[U-Boot] Can not access global variable in uboot command function?

[wilbur.chan]

mips64 , xlr732


I've added a test command in uboot, say,
U_BOOT_CMD(test_globa,...do_test_global)  ,which is  in cmd_command.c
.


And in cmd_command.c, there is also a global string array ,say ,char*
p = "test";




In do_test_global,  I used pointer to access elements of array p like this:

char c = *(char*)p;

it seemd that , the code above caused uboot dead and print nothing ,I
guess that,maybe there was a memory access violation.

Any suggestions on how could this happended? Thank you in advance





my code is like this:

/* cmd_command.c*/

char* p = "test";

U_BOOT_CMD(test_globa,do_test_global)  ;

int do_test_global()
{
char c = *(char*)p;    //when called , uboot was dead here...
return 0;
}