eersoy93/exectos
1
0
Fork 0
forked from xt-sys/exectos
Code Pull Requests Activity

Fix AcGetAcpiTable() routine failing to validate FADT checksum on some ACPI 2.0 and older machines

Browse Source
This commit is contained in:
Rafal Kupiec 2024-06-03 21:58:19 +02:00
parent 9124574bc5
commit f265810a5c
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
1 changed files with 24 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
xtldr/modules/acpi/acpi.c
View File

@ -148,16 +148,34 @@ AcGetAcpiTable(IN CONST UINT Signature,
} }
/* Verify table signature and checksum */ /* Verify table signature and checksum */
if((TableHeader->Signature == Signature) && (AcpChecksumTable(TableHeader, TableHeader->Length) == 0)) if((TableHeader->Signature == Signature))
{ {
/* Found valid ACPI table */ /* Found requested ACPI table */
*AcpiTable = TableHeader; break;
return STATUS_EFI_SUCCESS;
} }
} }
/* ACPI table not found */ /* Make sure table was found */
return STATUS_EFI_NOT_FOUND; if(TableHeader->Signature != Signature)
{
/* ACPI table not found, return error */
return STATUS_EFI_NOT_FOUND;
}
/* Don't validate FADT on old, broken firmwares with ACPI 2.0 or older */
if(TableHeader->Signature != ACPI_FADT_SIGNATURE || TableHeader->Revision > 2)
{
/* Validate table checksum */
if(AcpChecksumTable(TableHeader, TableHeader->Length) != 0)
{
/* Checksum mismatch, return error */
return STATUS_EFI_CRC_ERROR;
}
}
/* Found valid ACPI table, return success */
*AcpiTable = TableHeader;
return STATUS_EFI_SUCCESS;
} }
/** /**