On Tue, Dec 13, 2016 at 08:55:53AM -0800, Andy Lutomirski wrote:
> I want to file a GCC bug, though. This code sucks.
Looks like it started doing that with gcc-5. gcc-4.9 output looks fine here:
.globl x86_64_start_kernel
.type x86_64_start_kernel, @function
x86_64_start_kernel:
.LFB2013:
.loc 1 134 0
.cfi_startproc
pushq %rbp #
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp #,
.cfi_def_cfa_register 6
pushq %rbx #
.cfi_offset 3, -24
.loc 1 134 0
movq %rdi, %rbx # real_mode_data, real_mode_data
.LBB157:
.LBB158:
.LBB159:
.LBB160:
.LBB161:
.loc 3 69 0
#APP
# 69 "./arch/x86/include/asm/special_insns.h" 1
mov %cr4,%rax # val
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
