From: Hans-Peter Nilsson <hp@axis.com>
Date: Wed, 6 Oct 2010 23:44:33 +0000 (+0000)
Subject: 	* traps.c (cris_break_13_handler): Pass lseek
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7cf1d8af2f630bd1959cb16a6ddc50650239d0de;p=binutils-gdb.git

	* traps.c (cris_break_13_handler): Pass lseek
	offset parameter as sign-extended.
---

diff --git a/sim/cris/ChangeLog b/sim/cris/ChangeLog
index 699e9e8fac9..2963b90dcc5 100644
--- a/sim/cris/ChangeLog
+++ b/sim/cris/ChangeLog
@@ -1,3 +1,8 @@
+2010-10-07  Hans-Peter Nilsson  <hp@axis.com>
+
+	* traps.c (cris_break_13_handler): Pass lseek
+	offset parameter as sign-extended.
+
 2010-05-26  Ozkan Sezer  <sezeroz@gmail.com>
 
 	* dv-rv.c (hw_rv_init_socket): Check error return from socket() call
diff --git a/sim/cris/traps.c b/sim/cris/traps.c
index dfaaeeda82a..1e17ce3be6b 100644
--- a/sim/cris/traps.c
+++ b/sim/cris/traps.c
@@ -1478,6 +1478,14 @@ cris_break_13_handler (SIM_CPU *current_cpu, USI callnum, USI arg1,
   s.arg2 = arg2;
   s.arg3 = arg3;
 
+  /* The type of s.arg2 is long, so for hosts with 64-bit longs, we need
+     to sign-extend the lseek offset to be passed as a signed number,
+     else we'll truncate it to something > 2GB on hosts where sizeof
+     long > sizeof USI.  We avoid doing it for all syscalls, as arg2 is
+     e.g. an address for some syscalls.  */
+  if (callnum == TARGET_SYS_lseek)
+    s.arg2 = (SI) arg2;
+
   if (callnum == TARGET_SYS_exit_group
       || (callnum == TARGET_SYS_exit && current_cpu->m1threads == 0))
     {