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authorMasami Hiramatsu <mhiramat@redhat.com>2009-09-10 19:53:06 -0400
committerFrederic Weisbecker <fweisbec@gmail.com>2009-09-11 04:14:24 +0200
commitad5cafcdb09c57008c990edd309c0a563b09f238 (patch)
treeb480394929f0d235510a44383a4ef5c856d6aa3d /arch/x86/kernel/ptrace.c
parenta00e817f42663941ea0aa5f85a9d1c4f8b212839 (diff)
downloadlinux-ad5cafcdb09c57008c990edd309c0a563b09f238.tar.bz2
x86/ptrace: Fix regs_get_argument_nth() to add correct offset
Fix regs_get_argument_nth() to add correct offset bytes. Because offset_of() returns offset in byte, the offset should be added to char * instead of unsigned long *. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Frank Ch. Eigler <fche@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jason Baron <jbaron@redhat.com> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <20090910235306.22412.31613.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'arch/x86/kernel/ptrace.c')
-rw-r--r--arch/x86/kernel/ptrace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index a33a17d5d5c8..caffb6809452 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -150,7 +150,7 @@ static const int arg_offs_table[] = {
unsigned long regs_get_argument_nth(struct pt_regs *regs, unsigned int n)
{
if (n < ARRAY_SIZE(arg_offs_table))
- return *((unsigned long *)regs + arg_offs_table[n]);
+ return *(unsigned long *)((char *)regs + arg_offs_table[n]);
else {
/*
* The typical case: arg n is on the stack.