Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1f7d6668c29b1dfa307a44844f9bb38356fc989b
Commit: 1f7d6668c29b1dfa307a44844f9bb38356fc989b
Parent: 5b20cd80b4ce1674b7abe5ac91db23346118176d
Author: Mark Nelson <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 16 23:25:40 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed Oct 17 08:42:44 2007 -0700
powerpc: add Altivec/VMX state to coredumps
Update dump_task_altivec() (which has so far never been put to use) so that
it dumps the Altivec/VMX registers (VR[0] - VR[31], VSCR and VRSAVE) in the
same format as the ptrace get_vrregs(), and add the appropriate glue
typedef and #defines to make it work.
A new note type of NT_PPC_VMX was chosen to be 0x100 (arbitrarily) because
it allows the low range values to be used for more generic purposes and
0x100 seems an adequate starting point for PowerPC extensions.
Signed-off-by: Mark Nelson <[EMAIL PROTECTED]>
Signed-off-by: Paul Mackerras <[EMAIL PROTECTED]>
Cc: Thomas Gleixner <[EMAIL PROTECTED]>
Cc: Ingo Molnar <[EMAIL PROTECTED]>
Cc: Andi Kleen <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/powerpc/kernel/process.c | 28 +++++++++++++++++++++++++---
include/asm-powerpc/elf.h | 8 ++++++++
include/linux/elf.h | 1 +
3 files changed, 34 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 7949c20..ea6ad7a 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -149,10 +149,32 @@ void flush_altivec_to_thread(struct task_struct *tsk)
}
}
-int dump_task_altivec(struct pt_regs *regs, elf_vrregset_t *vrregs)
+int dump_task_altivec(struct task_struct *tsk, elf_vrregset_t *vrregs)
{
- flush_altivec_to_thread(current);
- memcpy(vrregs, ¤t->thread.vr[0], sizeof(*vrregs));
+ /* ELF_NVRREG includes the VSCR and VRSAVE which we need to save
+ * separately, see below */
+ const int nregs = ELF_NVRREG - 2;
+ elf_vrreg_t *reg;
+ u32 *dest;
+
+ if (tsk == current)
+ flush_altivec_to_thread(tsk);
+
+ reg = (elf_vrreg_t *)vrregs;
+
+ /* copy the 32 vr registers */
+ memcpy(reg, &tsk->thread.vr[0], nregs * sizeof(*reg));
+ reg += nregs;
+
+ /* copy the vscr */
+ memcpy(reg, &tsk->thread.vscr, sizeof(*reg));
+ reg++;
+
+ /* vrsave is stored in the high 32bit slot of the final 128bits */
+ memset(reg, 0, sizeof(*reg));
+ dest = (u32 *)reg;
+ *dest = tsk->thread.vrsave;
+
return 1;
}
#endif /* CONFIG_ALTIVEC */
diff --git a/include/asm-powerpc/elf.h b/include/asm-powerpc/elf.h
index e42820d..5b9e3f4 100644
--- a/include/asm-powerpc/elf.h
+++ b/include/asm-powerpc/elf.h
@@ -212,6 +212,14 @@ static inline int dump_task_regs(struct task_struct *tsk,
extern int dump_task_fpu(struct task_struct *, elf_fpregset_t *);
#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
+typedef elf_vrregset_t elf_fpxregset_t;
+
+#ifdef CONFIG_ALTIVEC
+extern int dump_task_altivec(struct task_struct *, elf_vrregset_t *vrregs);
+#define ELF_CORE_COPY_XFPREGS(tsk, regs) dump_task_altivec(tsk, regs)
+#define ELF_CORE_XFPREG_TYPE NT_PPC_VMX
+#endif
+
#endif /* __KERNEL__ */
/* ELF_HWCAP yields a mask that user programs can use to figure out what
diff --git a/include/linux/elf.h b/include/linux/elf.h
index d2da84a..0eb9ed2 100644
--- a/include/linux/elf.h
+++ b/include/linux/elf.h
@@ -355,6 +355,7 @@ typedef struct elf64_shdr {
#define NT_TASKSTRUCT 4
#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 */
/* Note header in a PT_NOTE section */
-
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