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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 08:06:04 -0700
commit0163da2fc54be782c43476ebd68ced8a312e7e68 (patch)
tree2325703a7fe9210a25f2b9ba5e66e1b00477be9b
parent15c37d7780a8a807d778c57ca647beb2c8df4e71 (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 2618cc13ba75..76a7739aab1c 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 5d76706139dd..13b3ffb27a38 100644
--- a/arch/arc/kernel/ptrace.c
+++ b/arch/arc/kernel/ptrace.c
@@ -146,6 +146,10 @@ 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;