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