system_call.c

来自「一个用于学习的操作系统」· C语言 代码 · 共 52 行

#include <fairysky/defs.h>
#include <fairysky/types.h>
#include <fairysky/kernel.h>
#include <asm/system.h>
#include <fairysky/string.h>
#include <fairysky/scheduler.h>
#include <fairysky/system_call.h>
#include <fairysky/unistd.h>

typedef int (*fun_system_call)();

#ifdef WINDOWS_CYGWIN
    #define SYSTEM_CALLS system_calls
#else
    #define SYSTEM_CALLS _system_calls
#endif

#define BEGIN_SYSTEM_CALLS \
    fun_system_call SYSTEM_CALLS[] = {

#define END_SYSTEM_CALLS \
        NULL \
    };

#define SYSTEM_CALL(index, system_call) \
    (fun_system_call)system_call,


void sys_print_msg(char *msg)
{
    printk("%s", msg);
    return;
}

s32 sys_exit()
{
    return -1;
}

BEGIN_SYSTEM_CALLS
    SYSTEM_CALL(0, sys_setup)
    SYSTEM_CALL(1, sys_exit)
    SYSTEM_CALL(2, sys_fork)
    SYSTEM_CALL(3, sys_read)
    SYSTEM_CALL(4, sys_write)
    SYSTEM_CALL(5, sys_open)
    SYSTEM_CALL(6, sys_close)
    SYSTEM_CALL(7, sys_print_msg)
    SYSTEM_CALL(8, sys_show_state)
END_SYSTEM_CALLS