Hi all, I am getting the following error while building using ARMV7 toolchain.
{standard input}:599: Error: selected processor does not support `ldrex r1,[r2]' {standard input}:601: Error: selected processor does not support `strex r3,r1,[r2]'
For example the following code uses strex and ldrex but it is not specified which register to use. atomic_inc in turn uses ->
static inline int atomic_add_return(int i, atomic_t *v) { unsigned long tmp; int result;
__asm__ __volatile__("@ atomic_add_return\n" "1: ldrex %0, [%2]\n" " add %0, %0, %3\n" " strex %1, %0, [%2]\n" " teq %1, #0\n" " bne 1b" : "=&r" (result), "=&r" (tmp) : "r" (&v->counter), "Ir" (i) : "cc");
return result; }
According to arm architecture reference manual strex/ldrex are valid for ARMV6 and above.
The above code i copied from kernel and it is building in kernel.
I dont know how to solve this issue Any toolchain specific CFLAGS/attributes i need to set/unset. Please Help
Warm Regards, Akshay
Yahoo! India has a new look. Take a sneak peek http://in.yahoo.com/trynew