160 lines
5.5 KiB
C
160 lines
5.5 KiB
C
/* $NetBSD: ld.h,v 1.2 1998/12/17 23:36:38 pk Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Definitions and functions prototypes shared between the
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* link-editor, ld(1), and the run-time linker, ld.so(1).
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*/
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#define SUN_COMPAT
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#include "md.h"
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#include "link.h"
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/* If compiled with GNU C, use the built-in alloca */
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#if defined(__GNUC__) || defined(sparc)
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#define alloca __builtin_alloca
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#endif
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/* Align to power-of-two boundary */
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#define PALIGN(x,p) (((x) + (u_long)(p) - 1) & (-(u_long)(p)))
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/* Align to machine dependent boundary */
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#define MALIGN(x) PALIGN(x,MAX_ALIGNMENT)
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#ifndef nounderscore
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#define ETEXT_SYM "_etext"
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#define EDATA_SYM "_edata"
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#define END_SYM "_end"
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#define DYN_SYM "__DYNAMIC"
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#define GOT_SYM "__GLOBAL_OFFSET_TABLE_"
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#define PLT_SYM "__PROCEDURE_LINKAGE_TABLE_"
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#define LPREFIX 'L'
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#else
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#define ETEXT_SYM "etext"
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#define EDATA_SYM "edata"
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#define END_SYM "end"
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#define DYN_SYM "_DYNAMIC"
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#define GOT_SYM "_GLOBAL_OFFSET_TABLE_"
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#define PLT_SYM "_PROCEDURE_LINKAGE_TABLE_"
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#define LPREFIX '.'
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#endif
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/*
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* Default macros; these may be overridden in <arch/---/md.h>.
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* Note: we only test the existence of RELOC_ADDRESS, so
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* you should override all or nothing at all.
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*
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* See ld.c for an addtional information on their use.
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*/
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#ifndef RELOC_ADDRESS
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#define RELOC_ADDRESS(r) ((r)->r_address)
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#define RELOC_EXTERN_P(r) ((r)->r_extern)
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#define RELOC_TYPE(r) ((r)->r_symbolnum)
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#define RELOC_SYMBOL(r) ((r)->r_symbolnum)
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#define RELOC_MEMORY_SUB_P(r) 0
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#define RELOC_MEMORY_ADD_P(r) 1
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#undef RELOC_ADD_EXTRA
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#define RELOC_PCREL_P(r) ((r)->r_pcrel)
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#define RELOC_VALUE_RIGHTSHIFT(r) 0
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#if defined(RTLD) && defined(SUN_COMPAT)
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#define RELOC_TARGET_SIZE(r) (2) /* !!!!! Sun BUG compatible */
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#else
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#define RELOC_TARGET_SIZE(r) ((r)->r_length)
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#endif
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#define RELOC_TARGET_BITPOS(r) 0
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#define RELOC_TARGET_BITSIZE(r) 32
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#define RELOC_JMPTAB_P(r) ((r)->r_jmptable)
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#define RELOC_BASEREL_P(r) ((r)->r_baserel)
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#define RELOC_RELATIVE_P(r) ((r)->r_relative)
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#define RELOC_COPY_P(r) ((r)->r_copy)
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#define RELOC_LAZY_P(r) ((r)->r_jmptable)
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#define CHECK_GOT_RELOC(r) ((r)->r_pcrel)
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#define RELOC_PIC_TYPE(r) ((r)->r_baserel? \
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PIC_TYPE_LARGE:PIC_TYPE_NONE)
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#endif /* RELOC_ADDRESS */
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/* A separately overridable macros */
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#ifndef RELOC_INIT_SEGMENT_RELOC
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#define RELOC_INIT_SEGMENT_RELOC(r)
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#endif
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#ifndef MAX_GOTOFF
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#define MAX_GOTOFF(x) (LONG_MAX)
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#endif
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#ifndef MIN_GOTOFF
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#define MIN_GOTOFF(x) (LONG_MIN)
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#endif
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#ifndef TEXT_START
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#define TEXT_START(x) N_TXTADDR(x)
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#endif
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#ifndef DATA_START
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#define DATA_START(x) N_DATADDR(x)
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#endif
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/* Macros dealing with the set element symbols defined in a.out.h */
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#define SET_ELEMENT_P(x) ((x) >= N_SETA && (x) <= (N_SETB|N_EXT))
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#define TYPE_OF_SET_ELEMENT(x) ((x) - N_SETA + N_ABS)
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#define N_ISWEAK(p) (N_BIND(p) & BIND_WEAK)
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/* Functions that must be provided by arch/md.c: */
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void md_init_header __P((struct exec *, int, int));
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long md_get_addend __P((struct relocation_info *, unsigned char *));
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void md_relocate __P((struct relocation_info *, long,
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unsigned char *, int));
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int md_make_reloc __P((struct relocation_info *,
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struct relocation_info *, int));
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void md_set_breakpoint __P((long, long *));
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void md_make_jmpslot __P((jmpslot_t *, long, long));
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void md_fix_jmpslot __P((jmpslot_t *, long, u_long, int));
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void md_make_jmpreloc __P((struct relocation_info *,
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struct relocation_info *, int));
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void md_make_gotreloc __P((struct relocation_info *,
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struct relocation_info *, int));
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void md_make_cpyreloc __P((struct relocation_info *,
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struct relocation_info *));
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int md_midcompat __P((struct exec *));
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