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/* $NetBSD: SYS.h,v 1.4 2015/01/12 02:48:20 dennis Exp $ */
#include <machine/asm.h>
#include <sys/syscall.h>
/*
* Inline what __cerror() is generally used to do since branching
* to __cerror() can't be done reliably with the powerpc64 ABI.
*/
#ifdef _REENTRANT
#define _DO_CERROR_SF_SZ (SF_SZ + SF_ALIGN(8))
#define _DO_CERROR() mflr %r0 ;\
streg %r31,-8(%r1) ;\
streg %r0,SF_LR(%r1) ;\
stptru %r1,-_DO_CERROR_SF_SZ(%r1) ;\
mr %r31,%r3 ;\
bl PIC_PLT(_C_LABEL(__errno)) ;\
nop ;\
stint %r31,0(%r3) ;\
addi %r1,%r1,_DO_CERROR_SF_SZ ;\
ldreg %r0,SF_LR(%r1) ;\
ldreg %r31,-8(%r1) ;\
mtlr %r0 ;\
li %r3,-1 ;\
li %r4,-1 ;\
blr
#else /* !_REENTRANT */
#define _DO_CERROR() lwz %r4,_C_LABEL(errno)@got(%r2) ;\
stw %r3,0(%r4) ;\
li %r3,-1 ;\
li %r4,-1 ;\
blr
#endif /* _REENTRANT */
/* Clearly BRANCH_TO_CERROR() no longer does that... */
#define BRANCH_TO_CERROR() _DO_CERROR()
#define _DOSYSCALL(x) li %r0,(SYS_ ## x) ;\
sc
#define _SYSCALL_NOERROR(x,y) .text ;\
.p2align 2 ;\
ENTRY(x) ;\
_DOSYSCALL(y)
#define _SYSCALL(x,y) .text ;\
.p2align 2 ;\
2: _DO_CERROR() ;\
_SYSCALL_NOERROR(x,y) ;\
bso 2b
#define SYSCALL_NOERROR(x) _SYSCALL_NOERROR(x,x)
#define SYSCALL(x) _SYSCALL(x,x)
#define PSEUDO_NOERROR(x,y) _SYSCALL_NOERROR(x,y) ;\
blr ;\
END(x)
#define PSEUDO(x,y) _SYSCALL_NOERROR(x,y) ;\
bnslr ;\
_DO_CERROR() ;\
END(x)
#define RSYSCALL_NOERROR(x) PSEUDO_NOERROR(x,x)
#define RSYSCALL(x) PSEUDO(x,x)
#define WSYSCALL(weak,strong) WEAK_ALIAS(weak,strong) ;\
PSEUDO(strong,weak)
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