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newlib-cygwin/winsup/cygwin/wow64.h

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* Makefile.in (DLL_OFILES): Add wow64.o. * dcrt0.cc (CYGWIN_GUARD): Drop execute permission for stack, it's not used for stacks by the OS either. (child_info_fork::alloc_stack_hard_way): Ditto. (child_info_fork::alloc_stack): Don't alloc_stack_hard_way under WOW64 if forked from a 64 bit parent. Set child's StackBase to parent's StackBase. Add comments to explain why. (wow64_respawn): Move to wow64.cc. (wow64_started_from_native64): Move to wow64.cc. (respawn_wow64_process): Move to wow64.cc. (dll_crt0_0): Drop wow64_test_stack_marker and move stack test into wow64_test_for_64bit_parent function. Don't return early if WOW64 process has been started from native 64 bit process. (_dll_crt0): Implement moving stack for WOW64 processes started from native 64 bit process. * wow64.cc: New file. (wow64_has_64bit_parent): Rename from wow64_respawn. (wow64_test_for_64bit_parent): Rename from wow64_started_from_native64. Change comment. (wow64_revert_to_original_stack): New function. (wow64_respawn_process): Rename from respawn_wow64_process for symmetry. * wow64.h: New file.
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/* wow64.h
* Merge in cygwin-64bit-branch.
2013-04-23 17:44:36 +08:00
Copyright 2011, 2012 Red Hat, Inc.
* Makefile.in (DLL_OFILES): Add wow64.o. * dcrt0.cc (CYGWIN_GUARD): Drop execute permission for stack, it's not used for stacks by the OS either. (child_info_fork::alloc_stack_hard_way): Ditto. (child_info_fork::alloc_stack): Don't alloc_stack_hard_way under WOW64 if forked from a 64 bit parent. Set child's StackBase to parent's StackBase. Add comments to explain why. (wow64_respawn): Move to wow64.cc. (wow64_started_from_native64): Move to wow64.cc. (respawn_wow64_process): Move to wow64.cc. (dll_crt0_0): Drop wow64_test_stack_marker and move stack test into wow64_test_for_64bit_parent function. Don't return early if WOW64 process has been started from native 64 bit process. (_dll_crt0): Implement moving stack for WOW64 processes started from native 64 bit process. * wow64.cc: New file. (wow64_has_64bit_parent): Rename from wow64_respawn. (wow64_test_for_64bit_parent): Rename from wow64_started_from_native64. Change comment. (wow64_revert_to_original_stack): New function. (wow64_respawn_process): Rename from respawn_wow64_process for symmetry. * wow64.h: New file.
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This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
* Merge in cygwin-64bit-branch.
2013-04-23 17:44:36 +08:00
#ifndef __x86_64__
/* WOW64 only plays a role in the 32 bit version. Don't use any of this
in the 64 bit version. */
* dcrt0.cc (dll_crt0_0): Check for wincap.wow64_has_secondary_stack rather than for wincap.is_wow64. Accommodate name change from wow64_has_64bit_parent to wow64_needs_stack_adjustment. Align comment. (_dll_crt0): Ditto. * wincap.h (wincaps::wow64_has_secondary_stack): New element. * wincap.cc: Implement above element throughout. (wincapc::init): Set wow64_has_secondary_stack to false on non-64 bit systems. * wow64.cc (wow64_needs_stack_adjustment): Rename (hopefully the last time) from wow64_has_64bit_parent. (wow64_eval_expected_main_stack): Fix comment to reflect real life. (wow64_test_for_64bit_parent): Fix comment. * wow64.h (wow64_needs_stack_adjustment): Accommodate new name.
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extern bool NO_COPY wow64_needs_stack_adjustment;
* Makefile.in (DLL_OFILES): Add wow64.o. * dcrt0.cc (CYGWIN_GUARD): Drop execute permission for stack, it's not used for stacks by the OS either. (child_info_fork::alloc_stack_hard_way): Ditto. (child_info_fork::alloc_stack): Don't alloc_stack_hard_way under WOW64 if forked from a 64 bit parent. Set child's StackBase to parent's StackBase. Add comments to explain why. (wow64_respawn): Move to wow64.cc. (wow64_started_from_native64): Move to wow64.cc. (respawn_wow64_process): Move to wow64.cc. (dll_crt0_0): Drop wow64_test_stack_marker and move stack test into wow64_test_for_64bit_parent function. Don't return early if WOW64 process has been started from native 64 bit process. (_dll_crt0): Implement moving stack for WOW64 processes started from native 64 bit process. * wow64.cc: New file. (wow64_has_64bit_parent): Rename from wow64_respawn. (wow64_test_for_64bit_parent): Rename from wow64_started_from_native64. Change comment. (wow64_revert_to_original_stack): New function. (wow64_respawn_process): Rename from respawn_wow64_process for symmetry. * wow64.h: New file.
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extern bool wow64_test_for_64bit_parent ();
extern PVOID wow64_revert_to_original_stack (PVOID &allocationbase);
* wow64.cc (wow64_revert_to_original_stack): Fix comment. * wow64.h (wow64_respawn_process): Declare noreturn.
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extern void wow64_respawn_process () __attribute__ ((noreturn));
* Merge in cygwin-64bit-branch.
2013-04-23 17:44:36 +08:00
#endif /* !__x86_64__ */