| /* Provide legacy r_debug and link_map support for SVR4-like native targets. |
| Copyright 2000, 2001 |
| Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "gdbcore.h" |
| #include "solib-svr4.h" |
| |
| #ifdef HAVE_LINK_H |
| |
| #ifdef HAVE_NLIST_H |
| /* nlist.h needs to be included before link.h on some older *BSD systems. */ |
| #include <nlist.h> |
| #endif |
| |
| #include <link.h> |
| |
| /* Fetch (and possibly build) an appropriate link_map_offsets structure |
| for native targets using struct definitions from link.h. */ |
| |
| static struct link_map_offsets * |
| legacy_svr4_fetch_link_map_offsets (void) |
| { |
| static struct link_map_offsets lmo; |
| static struct link_map_offsets *lmp = 0; |
| #if defined (HAVE_STRUCT_LINK_MAP32) |
| static struct link_map_offsets lmo32; |
| static struct link_map_offsets *lmp32 = 0; |
| #endif |
| |
| #ifndef offsetof |
| #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) |
| #endif |
| #define fieldsize(TYPE, MEMBER) (sizeof (((TYPE *)0)->MEMBER)) |
| |
| if (lmp == 0) |
| { |
| lmp = &lmo; |
| |
| #ifdef HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS |
| lmo.r_debug_size = sizeof (struct r_debug); |
| |
| lmo.r_map_offset = offsetof (struct r_debug, r_map); |
| lmo.r_map_size = fieldsize (struct r_debug, r_map); |
| |
| lmo.link_map_size = sizeof (struct link_map); |
| |
| lmo.l_addr_offset = offsetof (struct link_map, l_addr); |
| lmo.l_addr_size = fieldsize (struct link_map, l_addr); |
| |
| lmo.l_next_offset = offsetof (struct link_map, l_next); |
| lmo.l_next_size = fieldsize (struct link_map, l_next); |
| |
| lmo.l_prev_offset = offsetof (struct link_map, l_prev); |
| lmo.l_prev_size = fieldsize (struct link_map, l_prev); |
| |
| lmo.l_name_offset = offsetof (struct link_map, l_name); |
| lmo.l_name_size = fieldsize (struct link_map, l_name); |
| #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS) */ |
| #ifdef HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS |
| lmo.link_map_size = sizeof (struct link_map); |
| |
| lmo.l_addr_offset = offsetof (struct link_map, lm_addr); |
| lmo.l_addr_size = fieldsize (struct link_map, lm_addr); |
| |
| lmo.l_next_offset = offsetof (struct link_map, lm_next); |
| lmo.l_next_size = fieldsize (struct link_map, lm_next); |
| |
| lmo.l_name_offset = offsetof (struct link_map, lm_name); |
| lmo.l_name_size = fieldsize (struct link_map, lm_name); |
| #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS) */ |
| #if HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS |
| lmo.link_map_size = sizeof (struct so_map); |
| |
| lmo.l_addr_offset = offsetof (struct so_map, som_addr); |
| lmo.l_addr_size = fieldsize (struct so_map, som_addr); |
| |
| lmo.l_next_offset = offsetof (struct so_map, som_next); |
| lmo.l_next_size = fieldsize (struct so_map, som_next); |
| |
| lmo.l_name_offset = offsetof (struct so_map, som_path); |
| lmo.l_name_size = fieldsize (struct so_map, som_path); |
| #endif /* HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS */ |
| #endif /* HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS */ |
| #endif /* HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS */ |
| } |
| |
| #if defined (HAVE_STRUCT_LINK_MAP32) |
| if (lmp32 == 0) |
| { |
| lmp32 = &lmo32; |
| |
| lmo32.r_debug_size = sizeof (struct r_debug32); |
| |
| lmo32.r_map_offset = offsetof (struct r_debug32, r_map); |
| lmo32.r_map_size = fieldsize (struct r_debug32, r_map); |
| |
| lmo32.link_map_size = sizeof (struct link_map32); |
| |
| lmo32.l_addr_offset = offsetof (struct link_map32, l_addr); |
| lmo32.l_addr_size = fieldsize (struct link_map32, l_addr); |
| |
| lmo32.l_next_offset = offsetof (struct link_map32, l_next); |
| lmo32.l_next_size = fieldsize (struct link_map32, l_next); |
| |
| lmo32.l_prev_offset = offsetof (struct link_map32, l_prev); |
| lmo32.l_prev_size = fieldsize (struct link_map32, l_prev); |
| |
| lmo32.l_name_offset = offsetof (struct link_map32, l_name); |
| lmo32.l_name_size = fieldsize (struct link_map32, l_name); |
| } |
| #endif /* defined (HAVE_STRUCT_LINK_MAP32) */ |
| |
| #if defined (HAVE_STRUCT_LINK_MAP32) |
| if (exec_bfd != NULL) |
| { |
| if (bfd_get_arch_size (exec_bfd) == 32) |
| return lmp32; |
| } |
| if (TARGET_PTR_BIT == 32) |
| return lmp32; |
| #endif |
| return lmp; |
| } |
| |
| #endif /* HAVE_LINK_H */ |
| |
| extern initialize_file_ftype _initialize_svr4_lm; /* -Wmissing-prototypes */ |
| |
| void |
| _initialize_svr4_lm (void) |
| { |
| #ifdef HAVE_LINK_H |
| legacy_svr4_fetch_link_map_offsets_hook = legacy_svr4_fetch_link_map_offsets; |
| #endif /* HAVE_LINK_H */ |
| } |