* gdbarch.sh (LC_ALL): Set to `c'.

[deliverable/binutils-gdb.git] / gdb / solib-svr4.c

diff --git a/gdb/solib-svr4.c b/gdb/solib-svr4.c
index 987e776df3ad392c2887d2275198d31439e6da04..1a7ffbf487077938219e09f7ca92177783125139 100644 (file)
--- a/gdb/solib-svr4.c
+++ b/gdb/solib-svr4.c
@@ -92,6 +92,7 @@ static char *bkpt_names[] =
   SOLIB_BKPT_NAME,             /* Prefer configured name if it exists. */
 #endif
   "_start",
+  "__start",
   "main",
   NULL
 };
@@ -1110,8 +1111,8 @@ svr4_relocate_main_executable (void)
       displacement = pc - bfd_get_start_address (exec_bfd);
       changed = 0;
 
-      new_offsets = xcalloc (sizeof (struct section_offsets),
-                            symfile_objfile->num_sections);
+      new_offsets = xcalloc (symfile_objfile->num_sections,
+                            sizeof (struct section_offsets));
       old_chain = make_cleanup (xfree, new_offsets);
 
       for (i = 0; i < symfile_objfile->num_sections; i++)
@@ -1228,14 +1229,41 @@ svr4_free_so (struct so_list *so)
   xfree (so->lm_info);
 }
 
+
+/* Clear any bits of ADDR that wouldn't fit in a target-format
+   data pointer.  "Data pointer" here refers to whatever sort of
+   address the dynamic linker uses to manage its sections.  At the
+   moment, we don't support shared libraries on any processors where
+   code and data pointers are different sizes.
+
+   This isn't really the right solution.  What we really need here is
+   a way to do arithmetic on CORE_ADDR values that respects the
+   natural pointer/address correspondence.  (For example, on the MIPS,
+   converting a 32-bit pointer to a 64-bit CORE_ADDR requires you to
+   sign-extend the value.  There, simply truncating the bits above
+   TARGET_PTR_BIT, as we do below, is no good.)  This should probably
+   be a new gdbarch method or something.  */
+static CORE_ADDR
+svr4_truncate_ptr (CORE_ADDR addr)
+{
+  if (TARGET_PTR_BIT == sizeof (CORE_ADDR) * 8)
+    /* We don't need to truncate anything, and the bit twiddling below
+       will fail due to overflow problems.  */
+    return addr;
+  else
+    return addr & (((CORE_ADDR) 1 << TARGET_PTR_BIT) - 1);
+}
+
+
 static void
 svr4_relocate_section_addresses (struct so_list *so,
                                  struct section_table *sec)
 {
-  sec->addr += LM_ADDR (so);
-  sec->endaddr += LM_ADDR (so);
+  sec->addr    = svr4_truncate_ptr (sec->addr    + LM_ADDR (so));
+  sec->endaddr = svr4_truncate_ptr (sec->endaddr + LM_ADDR (so));
 }
 
+
 /* Fetch a link_map_offsets structure for native targets using struct
    definitions from link.h.  See solib-legacy.c for the function
    which does the actual work.