BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG = 0x2,
};
+/*
+ * BiosLinkerFileEntry:
+ *
+ * An internal type used for book-keeping file entries
+ */
+typedef struct BiosLinkerFileEntry {
+ char *name; /* file name */
+ GArray *blob; /* data accosiated with @name */
+} BiosLinkerFileEntry;
+
/*
* bios_linker_loader_init: allocate a new linker object instance.
*
BIOSLinker *linker = g_new(BIOSLinker, 1);
linker->cmd_blob = g_array_new(false, true /* clear */, 1);
+ linker->file_list = g_array_new(false, true /* clear */,
+ sizeof(BiosLinkerFileEntry));
return linker;
}
-/* Free linker wrapper and return the linker commands array. */
-void *bios_linker_loader_cleanup(BIOSLinker *linker)
+/* Free linker wrapper */
+void bios_linker_loader_cleanup(BIOSLinker *linker)
{
- void *cmd_blob = g_array_free(linker->cmd_blob, false);
+ int i;
+ BiosLinkerFileEntry *entry;
+ g_array_free(linker->cmd_blob, true);
+
+ for (i = 0; i < linker->file_list->len; i++) {
+ entry = &g_array_index(linker->file_list, BiosLinkerFileEntry, i);
+ g_free(entry->name);
+ }
+ g_array_free(linker->file_list, true);
g_free(linker);
- return cmd_blob;
+}
+
+static const BiosLinkerFileEntry *
+bios_linker_find_file(const BIOSLinker *linker, const char *name)
+{
+ int i;
+ BiosLinkerFileEntry *entry;
+
+ for (i = 0; i < linker->file_list->len; i++) {
+ entry = &g_array_index(linker->file_list, BiosLinkerFileEntry, i);
+ if (!strcmp(entry->name, name)) {
+ return entry;
+ }
+ }
+ return NULL;
}
/*
* bios_linker_loader_alloc: ask guest to load file into guest memory.
*
* @linker: linker object instance
- * @file: name of the file blob to be loaded
+ * @file_name: name of the file blob to be loaded
+ * @file_blob: pointer to blob corresponding to @file_name
* @alloc_align: required minimal alignment in bytes. Must be a power of 2.
* @alloc_fseg: request allocation in FSEG zone (useful for the RSDP ACPI table)
*
* Note: this command must precede any other linker command using this file.
*/
void bios_linker_loader_alloc(BIOSLinker *linker,
- const char *file,
+ const char *file_name,
+ GArray *file_blob,
uint32_t alloc_align,
bool alloc_fseg)
{
BiosLinkerLoaderEntry entry;
+ BiosLinkerFileEntry file = { g_strdup(file_name), file_blob};
assert(!(alloc_align & (alloc_align - 1)));
+ assert(!bios_linker_find_file(linker, file_name));
+ g_array_append_val(linker->file_list, file);
+
memset(&entry, 0, sizeof entry);
- strncpy(entry.alloc.file, file, sizeof entry.alloc.file - 1);
+ strncpy(entry.alloc.file, file_name, sizeof entry.alloc.file - 1);
entry.command = cpu_to_le32(BIOS_LINKER_LOADER_COMMAND_ALLOCATE);
entry.alloc.align = cpu_to_le32(alloc_align);
entry.alloc.zone = alloc_fseg ? BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG :
}
/*
- * bios_linker_loader_add_checksum: ask guest to add checksum of file data
- * into (same) file at the specified pointer.
+ * bios_linker_loader_add_checksum: ask guest to add checksum of ACPI
+ * table in the specified file at the specified offset.
*
* Checksum calculation simply sums -X for each byte X in the range
* using 8-bit math (i.e. ACPI checksum).
* @linker: linker object instance
* @file: file that includes the checksum to be calculated
* and the data to be checksummed
- * @table: @file blob contents
- * @start, @size: range of data to checksum
- * @checksum: location of the checksum to be patched within file blob
- *
- * Notes:
- * - checksum byte initial value must have been pushed into @table
- * and reside at address @checksum.
- * - @size bytes must have been pushed into @table and reside at address
- * @start.
- * - Guest calculates checksum of specified range of data, result is added to
- * initial value at @checksum into copy of @file in Guest memory.
- * - Range might include the checksum itself.
- * - To avoid confusion, caller must always put 0x0 at @checksum.
- * - @file must be loaded into Guest memory using bios_linker_loader_alloc
+ * @start_offset, @size: range of data in the file to checksum,
+ * relative to the start of file blob
+ * @checksum_offset: location of the checksum to be patched within file blob,
+ * relative to the start of file blob
*/
-void bios_linker_loader_add_checksum(BIOSLinker *linker, const char *file,
- GArray *table,
- void *start, unsigned size,
- uint8_t *checksum)
+void bios_linker_loader_add_checksum(BIOSLinker *linker, const char *file_name,
+ unsigned start_offset, unsigned size,
+ unsigned checksum_offset)
{
BiosLinkerLoaderEntry entry;
- ptrdiff_t checksum_offset = (gchar *)checksum - table->data;
- ptrdiff_t start_offset = (gchar *)start - table->data;
+ const BiosLinkerFileEntry *file = bios_linker_find_file(linker, file_name);
- assert(checksum_offset >= 0);
- assert(start_offset >= 0);
- assert(checksum_offset + 1 <= table->len);
- assert(start_offset + size <= table->len);
- assert(*checksum == 0x0);
+ assert(file);
+ assert(start_offset < file->blob->len);
+ assert(start_offset + size <= file->blob->len);
+ assert(checksum_offset >= start_offset);
+ assert(checksum_offset + 1 <= start_offset + size);
+ *(file->blob->data + checksum_offset) = 0;
memset(&entry, 0, sizeof entry);
- strncpy(entry.cksum.file, file, sizeof entry.cksum.file - 1);
+ strncpy(entry.cksum.file, file_name, sizeof entry.cksum.file - 1);
entry.command = cpu_to_le32(BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM);
entry.cksum.offset = cpu_to_le32(checksum_offset);
entry.cksum.start = cpu_to_le32(start_offset);
}
/*
- * bios_linker_loader_add_pointer: ask guest to add address of source file
- * into destination file at the specified pointer.
+ * bios_linker_loader_add_pointer: ask guest to patch address in
+ * destination file with a pointer to source file
*
* @linker: linker object instance
* @dest_file: destination file that must be changed
+ * @dst_patched_offset: location within destination file blob to be patched
+ * with the pointer to @src_file+@src_offset (i.e. source
+ * blob allocated in guest memory + @src_offset), in bytes
+ * @dst_patched_offset_size: size of the pointer to be patched
+ * at @dst_patched_offset in @dest_file blob, in bytes
* @src_file: source file who's address must be taken
- * @table: @dest_file blob contents array
- * @pointer: location of the pointer to be patched within destination file blob
- * @pointer_size: size of pointer to be patched, in bytes
- *
- * Notes:
- * - @pointer_size bytes must have been pushed into @table
- * and reside at address @pointer.
- * - Guest address is added to initial value at @pointer
- * into copy of @dest_file in Guest memory.
- * e.g. to get start of src_file in guest memory, put 0x0 there
- * to get address of a field at offset 0x10 in src_file, put 0x10 there
- * - Both @dest_file and @src_file must be
- * loaded into Guest memory using bios_linker_loader_alloc
+ * @src_offset: location within source file blob to which
+ * @dest_file+@dst_patched_offset will point to after
+ * firmware's executed ADD_POINTER command
*/
void bios_linker_loader_add_pointer(BIOSLinker *linker,
const char *dest_file,
+ uint32_t dst_patched_offset,
+ uint8_t dst_patched_size,
const char *src_file,
- GArray *table, void *pointer,
- uint8_t pointer_size)
+ uint32_t src_offset)
{
+ uint64_t le_src_offset;
BiosLinkerLoaderEntry entry;
- ptrdiff_t offset = (gchar *)pointer - table->data;
+ const BiosLinkerFileEntry *dst_file =
+ bios_linker_find_file(linker, dest_file);
+ const BiosLinkerFileEntry *source_file =
+ bios_linker_find_file(linker, src_file);
- assert(offset >= 0);
- assert(offset + pointer_size <= table->len);
+ assert(dst_patched_offset < dst_file->blob->len);
+ assert(dst_patched_offset + dst_patched_size <= dst_file->blob->len);
+ assert(src_offset < source_file->blob->len);
memset(&entry, 0, sizeof entry);
strncpy(entry.pointer.dest_file, dest_file,
strncpy(entry.pointer.src_file, src_file,
sizeof entry.pointer.src_file - 1);
entry.command = cpu_to_le32(BIOS_LINKER_LOADER_COMMAND_ADD_POINTER);
- entry.pointer.offset = cpu_to_le32(offset);
- entry.pointer.size = pointer_size;
- assert(pointer_size == 1 || pointer_size == 2 ||
- pointer_size == 4 || pointer_size == 8);
+ entry.pointer.offset = cpu_to_le32(dst_patched_offset);
+ entry.pointer.size = dst_patched_size;
+ assert(dst_patched_size == 1 || dst_patched_size == 2 ||
+ dst_patched_size == 4 || dst_patched_size == 8);
+
+ le_src_offset = cpu_to_le64(src_offset);
+ memcpy(dst_file->blob->data + dst_patched_offset,
+ &le_src_offset, dst_patched_size);
g_array_append_vals(linker->cmd_blob, &entry, sizeof entry);
}
projects / qemu.git / blobdiff