[commit] mn10300-linux: Add shared library support

[Kevin Buettner]

I've just committed the patch below.

	* mn10300-linux-tdep.c (solib-svr4.h): Include.
	(mn10300_linux_svr4_fetch_link_map_offsets): New function.
	(am33_linux_init_osabi): Register it.
	* Makefile.in (mn10300-linux-tdep.o): Update dependencies.

Index: Makefile.in
===================================================================
RCS file: /cvs/src/src/gdb/Makefile.in,v
retrieving revision 1.751
diff -u -p -r1.751 Makefile.in
--- Makefile.in	3 Sep 2005 00:35:45 -0000	1.751
+++ Makefile.in	6 Sep 2005 23:09:56 -0000
@@ -2306,7 +2306,8 @@ mips-tdep.o: mips-tdep.c $(defs_h) $(gdb
 mipsv4-nat.o: mipsv4-nat.c $(defs_h) $(inferior_h) $(gdbcore_h) $(target_h) \
 	$(regcache_h) $(gregset_h)
 mn10300-linux-tdep.o: mn10300-linux-tdep.c $(defs_h) $(gdbcore_h) \
-	$(gdb_string_h) $(regcache_h) $(mn10300_tdep_h)
+	$(gdb_string_h) $(regcache_h) $(mn10300_tdep_h) $(gdb_assert_h) \
+	$(bfd_h) $(elf_bfd_h) $(osabi_h) $(regset_h) $(solib_svr4_h)
 mn10300-tdep.o: mn10300-tdep.c $(defs_h) $(arch_utils_h) $(dis_asm_h) \
 	$(gdbtypes_h) $(regcache_h) $(gdb_string_h) $(gdb_assert_h) \
 	$(frame_h) $(frame_unwind_h) $(frame_base_h) $(trad_frame_h) \
Index: mn10300-linux-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/mn10300-linux-tdep.c,v
retrieving revision 1.1
diff -u -p -r1.1 mn10300-linux-tdep.c
--- mn10300-linux-tdep.c	2 Sep 2005 22:53:33 -0000	1.1
+++ mn10300-linux-tdep.c	6 Sep 2005 23:09:56 -0000
@@ -29,6 +29,7 @@
 #include "elf-bfd.h"
 #include "osabi.h"
 #include "regset.h"
+#include "solib-svr4.h"
 
 #include <stdlib.h>
 
@@ -467,6 +468,49 @@ am33_regset_from_core_section (struct gd
 			 am33_collect_gregset_method);
 }
 
+/* Fetch, and possibly build, an appropriate link_map_offsets structure
+   for mn10300 linux targets using the struct offsets defined in <link.h>.
+   Note, however, that link.h is not actually referred to in this file.
+   Instead, the relevant structs offsets were obtained from examining
+   link.h.  (We can't refer to link.h from this file because the host
+   system won't necessarily have it, or if it does, the structs which
+   it defines will refer to the host system, not the target.)  */
+
+struct link_map_offsets *
+mn10300_linux_svr4_fetch_link_map_offsets (void)
+{
+  static struct link_map_offsets lmo;
+  static struct link_map_offsets *lmp = 0;
+
+  if (lmp == 0)
+    {
+      lmp = &lmo;
+
+      lmo.r_debug_size = 8;	/* Actual size is 20, but this is all we
+                                   need. */
+
+      lmo.r_map_offset = 4;
+      lmo.r_map_size   = 4;
+
+      lmo.link_map_size = 20;	/* Might be larger, but this is all we
+                                   need. */
+
+      lmo.l_addr_offset = 0;
+      lmo.l_addr_size   = 4;
+
+      lmo.l_name_offset = 4;
+      lmo.l_name_size   = 4;
+
+      lmo.l_next_offset = 12;
+      lmo.l_next_size   = 4;
+
+      lmo.l_prev_offset = 16;
+      lmo.l_prev_size   = 4;
+    }
+
+    return lmp;
+}
+
 /* AM33 Linux osabi has been recognized.
    Now's our chance to register our corefile handling.  */
 
@@ -475,6 +519,8 @@ am33_linux_init_osabi (struct gdbarch_in
 {
   set_gdbarch_regset_from_core_section (gdbarch, 
 					am33_regset_from_core_section);
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, mn10300_linux_svr4_fetch_link_map_offsets);
 }
 
 void