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| author | Corinna Vinschen <corinna@vinschen.de> | 2015-12-03 22:56:44 +0100 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2015-12-03 22:56:44 +0100 |
| commit | 12743c2d5d2721f3a80b4d7671a349be03c1f520 (patch) | |
| tree | eef2fbd63e2fb09cb011b7463e14c056251c892e /winsup/cygwin/wow64.h | |
| parent | 8f4da28eb68d583840cfbca8896755c60d2c8d15 (diff) | |
| download | newlib-12743c2d5d2721f3a80b4d7671a349be03c1f520.zip newlib-12743c2d5d2721f3a80b4d7671a349be03c1f520.tar.gz newlib-12743c2d5d2721f3a80b4d7671a349be03c1f520.tar.bz2 | |
On 64 bit, only create new thread stack if started from 32 bit process on affected platforms
* dcrt0.cc (dll_crt0_0): On 64 bit, set wow64_needs_stack_adjustment
if not started from a 64 bit process.
(_dll_crt0): Enable wow64_needs_stack_adjustment branch on 64 bit
as well. Remove 64 bit only code. Introduce CREATE_STACK and
FIX_STACK macros to conditionalize the code. Rearrange and
partially rewrite comments.
* wincap.h (wincaps::has_3264_stack_broken): New element.
* wincap.cc: Implement above element throughout.
(wincapc::init): Set has_3264_stack_broken to false on 32 bit.
* wow64.cc: Enable functionality on 64 bit architecture, except for
wow64_revert_to_original_stack. Enhance comments to explain.
(wow64_eval_expected_main_stack): Make 64 bit clean.
(wow64_test_for_64bit_parent): Ditto.
* wow64.h: Export wow64_revert_to_original_stack on 32 bit only,
everything else on all architectures.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Diffstat (limited to 'winsup/cygwin/wow64.h')
| -rw-r--r-- | winsup/cygwin/wow64.h | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/winsup/cygwin/wow64.h b/winsup/cygwin/wow64.h index a0b5b31..150561c 100644 --- a/winsup/cygwin/wow64.h +++ b/winsup/cygwin/wow64.h @@ -1,6 +1,6 @@ /* wow64.h - Copyright 2011, 2012 Red Hat, Inc. + Copyright 2011, 2012, 2015 Red Hat, Inc. This file is part of Cygwin. @@ -8,14 +8,12 @@ This software is a copyrighted work licensed under the terms of the Cygwin license. Please consult the file "CYGWIN_LICENSE" for details. */ -#ifndef __x86_64__ -/* WOW64 only plays a role in the 32 bit version. Don't use any of this - in the 64 bit version. */ - extern bool NO_COPY wow64_needs_stack_adjustment; - extern bool wow64_test_for_64bit_parent (); -extern PVOID wow64_revert_to_original_stack (PVOID &allocationbase); extern void wow64_respawn_process () __attribute__ ((noreturn)); +#ifndef __x86_64__ + +extern PVOID wow64_revert_to_original_stack (PVOID &allocationbase); + #endif /* !__x86_64__ */ |