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ia16-preamble.h
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ia16-preamble.h
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/* Common preamble for IA-16 assembly modules in libgcc
Copyright (C) 2019 Free Software Foundation, Inc.
Written By TK Chia
This file is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.
This file 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
General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
.arch i8086,jumps
.code16
.att_syntax prefix
#ifdef __IA16_CMODEL_IS_FAR_TEXT
/*
* Under a far-text memory model (e.g. medium model), place all our
* assembly language libgcc routines in the same far text segment.
* This allows the libgcc API routines to invoke internal routines
* using near calls.
*/
.section .fartext.f.libgcc2.a.LIB2ADD$, "ax", @progbits
/*
* FT_ (INSN) conditionally assembles an instruction INSN iff we are
* building for a far-text memory model. NT_ (INSN) does the opposite.
*
* SR_ (PLACE, SYM) installs an IA-16 segment relocation for SYM's
* segment, at the place PLACE.
*/
# define FT_(insn...) insn
# define NT_(insn...)
#else
.text
# define FT_(insn...)
# define NT_(insn...) insn
#endif
#ifdef __IA16_ABI_SEGELF
# define SR__(aux) #aux @SEG
# define SR_(sym) SR__(sym##!)
#else
# define SR_(sym) sym @OZSEG16
#endif