summaryrefslogtreecommitdiffstats
path: root/winsup/cygwin/wow64.cc
Commit message (Collapse)AuthorAgeFilesLines
* Always allocate main thread stack from pthread stack area on x86_64.Corinna Vinschen2015-12-071-23/+10
| | | | | | | | | | | | | | | | | | | | | | | | | * dcrt0.cc: Semi-revert commit 12743c2d5d2721f3a80b4d7671a349be03c1f520. (dll_crt0_0): Drop setting wow64_needs_stack_adjustment on 64 bit. (_dll_crt0): Split out 64 bit code again and always create new main thread stack, unless forked off from the non main thread in the parent. Call create_new_main_thread_stack with parent stack commitsize if started from the parent's main thread. Only call child_info_fork::alloc_stack for the latter case on 64 bit. Slightly rearrange moving rsp and rbp to new stack and document how. Revert 32 bit wow64 handling to its former self. * miscfunc.cc (create_new_main_thread_stack): Take a commitsize parameter and use it if it's not 0. Don't set _main_tls here, it's done in the caller _dll_crt0 anyway. Return stackbase - 16 bytes, rather than stacklimit (which was very wrong anyway). * miscfuncs.h (create_new_main_thread_stack): Accommodate declaration to aforementioned change. * wincap.h (wincaps::has_3264_stack_broken): Remove element. * wincap.cc: Ditto, throughout. * wow64.cc: Semi-revert to pre-12743c2d5d2721f3a80b4d7671a349be03c1f520 but keep architecture-agnostic type changes intact. Fix formatting. * wow64.h: Revert to pre-12743c2d5d2721f3a80b4d7671a349be03c1f520. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* On 64 bit, only create new thread stack if started from 32 bit process on ↵Corinna Vinschen2015-12-031-12/+25
| | | | | | | | | | | | | | | | | | | | | | 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>
* Drop using _tlsbase and _tlstop in favor of access via NtCurrentTeb.Corinna Vinschen2015-12-021-3/+3
| | | | | | | | | | | | | * cygtls.h (_tlsbase): Remove. Replace throughout with NtCurrentTeb()->Tib.StackBase. (_tlstop): Remove. Replace throughout with NtCurrentTeb()->Tib.StackLimit. * dcrt0.cc (child_info_fork::alloc_stack): Move definition of local teb variable up to be used throughout. * include/cygwin/config.h (__getreent): Use inline function on both architectures. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* cygwin: Fix copyright datesCorinna Vinschen2015-07-291-1/+1
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Reduce stack pressure throughout CygwinCorinna Vinschen2015-07-191-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * dcrt0.cc (initial_env): Reduce size of local path buffers to PATH_MAX. Allocate debugger_command from process heap. (init_windows_system_directory): Very early initialize new global variable global_progname. * dll_init.cc (dll_list::alloc): Make path buffer static. Explain why. (dll_list::populate_deps): Use tmp_pathbuf for local path buffer. * exceptions.cc (debugger_command): Convert to PWCHAR. (error_start_init): Allocate debugger_command and fill with wide char strings. Only allocate if NULL. (try_to_debug): Just check if debugger_command is a NULL pointer to return. Drop conversion from char to WCHAR and drop local variable dbg_cmd. * globals.cc (global_progname): New global variable to store Windows application path. * pinfo.cc (pinfo_basic::pinfo_basic): Just copy progname over from global_progname. (pinfo::status_exit): Let path_conv create the POSIX path to avoid local buffer. * pseudo_reloc.cc (__report_error): Utilize global_progname, drop local buffer. * smallprint.cc (__small_vsprintf): Just utilize global_progname for %P format specifier. (__small_vswprintf): Ditto. * strace.cc (PROTECT): Change to reflect x being a pointer. Reformat. (CHECK): Ditto. Reformat. (strace::activate): Utilize global_progname, drop local buffer. Fix formatting. (strace::vsprntf): Reduce size of local progname buffer to NAME_MAX. Copy and, if necessary, convert only the last path component to progname. (strace_buf_guard): New muto. (buf): New static pointer. (strace::vprntf): Use buf under strace_buf_guard lock only. Allocate buffer space for buf on Windows heap. * wow64.cc (wow64_respawn_process): Utilize global_progname, drop local path buffer. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* * Merge in cygwin-64bit-branch.Corinna Vinschen2013-04-231-4/+10
|
* * dcrt0.cc (_dll_crt0): Rephrase comments. Set $ebp to NULL, as inCorinna Vinschen2011-12-211-4/+6
| | | | | | the pthread stack setup. * wow64.cc (wow64_revert_to_original_stack): Rephrase some comments. Return _tlsbase-16 rather than _main_tls-4 so as not to waste stack.
* * dcrt0.cc (dll_crt0_0): Check for wincap.wow64_has_secondary_stackCorinna Vinschen2011-12-191-8/+15
| | | | | | | | | | | | | | | 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.
* Clean up whitespace.Christopher Faylor2011-12-171-5/+5
|
* * wow64.cc (wow64_revert_to_original_stack): Fix comment.Corinna Vinschen2011-12-171-3/+3
| | | | * wow64.h (wow64_respawn_process): Declare noreturn.
* * dcrt0.cc (child_info_fork::alloc_stack): Correctly check if theCorinna Vinschen2011-12-161-33/+70
| | | | | | | | | | | | parent stack fits into the child stack. Align comment. * wow64.cc (wow64_eval_expected_main_stack): New function to fetch expected addresses of main thread stack from PE/COFF image header values. (wow64_test_for_64bit_parent): Fix comment. Check current stack against real expected main thread stack addresses. (wow64_revert_to_original_stack): Fix and add comments. Check memory against real expected main thread stack addresses. Use orignal stack if reserved area is >= 256K.
* * Makefile.in (DLL_OFILES): Add wow64.o.Corinna Vinschen2011-12-161-0/+165
* 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.
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-16 15:15:50 +0000