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libc/winsup/cygwin/wincap.cc
Corinna Vinschen 89d3c72d51 * child_info.h (CURR_CHILD_INFO_MAGIC): Update. 
(class child_info_fork): Remove stacksize, add stackaddr and guardsize
	members.
	* dcrt0.cc (child_info_fork::alloc_stack_hard_way): Partial rewrite
	to regenerate the stack exactly as in the parent.
	(child_info_fork::alloc_stack): Set stackaddr to 0, rather than
	stacksize.
	(dll_crt0_1): Check for stackaddr before changing the stack addresses
	in the TEB.
	* fork.cc (frok::child): Check for stackaddr here.
	(frok::parent): Set ch.stackaddr and ch.guardsize if not called from
	the main thread.
	* init.cc (dll_entry): Replace pointer to NT_TIB with pointer to TEB.
	Fix incorrectly changed address test before removing _my_tls.
	Set StackLimit to NULL on Windows 2000.  Explain why.
	* miscfuncs.cc (struct thread_wrapper_arg): Store stackbase rather
	than stacksize, store commitaddr, remove guardsize.  Store all pointers
	as char * for easier address arithmetic.
	(thread_wrapper): Rewrite to remove OS stack before calling thread
	function.  Add lots of comments to explain what we do.
	(CygwinCreateThread): Reserve our own stack in case we got no
	application stack.  Add comments.
	* ntdll.h (struct _TEB): Extend defintion up to DeallocationStack
	member.
	* thread.cc (pthread_attr::pthread_attr): Use "(size_t) -1"
	rather then 0xffffffff.
	* wincap.h (wincaps::has_stack_size_param_is_a_reservation): New
	element.
	* wincap.cc: Implement above element throughout.
2011-05-20 07:23:11 +00:00

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/* wincap.cc -- figure out on which OS we're running. Set the
capability class to the appropriate values.
Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
2009, 2010, 2011 Red Hat, Inc.
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. */
#include "winsup.h"
#include "security.h"
#include "ntdll.h"
/* CV, 2008-10-23: All wincapc's have to be in the .cygwin_dll_common section,
same as wincap itself. Otherwise the capability changes made in
wincapc::init() are not propagated to any subsequently started process
in the same session. I'm only writing this longish comment because I'm
puzzled that this has never been noticed before... */
/* Minimal set of capabilities required to run Cygwin. */
#define wincap_minimal wincap_2000
wincaps wincap_2000 __attribute__((section (".cygwin_dll_common"), shared)) = {
max_sys_priv:SE_MANAGE_VOLUME_PRIVILEGE,
is_server:false,
has_physical_mem_access:true,
has_create_global_privilege:false,
has_ioctl_storage_get_media_types_ex:false,
has_disk_ex_ioctls:false,
has_buggy_restart_scan:true,
has_mandatory_integrity_control:false,
needs_logon_sid_in_sid_list:true,
needs_count_in_si_lpres2:false,
has_recycle_dot_bin:false,
has_gaa_prefixes:false,
has_gaa_on_link_prefix:false,
supports_all_posix_ai_flags:false,
has_restricted_stack_args:false,
has_transactions:false,
has_recvmsg:false,
has_sendmsg:false,
has_broken_udf:true,
has_console_handle_problem:false,
has_broken_alloc_console:false,
has_always_all_codepages:false,
has_localenames:false,
has_buggy_thread_startup:false,
has_fast_cwd:false,
has_restricted_raw_disk_access:false,
use_dont_resolve_hack:false,
has_stack_size_param_is_a_reservation:false,
};
wincaps wincap_2000sp4 __attribute__((section (".cygwin_dll_common"), shared)) = {
max_sys_priv:SE_CREATE_GLOBAL_PRIVILEGE,
is_server:false,
has_physical_mem_access:true,
has_create_global_privilege:true,
has_ioctl_storage_get_media_types_ex:false,
has_disk_ex_ioctls:false,
has_buggy_restart_scan:true,
has_mandatory_integrity_control:false,
needs_logon_sid_in_sid_list:true,
needs_count_in_si_lpres2:false,
has_recycle_dot_bin:false,
has_gaa_prefixes:false,
has_gaa_on_link_prefix:false,
supports_all_posix_ai_flags:false,
has_restricted_stack_args:false,
has_transactions:false,
has_recvmsg:false,
has_sendmsg:false,
has_broken_udf:true,
has_console_handle_problem:false,
has_broken_alloc_console:false,
has_always_all_codepages:false,
has_localenames:false,
has_buggy_thread_startup:false,
has_fast_cwd:false,
has_restricted_raw_disk_access:false,
use_dont_resolve_hack:false,
has_stack_size_param_is_a_reservation:false,
};
wincaps wincap_xp __attribute__((section (".cygwin_dll_common"), shared)) = {
max_sys_priv:SE_MANAGE_VOLUME_PRIVILEGE,
is_server:false,
has_physical_mem_access:true,
has_create_global_privilege:false,
has_ioctl_storage_get_media_types_ex:true,
has_disk_ex_ioctls:true,
has_buggy_restart_scan:false,
has_mandatory_integrity_control:false,
needs_logon_sid_in_sid_list:false,
needs_count_in_si_lpres2:false,
has_recycle_dot_bin:false,
has_gaa_prefixes:false,
has_gaa_on_link_prefix:false,
supports_all_posix_ai_flags:false,
has_restricted_stack_args:false,
has_transactions:false,
has_recvmsg:true,
has_sendmsg:false,
has_broken_udf:true,
has_console_handle_problem:false,
has_broken_alloc_console:false,
has_always_all_codepages:false,
has_localenames:false,
has_buggy_thread_startup:false,
has_fast_cwd:false,
has_restricted_raw_disk_access:false,
use_dont_resolve_hack:true,
has_stack_size_param_is_a_reservation:true,
};
wincaps wincap_xpsp1 __attribute__((section (".cygwin_dll_common"), shared)) = {
max_sys_priv:SE_MANAGE_VOLUME_PRIVILEGE,
is_server:false,
has_physical_mem_access:true,
has_create_global_privilege:false,
has_ioctl_storage_get_media_types_ex:true,
has_disk_ex_ioctls:true,
has_buggy_restart_scan:false,
has_mandatory_integrity_control:false,
needs_logon_sid_in_sid_list:false,
needs_count_in_si_lpres2:false,
has_recycle_dot_bin:false,
has_gaa_prefixes:true,
has_gaa_on_link_prefix:false,
supports_all_posix_ai_flags:false,
has_restricted_stack_args:false,
has_transactions:false,
has_recvmsg:true,
has_sendmsg:false,
has_broken_udf:true,
has_console_handle_problem:false,
has_broken_alloc_console:false,
has_always_all_codepages:false,
has_localenames:false,
has_buggy_thread_startup:false,
has_fast_cwd:false,
has_restricted_raw_disk_access:false,
use_dont_resolve_hack:true,
has_stack_size_param_is_a_reservation:true,
};
wincaps wincap_xpsp2 __attribute__((section (".cygwin_dll_common"), shared)) = {
max_sys_priv:SE_CREATE_GLOBAL_PRIVILEGE,
is_server:false,
has_physical_mem_access:true,
has_create_global_privilege:true,
has_ioctl_storage_get_media_types_ex:true,
has_disk_ex_ioctls:true,
has_buggy_restart_scan:false,
has_mandatory_integrity_control:false,
needs_logon_sid_in_sid_list:false,
needs_count_in_si_lpres2:false,
has_recycle_dot_bin:false,
has_gaa_prefixes:true,
has_gaa_on_link_prefix:false,
supports_all_posix_ai_flags:false,
has_restricted_stack_args:false,
has_transactions:false,
has_recvmsg:true,
has_sendmsg:false,
has_broken_udf:true,
has_console_handle_problem:false,
has_broken_alloc_console:false,
has_always_all_codepages:false,
has_localenames:false,
has_buggy_thread_startup:false,
has_fast_cwd:false,
has_restricted_raw_disk_access:false,
use_dont_resolve_hack:true,
has_stack_size_param_is_a_reservation:true,
};
wincaps wincap_2003 __attribute__((section (".cygwin_dll_common"), shared)) = {
max_sys_priv:SE_CREATE_GLOBAL_PRIVILEGE,
is_server:false,
has_physical_mem_access:false,
has_create_global_privilege:true,
has_ioctl_storage_get_media_types_ex:true,
has_disk_ex_ioctls:true,
has_buggy_restart_scan:false,
has_mandatory_integrity_control:false,
needs_logon_sid_in_sid_list:false,
needs_count_in_si_lpres2:false,
has_recycle_dot_bin:false,
has_gaa_prefixes:true,
has_gaa_on_link_prefix:false,
supports_all_posix_ai_flags:false,
has_restricted_stack_args:true,
has_transactions:false,
has_recvmsg:true,
has_sendmsg:false,
has_broken_udf:true,
has_console_handle_problem:false,
has_broken_alloc_console:false,
has_always_all_codepages:false,
has_localenames:false,
has_buggy_thread_startup:false,
has_fast_cwd:false,
has_restricted_raw_disk_access:false,
use_dont_resolve_hack:true,
has_stack_size_param_is_a_reservation:true,
};
wincaps wincap_vista __attribute__((section (".cygwin_dll_common"), shared)) = {
max_sys_priv:SE_CREATE_SYMBOLIC_LINK_PRIVILEGE,
is_server:false,
has_physical_mem_access:false,
has_create_global_privilege:true,
has_ioctl_storage_get_media_types_ex:true,
has_disk_ex_ioctls:true,
has_buggy_restart_scan:false,
has_mandatory_integrity_control:true,
needs_logon_sid_in_sid_list:false,
needs_count_in_si_lpres2:true,
has_recycle_dot_bin:true,
has_gaa_prefixes:true,
has_gaa_on_link_prefix:true,
supports_all_posix_ai_flags:true,
has_restricted_stack_args:false,
has_transactions:true,
has_recvmsg:true,
has_sendmsg:true,
has_broken_udf:false,
has_console_handle_problem:false,
has_broken_alloc_console:false,
has_always_all_codepages:true,
has_localenames:true,
has_buggy_thread_startup:true,
has_fast_cwd:true,
has_restricted_raw_disk_access:true,
use_dont_resolve_hack:false,
has_stack_size_param_is_a_reservation:true,
};
wincaps wincap_7 __attribute__((section (".cygwin_dll_common"), shared)) = {
max_sys_priv:SE_CREATE_SYMBOLIC_LINK_PRIVILEGE,
is_server:false,
has_physical_mem_access:false,
has_create_global_privilege:true,
has_ioctl_storage_get_media_types_ex:true,
has_disk_ex_ioctls:true,
has_buggy_restart_scan:false,
has_mandatory_integrity_control:true,
needs_logon_sid_in_sid_list:false,
needs_count_in_si_lpres2:false,
has_recycle_dot_bin:true,
has_gaa_prefixes:true,
has_gaa_on_link_prefix:true,
supports_all_posix_ai_flags:true,
has_restricted_stack_args:false,
has_transactions:true,
has_recvmsg:true,
has_sendmsg:true,
has_broken_udf:false,
has_console_handle_problem:true,
has_broken_alloc_console:true,
has_always_all_codepages:true,
has_localenames:true,
has_buggy_thread_startup:false,
has_fast_cwd:true,
has_restricted_raw_disk_access:true,
use_dont_resolve_hack:false,
has_stack_size_param_is_a_reservation:true,
};
wincapc wincap __attribute__((section (".cygwin_dll_common"), shared));
void
wincapc::init ()
{
if (caps)
return; // already initialized
GetSystemInfo (&system_info);
memset (&version, 0, sizeof version);
version.dwOSVersionInfoSize = sizeof (OSVERSIONINFOEX);
if (!GetVersionEx (reinterpret_cast<LPOSVERSIONINFO>(&version)))
api_fatal ("Cygwin requires at least Windows 2000.");
switch (version.dwPlatformId)
{
case VER_PLATFORM_WIN32_NT:
switch (version.dwMajorVersion)
{
case 4:
/* I'd be very surprised if this code is ever hit, but it doesn't
hurt to keep it. */
api_fatal ("Cygwin requires at least Windows 2000.");
break;
case 5:
switch (version.dwMinorVersion)
{
case 0:
if (version.wServicePackMajor < 4)
caps = &wincap_2000;
else
caps = &wincap_2000sp4;
break;
case 1:
caps = &wincap_xp;
switch (version.wServicePackMajor)
{
case 0:
caps = &wincap_xp;
case 1:
caps = &wincap_xpsp1;
default:
caps = &wincap_xpsp2;
}
break;
default:
caps = &wincap_2003;
}
break;
case 6:
switch (version.dwMinorVersion)
{
case 0:
caps = &wincap_vista;
break;
default:
caps = &wincap_7;
break;
}
break;
default:
caps = &wincap_minimal;
break;
}
break;
case VER_PLATFORM_WIN32_WINDOWS:
/* I'd be very surprised if this code is ever hit, but it doesn't
hurt to keep it. */
api_fatal ("Windows 95/98/Me are not supported.");
break;
default:
caps = &wincap_minimal;
break;
}
((wincaps *)caps)->is_server = (version.wProductType != VER_NT_WORKSTATION);
if (NT_SUCCESS (NtQueryInformationProcess (NtCurrentProcess (),
ProcessWow64Information,
&wow64, sizeof wow64, NULL))
&& !wow64)
{
((wincaps *)caps)->needs_count_in_si_lpres2 = false;
((wincaps *)caps)->has_restricted_stack_args = false;
}
if (!wow64)
((wincaps *) caps)->has_buggy_thread_startup = false;
__small_sprintf (osnam, "NT-%d.%d", version.dwMajorVersion,
version.dwMinorVersion);
}
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