From: Vibhav Pant vibhavp@gmail.com
--- dlls/rometadata/Makefile.in | 1 + dlls/rometadata/assembly.c | 255 +++++++++++++++++++++++++++++ dlls/rometadata/main.c | 2 +- dlls/rometadata/mdtables.c | 48 ++++-- dlls/rometadata/rometadatapriv.h | 17 +- dlls/rometadata/tests/rometadata.c | 10 -- 6 files changed, 309 insertions(+), 24 deletions(-) create mode 100644 dlls/rometadata/assembly.c
diff --git a/dlls/rometadata/Makefile.in b/dlls/rometadata/Makefile.in index 52c39ba8f87..29edc10fb16 100644 --- a/dlls/rometadata/Makefile.in +++ b/dlls/rometadata/Makefile.in @@ -3,5 +3,6 @@ IMPORTLIB = rometadata IMPORTS = combase
SOURCES = \ + assembly.c \ main.c \ mdtables.c diff --git a/dlls/rometadata/assembly.c b/dlls/rometadata/assembly.c new file mode 100644 index 00000000000..2b5a92fbfdf --- /dev/null +++ b/dlls/rometadata/assembly.c @@ -0,0 +1,255 @@ +/* + * CIL assembly parser + * + * Copyright 2025 Vibhav Pant + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#include "rometadatapriv.h" + +#include <assert.h> +#include <wine/debug.h> + +WINE_DEFAULT_DEBUG_CHANNEL(rometadata); + +#pragma pack(push, 1) + +#define METADATA_MAGIC ('B' | ('S' << 8) | ('J' << 16) | ('B' << 24)) + +/* ECMA-335 Partition II.24.2.1, "Metadata root" */ +struct metadata_hdr +{ + UINT32 signature; + UINT16 major_version; + UINT16 minor_version; + UINT32 reserved; + UINT32 length; + char version[0]; +}; + +/* ECMA-335 Partition II.24.2.2, "Stream header" */ +struct stream_hdr +{ + UINT32 offset; + UINT32 size; + char name[0]; +}; + +#pragma pack(pop) + +struct metadata_stream +{ + UINT32 size; + const BYTE *start; +}; + +struct assembly +{ + HANDLE file; + HANDLE map; + const BYTE *data; + UINT64 size; + + struct metadata_stream stream_tables; + struct metadata_stream stream_strings; + struct metadata_stream stream_blobs; + struct metadata_stream stream_guids; + struct metadata_stream stream_user_strings; +}; + +static BOOL pe_rva_to_offset(const IMAGE_SECTION_HEADER *sections, UINT32 num_sections, UINT32 rva, UINT32 *offset) +{ + UINT32 i; + + for (i = 0; i < num_sections; i++) + { + if (rva >= sections[i].VirtualAddress && rva < (sections[i].VirtualAddress + sections[i].Misc.VirtualSize)) + { + *offset = rva - sections[i].VirtualAddress + sections[i].PointerToRawData; + return TRUE; + } + } + return FALSE; +} + +static HRESULT assembly_parse_headers(assembly_t *assembly) +{ + const IMAGE_DOS_HEADER *dos_hdr = (IMAGE_DOS_HEADER *)assembly->data; + const IMAGE_SECTION_HEADER *sections; + const IMAGE_NT_HEADERS32 *nt_hdrs; + const IMAGE_COR20_HEADER *cor_hdr; + const struct metadata_hdr *md_hdr; + const BYTE *streams_cur, *md_start; + UINT32 rva, num_sections, offset; + UINT8 num_streams, i; + + if (assembly->size < sizeof(IMAGE_DOS_HEADER) || dos_hdr->e_magic != IMAGE_DOS_SIGNATURE || + assembly->size < (dos_hdr->e_lfanew + sizeof(IMAGE_NT_HEADERS32))) + return E_INVALIDARG; + + nt_hdrs = (IMAGE_NT_HEADERS32 *)(assembly->data + dos_hdr->e_lfanew); + if (!(num_sections = nt_hdrs->FileHeader.NumberOfSections)) return E_INVALIDARG; + switch (nt_hdrs->OptionalHeader.Magic) + { + case IMAGE_NT_OPTIONAL_HDR32_MAGIC: + rva = nt_hdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR].VirtualAddress; + sections = (IMAGE_SECTION_HEADER *)(assembly->data + dos_hdr->e_lfanew + sizeof(IMAGE_NT_HEADERS32)); + break; + case IMAGE_NT_OPTIONAL_HDR64_MAGIC: + { + const IMAGE_NT_HEADERS64 *hdr64 = (IMAGE_NT_HEADERS64 *)(assembly->data + dos_hdr->e_lfanew); + + if (dos_hdr->e_lfanew + sizeof(IMAGE_NT_HEADERS64) > assembly->size) return E_INVALIDARG; + rva = hdr64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR].VirtualAddress; + sections = (IMAGE_SECTION_HEADER *)(assembly->data + dos_hdr->e_lfanew + sizeof(IMAGE_NT_HEADERS64)); + break; + } + default: + return E_INVALIDARG; + } + + if (!pe_rva_to_offset(sections, num_sections, rva, &offset) || offset + sizeof(IMAGE_COR20_HEADER) > assembly->size) + return E_INVALIDARG; + + cor_hdr = (IMAGE_COR20_HEADER *)(assembly->data + offset); + if (cor_hdr->cb != sizeof(IMAGE_COR20_HEADER)) return E_INVALIDARG; + if (!(pe_rva_to_offset(sections, num_sections, cor_hdr->MetaData.VirtualAddress, &offset)) || + offset + sizeof(struct metadata_hdr) > assembly->size) + return E_INVALIDARG; + + md_start = assembly->data + offset; + md_hdr = (struct metadata_hdr *)md_start; + if (md_hdr->signature != METADATA_MAGIC || + offset + offsetof(struct metadata_hdr, version[md_hdr->length]) + sizeof(UINT16) > assembly->size) + return E_INVALIDARG; + + num_streams = *(UINT8 *)(md_start + offsetof(struct metadata_hdr, version[md_hdr->length]) + sizeof(UINT16)); /* Flags */ + streams_cur = md_start + offsetof(struct metadata_hdr, version[md_hdr->length]) + sizeof(UINT16) * 2; /* Flags + Streams */ + + for (i = 0; i < num_streams; i++) + { + const struct stream_hdr *md_stream_hdr = (struct stream_hdr *)streams_cur; + const struct + { + const char *name; + DWORD name_len; + struct metadata_stream *stream; + } streams[] = + { + { "#~", 2, &assembly->stream_tables }, + { "#Strings", 8, &assembly->stream_strings }, + { "#Blob", 5, &assembly->stream_blobs }, + { "#GUID", 5, &assembly->stream_guids }, + { "#US", 3, &assembly->stream_user_strings } + }; + HRESULT hr = E_INVALIDARG; + int j; + + if ((UINT_PTR)(streams_cur - assembly->data) > assembly->size) return E_INVALIDARG; + for (j = 0; j < ARRAY_SIZE(streams); j++) + { + if (!strncmp(streams[j].name, md_stream_hdr->name, streams[j].name_len)) + { + if (md_stream_hdr->offset + md_stream_hdr->size <= assembly->size) + { + streams[j].stream->size = md_stream_hdr->size; + streams[j].stream->start = md_start + md_stream_hdr->offset; + hr = S_OK; + } + break; + } + } + if (FAILED(hr)) return hr; + /* The stream name is padded to the next 4-byte boundary (ECMA-335 Partition II.24.2.2) */ + streams_cur += offsetof(struct stream_hdr, name[(streams[j].name_len + 4) & ~3]); + } + + if (assembly->stream_strings.size) + { + /* IMetaDataTables::GetStringHeapSize returns the string heap size without the nul byte padding. */ + const BYTE *ptr = assembly->stream_strings.start + assembly->stream_strings.size - 1; + ULONG padding; + + for (padding = 0; !ptr[0] && !ptr[-1]; ptr--, padding++) /* nothing */; + assembly->stream_strings.size -= padding; + } + + return S_OK; +} + +HRESULT assembly_open_from_file(const WCHAR *path, assembly_t **ret) +{ + assembly_t *assembly; + HRESULT hr = S_OK; + + TRACE("(%s, %p)\n", debugstr_w(path), ret); + + if (!(assembly = calloc(1, sizeof(*assembly)))) return E_OUTOFMEMORY; + assembly->file = CreateFileW(path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); + if (assembly->file == INVALID_HANDLE_VALUE) + { + hr = HRESULT_FROM_WIN32(GetLastError()); + goto done; + } + if (!(assembly->map = CreateFileMappingW(assembly->file, NULL, PAGE_READONLY, 0, 0, NULL))) + { + hr = HRESULT_FROM_WIN32(GetLastError()); + goto done; + } + if (!(assembly->data = MapViewOfFile(assembly->map, FILE_MAP_READ, 0, 0, 0))) + { + hr = HRESULT_FROM_WIN32(GetLastError()); + goto done; + } + if (!GetFileSizeEx(assembly->file, (LARGE_INTEGER *)&assembly->size)) + { + hr = HRESULT_FROM_WIN32(GetLastError()); + goto done; + } + + hr = assembly_parse_headers(assembly); + +done: + if (FAILED(hr)) + assembly_free(assembly); + else + *ret = assembly; + return hr; +} + +void assembly_free(assembly_t *assembly) +{ + if (assembly->map) UnmapViewOfFile(assembly->map); + CloseHandle(assembly->map); + CloseHandle(assembly->file); + free(assembly); +} + +ULONG assembly_get_heap_size(const assembly_t *assembly, enum heap_type heap) +{ + switch (heap) + { + case HEAP_BLOB: + return assembly->stream_blobs.size; + case HEAP_STRING: + return assembly->stream_strings.size; + case HEAP_GUID: + return assembly->stream_guids.size; + case HEAP_USER_STRING: + return assembly->stream_user_strings.size; + DEFAULT_UNREACHABLE; + } +} \ No newline at end of file diff --git a/dlls/rometadata/main.c b/dlls/rometadata/main.c index 6cded07c11f..346753009a7 100644 --- a/dlls/rometadata/main.c +++ b/dlls/rometadata/main.c @@ -96,7 +96,7 @@ static HRESULT WINAPI MetaDataDispenser_OpenScope(IMetaDataDispenserEx *iface, c FIXME("%p %s %lx %s %p semi-stub!\n", iface, debugstr_w(scope), open_flags, debugstr_guid(riid), obj);
*obj = NULL; - hr = IMetaDataTables_create(&tables); + hr = IMetaDataTables_create(scope, &tables); if (FAILED(hr)) return hr;
diff --git a/dlls/rometadata/mdtables.c b/dlls/rometadata/mdtables.c index 180dbb09b68..9affb80f5bf 100644 --- a/dlls/rometadata/mdtables.c +++ b/dlls/rometadata/mdtables.c @@ -32,6 +32,8 @@ struct metadata_tables { IMetaDataTables IMetaDataTables_iface; LONG ref; + + assembly_t *assembly; };
static inline struct metadata_tables *impl_from_IMetaDataTables(IMetaDataTables *iface) @@ -70,38 +72,53 @@ static ULONG WINAPI tables_Release(IMetaDataTables *iface)
TRACE("(%p)\n", iface);
- if (!ref) free(impl); + if (!ref) + { + assembly_free(impl->assembly); + free(impl); + } return ref; }
+static HRESULT get_heap_size(IMetaDataTables *iface, enum heap_type type, ULONG *size) +{ + struct metadata_tables *impl = impl_from_IMetaDataTables(iface); + *size = assembly_get_heap_size(impl->assembly, type); + return S_OK; +} + static HRESULT WINAPI tables_GetStringHeapSize(IMetaDataTables *iface, ULONG *size) { - FIXME("(%p, %p): stub!\n", iface, size); - return E_NOTIMPL; + TRACE("(%p, %p)\n", iface, size); + return get_heap_size(iface, HEAP_STRING, size); }
static HRESULT WINAPI tables_GetBlobHeapSize(IMetaDataTables *iface, ULONG *size) { - FIXME("(%p, %p): stub!\n", iface, size); - return E_NOTIMPL; + TRACE("(%p, %p)\n", iface, size); + return get_heap_size(iface, HEAP_BLOB, size); }
static HRESULT WINAPI tables_GetGuidHeapSize(IMetaDataTables *iface, ULONG *size) { - FIXME("(%p, %p): stub!\n", iface, size); - return E_NOTIMPL; + TRACE("(%p, %p)\n", iface, size); + return get_heap_size(iface, HEAP_GUID, size); }
static HRESULT WINAPI tables_GetUserStringHeapSize(IMetaDataTables *iface, ULONG *size) { - FIXME("(%p, %p): stub!\n", iface, size); - return E_NOTIMPL; + TRACE("(%p, %p)\n", iface, size); + return get_heap_size(iface, HEAP_USER_STRING, size); }
static HRESULT WINAPI tables_GetNumTables(IMetaDataTables *iface, ULONG *size) { - FIXME("(%p, %p): stub!\n", iface, size); - return E_NOTIMPL; + TRACE("(%p, %p)\n", iface, size); + + /* This returns the number of tables known to the metadata parser, not the number of tables that exist in this + * assembly. */ + *size = 45; + return S_OK; }
static HRESULT WINAPI tables_GetTableIndex(IMetaDataTables *iface, ULONG token, ULONG *idx) @@ -217,11 +234,18 @@ static const struct IMetaDataTablesVtbl tables_vtbl = tables_GetNextUserString, };
-HRESULT IMetaDataTables_create(IMetaDataTables **iface) +HRESULT IMetaDataTables_create(const WCHAR *path, IMetaDataTables **iface) { struct metadata_tables *impl; + HRESULT hr;
if (!(impl = calloc(1, sizeof(*impl)))) return E_OUTOFMEMORY; + if (FAILED(hr = assembly_open_from_file(path, &impl->assembly))) + { + free( impl ); + return hr; + } + impl->IMetaDataTables_iface.lpVtbl = &tables_vtbl; impl->ref = 1; *iface = &impl->IMetaDataTables_iface; diff --git a/dlls/rometadata/rometadatapriv.h b/dlls/rometadata/rometadatapriv.h index e6ff2ada18a..6ca83cefbf6 100644 --- a/dlls/rometadata/rometadatapriv.h +++ b/dlls/rometadata/rometadatapriv.h @@ -19,6 +19,21 @@ #ifndef __WINE_ROMETADATA_PRIVATE__ #define __WINE_ROMETADATA_PRIVATE__
-extern HRESULT IMetaDataTables_create(IMetaDataTables **iface); +#include <rometadataapi.h> + +extern HRESULT IMetaDataTables_create(const WCHAR *path, IMetaDataTables **iface); + +typedef struct assembly assembly_t; +enum heap_type +{ + HEAP_STRING = 0, + HEAP_GUID = 1, + HEAP_BLOB = 2, + HEAP_USER_STRING = 3 +}; + +extern HRESULT assembly_open_from_file(const WCHAR *path, assembly_t **out); +extern void assembly_free(assembly_t *assembly); +extern ULONG assembly_get_heap_size(const assembly_t *assembly, enum heap_type heap);
#endif /* __WINE_ROMETADATA_PRIVATE__ */ diff --git a/dlls/rometadata/tests/rometadata.c b/dlls/rometadata/tests/rometadata.c index c80714671d6..dc4452a3d34 100644 --- a/dlls/rometadata/tests/rometadata.c +++ b/dlls/rometadata/tests/rometadata.c @@ -287,37 +287,27 @@ static void test_MetaDataDispenser_OpenScope(void) IMetaDataDispenser_Release(dispenser);
hr = IMetaDataTables_GetStringHeapSize(md_tables, &val); - todo_wine ok(hr == S_OK, "got hr %#lx\n", hr); - todo_wine ok(val == 329, "got val %lu\n", val);
val = 0; hr = IMetaDataTables_GetBlobHeapSize(md_tables, &val); - todo_wine ok(hr == S_OK, "got hr %#lx\n", hr); - todo_wine ok(val == 156, "got val %lu\n", val);
val = 0; hr = IMetaDataTables_GetGuidHeapSize(md_tables, &val); - todo_wine ok(hr == S_OK, "got hr %#lx\n", hr); - todo_wine ok(val == 16, "got val %lu\n", val);
val = 0; hr = IMetaDataTables_GetUserStringHeapSize(md_tables, &val); - todo_wine ok(hr == S_OK, "got hr %#lx\n", hr); - todo_wine ok(val == 8, "got val %lu\n", val);
val = 0; hr = IMetaDataTables_GetNumTables(md_tables, &val); - todo_wine ok(hr == S_OK, "got hr %#lx\n", hr); - todo_wine ok(val == TABLE_MAX, "got val %lu\n", val);
for (i = 0; i < TABLE_MAX; i++)