| 1 | /* Handle COFF SVR3 shared libraries for GDB, the GNU Debugger. |
| 2 | Copyright 1993 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | |
| 21 | #include "defs.h" |
| 22 | |
| 23 | #include "frame.h" |
| 24 | #include "bfd.h" |
| 25 | #include "gdbcore.h" |
| 26 | #include "symtab.h" |
| 27 | |
| 28 | /* |
| 29 | |
| 30 | GLOBAL FUNCTION |
| 31 | |
| 32 | coff_solib_add -- add a shared library files to the symtab list. We |
| 33 | examine the `.lib' section of the exec file and determine the names of |
| 34 | the shared libraries. |
| 35 | |
| 36 | This function is responsible for discovering those names and |
| 37 | addresses, and saving sufficient information about them to allow |
| 38 | their symbols to be read at a later time. |
| 39 | |
| 40 | SYNOPSIS |
| 41 | |
| 42 | void coff_solib_add (char *arg_string, int from_tty, |
| 43 | struct target_ops *target) |
| 44 | |
| 45 | DESCRIPTION |
| 46 | |
| 47 | */ |
| 48 | |
| 49 | void |
| 50 | coff_solib_add (arg_string, from_tty, target) |
| 51 | char *arg_string; |
| 52 | int from_tty; |
| 53 | struct target_ops *target; |
| 54 | { |
| 55 | asection *libsect; |
| 56 | |
| 57 | libsect = bfd_get_section_by_name (exec_bfd, ".lib"); |
| 58 | |
| 59 | if (libsect) |
| 60 | { |
| 61 | int libsize; |
| 62 | unsigned char *lib; |
| 63 | struct libent |
| 64 | { |
| 65 | bfd_byte len[4]; |
| 66 | bfd_byte nameoffset[4]; |
| 67 | }; |
| 68 | |
| 69 | libsize = bfd_section_size (exec_bfd, libsect); |
| 70 | |
| 71 | lib = (unsigned char *) alloca (libsize); |
| 72 | |
| 73 | bfd_get_section_contents (exec_bfd, libsect, lib, 0, libsize); |
| 74 | |
| 75 | while (libsize > 0) |
| 76 | { |
| 77 | struct libent *ent; |
| 78 | struct objfile *objfile; |
| 79 | int len, nameoffset; |
| 80 | char *filename; |
| 81 | |
| 82 | ent = (struct libent *)lib; |
| 83 | |
| 84 | len = bfd_get_32 (exec_bfd, ent->len); |
| 85 | |
| 86 | nameoffset = bfd_get_32 (exec_bfd, ent->nameoffset); |
| 87 | |
| 88 | if (len <= 0) |
| 89 | break; |
| 90 | |
| 91 | filename = (char *)ent + nameoffset * 4; |
| 92 | |
| 93 | objfile = symbol_file_add (filename, from_tty, |
| 94 | 0, /* addr */ |
| 95 | 0, /* not mainline */ |
| 96 | 0, /* not mapped */ |
| 97 | 0); /* Not readnow */ |
| 98 | libsize -= len * 4; |
| 99 | lib += len * 4; |
| 100 | } |
| 101 | |
| 102 | /* Getting new symbols may change our opinion about what is |
| 103 | frameless. */ |
| 104 | reinit_frame_cache (); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | |
| 110 | GLOBAL FUNCTION |
| 111 | |
| 112 | coff_solib_create_inferior_hook -- shared library startup support |
| 113 | |
| 114 | SYNOPSIS |
| 115 | |
| 116 | void coff_solib_create_inferior_hook() |
| 117 | |
| 118 | DESCRIPTION |
| 119 | |
| 120 | When gdb starts up the inferior, the kernel maps in the shared |
| 121 | libraries. We get here with the target stopped at it's first |
| 122 | instruction, and the libraries already mapped. At this point, this |
| 123 | function gets called via expansion of the macro |
| 124 | SOLIB_CREATE_INFERIOR_HOOK. |
| 125 | */ |
| 126 | |
| 127 | void |
| 128 | coff_solib_create_inferior_hook() |
| 129 | { |
| 130 | coff_solib_add ((char *) 0, 0, (struct target_ops *) 0); |
| 131 | } |