From d38f995aeec761879865ea2ab30128da4c5cdaf8 Mon Sep 17 00:00:00 2001
From: Steve Reinhardt <stever@eecs.umich.edu>
Date: Tue, 10 Feb 2004 21:43:57 -0800
Subject: Fixes for Linux syscall emulation.

arch/alpha/alpha_linux_process.cc:
    Fixes for Linux emulation:
    - stat struct alignment
    - osf_{get,set}sysinfo return values
    - additional syscall numbers
    - initialize $r0 to 0
sim/syscall_emul.cc:
    brk(0) just returns brk value (don't update it!)

--HG--
extra : convert_revision : 78e22458321c81e81540d101c9e65e2e4b0ad117
---
 sim/syscall_emul.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'sim')

diff --git a/sim/syscall_emul.cc b/sim/syscall_emul.cc
index e953a7308..57ae39cf8 100644
--- a/sim/syscall_emul.cc
+++ b/sim/syscall_emul.cc
@@ -104,7 +104,9 @@ int
 obreakFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
 {
     // change brk addr to first arg
-    p->brk_point = xc->getSyscallArg(0);
+    Addr new_brk = xc->getSyscallArg(0);
+    if (new_brk != 0)
+        p->brk_point = xc->getSyscallArg(0);
     return p->brk_point;
 }
 
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