minix/lib/libc/arch/powerpc64/sys/cerror.S

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/* $NetBSD: cerror.S,v 1.5 2013/09/12 15:36:15 joerg Exp $ */
#include <machine/asm.h>
#include "SYS.h"
#ifndef _REENTRANT
.globl _C_LABEL(errno)
#endif
#ifdef __PIC__
.protected _C_LABEL(__cerror)
#endif
ENTRY(__cerror)
#ifdef _REENTRANT
mflr %r0
stwu %r1,-16(%r1) # allocate new stack frame
stw %r0,20(%r1)
stw %r31,8(%r1)
mr %r31,%r3 # stash away in callee-saved register
bl PIC_PLT(_C_LABEL(__errno))
stw %r31,0(%r3)
lwz %r0,20(%r1)
lwz %r31,8(%r1)
mtlr %r0
la %r1,16(%r1)
#else
#ifdef __PIC__
mflr %r10
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr %r4
lwz %r4,_C_LABEL(errno)@got(%r4)
stw %r3,0(%r4)
mtlr %r10
#else
lis %r4,_C_LABEL(errno)@ha
stw %r3,_C_LABEL(errno)@l(%r4)
#endif /* __PIC__ */
#endif /* _REENTRANT */
li %r3,-1
li %r4,-1
blr