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
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