root/Whitix/trunk/include/sys.h

/*  This file is part of Whitix.
 *
 *  Whitix 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.
 *
 *  Whitix 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 Whitix; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef SYS_H
#define SYS_H

#include <typedefs.h>
#include <types.h>

struct SysCall
{
        DWORD addr;
        DWORD numBytes;
};

/* System call offsets. */

#define SYS_FS_BASE                             0
#define SYS_MMAP_BASE                   25
#define SYS_SHMEM_BASE                  29
#define SYS_THREAD_BASE                 33
#define SYS_LOAD_BASE                   38
#define SYS_PROCESS_BASE                39

#define SYS_SCHED_BASE                  42
#define SYS_TIME_BASE                   43
#define NET_SYS_BASE                    44
#define SYS_MODULE_BASE                 53
#define SYS_CONFIG_BASE                 55
#define SYS_SHUTDOWN_BASE               57
#define SYS_IO_BASE                             58

#define SYS_TLS_BASE                    59
#define SYS_SAVE_BASE                   60
#define SYSCALL_MAX             61

#define SysEntry(addr, bytes) { (DWORD)addr, bytes }
#define SysEntryEnd() SysEntry(0, 0)

void SysRegisterCall(int index, struct SysCall* call);
void SysRegisterRange(int index, struct SysCall* calls);

extern struct SysCall sysCallTable[SYSCALL_MAX];

__attribute__((fastcall))
static inline addr_t SysGetCall(DWORD index, DWORD argBytes)
{
        if (index >= SYSCALL_MAX)
                return 0;

        /* The number of argument bytes past can be greater than the number of bytes
         * needed by the function's parameters; it allows for future compatability.
         */
         
        if (sysCallTable[index].numBytes < argBytes)
                return 0;

        return sysCallTable[index].addr;
}

#endif