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C/C++ Source or Header  |  1995-01-18  |  31.4 KB  |  803 lines
  1. /* BFD back-end for IBM RS/6000 "XCOFF" files.
  2.    Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
  3.    FIXME: Can someone provide a transliteration of this name into ASCII?
  4.    Using the following chars caused a compiler warning on HIUX (so I replaced
  5.    them with octal escapes), and isn't useful without an understanding of what
  6.    character set it is.
  7.    Written by Metin G. Ozisik, Mimi Ph\373\364ng-Th\345o V\365, 
  8.      and John Gilmore.
  9.    Archive support from Damon A. Permezel.
  10.    Contributed by IBM Corporation and Cygnus Support.
  11.  
  12. This file is part of BFD, the Binary File Descriptor library.
  13.  
  14. This program is free software; you can redistribute it and/or modify
  15. it under the terms of the GNU General Public License as published by
  16. the Free Software Foundation; either version 2 of the License, or
  17. (at your option) any later version.
  18.  
  19. This program is distributed in the hope that it will be useful,
  20. but WITHOUT ANY WARRANTY; without even the implied warranty of
  21. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22. GNU General Public License for more details.
  23.  
  24. You should have received a copy of the GNU General Public License
  25. along with this program; if not, write to the Free Software
  26. Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  27.  
  28. /* This port currently only handles reading object files, except when
  29.    compiled on an RS/6000 host.  -- no archive support, no core files.
  30.    In all cases, it does not support writing.
  31.  
  32.    FIXMEmgo comments are left from Metin Ozisik's original port.  */
  33.  
  34. /* Internalcoff.h and coffcode.h modify themselves based on this flag.  */
  35. #define RS6000COFF_C 1
  36.  
  37. #include "bfd.h"
  38. #include "sysdep.h"
  39. #include "libbfd.h"
  40. #include "obstack.h"
  41. #include "coff/internal.h"
  42. #include "coff/rs6000.h"
  43. #include "libcoff.h"
  44.  
  45. /* The main body of code is in coffcode.h.  */
  46.  
  47. #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
  48.  
  49. /* The XCOFF reloc table.  Actually, XCOFF relocations specify the
  50.    bitsize and whether they are signed or not, along with a
  51.    conventional type.  This table is for the types, which are used for
  52.    different algorithms for putting in the reloc.  Many of these
  53.    relocs need special_function entries, which I have not written.  */
  54.  
  55. static reloc_howto_type rs6000coff_howto_table[] =
  56. {
  57.   /* Standard 32 bit relocation.  */
  58.   HOWTO (0,                    /* type */                                 
  59.      0,                    /* rightshift */                           
  60.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  61.      32,                    /* bitsize */                   
  62.      false,                    /* pc_relative */                          
  63.      0,                    /* bitpos */                               
  64.      complain_overflow_bitfield, /* complain_on_overflow */
  65.      0,                /* special_function */                     
  66.      "R_POS",               /* name */                                 
  67.      true,                    /* partial_inplace */                      
  68.      0xffffffff,            /* src_mask */                             
  69.      0xffffffff,            /* dst_mask */                             
  70.      false),                /* pcrel_offset */
  71.  
  72.   /* 32 bit relocation, but store negative value.  */
  73.   HOWTO (1,                    /* type */                                 
  74.      0,                    /* rightshift */                           
  75.      -2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  76.      32,                    /* bitsize */                   
  77.      false,                    /* pc_relative */                          
  78.      0,                    /* bitpos */                               
  79.      complain_overflow_bitfield, /* complain_on_overflow */
  80.      0,                /* special_function */                     
  81.      "R_NEG",               /* name */                                 
  82.      true,                    /* partial_inplace */                      
  83.      0xffffffff,            /* src_mask */                             
  84.      0xffffffff,            /* dst_mask */                             
  85.      false),                /* pcrel_offset */
  86.  
  87.   /* 32 bit PC relative relocation.  */
  88.   HOWTO (2,                    /* type */                                 
  89.      0,                    /* rightshift */                           
  90.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  91.      32,                    /* bitsize */                   
  92.      true,                    /* pc_relative */                          
  93.      0,                    /* bitpos */                               
  94.      complain_overflow_signed, /* complain_on_overflow */
  95.      0,                /* special_function */                     
  96.      "R_REL",               /* name */                                 
  97.      true,                    /* partial_inplace */                      
  98.      0xffffffff,            /* src_mask */                             
  99.      0xffffffff,            /* dst_mask */                             
  100.      false),                /* pcrel_offset */
  101.   
  102.   /* 16 bit TOC relative relocation.  */
  103.   HOWTO (3,                    /* type */                                 
  104.      0,                    /* rightshift */                           
  105.      1,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  106.      16,                    /* bitsize */                   
  107.      false,                    /* pc_relative */                          
  108.      0,                    /* bitpos */                               
  109.      complain_overflow_signed, /* complain_on_overflow */
  110.      0,                /* special_function */                     
  111.      "R_TOC",               /* name */                                 
  112.      true,                    /* partial_inplace */                      
  113.      0xffff,            /* src_mask */                             
  114.      0xffff,            /* dst_mask */                             
  115.      false),                /* pcrel_offset */
  116.   
  117.   /* I don't really know what this is.  */
  118.   HOWTO (4,                    /* type */                                 
  119.      1,                    /* rightshift */                           
  120.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  121.      32,                    /* bitsize */                   
  122.      false,                    /* pc_relative */                          
  123.      0,                    /* bitpos */                               
  124.      complain_overflow_bitfield, /* complain_on_overflow */
  125.      0,                /* special_function */                     
  126.      "R_RTB",               /* name */                                 
  127.      true,                    /* partial_inplace */                      
  128.      0xffffffff,            /* src_mask */                             
  129.      0xffffffff,            /* dst_mask */                             
  130.      false),                /* pcrel_offset */
  131.   
  132.   /* External TOC relative symbol.  */
  133.   HOWTO (5,                    /* type */                                 
  134.      0,                    /* rightshift */                           
  135.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  136.      16,                    /* bitsize */                   
  137.      false,                    /* pc_relative */                          
  138.      0,                    /* bitpos */                               
  139.      complain_overflow_bitfield, /* complain_on_overflow */
  140.      0,                /* special_function */                     
  141.      "R_GL",                /* name */                                 
  142.      true,                    /* partial_inplace */                      
  143.      0xffff,            /* src_mask */                             
  144.      0xffff,            /* dst_mask */                             
  145.      false),                /* pcrel_offset */
  146.   
  147.   /* Local TOC relative symbol.  */
  148.   HOWTO (6,                    /* type */                                 
  149.      0,                    /* rightshift */                           
  150.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  151.      16,                    /* bitsize */                   
  152.      false,                    /* pc_relative */                          
  153.      0,                    /* bitpos */                               
  154.      complain_overflow_bitfield, /* complain_on_overflow */
  155.      0,                /* special_function */                     
  156.      "R_TCL",               /* name */                                 
  157.      true,                    /* partial_inplace */                      
  158.      0xffff,            /* src_mask */                             
  159.      0xffff,            /* dst_mask */                             
  160.      false),                /* pcrel_offset */
  161.   
  162.   { 7 },
  163.   
  164.   /* Non modifiable absolute branch.  */
  165.   HOWTO (8,                    /* type */                                 
  166.      0,                    /* rightshift */                           
  167.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  168.      26,                    /* bitsize */                   
  169.      false,                    /* pc_relative */                          
  170.      0,                    /* bitpos */                               
  171.      complain_overflow_bitfield, /* complain_on_overflow */
  172.      0,                /* special_function */                     
  173.      "R_BA",                /* name */                                 
  174.      true,                    /* partial_inplace */                      
  175.      0x3fffffc,            /* src_mask */                             
  176.      0x3fffffc,            /* dst_mask */                             
  177.      false),                /* pcrel_offset */
  178.   
  179.   { 9 },
  180.  
  181.   /* Non modifiable relative branch.  */
  182.   HOWTO (0xa,                    /* type */                                 
  183.      0,                    /* rightshift */                           
  184.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  185.      26,                    /* bitsize */                   
  186.      true,                    /* pc_relative */                          
  187.      0,                    /* bitpos */                               
  188.      complain_overflow_signed, /* complain_on_overflow */
  189.      0,                /* special_function */                     
  190.      "R_BR",                /* name */                                 
  191.      true,                    /* partial_inplace */                      
  192.      0x3fffffc,            /* src_mask */                             
  193.      0x3fffffc,            /* dst_mask */                             
  194.      false),                /* pcrel_offset */
  195.   
  196.   { 0xb },
  197.  
  198.   /* Indirect load.  */
  199.   HOWTO (0xc,                    /* type */                                 
  200.      0,                    /* rightshift */                           
  201.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  202.      16,                    /* bitsize */                   
  203.      false,                    /* pc_relative */                          
  204.      0,                    /* bitpos */                               
  205.      complain_overflow_bitfield, /* complain_on_overflow */
  206.      0,                /* special_function */                     
  207.      "R_RL",                /* name */                                 
  208.      true,                    /* partial_inplace */                      
  209.      0xffff,            /* src_mask */                             
  210.      0xffff,            /* dst_mask */                             
  211.      false),                /* pcrel_offset */
  212.   
  213.   /* Load address.  */
  214.   HOWTO (0xd,                    /* type */                                 
  215.      0,                    /* rightshift */                           
  216.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  217.      16,                    /* bitsize */                   
  218.      false,                    /* pc_relative */                          
  219.      0,                    /* bitpos */                               
  220.      complain_overflow_bitfield, /* complain_on_overflow */
  221.      0,                /* special_function */                     
  222.      "R_RLA",               /* name */                                 
  223.      true,                    /* partial_inplace */                      
  224.      0xffff,            /* src_mask */                             
  225.      0xffff,            /* dst_mask */                             
  226.      false),                /* pcrel_offset */
  227.   
  228.   { 0xe },
  229.   
  230.   /* Non-relocating reference.  */
  231.   HOWTO (0xf,                    /* type */                                 
  232.      0,                    /* rightshift */                           
  233.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  234.      32,                    /* bitsize */                   
  235.      false,                    /* pc_relative */                          
  236.      0,                    /* bitpos */                               
  237.      complain_overflow_bitfield, /* complain_on_overflow */
  238.      0,                /* special_function */                     
  239.      "R_REF",               /* name */                                 
  240.      false,                    /* partial_inplace */                      
  241.      0,                /* src_mask */                             
  242.      0,                /* dst_mask */                             
  243.      false),                /* pcrel_offset */
  244.   
  245.   { 0x10 },
  246.   { 0x11 },
  247.   
  248.   /* TOC relative indirect load.  */
  249.   HOWTO (0x12,                    /* type */                                 
  250.      0,                    /* rightshift */                           
  251.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  252.      16,                    /* bitsize */                   
  253.      false,                    /* pc_relative */                          
  254.      0,                    /* bitpos */                               
  255.      complain_overflow_bitfield, /* complain_on_overflow */
  256.      0,                /* special_function */                     
  257.      "R_TRL",               /* name */                                 
  258.      true,                    /* partial_inplace */                      
  259.      0xffff,            /* src_mask */                             
  260.      0xffff,            /* dst_mask */                             
  261.      false),                /* pcrel_offset */
  262.   
  263.   /* TOC relative load address.  */
  264.   HOWTO (0x13,                    /* type */                                 
  265.      0,                    /* rightshift */                           
  266.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  267.      16,                    /* bitsize */                   
  268.      false,                    /* pc_relative */                          
  269.      0,                    /* bitpos */                               
  270.      complain_overflow_bitfield, /* complain_on_overflow */
  271.      0,                /* special_function */                     
  272.      "R_TRLA",              /* name */                                 
  273.      true,                    /* partial_inplace */                      
  274.      0xffff,            /* src_mask */                             
  275.      0xffff,            /* dst_mask */                             
  276.      false),                /* pcrel_offset */
  277.   
  278.   /* Modifiable relative branch.  */
  279.   HOWTO (0x14,                    /* type */                                 
  280.      1,                    /* rightshift */                           
  281.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  282.      32,                    /* bitsize */                   
  283.      false,                    /* pc_relative */                          
  284.      0,                    /* bitpos */                               
  285.      complain_overflow_bitfield, /* complain_on_overflow */
  286.      0,                /* special_function */                     
  287.      "R_RRTBI",             /* name */                                 
  288.      true,                    /* partial_inplace */                      
  289.      0xffffffff,            /* src_mask */                             
  290.      0xffffffff,            /* dst_mask */                             
  291.      false),                /* pcrel_offset */
  292.   
  293.   /* Modifiable absolute branch.  */
  294.   HOWTO (0x15,                    /* type */                                 
  295.      1,                    /* rightshift */                           
  296.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  297.      32,                    /* bitsize */                   
  298.      false,                    /* pc_relative */                          
  299.      0,                    /* bitpos */                               
  300.      complain_overflow_bitfield, /* complain_on_overflow */
  301.      0,                /* special_function */                     
  302.      "R_RRTBA",             /* name */                                 
  303.      true,                    /* partial_inplace */                      
  304.      0xffffffff,            /* src_mask */                             
  305.      0xffffffff,            /* dst_mask */                             
  306.      false),                /* pcrel_offset */
  307.   
  308.   /* Modifiable call absolute indirect.  */
  309.   HOWTO (0x16,                    /* type */                                 
  310.      0,                    /* rightshift */                           
  311.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  312.      16,                    /* bitsize */                   
  313.      false,                    /* pc_relative */                          
  314.      0,                    /* bitpos */                               
  315.      complain_overflow_bitfield, /* complain_on_overflow */
  316.      0,                /* special_function */                     
  317.      "R_CAI",               /* name */                                 
  318.      true,                    /* partial_inplace */                      
  319.      0xffff,            /* src_mask */                             
  320.      0xffff,            /* dst_mask */                             
  321.      false),                /* pcrel_offset */
  322.   
  323.   /* Modifiable call relative.  */
  324.   HOWTO (0x17,                    /* type */                                 
  325.      0,                    /* rightshift */                           
  326.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  327.      16,                    /* bitsize */                   
  328.      false,                    /* pc_relative */                          
  329.      0,                    /* bitpos */                               
  330.      complain_overflow_bitfield, /* complain_on_overflow */
  331.      0,                /* special_function */                     
  332.      "R_REL",               /* name */                                 
  333.      true,                    /* partial_inplace */                      
  334.      0xffff,            /* src_mask */                             
  335.      0xffff,            /* dst_mask */                             
  336.      false),                /* pcrel_offset */
  337.   
  338.   /* Modifiable branch absolute.  */
  339.   HOWTO (0x18,                    /* type */                                 
  340.      0,                    /* rightshift */                           
  341.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  342.      16,                    /* bitsize */                   
  343.      false,                    /* pc_relative */                          
  344.      0,                    /* bitpos */                               
  345.      complain_overflow_bitfield, /* complain_on_overflow */
  346.      0,                /* special_function */                     
  347.      "R_RBA",               /* name */                                 
  348.      true,                    /* partial_inplace */                      
  349.      0xffff,            /* src_mask */                             
  350.      0xffff,            /* dst_mask */                             
  351.      false),                /* pcrel_offset */
  352.   
  353.   /* Modifiable branch absolute.  */
  354.   HOWTO (0x19,                    /* type */                                 
  355.      0,                    /* rightshift */                           
  356.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  357.      16,                    /* bitsize */                   
  358.      false,                    /* pc_relative */                          
  359.      0,                    /* bitpos */                               
  360.      complain_overflow_bitfield, /* complain_on_overflow */
  361.      0,                /* special_function */                     
  362.      "R_RBAC",              /* name */                                 
  363.      true,                    /* partial_inplace */                      
  364.      0xffff,            /* src_mask */                             
  365.      0xffff,            /* dst_mask */                             
  366.      false),                /* pcrel_offset */
  367.   
  368.   /* Modifiable branch relative.  */
  369.   HOWTO (0x1a,                    /* type */                                 
  370.      0,                    /* rightshift */                           
  371.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  372.      26,                    /* bitsize */                   
  373.      false,                    /* pc_relative */                          
  374.      0,                    /* bitpos */                               
  375.      complain_overflow_signed, /* complain_on_overflow */
  376.      0,                /* special_function */                     
  377.      "R_REL",               /* name */                                 
  378.      true,                    /* partial_inplace */                      
  379.      0xffff,            /* src_mask */                             
  380.      0xffff,            /* dst_mask */                             
  381.      false),                /* pcrel_offset */
  382.   
  383.   /* Modifiable branch absolute.  */
  384.   HOWTO (0x1b,                    /* type */                                 
  385.      0,                    /* rightshift */                           
  386.      2,                    /* size (0 = byte, 1 = short, 2 = long) */ 
  387.      16,                    /* bitsize */                   
  388.      false,                    /* pc_relative */                          
  389.      0,                    /* bitpos */                               
  390.      complain_overflow_bitfield, /* complain_on_overflow */
  391.      0,                /* special_function */                     
  392.      "R_REL",               /* name */                                 
  393.      true,                    /* partial_inplace */                      
  394.      0xffff,            /* src_mask */                             
  395.      0xffff,            /* dst_mask */                             
  396.      false)                 /* pcrel_offset */
  397. };
  398.  
  399. #define RTYPE2HOWTO(cache_ptr, dst) rs6000coff_rtype2howto (cache_ptr, dst)
  400.  
  401. static void rs6000coff_rtype2howto PARAMS ((arelent *,
  402.                         struct internal_reloc *));
  403.  
  404. static void
  405. rs6000coff_rtype2howto (relent, internal)
  406.      arelent *relent;
  407.      struct internal_reloc *internal;
  408. {
  409.   relent->howto = rs6000coff_howto_table + internal->r_type;
  410.  
  411.   /* The r_size field of an XCOFF reloc encodes the bitsize of the
  412.      relocation, as well as indicating whether it is signed or not.
  413.      Doublecheck that the relocation information gathered from the
  414.      type matches this information.  */
  415.   if (relent->howto->bitsize != (internal->r_size & 0x1f) + 1)
  416.     abort ();
  417. #if 0
  418.   if ((internal->r_size & 0x80) != 0
  419.       ? (relent->howto->complain_on_overflow != complain_overflow_signed)
  420.       : (relent->howto->complain_on_overflow != complain_overflow_bitfield))
  421.     abort ();
  422. #endif
  423. }
  424.  
  425. #define coff_bfd_reloc_type_lookup rs6000coff_reloc_type_lookup
  426.  
  427. static reloc_howto_type *rs6000coff_reloc_type_lookup
  428.   PARAMS ((bfd *, bfd_reloc_code_real_type));
  429.  
  430. static reloc_howto_type *
  431. rs6000coff_reloc_type_lookup (abfd, code)
  432.      bfd *abfd;
  433.      bfd_reloc_code_real_type code;
  434. {
  435.   switch (code)
  436.     {
  437.     case BFD_RELOC_PPC_B26:
  438.       return &rs6000coff_howto_table[0xa];
  439.     case BFD_RELOC_PPC_BA26:
  440.       return &rs6000coff_howto_table[8];
  441.     case BFD_RELOC_PPC_TOC16:
  442.       return &rs6000coff_howto_table[3];
  443.     case BFD_RELOC_32:
  444.       return &rs6000coff_howto_table[0];
  445.     default:
  446.       return NULL;
  447.     }
  448. }
  449.  
  450. #define SELECT_RELOC(internal, howto)                    \
  451.   {                                    \
  452.     internal.r_type = howto->type;                    \
  453.     internal.r_size =                            \
  454.       ((howto->complain_on_overflow == complain_overflow_signed        \
  455.     ? 0x80                                \
  456.     : 0)                                \
  457.        | (howto->bitsize - 1));                        \
  458.   }
  459.  
  460. #define COFF_LONG_FILENAMES
  461.  
  462. #include "coffcode.h"
  463.  
  464. #define    coff_archive_p        bfd_generic_archive_p
  465. #define    coff_mkarchive        _bfd_generic_mkarchive
  466.  
  467. #ifdef HOST_AIX
  468.  
  469. /* ------------------------------------------------------------------------ */
  470. /*    Support for archive file stuff..                    */
  471. /*    Stolen from Damon A. Permezel's `bfd' portation.            */
  472. /* ------------------------------------------------------------------------ */
  473.  
  474. #define rs6000coff_slurp_armap bfd_slurp_coff_armap
  475. #define rs6000coff_slurp_extended_name_table _bfd_slurp_extended_name_table
  476. #define rs6000coff_construct_extended_name_table \
  477.   _bfd_archive_coff_construct_extended_name_table
  478. #define rs6000coff_truncate_arname bfd_dont_truncate_arname
  479. #define rs6000coff_update_armap_timestamp bfd_true
  480.  
  481. #undef    coff_mkarchive
  482. #define    coff_mkarchive            rs6000coff_mkarchive
  483.  
  484. #undef    coff_archive_p
  485. #define    coff_archive_p            rs6000coff_archive_p
  486.  
  487. #include "/usr/include/ar.h"        /* <ar.h> doesn't do it.    */
  488.  
  489.  
  490. #define arch_hdr(bfd)         \
  491.     ((struct ar_hdr *)    \
  492.      (((struct areltdata *)((bfd)->arelt_data))->arch_header))
  493.  
  494.  
  495. static boolean
  496. rs6000coff_mkarchive (abfd)
  497.      bfd *abfd;
  498. {
  499.     bfd_set_error (bfd_error_invalid_operation);    /* write not supported    */
  500.     return false;
  501. }
  502.  
  503.  
  504. /* This functions reads an arch header and returns an areltdata pointer, or
  505.    NULL on error.
  506.  
  507.    Presumes the file pointer is already in the right place (ie pointing
  508.    to the ar_hdr in the file).   Moves the file pointer; on success it
  509.    should be pointing to the front of the file contents; on failure it
  510.    could have been moved arbitrarily.
  511. */
  512.  
  513. struct areltdata *
  514. rs6000coff_snarf_ar_hdr (abfd)
  515.      bfd *abfd;
  516. {
  517.     struct {
  518.         struct ar_hdr hdr;
  519.         char namebuf[256];
  520.     } h;
  521.     int size;
  522.     struct areltdata *ared;
  523.     char *allocptr;
  524.  
  525.     size = sizeof (h.hdr);
  526.     if (bfd_read(&h.hdr, 1, size, abfd) != size) {
  527.             if (bfd_get_error () != bfd_error_system_call)
  528.           bfd_set_error (bfd_error_no_more_archived_files);
  529.         return NULL;
  530.     }
  531.     size  = atoi(h.hdr.ar_namlen);    /* ar_name[] length    */
  532.     size += size & 1;
  533.  
  534.     if (bfd_read(&h.hdr._ar_name.ar_name[2], 1, size, abfd) != size) {
  535.             if (bfd_get_error () != bfd_error_system_call)
  536.           bfd_set_error (bfd_error_no_more_archived_files);
  537.         return NULL;
  538.     }
  539.  
  540.     if (strncmp(h.hdr._ar_name.ar_fmag + size, AIAFMAG, 2)) {
  541.         bfd_set_error (bfd_error_malformed_archive);
  542.         return NULL;
  543.     }
  544.  
  545.     h.hdr._ar_name.ar_name[size] = 0;    /* terminate filename    */
  546.  
  547.     /*
  548.      * if the filename is NULL, we're (probably) at the end.
  549.      */
  550.     if (size == 0) {
  551.         bfd_set_error (bfd_error_no_more_archived_files);
  552.         return NULL;
  553.     }
  554.  
  555.     size += sizeof (h.hdr);
  556.     allocptr = bfd_zalloc(abfd, sizeof (*ared) + size);
  557.  
  558.     if (allocptr == NULL) {
  559.         bfd_set_error (bfd_error_no_memory);
  560.         return NULL;
  561.     }
  562.  
  563.     ared = (struct areltdata *) allocptr;
  564.  
  565.     ared->arch_header = (void *) (allocptr + sizeof (struct areltdata));
  566.     memcpy ((char *) ared->arch_header, &h.hdr, size);
  567.     ared->parsed_size = atoi(h.hdr.ar_size);
  568.     ared->filename    = ((AR_HDR*) ared->arch_header)->_ar_name.ar_name;
  569.  
  570.     return ared;
  571. }
  572.  
  573. /* Stolen directly from archive.c, except it calls rs6000coff_snarf_ar_hdr.
  574.    Why wasn't this part of the transfer vector?  */
  575.  
  576. bfd *
  577. rs6000coff_get_elt_at_filepos (archive, filepos)
  578.      bfd *archive;
  579.      file_ptr filepos;
  580. {
  581.   struct areltdata *new_areldata;
  582.   bfd *n_nfd;
  583.  
  584.   n_nfd = _bfd_look_for_bfd_in_cache (archive, filepos);
  585.   if (n_nfd) return n_nfd;
  586.  
  587.   if (0 != bfd_seek (archive, filepos, SEEK_SET))
  588.     return NULL;
  589.  
  590.   if ((new_areldata = rs6000coff_snarf_ar_hdr (archive)) == NULL) return NULL;
  591.   
  592.   n_nfd = _bfd_create_empty_archive_element_shell (archive);
  593.   if (n_nfd == NULL) {
  594.     bfd_release (archive, (PTR)new_areldata);
  595.     return NULL;
  596.   }
  597.   n_nfd->origin = bfd_tell (archive);
  598.   n_nfd->arelt_data = (PTR) new_areldata;
  599.   n_nfd->filename = new_areldata->filename;
  600.  
  601.   if (_bfd_add_bfd_to_archive_cache (archive, filepos, n_nfd))
  602.     return n_nfd;
  603.  
  604.   /* huh? */
  605.   bfd_release (archive, (PTR)n_nfd);
  606.   bfd_release (archive, (PTR)new_areldata);
  607.   return NULL;
  608. }
  609.  
  610. /*
  611.  * xcoff_openr_next_archived_file -    xcoff has nxt/prv seek addrs.
  612.  */
  613. static bfd *
  614. rs6000coff_openr_next_archived_file(archive, last_file)
  615.   bfd *archive, *last_file; 
  616. {
  617.     file_ptr filestart;
  618.  
  619.     if (!last_file)
  620.         filestart = bfd_ardata(archive)->first_file_filepos;
  621.     else
  622.         filestart = atol(arch_hdr(last_file)->ar_nxtmem);
  623.  
  624.     return rs6000coff_get_elt_at_filepos (archive, filestart);
  625. }
  626.  
  627.  
  628. static const bfd_target *
  629. rs6000coff_archive_p (abfd)
  630.      bfd *abfd;
  631. {
  632.     struct fl_hdr hdr;
  633.     register struct artdata *art;
  634.  
  635.     if (bfd_read (&hdr, sizeof (hdr), 1, abfd) != sizeof (hdr)) {
  636.             if (bfd_get_error () != bfd_error_system_call)
  637.           bfd_set_error (bfd_error_wrong_format);
  638.         return 0;
  639.     }
  640.  
  641.     if (strncmp(hdr.fl_magic, AIAMAG, SAIAMAG)) {
  642.         bfd_set_error (bfd_error_wrong_format);
  643.         return 0;
  644.     }
  645.  
  646.     /*
  647.      * bfd_ardata() accesses the bfd->tdata field.
  648.      */
  649.     abfd->tdata.aout_ar_data =
  650.       (void *) bfd_zalloc(abfd, sizeof (*art) + sizeof (hdr));
  651.     if ((art = bfd_ardata (abfd)) == NULL) {
  652.         bfd_set_error (bfd_error_no_memory);
  653.         return 0;
  654.     }
  655.  
  656.     art->first_file_filepos = atoi(hdr.fl_fstmoff);
  657.     *(struct fl_hdr *) (1 + art) = hdr;
  658.  
  659.     /* Someday...
  660.      * slurp in the member table, which I think is the armap equivalent.
  661.     xcoff_slurp_armap(abfd);
  662.      */
  663.   
  664.     return abfd->xvec;
  665. }
  666.  
  667.  
  668. static int
  669. rs6000coff_generic_stat_arch_elt(abfd, buf)
  670.   bfd *abfd;
  671.   struct stat *buf;
  672. {
  673.     struct ar_hdr *hdr;
  674.     char *aloser;
  675.   
  676.     if (abfd->arelt_data == NULL) {
  677.         bfd_set_error (bfd_error_invalid_operation);
  678.         return -1;
  679.     }
  680.     
  681.     hdr = arch_hdr (abfd);
  682.  
  683. #define foo(arelt, stelt, size)  \
  684.     buf->stelt = strtol (hdr->arelt, &aloser, size); \
  685.         if (aloser == hdr->arelt) return -1;
  686.   
  687.     foo (ar_date, st_mtime, 10);
  688.     foo (ar_uid, st_uid, 10);
  689.     foo (ar_gid, st_gid, 10);
  690.     foo (ar_mode, st_mode, 8);
  691.     foo (ar_size, st_size, 10);
  692. #undef foo
  693.  
  694.     return 0;
  695. }
  696.  
  697. static boolean
  698. rs6000coff_write_armap (arch, elength, map, orl_count, stridx)
  699.   bfd *arch;
  700.   unsigned int elength;
  701.   struct orl *map; 
  702.   unsigned int orl_count;
  703.   int stridx;
  704. {
  705.     bfd_set_error (bfd_error_invalid_operation);
  706.     return false;
  707. }
  708. #endif    /* HOST_AIX */
  709.  
  710.  
  711. #define CORE_FILE_P _bfd_dummy_target
  712.  
  713. #define coff_core_file_failing_command _bfd_nocore_core_file_failing_command
  714. #define coff_core_file_failing_signal _bfd_nocore_core_file_failing_signal
  715. #define coff_core_file_matches_executable_p \
  716.   _bfd_nocore_core_file_matches_executable_p
  717.  
  718. #ifdef HOST_AIX
  719. #undef CORE_FILE_P
  720. #define CORE_FILE_P rs6000coff_core_p
  721. extern const bfd_target * rs6000coff_core_p ();
  722. extern boolean rs6000coff_get_section_contents ();
  723. extern boolean rs6000coff_core_file_matches_executable_p ();
  724.  
  725. #undef    coff_core_file_matches_executable_p
  726. #define coff_core_file_matches_executable_p  \
  727.                      rs6000coff_core_file_matches_executable_p
  728.  
  729. #undef    coff_get_section_contents
  730. #define    coff_get_section_contents    rs6000coff_get_section_contents
  731. #endif /* HOST_AIX */
  732.  
  733. #ifdef HOST_LYNX
  734.  
  735. #undef CORE_FILE_P
  736. #define CORE_FILE_P lynx_core_file_p
  737. extern const bfd_target *lynx_core_file_p PARAMS ((bfd *abfd));
  738.  
  739. extern boolean lynx_core_file_matches_executable_p PARAMS ((bfd *core_bfd,
  740.                                 bfd *exec_bfd));
  741. #undef    coff_core_file_matches_executable_p
  742. #define coff_core_file_matches_executable_p lynx_core_file_matches_executable_p
  743.  
  744. extern char *lynx_core_file_failing_command PARAMS ((bfd *abfd));
  745. #undef coff_core_file_failing_command
  746. #define coff_core_file_failing_command lynx_core_file_failing_command
  747.  
  748. extern int lynx_core_file_failing_signal PARAMS ((bfd *abfd));
  749. #undef coff_core_file_failing_signal
  750. #define coff_core_file_failing_signal lynx_core_file_failing_signal
  751.  
  752. #endif /* HOST_LYNX */
  753.  
  754. /* The transfer vector that leads the outside world to all of the above. */
  755.  
  756. const bfd_target rs6000coff_vec =
  757. {
  758.   "aixcoff-rs6000",        /* name */
  759.   bfd_target_coff_flavour,    
  760.   true,                /* data byte order is big */
  761.   true,                /* header byte order is big */
  762.  
  763.   (HAS_RELOC | EXEC_P |        /* object flags */
  764.    HAS_LINENO | HAS_DEBUG |
  765.    HAS_SYMS | HAS_LOCALS | WP_TEXT),
  766.  
  767.   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
  768.   0,                /* leading char */
  769.   '/',                /* ar_pad_char */
  770.   15,                /* ar_max_namelen??? FIXMEmgo */
  771.   3,                /* default alignment power */
  772.  
  773.   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  774.      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  775.      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
  776.   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  777.      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  778.      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
  779.  
  780.   {_bfd_dummy_target, coff_object_p,     /* bfd_check_format */
  781.      coff_archive_p, CORE_FILE_P},
  782.   {bfd_false, coff_mkobject, coff_mkarchive, /* bfd_set_format */
  783.      bfd_false},
  784.   {bfd_false, coff_write_object_contents,    /* bfd_write_contents */
  785.      _bfd_write_archive_contents, bfd_false},
  786.  
  787.      BFD_JUMP_TABLE_GENERIC (coff),
  788.      BFD_JUMP_TABLE_COPY (coff),
  789.      BFD_JUMP_TABLE_CORE (coff),
  790. #ifdef HOST_AIX
  791.      BFD_JUMP_TABLE_ARCHIVE (rs6000coff),
  792. #else
  793.      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
  794. #endif
  795.      BFD_JUMP_TABLE_SYMBOLS (coff),
  796.      BFD_JUMP_TABLE_RELOCS (coff),
  797.      BFD_JUMP_TABLE_WRITE (coff),
  798.      BFD_JUMP_TABLE_LINK (coff),
  799.      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
  800.  
  801.   COFF_SWAP_TABLE,
  802. };
  803.