/* Assembler macros for 64 bit S/390.   Copyright (C) 2001, 2003 Free Software Foundation, Inc.   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <sysdeps/generic/sysdep.h>#ifdef	__ASSEMBLER__/* Syntactic details of assembler.  */#ifdef HAVE_ELF/* ELF uses byte-counts for .align, most others use log2 of count of bytes.  */#define ALIGNARG(log2) 1<<log2/* For ELF we need the `.type' directive to make shared libs work right.  */#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;/* In ELF C symbols are asm symbols.  */#undef	NO_UNDERSCORES#define NO_UNDERSCORES#else#define ALIGNARG(log2) log2#define ASM_TYPE_DIRECTIVE(name,type)	/* Nothing is specified.  */#define ASM_SIZE_DIRECTIVE(name)	/* Nothing is specified.  */#endif/* Define an entry point visible from C. */#define	ENTRY(name)							      \  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);				      \  ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)			      \  .align ALIGNARG(2);							      \  C_LABEL(name)								      \  cfi_startproc;							      \  CALL_MCOUNT#undef	END#define END(name)							      \  cfi_endproc;								      \  ASM_SIZE_DIRECTIVE(name)						      \/* If compiled for profiling, call `mcount' at the start of each function.  */#ifdef	PROF#ifdef PIC#define CALL_MCOUNT \  lgr 0,14 ; larl 1,0f ; brasl 14,_mcount@PLT ; lgr 14,0 ; \  .data ; .align 4 ; 0: .long 0 ; .text ;#else#define CALL_MCOUNT \  lgr 0,14 ; larl 1,0f ; brasl 14,_mcount ; lgr 14,0 ; \  .data ; .align 4 ; 0: .long 0 ; .text ;#endif#else#define CALL_MCOUNT		/* Do nothing.  */#endif#ifdef	NO_UNDERSCORES/* Since C identifiers are not normally prefixed with an underscore   on this system, the asm identifier `syscall_error' intrudes on the   C name space.  Make sure we use an innocuous name.  */#define	syscall_error	__syscall_error#define mcount		_mcount#endif#define	PSEUDO(name, syscall_name, args) \lose: SYSCALL_PIC_SETUP			\  jg JUMPTARGET(syscall_error);		\  .globl syscall_error;			\  ENTRY (name)				\  DO_CALL (syscall_name, args);		\  jm lose#undef	PSEUDO_END#define	PSEUDO_END(name)						      \  END (name)#undef JUMPTARGET#ifdef PIC#define JUMPTARGET(name)	name##@PLT#define SYSCALL_PIC_SETUP \    larl  %r12,_GLOBAL_OFFSET_TABLE_#else#define JUMPTARGET(name)	name#define SYSCALL_PIC_SETUP	/* Nothing.  */#endif/* Local label name for asm code. */#ifndef L#define L(name)		.L##name#endif#endif	/* __ASSEMBLER__ */