* hpux-core.c (thread_section_p): New function.

        (hpux_core_core_file_p): Fix computation of offset in call
        to bfd_seek. Create a ".reg" section from an arbitrary
        ".reg/<id>" section if none was created after having read
        all sections.

2 files changed, 43 insertions, 1 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 8a8e99109bb..8ef66c6e24d 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,11 @@
+2004-09-10  Joel Brobecker  <brobecker@gnat.com>
+
+	* hpux-core.c (thread_section_p): New function.
+	(hpux_core_core_file_p): Fix computation of offset in call
+	to bfd_seek. Create a ".reg" section from an arbitrary
+	".reg/<id>" section if none was created after having read
+	all sections.
+
 2004-09-11  Andreas Schwab  <schwab@suse.de>
 
 	* acinclude.m4: Fix spelling of ACX_NONCANONICAL_*.
diff --git a/bfd/hpux-core.c b/bfd/hpux-core.c
index 32b4eb41788..347de2170f3 100644
--- a/bfd/hpux-core.c
+++ b/bfd/hpux-core.c
@@ -145,6 +145,17 @@ make_bfd_asection (abfd, name, flags, size, vma, alignment_power)
   return asect;
 }
 
+/* Return true if the given core file section corresponds to a thread,
+   based on its name.  */
+
+static int
+thread_section_p (bfd *abfd ATTRIBUTE_UNUSED,
+                  asection *sect,
+                  void *obj ATTRIBUTE_UNUSED)
+{
+  return (strncmp (bfd_section_name (abfd, sect), ".reg/", 5) == 0);
+}
+
 /* this function builds a bfd target if the file is a corefile.
    It returns null or 0 if it finds out thaat it is not a core file.
    The way it checks this is by looking for allowed 'type' field values.
@@ -207,7 +218,7 @@ hpux_core_core_file_p (abfd)
 
               /* However, we also want to create those sections with the
                  file positioned at the start of the record, it seems. */
-            if (bfd_seek (abfd, (file_ptr) -core_header.len, SEEK_CUR) != 0)
+            if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0)
               break;
 
 #if defined(PROC_INFO_HAS_THREAD_ID)
@@ -301,6 +312,29 @@ hpux_core_core_file_p (abfd)
 
   /* OK, we believe you.  You're a core file (sure, sure).  */
 
+  /* On HP/UX, we sometimes encounter core files where none of the threads
+     was found to be the running thread (ie the signal was set to -1 for
+     all threads).  This happens when the program was aborted externally
+     via a TT_CORE ttrace system call.  In that case, we just pick one
+     thread at random to be the active thread.  */
+  if (core_kernel_thread_id (abfd) != 0
+      && bfd_get_section_by_name (abfd, ".reg") == NULL)
+    {
+      asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL);
+      asection *reg_sect;
+
+      if (asect != NULL)
+        {
+          reg_sect = make_bfd_asection (abfd, ".reg", asect->flags,
+                                        asect->size, asect->vma,
+                                        asect->alignment_power);
+          if (reg_sect == NULL)
+            goto fail;
+
+          reg_sect->filepos = asect->filepos;
+        }
+    }
+
   /* Were there sections of unknown type?  If so, yet there were
      at least some complete sections of known type, then, issue
      a warning.  Possibly the core file was generated on a version