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

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/* $NetBSD: cerror.S,v 1.8 2011/01/16 02:43:10 matt Exp $ */
#include "SYS.h"
#include "assym.h"
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: cerror.S,v 1.8 2011/01/16 02:43:10 matt Exp $")
#endif /* LIBC_SCCS && !lint */
#ifndef _REENTRANT
.globl _C_LABEL(errno)
#endif
#ifdef PIC
.hidden _C_LABEL(__cerror)
#endif
ENTRY(__cerror)
#ifdef _REENTRANT
mflr %r0
stwu %r1,-CALLFRAMELEN(%r1) # allocate new stack frame
stw %r0,CALLFRAMELEN+CALLFRAME_LR(%r1)
#ifdef PIC
stw %r30,CALLFRAME_R30(%r1)
PIC_TOCSETUP(__cerror, %r30)
#endif
stw %r31,CALLFRAME_R31(%r1)
mr %r31,%r3 # stash away in callee-saved register
bl PIC_PLT(_C_LABEL(__errno))
stw %r31,0(%r3)
lwz %r0,CALLFRAMELEN+CALLFRAME_LR(%r1)
lwz %r31,CALLFRAME_R31(%r1)
#ifdef PIC
lwz %r30,CALLFRAME_R30(%r1)
#endif
mtlr %r0
addi %r1,%r1,CALLFRAMELEN
#else
#ifdef PIC
mflr %r10
PIC_GOTSETUP(%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
END(__cerror)