1359 lines
39 KiB
C
1359 lines
39 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 <errno.h>
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#include <sys/errno.h>
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#include <fcntl.h>
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#include <unistd.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 "global.h"
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#include "server.h"
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#include "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(virtual)
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#ifndef MS_SYNC
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#define MS_SYNC 0
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#endif
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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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UINT base; /* Base address */
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UINT size; /* Size in bytes */
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UINT flags; /* Allocation flags */
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UINT offset; /* Offset from start of mapped file */
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HANDLE mapping; /* Handle to the file mapping */
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HANDLERPROC handlerProc; /* Fault handler */
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LPVOID handlerArg; /* Fault handler argument */
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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-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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#ifdef __i386__
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/* These are always the same on an i386, and it will be faster this way */
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# define page_mask 0xfff
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# define page_shift 12
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# define granularity_mask 0xffff
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#else
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static UINT page_shift;
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static UINT page_mask;
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static UINT granularity_mask; /* Allocation granularity (usually 64k) */
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#endif /* __i386__ */
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#define ROUND_ADDR(addr) \
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((UINT)(addr) & ~page_mask)
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#define ROUND_SIZE(addr,size) \
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(((UINT)(size) + ((UINT)(addr) & page_mask) + page_mask) & ~page_mask)
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#define VIRTUAL_DEBUG_DUMP_VIEW(view) \
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if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
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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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UINT i, count;
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UINT addr = view->base;
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BYTE prot = view->prot[0];
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DPRINTF( "View: %08x - %08x%s",
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view->base, view->base + view->size - 1,
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(view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
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if (view->mapping)
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DPRINTF( " %d @ %08x\n", view->mapping, view->offset );
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else
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DPRINTF( " (anonymous)\n");
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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( " %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( " %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( "\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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* RETURNS
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* View: Success
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* NULL: Failure
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*/
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static FILE_VIEW *VIRTUAL_FindView(
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UINT addr /* [in] Address */
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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( UINT base, UINT size, UINT offset,
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UINT flags, BYTE vprot,
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HANDLE mapping )
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{
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FILE_VIEW *view, *prev;
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/* Create the view structure */
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assert( !(base & page_mask) );
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assert( !(size & page_mask) );
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size >>= page_shift;
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if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
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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->offset = offset;
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view->mapping = mapping;
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view->protect = vprot;
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view->handlerProc = NULL;
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memset( view->prot, vprot, size );
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/* Duplicate the mapping handle */
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if ((view->mapping != -1) &&
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!DuplicateHandle( GetCurrentProcess(), view->mapping,
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GetCurrentProcess(), &view->mapping,
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0, FALSE, DUPLICATE_SAME_ACCESS ))
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{
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free( view );
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return NULL;
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}
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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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VIRTUAL_DEBUG_DUMP_VIEW( 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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* Deletes a view.
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*
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* RETURNS
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* None
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*/
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static void VIRTUAL_DeleteView(
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FILE_VIEW *view /* [in] View */
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) {
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FILE_munmap( (void *)view->base, 0, 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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if (view->mapping) CloseHandle( view->mapping );
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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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* RETURNS
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* None
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*/
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static void VIRTUAL_GetWin32Prot(
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BYTE vprot, /* [in] Page protection flags */
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DWORD *protect, /* [out] Location to store Win32 protection flags */
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DWORD *state /* [out] Location to store mem state flag */
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) {
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if (protect) {
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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 (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
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}
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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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* RETURNS
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* Value of page protection flags
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*/
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static BYTE VIRTUAL_GetProt(
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DWORD protect /* [in] Win32 protection flags */
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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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* RETURNS
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* TRUE: Success
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* FALSE: Failure
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*/
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static BOOL VIRTUAL_SetProt(
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FILE_VIEW *view, /* [in] Pointer to view */
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UINT base, /* [in] Starting address */
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UINT size, /* [in] Size in bytes */
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BYTE vprot /* [in] Protections to use */
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) {
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TRACE("%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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VIRTUAL_DEBUG_DUMP_VIEW( 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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* RETURNS
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* TRUE: They do
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* FALSE: They do not
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*/
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static BOOL VIRTUAL_CheckFlags(
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UINT base, /* [in] Starting address */
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UINT size, /* [in] Size in bytes */
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BYTE flags /* [in] Flags to check for */
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) {
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FILE_VIEW *view;
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UINT 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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BOOL VIRTUAL_Init(void)
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{
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#ifndef __i386__
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DWORD page_size;
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# ifdef HAVE_GETPAGESIZE
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page_size = getpagesize();
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# else
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# ifdef __svr4__
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page_size = sysconf(_SC_PAGESIZE);
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# else
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# error Cannot get the page size on this platform
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# endif
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# endif
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page_mask = page_size - 1;
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granularity_mask = 0xffff; /* hard-coded for now */
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/* Make sure we have a power of 2 */
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assert( !(page_size & page_mask) );
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page_shift = 0;
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while ((1 << page_shift) != page_size) page_shift++;
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#endif /* !__i386__ */
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#ifdef linux
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{
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/* Do not use stdio here since it may temporarily change the size
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* of some segments (ie libc6 adds 0x1000 per open FILE)
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*/
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int fd = open ("/proc/self/maps", O_RDONLY);
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if (fd >= 0)
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{
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char buffer[512]; /* line might be rather long in 2.1 */
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for (;;)
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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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char * ptr = buffer;
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int count = sizeof(buffer);
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while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
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ptr++;
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if (*ptr != '\n') break;
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*ptr = '\0';
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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, 0,
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VFLAG_SYSTEM, vprot, -1 );
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}
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close (fd);
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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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|
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/***********************************************************************
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* VIRTUAL_GetPageSize
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*/
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DWORD VIRTUAL_GetPageSize(void)
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{
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return 1 << page_shift;
|
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}
|
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|
|
|
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/***********************************************************************
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* VIRTUAL_GetGranularity
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*/
|
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DWORD VIRTUAL_GetGranularity(void)
|
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{
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return granularity_mask + 1;
|
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}
|
|
|
|
|
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/***********************************************************************
|
|
* VIRTUAL_SetFaultHandler
|
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*/
|
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BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
|
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{
|
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FILE_VIEW *view;
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if (!(view = VIRTUAL_FindView((UINT)addr))) return FALSE;
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view->handlerProc = proc;
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view->handlerArg = arg;
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return TRUE;
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}
|
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|
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/***********************************************************************
|
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* VIRTUAL_HandleFault
|
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*/
|
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BOOL VIRTUAL_HandleFault( LPCVOID addr )
|
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{
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FILE_VIEW *view = VIRTUAL_FindView((UINT)addr);
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|
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if (view && view->handlerProc)
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return view->handlerProc(view->handlerArg, addr);
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return FALSE;
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}
|
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|
|
|
|
/***********************************************************************
|
|
* VirtualAlloc (KERNEL32.548)
|
|
* Reserves or commits a region of pages in virtual address space
|
|
*
|
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* RETURNS
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|
* Base address of allocated region of pages
|
|
* NULL: Failure
|
|
*/
|
|
LPVOID WINAPI VirtualAlloc(
|
|
LPVOID addr, /* [in] Address of region to reserve or commit */
|
|
DWORD size, /* [in] Size of region */
|
|
DWORD type, /* [in] Type of allocation */
|
|
DWORD protect /* [in] Type of access protection */
|
|
) {
|
|
FILE_VIEW *view;
|
|
UINT base, ptr, view_size;
|
|
BYTE vprot;
|
|
|
|
TRACE("%08x %08lx %lx %08lx\n",
|
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(UINT)addr, size, type, protect );
|
|
|
|
/* Round parameters to a page boundary */
|
|
|
|
if (size > 0x7fc00000) /* 2Gb - 4Mb */
|
|
{
|
|
SetLastError( ERROR_OUTOFMEMORY );
|
|
return NULL;
|
|
}
|
|
if (addr)
|
|
{
|
|
if (type & MEM_RESERVE) /* Round down to 64k boundary */
|
|
base = ((UINT)addr + granularity_mask) & ~granularity_mask;
|
|
else
|
|
base = ROUND_ADDR( addr );
|
|
size = (((UINT)addr + size + page_mask) & ~page_mask) - base;
|
|
if (base + size < base) /* Disallow wrap-around */
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
base = 0;
|
|
size = (size + page_mask) & ~page_mask;
|
|
}
|
|
|
|
if (type & MEM_TOP_DOWN) {
|
|
/* FIXME: MEM_TOP_DOWN allocates the largest possible address.
|
|
* Is there _ANY_ way to do it with UNIX mmap()?
|
|
*/
|
|
WARN("MEM_TOP_DOWN ignored\n");
|
|
type &= ~MEM_TOP_DOWN;
|
|
}
|
|
/* Compute the protection flags */
|
|
|
|
if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
|
|
(type & ~(MEM_COMMIT | MEM_RESERVE)))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return NULL;
|
|
}
|
|
if (type & MEM_COMMIT)
|
|
vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
|
|
else vprot = 0;
|
|
|
|
/* Reserve the memory */
|
|
|
|
if ((type & MEM_RESERVE) || !base)
|
|
{
|
|
view_size = size + (base ? 0 : granularity_mask + 1);
|
|
ptr = (UINT)FILE_dommap( -1, (LPVOID)base, 0, view_size, 0, 0,
|
|
VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
|
|
if (ptr == (UINT)-1)
|
|
{
|
|
SetLastError( ERROR_OUTOFMEMORY );
|
|
return NULL;
|
|
}
|
|
if (!base)
|
|
{
|
|
/* Release the extra memory while keeping the range */
|
|
/* starting on a 64k boundary. */
|
|
|
|
if (ptr & granularity_mask)
|
|
{
|
|
UINT extra = granularity_mask + 1 - (ptr & granularity_mask);
|
|
FILE_munmap( (void *)ptr, 0, extra );
|
|
ptr += extra;
|
|
view_size -= extra;
|
|
}
|
|
if (view_size > size)
|
|
FILE_munmap( (void *)(ptr + size), 0, view_size - size );
|
|
}
|
|
else if (ptr != base)
|
|
{
|
|
/* We couldn't get the address we wanted */
|
|
FILE_munmap( (void *)ptr, 0, view_size );
|
|
SetLastError( ERROR_INVALID_ADDRESS );
|
|
return NULL;
|
|
}
|
|
if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, -1 )))
|
|
{
|
|
FILE_munmap( (void *)ptr, 0, size );
|
|
SetLastError( ERROR_OUTOFMEMORY );
|
|
return NULL;
|
|
}
|
|
VIRTUAL_DEBUG_DUMP_VIEW( view );
|
|
return (LPVOID)ptr;
|
|
}
|
|
|
|
/* Commit the pages */
|
|
|
|
if (!(view = VIRTUAL_FindView( base )) ||
|
|
(base + size > view->base + view->size))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return NULL;
|
|
}
|
|
|
|
if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
|
|
return (LPVOID)base;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualFree (KERNEL32.550)
|
|
* Release or decommits a region of pages in virtual address space.
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*/
|
|
BOOL WINAPI VirtualFree(
|
|
LPVOID addr, /* [in] Address of region of committed pages */
|
|
DWORD size, /* [in] Size of region */
|
|
DWORD type /* [in] Type of operation */
|
|
) {
|
|
FILE_VIEW *view;
|
|
UINT base;
|
|
|
|
TRACE("%08x %08lx %lx\n",
|
|
(UINT)addr, size, type );
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* 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)
|
|
* Locks the specified region of virtual address space
|
|
*
|
|
* NOTE
|
|
* Always returns TRUE
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*/
|
|
BOOL WINAPI VirtualLock(
|
|
LPVOID addr, /* [in] Address of first byte of range to lock */
|
|
DWORD size /* [in] Number of bytes in range to lock */
|
|
) {
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualUnlock (KERNEL32.556)
|
|
* Unlocks a range of pages in the virtual address space
|
|
*
|
|
* NOTE
|
|
* Always returns TRUE
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*/
|
|
BOOL WINAPI VirtualUnlock(
|
|
LPVOID addr, /* [in] Address of first byte of range */
|
|
DWORD size /* [in] Number of bytes in range */
|
|
) {
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualProtect (KERNEL32.552)
|
|
* Changes the access protection on a region of committed pages
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*/
|
|
BOOL WINAPI VirtualProtect(
|
|
LPVOID addr, /* [in] Address of region of committed pages */
|
|
DWORD size, /* [in] Size of region */
|
|
DWORD new_prot, /* [in] Desired access protection */
|
|
LPDWORD old_prot /* [out] Address of variable to get old protection */
|
|
) {
|
|
FILE_VIEW *view;
|
|
UINT base, i;
|
|
BYTE vprot, *p;
|
|
|
|
TRACE("%08x %08lx %08lx\n",
|
|
(UINT)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)
|
|
* Changes the access protection on a region of committed pages in the
|
|
* virtual address space of a specified process
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*/
|
|
BOOL WINAPI VirtualProtectEx(
|
|
HANDLE handle, /* [in] Handle of process */
|
|
LPVOID addr, /* [in] Address of region of committed pages */
|
|
DWORD size, /* [in] Size of region */
|
|
DWORD new_prot, /* [in] Desired access protection */
|
|
LPDWORD old_prot /* [out] Address of variable to get old protection */ )
|
|
{
|
|
if (PROCESS_IsCurrent( handle ))
|
|
return VirtualProtect( addr, size, new_prot, old_prot );
|
|
ERR("Unsupported on other process\n");
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualQuery (KERNEL32.554)
|
|
* Provides info about a range of pages in virtual address space
|
|
*
|
|
* RETURNS
|
|
* Number of bytes returned in information buffer
|
|
*/
|
|
DWORD WINAPI VirtualQuery(
|
|
LPCVOID addr, /* [in] Address of region */
|
|
LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
|
|
DWORD len /* [in] Size of buffer */
|
|
) {
|
|
FILE_VIEW *view = VIRTUAL_FirstView;
|
|
UINT base = ROUND_ADDR( addr );
|
|
UINT alloc_base = 0;
|
|
UINT 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 sizeof(*info);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* VirtualQueryEx (KERNEL32.555)
|
|
* Provides info about a range of pages in virtual address space of a
|
|
* specified process
|
|
*
|
|
* RETURNS
|
|
* Number of bytes returned in information buffer
|
|
*/
|
|
DWORD WINAPI VirtualQueryEx(
|
|
HANDLE handle, /* [in] Handle of process */
|
|
LPCVOID addr, /* [in] Address of region */
|
|
LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
|
|
DWORD len /* [in] Size of buffer */ )
|
|
{
|
|
if (PROCESS_IsCurrent( handle ))
|
|
return VirtualQuery( addr, info, len );
|
|
ERR("Unsupported on other process\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadReadPtr32 (KERNEL32.354)
|
|
*
|
|
* RETURNS
|
|
* FALSE: Process has read access to entire block
|
|
* TRUE: Otherwise
|
|
*/
|
|
BOOL WINAPI IsBadReadPtr(
|
|
LPCVOID ptr, /* Address of memory block */
|
|
UINT size /* Size of block */
|
|
) {
|
|
return !VIRTUAL_CheckFlags( (UINT)ptr, size,
|
|
VPROT_READ | VPROT_COMMITTED );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadWritePtr32 (KERNEL32.357)
|
|
*
|
|
* RETURNS
|
|
* FALSE: Process has write access to entire block
|
|
* TRUE: Otherwise
|
|
*/
|
|
BOOL WINAPI IsBadWritePtr(
|
|
LPVOID ptr, /* [in] Address of memory block */
|
|
UINT size /* [in] Size of block in bytes */
|
|
) {
|
|
return !VIRTUAL_CheckFlags( (UINT)ptr, size,
|
|
VPROT_WRITE | VPROT_COMMITTED );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadHugeReadPtr32 (KERNEL32.352)
|
|
* RETURNS
|
|
* FALSE: Process has read access to entire block
|
|
* TRUE: Otherwise
|
|
*/
|
|
BOOL WINAPI IsBadHugeReadPtr(
|
|
LPCVOID ptr, /* [in] Address of memory block */
|
|
UINT size /* [in] Size of block */
|
|
) {
|
|
return IsBadReadPtr( ptr, size );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadHugeWritePtr32 (KERNEL32.353)
|
|
* RETURNS
|
|
* FALSE: Process has write access to entire block
|
|
* TRUE: Otherwise
|
|
*/
|
|
BOOL WINAPI IsBadHugeWritePtr(
|
|
LPVOID ptr, /* [in] Address of memory block */
|
|
UINT size /* [in] Size of block */
|
|
) {
|
|
return IsBadWritePtr( ptr, size );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadCodePtr32 (KERNEL32.351)
|
|
*
|
|
* RETURNS
|
|
* FALSE: Process has read access to specified memory
|
|
* TRUE: Otherwise
|
|
*/
|
|
BOOL WINAPI IsBadCodePtr(
|
|
FARPROC ptr /* [in] Address of function */
|
|
) {
|
|
return !VIRTUAL_CheckFlags( (UINT)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadStringPtr32A (KERNEL32.355)
|
|
*
|
|
* RETURNS
|
|
* FALSE: Read access to all bytes in string
|
|
* TRUE: Else
|
|
*/
|
|
BOOL WINAPI IsBadStringPtrA(
|
|
LPCSTR str, /* [in] Address of string */
|
|
UINT max /* [in] Maximum size of string */
|
|
) {
|
|
FILE_VIEW *view;
|
|
UINT page, count;
|
|
|
|
if (!max) return FALSE;
|
|
if (!(view = VIRTUAL_FindView( (UINT)str ))) return TRUE;
|
|
page = ((UINT)str - view->base) >> page_shift;
|
|
count = page_mask + 1 - ((UINT)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)
|
|
* See IsBadStringPtr32A
|
|
*/
|
|
BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
|
|
{
|
|
FILE_VIEW *view;
|
|
UINT page, count;
|
|
|
|
if (!max) return FALSE;
|
|
if (!(view = VIRTUAL_FindView( (UINT)str ))) return TRUE;
|
|
page = ((UINT)str - view->base) >> page_shift;
|
|
count = (page_mask + 1 - ((UINT)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)
|
|
* Creates a named or unnamed file-mapping object for the specified file
|
|
*
|
|
* RETURNS
|
|
* Handle: Success
|
|
* 0: Mapping object does not exist
|
|
* NULL: Failure
|
|
*/
|
|
HANDLE WINAPI CreateFileMappingA(
|
|
HFILE hFile, /* [in] Handle of file to map */
|
|
SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
|
|
DWORD protect, /* [in] Protection for mapping object */
|
|
DWORD size_high, /* [in] High-order 32 bits of object size */
|
|
DWORD size_low, /* [in] Low-order 32 bits of object size */
|
|
LPCSTR name /* [in] Name of file-mapping object */ )
|
|
{
|
|
struct create_mapping_request req;
|
|
struct create_mapping_reply reply;
|
|
BYTE vprot;
|
|
|
|
/* Check parameters */
|
|
|
|
TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
|
|
hFile, sa, protect, size_high, size_low, debugstr_a(name) );
|
|
|
|
vprot = VIRTUAL_GetProt( protect );
|
|
if (protect & SEC_RESERVE)
|
|
{
|
|
if (hFile != INVALID_HANDLE_VALUE)
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return 0;
|
|
}
|
|
}
|
|
else vprot |= VPROT_COMMITTED;
|
|
if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
|
|
|
|
/* Create the server object */
|
|
|
|
if (!name) name = "";
|
|
req.handle = hFile;
|
|
req.size_high = size_high;
|
|
req.size_low = size_low;
|
|
req.protect = vprot;
|
|
req.inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
|
|
CLIENT_SendRequest( REQ_CREATE_MAPPING, -1, 2,
|
|
&req, sizeof(req),
|
|
name, strlen(name) + 1 );
|
|
SetLastError(0);
|
|
CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
|
|
if (reply.handle == -1) return 0;
|
|
return reply.handle;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* CreateFileMapping32W (KERNEL32.47)
|
|
* See CreateFileMapping32A
|
|
*/
|
|
HANDLE WINAPI CreateFileMappingW( HFILE hFile, LPSECURITY_ATTRIBUTES attr,
|
|
DWORD protect, DWORD size_high,
|
|
DWORD size_low, LPCWSTR name )
|
|
{
|
|
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
|
|
HANDLE ret = CreateFileMappingA( hFile, attr, protect,
|
|
size_high, size_low, nameA );
|
|
HeapFree( GetProcessHeap(), 0, nameA );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* OpenFileMapping32A (KERNEL32.397)
|
|
* Opens a named file-mapping object.
|
|
*
|
|
* RETURNS
|
|
* Handle: Success
|
|
* NULL: Failure
|
|
*/
|
|
HANDLE WINAPI OpenFileMappingA(
|
|
DWORD access, /* [in] Access mode */
|
|
BOOL inherit, /* [in] Inherit flag */
|
|
LPCSTR name ) /* [in] Name of file-mapping object */
|
|
{
|
|
struct open_mapping_request req;
|
|
struct open_mapping_reply reply;
|
|
int len = name ? strlen(name) + 1 : 0;
|
|
|
|
req.access = access;
|
|
req.inherit = inherit;
|
|
CLIENT_SendRequest( REQ_OPEN_MAPPING, -1, 2, &req, sizeof(req), name, len );
|
|
CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
|
|
if (reply.handle == -1) return 0; /* must return 0 on failure, not -1 */
|
|
return reply.handle;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* OpenFileMapping32W (KERNEL32.398)
|
|
* See OpenFileMapping32A
|
|
*/
|
|
HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
|
|
{
|
|
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
|
|
HANDLE ret = OpenFileMappingA( access, inherit, nameA );
|
|
HeapFree( GetProcessHeap(), 0, nameA );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* MapViewOfFile (KERNEL32.385)
|
|
* Maps a view of a file into the address space
|
|
*
|
|
* RETURNS
|
|
* Starting address of mapped view
|
|
* NULL: Failure
|
|
*/
|
|
LPVOID WINAPI MapViewOfFile(
|
|
HANDLE mapping, /* [in] File-mapping object to map */
|
|
DWORD access, /* [in] Access mode */
|
|
DWORD offset_high, /* [in] High-order 32 bits of file offset */
|
|
DWORD offset_low, /* [in] Low-order 32 bits of file offset */
|
|
DWORD count /* [in] Number of bytes to map */
|
|
) {
|
|
return MapViewOfFileEx( mapping, access, offset_high,
|
|
offset_low, count, NULL );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* MapViewOfFileEx (KERNEL32.386)
|
|
* Maps a view of a file into the address space
|
|
*
|
|
* RETURNS
|
|
* Starting address of mapped view
|
|
* NULL: Failure
|
|
*/
|
|
LPVOID WINAPI MapViewOfFileEx(
|
|
HANDLE handle, /* [in] File-mapping object to map */
|
|
DWORD access, /* [in] Access mode */
|
|
DWORD offset_high, /* [in] High-order 32 bits of file offset */
|
|
DWORD offset_low, /* [in] Low-order 32 bits of file offset */
|
|
DWORD count, /* [in] Number of bytes to map */
|
|
LPVOID addr /* [in] Suggested starting address for mapped view */
|
|
) {
|
|
FILE_VIEW *view;
|
|
UINT ptr = (UINT)-1, size = 0;
|
|
int flags = MAP_PRIVATE;
|
|
int unix_handle = -1;
|
|
struct get_mapping_info_request req;
|
|
struct get_mapping_info_reply info;
|
|
|
|
/* Check parameters */
|
|
|
|
if ((offset_low & granularity_mask) ||
|
|
(addr && ((UINT)addr & granularity_mask)))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return NULL;
|
|
}
|
|
|
|
req.handle = handle;
|
|
CLIENT_SendRequest( REQ_GET_MAPPING_INFO, -1, 1, &req, sizeof(req) );
|
|
if (CLIENT_WaitSimpleReply( &info, sizeof(info), &unix_handle ))
|
|
goto error;
|
|
|
|
if (info.size_high || offset_high)
|
|
ERR("Offsets larger than 4Gb not supported\n");
|
|
|
|
if ((offset_low >= info.size_low) ||
|
|
(count > info.size_low - offset_low))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
goto error;
|
|
}
|
|
if (count) size = ROUND_SIZE( offset_low, count );
|
|
else size = info.size_low - offset_low;
|
|
|
|
switch(access)
|
|
{
|
|
case FILE_MAP_ALL_ACCESS:
|
|
case FILE_MAP_WRITE:
|
|
case FILE_MAP_WRITE | FILE_MAP_READ:
|
|
if (!(info.protect & VPROT_WRITE))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
goto error;
|
|
}
|
|
flags = MAP_SHARED;
|
|
/* fall through */
|
|
case FILE_MAP_READ:
|
|
case FILE_MAP_COPY:
|
|
case FILE_MAP_COPY | FILE_MAP_READ:
|
|
if (info.protect & VPROT_READ) break;
|
|
/* fall through */
|
|
default:
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
goto error;
|
|
}
|
|
|
|
/* Map the file */
|
|
|
|
TRACE("handle=%x size=%x offset=%lx\n",
|
|
handle, size, offset_low );
|
|
|
|
ptr = (UINT)FILE_dommap( unix_handle,
|
|
addr, 0, size, 0, offset_low,
|
|
VIRTUAL_GetUnixProt( info.protect ),
|
|
flags );
|
|
if (ptr == (UINT)-1) {
|
|
/* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
|
|
* Platform Differences":
|
|
* Windows NT: ERROR_INVALID_PARAMETER
|
|
* Windows 95: ERROR_INVALID_ADDRESS.
|
|
* FIXME: So should we add a module dependend check here? -MM
|
|
*/
|
|
if (errno==ENOMEM)
|
|
SetLastError( ERROR_OUTOFMEMORY );
|
|
else
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
goto error;
|
|
}
|
|
|
|
if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
|
|
info.protect, handle )))
|
|
{
|
|
SetLastError( ERROR_OUTOFMEMORY );
|
|
goto error;
|
|
}
|
|
if (unix_handle != -1) close( unix_handle );
|
|
return (LPVOID)ptr;
|
|
|
|
error:
|
|
if (unix_handle != -1) close( unix_handle );
|
|
if (ptr != (UINT)-1) FILE_munmap( (void *)ptr, 0, size );
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* FlushViewOfFile (KERNEL32.262)
|
|
* Writes to the disk a byte range within a mapped view of a file
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*/
|
|
BOOL WINAPI FlushViewOfFile(
|
|
LPCVOID base, /* [in] Start address of byte range to flush */
|
|
DWORD cbFlush /* [in] Number of bytes in range */
|
|
) {
|
|
FILE_VIEW *view;
|
|
UINT addr = ROUND_ADDR( base );
|
|
|
|
TRACE("FlushViewOfFile at %p for %ld bytes\n",
|
|
base, cbFlush );
|
|
|
|
if (!(view = VIRTUAL_FindView( addr )))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
if (!cbFlush) cbFlush = view->size;
|
|
if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* UnmapViewOfFile (KERNEL32.540)
|
|
* Unmaps a mapped view of a file.
|
|
*
|
|
* NOTES
|
|
* Should addr be an LPCVOID?
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*/
|
|
BOOL WINAPI UnmapViewOfFile(
|
|
LPVOID addr /* [in] Address where mapped view begins */
|
|
) {
|
|
FILE_VIEW *view;
|
|
UINT base = ROUND_ADDR( addr );
|
|
if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
VIRTUAL_DeleteView( view );
|
|
return TRUE;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* VIRTUAL_MapFileW
|
|
*
|
|
* Helper function to map a file to memory:
|
|
* name - file name
|
|
* [RETURN] ptr - pointer to mapped file
|
|
*/
|
|
LPVOID VIRTUAL_MapFileW( LPCWSTR name )
|
|
{
|
|
HANDLE hFile, hMapping;
|
|
LPVOID ptr = NULL;
|
|
|
|
hFile = CreateFileW( name, GENERIC_READ, FILE_SHARE_READ, NULL,
|
|
OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, 0);
|
|
if (hFile != INVALID_HANDLE_VALUE)
|
|
{
|
|
hMapping = CreateFileMappingA( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
|
|
CloseHandle( hFile );
|
|
if (hMapping)
|
|
{
|
|
ptr = MapViewOfFile( hMapping, FILE_MAP_READ, 0, 0, 0 );
|
|
CloseHandle( hMapping );
|
|
}
|
|
}
|
|
return ptr;
|
|
}
|