From: Ben Gras <ben@minix3.org>
Date: Tue, 5 Feb 2013 16:17:19 +0000 (+0100)
Subject: arm: protect state after signal handler
X-Git-Tag: v3.2.1~27
X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=3045d2870b0b35f1ded037b4ef79bcfcd7ae5e43;p=minix.git

arm: protect state after signal handler

	. set MF_CONTEXT_SET after signal handler state
	  is set so it doesn't get clobbered by the kernel
	  afterwards (i.e. by delivermsg()).

fixes at least test41.

Change-Id: I7e5e0e9311c8bbc1c0a9c7ca466ceddd9edfa03f
---

diff --git a/kernel/system/do_sigsend.c b/kernel/system/do_sigsend.c
index eeb13f6c7..6c6e9babe 100644
--- a/kernel/system/do_sigsend.c
+++ b/kernel/system/do_sigsend.c
@@ -92,6 +92,7 @@ int do_sigsend(struct proc * caller, message * m_ptr)
   rp->p_reg.retreg = (reg_t) fr.sf_signo;
   rp->p_reg.r1 = (reg_t) fr.sf_code;
   rp->p_reg.r2 = (reg_t) fr.sf_scp;
+  rp->p_misc_flags |= MF_CONTEXT_SET;
 #endif
 
   /* Copy the sigframe structure to the user's stack. */