From cde9b54e7192bae4dce903c8d39129d31c703cd9 Mon Sep 17 00:00:00 2001 From: Corinna Vinschen Date: Mon, 9 Jan 2012 14:19:56 +0000 Subject: [PATCH] * miscfuncs.cc (thread_wrapper): Make sure stack is 16 byte aligned to make gcc-3 compiled pthread applications happy. --- winsup/cygwin/ChangeLog | 5 +++++ winsup/cygwin/miscfuncs.cc | 6 +++++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog index 9948fec09..ee9e6723b 100644 --- a/winsup/cygwin/ChangeLog +++ b/winsup/cygwin/ChangeLog @@ -1,3 +1,8 @@ +2012-01-09 Corinna Vinschen + + * miscfuncs.cc (thread_wrapper): Make sure stack is 16 byte aligned + to make gcc-3 compiled pthread applications happy. + 2012-01-08 Christopher Faylor * dtable.cc (dtable::stdio_init): Always initialize console when we diff --git a/winsup/cygwin/miscfuncs.cc b/winsup/cygwin/miscfuncs.cc index 9aae6aa8b..c6e37942d 100644 --- a/winsup/cygwin/miscfuncs.cc +++ b/winsup/cygwin/miscfuncs.cc @@ -1,7 +1,7 @@ /* miscfuncs.cc: misc funcs that don't belong anywhere else Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, - 2005, 2006, 2007, 2008, 2009, 2010, 2011 Red Hat, Inc. + 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Red Hat, Inc. This file is part of Cygwin. @@ -525,6 +525,10 @@ thread_wrapper (VOID *arg) subl $4, %%ebx # Subtract another 4 bytes \n\ movl %%ebx, %%esp # Set esp \n\ xorl %%ebp, %%ebp # Set ebp to 0 \n\ + # Make gcc 3.x happy and align the stack so that it is \n\ + # 16 byte aligned right before the final call opcode. \n\ + andl $-16, %%esp # 16 bit align \n\ + addl $-12, %%esp # 12 bytes + 4 byte arg = 16 \n\ # Now we moved to the new stack. Save thread func address\n\ # and thread arg on new stack \n\ pushl %%ecx # Push thread arg onto stack \n\