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From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
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From: Keith Seitz <keiths@redhat.com>
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Date: Tue, 19 Mar 2019 11:38:37 -0700
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Subject: gdb-rhbz1669953-aarch64-sve-binutils.patch
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;; Fix 'gdb fails to read zN registers from corefile with aarch64 SVE'
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;; Alan Hayward, RH BZ 1669953
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Add checks for the NT_ARM_SVE section in a core file.
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The NT_ARM_SVE section is documented here:
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https://github.com/torvalds/linux/blob/master/Documentation/arm64/sve.txt
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* A NT_ARM_SVE note will be added to each coredump for each thread of the
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dumped process. The contents will be equivalent to the data that would have
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been read if a PTRACE_GETREGSET of NT_ARM_SVE were executed for each thread
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when the coredump was generated.
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* elf.c (elfcore_grok_aarch_sve): New function.
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(elfcore_grok_note): Check for Aarch64 SVE.
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(elfcore_write_aarch_sve): New function.
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(elfcore_write_register_note): Check for Aarch64 SVE.
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* elf-bfd.h(elfcore_grok_aarch_sve): New declaration.
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diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h
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--- a/bfd/elf-bfd.h
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+++ b/bfd/elf-bfd.h
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@@ -2601,6 +2601,8 @@ extern char *elfcore_write_aarch_hw_break
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(bfd *, char *, int *, const void *, int);
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extern char *elfcore_write_aarch_hw_watch
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(bfd *, char *, int *, const void *, int);
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+extern char *elfcore_write_aarch_sve
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+ (bfd *, char *, int *, const void *, int);
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extern char *elfcore_write_lwpstatus
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(bfd *, char *, int *, long, int, const void *);
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extern char *elfcore_write_register_note
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diff --git a/bfd/elf.c b/bfd/elf.c
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--- a/bfd/elf.c
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+++ b/bfd/elf.c
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@@ -9340,6 +9340,12 @@ elfcore_grok_aarch_hw_watch (bfd *abfd, Elf_Internal_Note *note)
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return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-watch", note);
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}
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+static bfd_boolean
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+elfcore_grok_aarch_sve (bfd *abfd, Elf_Internal_Note *note)
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+{
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+ return elfcore_make_note_pseudosection (abfd, ".reg-aarch-sve", note);
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+}
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+
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#if defined (HAVE_PRPSINFO_T)
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typedef prpsinfo_t elfcore_psinfo_t;
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#if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
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@@ -9836,6 +9842,13 @@ elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
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else
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return TRUE;
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+ case NT_ARM_SVE:
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+ if (note->namesz == 6
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+ && strcmp (note->namedata, "LINUX") == 0)
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+ return elfcore_grok_aarch_sve (abfd, note);
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+ else
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+ return TRUE;
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+
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case NT_PRPSINFO:
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case NT_PSINFO:
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if (bed->elf_backend_grok_psinfo)
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@@ -11027,6 +11040,18 @@ elfcore_write_aarch_hw_watch (bfd *abfd,
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note_name, NT_ARM_HW_WATCH, aarch_hw_watch, size);
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}
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+char *
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+elfcore_write_aarch_sve (bfd *abfd,
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+ char *buf,
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+ int *bufsiz,
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+ const void *aarch_sve,
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+ int size)
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+{
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+ char *note_name = "LINUX";
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+ return elfcore_write_note (abfd, buf, bufsiz,
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+ note_name, NT_ARM_SVE, aarch_sve, size);
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+}
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+
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char *
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elfcore_write_register_note (bfd *abfd,
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char *buf,
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@@ -11079,6 +11104,8 @@ elfcore_write_register_note (bfd *abfd,
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return elfcore_write_aarch_hw_break (abfd, buf, bufsiz, data, size);
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if (strcmp (section, ".reg-aarch-hw-watch") == 0)
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return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);
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+ if (strcmp (section, ".reg-aarch-sve") == 0)
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+ return elfcore_write_aarch_sve (abfd, buf, bufsiz, data, size);
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return NULL;
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}
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