From: Will Deacon <will.deacon@arm.com>
Date: Thu, 19 Jul 2012 16:49:22 +0000 (+0100)
Subject: ARM: 7475/1: sys_trace: allow all syscall arguments to be updated via ptrace
X-Git-Tag: v3.6-rc1~14^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c7aa00db074e4961b49277d7d0fc2f5367d914ca;p=pandora-kernel.git

ARM: 7475/1: sys_trace: allow all syscall arguments to be updated via ptrace

Prior to syscall invocation, __sys_trace only reloads r0-r3 from the
kernel stack, preventing the debugger from updating arguments 5-7 when
signalled via ptrace.

This patch updates the code to reload r0-r6, updating arguments 5 and 6
on the stack (argument 7 is only used by OABI indirect syscalls and
can remain in a register).

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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