| /drivers/include/asm/asm.h |
|---|
| 63,6 → 63,31 |
| _ASM_ALIGN ; \ |
| _ASM_PTR (entry); \ |
| .popsection |
| .macro ALIGN_DESTINATION |
| /* check for bad alignment of destination */ |
| movl %edi,%ecx |
| andl $7,%ecx |
| jz 102f /* already aligned */ |
| subl $8,%ecx |
| negl %ecx |
| subl %ecx,%edx |
| 100: movb (%rsi),%al |
| 101: movb %al,(%rdi) |
| incq %rsi |
| incq %rdi |
| decl %ecx |
| jnz 100b |
| 102: |
| .section .fixup,"ax" |
| 103: addl %ecx,%edx /* ecx is zerorest also */ |
| jmp copy_user_handle_tail |
| .previous |
| _ASM_EXTABLE(100b,103b) |
| _ASM_EXTABLE(101b,103b) |
| .endm |
| #else |
| # define _ASM_EXTABLE(from,to) \ |
| " .pushsection \"__ex_table\",\"a\"\n" \ |