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bugfix: 修复sys_wait4中，当status指针为NULL时的错误。

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This commit is contained in:
fslongjin 2022-07-31 17:06:37 +08:00
parent a02acbdbe6
commit b98a3679c9
1 changed files with 7 additions and 10 deletions
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17
kernel/syscall/syscall.c
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@ -16,8 +16,7 @@
extern void system_call(void);
extern void syscall_int(void);
extern uint64_t sys_clock(struct pt_regs* regs);
extern uint64_t sys_clock(struct pt_regs *regs);
/**
* @brief 导出系统调用处理函数的符号
@ -166,7 +165,7 @@ uint64_t sys_open(struct pt_regs *regs)
// kdebug("tmp_index=%d", tmp_index);
if (tmp_index > 0)
{
path[tmp_index] = '\0';
dentry = vfs_path_walk(path, 0);
if (dentry == NULL)
@ -470,8 +469,6 @@ uint64_t sys_brk(struct pt_regs *regs)
else
offset = -(int64_t)(current_pcb->mm->brk_end - new_brk);
new_brk = mm_do_brk(current_pcb->mm->brk_end, offset); // 扩展堆内存空间
current_pcb->mm->brk_end = new_brk;
@ -705,7 +702,8 @@ uint64_t sys_wait4(struct pt_regs *regs)
wait_queue_sleep_on_interriptible(&current_pcb->wait_child_proc_exit);
// 拷贝子进程的返回码
*status = child_proc->exit_code;
if (likely(status != NULL))
*status = child_proc->exit_code;
// copy_to_user(status, (void*)child_proc->exit_code, sizeof(int));
proc->next_pcb = child_proc->next_pcb;
@ -727,11 +725,10 @@ uint64_t sys_exit(struct pt_regs *regs)
return process_do_exit(regs->r8);
}
uint64_t sys_nanosleep(struct pt_regs * regs)
uint64_t sys_nanosleep(struct pt_regs *regs)
{
const struct timespec * rqtp = (const struct timespec*)regs->r8;
struct timespec * rmtp = (struct timespec*)regs->r9;
const struct timespec *rqtp = (const struct timespec *)regs->r8;
struct timespec *rmtp = (struct timespec *)regs->r9;
return nanosleep(rqtp, rmtp);
}