From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Keith Seitz <keiths@redhat.com>

Date: Tue, 19 Mar 2019 11:38:37 -0700

Subject: gdb-rhbz1669953-aarch64-sve-binutils.patch

;; Fix 'gdb fails to read zN registers from corefile with aarch64 SVE'

;; Alan Hayward, RH BZ 1669953

Add checks for the NT_ARM_SVE section in a core file.

The NT_ARM_SVE section is documented here:

  https://github.com/torvalds/linux/blob/master/Documentation/arm64/sve.txt

  * A NT_ARM_SVE note will be added to each coredump for each thread of the

   dumped process.  The contents will be equivalent to the data that would have

   been read if a PTRACE_GETREGSET of NT_ARM_SVE were executed for each thread

   when the coredump was generated.

        * elf.c (elfcore_grok_aarch_sve): New function.

        (elfcore_grok_note): Check for Aarch64 SVE.

        (elfcore_write_aarch_sve): New function.

        (elfcore_write_register_note): Check for Aarch64 SVE.

        * elf-bfd.h(elfcore_grok_aarch_sve): New declaration.

diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h

--- a/bfd/elf-bfd.h

+++ b/bfd/elf-bfd.h

@@ -2601,6 +2601,8 @@ extern char *elfcore_write_aarch_hw_break

   (bfd *, char *, int *, const void *, int);

 extern char *elfcore_write_aarch_hw_watch

   (bfd *, char *, int *, const void *, int);

+extern char *elfcore_write_aarch_sve

+  (bfd *, char *, int *, const void *, int);

 extern char *elfcore_write_lwpstatus

   (bfd *, char *, int *, long, int, const void *);

 extern char *elfcore_write_register_note

diff --git a/bfd/elf.c b/bfd/elf.c

--- a/bfd/elf.c

+++ b/bfd/elf.c

@@ -9340,6 +9340,12 @@ elfcore_grok_aarch_hw_watch (bfd *abfd, Elf_Internal_Note *note)

   return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-watch", note);

 }

+static bfd_boolean

+elfcore_grok_aarch_sve (bfd *abfd, Elf_Internal_Note *note)

+{

+  return elfcore_make_note_pseudosection (abfd, ".reg-aarch-sve", note);

+}

+

 #if defined (HAVE_PRPSINFO_T)

 typedef prpsinfo_t   elfcore_psinfo_t;

 #if defined (HAVE_PRPSINFO32_T)		/* Sparc64 cross Sparc32 */

@@ -9836,6 +9842,13 @@ elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)

       else

 	return TRUE;

+    case NT_ARM_SVE:

+      if (note->namesz == 6

+	  && strcmp (note->namedata, "LINUX") == 0)

+	return elfcore_grok_aarch_sve (abfd, note);

+      else

+	return TRUE;

+

     case NT_PRPSINFO:

     case NT_PSINFO:

       if (bed->elf_backend_grok_psinfo)

@@ -11027,6 +11040,18 @@ elfcore_write_aarch_hw_watch (bfd *abfd,

 			     note_name, NT_ARM_HW_WATCH, aarch_hw_watch, size);

 }

+char *

+elfcore_write_aarch_sve (bfd *abfd,

+			 char *buf,

+			 int *bufsiz,

+			 const void *aarch_sve,

+			 int size)

+{

+  char *note_name = "LINUX";

+  return elfcore_write_note (abfd, buf, bufsiz,

+			     note_name, NT_ARM_SVE, aarch_sve, size);

+}

+

 char *

 elfcore_write_register_note (bfd *abfd,

 			     char *buf,

@@ -11079,6 +11104,8 @@ elfcore_write_register_note (bfd *abfd,

     return elfcore_write_aarch_hw_break (abfd, buf, bufsiz, data, size);

   if (strcmp (section, ".reg-aarch-hw-watch") == 0)

     return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);

+  if (strcmp (section, ".reg-aarch-sve") == 0)

+    return elfcore_write_aarch_sve (abfd, buf, bufsiz, data, size);

   return NULL;

 }