979 lines
28 KiB
C
979 lines
28 KiB
C
/*
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* Win32 virtual memory functions
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*
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* Copyright 1997 Alexandre Julliard
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*/
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#include <assert.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include "winbase.h"
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#include "winerror.h"
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#include "file.h"
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#include "heap.h"
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#include "process.h"
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#include "xmalloc.h"
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#include "stddebug.h"
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#include "debug.h"
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/* File mapping */
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typedef struct
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{
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K32OBJ header;
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DWORD size_high;
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DWORD size_low;
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FILE_OBJECT *file;
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BYTE protect;
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} FILE_MAPPING;
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/* File view */
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typedef struct _FV
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{
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struct _FV *next; /* Next view */
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struct _FV *prev; /* Prev view */
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UINT32 base; /* Base address */
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UINT32 size; /* Size in bytes */
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UINT32 flags; /* Allocation flags */
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FILE_MAPPING *mapping; /* File mapping */
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BYTE protect; /* Protection for all pages at allocation time */
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BYTE prot[1]; /* Protection byte for each page */
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} FILE_VIEW;
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/* Per-page protection byte values */
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#define VPROT_READ 0x01
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#define VPROT_WRITE 0x02
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#define VPROT_EXEC 0x04
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#define VPROT_WRITECOPY 0x08
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#define VPROT_GUARD 0x10
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#define VPROT_NOCACHE 0x20
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#define VPROT_COMMITTED 0x40
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/* Per-view flags */
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#define VFLAG_SYSTEM 0x01
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/* Conversion from VPROT_* to Win32 flags */
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static const BYTE VIRTUAL_Win32Flags[16] =
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{
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PAGE_NOACCESS, /* 0 */
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PAGE_READONLY, /* READ */
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PAGE_READWRITE, /* WRITE */
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PAGE_READWRITE, /* READ | WRITE */
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PAGE_EXECUTE, /* EXEC */
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PAGE_EXECUTE_READ, /* READ | EXEC */
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PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
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PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
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PAGE_WRITECOPY, /* WRITECOPY */
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PAGE_WRITECOPY, /* READ | WRITECOPY */
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PAGE_WRITECOPY, /* WRITE | WRITECOPY */
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PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
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PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
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PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
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PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
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PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
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};
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static FILE_VIEW *VIRTUAL_FirstView;
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static UINT32 page_shift;
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static UINT32 page_mask;
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#define ROUND_ADDR(addr) \
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((UINT32)(addr) & ~page_mask)
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#define ROUND_SIZE(addr,size) \
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(((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
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/***********************************************************************
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* VIRTUAL_DestroyMapping
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*
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* Destroy a FILE_MAPPING object.
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*/
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void VIRTUAL_DestroyMapping( K32OBJ *ptr )
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{
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FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
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assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
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if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
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ptr->type = K32OBJ_UNKNOWN;
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HeapFree( SystemHeap, 0, mapping );
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}
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/***********************************************************************
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* VIRTUAL_GetProtStr
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*/
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static const char *VIRTUAL_GetProtStr( BYTE prot )
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{
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static char buffer[6];
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buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
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buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
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buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
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buffer[3] = (prot & VPROT_WRITE) ?
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((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
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buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
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buffer[5] = 0;
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return buffer;
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}
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/***********************************************************************
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* VIRTUAL_DumpView
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*/
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static void VIRTUAL_DumpView( FILE_VIEW *view )
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{
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UINT32 i, count;
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UINT32 addr = view->base;
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BYTE prot = view->prot[0];
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dprintf_virtual( stddeb, "View: %08x - %08x%s\n",
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view->base, view->base + view->size - 1,
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(view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
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for (count = i = 1; i < view->size >> page_shift; i++, count++)
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{
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if (view->prot[i] == prot) continue;
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dprintf_virtual( stddeb, " %08x - %08x %s\n",
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addr, addr + (count << page_shift) - 1,
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VIRTUAL_GetProtStr(prot) );
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addr += (count << page_shift);
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prot = view->prot[i];
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count = 0;
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}
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if (count)
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dprintf_virtual( stddeb, " %08x - %08x %s\n",
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addr, addr + (count << page_shift) - 1,
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VIRTUAL_GetProtStr(prot) );
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}
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/***********************************************************************
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* VIRTUAL_Dump
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*/
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void VIRTUAL_Dump(void)
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{
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FILE_VIEW *view = VIRTUAL_FirstView;
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dprintf_virtual( stddeb, "\nDump of all virtual memory views:\n\n" );
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while (view)
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{
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VIRTUAL_DumpView( view );
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view = view->next;
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}
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}
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/***********************************************************************
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* VIRTUAL_FindView
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*
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* Find the view containing a given address.
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*/
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static FILE_VIEW *VIRTUAL_FindView( UINT32 addr )
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{
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FILE_VIEW *view = VIRTUAL_FirstView;
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while (view)
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{
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if (view->base > addr) return NULL;
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if (view->base + view->size > addr) return view;
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view = view->next;
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}
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return NULL;
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}
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/***********************************************************************
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* VIRTUAL_CreateView
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*
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* Create a new view and add it in the linked list.
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*/
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static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size,
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UINT32 flags, BYTE vprot )
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{
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FILE_VIEW *view, *prev;
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/* Create the view structure */
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size >>= page_shift;
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view = (FILE_VIEW *)xmalloc( sizeof(*view) + size - 1 );
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view->base = base;
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view->size = size << page_shift;
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view->flags = flags;
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view->protect = vprot;
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memset( view->prot, vprot, size );
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/* Insert it in the linked list */
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if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
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{
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view->next = VIRTUAL_FirstView;
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view->prev = NULL;
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if (view->next) view->next->prev = view;
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VIRTUAL_FirstView = view;
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}
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else
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{
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prev = VIRTUAL_FirstView;
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while (prev->next && (prev->next->base < base)) prev = prev->next;
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view->next = prev->next;
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view->prev = prev;
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if (view->next) view->next->prev = view;
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prev->next = view;
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}
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if (debugging_virtual) VIRTUAL_DumpView( view );
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return view;
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}
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/***********************************************************************
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* VIRTUAL_DeleteView
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*
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* Delete an view.
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*/
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static void VIRTUAL_DeleteView( FILE_VIEW *view )
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{
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munmap( (void *)view->base, view->size );
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if (view->next) view->next->prev = view->prev;
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if (view->prev) view->prev->next = view->next;
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else VIRTUAL_FirstView = view->next;
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free( view );
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}
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/***********************************************************************
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* VIRTUAL_GetUnixProt
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*
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* Convert page protections to protection for mmap/mprotect.
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*/
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static int VIRTUAL_GetUnixProt( BYTE vprot )
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{
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int prot = 0;
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if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
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{
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if (vprot & VPROT_READ) prot |= PROT_READ;
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if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
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if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
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}
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return prot;
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}
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/***********************************************************************
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* VIRTUAL_GetWin32Prot
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*
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* Convert page protections to Win32 flags.
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*/
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static void VIRTUAL_GetWin32Prot( BYTE vprot, DWORD *protect, DWORD *state )
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{
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*protect = VIRTUAL_Win32Flags[vprot & 0x0f];
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if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;
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if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
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if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
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}
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/***********************************************************************
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* VIRTUAL_GetProt
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*
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* Build page protections from Win32 flags.
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*/
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static BYTE VIRTUAL_GetProt( DWORD protect )
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{
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BYTE vprot;
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switch(protect & 0xff)
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{
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case PAGE_READONLY:
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vprot = VPROT_READ;
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break;
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case PAGE_READWRITE:
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vprot = VPROT_READ | VPROT_WRITE;
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break;
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case PAGE_WRITECOPY:
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vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
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break;
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case PAGE_EXECUTE:
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vprot = VPROT_EXEC;
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break;
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case PAGE_EXECUTE_READ:
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vprot = VPROT_EXEC | VPROT_READ;
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break;
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case PAGE_EXECUTE_READWRITE:
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vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
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break;
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case PAGE_EXECUTE_WRITECOPY:
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vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
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break;
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case PAGE_NOACCESS:
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default:
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vprot = 0;
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break;
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}
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if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
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if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
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return vprot;
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}
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/***********************************************************************
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* VIRTUAL_SetProt
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*
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* Change the protection of a range of pages.
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*/
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static BOOL32 VIRTUAL_SetProt( FILE_VIEW *view, UINT32 base,
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UINT32 size, BYTE vprot )
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{
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dprintf_virtual( stddeb, "VIRTUAL_SetProt: %08x-%08x %s\n",
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base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
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if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
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return FALSE; /* FIXME: last error */
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memset( view->prot + ((base - view->base) >> page_shift),
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vprot, size >> page_shift );
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if (debugging_virtual) VIRTUAL_DumpView( view );
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return TRUE;
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}
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/***********************************************************************
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* VIRTUAL_CheckFlags
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*
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* Check that all pages in a range have the given flags.
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*/
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static BOOL32 VIRTUAL_CheckFlags( UINT32 base, UINT32 size, BYTE flags )
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{
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FILE_VIEW *view;
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UINT32 page;
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if (!size) return TRUE;
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if (!(view = VIRTUAL_FindView( base ))) return FALSE;
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if (view->base + view->size < base + size) return FALSE;
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page = (base - view->base) >> page_shift;
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size = ROUND_SIZE( base, size ) >> page_shift;
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while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
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return TRUE;
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}
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/***********************************************************************
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* VIRTUAL_Init
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*/
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BOOL32 VIRTUAL_Init(void)
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{
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SYSTEM_INFO sysinfo;
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GetSystemInfo( &sysinfo );
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page_mask = sysinfo.dwPageSize - 1;
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/* Make sure we have a power of 2 */
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assert( !(sysinfo.dwPageSize & page_mask) );
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page_shift = 0;
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while ((1 << page_shift) != sysinfo.dwPageSize) page_shift++;
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#ifdef linux
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{
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FILE *f = fopen( "/proc/self/maps", "r" );
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if (f)
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{
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char buffer[80];
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while (fgets( buffer, sizeof(buffer), f ))
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{
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int start, end, offset;
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char r, w, x, p;
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BYTE vprot = VPROT_COMMITTED;
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sscanf( buffer, "%x-%x %c%c%c%c %x",
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&start, &end, &r, &w, &x, &p, &offset );
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if (r == 'r') vprot |= VPROT_READ;
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if (w == 'w') vprot |= VPROT_WRITE;
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if (x == 'x') vprot |= VPROT_EXEC;
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if (p == 'p') vprot |= VPROT_WRITECOPY;
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VIRTUAL_CreateView( start, end - start, VFLAG_SYSTEM, vprot );
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}
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fclose( f );
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}
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}
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#endif /* linux */
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return TRUE;
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}
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/***********************************************************************
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* VirtualAlloc (KERNEL32.548)
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*/
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LPVOID VirtualAlloc( LPVOID addr, DWORD size, DWORD type, DWORD protect )
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{
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FILE_VIEW *view;
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UINT32 base, ptr, view_size;
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BYTE vprot;
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dprintf_virtual( stddeb, "VirtualAlloc: %08x %08lx %lx %08lx\n",
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(UINT32)addr, size, type, protect );
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/* Round parameters to a page boundary */
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if (size > 0x7fc00000) /* 2Gb - 4Mb */
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{
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SetLastError( ERROR_OUTOFMEMORY );
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return NULL;
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}
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if (addr)
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{
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if (type & MEM_RESERVE) /* Round down to 64k boundary */
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base = ((UINT32)addr + 0xffff) & ~0xffff;
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else
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base = ROUND_ADDR( addr );
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size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
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if (base + size < base) /* Disallow wrap-around */
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{
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SetLastError( ERROR_INVALID_PARAMETER );
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return NULL;
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}
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}
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else
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{
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base = 0;
|
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size = (size + page_mask) & ~page_mask;
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}
|
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|
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/* Compute the protection flags */
|
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if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
|
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(type & ~(MEM_COMMIT | MEM_RESERVE)))
|
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{
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SetLastError( ERROR_INVALID_PARAMETER );
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return NULL;
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}
|
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if (type & MEM_COMMIT)
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vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
|
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else vprot = 0;
|
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|
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/* Reserve the memory */
|
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|
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if ((type & MEM_RESERVE) || !base)
|
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{
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view_size = size + (base ? 0 : 0x10000);
|
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ptr = (UINT32)FILE_mmap( NULL, (LPVOID)base, 0, view_size, 0, 0,
|
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VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
|
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if (ptr == (UINT32)-1)
|
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{
|
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SetLastError( ERROR_OUTOFMEMORY );
|
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return NULL;
|
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}
|
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if (!base)
|
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{
|
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/* Release the extra memory while keeping the range */
|
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/* starting on a 64k boundary. */
|
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|
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if (ptr & 0xffff0000)
|
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{
|
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munmap( (void *)ptr, 0x10000 - (ptr & 0xffff) );
|
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view_size -= (ptr & 0xffff);
|
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ptr = (ptr + 0x10000) & 0xffff0000;
|
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}
|
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if (view_size > size)
|
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munmap( (void *)(ptr + size), view_size - size );
|
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}
|
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if (!(view = VIRTUAL_CreateView( ptr, size, 0, vprot )))
|
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{
|
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munmap( (void *)ptr, size );
|
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return NULL; /* FIXME: last error */
|
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}
|
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if (debugging_virtual) VIRTUAL_DumpView( view );
|
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return (LPVOID)ptr;
|
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}
|
|
|
|
/* Commit the pages */
|
|
|
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if (!(view = VIRTUAL_FindView( base )) ||
|
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(base + size > view->base + view->size))
|
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{
|
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SetLastError( ERROR_INVALID_PARAMETER );
|
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return NULL;
|
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}
|
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|
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if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
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return (LPVOID)base;
|
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}
|
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|
|
|
|
/***********************************************************************
|
|
* VirtualFree (KERNEL32.550)
|
|
*/
|
|
BOOL32 VirtualFree( LPVOID addr, DWORD size, DWORD type )
|
|
{
|
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FILE_VIEW *view;
|
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UINT32 base;
|
|
|
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dprintf_virtual( stddeb, "VirtualFree: %08x %08lx %lx\n",
|
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(UINT32)addr, size, type );
|
|
|
|
/* Fix the parameters */
|
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|
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size = ROUND_SIZE( addr, size );
|
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base = ROUND_ADDR( addr );
|
|
|
|
if (!(view = VIRTUAL_FindView( base )) ||
|
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(base + size > view->base + view->size))
|
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{
|
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SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
|
|
/* Compute the protection flags */
|
|
|
|
if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
|
|
/* Free the pages */
|
|
|
|
if (type == MEM_RELEASE)
|
|
{
|
|
if (size || (base != view->base))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
VIRTUAL_DeleteView( view );
|
|
return TRUE;
|
|
}
|
|
|
|
/* Decommit the pages */
|
|
|
|
return VIRTUAL_SetProt( view, base, size, 0 );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualLock (KERNEL32.551)
|
|
*/
|
|
BOOL32 VirtualLock( LPVOID addr, DWORD size )
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualUnlock (KERNEL32.556)
|
|
*/
|
|
BOOL32 VirtualUnlock( LPVOID addr, DWORD size )
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualProtect (KERNEL32.552)
|
|
*/
|
|
BOOL32 VirtualProtect( LPVOID addr, DWORD size, DWORD new_prot,
|
|
LPDWORD old_prot )
|
|
{
|
|
FILE_VIEW *view;
|
|
UINT32 base, i;
|
|
BYTE vprot, *p;
|
|
|
|
dprintf_virtual( stddeb, "VirtualProtect: %08x %08lx %08lx\n",
|
|
(UINT32)addr, size, new_prot );
|
|
|
|
/* Fix the parameters */
|
|
|
|
size = ROUND_SIZE( addr, size );
|
|
base = ROUND_ADDR( addr );
|
|
|
|
if (!(view = VIRTUAL_FindView( base )) ||
|
|
(base + size > view->base + view->size))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
|
|
/* Make sure all the pages are committed */
|
|
|
|
p = view->prot + ((base - view->base) >> page_shift);
|
|
for (i = size >> page_shift; i; i--, p++)
|
|
{
|
|
if (!(*p & VPROT_COMMITTED))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
|
|
vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
|
|
return VIRTUAL_SetProt( view, base, size, vprot );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualProtectEx (KERNEL32.553)
|
|
*/
|
|
BOOL32 VirtualProtectEx( HANDLE32 handle, LPVOID addr, DWORD size,
|
|
DWORD new_prot, LPDWORD old_prot )
|
|
{
|
|
BOOL32 ret = FALSE;
|
|
|
|
PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
|
|
if (pdb)
|
|
{
|
|
if (pdb == pCurrentProcess)
|
|
ret = VirtualProtect( addr, size, new_prot, old_prot );
|
|
else
|
|
fprintf(stderr,"Unsupported: VirtualProtectEx on other process\n");
|
|
K32OBJ_DecCount( &pdb->header );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualQuery (KERNEL32.554)
|
|
*/
|
|
BOOL32 VirtualQuery( LPCVOID addr, LPMEMORY_BASIC_INFORMATION info, DWORD len )
|
|
{
|
|
FILE_VIEW *view = VIRTUAL_FirstView;
|
|
UINT32 base = ROUND_ADDR( addr );
|
|
UINT32 alloc_base = 0;
|
|
UINT32 size = 0;
|
|
|
|
/* Find the view containing the address */
|
|
|
|
for (;;)
|
|
{
|
|
if (!view)
|
|
{
|
|
size = 0xffff0000 - alloc_base;
|
|
break;
|
|
}
|
|
if (view->base > base)
|
|
{
|
|
size = view->base - alloc_base;
|
|
view = NULL;
|
|
break;
|
|
}
|
|
if (view->base + view->size > base)
|
|
{
|
|
alloc_base = view->base;
|
|
size = view->size;
|
|
break;
|
|
}
|
|
alloc_base = view->base + view->size;
|
|
view = view->next;
|
|
}
|
|
|
|
/* Fill the info structure */
|
|
|
|
if (!view)
|
|
{
|
|
info->State = MEM_FREE;
|
|
info->Protect = 0;
|
|
info->AllocationProtect = 0;
|
|
info->Type = 0;
|
|
}
|
|
else
|
|
{
|
|
BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
|
|
VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
|
|
for (size = base - alloc_base; size < view->size; size += page_mask+1)
|
|
if (view->prot[size >> page_shift] != vprot) break;
|
|
info->AllocationProtect = view->protect;
|
|
info->Type = MEM_PRIVATE; /* FIXME */
|
|
}
|
|
|
|
info->BaseAddress = (LPVOID)base;
|
|
info->AllocationBase = (LPVOID)alloc_base;
|
|
info->RegionSize = size - (base - alloc_base);
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualQueryEx (KERNEL32.555)
|
|
*/
|
|
BOOL32 VirtualQueryEx( HANDLE32 handle, LPCVOID addr,
|
|
LPMEMORY_BASIC_INFORMATION info, DWORD len )
|
|
{
|
|
BOOL32 ret = FALSE;
|
|
|
|
PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
|
|
if (pdb)
|
|
{
|
|
if (pdb == pCurrentProcess)
|
|
ret = VirtualQuery( addr, info, len );
|
|
else
|
|
fprintf(stderr,"Unsupported: VirtualQueryEx on other process\n");
|
|
K32OBJ_DecCount( &pdb->header );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadReadPtr32 (KERNEL32.354)
|
|
*/
|
|
BOOL32 IsBadReadPtr32( LPCVOID ptr, UINT32 size )
|
|
{
|
|
return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
|
|
VPROT_READ | VPROT_COMMITTED );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadWritePtr32 (KERNEL32.357)
|
|
*/
|
|
BOOL32 IsBadWritePtr32( LPVOID ptr, UINT32 size )
|
|
{
|
|
return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
|
|
VPROT_WRITE | VPROT_COMMITTED );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadHugeReadPtr32 (KERNEL32.352)
|
|
*/
|
|
BOOL32 IsBadHugeReadPtr32( LPCVOID ptr, UINT32 size )
|
|
{
|
|
return IsBadReadPtr32( ptr, size );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadHugeWritePtr32 (KERNEL32.353)
|
|
*/
|
|
BOOL32 IsBadHugeWritePtr32( LPVOID ptr, UINT32 size )
|
|
{
|
|
return IsBadWritePtr32( ptr, size );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadCodePtr32 (KERNEL32.351)
|
|
*/
|
|
BOOL32 IsBadCodePtr32( FARPROC32 ptr )
|
|
{
|
|
return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadStringPtr32A (KERNEL32.355)
|
|
*/
|
|
BOOL32 IsBadStringPtr32A( LPCSTR str, UINT32 max )
|
|
{
|
|
FILE_VIEW *view;
|
|
UINT32 page, count;
|
|
|
|
if (!max) return FALSE;
|
|
if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
|
|
page = ((UINT32)str - view->base) >> page_shift;
|
|
count = page_mask + 1 - ((UINT32)str & page_mask);
|
|
|
|
while (max)
|
|
{
|
|
if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
|
|
(VPROT_READ | VPROT_COMMITTED))
|
|
return TRUE;
|
|
if (count > max) count = max;
|
|
max -= count;
|
|
while (count--) if (!*str++) return FALSE;
|
|
if (++page >= view->size >> page_shift) return TRUE;
|
|
count = page_mask + 1;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadStringPtr32W (KERNEL32.356)
|
|
*/
|
|
BOOL32 IsBadStringPtr32W( LPCWSTR str, UINT32 max )
|
|
{
|
|
FILE_VIEW *view;
|
|
UINT32 page, count;
|
|
|
|
if (!max) return FALSE;
|
|
if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
|
|
page = ((UINT32)str - view->base) >> page_shift;
|
|
count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR);
|
|
|
|
while (max)
|
|
{
|
|
if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
|
|
(VPROT_READ | VPROT_COMMITTED))
|
|
return TRUE;
|
|
if (count > max) count = max;
|
|
max -= count;
|
|
while (count--) if (!*str++) return FALSE;
|
|
if (++page >= view->size >> page_shift) return TRUE;
|
|
count = (page_mask + 1) / sizeof(WCHAR);
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CreateFileMapping32A (KERNEL32.46)
|
|
*/
|
|
HANDLE32 CreateFileMapping32A( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
|
|
DWORD protect, DWORD size_high, DWORD size_low,
|
|
LPCSTR name )
|
|
{
|
|
FILE_MAPPING *mapping = NULL;
|
|
HANDLE32 handle;
|
|
|
|
K32OBJ *obj = K32OBJ_FindName( name );
|
|
if (obj)
|
|
{
|
|
if (obj->type == K32OBJ_MEM_MAPPED_FILE)
|
|
{
|
|
SetLastError( ERROR_ALREADY_EXISTS );
|
|
return PROCESS_AllocHandle( obj, 0 );
|
|
}
|
|
SetLastError( ERROR_DUP_NAME );
|
|
return 0;
|
|
}
|
|
|
|
printf( "CreateFileMapping32A(%x,%p,%08lx,%08lx%08lx,%s)\n",
|
|
hFile, attr, protect, size_high, size_low, name );
|
|
|
|
if (hFile == INVALID_HANDLE_VALUE32)
|
|
{
|
|
if (!size_high && !size_low)
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return 0;
|
|
}
|
|
obj = NULL;
|
|
}
|
|
else /* We have a file */
|
|
{
|
|
BY_HANDLE_FILE_INFORMATION info;
|
|
if (!(obj = PROCESS_GetObjPtr( hFile, K32OBJ_FILE ))) goto error;
|
|
if (!GetFileInformationByHandle( hFile, &info )) goto error;
|
|
if (!size_high && !size_low)
|
|
{
|
|
size_high = info.nFileSizeHigh;
|
|
size_low = info.nFileSizeLow;
|
|
}
|
|
else if ((size_high > info.nFileSizeHigh) ||
|
|
((size_high == info.nFileSizeHigh) &&
|
|
(size_low > info.nFileSizeLow)))
|
|
{
|
|
/* We have to grow the file */
|
|
if (SetFilePointer( hFile, size_low, &size_high,
|
|
FILE_BEGIN ) == 0xffffffff) goto error;
|
|
if (!SetEndOfFile( hFile )) goto error;
|
|
}
|
|
}
|
|
|
|
if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
|
|
mapping->header.type = K32OBJ_MEM_MAPPED_FILE;
|
|
mapping->header.refcount = 1;
|
|
mapping->protect = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
|
|
mapping->size_high = size_high;
|
|
mapping->size_low = size_low;
|
|
mapping->file = (FILE_OBJECT *)obj;
|
|
|
|
handle = PROCESS_AllocHandle( &mapping->header, 0 );
|
|
if (handle != INVALID_HANDLE_VALUE32) return handle;
|
|
|
|
error:
|
|
if (obj) K32OBJ_DecCount( obj );
|
|
if (mapping) HeapFree( SystemHeap, 0, mapping );
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CreateFileMapping32W (KERNEL32.47)
|
|
*/
|
|
HANDLE32 CreateFileMapping32W( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
|
|
DWORD protect, DWORD size_high, DWORD size_low,
|
|
LPCWSTR name )
|
|
{
|
|
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
|
|
HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
|
|
size_high, size_low, nameA );
|
|
HeapFree( GetProcessHeap(), 0, nameA );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* OpenFileMapping32A (KERNEL32.397)
|
|
*/
|
|
HANDLE32 OpenFileMapping32A( DWORD access, BOOL32 inherit, LPCSTR name )
|
|
{
|
|
K32OBJ *obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE );
|
|
if (!obj) return 0;
|
|
return PROCESS_AllocHandle( obj, 0 );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* OpenFileMapping32W (KERNEL32.398)
|
|
*/
|
|
HANDLE32 OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name )
|
|
{
|
|
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
|
|
HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
|
|
HeapFree( GetProcessHeap(), 0, nameA );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* MapViewOfFile (KERNEL32.385)
|
|
*/
|
|
LPVOID MapViewOfFile( HANDLE32 mapping, DWORD access, DWORD offset_high,
|
|
DWORD offset_low, DWORD count )
|
|
{
|
|
return MapViewOfFileEx( mapping, access, offset_high,
|
|
offset_low, count, NULL );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* MapViewOfFileEx (KERNEL32.386)
|
|
*/
|
|
LPVOID MapViewOfFileEx( HANDLE32 handle, DWORD access, DWORD offset_high,
|
|
DWORD offset_low, DWORD count, LPVOID addr )
|
|
{
|
|
FILE_MAPPING *mapping;
|
|
LPVOID ret;
|
|
|
|
if (!(mapping = (FILE_MAPPING *)PROCESS_GetObjPtr( handle,
|
|
K32OBJ_MEM_MAPPED_FILE )))
|
|
return NULL;
|
|
|
|
ret = FILE_mmap(mapping->file, addr, mapping->size_high, mapping->size_low,
|
|
offset_high, offset_low, mapping->protect, MAP_PRIVATE );
|
|
|
|
K32OBJ_DecCount( &mapping->header );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* UnmapViewOfFile (KERNEL32.540)
|
|
*/
|
|
BOOL32 UnmapViewOfFile( LPVOID addr )
|
|
{
|
|
FILE_VIEW *view;
|
|
UINT32 base = ROUND_ADDR( addr );
|
|
if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
VIRTUAL_DeleteView( view );
|
|
return TRUE;
|
|
}
|