linux-kernel - [PATCH -mm 20/43] powerpc SPE core dump

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Date:	Thu, 20 Dec 2007 03:58:28 -0800 (PST)
From:	Roland McGrath <roland@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linuxppc-dev@...abs.org, Paul Mackerras <paulus@...ba.org>
Subject: [PATCH -mm 20/43] powerpc SPE core dump

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@...hat.com>
---
 arch/powerpc/kernel/ptrace.c |    2 +-
 include/linux/elf.h          |    1 +
 2 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index e961e10..0231e7d 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -642,7 +642,7 @@ 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 576e83b..ba268b2 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 */
 
 
 /* Note header in a PT_NOTE section */
-- 
1.5.3.6

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