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path: root/lib/efi_loader/efi_boottime.c
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Diffstat (limited to 'lib/efi_loader/efi_boottime.c')
-rw-r--r--lib/efi_loader/efi_boottime.c148
1 files changed, 98 insertions, 50 deletions
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index f74f989e0ae..bd8b8a17ae7 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -44,7 +44,8 @@ static bool efi_is_direct_boot = true;
static volatile void *efi_gd, *app_gd;
#endif
-static int entry_count;
+/* 1 if inside U-Boot code, 0 if inside EFI payload code */
+static int entry_count = 1;
static int nesting_level;
/* GUID of the device tree table */
const efi_guid_t efi_guid_fdt = EFI_FDT_GUID;
@@ -1497,15 +1498,18 @@ static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
/**
* efi_setup_loaded_image() - initialize a loaded image
- * @info: loaded image info to be passed to the entry point of the image
- * @obj: internal object associated with the loaded image
- * @device_path: device path of the loaded image
- * @file_path: file path of the loaded image
*
* Initialize a loaded_image_info and loaded_image_info object with correct
* protocols, boot-device, etc.
*
- * Return: status code
+ * In case of an error *handle_ptr and *info_ptr are set to NULL and an error
+ * code is returned.
+ *
+ * @device_path: device path of the loaded image
+ * @file_path: file path of the loaded image
+ * @handle_ptr: handle of the loaded image
+ * @info_ptr: loaded image protocol
+ * Return: status code
*/
efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
struct efi_device_path *file_path,
@@ -1513,8 +1517,12 @@ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
struct efi_loaded_image **info_ptr)
{
efi_status_t ret;
- struct efi_loaded_image *info;
- struct efi_loaded_image_obj *obj;
+ struct efi_loaded_image *info = NULL;
+ struct efi_loaded_image_obj *obj = NULL;
+
+ /* In case of EFI_OUT_OF_RESOURCES avoid illegal free by caller. */
+ *handle_ptr = NULL;
+ *info_ptr = NULL;
info = calloc(1, sizeof(*info));
if (!info)
@@ -1528,11 +1536,6 @@ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
/* Add internal object to object list */
efi_add_handle(&obj->header);
- if (info_ptr)
- *info_ptr = info;
- if (handle_ptr)
- *handle_ptr = obj;
-
info->revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;
info->file_path = file_path;
info->system_table = &systab;
@@ -1578,58 +1581,87 @@ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
goto failure;
#endif
+ if (info_ptr)
+ *info_ptr = info;
+ if (handle_ptr)
+ *handle_ptr = obj;
+
return ret;
failure:
printf("ERROR: Failure to install protocols for loaded image\n");
+ efi_delete_handle(&obj->header);
+ free(info);
return ret;
}
/**
* efi_load_image_from_path() - load an image using a file path
- * @file_path: the path of the image to load
- * @buffer: buffer containing the loaded image
*
- * Return: status code
+ * Read a file into a buffer allocated as EFI_BOOT_SERVICES_DATA. It is the
+ * callers obligation to update the memory type as needed.
+ *
+ * @file_path: the path of the image to load
+ * @buffer: buffer containing the loaded image
+ * @size: size of the loaded image
+ * Return: status code
*/
efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
- void **buffer)
+ void **buffer, efi_uintn_t *size)
{
struct efi_file_info *info = NULL;
struct efi_file_handle *f;
static efi_status_t ret;
+ u64 addr;
efi_uintn_t bs;
+ /* In case of failure nothing is returned */
+ *buffer = NULL;
+ *size = 0;
+
+ /* Open file */
f = efi_file_from_path(file_path);
if (!f)
return EFI_DEVICE_ERROR;
+ /* Get file size */
bs = 0;
EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid,
&bs, info));
- if (ret == EFI_BUFFER_TOO_SMALL) {
- info = malloc(bs);
- EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid,
- &bs, info));
- }
- if (ret != EFI_SUCCESS)
+ if (ret != EFI_BUFFER_TOO_SMALL) {
+ ret = EFI_DEVICE_ERROR;
goto error;
+ }
- ret = efi_allocate_pool(EFI_LOADER_DATA, info->file_size, buffer);
- if (ret)
+ info = malloc(bs);
+ EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid, &bs,
+ info));
+ if (ret != EFI_SUCCESS)
goto error;
+ /*
+ * When reading the file we do not yet know if it contains an
+ * application, a boottime driver, or a runtime driver. So here we
+ * allocate a buffer as EFI_BOOT_SERVICES_DATA. The caller has to
+ * update the reservation according to the image type.
+ */
bs = info->file_size;
- EFI_CALL(ret = f->read(f, &bs, *buffer));
-
-error:
- free(info);
- EFI_CALL(f->close(f));
-
+ ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES,
+ EFI_BOOT_SERVICES_DATA,
+ efi_size_in_pages(bs), &addr);
if (ret != EFI_SUCCESS) {
- efi_free_pool(*buffer);
- *buffer = NULL;
+ ret = EFI_OUT_OF_RESOURCES;
+ goto error;
}
+ /* Read file */
+ EFI_CALL(ret = f->read(f, &bs, (void *)(uintptr_t)addr));
+ if (ret != EFI_SUCCESS)
+ efi_free_pages(addr, efi_size_in_pages(bs));
+ *buffer = (void *)(uintptr_t)addr;
+ *size = bs;
+error:
+ EFI_CALL(f->close(f));
+ free(info);
return ret;
}
@@ -1656,6 +1688,7 @@ static efi_status_t EFIAPI efi_load_image(bool boot_policy,
efi_uintn_t source_size,
efi_handle_t *image_handle)
{
+ struct efi_device_path *dp, *fp;
struct efi_loaded_image *info = NULL;
struct efi_loaded_image_obj **image_obj =
(struct efi_loaded_image_obj **)image_handle;
@@ -1675,36 +1708,51 @@ static efi_status_t EFIAPI efi_load_image(bool boot_policy,
}
if (!source_buffer) {
- struct efi_device_path *dp, *fp;
-
- ret = efi_load_image_from_path(file_path, &source_buffer);
+ ret = efi_load_image_from_path(file_path, &source_buffer,
+ &source_size);
if (ret != EFI_SUCCESS)
- goto failure;
+ goto error;
/*
* split file_path which contains both the device and
* file parts:
*/
efi_dp_split_file_path(file_path, &dp, &fp);
- ret = efi_setup_loaded_image(dp, fp, image_obj, &info);
- if (ret != EFI_SUCCESS)
- goto failure;
} else {
/* In this case, file_path is the "device" path, i.e.
* something like a HARDWARE_DEVICE:MEMORY_MAPPED
*/
- ret = efi_setup_loaded_image(file_path, NULL, image_obj, &info);
+ u64 addr;
+ void *dest_buffer;
+
+ ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES,
+ EFI_RUNTIME_SERVICES_CODE,
+ efi_size_in_pages(source_size), &addr);
if (ret != EFI_SUCCESS)
goto error;
+ dest_buffer = (void *)(uintptr_t)addr;
+ memcpy(dest_buffer, source_buffer, source_size);
+ source_buffer = dest_buffer;
+
+ dp = file_path;
+ fp = NULL;
}
- (*image_obj)->entry = efi_load_pe(*image_obj, source_buffer, info);
- if (!(*image_obj)->entry) {
- ret = EFI_UNSUPPORTED;
- goto failure;
- }
+ ret = efi_setup_loaded_image(dp, fp, image_obj, &info);
+ if (ret != EFI_SUCCESS)
+ goto error_invalid_image;
+ ret = efi_load_pe(*image_obj, source_buffer, info);
+ if (ret != EFI_SUCCESS)
+ goto error_invalid_image;
+ /* Update the type of the allocated memory */
+ efi_add_memory_map((uintptr_t)source_buffer,
+ efi_size_in_pages(source_size),
+ info->image_code_type, false);
info->system_table = &systab;
info->parent_handle = parent_image;
return EFI_EXIT(EFI_SUCCESS);
-failure:
+error_invalid_image:
+ /* The image is invalid. Release all associated resources. */
+ efi_free_pages((uintptr_t)source_buffer,
+ efi_size_in_pages(source_size));
efi_delete_handle(*image_handle);
*image_handle = NULL;
free(info);
@@ -1725,9 +1773,9 @@ error:
*
* Return: status code
*/
-static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
- efi_uintn_t *exit_data_size,
- u16 **exit_data)
+efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
+ efi_uintn_t *exit_data_size,
+ u16 **exit_data)
{
struct efi_loaded_image_obj *image_obj =
(struct efi_loaded_image_obj *)image_handle;
generated by cgit v1.2.3 (git 2.0.4) at 2025-07-25 19:21:19 +0000