glibc/sysdeps/sh/sysdep.h

/* Assembler macros for SH.
   Copyright (C) 1999, 2000, 2005, 2012 Free Software Foundation, Inc.
   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, see
   <http://www.gnu.org/licenses/>.  */

#include <sysdeps/generic/sysdep.h>

#ifdef	__ASSEMBLER__

/* Syntactic details of assembler.  */

#define ALIGNARG(log2) 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

#ifdef SHARED
#define PLTJMP(_x)	_x##@PLT
#else
#define PLTJMP(_x)	_x
#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(5);							      \
  C_LABEL(name)								      \
  cfi_startproc;							      \
  CALL_MCOUNT

#undef	END
#define END(name)							      \
  cfi_endproc;								      \
  ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(name))

/* If compiled for profiling, call `mcount' at the start of each function.  */
#ifdef	PROF
#define CALL_MCOUNT					\
	mov.l	1f,r1;					\
	sts.l	pr,@-r15;				\
	cfi_adjust_cfa_offset (4);			\
	cfi_rel_offset (pr, 0);				\
	mova	2f,r0;					\
	jmp	@r1;					\
	 lds	r0,pr;					\
	.align	2;					\
1:	.long	mcount;					\
2:	lds.l	@r15+,pr;				\
	cfi_adjust_cfa_offset (-4);			\
	cfi_restore (pr)

#else
#define CALL_MCOUNT		/* Do nothing.  */
#endif

/* 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	/* __ASSEMBLER__ */