135 lines
4.5 KiB
C
135 lines
4.5 KiB
C
/* Provide legacy r_debug and link_map support for SVR4-like native targets.
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Copyright (C) 2000, 2001, 2006, 2007 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License 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 this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "defs.h"
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#include "gdbcore.h"
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#include "solib-svr4.h"
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#ifdef HAVE_LINK_H
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#ifdef HAVE_NLIST_H
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/* nlist.h needs to be included before link.h on some older *BSD systems. */
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#include <nlist.h>
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#endif
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#include <link.h>
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/* Fetch (and possibly build) an appropriate link_map_offsets structure
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for native targets using struct definitions from link.h. */
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static struct link_map_offsets *
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legacy_svr4_fetch_link_map_offsets (void)
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{
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static struct link_map_offsets lmo;
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static struct link_map_offsets *lmp = 0;
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#if defined (HAVE_STRUCT_LINK_MAP32)
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static struct link_map_offsets lmo32;
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static struct link_map_offsets *lmp32 = 0;
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#endif
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#ifndef offsetof
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#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
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#endif
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#define fieldsize(TYPE, MEMBER) (sizeof (((TYPE *)0)->MEMBER))
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if (lmp == 0)
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{
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lmp = &lmo;
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#ifdef HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS
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lmo.r_version_offset = offsetof (struct r_debug, r_version);
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lmo.r_version_size = fieldsize (struct r_debug, r_version);
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lmo.r_map_offset = offsetof (struct r_debug, r_map);
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lmo.r_ldsomap_offset = -1;
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lmo.link_map_size = sizeof (struct link_map);
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lmo.l_addr_offset = offsetof (struct link_map, l_addr);
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lmo.l_next_offset = offsetof (struct link_map, l_next);
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lmo.l_ld_offset = offsetof (struct link_map, l_ld);
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lmo.l_prev_offset = offsetof (struct link_map, l_prev);
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lmo.l_name_offset = offsetof (struct link_map, l_name);
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#else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS) */
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#ifdef HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS
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lmo.link_map_size = sizeof (struct link_map);
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lmo.l_addr_offset = offsetof (struct link_map, lm_addr);
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lmo.l_next_offset = offsetof (struct link_map, lm_next);
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/* FIXME: Is this the right field name, or is it available at all? */
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lmo.l_ld_offset = offsetof (struct link_map, lm_ld);
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lmo.l_name_offset = offsetof (struct link_map, lm_name);
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#else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS) */
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#if HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS
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lmo.link_map_size = sizeof (struct so_map);
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lmo.l_addr_offset = offsetof (struct so_map, som_addr);
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lmo.l_next_offset = offsetof (struct so_map, som_next);
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lmo.l_name_offset = offsetof (struct so_map, som_path);
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/* FIXME: Is the address of the dynamic table available? */
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lmo.l_ld_offset = -1;
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#endif /* HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS */
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#endif /* HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS */
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#endif /* HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS */
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}
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#if defined (HAVE_STRUCT_LINK_MAP32)
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if (lmp32 == 0)
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{
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lmp32 = &lmo32;
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lmo32.r_version_offset = offsetof (struct r_debug32, r_version);
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lmo32.r_version_size = fieldsize (struct r_debug32, r_version);
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lmo32.r_map_offset = offsetof (struct r_debug32, r_map);
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lmo32.r_ldsomap_offset = -1;
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lmo32.link_map_size = sizeof (struct link_map32);
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lmo32.l_addr_offset = offsetof (struct link_map32, l_addr);
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lmo32.l_next_offset = offsetof (struct link_map32, l_next);
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lmo32.l_prev_offset = offsetof (struct link_map32, l_prev);
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lmo32.l_name_offset = offsetof (struct link_map32, l_name);
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}
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#endif /* defined (HAVE_STRUCT_LINK_MAP32) */
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#if defined (HAVE_STRUCT_LINK_MAP32)
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if (exec_bfd != NULL)
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{
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if (bfd_get_arch_size (exec_bfd) == 32)
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return lmp32;
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}
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if (gdbarch_ptr_bit (current_gdbarch) == 32)
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return lmp32;
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#endif
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return lmp;
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}
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#endif /* HAVE_LINK_H */
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extern initialize_file_ftype _initialize_svr4_lm; /* -Wmissing-prototypes */
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void
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_initialize_svr4_lm (void)
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{
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#ifdef HAVE_LINK_H
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legacy_svr4_fetch_link_map_offsets_hook = legacy_svr4_fetch_link_map_offsets;
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#endif /* HAVE_LINK_H */
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}
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