Hi all,
i write a program under nios2 using assemble lanauge, following is the source code
# include <linux/module.h># include <linux/kernel.h>
void print(void)
{
printk("function print\n");
}
typedef void(*pointer)(void);
ulong code[3];
void jump(void)
{
__asm__("movia r12, print");
__asm__("jmp r12");
}
int __init init_filter(void)
{
jump();
}
void __exit exit_filter(void)
{
}
module_init(init_filter);
module_exit(exit_filter);
this can work well, but if i change the function init_filter as bellow, the system will reboot,
int __init init_filter(void)
{
pointer p;
code[0]=0x03000034;
code[1]=0x63000004;
code[2]=0x6000683a;
p = (pointer)code;
p();
}
code[0]~code[2] is the hex value that i get from nios2-elf-objdump according to two assemble sentences.
how should i do?
thanks a lot
