1 /* Handle COFF SVR3 shared libraries for GDB, the GNU Debugger. 2 Copyright 1993, 1994, 1998, 1999, 2000 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, 19 Boston, MA 02111-1307, USA. */ 20 21 22 #include "defs.h" 23 24 #include "frame.h" 25 #include "bfd.h" 26 #include "gdbcore.h" 27 #include "symtab.h" 28 #include "symfile.h" 29 #include "objfiles.h" 30 31 /* 32 33 GLOBAL FUNCTION 34 35 coff_solib_add -- add a shared library files to the symtab list. We 36 examine the `.lib' section of the exec file and determine the names of 37 the shared libraries. 38 39 This function is responsible for discovering those names and 40 addresses, and saving sufficient information about them to allow 41 their symbols to be read at a later time. 42 43 SYNOPSIS 44 45 void coff_solib_add (char *arg_string, int from_tty, 46 struct target_ops *target, int readsyms) 47 48 DESCRIPTION 49 50 */ 51 52 void 53 coff_solib_add (char *arg_string, int from_tty, struct target_ops *target, int readsyms) 54 { 55 asection *libsect; 56 57 if (!readsyms) 58 return; 59 60 libsect = bfd_get_section_by_name (exec_bfd, ".lib"); 61 62 if (libsect) 63 { 64 int libsize; 65 unsigned char *lib; 66 struct libent 67 { 68 bfd_byte len[4]; 69 bfd_byte nameoffset[4]; 70 }; 71 72 libsize = bfd_section_size (exec_bfd, libsect); 73 74 lib = (unsigned char *) alloca (libsize); 75 76 bfd_get_section_contents (exec_bfd, libsect, lib, 0, libsize); 77 78 while (libsize > 0) 79 { 80 struct libent *ent; 81 struct objfile *objfile; 82 int len, nameoffset; 83 char *filename; 84 85 ent = (struct libent *) lib; 86 87 len = bfd_get_32 (exec_bfd, ent->len); 88 89 nameoffset = bfd_get_32 (exec_bfd, ent->nameoffset); 90 91 if (len <= 0) 92 break; 93 94 filename = (char *) ent + nameoffset * 4; 95 96 objfile = symbol_file_add (filename, from_tty, 97 NULL, /* no offsets */ 98 0, /* not mainline */ 99 OBJF_SHARED); /* flags */ 100 101 libsize -= len * 4; 102 lib += len * 4; 103 } 104 105 /* Getting new symbols may change our opinion about what is 106 frameless. */ 107 reinit_frame_cache (); 108 } 109 } 110 111 /* 112 113 GLOBAL FUNCTION 114 115 coff_solib_create_inferior_hook -- shared library startup support 116 117 SYNOPSIS 118 119 void coff_solib_create_inferior_hook() 120 121 DESCRIPTION 122 123 When gdb starts up the inferior, the kernel maps in the shared 124 libraries. We get here with the target stopped at it's first 125 instruction, and the libraries already mapped. At this point, this 126 function gets called via expansion of the macro 127 SOLIB_CREATE_INFERIOR_HOOK. 128 */ 129 130 void 131 coff_solib_create_inferior_hook (void) 132 { 133 coff_solib_add ((char *) 0, 0, (struct target_ops *) 0, auto_solib_add); 134 } 135