diff options
| -rw-r--r-- | sys/amd64/amd64/support.S | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/sys/amd64/amd64/support.S b/sys/amd64/amd64/support.S index 633f7b1..7fcb4b9 100644 --- a/sys/amd64/amd64/support.S +++ b/sys/amd64/amd64/support.S @@ -76,15 +76,15 @@ ENTRY(bzero) /* Address: %rdi */ ENTRY(pagezero) - lea 4096(%rdi),%rsi + movq $-PAGE_SIZE,%rdx + subq %rdx,%rdi xorq %rax,%rax 1: - movnti %rax,(%rdi) - movnti %rax,8(%rdi) - movnti %rax,16(%rdi) - movnti %rax,24(%rdi) - addq $32,%rdi - cmpq %rsi,%rdi + movnti %rax,(%rdi,%rdx) + movnti %rax,8(%rdi,%rdx) + movnti %rax,16(%rdi,%rdx) + movnti %rax,24(%rdi,%rdx) + addq $32,%rdx jne 1b sfence retq |
