- 论坛徽章:
- 0
|
你的kernel支持cramfs不?
可以先做成cramfs试试
如果他没有去跑你的init,那应该是有两种可能
1.kernel ...
T-Bagwell 发表于 2010-10-22 16:55
不会做cramfs的,暂时用cpio的格式的包试了一下,结果一样,看了下fs/ext2的函数,不知道加到哪儿合适,
反过来去找run_init_process里面-->kernel_execve() 加了printk ,添加位置如下:
int kernel_execve(const char *filename, char *const argv[], char *const envp[])
{
struct pt_regs regs;
int ret;
printk(KERN_INFO "test point:arch/arm/kernel/sys_arm.c/kernel_execve(%s)",filename);
memset(®s, 0, sizeof(struct pt_regs));
ret = do_execve((char *)filename, (char __user * __user *)argv,
(char __user * __user *)envp, ®s);
printk(KERN_INFO "test point:ret = %d\n",ret);
if (ret < 0)
goto out;
printk(KERN_INFO "test point:%d\n",1);
/*
* Save argc to the register structure for userspace.
*/
regs.ARM_r0 = ret;
/*
* We were successful. We won't be returning to our caller, but
* instead to user space by manipulating the kernel stack.
*/
asm( "add r0, %0, %1\n\t"
"mov r1, %2\n\t"
"mov r2, %3\n\t"
"bl memmove\n\t" /* copy regs to top of stack */
"mov r8, #0\n\t" /* not a syscall */
"mov r9, %0\n\t" /* thread structure */
"mov sp, r0\n\t" /* reposition stack pointer */
"b ret_to_user"
:
: "r" (current_thread_info()),
"Ir" (THREAD_START_SP - sizeof(regs)),
"r" (®s),
"Ir" (sizeof(regs))
: "r0", "r1", "r2", "r3", "ip", "lr", "memory");
out:
printk(KERN_INFO "test point:%d\n",2);
return ret;
}
部分打印信息如下:
Driver for 1-wire Dallas network protocol.
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/sbin/hotplug)
test point:ret = -2
test point:2
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/sbin/hotplug)
test point:ret = -2
test point:2
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/sbin/hotplug)
test point:ret = -2
test point:2
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/sbin/hotplug)
test point:ret = -2
test point:2
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/sbin/hotplug)
test point:ret = -2
test point:2
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/sbin/hotplug)
test point:ret = -2
test point:2
TCP cubic registered
NET: Registered protocol family 17
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/sbin/hotplug)
test point:ret = -2
test point:2
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/sbin/hotplug)
test point:ret = -2
test point:2
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/sbin/hotplug)
test point:ret = -2
test point:2
Freeing init memory: 96K
test point:arch/arm/kernel/sys_arm.c/kernel_execve(/init)
test point:fs/exec.c/do_execve()
test point:ret = 0
test point:1
Kernel panic - not syncing: Attempted to kill init!
cpio格式的rootfs镜像默认启动/init ,我做的链接 /init --> /bin/busybox
从打印信息来看 系统对 busybox的 open_exec()成功
do_execve() 成功
应该是在汇编 "b ret_to_user" 后就没影儿了!
难道系统的内存映射有问题?不可能吧!
有什么办法试试到底是否执行了应用程序busybox呢? 在应用里面 printf 没反应啊 |
|