mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
powerpc: Fix load/store float double alignment handler
When we introduced VSX, we changed the way FPRs are stored in the thread_struct. Unfortunately we missed the load/store float double alignment handler code when updating how we access FPRs in the thread_struct. Below fixes this and merges the little/big endian case. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
parent
545bba1824
commit
553631e25f
@ -367,27 +367,24 @@ static int emulate_multiple(struct pt_regs *regs, unsigned char __user *addr,
|
||||
static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg,
|
||||
unsigned int flags)
|
||||
{
|
||||
char *ptr = (char *) ¤t->thread.TS_FPR(reg);
|
||||
int i, ret;
|
||||
char *ptr0 = (char *) ¤t->thread.TS_FPR(reg);
|
||||
char *ptr1 = (char *) ¤t->thread.TS_FPR(reg+1);
|
||||
int i, ret, sw = 0;
|
||||
|
||||
if (!(flags & F))
|
||||
return 0;
|
||||
if (reg & 1)
|
||||
return 0; /* invalid form: FRS/FRT must be even */
|
||||
if (!(flags & SW)) {
|
||||
/* not byte-swapped - easy */
|
||||
if (!(flags & ST))
|
||||
ret = __copy_from_user(ptr, addr, 16);
|
||||
else
|
||||
ret = __copy_to_user(addr, ptr, 16);
|
||||
} else {
|
||||
/* each FPR value is byte-swapped separately */
|
||||
ret = 0;
|
||||
for (i = 0; i < 16; ++i) {
|
||||
if (!(flags & ST))
|
||||
ret |= __get_user(ptr[i^7], addr + i);
|
||||
else
|
||||
ret |= __put_user(ptr[i^7], addr + i);
|
||||
if (flags & SW)
|
||||
sw = 7;
|
||||
ret = 0;
|
||||
for (i = 0; i < 8; ++i) {
|
||||
if (!(flags & ST)) {
|
||||
ret |= __get_user(ptr0[i^sw], addr + i);
|
||||
ret |= __get_user(ptr1[i^sw], addr + i + 8);
|
||||
} else {
|
||||
ret |= __put_user(ptr0[i^sw], addr + i);
|
||||
ret |= __put_user(ptr1[i^sw], addr + i + 8);
|
||||
}
|
||||
}
|
||||
if (ret)
|
||||
|
Loading…
Reference in New Issue
Block a user