S390: Support new vector register sections

The IBM z13 has new 128-bit wide vector registers v0-v31, where v0-v15
include the existing 64-bit wide floating point registers.  The Linux
kernel presents the vector registers as two additional register sets,
one for the right halves of v0-v15 and another one for the full
registers v16-v31.  Thus a new core file may contain two new register
note sections, and this patch adds support to binutils for them.

bfd/
	* elf-bfd.h (elfcore_write_s390_vxrs_low): Add prototype.
	(elfcore_write_s390_vxrs_high): Likewise.
	* elf.c (elfcore_grok_s390_vxrs_low): New function.
	(elfcore_grok_s390_vxrs_high): New function.
	(elfcore_grok_note): Call them.
	(elfcore_write_s390_vxrs_low): New function.
	(elfcore_write_s390_vxrs_high): New function.
	(elfcore_write_register_note): Call them.

binutils/
	* readelf.c (get_note_type): Add NT_S390_VXRS_LOW and
	NT_S390_VXRS_HIGH.

include/elf/
	* common.h (NT_S390_VXRS_LOW): New macro.
	(NT_S390_VXRS_HIGH): Likewise.

3 files changed, 70 insertions, 0 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index f6d2513..8d8ec22 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,14 @@
+2015-02-20  Andreas Arnez  <arnez@linux.vnet.ibm.com>
+
+	* elf-bfd.h (elfcore_write_s390_vxrs_low): Add prototype.
+	(elfcore_write_s390_vxrs_high): Likewise.
+	* elf.c (elfcore_grok_s390_vxrs_low): New function.
+	(elfcore_grok_s390_vxrs_high): New function.
+	(elfcore_grok_note): Call them.
+	(elfcore_write_s390_vxrs_low): New function.
+	(elfcore_write_s390_vxrs_high): New function.
+	(elfcore_write_register_note): Call them.
+
 2015-02-19  Branko Drevensek  <branko.drevensek@gmail.com>
 
 	PR 17995
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h
index 495053d..156eec7 100644
--- a/bfd/elf-bfd.h
+++ b/bfd/elf-bfd.h
@@ -2285,6 +2285,10 @@ extern char *elfcore_write_s390_system_call
   (bfd *, char *, int *, const void *, int);
 extern char *elfcore_write_s390_tdb
   (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_s390_vxrs_low
+  (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_s390_vxrs_high
+  (bfd *, char *, int *, const void *, int);
 extern char *elfcore_write_arm_vfp
   (bfd *, char *, int *, const void *, int);
 extern char *elfcore_write_aarch_tls
diff --git a/bfd/elf.c b/bfd/elf.c
index 0aa5f8e..14bc531 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -8251,6 +8251,18 @@ elfcore_grok_s390_tdb (bfd *abfd, Elf_Internal_Note *note)
 }
 
 static bfd_boolean
+elfcore_grok_s390_vxrs_low (bfd *abfd, Elf_Internal_Note *note)
+{
+  return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-low", note);
+}
+
+static bfd_boolean
+elfcore_grok_s390_vxrs_high (bfd *abfd, Elf_Internal_Note *note)
+{
+  return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-high", note);
+}
+
+static bfd_boolean
 elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note)
 {
   return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note);
@@ -8714,6 +8726,20 @@ elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
       else
         return TRUE;
 
+    case NT_S390_VXRS_LOW:
+      if (note->namesz == 6
+	  && strcmp (note->namedata, "LINUX") == 0)
+	return elfcore_grok_s390_vxrs_low (abfd, note);
+      else
+	return TRUE;
+
+    case NT_S390_VXRS_HIGH:
+      if (note->namesz == 6
+	  && strcmp (note->namedata, "LINUX") == 0)
+	return elfcore_grok_s390_vxrs_high (abfd, note);
+      else
+	return TRUE;
+
     case NT_ARM_VFP:
       if (note->namesz == 6
 	  && strcmp (note->namedata, "LINUX") == 0)
@@ -9580,6 +9606,31 @@ elfcore_write_s390_tdb (bfd *abfd,
 }
 
 char *
+elfcore_write_s390_vxrs_low (bfd *abfd,
+			     char *buf,
+			     int *bufsiz,
+			     const void *s390_vxrs_low,
+			     int size)
+{
+  char *note_name = "LINUX";
+  return elfcore_write_note (abfd, buf, bufsiz,
+			     note_name, NT_S390_VXRS_LOW, s390_vxrs_low, size);
+}
+
+char *
+elfcore_write_s390_vxrs_high (bfd *abfd,
+			     char *buf,
+			     int *bufsiz,
+			     const void *s390_vxrs_high,
+			     int size)
+{
+  char *note_name = "LINUX";
+  return elfcore_write_note (abfd, buf, bufsiz,
+			     note_name, NT_S390_VXRS_HIGH,
+			     s390_vxrs_high, size);
+}
+
+char *
 elfcore_write_arm_vfp (bfd *abfd,
 		       char *buf,
 		       int *bufsiz,
@@ -9663,6 +9714,10 @@ elfcore_write_register_note (bfd *abfd,
     return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size);
   if (strcmp (section, ".reg-s390-tdb") == 0)
     return elfcore_write_s390_tdb (abfd, buf, bufsiz, data, size);
+  if (strcmp (section, ".reg-s390-vxrs-low") == 0)
+    return elfcore_write_s390_vxrs_low (abfd, buf, bufsiz, data, size);
+  if (strcmp (section, ".reg-s390-vxrs-high") == 0)
+    return elfcore_write_s390_vxrs_high (abfd, buf, bufsiz, data, size);
   if (strcmp (section, ".reg-arm-vfp") == 0)
     return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size);
   if (strcmp (section, ".reg-aarch-tls") == 0)