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newlib-cygwin
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* dcrt0.cc (initial_env): Don't attempt stracing if dynamically loaded. 

(dll_crt0_0): Move console initialization earlier.
* init.cc (dll_entry): Move console initialization here.
* exceptions.cc (init_console_handler): Fully remove any old console handler.
* spawn.cc (spawn_guts): Don't fill out windows argv if we've deduced that this
is a cygwin-using program.
(av::fixup): Always check executables to see if they are using cygwin1.dll.
Don't consider .com files to be scripts.
* hookapi.cc (rvadelta): New function.
(PEHeaderFromHModule): Simplify slightly.
(hook_or_detect_cygwin): Use passed in name argument for "HMODULE" rather than
incorrectly reading current program.  Calculate delta needed to read image data
and file names if this isn't a real "HMODULE".
This commit is contained in:
Christopher Faylor 2005-09-07 03:10:17 +00:00
parent e92fdf0163
commit 41ff9d8c7d
6 changed files with 64 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,22 @@
2005-09-06 Christopher Faylor <cgf@timesys.com>
* dcrt0.cc (initial_env): Don't attempt stracing if dynamically loaded.
(dll_crt0_0): Move console initialization earlier.
* init.cc (dll_entry): Move console initialization here.
* exceptions.cc (init_console_handler): Fully remove any old console
handler.
* spawn.cc (spawn_guts): Don't fill out windows argv if we've deduced
that this is a cygwin-using program.
(av::fixup): Always check executables to see if they are using
cygwin1.dll. Don't consider .com files to be scripts.
* hookapi.cc (rvadelta): New function.
(PEHeaderFromHModule): Simplify slightly.
(hook_or_detect_cygwin): Use passed in name argument for "HMODULE"
rather than incorrectly reading current program. Calculate delta
needed to read image data and file names if this isn't a real
"HMODULE".
2005-09-06 Corinna Vinschen <corinna@vinschen.de>
* thread.h: Revert patch from 2005-09-05.

3
winsup/cygwin/dcrt0.cc
View File

@ -547,7 +547,7 @@ initial_env ()
len = GetModuleFileName (NULL, buf, CYG_MAX_PATH);
console_printf ("Sleeping %d, pid %u %s\n", ms, GetCurrentProcessId (), buf);
Sleep (ms);
if (!strace.active)
if (!strace.active && !dynamically_loaded)
{
strace.inited = 0;
strace.hello ();
@ -634,7 +634,6 @@ dll_crt0_0 ()
wincap.init ();
initial_env ();
init_console_handler (TRUE);
init_global_security ();
if (!DuplicateHandle (GetCurrentProcess (), GetCurrentProcess (),
GetCurrentProcess (), &hMainProc, 0, FALSE,

14
winsup/cygwin/exceptions.cc
View File

@ -123,7 +123,8 @@ void
init_console_handler (BOOL install_handler)
{
BOOL res;
SetConsoleCtrlHandler (ctrl_c_handler, FALSE);
while (SetConsoleCtrlHandler (ctrl_c_handler, FALSE))
continue;
if (install_handler)
res = SetConsoleCtrlHandler (ctrl_c_handler, TRUE);
else if (wincap.has_null_console_handler_routine ())
@ -591,7 +592,11 @@ int __stdcall
handle_sigsuspend (sigset_t tempmask)
{
if (&_my_tls != _main_tls)
Sleep (INFINITE);
{
cancelable_wait (signal_arrived, INFINITE, cw_cancel_self);
return -1;
}
sigset_t oldmask = myself->getsigmask (); // Remember for restoration
set_signal_mask (tempmask, myself->getsigmask ());
@ -845,6 +850,11 @@ ctrl_c_handler (DWORD type)
_my_tls.remove (INFINITE);
#if 0
if (type == CTRL_C_EVENT || type == CTRL_BREAK_EVENT)
proc_subproc (PROC_KILLFORKED, 0);
#endif
/* Return FALSE to prevent an "End task" dialog box from appearing
for each Cygwin process window that's open when the computer
is shut down or console window is closed. */

28
winsup/cygwin/hookapi.cc
View File

@ -23,10 +23,10 @@ struct function_hook
static PIMAGE_NT_HEADERS
PEHeaderFromHModule (HMODULE hModule)
{
PIMAGE_NT_HEADERS pNTHeader = NULL;
PIMAGE_NT_HEADERS pNTHeader;
if (PIMAGE_DOS_HEADER(hModule) ->e_magic != IMAGE_DOS_SIGNATURE)
/* nothing */;
pNTHeader = NULL;
else
{
pNTHeader = PIMAGE_NT_HEADERS (PBYTE (hModule)
@ -38,6 +38,18 @@ PEHeaderFromHModule (HMODULE hModule)
return pNTHeader;
}
long
rvadelta (PIMAGE_NT_HEADERS pnt, long import_rva)
{
PIMAGE_SECTION_HEADER section = (PIMAGE_SECTION_HEADER) (pnt + 1);
for (int i = 0; i < pnt->FileHeader.NumberOfSections; i++)
if (section[i].VirtualAddress <= import_rva
&& (section[i].VirtualAddress + section[i].Misc.VirtualSize) >= import_rva)
// if (strncasematch ((char *) section[i].Name, ".idata", IMAGE_SIZEOF_SHORT_NAME))
return section[i].VirtualAddress - section[i].PointerToRawData;
return -1;
}
void *
putmem (PIMAGE_THUNK_DATA pi, const void *hookfn)
{
@ -152,7 +164,7 @@ makename (const char *name, char *&buf, int& i, int inc)
void *
hook_or_detect_cygwin (const char *name, const void *fn)
{
HMODULE hm = GetModuleHandle (NULL);
HMODULE hm = fn ? GetModuleHandle (NULL) : (HMODULE) name;
PIMAGE_NT_HEADERS pExeNTHdr = PEHeaderFromHModule (hm);
if (!pExeNTHdr)
@ -163,18 +175,22 @@ hook_or_detect_cygwin (const char *name, const void *fn)
if (!importRVA)
return false;
long delta = fn ? 0 : rvadelta (pExeNTHdr, importRVA);
if (delta < 0)
return false;
// Convert imports RVA to a usable pointer
PIMAGE_IMPORT_DESCRIPTOR pdfirst = rva (PIMAGE_IMPORT_DESCRIPTOR, hm, importRVA);
PIMAGE_IMPORT_DESCRIPTOR pdfirst = rva (PIMAGE_IMPORT_DESCRIPTOR, hm, importRVA - delta);
function_hook fh;
fh.origfn = NULL;
fh.hookfn = fn;
char *buf = (char *) alloca (strlen (name) + strlen ("64") + sizeof ("_"));
char *buf = fn ? NULL : (char *) alloca (strlen (name) + strlen ("64") + sizeof ("_"));
int i;
// Iterate through each import descriptor, and redirect if appropriate
for (PIMAGE_IMPORT_DESCRIPTOR pd = pdfirst; pd->FirstThunk; pd++)
{
if (!strcasematch (rva (PSTR, hm, pd->Name), "cygwin1.dll"))
if (!strcasematch (rva (PSTR, hm, pd->Name - delta), "cygwin1.dll"))
continue;
if (!fn)
return (void *) "found it"; // just checking if executable used cygwin1.dll

1
winsup/cygwin/init.cc
View File

@ -147,6 +147,7 @@ dll_entry (HANDLE h, DWORD reason, void *static_load)
case DLL_PROCESS_ATTACH:
cygwin_hmodule = (HMODULE) h;
dynamically_loaded = (static_load == NULL);
init_console_handler (TRUE);
/* Is the stack at an unusual address? This is, an address which
is in the usual space occupied by the process image, but below

14
winsup/cygwin/spawn.cc
View File

@ -279,7 +279,7 @@ class av
bool win16_exe;
bool iscygwin;
av (): argv (NULL) {}
av (int ac_in, const char * const *av_in) : calloced (0), error (false), argc (ac_in), win16_exe (false), iscygwin (true)
av (int ac_in, const char * const *av_in) : calloced (0), error (false), argc (ac_in), win16_exe (false), iscygwin (false)
{
argv = (char **) cmalloc (HEAP_1_ARGV, (argc + 5) * sizeof (char *));
memcpy (argv, av_in, (argc + 1) * sizeof (char *));
@ -459,6 +459,7 @@ spawn_guts (const char * prog_arg, const char *const *argv,
one_line.add (argv[2]);
strcpy (real_path, argv[0]);
null_app_name = true;
newargv.iscygwin = false;
goto skip_arg_parsing;
}
@ -476,7 +477,7 @@ spawn_guts (const char * prog_arg, const char *const *argv,
if (res)
goto out;
if (real_path.iscygexec ())
if (real_path.iscygexec () || newargv.iscygwin)
newargv.dup_all ();
else
{
@ -1020,9 +1021,7 @@ av::fixup (child_info_types chtype, const char *prog_arg, path_conv& real_path,
{
/* If the file name ends in either .exe, .com, .bat, or .cmd we assume
that it is NOT a script file */
while (*ext == '\0' || chtype == PROC_SPAWN
|| (wincap.detect_win16_exe () && (strcasematch (ext, ".exe")
|| strcasematch (ext, ".com"))))
while (1)
{
HANDLE h = CreateFile (real_path, GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
@ -1092,6 +1091,11 @@ av::fixup (child_info_types chtype, const char *prog_arg, path_conv& real_path,
UnmapViewOfFile (buf);
if (!pgm)
{
if (strcasematch (ext, ".com"))
{
iscygwin = false;
break;
}
pgm = (char *) "/bin/sh";
arg1 = NULL;
}