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authorAnton Kolesov <Anton.Kolesov@synopsys.com>2014-06-20 20:28:39 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-28 08:00:07 -0700
commita290f3552cc7b68398df8bbca5290bad0867827b (patch)
treedc3803d9275b9365ebcb398dc866321fd128c86f
parent4aba6e36347232a9e0cc2e9c8daf42a6bdcdad66 (diff)
ARC: Implement ptrace(PTRACE_GET_THREAD_AREA)
commit a4b6cb735b25aa84a462a1985e3e43bebaf5beb4 upstream. This patch adds implementation of GET_THREAD_AREA ptrace request type. This is required by GDB to debug NPTL applications. Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--arch/arc/include/uapi/asm/ptrace.h1
-rw-r--r--arch/arc/kernel/ptrace.c4
2 files changed, 5 insertions, 0 deletions
diff --git a/arch/arc/include/uapi/asm/ptrace.h b/arch/arc/include/uapi/asm/ptrace.h
index 30333cec0fef..ef9d79a3db25 100644
--- a/arch/arc/include/uapi/asm/ptrace.h
+++ b/arch/arc/include/uapi/asm/ptrace.h
@@ -11,6 +11,7 @@
#ifndef _UAPI__ASM_ARC_PTRACE_H
#define _UAPI__ASM_ARC_PTRACE_H
+#define PTRACE_GET_THREAD_AREA 25
#ifndef __ASSEMBLY__
/*
diff --git a/arch/arc/kernel/ptrace.c b/arch/arc/kernel/ptrace.c
index 0851604bb9cd..f8a36ed9e0d5 100644
--- a/arch/arc/kernel/ptrace.c
+++ b/arch/arc/kernel/ptrace.c
@@ -136,6 +136,10 @@ long arch_ptrace(struct task_struct *child, long request,
pr_debug("REQ=%ld: ADDR =0x%lx, DATA=0x%lx)\n", request, addr, data);
switch (request) {
+ case PTRACE_GET_THREAD_AREA:
+ ret = put_user(task_thread_info(child)->thr_ptr,
+ (unsigned long __user *)data);
+ break;
default:
ret = ptrace_request(child, request, addr, data);
break;