| /* |
| * 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 "qemu/osdep.h" |
| #include "qemu/cutils.h" |
| #include "qemu/path.h" |
| #include <sys/syscall.h> |
| #include <sys/param.h> |
| #include <sys/sysctl.h> |
| #include <utime.h> |
| |
| #include "qemu.h" |
| #include "qemu-common.h" |
| #include "user/syscall-trace.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); |
| break; |
| 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) |
| { |
| CPUState *cpu = env_cpu(cpu_env); |
| abi_long ret; |
| void *p; |
| |
| #ifdef DEBUG |
| gemu_log("freebsd syscall %d\n", num); |
| #endif |
| record_syscall_start(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0); |
| |
| if (do_strace) |
| print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); |
| |
| switch (num) { |
| case TARGET_FREEBSD_NR_exit: |
| #ifdef CONFIG_GPROF |
| _mcleanup(); |
| #endif |
| gdb_exit(arg1); |
| qemu_plugin_user_exit(); |
| /* 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); |
| |
| record_syscall_return(cpu, 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) |
| { |
| CPUState *cpu = env_cpu(cpu_env); |
| abi_long ret; |
| void *p; |
| |
| #ifdef DEBUG |
| gemu_log("netbsd syscall %d\n", num); |
| #endif |
| |
| record_syscall_start(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0); |
| |
| if (do_strace) |
| print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); |
| |
| switch (num) { |
| case TARGET_NETBSD_NR_exit: |
| #ifdef CONFIG_GPROF |
| _mcleanup(); |
| #endif |
| gdb_exit(arg1); |
| qemu_plugin_user_exit(); |
| /* 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); |
| |
| record_syscall_return(cpu, 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) |
| { |
| CPUState *cpu = env_cpu(cpu_env); |
| abi_long ret; |
| void *p; |
| |
| #ifdef DEBUG |
| gemu_log("openbsd syscall %d\n", num); |
| #endif |
| |
| record_syscall_start(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0); |
| |
| if (do_strace) |
| print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6); |
| |
| switch (num) { |
| case TARGET_OPENBSD_NR_exit: |
| #ifdef CONFIG_GPROF |
| _mcleanup(); |
| #endif |
| gdb_exit(arg1); |
| qemu_plugin_user_exit(); |
| /* 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); |
| |
| record_syscall_return(cpu, num, ret); |
| return ret; |
| efault: |
| ret = -TARGET_EFAULT; |
| goto fail; |
| } |
| |
| void syscall_init(void) |
| { |
| } |
