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efi: add EFI_DEBUG_IMAGE_INFO_TABLE for debug

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EFI_DEBUG_IMAGE_INFO_TABLE is used to store EFI_LOADED_IMAGE for
debug purpose. This commit adds the table to the EFI_CONFIGURATION_TABLE.

This feature is described in UEFI Spec version 2.10. Section 18.4.
The implementation ensures support for hardware-assisted debugging and
provides a standardized mechanism for debuggers to discover and interact
with system-level debug resources.

Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Peter Robinson <pbrobinson@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Ying-Chun Liu (PaulLiu)
2025-07-03 07:28:08 +01:00
committed by Ilias Apalodimas
parent aaf7be96c2
commit e7a85ec651
4 changed files with 72 additions and 0 deletions
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53
include/efi_api.h
View File

@@ -238,6 +238,10 @@ enum efi_reset_type {
EFI_GUID(0xcce33c35, 0x74ac, 0x4087, 0xbc, 0xe7, \
0x8b, 0x29, 0xb0, 0x2e, 0xeb, 0x27)
#define EFI_DEBUG_IMAGE_INFO_TABLE_GUID \
EFI_GUID(0x49152e77, 0x1ada, 0x4764, 0xb7, 0xa2, \
0x7a, 0xfe, 0xfe, 0xd9, 0x5e, 0x8b)
struct efi_conformance_profiles_table {
u16 version;
u16 number_of_profiles;
@@ -574,6 +578,55 @@ struct efi_loaded_image {
efi_status_t (EFIAPI *unload)(efi_handle_t image_handle);
};
#define EFI_DEBUG_IMAGE_INFO_UPDATE_IN_PROGRESS 0x01
#define EFI_DEBUG_IMAGE_INFO_TABLE_MODIFIED 0x02
/**
* struct efi_debug_image_info_normal - Store Debug Information for normal
* image.
* @image_info_type: the type of image info.
* @loaded_image_protocol_instance: the pointer to struct efi_loaded_image.
* @image_handle: the EFI handle of the image.
*
* This struct is created by efi_load_image() and store the information
* for debugging an normal image.
*/
struct efi_debug_image_info_normal {
u32 image_info_type;
struct efi_loaded_image *loaded_image_protocol_instance;
efi_handle_t image_handle;
};
/**
* union efi_debug_image_info - The union to store a pointer for EFI
* DEBUG IMAGE INFO.
* @image_info_type: the type of the image_info if it is not a normal image.
* @normal_image: The pointer to a normal image.
*
* This union is for a pointer that can point to the struct of normal_image.
* Or it points to an image_info_type.
*/
union efi_debug_image_info {
u32 *image_info_type;
struct efi_debug_image_info_normal *normal_image;
};
/**
* struct efi_debug_image_info_table_header - store the array of
* struct efi_debug_image_info.
* @update_status: Status to notify this struct is ready to use or not.
* @table_size: The number of elements of efi_debug_image_info_table.
* @efi_debug_image_info_table: The array of efi_debug_image_info.
*
* This struct stores the array of efi_debug_image_info. The
* number of elements is table_size.
*/
struct efi_debug_image_info_table_header {
volatile u32 update_status;
u32 table_size;
union efi_debug_image_info *efi_debug_image_info_table;
};
#define EFI_DEVICE_PATH_PROTOCOL_GUID \
EFI_GUID(0x09576e91, 0x6d3f, 0x11d2, \
0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)

2
include/efi_loader.h
View File

@@ -312,6 +312,8 @@ extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
extern const struct efi_hii_config_access_protocol efi_hii_config_access;
extern const struct efi_hii_database_protocol efi_hii_database;
extern const struct efi_hii_string_protocol efi_hii_string;
/* structure for EFI_DEBUG_SUPPORT_PROTOCOL */
extern struct efi_debug_image_info_table_header efi_m_debug_info_table_header;
uint16_t *efi_dp_str(struct efi_device_path *dp);

6
lib/efi_loader/efi_debug_support.c
View File

@@ -11,6 +11,12 @@
struct efi_system_table_pointer __efi_runtime_data * systab_pointer = NULL;
struct efi_debug_image_info_table_header efi_m_debug_info_table_header = {
0,
0,
NULL
};
/**
* efi_initialize_system_table_pointer() - Initialize system table pointer
*

11
lib/efi_loader/efi_setup.c
View File

@@ -18,6 +18,9 @@
efi_status_t efi_obj_list_initialized = OBJ_LIST_NOT_INITIALIZED;
const efi_guid_t efi_debug_image_info_table_guid =
EFI_DEBUG_IMAGE_INFO_TABLE_GUID;
/*
* Allow unaligned memory access.
*
@@ -280,9 +283,17 @@ efi_status_t efi_init_obj_list(void)
/* Initialize system table pointer */
if (IS_ENABLED(CONFIG_EFI_DEBUG_SUPPORT)) {
efi_guid_t debug_image_info_table_guid =
efi_debug_image_info_table_guid;
ret = efi_initialize_system_table_pointer();
if (ret != EFI_SUCCESS)
goto out;
ret = efi_install_configuration_table(&debug_image_info_table_guid,
&efi_m_debug_info_table_header);
if (ret != EFI_SUCCESS)
goto out;
}
if (IS_ENABLED(CONFIG_EFI_ECPT)) {