Extend GDB to check the value in the .note.tag section along with the

.note.ABI-tag section.

This helps on ARM EABI where the OS/ABI field is zero. It would be better
to use the NOTES program header however this would require a more invasive
change.

2 files changed, 18 insertions, 0 deletions

diff --git a/contrib/binutils/include/elf/common.h b/contrib/binutils/include/elf/common.h
index bb50a5c..f2e5022 100644
--- a/contrib/binutils/include/elf/common.h
+++ b/contrib/binutils/include/elf/common.h
@@ -435,6 +435,10 @@
 
 #define NT_FREEBSD_ABI_TAG	1
 
+/* Values for FreeBSD .note.tag notes.  Note name is "FreeBSD".  */
+
+#define NT_FREEBSD_TAG		2
+
 /* These three macros disassemble and assemble a symbol table st_info field,
    which contains the symbol binding and symbol type.  The STB_ and STT_
    defines identify the binding and type.  */
diff --git a/contrib/gdb/gdb/osabi.c b/contrib/gdb/gdb/osabi.c
index 3acfc70..4e43df5 100644
--- a/contrib/gdb/gdb/osabi.c
+++ b/contrib/gdb/gdb/osabi.c
@@ -463,6 +463,20 @@ generic_elf_osabi_sniff_abi_tag_sections: unknown OS number %d",
 
       return;
     }
+
+  /* .note.tag notes, used by FreeBSD.  */
+  if (strcmp (name, ".note.tag") == 0)
+   {
+      /* FreeBSD.  */
+      if (check_note (abfd, sect, note, "FreeBSD", 4, NT_FREEBSD_TAG))
+	{
+	  /* There is no need to check the version yet.  */
+	  *osabi = GDB_OSABI_FREEBSD_ELF;
+	  return;
+	}
+
+      return;
+    }
       
   /* .note.netbsd.ident notes, used by NetBSD.  */
   if (strcmp (name, ".note.netbsd.ident") == 0