From: Ben Gras <ben@minix3.org>
Date: Mon, 4 Feb 2013 03:08:12 +0000 (+0100)
Subject: kernel, libc: signals fixes
X-Git-Tag: v3.2.1~29
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=57bab02d57bc982e6b07d715ae6d1a753343a021;p=minix.git

kernel, libc: signals fixes

	. kernel: signal handler args for ARM
	. kernel: sanity check return address (LSB indicates thumb mode)
	. libc: properly retrieve signal mask for ARM

together fix test37 on ARM.

Change-Id: I4e00f754c50104ed85c7fdf8ec5ad54568f20a81
---

diff --git a/kernel/system/do_sigsend.c b/kernel/system/do_sigsend.c
index ddb8db93c..eeb13f6c7 100644
--- a/kernel/system/do_sigsend.c
+++ b/kernel/system/do_sigsend.c
@@ -86,6 +86,12 @@ int do_sigsend(struct proc * caller, message * m_ptr)
    * handler
    */
   rp->p_reg.lr = (reg_t) fr.sf_retadr;
+  if(rp->p_reg.lr & 1) { printf("sigsend: LSB LR makes no sense.\n"); }
+
+  /* pass signal handler parameters in registers */
+  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;
 #endif
 
   /* Copy the sigframe structure to the user's stack. */
diff --git a/lib/libc/arch/arm/gen/setjmp.S b/lib/libc/arch/arm/gen/setjmp.S
index 3f3750c9c..56b8202e0 100644
--- a/lib/libc/arch/arm/gen/setjmp.S
+++ b/lib/libc/arch/arm/gen/setjmp.S
@@ -87,7 +87,11 @@ ENTRY(__longjmp14)
 	stmfd	sp!, {r0-r2, r14}
 	mov	r2, #0x00000000
 	add	r1, r0, #(_JB_SIGMASK * 4)
+#ifdef __minix
+	mov	r0, #2				/* SIG_SETMASK */
+#else
 	mov	r0, #3				/* SIG_SETMASK */
+#endif
 	bl	PIC_SYM(_C_LABEL(__sigprocmask14), PLT)
 	ldmfd	sp!, {r0-r2, r14}