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Code Issues Releases Wiki Activity

能进入用户态程序，但无法正确进行系统调用

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This commit is contained in:
fslongjin
2022-04-10 23:53:07 +08:00
parent d78db8225c
commit c09c6d4e66
6 changed files with 19 additions and 10 deletions
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16
kernel/process/process.c
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@ -51,10 +51,18 @@ void user_level_function()
// kinfo("Program (user_level_function) is runing...");
// kinfo("Try to enter syscall id 15...");
// enter_syscall(15, 0, 0, 0, 0, 0, 0, 0, 0);
hlt();
enter_syscall(SYS_PRINTF, (ul) "test_sys_printf\n", 0, 0, 0, 0, 0, 0, 0);
//enter_syscall(SYS_PRINTF, (ul) "test_sys_printf\n", 0, 0, 0, 0, 0, 0, 0);
long ret = 0;
// color_printk(RED,BLACK,"user_level_function task is running\n");
char string[]="Hello World!\n";
kinfo("Return from syscall id 15...");
__asm__ __volatile__ ( "leaq sysexit_return_address(%%rip), %%rdx \n\t"
"movq %%rsp, %%rcx \n\t"
"sysenter \n\t"
"sysexit_return_address: \n\t"
:"=a"(ret):"0"(1),"D"(string):"memory");
//kinfo("Return from syscall id 15...");
while (1)
;
@ -83,7 +91,7 @@ ul do_execve(struct pt_regs *regs)
uint64_t addr = 0x800000UL;
unsigned long * tmp = phys_2_virt((unsigned long *)((unsigned long)get_CR3() & (~0xfffUL)) + (( addr>> PAGE_GDT_SHIFT) & 0x1ff));
unsigned long * virtual = kmalloc(PAGE_4K_SIZE, 0);
set_pml4t(tmp, mk_pml4t(virt_2_phys(virtual), PAGE_USER_PGT));