[POWERPC] Add SPE registers to core dumps

This makes the SPE register data appear in ELF core dumps, using the
new n_type value NT_PPC_SPE (0x101).  This new note type is not used
by any consumers of core files yet, but support can be added.  I don't
even have any hardware with SPE capabilities, so I've never seen such
a note.  But this demonstrates how simple it is to export register
information in core dumps when the user_regset style is used for the
low-level code.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 2 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 7571c2e2d991..7673e9865733 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -581,7 +581,7 @@ static const struct user_regset compat_regsets[] = {
 #endif
 #ifdef CONFIG_SPE
         [REGSET_SPE] = {
-                .n = 35,
+                .core_note_type = NT_PPC_SPE, .n = 35,
                 .size = sizeof(u32), .align = sizeof(u32),
                 .active = evr_active, .get = evr_get, .set = evr_set
         },
diff --git a/include/linux/elf.h b/include/linux/elf.h
index 7ceb24d87c1a..30eb6fbd5323 100644
--- a/include/linux/elf.h
+++ b/include/linux/elf.h
@@ -355,6 +355,7 @@ typedef struct elf64_shdr {
 #define NT_AUXV         6
 #define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
 #define NT_PPC_VMX      0x100           /* PowerPC Altivec/VMX registers */
+#define NT_PPC_SPE      0x101           /* PowerPC SPE/EVR registers */
 #define NT_386_TLS      0x200           /* i386 TLS slots (struct user_desc) */