http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59644
--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
linux % diff -u kernel/printk/printk.o /var/tmp/linux/kernel/printk/printk.o
--- kernel/printk/printk.o 2013-12-31 09:23:45.569490147 +0100
+++ /var/tmp/linux/kernel/printk/printk.o 2013-12-31 09:23:22.066697479
+0100
@@ -2517,19 +2517,16 @@
printk_emit:
pushq %rbp
movq %rsp, %rbp
- pushq %r10
- leaq -56(%rbp), %rax
- leaq 16(%rbp), %r10
subq $72, %rsp
+ leaq 16(%rbp), %r10
movq %r9, -16(%rbp)
+ leaq -56(%rbp), %rax
leaq -80(%rbp), %r9
- movq %r10, -72(%rbp)
movl $40, -80(%rbp)
+ movq %r10, -72(%rbp)
movq %rax, -64(%rbp)
call vprintk_emit
- addq $72, %rsp
- popq %r10
- popq %rbp
+ leave
ret
.size printk_emit, .-printk_emit
.LCOLDE44:
@@ -2680,28 +2677,25 @@
printk:
pushq %rbp
movq %rsp, %rbp
- pushq %r10
- leaq -56(%rbp), %rax
- leaq 16(%rbp), %r10
subq $72, %rsp
+ leaq 16(%rbp), %r10
movq %rsi, -48(%rbp)
movq %rdx, -40(%rbp)
movq %rcx, -32(%rbp)
movq %r8, -24(%rbp)
- xorl %ecx, %ecx
+ leaq -56(%rbp), %rax
movq %r9, -16(%rbp)
movq %rdi, %r8
leaq -80(%rbp), %r9
+ xorl %ecx, %ecx
xorl %edx, %edx
orl $-1, %esi
xorl %edi, %edi
- movq %r10, -72(%rbp)
movl $8, -80(%rbp)
+ movq %r10, -72(%rbp)
movq %rax, -64(%rbp)
call vprintk_emit
- addq $72, %rsp
- popq %r10
- popq %rbp
+ leave
ret
.size printk, .-printk
.LCOLDE47:
@@ -4052,7 +4046,6 @@
printk_sched:
pushq %rbp
movq %rsp, %rbp
- pushq %r10
pushq %rbx
leaq 16(%rbp), %r10
subq $80, %rsp
@@ -4105,7 +4098,6 @@
#NO_APP
addq $80, %rsp
popq %rbx
- popq %r10
popq %rbp
ret
.size printk_sched, .-printk_sched
@@ -4691,26 +4683,23 @@
dump_stack_set_arch_desc:
pushq %rbp
movq %rsp, %rbp
- pushq %r10
- leaq -56(%rbp), %rax
- leaq 16(%rbp), %r10
subq $72, %rsp
+ leaq 16(%rbp), %r10
movq %rsi, -48(%rbp)
movq %rdx, -40(%rbp)
movq %rcx, -32(%rbp)
+ leaq -56(%rbp), %rax
movq %rdi, %rdx
leaq -80(%rbp), %rcx
movl $128, %esi
movq $dump_stack_arch_desc_str, %rdi
- movq %r10, -72(%rbp)
movq %r8, -24(%rbp)
movq %r9, -16(%rbp)
movl $8, -80(%rbp)
+ movq %r10, -72(%rbp)
movq %rax, -64(%rbp)
call vsnprintf
- addq $72, %rsp
- popq %r10
- popq %rbp
+ leave
ret
.size dump_stack_set_arch_desc, .-dump_stack_set_arch_desc
.LCOLDE92:
