libs/newlib-cygwin
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newlib-cygwin/winsup/cygwin/winsup.h
Corinna Vinschen 5a101414ed * exceptions.cc (_cygtls::handle_exceptions): In case of a 
STATUS_ACCESS_VIOLATION, check if the page is a mmaped page beyond
	a file's EOF.  Generate SIGBUS instead of SIGSEGV then.
	* mmap.cc (__PROT_ATTACH): New define.
	(__PROT_FILLER): Ditto.
	(fh_anonymous): Rename from fh_paging_file;
	(fh_disk_file): New global static variable.
	(attached): New inline function.
	(filler): Ditto.
	(gen_create_protect): Split off from gen_protect to use the file's
	access mode to create mapping always with maximum allowed protections.
	(gen_protect): Accomodate pages attached beyond EOF.  Use symbolic
	values instead of numerics when possible.  Drop create parameter.
	(gen_access): Use file's access mode instead of protection.
	(CreateMapping9x): Create named mapping names so that different
	creation access modes result in different mappings.
	(CreateMappingNT): Only reserve attached pages, don't commit them.
	(MapViewNT): Ditto.  Set AT_ROUND_TO_PAGE for all non-NULL base
	addresses.
	(mmap_func_t): Define CreateMapping and MapView function pointers
	with additional openflags parameter.
	(class mmap_record): Add openflags member.
	(mmap_record::mmap_record): Add openflags parameter.
	(mmap_record::get_openflags): New accessor.
	(mmap_record::attached): Call global attached function.
	(mmap_record::filler): Call global filler function.
	(mmap_record::gen_create_protect): Call global gen_create_protect
	function.
	(mmap_record::gen_protect): Drop create parameter.
	(mmap_record::alloc_fh): Set fhandler's access flags.
	(list::search_record): Accomodate filler pages.
	(list::set): Use inode number as hash value.
	(map::get_list_by_fd): Check hash value against file's inode number.
	(mmap_is_attached_page): New function to evaluate if a given address
	is on a attached page.  Called from _cygtls::handle_exceptions.
	(mmap_worker): New function to do mapping and bookkeeping in a
	single call.
	(mmap64): Use roundup2 to round length to pagesize alignment.
	Initialize global fhandlers.  Simplify anonymous initialization.
	Add SUSv3 compatible check of file open mode vs. requested protection.
	Try creating new file handles to allow maximum page protection.
	Allow creating attached pages in case of mapping beyond EOF.
	Close new file handle if one has been created.
	(munmap): Align len to pagesize.
	(msync): Rework argument checks. Align len to pagesize.
	(mprotect): Ditto.  Accomodate attached pages.
	(mlock): Use roundup/rounddown macros instead of homemade expressions.
	(munlock): Add page alignment as in mlock.
	(fhandler_dev_zero::munmap): Fix unmapping of non-private mappings.
	(fhandler_dev_zero::fixup_mmap_after_fork): Accomodate filler pages.
	(fixup_mmaps_after_fork): Don't fail if attached pages couldn't be
	created in child.  Avoid superfluous call to VirtualFree.  Check for
	original allocation protection to fix PAGE_WRITECOPY protection.
	* ntdll.h: Revert deletion of AT_ROUND_TO_PAGE define.
	* winsup.h (mmap_is_attached_page): Declare.
2005-12-07 11:16:47 +00:00

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/* winsup.h: main Cygwin header file.
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
2005 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. */
#ifdef DEBUGIT
#define spf(a, b, c) small_printf (a, b, c)
#else
#define spf(a, b, c) do {} while (0)
#endif
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#define __INSIDE_CYGWIN__
#define strlen __builtin_strlen
#define strcmp __builtin_strcmp
#define strcpy __builtin_strcpy
#define memcpy __builtin_memcpy
#define memcmp __builtin_memcmp
#ifdef HAVE_BUILTIN_MEMSET
# define memset __builtin_memset
#endif
#define NO_COPY __attribute__((nocommon)) __attribute__((section(".data_cygwin_nocopy")))
#define NO_COPY_INIT __attribute__((section(".data_cygwin_nocopy")))
#define EXPORT_ALIAS(sym,symalias) extern "C" __typeof (sym) symalias __attribute__ ((alias(#sym)));
#if !defined(__STDC_VERSION__) || __STDC_VERSION__ >= 199900L
#define NEW_MACRO_VARARGS
#endif
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0501
#endif
#include <sys/types.h>
#include <sys/strace.h>
/* Declarations for functions used in C and C++ code. */
#ifdef __cplusplus
extern "C" {
#endif
extern __uid32_t getuid32 (void);
extern __uid32_t geteuid32 (void);
extern int seteuid32 (__uid32_t);
extern __gid32_t getegid32 (void);
extern struct passwd *getpwuid32 (__uid32_t);
extern struct passwd *getpwnam (const char *);
extern struct __sFILE64 *fopen64 (const char *, const char *);
extern struct hostent *cygwin_gethostbyname (const char *name);
extern unsigned long cygwin_inet_addr (const char *cp);
#ifdef __cplusplus
}
#endif
/* Note that MAX_PATH is defined in the windows headers */
/* There is also PATH_MAX and MAXPATHLEN.
PATH_MAX is from Posix and does *not* include the trailing NUL.
MAXPATHLEN is from Unix.
Thou shalt use CYG_MAX_PATH throughout. It avoids the NUL vs no-NUL
issue and is neither of the Unixy ones [so we can punt on which
one is the right one to use].
Windows ANSI calls are limited to MAX_PATH in length. Cygwin calls that
thunk through to Windows Wide calls are limited to 32K. We define
CYG_MAX_PATH as a convenient, not to short, not too long 'happy medium'.
*/
#define CYG_MAX_PATH (MAX_PATH)
#ifdef __cplusplus
extern const char case_folded_lower[];
#define cyg_tolower(c) (case_folded_lower[(unsigned char)(c)])
extern const char case_folded_upper[];
#define cyg_toupper(c) (case_folded_upper[(unsigned char)(c)])
#ifndef MALLOC_DEBUG
#define cfree newlib_cfree_dont_use
#endif
#define WIN32_LEAN_AND_MEAN 1
#define _WINGDI_H
#define _WINUSER_H
#define _WINNLS_H
#define _WINVER_H
#define _WINNETWK_H
#define _WINSVC_H
#include <windows.h>
#include <wincrypt.h>
#include <lmcons.h>
#undef _WINGDI_H
#undef _WINUSER_H
#undef _WINNLS_H
#undef _WINVER_H
#undef _WINNETWK_H
#undef _WINSVC_H
#include "wincap.h"
/* The one function we use from winuser.h most of the time */
extern "C" DWORD WINAPI GetLastError (void);
enum codepage_type {ansi_cp, oem_cp};
extern codepage_type current_codepage;
UINT get_cp ();
int __stdcall sys_wcstombs(char *, const WCHAR *, int)
__attribute__ ((regparm(3)));
int __stdcall sys_mbstowcs(WCHAR *, const char *, int)
__attribute__ ((regparm(3)));
/* Used to check if Cygwin DLL is dynamically loaded. */
extern int dynamically_loaded;
extern int cygserver_running;
#define _MT_SAFE // DELTEME someday
#define TITLESIZE 1024
#include "debug.h"
/* Events/mutexes */
extern HANDLE tty_mutex;
/**************************** Convenience ******************************/
/* Used to define status flag accessor methods */
#define IMPLEMENT_STATUS_FLAG(type,flag) \
void flag (type val) { status.flag = (val); } \
type flag () const { return (type) status.flag; }
/* Used when treating / and \ as equivalent. */
#define isdirsep(ch) \
({ \
char __c = (ch); \
((__c) == '/' || (__c) == '\\'); \
})
/* Convert a signal to a signal mask */
#define SIGTOMASK(sig) (1 << ((sig) - signal_shift_subtract))
extern unsigned int signal_shift_subtract;
#ifdef NEW_MACRO_VARARGS
# define api_fatal(...) __api_fatal (__VA_ARGS__)
#else
# define api_fatal(fmt, args...) __api_fatal ("%P: *** " fmt,## args)
#endif
#undef issep
#define issep(ch) (strchr (" \t\n\r", (ch)) != NULL)
#define isabspath(p) \
(isdirsep (*(p)) || (isalpha (*(p)) && (p)[1] == ':' && (!(p)[2] || isdirsep ((p)[2]))))
/******************** Initialization/Termination **********************/
class per_process;
/* cygwin .dll initialization */
void dll_crt0 (per_process *) __asm__ ("_dll_crt0__FP11per_process");
extern "C" void __stdcall _dll_crt0 ();
/* dynamically loaded dll initialization */
extern "C" int dll_dllcrt0 (HMODULE, per_process *);
/* dynamically loaded dll initialization for non-cygwin apps */
extern "C" int dll_noncygwin_dllcrt0 (HMODULE, per_process *);
/* exit the program */
enum exit_states
{
ES_NOT_EXITING = 0,
ES_SET_MUTO,
ES_GLOBAL_DTORS,
ES_EVENTS_TERMINATE,
ES_THREADTERM,
ES_SIGNAL,
ES_CLOSEALL,
ES_HUP_PGRP,
ES_HUP_SID,
ES_EXEC_EXIT,
ES_TITLE,
ES_TTY_TERMINATE,
ES_FINAL
};
extern exit_states exit_state;
void __stdcall do_exit (int) __attribute__ ((regparm (1), noreturn));
/* UID/GID */
void uinfo_init ();
#define ILLEGAL_UID16 ((__uid16_t)-1)
#define ILLEGAL_UID ((__uid32_t)-1)
#define ILLEGAL_GID16 ((__gid16_t)-1)
#define ILLEGAL_GID ((__gid32_t)-1)
#define ILLEGAL_SEEK ((_off64_t)-1)
#define uid16touid32(u16) ((u16)==ILLEGAL_UID16?ILLEGAL_UID:(__uid32_t)(u16))
#define gid16togid32(g16) ((g16)==ILLEGAL_GID16?ILLEGAL_GID:(__gid32_t)(g16))
/* Convert LARGE_INTEGER into long long */
#define get_ll(pl) (((long long) (pl).HighPart << 32) | (pl).LowPart)
/* various events */
void events_init ();
void events_terminate ();
void __stdcall close_all_files (bool = false);
/* debug_on_trap support. see exceptions.cc:try_to_debug() */
extern "C" void error_start_init (const char*);
extern "C" int try_to_debug (bool waitloop = 1);
extern void ld_preload ();
void set_file_api_mode (codepage_type);
extern bool cygwin_finished_initializing;
/**************************** Miscellaneous ******************************/
void __stdcall set_std_handle (int);
int __stdcall stat_dev (DWORD, int, unsigned long, struct __stat64 *);
__ino64_t __stdcall hash_path_name (__ino64_t hash, const char *name) __attribute__ ((regparm(2)));
void __stdcall nofinalslash (const char *src, char *dst) __attribute__ ((regparm(2)));
extern "C" char *__stdcall rootdir (const char *full_path, char *root_path) __attribute__ ((regparm(2)));
/* String manipulation */
extern "C" char *__stdcall strccpy (char *s1, const char **s2, char c);
extern "C" int __stdcall strcasematch (const char *s1, const char *s2) __attribute__ ((regparm(2)));
extern "C" int __stdcall strncasematch (const char *s1, const char *s2, size_t n) __attribute__ ((regparm(3)));
extern "C" char *__stdcall strcasestr (const char *searchee, const char *lookfor) __attribute__ ((regparm(2)));
void *hook_or_detect_cygwin (const char *, const void *) __attribute__ ((regparm (2)));
/* Time related */
void __stdcall totimeval (struct timeval *, FILETIME *, int, int);
long __stdcall to_time_t (FILETIME *);
void __stdcall to_timestruc_t (FILETIME *, timestruc_t *);
void __stdcall time_as_timestruc_t (timestruc_t *);
void __stdcall timeval_to_filetime (const struct timeval *, FILETIME *);
/* Console related */
void __stdcall set_console_title (char *);
void init_console_handler (BOOL);
void init_global_security ();
int __stdcall check_invalid_virtual_addr (const void *s, unsigned sz) __attribute__ ((regparm(2)));
ssize_t check_iovec (const struct iovec *, int, bool) __attribute__ ((regparm(3)));
#define check_iovec_for_read(a, b) check_iovec ((a), (b), false)
#define check_iovec_for_write(a, b) check_iovec ((a), (b), true)
#define set_winsock_errno() __set_winsock_errno (__FUNCTION__, __LINE__)
void __set_winsock_errno (const char *fn, int ln) __attribute__ ((regparm(2)));
extern bool wsock_started;
/* Printf type functions */
extern "C" void __api_fatal (const char *, ...) __attribute__ ((noreturn));
extern "C" int __small_sprintf (char *dst, const char *fmt, ...) /*__attribute__ ((regparm (2)))*/;
extern "C" int __small_vsprintf (char *dst, const char *fmt, va_list ap) /*__attribute__ ((regparm (3)))*/;
extern void multiple_cygwin_problem (const char *, unsigned, unsigned);
extern "C" void vklog (int priority, const char *message, va_list ap);
extern "C" void klog (int priority, const char *message, ...);
int child_copy (HANDLE, DWORD, const char *, void *, void *);
int symlink_worker (const char *, const char *, bool, bool)
__attribute__ ((regparm (3)));
class path_conv;
int fcntl_worker (int fd, int cmd, void *arg);
extern "C" int low_priority_sleep (DWORD) __attribute__ ((regparm (1)));
#define SLEEP_0_STAY_LOW INFINITE
/* Returns the real page size, not the allocation size. */
size_t getsystempagesize ();
/* mmap functions. */
void mmap_init ();
bool mmap_is_attached_page (ULONG_PTR);
int winprio_to_nice (DWORD) __attribute__ ((regparm (1)));
DWORD nice_to_winprio (int &) __attribute__ ((regparm (1)));
bool __stdcall create_pipe (PHANDLE hr, PHANDLE, LPSECURITY_ATTRIBUTES, DWORD)
__attribute__ ((regparm (3)));
#define CreatePipe create_pipe
/**************************** Exports ******************************/
extern "C" {
int cygwin_select (int , fd_set *, fd_set *, fd_set *,
struct timeval *to);
int cygwin_gethostname (char *__name, size_t __len);
extern DWORD binmode;
extern char _data_start__, _data_end__, _bss_start__, _bss_end__;
extern void (*__CTOR_LIST__) (void);
extern void (*__DTOR_LIST__) (void);
extern SYSTEM_INFO system_info;
};
/*************************** Unsorted ******************************/
#define WM_ASYNCIO 0x8000 // WM_APP
#define STD_RBITS (S_IRUSR | S_IRGRP | S_IROTH)
#define STD_WBITS (S_IWUSR)
#define STD_XBITS (S_IXUSR | S_IXGRP | S_IXOTH)
#define NO_W ~(S_IWUSR | S_IWGRP | S_IWOTH)
#define NO_R ~(S_IRUSR | S_IRGRP | S_IROTH)
#define NO_X ~(S_IXUSR | S_IXGRP | S_IXOTH)
/* The title on program start. */
extern char *old_title;
extern bool display_title;
extern HANDLE hMainThread;
extern HANDLE hMainProc;
extern HANDLE hProcToken;
extern HANDLE hProcImpToken;
extern HANDLE hExeced;
extern bool cygwin_testing;
extern char almost_null[];
#endif /* defined __cplusplus */
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