307 lines
8.4 KiB
C
307 lines
8.4 KiB
C
/* AIX cross support for collect2.
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Copyright (C) 2009-2020 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_COLLECT2_AIX_H
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#define GCC_COLLECT2_AIX_H
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/* collect2-aix.c requires mmap support. It should otherwise be
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fairly portable. */
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#if defined(CROSS_DIRECTORY_STRUCTURE) \
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&& defined(TARGET_AIX_VERSION) \
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&& HAVE_MMAP
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#define CROSS_AIX_SUPPORT 1
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/* -------------------------------------------------------------------------
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Definitions adapted from bfd. (Fairly heavily adapted in some cases.)
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------------------------------------------------------------------------- */
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/* Compatibility types for bfd. */
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typedef unsigned HOST_WIDE_INT bfd_vma;
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/* The size of an archive's fl_magic field. */
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#define FL_MAGIC_SIZE 8
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/* The expected contents of fl_magic for big archives. */
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#define FL_MAGIC_BIG_AR "<bigaf>\012"
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/* The size of each offset string in the header of a big archive. */
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#define AR_BIG_OFFSET_SIZE 20
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/* The format of the file header in a "big" XCOFF archive. */
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struct external_big_ar_filehdr
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{
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/* Magic string. */
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char fl_magic[FL_MAGIC_SIZE];
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/* Offset of the member table (decimal ASCII string). */
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char fl_memoff[AR_BIG_OFFSET_SIZE];
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/* Offset of the global symbol table for 32-bit objects (decimal ASCII
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string). */
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char fl_symoff[AR_BIG_OFFSET_SIZE];
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/* Offset of the global symbol table for 64-bit objects (decimal ASCII
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string). */
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char fl_symoff64[AR_BIG_OFFSET_SIZE];
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/* Offset of the first member in the archive (decimal ASCII string). */
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char fl_firstmemoff[AR_BIG_OFFSET_SIZE];
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/* Offset of the last member in the archive (decimal ASCII string). */
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char fl_lastmemoff[AR_BIG_OFFSET_SIZE];
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/* Offset of the first member on the free list (decimal ASCII
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string). */
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char fl_freeoff[AR_BIG_OFFSET_SIZE];
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};
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/* Each archive name is followed by this many bytes of magic string. */
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#define SXCOFFARFMAG 2
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/* The format of a member header in a "big" XCOFF archive. */
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struct external_big_ar_member
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{
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/* File size not including the header (decimal ASCII string). */
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char ar_size[AR_BIG_OFFSET_SIZE];
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/* File offset of next archive member (decimal ASCII string). */
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char ar_nextoff[AR_BIG_OFFSET_SIZE];
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/* File offset of previous archive member (decimal ASCII string). */
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char ar_prevoff[AR_BIG_OFFSET_SIZE];
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/* File mtime (decimal ASCII string). */
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char ar_date[12];
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/* File UID (decimal ASCII string). */
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char ar_uid[12];
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/* File GID (decimal ASCII string). */
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char ar_gid[12];
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/* File mode (octal ASCII string). */
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char ar_mode[12];
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/* Length of file name (decimal ASCII string). */
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char ar_namlen[4];
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/* This structure is followed by the file name. The length of the
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name is given in the namlen field. If the length of the name is
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odd, the name is followed by a null byte. The name and optional
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null byte are followed by XCOFFARFMAG, which is not included in
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namlen. The contents of the archive member follow; the number of
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bytes is given in the size field. */
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};
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/* The known values of f_magic in an XCOFF file header. */
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#define U802WRMAGIC 0730 /* Writeable text segments. */
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#define U802ROMAGIC 0735 /* Readonly sharable text segments. */
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#define U802TOCMAGIC 0737 /* Readonly text segments and TOC. */
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#define U803XTOCMAGIC 0757 /* Aix 4.3 64-bit XCOFF. */
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#define U64_TOCMAGIC 0767 /* AIX 5+ 64-bit XCOFF. */
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/* The number of bytes in an XCOFF file's f_magic field. */
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#define F_MAGIC_SIZE 2
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/* The format of a 32-bit XCOFF file header. */
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struct external_filehdr_32
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{
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/* The magic number. */
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char f_magic[F_MAGIC_SIZE];
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/* The number of sections. */
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char f_nscns[2];
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/* Time & date stamp. */
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char f_timdat[4];
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/* The offset of the symbol table from the start of the file. */
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char f_symptr[4];
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/* The number of entries in the symbol table. */
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char f_nsyms[4];
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/* The size of the auxiliary header. */
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char f_opthdr[2];
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/* Flags. */
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char f_flags[2];
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};
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/* The format of a 64-bit XCOFF file header. */
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struct external_filehdr_64
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{
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/* The magic number. */
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char f_magic[F_MAGIC_SIZE];
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/* The number of sections. */
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char f_nscns[2];
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/* Time & date stamp. */
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char f_timdat[4];
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/* The offset of the symbol table from the start of the file. */
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char f_symptr[8];
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/* The size of the auxiliary header. */
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char f_opthdr[2];
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/* Flags. */
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char f_flags[2];
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/* The number of entries in the symbol table. */
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char f_nsyms[4];
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};
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/* An internal representation of the XCOFF file header. */
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struct internal_filehdr
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{
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unsigned short f_magic;
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unsigned short f_nscns;
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long f_timdat;
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bfd_vma f_symptr;
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long f_nsyms;
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unsigned short f_opthdr;
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unsigned short f_flags;
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};
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/* Symbol classes have their names in the debug section if this flag
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is set. */
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#define DBXMASK 0x80
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/* The format of an XCOFF symbol-table entry. */
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struct external_syment
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{
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union {
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struct {
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union {
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/* The name of the symbol. There is an implicit null character
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after the end of the array. */
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char n_name[8];
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struct {
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/* If n_zeroes is zero, n_offset is the offset the name from
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the start of the string table. */
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char n_zeroes[4];
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char n_offset[4];
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} u;
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} u;
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/* The symbol's value. */
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char n_value[4];
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} xcoff32;
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struct {
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/* The symbol's value. */
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char n_value[8];
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/* The offset of the symbol from the start of the string table. */
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char n_offset[4];
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} xcoff64;
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} u;
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/* The number of the section to which this symbol belongs. */
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char n_scnum[2];
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/* The type of symbol. (It can be interpreted as an n_lang
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and an n_cpu byte, but we don't care about that here.) */
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char n_type[2];
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/* The class of symbol (a C_* value). */
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char n_sclass[1];
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/* The number of auxiliary symbols attached to this entry. */
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char n_numaux[1];
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};
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/* Definitions required by collect2. */
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#define C_EXT 2
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#define F_SHROBJ 0x2000
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#define F_LOADONLY 0x4000
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#define N_UNDEF ((short) 0)
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#define N_TMASK 060
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#define N_BTSHFT 4
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#define DT_NON 0
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#define DT_FCN 2
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/* -------------------------------------------------------------------------
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Local code.
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------------------------------------------------------------------------- */
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/* An internal representation of an XCOFF symbol-table entry,
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which is associated with the API-defined SYMENT type. */
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struct internal_syment
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{
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char n_name[9];
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unsigned int n_zeroes;
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bfd_vma n_offset;
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bfd_vma n_value;
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short n_scnum;
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unsigned short n_flags;
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unsigned short n_type;
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unsigned char n_sclass;
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unsigned char n_numaux;
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};
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typedef struct internal_syment SYMENT;
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/* The internal representation of the API-defined LDFILE type. */
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struct internal_ldfile
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{
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/* The file handle for the associated file, or -1 if it hasn't been
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opened yet. */
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int fd;
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/* The start of the current XCOFF object, if one has been mapped
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into memory. Null otherwise. */
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char *object;
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/* The offset of OBJECT from the start of the containing page. */
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size_t page_offset;
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/* The size of the file pointed to by OBJECT. Valid iff OFFSET
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is nonnull. */
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size_t object_size;
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/* The offset of the next member in an archive after OBJECT,
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or -1 if this isn't an archive. Valid iff OFFSET is nonnull. */
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off_t next_member;
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/* The parsed version of the XCOFF file header. */
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struct internal_filehdr filehdr;
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};
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typedef struct internal_ldfile LDFILE;
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/* The API allows the file header to be directly accessed via this macro. */
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#define HEADER(FILE) ((FILE)->filehdr)
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/* API-defined return codes. SUCCESS must be > 0 and FAILURE must be <= 0. */
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#define SUCCESS 1
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#define FAILURE 0
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/* API-defined functions. */
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extern LDFILE *ldopen (char *, LDFILE *);
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extern char *ldgetname (LDFILE *, SYMENT *);
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extern int ldtbread (LDFILE *, long, SYMENT *);
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extern int ldclose (LDFILE *);
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#endif
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#endif /* GCC_COLLECT2_AIX_H */
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