mirror of https://gitee.com/openkylin/qemu.git
275 lines
8.1 KiB
C
275 lines
8.1 KiB
C
/*
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* BSD syscalls
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*
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* Copyright (c) 2003 - 2008 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <time.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/syscall.h>
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#include <signal.h>
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#include <utime.h>
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#include "qemu.h"
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#include "qemu-common.h"
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//#define DEBUG
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static abi_ulong target_brk;
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static abi_ulong target_original_brk;
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#define get_errno(x) (x)
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#define target_to_host_bitmask(x, tbl) (x)
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void target_set_brk(abi_ulong new_brk)
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{
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target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);
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}
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/* do_syscall() should always have a single exit point at the end so
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that actions, such as logging of syscall results, can be performed.
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All errnos that do_syscall() returns must be -TARGET_<errcode>. */
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abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4,
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abi_long arg5, abi_long arg6)
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{
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abi_long ret;
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void *p;
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#ifdef DEBUG
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gemu_log("freebsd syscall %d\n", num);
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#endif
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if(do_strace)
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print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
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switch(num) {
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case TARGET_FREEBSD_NR_exit:
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#ifdef HAVE_GPROF
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_mcleanup();
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#endif
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gdb_exit(cpu_env, arg1);
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/* XXX: should free thread stack and CPU env */
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_exit(arg1);
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ret = 0; /* avoid warning */
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break;
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case TARGET_FREEBSD_NR_read:
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if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
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goto efault;
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ret = get_errno(read(arg1, p, arg3));
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unlock_user(p, arg2, ret);
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break;
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case TARGET_FREEBSD_NR_write:
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if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
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goto efault;
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ret = get_errno(write(arg1, p, arg3));
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unlock_user(p, arg2, 0);
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break;
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case TARGET_FREEBSD_NR_open:
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if (!(p = lock_user_string(arg1)))
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goto efault;
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ret = get_errno(open(path(p),
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target_to_host_bitmask(arg2, fcntl_flags_tbl),
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arg3));
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unlock_user(p, arg1, 0);
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break;
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case TARGET_FREEBSD_NR_mmap:
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ret = get_errno(target_mmap(arg1, arg2, arg3,
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target_to_host_bitmask(arg4, mmap_flags_tbl),
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arg5,
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arg6));
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break;
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case TARGET_FREEBSD_NR_mprotect:
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ret = get_errno(target_mprotect(arg1, arg2, arg3));
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break;
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case TARGET_FREEBSD_NR_syscall:
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case TARGET_FREEBSD_NR___syscall:
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ret = do_freebsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
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break;
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default:
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ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
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break;
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}
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fail:
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#ifdef DEBUG
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gemu_log(" = %ld\n", ret);
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#endif
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if (do_strace)
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print_freebsd_syscall_ret(num, ret);
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return ret;
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efault:
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ret = -TARGET_EFAULT;
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goto fail;
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}
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abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4,
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abi_long arg5, abi_long arg6)
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{
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abi_long ret;
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void *p;
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#ifdef DEBUG
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gemu_log("netbsd syscall %d\n", num);
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#endif
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if(do_strace)
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print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
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switch(num) {
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case TARGET_NETBSD_NR_exit:
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#ifdef HAVE_GPROF
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_mcleanup();
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#endif
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gdb_exit(cpu_env, arg1);
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/* XXX: should free thread stack and CPU env */
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_exit(arg1);
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ret = 0; /* avoid warning */
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break;
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case TARGET_NETBSD_NR_read:
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if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
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goto efault;
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ret = get_errno(read(arg1, p, arg3));
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unlock_user(p, arg2, ret);
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break;
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case TARGET_NETBSD_NR_write:
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if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
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goto efault;
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ret = get_errno(write(arg1, p, arg3));
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unlock_user(p, arg2, 0);
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break;
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case TARGET_NETBSD_NR_open:
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if (!(p = lock_user_string(arg1)))
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goto efault;
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ret = get_errno(open(path(p),
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target_to_host_bitmask(arg2, fcntl_flags_tbl),
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arg3));
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unlock_user(p, arg1, 0);
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break;
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case TARGET_NETBSD_NR_mmap:
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ret = get_errno(target_mmap(arg1, arg2, arg3,
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target_to_host_bitmask(arg4, mmap_flags_tbl),
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arg5,
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arg6));
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break;
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case TARGET_NETBSD_NR_mprotect:
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ret = get_errno(target_mprotect(arg1, arg2, arg3));
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break;
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case TARGET_NETBSD_NR_syscall:
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case TARGET_NETBSD_NR___syscall:
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ret = do_netbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
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break;
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default:
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ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
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break;
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}
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fail:
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#ifdef DEBUG
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gemu_log(" = %ld\n", ret);
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#endif
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if (do_strace)
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print_netbsd_syscall_ret(num, ret);
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return ret;
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efault:
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ret = -TARGET_EFAULT;
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goto fail;
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}
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abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4,
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abi_long arg5, abi_long arg6)
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{
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abi_long ret;
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void *p;
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#ifdef DEBUG
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gemu_log("openbsd syscall %d\n", num);
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#endif
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if(do_strace)
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print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
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switch(num) {
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case TARGET_OPENBSD_NR_exit:
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#ifdef HAVE_GPROF
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_mcleanup();
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#endif
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gdb_exit(cpu_env, arg1);
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/* XXX: should free thread stack and CPU env */
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_exit(arg1);
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ret = 0; /* avoid warning */
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break;
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case TARGET_OPENBSD_NR_read:
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if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
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goto efault;
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ret = get_errno(read(arg1, p, arg3));
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unlock_user(p, arg2, ret);
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break;
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case TARGET_OPENBSD_NR_write:
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if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
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goto efault;
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ret = get_errno(write(arg1, p, arg3));
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unlock_user(p, arg2, 0);
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break;
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case TARGET_OPENBSD_NR_open:
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if (!(p = lock_user_string(arg1)))
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goto efault;
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ret = get_errno(open(path(p),
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target_to_host_bitmask(arg2, fcntl_flags_tbl),
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arg3));
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unlock_user(p, arg1, 0);
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break;
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case TARGET_OPENBSD_NR_mmap:
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ret = get_errno(target_mmap(arg1, arg2, arg3,
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target_to_host_bitmask(arg4, mmap_flags_tbl),
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arg5,
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arg6));
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break;
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case TARGET_OPENBSD_NR_mprotect:
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ret = get_errno(target_mprotect(arg1, arg2, arg3));
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break;
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case TARGET_OPENBSD_NR_syscall:
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case TARGET_OPENBSD_NR___syscall:
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ret = do_openbsd_syscall(cpu_env,arg1 & 0xffff,arg2,arg3,arg4,arg5,arg6,0);
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break;
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default:
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ret = syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
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break;
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}
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fail:
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#ifdef DEBUG
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gemu_log(" = %ld\n", ret);
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#endif
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if (do_strace)
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print_openbsd_syscall_ret(num, ret);
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return ret;
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efault:
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ret = -TARGET_EFAULT;
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goto fail;
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}
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void syscall_init(void)
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{
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}
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