DragonOS-Community/DragonOS
4
1
Fork 0
mirror of https://github.com/DragonOS-Community/DragonOS.git synced 2025-06-19 04:56:30 +00:00
Code Issues Releases Wiki Activity

进入用户模式（系统调用存在page fault的bug）

Browse Source
This commit is contained in:
fslongjin
2022-04-11 10:32:39 +08:00
parent c09c6d4e66
commit dacc29310f
9 changed files with 96 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
kernel/syscall/syscall.c
View File

@ -26,9 +26,11 @@ void syscall_init()
wrmsr(0x174, KERNEL_CS);
// 向MSR寄存器组中的 IA32_SYSENTER_ESP寄存器写入内核进程的rbp（在syscall入口中会将rsp减去相应的数值）
wrmsr(0x175, current_pcb->thread->rbp);
// 向MSR寄存器组中的 IA32_SYSENTER_EIP寄存器写入系统调用入口的地址。
wrmsr(0x176, (ul)system_call);
}
long enter_syscall(ul syscall_id, ul arg0, ul arg1, ul arg2, ul arg3, ul arg4, ul arg5, ul arg6, ul arg7)
@ -65,10 +67,11 @@ long enter_syscall(ul syscall_id, ul arg0, ul arg1, ul arg2, ul arg3, ul arg4, u
*/
ul sys_printf(struct pt_regs *regs)
{
while(1);
if(regs->r9 == 0 &&regs->r10 == 0)
printk((char*)regs->r8);
else printk_color(regs->r9, regs->r10, (char*)regs->r8);
//if(regs->r9 == 0 &&regs->r10 == 0)
// printk((char*)regs->r8);
//else printk_color(regs->r9, regs->r10, (char*)regs->r8);
printk_color(BLACK,WHITE,(char *)regs->rdi);
return 0;
}