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* miscfuncs.cc (thread_wrapper): Make sure stack is 16 byte aligned

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to make gcc-3 compiled pthread applications happy.
This commit is contained in:
Corinna Vinschen 2012-01-09 14:19:56 +00:00
parent df8c8e18eb
commit cde9b54e71
2 changed files with 10 additions and 1 deletions
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5
winsup/cygwin/ChangeLog
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@ -1,3 +1,8 @@
2012-01-09 Corinna Vinschen <corinna@vinschen.de>
* miscfuncs.cc (thread_wrapper): Make sure stack is 16 byte aligned
to make gcc-3 compiled pthread applications happy.
2012-01-08 Christopher Faylor <me.cygwin2011@cgf.cx> 2012-01-08 Christopher Faylor <me.cygwin2011@cgf.cx>
* dtable.cc (dtable::stdio_init): Always initialize console when we * dtable.cc (dtable::stdio_init): Always initialize console when we

6
winsup/cygwin/miscfuncs.cc
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@ -1,7 +1,7 @@
/* miscfuncs.cc: misc funcs that don't belong anywhere else /* miscfuncs.cc: misc funcs that don't belong anywhere else
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 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. This file is part of Cygwin.
@ -525,6 +525,10 @@ thread_wrapper (VOID *arg)
subl $4, %%ebx # Subtract another 4 bytes \n\ subl $4, %%ebx # Subtract another 4 bytes \n\
movl %%ebx, %%esp # Set esp \n\ movl %%ebx, %%esp # Set esp \n\
xorl %%ebp, %%ebp # Set ebp to 0 \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\ # Now we moved to the new stack. Save thread func address\n\
# and thread arg on new stack \n\ # and thread arg on new stack \n\
pushl %%ecx # Push thread arg onto stack \n\ pushl %%ecx # Push thread arg onto stack \n\