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* fhandler_mem.cc: Load ntdll functions via autoload method. 

(load_ntdll_funcs): Eliminated.
This commit is contained in:
Corinna Vinschen 2000-10-02 09:07:50 +00:00
parent 2f696b4bdb
commit a26fb3150d
2 changed files with 58 additions and 82 deletions
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5
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,8 @@
Mon Oct 2 11:05:00 2000 Corinna Vinschen <corinna@vinschen.de>
* fhandler_mem.cc: Load ntdll functions via autoload method.
(load_ntdll_funcs): Eliminated.
Sun Oct 1 16:36:00 2000 Corinna Vinschen <corinna@vinschen.de>
* fhandler_mem.cc (load_ntdll_funcs): Add missing __stdcall qualifiers.

135
winsup/cygwin/fhandler_mem.cc
View File

@ -15,91 +15,20 @@
#include <unistd.h>
#include <ntdef.h>
#include "autoload.h"
#include "cygheap.h"
#include "cygerrno.h"
#include "fhandler.h"
#include "path.h"
static int inited = FALSE;
NTSTATUS (__stdcall *NtMapViewOfSection)(HANDLE,HANDLE,PVOID*,ULONG,ULONG,
PLARGE_INTEGER,PULONG,SECTION_INHERIT,
ULONG,ULONG);
NTSTATUS (__stdcall *NtOpenSection)(PHANDLE,ACCESS_MASK,POBJECT_ATTRIBUTES);
NTSTATUS (__stdcall *NtUnmapViewOfSection)(HANDLE,PVOID);
VOID (__stdcall *RtlInitUnicodeString)(PUNICODE_STRING,PCWSTR);
ULONG (__stdcall *RtlNtStatusToDosError) (NTSTATUS);
int
load_ntdll_funcs ()
{
int ret = 0;
if (os_being_run != winNT)
{
set_errno (ENOENT);
debug_printf ("/dev/mem is accessible under NT/W2K only");
return 0;
}
HMODULE ntdll = GetModuleHandle ("ntdll.dll");
if (inited)
{
debug_printf ("function pointers already inited");
return 1;
}
if (!ntdll)
{
__seterrno ();
goto out;
}
if (!(NtMapViewOfSection = (NTSTATUS (__stdcall *)(HANDLE,HANDLE,PVOID*,ULONG,
ULONG,PLARGE_INTEGER,
PULONG,SECTION_INHERIT,
ULONG,ULONG))
GetProcAddress (ntdll, "NtMapViewOfSection")))
{
__seterrno ();
goto out;
}
if (!(NtOpenSection = (NTSTATUS (__stdcall *)(PHANDLE,ACCESS_MASK,
POBJECT_ATTRIBUTES))
GetProcAddress (ntdll, "NtOpenSection")))
{
__seterrno ();
goto out;
}
if (!(NtUnmapViewOfSection = (NTSTATUS (__stdcall *)(HANDLE,PVOID))
GetProcAddress (ntdll, "NtUnmapViewOfSection")))
{
__seterrno ();
goto out;
}
if (!(RtlInitUnicodeString = (VOID (__stdcall *)(PUNICODE_STRING,PCWSTR))
GetProcAddress (ntdll, "RtlInitUnicodeString")))
{
__seterrno ();
goto out;
}
if (!(RtlNtStatusToDosError = (ULONG (__stdcall *)(NTSTATUS))
GetProcAddress (ntdll, "RtlNtStatusToDosError")))
{
__seterrno ();
goto out;
}
inited = TRUE;
ret = 1;
out:
debug_printf ("%d = load_ntdll_funcs()", ret);
return ret;
extern "C" {
NTSTATUS NTAPI NtMapViewOfSection(HANDLE,HANDLE,PVOID*,ULONG,ULONG,
PLARGE_INTEGER,PULONG,SECTION_INHERIT,
ULONG,ULONG);
NTSTATUS NTAPI NtOpenSection(PHANDLE,ACCESS_MASK,POBJECT_ATTRIBUTES);
NTSTATUS NTAPI NtUnmapViewOfSection(HANDLE,PVOID);
VOID NTAPI RtlInitUnicodeString(PUNICODE_STRING,PCWSTR);
ULONG NTAPI RtlNtStatusToDosError(NTSTATUS);
}
/**********************************************************************/
@ -118,8 +47,12 @@ fhandler_dev_mem::~fhandler_dev_mem (void)
int
fhandler_dev_mem::open (const char *, int flags, mode_t)
{
if (!load_ntdll_funcs ())
return 0;
if (os_being_run != winNT)
{
set_errno (ENOENT);
debug_printf ("/dev/mem is accessible under NT/W2K only");
return 0;
}
UNICODE_STRING memstr;
RtlInitUnicodeString (&memstr, L"\\device\\physicalmemory");
@ -260,3 +193,41 @@ fhandler_dev_mem::dump ()
{
paranoid_printf("here, fhandler_dev_mem");
}
extern "C" {
LoadDLLinitfunc (ntdll)
{
HANDLE h;
static NO_COPY LONG here = -1L;
while (InterlockedIncrement (&here))
{
InterlockedDecrement (&here);
small_printf ("Multiple tries to read ntdll.dll\n");
Sleep (0);
}
if (ntdll_handle)
/* nothing to do */;
else if ((h = LoadLibrary ("ntdll.dll")) != NULL)
ntdll_handle = h;
else if (!ntdll_handle)
api_fatal ("could not load ntdll.dll, %E");
InterlockedDecrement (&here);
return 0;
}
static void dummy_autoload (void) __attribute__ ((unused));
static void
dummy_autoload (void)
{
LoadDLLinit (ntdll)
LoadDLLfuncEx (NtMapViewOfSection, 40, ntdll, 1)
LoadDLLfuncEx (NtOpenSection, 12, ntdll, 1)
LoadDLLfuncEx (NtUnmapViewOfSection, 8, ntdll, 1)
LoadDLLfuncEx (RtlInitUnicodeString, 8, ntdll, 1)
LoadDLLfuncEx (RtlNtStatusToDosError, 4, ntdll, 1)
}
}