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Diffstat (limited to 'arch/powerpc/kernel/align.c')
-rw-r--r--arch/powerpc/kernel/align.c36
1 files changed, 19 insertions, 17 deletions
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index 5af4e9b2dbe2..73cb6a3229ae 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -367,27 +367,24 @@ static int emulate_multiple(struct pt_regs *regs, unsigned char __user *addr,
367static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg, 367static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg,
368 unsigned int flags) 368 unsigned int flags)
369{ 369{
370 char *ptr = (char *) &current->thread.TS_FPR(reg); 370 char *ptr0 = (char *) &current->thread.TS_FPR(reg);
371 int i, ret; 371 char *ptr1 = (char *) &current->thread.TS_FPR(reg+1);
372 int i, ret, sw = 0;
372 373
373 if (!(flags & F)) 374 if (!(flags & F))
374 return 0; 375 return 0;
375 if (reg & 1) 376 if (reg & 1)
376 return 0; /* invalid form: FRS/FRT must be even */ 377 return 0; /* invalid form: FRS/FRT must be even */
377 if (!(flags & SW)) { 378 if (flags & SW)
378 /* not byte-swapped - easy */ 379 sw = 7;
379 if (!(flags & ST)) 380 ret = 0;
380 ret = __copy_from_user(ptr, addr, 16); 381 for (i = 0; i < 8; ++i) {
381 else 382 if (!(flags & ST)) {
382 ret = __copy_to_user(addr, ptr, 16); 383 ret |= __get_user(ptr0[i^sw], addr + i);
383 } else { 384 ret |= __get_user(ptr1[i^sw], addr + i + 8);
384 /* each FPR value is byte-swapped separately */ 385 } else {
385 ret = 0; 386 ret |= __put_user(ptr0[i^sw], addr + i);
386 for (i = 0; i < 16; ++i) { 387 ret |= __put_user(ptr1[i^sw], addr + i + 8);
387 if (!(flags & ST))
388 ret |= __get_user(ptr[i^7], addr + i);
389 else
390 ret |= __put_user(ptr[i^7], addr + i);
391 } 388 }
392 } 389 }
393 if (ret) 390 if (ret)
@@ -646,11 +643,16 @@ static int emulate_vsx(unsigned char __user *addr, unsigned int reg,
646 unsigned int areg, struct pt_regs *regs, 643 unsigned int areg, struct pt_regs *regs,
647 unsigned int flags, unsigned int length) 644 unsigned int flags, unsigned int length)
648{ 645{
649 char *ptr = (char *) &current->thread.TS_FPR(reg); 646 char *ptr;
650 int ret = 0; 647 int ret = 0;
651 648
652 flush_vsx_to_thread(current); 649 flush_vsx_to_thread(current);
653 650
651 if (reg < 32)
652 ptr = (char *) &current->thread.TS_FPR(reg);
653 else
654 ptr = (char *) &current->thread.vr[reg - 32];
655
654 if (flags & ST) 656 if (flags & ST)
655 ret = __copy_to_user(addr, ptr, length); 657 ret = __copy_to_user(addr, ptr, length);
656 else { 658 else {