63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
|
#pragma once
|
|||
|
|
|
|||
|
|
#include "../common/glib.h"
|
|||
|
|
#include "../common/kprint.h"
|
|||
|
|
#include "../process/ptrace.h"
|
|||
|
|
|
|||
|
|
// 定义最大系统调用数量
|
|||
|
|
#define MAX_SYSTEM_CALL_NUM 128
|
|||
|
|
|
|||
|
|
#define ESYSCALL_NOT_EXISTS 1
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
typedef unsigned long (*system_call_t)(struct pt_regs *regs);
|
|||
|
|
|
|||
|
|
extern void ret_from_system_call(void); // 导出从系统调用返回的函数（定义在entry.S）
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @brief 初始化系统调用模块
|
|||
|
|
*
|
|||
|
|
*/
|
|||
|
|
void syscall_init();
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @brief 用户态系统调用入口函数
|
|||
|
|
* 从用户态进入系统调用
|
|||
|
|
* @param syscall_id 系统调用id
|
|||
|
|
* @return long 错误码
|
|||
|
|
*/
|
|||
|
|
long enter_syscall(ul syscall_id,ul arg0, ul arg1, ul arg2, ul arg3, ul arg4, ul arg5, ul arg6, ul arg7);
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @brief 系统调用不存在时的处理函数
|
|||
|
|
*
|
|||
|
|
* @param regs 进程3特权级下的寄存器
|
|||
|
|
* @return ul
|
|||
|
|
*/
|
|||
|
|
ul system_call_not_exists(struct pt_regs *regs)
|
|||
|
|
{
|
|||
|
|
kerror("System call [ ID #%d ] not exists.", regs->rax);
|
|||
|
|
return ESYSCALL_NOT_EXISTS;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @brief 打印字符串的系统调用
|
|||
|
|
*
|
|||
|
|
* 当arg1和arg2均为0时，打印黑底白字，否则按照指定的前景色和背景色来打印
|
|||
|
|
*
|
|||
|
|
* @param regs 寄存器
|
|||
|
|
* @param arg0 要打印的字符串
|
|||
|
|
* @param arg1 前景色
|
|||
|
|
* @param arg2 背景色
|
|||
|
|
* @return ul 返回值
|
|||
|
|
*/
|
|||
|
|
ul sys_printf(struct pt_regs *regs);
|
|||
|
|
|
|||
|
|
system_call_t system_call_table[MAX_SYSTEM_CALL_NUM] =
|
|||
|
|
{
|
|||
|
|
[0] = system_call_not_exists,
|
|||
|
|
[1] = sys_printf,
|
|||
|
|
[2 ... MAX_SYSTEM_CALL_NUM - 1] = system_call_not_exists
|
|||
|
|
};
|