/* Assembler macros for x86-64.

   Copyright (C) 2001-2018 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/>.  */

#ifndef _X86_64_SYSDEP_H

#define _X86_64_SYSDEP_H 1

#include <sysdeps/x86/sysdep.h>

#ifdef	__ASSEMBLER__

/* Syntactic details of assembler.  */

/* This macro is for setting proper CFI with DW_CFA_expression describing

   the register as saved relative to %rsp instead of relative to the CFA.

   Expression is DW_OP_drop, DW_OP_breg7 (%rsp is register 7), sleb128 offset

   from %rsp.  */

#define cfi_offset_rel_rsp(regn, off)	.cfi_escape 0x10, regn, 0x4, 0x13, \

					0x77, off & 0x7F | 0x80, off >> 7

/* If compiled for profiling, call `mcount' at the start of each function.  */

#ifdef	PROF

/* The mcount code relies on a normal frame pointer being on the stack

   to locate our caller, so push one just for its benefit.  */

#define CALL_MCOUNT                                                          \

  pushq %rbp;                                                                \

  cfi_adjust_cfa_offset(8);                                                  \

  movq %rsp, %rbp;                                                           \

  cfi_def_cfa_register(%rbp);                                                \

  call JUMPTARGET(mcount);                                                   \

  popq %rbp;                                                                 \

  cfi_def_cfa(rsp,8);

#else

#define CALL_MCOUNT		/* Do nothing.  */

#endif

#define	PSEUDO(name, syscall_name, args)				      \

lose:									      \

  jmp JUMPTARGET(syscall_error)						      \

  .globl syscall_error;							      \

  ENTRY (name)								      \

  DO_CALL (syscall_name, args);						      \

  jb lose

#undef JUMPTARGET

#ifdef SHARED

# ifdef BIND_NOW

#  define JUMPTARGET(name)	*name##@GOTPCREL(%rip)

# else

#  define JUMPTARGET(name)	name##@PLT

# endif

#else

/* For static archives, branch to target directly.  */

# define JUMPTARGET(name)	name

#endif

/* Long and pointer size in bytes.  */

#define LP_SIZE	8

/* Instruction to operate on long and pointer.  */

#define LP_OP(insn) insn##q

/* Assembler address directive. */

#define ASM_ADDR .quad

/* Registers to hold long and pointer.  */

#define RAX_LP	rax

#define RBP_LP	rbp

#define RBX_LP	rbx

#define RCX_LP	rcx

#define RDI_LP	rdi

#define RDX_LP	rdx

#define RSI_LP	rsi

#define RSP_LP	rsp

#define R8_LP	r8

#define R9_LP	r9

#define R10_LP	r10

#define R11_LP	r11

#define R12_LP	r12

#define R13_LP	r13

#define R14_LP	r14

#define R15_LP	r15

#else	/* __ASSEMBLER__ */

/* Long and pointer size in bytes.  */

#define LP_SIZE "8"

/* Instruction to operate on long and pointer.  */

#define LP_OP(insn) #insn "q"

/* Assembler address directive. */

#define ASM_ADDR ".quad"

/* Registers to hold long and pointer.  */

#define RAX_LP	"rax"

#define RBP_LP	"rbp"

#define RBX_LP	"rbx"

#define RCX_LP	"rcx"

#define RDI_LP	"rdi"

#define RDX_LP	"rdx"

#define RSI_LP	"rsi"

#define RSP_LP	"rsp"

#define R8_LP	"r8"

#define R9_LP	"r9"

#define R10_LP	"r10"

#define R11_LP	"r11"

#define R12_LP	"r12"

#define R13_LP	"r13"

#define R14_LP	"r14"

#define R15_LP	"r15"

#endif	/* __ASSEMBLER__ */

#endif	/* _X86_64_SYSDEP_H */