9ae74960a8
machine type of 68000. * aoutx.h (NAME(aout,machine_type)): Add new argument unknown. Set *unknown to true if machine type is really unknown, as opposed to M_UNKNOWN for the 68000. (NAME(aout,set_arch_mach)): Change NAME(aout,machine_type) call accordingly. * libaout.h (NAME(aout,machine_type)): Add new argument to prototype.
563 lines
18 KiB
C
563 lines
18 KiB
C
/* BFD back-end data structures for a.out (and similar) files.
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Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef LIBAOUT_H
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#define LIBAOUT_H
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/* We try to encapsulate the differences in the various a.out file
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variants in a few routines, and otherwise share large masses of code.
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This means we only have to fix bugs in one place, most of the time. */
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#include "bfdlink.h"
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/* Parameterize the a.out code based on whether it is being built
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for a 32-bit architecture or a 64-bit architecture. */
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#if ARCH_SIZE==64
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#define GET_WORD bfd_h_get_64
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#define GET_SWORD bfd_h_get_signed_64
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#define PUT_WORD bfd_h_put_64
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#ifndef NAME
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#define NAME(x,y) CAT3(x,_64_,y)
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#endif
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#define JNAME(x) CAT(x,_64)
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#define BYTES_IN_WORD 8
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#else /* ARCH_SIZE == 32 */
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#define GET_WORD bfd_h_get_32
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#define GET_SWORD bfd_h_get_signed_32
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#define PUT_WORD bfd_h_put_32
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#ifndef NAME
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#define NAME(x,y) CAT3(x,_32_,y)
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#endif
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#define JNAME(x) CAT(x,_32)
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#define BYTES_IN_WORD 4
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#endif /* ARCH_SIZE==32 */
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/* Declare at file level, since used in parameter lists, which have
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weird scope. */
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struct external_exec;
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struct external_nlist;
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struct reloc_ext_external;
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struct reloc_std_external;
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/* a.out backend linker hash table entries. */
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struct aout_link_hash_entry
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{
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struct bfd_link_hash_entry root;
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/* Whether this symbol has been written out. */
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boolean written;
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/* Symbol index in output file. */
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int indx;
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};
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/* a.out backend linker hash table. */
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struct aout_link_hash_table
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{
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struct bfd_link_hash_table root;
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};
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/* Look up an entry in an a.out link hash table. */
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#define aout_link_hash_lookup(table, string, create, copy, follow) \
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((struct aout_link_hash_entry *) \
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bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow)))
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/* Traverse an a.out link hash table. */
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#define aout_link_hash_traverse(table, func, info) \
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(bfd_link_hash_traverse \
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(&(table)->root, \
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(boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
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(info)))
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/* Get the a.out link hash table from the info structure. This is
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just a cast. */
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#define aout_hash_table(p) ((struct aout_link_hash_table *) ((p)->hash))
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/* Back-end information for various a.out targets. */
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struct aout_backend_data
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{
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/* Are ZMAGIC files mapped contiguously? If so, the text section may
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need more padding, if the segment size (granularity for memory access
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control) is larger than the page size. */
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unsigned char zmagic_mapped_contiguous;
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/* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the
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text section, which starts immediately after the file header.
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If not, the text section starts on the next page. */
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unsigned char text_includes_header;
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/* The value to pass to N_SET_FLAGS. */
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unsigned char exec_hdr_flags;
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/* If the text section VMA isn't specified, and we need an absolute
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address, use this as the default. If we're producing a relocatable
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file, zero is always used. */
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/* ?? Perhaps a callback would be a better choice? Will this do anything
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reasonable for a format that handles multiple CPUs with different
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load addresses for each? */
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bfd_vma default_text_vma;
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/* Callback for setting the page and segment sizes, if they can't be
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trivially determined from the architecture. */
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boolean (*set_sizes) PARAMS ((bfd *));
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/* zmagic files only. For go32, the length of the exec header contributes
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to the size of the text section in the file for alignment purposes but
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does *not* get counted in the length of the text section. */
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unsigned char exec_header_not_counted;
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/* Callback from the add symbols phase of the linker code to handle
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a dynamic object. */
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boolean (*add_dynamic_symbols) PARAMS ((bfd *, struct bfd_link_info *));
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/* Callback from the add symbols phase of the linker code to handle
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adding a single symbol to the global linker hash table. */
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boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
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const char *, flagword, asection *,
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bfd_vma, const char *, boolean,
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boolean,
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struct bfd_link_hash_entry **));
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/* Called to handle linking a dynamic object. */
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boolean (*link_dynamic_object) PARAMS ((struct bfd_link_info *, bfd *));
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/* Called for each global symbol being written out by the linker.
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This should write out the dynamic symbol information. */
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boolean (*write_dynamic_symbol) PARAMS ((bfd *, struct bfd_link_info *,
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struct aout_link_hash_entry *));
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/* This callback is called by the linker for each reloc against an
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external symbol. RELOC is a pointer to the unswapped reloc. If
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*SKIP is set to true, the reloc will be skipped. */
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boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *info,
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bfd *input_bfd,
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asection *input_section,
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struct aout_link_hash_entry *h,
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PTR reloc, boolean *skip));
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/* Called at the end of a link to finish up any dynamic linking
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information. */
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boolean (*finish_dynamic_link) PARAMS ((bfd *, struct bfd_link_info *));
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};
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#define aout_backend_info(abfd) \
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((CONST struct aout_backend_data *)((abfd)->xvec->backend_data))
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/* This is the layout in memory of a "struct exec" while we process it.
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All 'lengths' are given as a number of bytes.
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All 'alignments' are for relinkable files only; an alignment of
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'n' indicates the corresponding segment must begin at an
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address that is a multiple of (2**n). */
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struct internal_exec
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{
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long a_info; /* Magic number and flags, packed */
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bfd_vma a_text; /* length of text, in bytes */
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bfd_vma a_data; /* length of data, in bytes */
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bfd_vma a_bss; /* length of uninitialized data area in mem */
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bfd_vma a_syms; /* length of symbol table data in file */
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bfd_vma a_entry; /* start address */
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bfd_vma a_trsize; /* length of text's relocation info, in bytes */
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bfd_vma a_drsize; /* length of data's relocation info, in bytes */
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/* Added for i960 */
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bfd_vma a_tload; /* Text runtime load address */
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bfd_vma a_dload; /* Data runtime load address */
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unsigned char a_talign; /* Alignment of text segment */
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unsigned char a_dalign; /* Alignment of data segment */
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unsigned char a_balign; /* Alignment of bss segment */
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char a_relaxable; /* Enough info for linker relax */
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};
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/* Magic number is written
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< MSB >
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3130292827262524232221201918171615141312111009080706050403020100
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< FLAGS >< MACHINE TYPE >< MAGIC NUMBER >
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*/
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/* Magic number for NetBSD is
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<MSB >
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3130292827262524232221201918171615141312111009080706050403020100
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< FLAGS >< >< MAGIC NUMBER >
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*/
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enum machine_type {
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M_UNKNOWN = 0,
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M_68010 = 1,
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M_68020 = 2,
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M_SPARC = 3,
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/* skip a bunch so we don't run into any of suns numbers */
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M_386 = 100,
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M_29K = 101, /* AMD 29000 */
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M_386_DYNIX = 102, /* Sequent running dynix */
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M_386_NETBSD = 134, /* NetBSD/386 binary */
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M_MIPS1 = 151, /* MIPS R2000/R3000 binary */
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M_MIPS2 = 152, /* MIPS R4000/R6000 binary */
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M_HP200 = 200, /* HP 200 (68010) BSD binary */
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M_HP300 = (300 % 256), /* HP 300 (68020+68881) BSD binary */
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M_HPUX = (0x20c % 256)/* HP 200/300 HPUX binary */
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};
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#define N_DYNAMIC(exec) ((exec).a_info & 0x80000000)
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#ifndef N_MAGIC
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# define N_MAGIC(exec) ((exec).a_info & 0xffff)
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#endif
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#ifndef N_MACHTYPE
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# define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
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#endif
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#ifndef N_FLAGS
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# define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
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#endif
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#ifndef N_SET_INFO
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# define N_SET_INFO(exec, magic, type, flags) \
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((exec).a_info = ((magic) & 0xffff) \
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| (((int)(type) & 0xff) << 16) \
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| (((flags) & 0xff) << 24))
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#endif
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#ifndef N_SET_DYNAMIC
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# define N_SET_DYNAMIC(exec, dynamic) \
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((exec).a_info = (dynamic) ? ((exec).a_info | 0x80000000) : \
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((exec).a_info & 0x7fffffff))
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#endif
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#ifndef N_SET_MAGIC
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# define N_SET_MAGIC(exec, magic) \
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((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
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#endif
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#ifndef N_SET_MACHTYPE
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# define N_SET_MACHTYPE(exec, machtype) \
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((exec).a_info = \
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((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
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#endif
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#ifndef N_SET_FLAGS
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# define N_SET_FLAGS(exec, flags) \
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((exec).a_info = \
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((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
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#endif
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typedef struct aout_symbol {
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asymbol symbol;
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short desc;
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char other;
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unsigned char type;
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} aout_symbol_type;
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/* The `tdata' struct for all a.out-like object file formats.
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Various things depend on this struct being around any time an a.out
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file is being handled. An example is dbxread.c in GDB. */
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struct aoutdata {
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struct internal_exec *hdr; /* exec file header */
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aout_symbol_type *symbols; /* symtab for input bfd */
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/* For ease, we do this */
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asection *textsec;
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asection *datasec;
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asection *bsssec;
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/* We remember these offsets so that after check_file_format, we have
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no dependencies on the particular format of the exec_hdr. */
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file_ptr sym_filepos;
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file_ptr str_filepos;
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/* Size of a relocation entry in external form */
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unsigned reloc_entry_size;
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/* Size of a symbol table entry in external form */
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unsigned symbol_entry_size;
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/* Page size - needed for alignment of demand paged files. */
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unsigned long page_size;
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/* Segment size - needed for alignment of demand paged files. */
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unsigned long segment_size;
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unsigned exec_bytes_size;
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unsigned vma_adjusted : 1;
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/* used when a bfd supports several highly similar formats */
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enum {
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default_format = 0,
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gnu_encap_format } subformat;
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enum {
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undecided_magic = 0,
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z_magic,
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o_magic,
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n_magic } magic;
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/* The external symbol information. */
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struct external_nlist *external_syms;
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bfd_size_type external_sym_count;
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char *external_strings;
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bfd_size_type external_string_size;
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struct aout_link_hash_entry **sym_hashes;
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/* A pointer for shared library information. */
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PTR dynamic_info;
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};
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struct aout_data_struct {
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struct aoutdata a;
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struct internal_exec e;
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};
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#define adata(bfd) ((bfd)->tdata.aout_data->a)
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#define exec_hdr(bfd) (adata(bfd).hdr)
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#define obj_aout_symbols(bfd) (adata(bfd).symbols)
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#define obj_textsec(bfd) (adata(bfd).textsec)
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#define obj_datasec(bfd) (adata(bfd).datasec)
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#define obj_bsssec(bfd) (adata(bfd).bsssec)
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#define obj_sym_filepos(bfd) (adata(bfd).sym_filepos)
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#define obj_str_filepos(bfd) (adata(bfd).str_filepos)
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#define obj_reloc_entry_size(bfd) (adata(bfd).reloc_entry_size)
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#define obj_symbol_entry_size(bfd) (adata(bfd).symbol_entry_size)
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#define obj_aout_subformat(bfd) (adata(bfd).subformat)
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#define obj_aout_external_syms(bfd) (adata(bfd).external_syms)
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#define obj_aout_external_sym_count(bfd) (adata(bfd).external_sym_count)
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#define obj_aout_external_strings(bfd) (adata(bfd).external_strings)
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#define obj_aout_external_string_size(bfd) (adata(bfd).external_string_size)
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#define obj_aout_sym_hashes(bfd) (adata(bfd).sym_hashes)
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#define obj_aout_dynamic_info(bfd) (adata(bfd).dynamic_info)
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/* We take the address of the first element of an asymbol to ensure that the
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macro is only ever applied to an asymbol */
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#define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))
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/* Information we keep for each a.out section. This is currently only
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used by the a.out backend linker. */
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struct aout_section_data_struct
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{
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/* The unswapped relocation entries for this section. */
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PTR relocs;
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};
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#define aout_section_data(s) \
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((struct aout_section_data_struct *) (s)->used_by_bfd)
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/* Prototype declarations for functions defined in aoutx.h */
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boolean
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NAME(aout,squirt_out_relocs) PARAMS ((bfd *abfd, asection *section));
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boolean
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NAME(aout,make_sections) PARAMS ((bfd *));
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bfd_target *
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NAME(aout,some_aout_object_p) PARAMS ((bfd *abfd,
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struct internal_exec *execp,
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bfd_target * (*callback)(bfd *)));
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boolean
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NAME(aout,mkobject) PARAMS ((bfd *abfd));
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enum machine_type
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NAME(aout,machine_type) PARAMS ((enum bfd_architecture arch,
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unsigned long machine,
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boolean *unknown));
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boolean
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NAME(aout,set_arch_mach) PARAMS ((bfd *abfd, enum bfd_architecture arch,
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unsigned long machine));
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boolean
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NAME(aout,new_section_hook) PARAMS ((bfd *abfd, asection *newsect));
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boolean
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NAME(aout,set_section_contents) PARAMS ((bfd *abfd, sec_ptr section,
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PTR location, file_ptr offset, bfd_size_type count));
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asymbol *
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NAME(aout,make_empty_symbol) PARAMS ((bfd *abfd));
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boolean
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NAME(aout,translate_symbol_table) PARAMS ((bfd *, aout_symbol_type *,
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struct external_nlist *,
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bfd_size_type, char *,
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bfd_size_type,
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boolean dynamic));
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boolean
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NAME(aout,slurp_symbol_table) PARAMS ((bfd *abfd));
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boolean
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NAME(aout,write_syms) PARAMS ((bfd *abfd));
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void
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NAME(aout,reclaim_symbol_table) PARAMS ((bfd *abfd));
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long
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NAME(aout,get_symtab_upper_bound) PARAMS ((bfd *abfd));
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long
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NAME(aout,get_symtab) PARAMS ((bfd *abfd, asymbol **location));
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void
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NAME(aout,swap_ext_reloc_in) PARAMS ((bfd *, struct reloc_ext_external *,
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arelent *, asymbol **));
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void
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NAME(aout,swap_std_reloc_in) PARAMS ((bfd *, struct reloc_std_external *,
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arelent *, asymbol **));
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boolean
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NAME(aout,slurp_reloc_table) PARAMS ((bfd *abfd, sec_ptr asect,
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asymbol **symbols));
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long
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NAME(aout,canonicalize_reloc) PARAMS ((bfd *abfd, sec_ptr section,
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arelent **relptr, asymbol **symbols));
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long
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NAME(aout,get_reloc_upper_bound) PARAMS ((bfd *abfd, sec_ptr asect));
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void
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NAME(aout,reclaim_reloc) PARAMS ((bfd *ignore_abfd, sec_ptr ignore));
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alent *
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NAME(aout,get_lineno) PARAMS ((bfd *ignore_abfd, asymbol *ignore_symbol));
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void
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NAME(aout,print_symbol) PARAMS ((bfd *ignore_abfd, PTR file,
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asymbol *symbol, bfd_print_symbol_type how));
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void
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NAME(aout,get_symbol_info) PARAMS ((bfd *ignore_abfd,
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asymbol *symbol, symbol_info *ret));
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boolean
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NAME(aout,find_nearest_line) PARAMS ((bfd *abfd, asection *section,
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asymbol **symbols, bfd_vma offset, CONST char **filename_ptr,
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CONST char **functionname_ptr, unsigned int *line_ptr));
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int
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NAME(aout,sizeof_headers) PARAMS ((bfd *abfd, boolean exec));
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boolean
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NAME(aout,adjust_sizes_and_vmas) PARAMS ((bfd *abfd,
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bfd_size_type *text_size, file_ptr *text_end));
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void
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NAME(aout,swap_exec_header_in) PARAMS ((bfd *abfd,
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struct external_exec *raw_bytes, struct internal_exec *execp));
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void
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||
NAME(aout,swap_exec_header_out) PARAMS ((bfd *abfd,
|
||
struct internal_exec *execp, struct external_exec *raw_bytes));
|
||
|
||
struct bfd_hash_entry *
|
||
NAME(aout,link_hash_newfunc)
|
||
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
||
|
||
boolean
|
||
NAME(aout,link_hash_table_init)
|
||
PARAMS ((struct aout_link_hash_table *, bfd *,
|
||
struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
|
||
struct bfd_hash_table *,
|
||
const char *)));
|
||
|
||
struct bfd_link_hash_table *
|
||
NAME(aout,link_hash_table_create) PARAMS ((bfd *));
|
||
|
||
boolean
|
||
NAME(aout,link_add_symbols) PARAMS ((bfd *, struct bfd_link_info *));
|
||
|
||
boolean
|
||
NAME(aout,final_link) PARAMS ((bfd *, struct bfd_link_info *,
|
||
void (*) (bfd *, file_ptr *, file_ptr *,
|
||
file_ptr *)));
|
||
|
||
boolean
|
||
NAME(aout,bfd_free_cached_info) PARAMS ((bfd *));
|
||
|
||
/* Prototypes for functions in stab-syms.c. */
|
||
|
||
CONST char *
|
||
aout_stab_name PARAMS ((int code));
|
||
|
||
/* A.out uses the generic versions of these routines... */
|
||
|
||
#define aout_32_get_section_contents _bfd_generic_get_section_contents
|
||
|
||
#define aout_64_get_section_contents _bfd_generic_get_section_contents
|
||
#ifndef NO_WRITE_HEADER_KLUDGE
|
||
#define NO_WRITE_HEADER_KLUDGE 0
|
||
#endif
|
||
|
||
#ifndef aout_32_bfd_is_local_label
|
||
#define aout_32_bfd_is_local_label bfd_generic_is_local_label
|
||
#endif
|
||
|
||
#ifndef WRITE_HEADERS
|
||
#define WRITE_HEADERS(abfd, execp) \
|
||
{ \
|
||
bfd_size_type text_size; /* dummy vars */ \
|
||
file_ptr text_end; \
|
||
if (adata(abfd).magic == undecided_magic) \
|
||
NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end); \
|
||
\
|
||
execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \
|
||
execp->a_entry = bfd_get_start_address (abfd); \
|
||
\
|
||
execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \
|
||
obj_reloc_entry_size (abfd)); \
|
||
execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \
|
||
obj_reloc_entry_size (abfd)); \
|
||
NAME(aout,swap_exec_header_out) (abfd, execp, &exec_bytes); \
|
||
\
|
||
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) return false; \
|
||
if (bfd_write ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd) \
|
||
!= EXEC_BYTES_SIZE) \
|
||
return false; \
|
||
/* Now write out reloc info, followed by syms and strings */ \
|
||
\
|
||
if (bfd_get_outsymbols (abfd) != (asymbol **) NULL \
|
||
&& bfd_get_symcount (abfd) != 0) \
|
||
{ \
|
||
if (bfd_seek (abfd, (file_ptr)(N_SYMOFF(*execp)), SEEK_SET) \
|
||
!= 0) \
|
||
return false; \
|
||
\
|
||
if (! NAME(aout,write_syms)(abfd)) return false; \
|
||
\
|
||
if (bfd_seek (abfd, (file_ptr)(N_TRELOFF(*execp)), SEEK_SET) \
|
||
!= 0) \
|
||
return false; \
|
||
\
|
||
if (!NAME(aout,squirt_out_relocs) (abfd, obj_textsec (abfd))) \
|
||
return false; \
|
||
if (bfd_seek (abfd, (file_ptr)(N_DRELOFF(*execp)), SEEK_SET) \
|
||
!= 0) \
|
||
return false; \
|
||
\
|
||
if (!NAME(aout,squirt_out_relocs)(abfd, obj_datasec (abfd))) \
|
||
return false; \
|
||
} \
|
||
}
|
||
#endif
|
||
|
||
#endif /* ! defined (LIBAOUT_H) */
|