[PATCH] uml: x86_64 ptrace fixes
This patch fixes some missing ptrace bits on x86_64. PTRACE_ARCH_PRCTL is
hooked up and implemented. This required generalizing arch_prctl_skas
slightly to take a task_struct to modify. Previously, it always operated on
current.
Reading and writing the debug registers is also enabled by un-ifdefing the
code that implements that. It turns out that x86_64 is identical to i386, so
the same code can be used.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 9a77fb3..627742d 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -18,6 +18,7 @@
#include "kern_util.h"
#include "skas_ptrace.h"
#include "sysdep/ptrace.h"
+#include "os.h"
static inline void set_singlestepping(struct task_struct *child, int on)
{
@@ -241,6 +242,12 @@
break;
}
#endif
+#ifdef PTRACE_ARCH_PRCTL
+ case PTRACE_ARCH_PRCTL:
+ /* XXX Calls ptrace on the host - needs some SMP thinking */
+ ret = arch_prctl_skas(child, data, (void *) addr);
+ break;
+#endif
default:
ret = ptrace_request(child, request, addr, data);
break;