mirror of
https://github.com/SerenityOS/serenity.git
synced 2026-11-07 12:38:38 -10:00
Sönke Holz
570c9f1833
The 32-bit SMBIOS case was missing a null check. This caused KUBSAN to trigger if neither a 64-bit SMBIOS nor a 32-bit SMBIOS configuration table was present.
62 lines
2.8 KiB
C++
62 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) 2024, Sönke Holz <[email protected]>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/EFIPrekernel/ConfigurationTable.h>
|
|
#include <Kernel/EFIPrekernel/Globals.h>
|
|
#include <Kernel/Firmware/SMBIOS/Definitions.h>
|
|
|
|
#include <LibDeviceTree/FlattenedDeviceTree.h>
|
|
|
|
namespace Kernel {
|
|
|
|
static void* search_efi_configuration_table(EFI::GUID guid)
|
|
{
|
|
for (FlatPtr i = 0; i < g_efi_system_table->number_of_table_entries; i++) {
|
|
if (g_efi_system_table->configuration_table[i].vendor_guid == guid)
|
|
return g_efi_system_table->configuration_table[i].vendor_table;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void populate_firmware_boot_info(BootInfo* boot_info)
|
|
{
|
|
boot_info->flattened_devicetree_paddr = PhysicalAddress { bit_cast<PhysicalPtr>(search_efi_configuration_table(EFI::DTB_TABLE_GUID)) };
|
|
if (!boot_info->flattened_devicetree_paddr.is_null()) {
|
|
DeviceTree::FlattenedDeviceTreeHeader* fdt_header = reinterpret_cast<DeviceTree::FlattenedDeviceTreeHeader*>(boot_info->flattened_devicetree_paddr.as_ptr());
|
|
boot_info->flattened_devicetree_size = fdt_header->totalsize;
|
|
}
|
|
|
|
// Prefer ACPI 2.0 or newer.
|
|
boot_info->acpi_rsdp_paddr = PhysicalAddress { bit_cast<PhysicalPtr>(search_efi_configuration_table(EFI::ACPI_2_0_TABLE_GUID)) };
|
|
if (boot_info->acpi_rsdp_paddr.is_null())
|
|
boot_info->acpi_rsdp_paddr = PhysicalAddress { bit_cast<PhysicalPtr>(search_efi_configuration_table(EFI::ACPI_TABLE_GUID)) };
|
|
|
|
// Prefer SMBIOS 3.x.
|
|
boot_info->smbios.entry_point_paddr = PhysicalAddress { bit_cast<PhysicalPtr>(search_efi_configuration_table(EFI::SMBIOS3_TABLE_GUID)) };
|
|
if (!boot_info->smbios.entry_point_paddr.is_null()) {
|
|
boot_info->smbios.entry_point_is_64_bit = true;
|
|
|
|
auto* entry_point = reinterpret_cast<SMBIOS::EntryPoint64bit*>(boot_info->smbios.entry_point_paddr.as_ptr());
|
|
boot_info->smbios.entry_point_length = entry_point->length;
|
|
boot_info->smbios.structure_table_paddr = PhysicalAddress { entry_point->table_ptr };
|
|
boot_info->smbios.maximum_structure_table_length = entry_point->table_maximum_size;
|
|
} else {
|
|
boot_info->smbios.entry_point_paddr = PhysicalAddress { bit_cast<PhysicalPtr>(search_efi_configuration_table(EFI::SMBIOS_TABLE_GUID)) };
|
|
|
|
if (!boot_info->smbios.entry_point_paddr.is_null()) {
|
|
boot_info->smbios.entry_point_is_64_bit = false;
|
|
|
|
auto* entry_point = reinterpret_cast<SMBIOS::EntryPoint32bit*>(boot_info->smbios.entry_point_paddr.as_ptr());
|
|
boot_info->smbios.entry_point_length = entry_point->length;
|
|
boot_info->smbios.structure_table_paddr = PhysicalAddress { entry_point->legacy_structure.smbios_table_ptr };
|
|
boot_info->smbios.maximum_structure_table_length = entry_point->legacy_structure.smbios_table_length;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|