Improve readelf notes output for Linux ELF files

Add four ELF note constants:
- NT_FILE and NT_SIGINFO (core file notes output by recent Linux kernels)
- NT_GNU_ABI_TAG (was incorrectly reported as NT_VERSION)
- NT_GNU_BUILD_ID (used for locating standalone debug files)

Approved by:	re (kib)

2 files changed, 30 insertions, 0 deletions

diff --git a/contrib/binutils/binutils/readelf.c b/contrib/binutils/binutils/readelf.c
index a70e3c3..a4adb78 100644
--- a/contrib/binutils/binutils/readelf.c
+++ b/contrib/binutils/binutils/readelf.c
@@ -9109,6 +9109,10 @@ get_note_type (unsigned e_type)
 	return _("NT_LWPSINFO (lwpsinfo_t structure)");
       case NT_WIN32PSTATUS:
 	return _("NT_WIN32PSTATUS (win32_pstatus structure)");
+      case NT_FILE:
+        return _("NT_FILE");
+      case NT_SIGINFO:
+        return _("NT_SIGINFO");
       default:
 	break;
       }
@@ -9174,6 +9178,23 @@ get_freebsd_note_type (unsigned e_type)
 }
 
 static const char *
+get_gnu_note_type (unsigned e_type)
+{
+  static char buff[64];
+
+  switch (e_type)
+    {
+    case NT_GNU_ABI_TAG:
+      return _("NT_GNU_ABI_TAG");
+    case NT_GNU_BUILD_ID:
+      return _("NT_GNU_BUILD_ID");
+    }
+
+  snprintf (buff, sizeof(buff), _("Unknown GNU note type: (0x%08x)"), e_type);
+  return buff;
+}
+
+static const char *
 get_netbsd_elfcore_note_type (unsigned e_type)
 {
   static char buff[64];
@@ -9254,6 +9275,10 @@ process_note (Elf_Internal_Note *pnote)
     /* FreeBSD-specific core file notes.  */
     nt = get_freebsd_note_type (pnote->type);
 
+  else if (const_strneq (pnote->namedata, "GNU"))
+    /* GNU-specific notes */
+    nt = get_gnu_note_type (pnote->type);
+
   else if (const_strneq (pnote->namedata, "NetBSD-CORE"))
     /* NetBSD-specific core file notes.  */
     nt = get_netbsd_elfcore_note_type (pnote->type);
diff --git a/contrib/binutils/include/elf/common.h b/contrib/binutils/include/elf/common.h
index 92b8f4d..17ca0d5 100644
--- a/contrib/binutils/include/elf/common.h
+++ b/contrib/binutils/include/elf/common.h
@@ -388,8 +388,10 @@
 #define NT_PRPSINFO	3		/* Contains copy of prpsinfo struct */
 #define NT_TASKSTRUCT	4		/* Contains copy of task struct */
 #define NT_AUXV		6		/* Contains copy of Elfxx_auxv_t */
+#define NT_FILE		0x46494c45
 #define NT_PRXFPREG	0x46e62b7f	/* Contains a user_xfpregs_struct; */
 					/*   note name must be "LINUX".  */
+#define NT_SIGINFO	0x53494749
 
 /* Note segments for core files on dir-style procfs systems.  */
 
@@ -435,6 +437,9 @@
 #define GNU_ABI_TAG_FREEBSD	3
 #define GNU_ABI_TAG_NETBSD	4
 
+/* Values for GNU .note.gnu.build-id notes.  Note name is "GNU"." */
+#define NT_GNU_BUILD_ID		3
+
 /* Values for NetBSD .note.netbsd.ident notes.  Note name is "NetBSD".  */
 
 #define NT_NETBSD_IDENT		1