Cleanup solib-svr4.c by moving legacy code out to its own file.

gdb/solib-legacy.c

@@ -0,0 +1,127 @@
+/* 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.  */
+
+#define _SYSCALL32	/* for Sparc64 cross Sparc32 */
+#include "defs.h"
+#include "gdbcore.h"
+#include "solib-svr4.h"
+
+#ifdef HAVE_LINK_H
+#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 SVR4_SHARED_LIBS
+      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 /* !SVR4_SHARED_LIBS */
+      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);
+#endif /* SVR4_SHARED_LIBS */
+    }
+
+#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 (bfd_get_arch_size (exec_bfd) == 32)
+    return lmp32;
+  else
+#endif
+    return lmp;
+}
+
+#endif /* HAVE_LINK_H */
+
+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 */
+}