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Support mapping non page-aligned binaries for SEC_IMAGE mappings.

This commit is contained in:
Alexandre Julliard 2005-01-04 12:04:06 +00:00
parent 2835633789
commit 646ab89f0a
2 changed files with 48 additions and 8 deletions
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47
dlls/ntdll/virtual.c
View File

@ -882,6 +882,41 @@ static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, DWORD total_size
goto error;
}
/* check for non page-aligned binary */
if (nt->OptionalHeader.SectionAlignment <= page_mask)
{
/* unaligned sections, this happens for native subsystem binaries */
/* in that case Windows simply maps in the whole file */
if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
removable ) != STATUS_SUCCESS) goto error;
/* check that all sections are loaded at the right offset */
for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
{
if (sec[i].VirtualAddress != sec[i].PointerToRawData)
goto error; /* Windows refuses to load in that case too */
}
/* set the image protections */
VIRTUAL_SetProt( view, ptr, total_size,
VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
/* perform relocations if necessary */
/* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
if (ptr != base)
{
const IMAGE_DATA_DIRECTORY *relocs;
relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
if (relocs->VirtualAddress && relocs->Size)
do_relocations( ptr, relocs, ptr - base, total_size );
}
goto done;
}
/* map all the sections */
for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
@ -994,11 +1029,6 @@ static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, DWORD total_size
}
}
if (!removable) /* don't keep handle open on removable media */
NtDuplicateObject( GetCurrentProcess(), hmapping,
GetCurrentProcess(), &view->mapping,
0, 0, DUPLICATE_SAME_ACCESS );
/* set the image protections */
sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
@ -1011,6 +1041,13 @@ static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, DWORD total_size
if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
}
done:
if (!removable) /* don't keep handle open on removable media */
NtDuplicateObject( GetCurrentProcess(), hmapping,
GetCurrentProcess(), &view->mapping,
0, 0, DUPLICATE_SAME_ACCESS );
RtlLeaveCriticalSection( &csVirtual );
*addr_ptr = ptr;

9
server/mapping.c
View File

@ -103,8 +103,10 @@ static void init_page_size(void)
#define ROUND_ADDR(addr) \
((int)(addr) & ~page_mask)
#define ROUND_SIZE(addr,size) \
(((int)(size) + ((int)(addr) & page_mask) + page_mask) & ~page_mask)
#define ROUND_SIZE_MASK(addr,size,mask) \
(((int)(size) + ((int)(addr) & (mask)) + (mask)) & ~(mask))
#define ROUND_SIZE(addr,size) ROUND_SIZE_MASK( addr, size, page_mask )
/* find the shared PE mapping for a given mapping */
@ -236,7 +238,8 @@ static int get_image_params( struct mapping *mapping )
mapping->size_low = ROUND_SIZE( 0, nt.OptionalHeader.SizeOfImage );
mapping->size_high = 0;
mapping->base = (void *)nt.OptionalHeader.ImageBase;
mapping->header_size = ROUND_SIZE( mapping->base, nt.OptionalHeader.SizeOfHeaders );
mapping->header_size = ROUND_SIZE_MASK( mapping->base, nt.OptionalHeader.SizeOfHeaders,
nt.OptionalHeader.SectionAlignment - 1 );
mapping->protect = VPROT_IMAGE;
/* sanity check */