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Code Issues Releases Wiki Activity

改用int250作为系统调用

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This commit is contained in:
fslongjin
2022-04-12 11:54:44 +08:00
parent 011246281a
commit 2d7b2b7048
15 changed files with 236 additions and 104 deletions
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15
kernel/syscall/syscall.h
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@ -9,8 +9,6 @@
#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）
@ -27,7 +25,8 @@ void syscall_init();
* @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);
long enter_syscall(ul syscall_id, ul arg0, ul arg1, ul arg2, ul arg3, ul arg4, ul arg5, ul arg6, ul arg7);
ul enter_syscall_int(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
@ -43,9 +42,9 @@ ul system_call_not_exists(struct pt_regs *regs)
/**
* @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
@ -54,9 +53,11 @@ ul system_call_not_exists(struct pt_regs *regs)
*/
ul sys_printf(struct pt_regs *regs);
// 系统调用的内核入口程序
void do_syscall_int(struct pt_regs *regs, unsigned long error_code);
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
};
[2 ... MAX_SYSTEM_CALL_NUM - 1] = system_call_not_exists};