[U-Boot] [PATCH v2 17/21] efi_loader: set loaded image code/data type properly

Rob Clark
2017-09-10T11:21:43Z

These should be set according to the image type. Shell.efi and SCT.efi
use these fields to determine what sort of image they are loading.

Signed-off-by: Rob Clark <robdclark@gmail.com>
---
include/pe.h | 6 ++++++
lib/efi_loader/efi_image_loader.c | 22 ++++++++++++++++++++++
2 files changed, 28 insertions(+)

diff --git a/include/pe.h b/include/pe.h
index deb35a0ea4..4ef3e92efa 100644
--- a/include/pe.h
+++ b/include/pe.h
@@ -62,6 +62,12 @@ typedef struct _IMAGE_DATA_DIRECTORY {

#define IMAGE_NUMBEROF_DIRECTORY_ENTRIES 16

+/* PE32+ Subsystem type for EFI images */
+#define IMAGE_SUBSYSTEM_EFI_APPLICATION 10
+#define IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER 11
+#define IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER 12
+#define IMAGE_SUBSYSTEM_SAL_RUNTIME_DRIVER 13
+
typedef struct _IMAGE_OPTIONAL_HEADER64 {
uint16_t Magic; /* 0x20b */
uint8_t MajorLinkerVersion;
diff --git a/lib/efi_loader/efi_image_loader.c b/lib/efi_loader/efi_image_loader.c
index 242e6a504b..af29cc4f04 100644
--- a/lib/efi_loader/efi_image_loader.c
+++ b/lib/efi_loader/efi_image_loader.c
@@ -94,6 +94,7 @@ void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info)
unsigned long virt_size = 0;
bool can_run_nt64 = true;
bool can_run_nt32 = true;
+ uint16_t image_type;

#if defined(CONFIG_ARM64)
can_run_nt32 = false;
@@ -139,6 +140,7 @@ void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info)
entry = efi_reloc + opt->AddressOfEntryPoint;
rel_size = opt->DataDirectory[rel_idx].Size;
rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
+ image_type = opt->Subsystem;
} else if (can_run_nt32 &&
(nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC)) {
IMAGE_OPTIONAL_HEADER32 *opt = &nt->OptionalHeader;
@@ -152,12 +154,32 @@ void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info)
entry = efi_reloc + opt->AddressOfEntryPoint;
rel_size = opt->DataDirectory[rel_idx].Size;
rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
+ image_type = opt->Subsystem;
} else {
printf("%s: Invalid optional header magic %x\n", __func__,
nt->OptionalHeader.Magic);
return NULL;
}

+ switch (image_type) {
+ case IMAGE_SUBSYSTEM_EFI_APPLICATION:
+ loaded_image_info->image_code_type = EFI_LOADER_CODE;
+ loaded_image_info->image_data_type = EFI_LOADER_DATA;
+ break;
+ case IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER:
+ loaded_image_info->image_code_type = EFI_BOOT_SERVICES_CODE;
+ loaded_image_info->image_data_type = EFI_BOOT_SERVICES_DATA;
+ break;
+ case IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER:
+ case IMAGE_SUBSYSTEM_SAL_RUNTIME_DRIVER:
+ loaded_image_info->image_code_type = EFI_RUNTIME_SERVICES_CODE;
+ loaded_image_info->image_data_type = EFI_RUNTIME_SERVICES_DATA;
+ break;
+ default:
+ printf("%s: invalid image type: %u\n", __func__, image_type);
+ break;
+ }
+
/* Load sections into RAM */
for (i = num_sections - 1; i >= 0; i--) {
IMAGE_SECTION_HEADER *sec = &sections[i];
--
2.13.5