Archipelago » qemu

/*

 *  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, write to the Free Software

 *  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

 *  MA 02110-1301, USA.

 */

#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 <signal.h>

#include <utime.h>

#include "qemu.h"

#include "qemu-common.h"

//#define DEBUG

static abi_ulong target_brk;

static abi_ulong target_original_brk;

#define get_errno(x) (x)

#define target_to_host_bitmask(x, tbl) (x)

void target_set_brk(abi_ulong new_brk)

{

    target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);

}

/* 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 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 HAVE_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_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_syscall:

    case TARGET_FREEBSD_NR___syscall:

        ret = do_freebsd_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_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 HAVE_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 HAVE_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)

{

}