 0);
+ break;
+ case TARGET_NETBSD_NR_mmap:
+ ret = get_errno(target_mmap(arg1, arg2, arg3,
+ target_to_host_bitmask(arg4, mmap_flags_tbl),
+ arg5,
+ arg6));
+ break;
+ case TARGET_NETBSD_NR_mprotect:
+ ret = get_errno(target_mprotect(arg1, arg2, arg3));
+ break;
+ case TARGET_NETBSD_NR_syscall:
+ case TARGET_NETBSD_NR___syscall:
+ ret = do_netbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
+ break;
+ default:
+ ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
+ break;
+ }
+ fail:
+#ifdef DEBUG
+ gemu_log(" = %ld\n", ret);
+#endif
+ if (do_strace)
+ print_netbsd_syscall_ret(num, ret);
+ return ret;
+ efault:
+ ret = -TARGET_EFAULT;
+ goto fail;
+}
+
+abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
+ abi_long arg2, abi_long arg3, abi_long arg4,
+ abi_long arg5, abi_long arg6)
+{
+ abi_long ret;
+ void *p;
+
+#ifdef DEBUG
+ gemu_log("openbsd syscall %d\n", num);
+#endif
+ if(do_strace)
+ print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
+
+ switch(num) {
+ case TARGET_OPENBSD_NR_exit:
+#ifdef TARGET_GPROF
+ _mcleanup();
+#endif
+ gdb_exit(cpu_env, arg1);
+ /* XXX: should free thread stack and CPU env */
+ _exit(arg1);
+ ret = 0; /* avoid warning */
+ break;
+ case TARGET_OPENBSD_NR_read:
+ if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
+ goto efault;
+ ret = get_errno(read(arg1, p, arg3));
+ unlock_user(p, arg2, ret);
+ break;
+ case TARGET_OPENBSD_NR_write:
+ if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
+ goto efault;
+ ret = get_errno(write(arg1, p, arg3));
+ unlock_user(p, arg2, 0);
+ break;
+ case TARGET_OPENBSD_NR_open:
+ if (!(p = lock_user_string(arg1)))
+ goto efault;
+ ret = get_errno(open(path(p),
+ target_to_host_bitmask(arg2, fcntl_flags_tbl),
+ arg3));
+ unlock_user(p, arg1, 0);
+ break;
+ case TARGET_OPENBSD_NR_mmap:
+ ret = get_errno(target_mmap(arg1, arg2, arg3,
+ target_to_host_bitmask(arg4, mmap_flags_tbl),
+ arg5,
+ arg6));
+ break;
+ case TARGET_OPENBSD_NR_mprotect:
+ ret = get_errno(target_mprotect(arg1, arg2, arg3));
+ break;
+ case TARGET_OPENBSD_NR_syscall:
+ case TARGET_OPENBSD_NR___syscall:
+ ret = do_openbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
+ break;
+ default:
+ ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
+ break;
+ }
+ fail:
+#ifdef DEBUG
+ gemu_log(" = %ld\n", ret);
+#endif
+ if (do_strace)
+ print_openbsd_syscall_ret(num, ret);
+ return ret;
+ efault:
+ ret = -TARGET_EFAULT;
+ goto fail;
+}
+
+void syscall_init(void)
+{
+}
Code Review / kvmfornfv.git / blobdiff