[PATCH 0/3] powerpc: VSX ptrace bug fixes for 2.6.27

[PATCH 0/3] powerpc: VSX ptrace bug fixes for 2.6.27

[Michael Neuling]

Below are a few bug fixes for VSX ptrace for 2.6.27.

Thanks to Luis Machado for helping find these with his VSX GDB work.

[PATCH 1/3] powerpc: correctly hookup PTRACE_GET/SETVSRREGS for 32 bit processes

[Michael Neuling]

Fix bug where PTRACE_GET/SETVSRREGS are not connected for 32 bit processes.

Signed-off-by: Michael Neuling <mikey@neuling.org>
---

 arch/powerpc/kernel/ptrace32.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-2.6-ozlabs/arch/powerpc/kernel/ptrace32.c
===================================================================
--- linux-2.6-ozlabs.orig/arch/powerpc/kernel/ptrace32.c
+++ linux-2.6-ozlabs/arch/powerpc/kernel/ptrace32.c
@@ -294,6 +294,8 @@ long compat_arch_ptrace(struct task_stru
 	case PTRACE_SETFPREGS:
 	case PTRACE_GETVRREGS:
 	case PTRACE_SETVRREGS:
+	case PTRACE_GETVSRREGS:
+	case PTRACE_SETVSRREGS:
 	case PTRACE_GETREGS64:
 	case PTRACE_SETREGS64:
 	case PPC_PTRACE_GETFPREGS:

[PATCH 3/3] powerpc: fix setting the wrong thread_struct for ptrace get/set VSX regs

[Michael Neuling]

In PTRACE_GET/SETVSRREGS, we should be using the thread we are
ptracing rather than current.  

Signed-off-by: Michael Neuling <mikey@neuling.org>
---

 arch/powerpc/kernel/ptrace.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6-ozlabs/arch/powerpc/kernel/ptrace.c
===================================================================
--- linux-2.6-ozlabs.orig/arch/powerpc/kernel/ptrace.c
+++ linux-2.6-ozlabs/arch/powerpc/kernel/ptrace.c
@@ -374,7 +374,7 @@ static int vsr_get(struct task_struct *t
 	flush_vsx_to_thread(target);
 
 	for (i = 0; i < 32 ; i++)
-		buf[i] = current->thread.fpr[i][TS_VSRLOWOFFSET];
+		buf[i] = target->thread.fpr[i][TS_VSRLOWOFFSET];
 	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
 				  buf, 0, 32 * sizeof(double));
 
@@ -393,7 +393,7 @@ static int vsr_set(struct task_struct *t
 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
 				 buf, 0, 32 * sizeof(double));
 	for (i = 0; i < 32 ; i++)
-		current->thread.fpr[i][TS_VSRLOWOFFSET] = buf[i];
+		target->thread.fpr[i][TS_VSRLOWOFFSET] = buf[i];
 
 
 	return ret;

[PATCH 2/3] powerpc: fix ptrace buffer size for VSX

[Michael Neuling]

Fix cut-and-paste error in the size setting for ptrace buffers for VSX.

Signed-off-by: Michael Neuling <mikey@neuling.org>
---

 arch/powerpc/kernel/ptrace.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Index: linux-2.6-ozlabs/arch/powerpc/kernel/ptrace.c
===================================================================
--- linux-2.6-ozlabs.orig/arch/powerpc/kernel/ptrace.c
+++ linux-2.6-ozlabs/arch/powerpc/kernel/ptrace.c
@@ -913,15 +913,13 @@ long arch_ptrace(struct task_struct *chi
 	case PTRACE_GETVSRREGS:
 		return copy_regset_to_user(child, &user_ppc_native_view,
 					   REGSET_VSX,
-					   0, (32 * sizeof(vector128) +
-					       sizeof(u32)),
+					   0, 32 * sizeof(double),
 					   (void __user *) data);
 
 	case PTRACE_SETVSRREGS:
 		return copy_regset_from_user(child, &user_ppc_native_view,
 					     REGSET_VSX,
-					     0, (32 * sizeof(vector128) +
-						 sizeof(u32)),
+					     0, 32 * sizeof(double),
 					     (const void __user *) data);
 #endif
 #ifdef CONFIG_SPE