/* Copyright (C) 2011-2018 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/>.  */

#define _SYSDEPS_SYSDEP_H 1

#include <bits/hwcap.h>

#ifdef	__ASSEMBLER__

#define SPARC_PIC_THUNK(reg)						\

	.ifndef __sparc_get_pc_thunk.reg;				\

	.section .text.__sparc_get_pc_thunk.reg,"axG",@progbits,__sparc_get_pc_thunk.reg,comdat; \

	.align	 32;							\

	.weak	 __sparc_get_pc_thunk.reg;				\

	.hidden	 __sparc_get_pc_thunk.reg;				\

	.type	 __sparc_get_pc_thunk.reg, #function;			\

__sparc_get_pc_thunk.reg:		   				\

	jmp	%o7 + 8;						\

	 add	%o7, %reg, %##reg;					\

	.previous;							\

	.endif;

/* The "-4" and "+4" offsets against _GLOBAL_OFFSET_TABLE_ are

   critical since they represent the offset from the thunk call to the

   instruction containing the _GLOBAL_OFFSET_TABLE_ reference.

   Therefore these instructions cannot be moved around without

   appropriate adjustments to those offsets.

   Furthermore, these expressions are special in another regard.  When

   the assembler sees a reference to _GLOBAL_OFFSET_TABLE_ inside of

   a %hi() or %lo(), it emits a PC-relative relocation.  This causes

   R_SPARC_HI22 to turn into R_SPARC_PC22, and R_SPARC_LO10 to turn into

   R_SPARC_PC10, respectively.

   Even when v9 we use a call sequence instead of using "rd %pc" because

   RDPC is extremely expensive and incurs a full pipeline flush.  */

#define SPARC_PIC_THUNK_CALL(reg)					\

	sethi	%hi(_GLOBAL_OFFSET_TABLE_-4), %##reg;			\

	call	__sparc_get_pc_thunk.reg;				\

	 or	%##reg, %lo(_GLOBAL_OFFSET_TABLE_+4), %##reg;

#define SETUP_PIC_REG(reg)						\

	SPARC_PIC_THUNK(reg)						\

	SPARC_PIC_THUNK_CALL(reg)

#define SETUP_PIC_REG_LEAF(reg, tmp)					\

	SPARC_PIC_THUNK(reg)						\

	mov	%o7, %##tmp;		      				\

	SPARC_PIC_THUNK_CALL(reg);					\

	mov	%##tmp, %o7;

#undef ENTRY

#define ENTRY(name)			\

	.align	4;			\

	.global	C_SYMBOL_NAME(name);	\

	.type	name, @function;	\

C_LABEL(name)				\

	cfi_startproc;

#undef END

#define END(name)			\

	cfi_endproc;			\

	.size name, . - name

#undef LOC

#define LOC(name)  .L##name

#endif	/* __ASSEMBLER__ */