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efi: add EFI_SYSTEM_TABLE_POINTER for debug

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Add EFI_SYSTEM_TABLE_POINTER structure for remote debugger to locate
the address of EFI_SYSTEM_TABLE.

This feature is described in UEFI SPEC version 2.10. Section 18.4.2.
The implementation ensures support for hardware-assisted debugging and
provides a standardized mechanism for debuggers to discover the EFI
system table.

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>
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> # change memset(systab_pointer, 0 ...) -> systab_pointer->crc32 = 0;
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Ying-Chun Liu (PaulLiu)
2025-07-03 07:28:07 +01:00
committed by Ilias Apalodimas
parent 46a564d689
commit aaf7be96c2
6 changed files with 75 additions and 0 deletions
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7
lib/efi_loader/efi_setup.c
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@@ -278,6 +278,13 @@ efi_status_t efi_init_obj_list(void)
if (ret != EFI_SUCCESS)
goto out;
/* Initialize system table pointer */
if (IS_ENABLED(CONFIG_EFI_DEBUG_SUPPORT)) {
ret = efi_initialize_system_table_pointer();
if (ret != EFI_SUCCESS)
goto out;
}
if (IS_ENABLED(CONFIG_EFI_ECPT)) {
ret = efi_ecpt_register();
if (ret != EFI_SUCCESS)