tree 6816e82f1a59fe3d4fbf8c291d3f52598531c50c
parent d8005e6b95268cbb50db3773d5f180c32a9434fe
author Vineet Gupta <vgupta@synopsys.com> 1358502139 +0530
committer Vineet Gupta <vgupta@synopsys.com> 1360949610 +0530

ARC: Signal handling

Includes following fixes courtesy review by Al-Viro

* Tracer poke to Callee-regs were lost

  Before going off into do_signal( ) we save the user-mode callee regs
  (as they are not saved by default as part of pt_regs). This is to make
  sure that that a Tracer (if tracing related signal) is able to do likes
  of PEEKUSR(callee-reg).

  However in return path we were simply discarding the user-mode callee
  regs, which would break a POKEUSR(callee-reg) from a tracer.

* Issue related to multiple syscall restarts are addressed in next patch

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Acked-by: Jonas Bonn <jonas@southpole.se>