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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [collect2-aix.h] - Blame information for rev 280

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1 280 jeremybenn
/* AIX cross support for collect2.
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   Copyright (C) 2009 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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/* 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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/* Compatiblity 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 auxillary 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 auxillary 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 auxillary 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 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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