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PrmPkg: Refactor some PrmLoaderDxe functionality into libraries

Browse Source 
This change breaks out two sets of responsibilities in
PrmLoaderDxe into libraries:
  * PE/COFF functions -> PrmPeCoffLib
  * PRM module discovery functions -> PrmModuleDiscoveryLib

This is core infrastructure code for PRM functionality that needs
to be directly reused and tested in other places. At this time,
the primary motivating factor is to use this code in two other
locations:
  1.) Link the functionality into unit testing modules
  2.) Link the functionality into a PRM UEFI application

Cc: Andrew Fish <afish@apple.com>
Cc: Kang Gao <kang.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Liu Yun <yun.y.liu@intel.com>
Cc: Ankit Sinha <ankit.sinha@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
Acked-by: Liming Gao <gaoliming@byosoft.com.cn>
Acked-by: Leif Lindholm <quic_llindhol@quicinc.com>
Reviewed-by: Ankit Sinha <ankit.sinha@intel.com>
This commit is contained in:
Michael Kubacki 2020-06-12 14:24:46 -07:00 committed by mergify[bot]
parent d10b8dc5d8
commit 6b7dde7cdd
13 changed files with 1133 additions and 636 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
PrmPkg/Include/Library/PrmModuleDiscoveryLib.h Normal file
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/** @file
The PRM Module Discovery library provides functionality to discover PRM modules installed by platform firmware.
Copyright (c) Microsoft Corporation
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef PRM_MODULE_DISCOVERY_LIB_H_
#define PRM_MODULE_DISCOVERY_LIB_H_
#include <Base.h>
#include <PrmContextBuffer.h>
#include <PrmModuleImageContext.h>
#include <Uefi.h>
/**
Gets the next PRM module discovered after the given PRM module.
@param[in,out] ModuleImageContext A pointer to a pointer to a PRM module image context structure.
@retval EFI_SUCCESS The next PRM module was found successfully.
@retval EFI_INVALID_PARAMETER The given ModuleImageContext structure is invalid or the pointer is NULL.
@retval EFI_NOT_FOUND The next PRM module was not found.
**/
EFI_STATUS
EFIAPI
GetNextPrmModuleEntry (
IN OUT PRM_MODULE_IMAGE_CONTEXT **ModuleImageContext
);
/**
Discovers all PRM Modules loaded during boot.
Each PRM Module discovered is placed into a linked list so the list can br processsed in the future.
@param[out] ModuleCount An optional pointer parameter that, if provided, is set to the number
of PRM modules discovered.
@param[out] HandlerCount An optional pointer parameter that, if provided, is set to the number
of PRM handlers discovered.
@retval EFI_SUCCESS All PRM Modules were discovered successfully.
@retval EFI_INVALID_PARAMETER An actual pointer parameter was passed as NULL.
@retval EFI_NOT_FOUND The gEfiLoadedImageProtocolGuid protocol could not be found.
@retval EFI_OUT_OF_RESOURCES Insufficient memory resources to allocate the new PRM Context
linked list nodes.
@retval EFI_ALREADY_STARTED The function was called previously and already discovered the PRM modules
loaded on this boot.
**/
EFI_STATUS
EFIAPI
DiscoverPrmModules (
OUT UINTN *ModuleCount OPTIONAL,
OUT UINTN *HandlerCount OPTIONAL
);
#endif

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PrmPkg/Include/Library/PrmPeCoffLib.h Normal file
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/** @file
The PRM PE/COFF library provides functionality to support additional PE/COFF functionality needed to use
Platform Runtime Mechanism (PRM) modules.
Copyright (c) Microsoft Corporation
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef PRM_PECOFF_LIB_H_
#define PRM_PECOFF_LIB_H_
#include <Base.h>
#include <PrmExportDescriptor.h>
#include <IndustryStandard/PeImage.h>
#include <Library/PeCoffLib.h>
/**
Gets a pointer to the export directory in a given PE/COFF image.
@param[in] ImageExportDirectory A pointer to an export directory table in a PE/COFF image.
@param[in] PeCoffLoaderImageContext A pointer to a PE_COFF_LOADER_IMAGE_CONTEXT structure that contains the
PE/COFF image context for the Image containing the PRM Module Export
Descriptor table.
@param[out] ExportDescriptor A pointer to a pointer to the PRM Module Export Descriptor table found
in the ImageExportDirectory given.
@retval EFI_SUCCESS The PRM Module Export Descriptor table was found successfully.
@retval EFI_INVALID_PARAMETER A required parameter is NULL.
@retval EFI_NOT_FOUND The PRM Module Export Descriptor table was not found in the given
ImageExportDirectory.
**/
EFI_STATUS
GetPrmModuleExportDescriptorTable (
IN EFI_IMAGE_EXPORT_DIRECTORY *ImageExportDirectory,
IN PE_COFF_LOADER_IMAGE_CONTEXT *PeCoffLoaderImageContext,
OUT PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT **ExportDescriptor
);
/**
Gets a pointer to the export directory in a given PE/COFF image.
@param[in] Image A pointer to a PE32/COFF image base address that is loaded into memory
and already relocated to the memory base address. RVAs in the image given
should be valid.
@param[in] PeCoffLoaderImageContext A pointer to a PE_COFF_LOADER_IMAGE_CONTEXT structure that contains the
PE/COFF image context for the Image given.
@param[out] ImageExportDirectory A pointer to a pointer to the export directory found in the Image given.
@retval EFI_SUCCESS The export directory was found successfully.
@retval EFI_INVALID_PARAMETER A required parameter is NULL.
@retval EFI_UNSUPPORTED The PE/COFF image given is not supported as a PRM Module.
@retval EFI_NOT_FOUND The image export directory could not be found for this image.
**/
EFI_STATUS
GetExportDirectoryInPeCoffImage (
IN VOID *Image,
IN PE_COFF_LOADER_IMAGE_CONTEXT *PeCoffLoaderImageContext,
OUT EFI_IMAGE_EXPORT_DIRECTORY **ImageExportDirectory
);
/**
Returns the image major and image minor version in a given PE/COFF image.
@param[in] Image A pointer to a PE32/COFF image base address that is loaded into memory
and already relocated to the memory base address. RVAs in the image given
should be valid.
@param[in] PeCoffLoaderImageContext A pointer to a PE_COFF_LOADER_IMAGE_CONTEXT structure that contains the
PE/COFF image context for the Image given.
@param[out] ImageMajorVersion A pointer to a UINT16 buffer to hold the image major version.
@param[out] ImageMinorVersion A pointer to a UINT16 buffer to hold the image minor version.
@retval EFI_SUCCESS The image version was read successfully.
@retval EFI_INVALID_PARAMETER A required parameter is NULL.
@retval EFI_UNSUPPORTED The PE/COFF image given is not supported.
**/
EFI_STATUS
GetImageVersionInPeCoffImage (
IN VOID *Image,
IN PE_COFF_LOADER_IMAGE_CONTEXT *PeCoffLoaderImageContext,
OUT UINT16 *ImageMajorVersion,
OUT UINT16 *ImageMinorVersion
);
/**
Gets the address of an entry in an image export table by ASCII name.
@param[in] ExportName A pointer to an ASCII name string of the entry name.
@param[in] ImageBaseAddress The base address of the PE/COFF image.
@param[in] ImageExportDirectory A pointer to the export directory in the image.
@param[out] ExportPhysicalAddress A pointer that will be updated with the address of the address of the
export entry if found.
@retval EFI_SUCCESS The export entry was found successfully.
@retval EFI_INVALID_PARAMETER A required pointer argument is NULL.
@retval EFI_NOT_FOUND An entry with the given ExportName was not found.
**/
EFI_STATUS
GetExportEntryAddress (
IN CONST CHAR8 *ExportName,
IN EFI_PHYSICAL_ADDRESS ImageBaseAddress,
IN EFI_IMAGE_EXPORT_DIRECTORY *ImageExportDirectory,
OUT EFI_PHYSICAL_ADDRESS *ExportPhysicalAddress
);
#endif

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PrmPkg/Include/PrmModuleImageContext.h Normal file
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/** @file
Definitions used internal to the PrmPkg implementation for PRM module image context.
Copyright (c) Microsoft Corporation
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef PRM_MODULE_IMAGE_CONTEXT_H_
#define PRM_MODULE_IMAGE_CONTEXT_H_
#include <IndustryStandard/PeImage.h>
#include <Library/PeCoffLib.h>
#include <PrmExportDescriptor.h>
#pragma pack(push, 1)
typedef struct {
PE_COFF_LOADER_IMAGE_CONTEXT PeCoffImageContext;
EFI_IMAGE_EXPORT_DIRECTORY *ExportDirectory;
PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT *ExportDescriptor;
} PRM_MODULE_IMAGE_CONTEXT;
#pragma pack(pop)
#endif

382
PrmPkg/Library/DxePrmModuleDiscoveryLib/DxePrmModuleDiscoveryLib.c Normal file
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/** @file
The PRM Module Discovery library provides functionality to discover PRM modules installed by platform firmware.
Copyright (c) Microsoft Corporation
Copyright (c) 2020 - 2022, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiMm.h>
#include <Protocol/MmAccess.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PrmModuleDiscoveryLib.h>
#include <Library/PrmPeCoffLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/LoadedImage.h>
#include "PrmModuleDiscovery.h"
#define _DBGMSGID_ "[PRMMODULEDISCOVERYLIB]"
LIST_ENTRY mPrmModuleList;
/**
Gets the next PRM module discovered after the given PRM module.
@param[in,out] ModuleImageContext A pointer to a pointer to a PRM module image context structure.
ModuleImageContext should point to a pointer that points to NULL to
get the first PRM module discovered.
@retval EFI_SUCCESS The next PRM module was found successfully.
@retval EFI_INVALID_PARAMETER The given ModuleImageContext structure is invalid or the pointer is NULL.
@retval EFI_NOT_FOUND The next PRM module was not found.
**/
EFI_STATUS
EFIAPI
GetNextPrmModuleEntry (
IN OUT PRM_MODULE_IMAGE_CONTEXT **ModuleImageContext
)
{
LIST_ENTRY *CurrentLink;
LIST_ENTRY *ForwardLink;
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *CurrentListEntry;
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *ForwardListEntry;
DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
if (ModuleImageContext == NULL) {
return EFI_INVALID_PARAMETER;
}
if (*ModuleImageContext == NULL) {
ForwardLink = GetFirstNode (&mPrmModuleList);
} else {
CurrentListEntry = NULL;
CurrentListEntry = CR (*ModuleImageContext, PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY, Context, PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY_SIGNATURE);
if (CurrentListEntry == NULL || CurrentListEntry->Signature != PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
CurrentLink = &CurrentListEntry->Link;
ForwardLink = GetNextNode (&mPrmModuleList, CurrentLink);
if (ForwardLink == &mPrmModuleList) {
return EFI_NOT_FOUND;
}
}
ForwardListEntry = BASE_CR (ForwardLink, PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY, Link);
if (ForwardListEntry->Signature == PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY_SIGNATURE) {
*ModuleImageContext = &ForwardListEntry->Context;
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
/**
Creates a new PRM Module Image Context linked list entry.
@retval PrmModuleImageContextListEntry If successful, a pointer a PRM Module Image Context linked list entry
otherwise, NULL is returned.
**/
STATIC
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *
CreateNewPrmModuleImageContextListEntry (
VOID
)
{
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *PrmModuleImageContextListEntry;
DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
PrmModuleImageContextListEntry = AllocateZeroPool (sizeof (*PrmModuleImageContextListEntry));
if (PrmModuleImageContextListEntry == NULL) {
return NULL;
}
DEBUG ((
DEBUG_INFO,
" %a %a: Allocated PrmModuleImageContextListEntry at 0x%x of size 0x%x bytes.\n",
_DBGMSGID_,
__FUNCTION__,
(UINTN) PrmModuleImageContextListEntry,
sizeof (*PrmModuleImageContextListEntry)
));
PrmModuleImageContextListEntry->Signature = PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY_SIGNATURE;
return PrmModuleImageContextListEntry;
}
/**
Check whether the address is within any of the MMRAM ranges.
@param[in] Address The address to be checked.
@param[in] MmramRanges Pointer to MMRAM descriptor.
@param[in] MmramRangeCount MMRAM range count.
@retval TRUE The address is in MMRAM ranges.
@retval FALSE The address is out of MMRAM ranges.
**/
BOOLEAN
EFIAPI
IsAddressInMmram (
IN EFI_PHYSICAL_ADDRESS Address,
IN EFI_MMRAM_DESCRIPTOR *MmramRanges,
IN UINTN MmramRangeCount
)
{
UINTN Index;
for (Index = 0; Index < MmramRangeCount; Index++) {
if ((Address >= MmramRanges[Index].CpuStart) &&
(Address < (MmramRanges[Index].CpuStart + MmramRanges[Index].PhysicalSize)))
{
return TRUE;
}
}
return FALSE;
}
/**
Discovers all PRM Modules loaded during boot.
Each PRM Module discovered is placed into a linked list so the list can br processsed in the future.
@param[out] ModuleCount An optional pointer parameter that, if provided, is set to the number
of PRM modules discovered.
@param[out] HandlerCount An optional pointer parameter that, if provided, is set to the number
of PRM handlers discovered.
@retval EFI_SUCCESS All PRM Modules were discovered successfully.
@retval EFI_INVALID_PARAMETER An actual pointer parameter was passed as NULL.
@retval EFI_NOT_FOUND The gEfiLoadedImageProtocolGuid protocol could not be found.
@retval EFI_OUT_OF_RESOURCES Insufficient memory resources to allocate the new PRM Context
linked list nodes.
@retval EFI_ALREADY_STARTED The function was called previously and already discovered the PRM modules
loaded on this boot.
**/
EFI_STATUS
EFIAPI
DiscoverPrmModules (
OUT UINTN *ModuleCount OPTIONAL,
OUT UINTN *HandlerCount OPTIONAL
)
{
EFI_STATUS Status;
PRM_MODULE_IMAGE_CONTEXT TempPrmModuleImageContext;
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *PrmModuleImageContextListEntry;
EFI_LOADED_IMAGE_PROTOCOL *LoadedImageProtocol;
EFI_HANDLE *HandleBuffer;
UINTN HandleCount;
UINTN Index;
UINTN PrmHandlerCount;
UINTN PrmModuleCount;
EFI_MM_ACCESS_PROTOCOL *MmAccess;
UINTN Size;
EFI_MMRAM_DESCRIPTOR *MmramRanges;
UINTN MmramRangeCount;
DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
PrmHandlerCount = 0;
PrmModuleCount = 0;
if (!IsListEmpty (&mPrmModuleList)) {
return EFI_ALREADY_STARTED;
}
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiLoadedImageProtocolGuid,
NULL,
&HandleCount,
&HandleBuffer
);
if (EFI_ERROR (Status) && (HandleCount == 0)) {
DEBUG ((DEBUG_ERROR, "%a %a: No LoadedImageProtocol instances found!\n", _DBGMSGID_, __FUNCTION__));
return EFI_NOT_FOUND;
}
MmramRanges = NULL;
MmramRangeCount = 0;
Status = gBS->LocateProtocol (
&gEfiMmAccessProtocolGuid,
NULL,
(VOID **)&MmAccess
);
if (Status == EFI_SUCCESS) {
//
// Get MMRAM range information
//
Size = 0;
Status = MmAccess->GetCapabilities (MmAccess, &Size, NULL);
if ((Status == EFI_BUFFER_TOO_SMALL) && (Size != 0)) {
MmramRanges = (EFI_MMRAM_DESCRIPTOR *)AllocatePool (Size);
if (MmramRanges != NULL) {
Status = MmAccess->GetCapabilities (MmAccess, &Size, MmramRanges);
if (Status == EFI_SUCCESS) {
MmramRangeCount = Size / sizeof (EFI_MMRAM_DESCRIPTOR);
}
}
}
}
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiLoadedImageProtocolGuid,
(VOID **) &LoadedImageProtocol
);
if (EFI_ERROR (Status)) {
continue;
}
if (IsAddressInMmram ((EFI_PHYSICAL_ADDRESS)(UINTN)(LoadedImageProtocol->ImageBase), MmramRanges, MmramRangeCount)) {
continue;
}
ZeroMem (&TempPrmModuleImageContext, sizeof (TempPrmModuleImageContext));
TempPrmModuleImageContext.PeCoffImageContext.Handle = LoadedImageProtocol->ImageBase;
TempPrmModuleImageContext.PeCoffImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;
Status = PeCoffLoaderGetImageInfo (&TempPrmModuleImageContext.PeCoffImageContext);
if (EFI_ERROR (Status) || TempPrmModuleImageContext.PeCoffImageContext.ImageError != IMAGE_ERROR_SUCCESS) {
DEBUG ((
DEBUG_WARN,
"%a %a: ImageHandle 0x%016lx is not a valid PE/COFF image. It cannot be considered a PRM module.\n",
_DBGMSGID_,
__FUNCTION__,
(EFI_PHYSICAL_ADDRESS) (UINTN) LoadedImageProtocol->ImageBase
));
continue;
}
if (TempPrmModuleImageContext.PeCoffImageContext.IsTeImage) {
// A PRM Module is not allowed to be a TE image
continue;
}
// Attempt to find an export table in this image
Status = GetExportDirectoryInPeCoffImage (
LoadedImageProtocol->ImageBase,
&TempPrmModuleImageContext.PeCoffImageContext,
&TempPrmModuleImageContext.ExportDirectory
);
if (EFI_ERROR (Status)) {
continue;
}
// Attempt to find the PRM Module Export Descriptor in the export table
Status = GetPrmModuleExportDescriptorTable (
TempPrmModuleImageContext.ExportDirectory,
&TempPrmModuleImageContext.PeCoffImageContext,
&TempPrmModuleImageContext.ExportDescriptor
);
if (EFI_ERROR (Status) || TempPrmModuleImageContext.ExportDescriptor == NULL) {
continue;
}
// A PRM Module Export Descriptor was successfully found, this is considered a PRM Module.
//
// Create a new PRM Module image context node
//
PrmModuleImageContextListEntry = CreateNewPrmModuleImageContextListEntry ();
if (PrmModuleImageContextListEntry == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CopyMem (
&PrmModuleImageContextListEntry->Context,
&TempPrmModuleImageContext,
sizeof (PrmModuleImageContextListEntry->Context)
);
InsertTailList (&mPrmModuleList, &PrmModuleImageContextListEntry->Link);
PrmHandlerCount += TempPrmModuleImageContext.ExportDescriptor->Header.NumberPrmHandlers;
PrmModuleCount++;
DEBUG ((DEBUG_INFO, "%a %a: New PRM Module inserted into list to be processed.\n", _DBGMSGID_, __FUNCTION__));
}
if (HandlerCount != NULL) {
*HandlerCount = PrmHandlerCount;
}
if (ModuleCount != NULL) {
*ModuleCount = PrmModuleCount;
}
if (MmramRanges != NULL) {
FreePool (MmramRanges);
}
return EFI_SUCCESS;
}
/**
The destructor function for this library instance.
Frees global resources allocated by this library instance.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The destructor always returns EFI_SUCCESS.
**/
EFI_STATUS
EFIAPI
PrmModuleDiscoveryLibDestructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
LIST_ENTRY *Link;
LIST_ENTRY *NextLink;
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *ListEntry;
if (IsListEmpty (&mPrmModuleList)) {
return EFI_SUCCESS;
}
Link = GetFirstNode (&mPrmModuleList);
while (!IsNull (&mPrmModuleList, Link)) {
ListEntry = CR (Link, PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY, Link, PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY_SIGNATURE);
NextLink = GetNextNode (&mPrmModuleList, Link);
RemoveEntryList (Link);
FreePool (ListEntry);
Link = NextLink;
}
return EFI_SUCCESS;
}
/**
The constructor function for this library instance.
Internally initializes data structures used later during library execution.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
**/
EFI_STATUS
EFIAPI
PrmModuleDiscoveryLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
InitializeListHead (&mPrmModuleList);
return EFI_SUCCESS;
}

41
PrmPkg/Library/DxePrmModuleDiscoveryLib/DxePrmModuleDiscoveryLib.inf Normal file
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## @file
# PRM Module Discovery Library
#
# Provides functionality to discover PRM modules loaded in the system boot.
#
# Copyright (c) Microsoft Corporation
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
##
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = DxePrmModuleDiscoveryLib
FILE_GUID = 95D3893F-4CBA-4C20-92C1-D24BFE3CE7B9
MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
LIBRARY_CLASS = PrmModuleDiscoveryLib|DXE_DRIVER UEFI_DRIVER UEFI_APPLICATION
CONSTRUCTOR = PrmModuleDiscoveryLibConstructor
DESTRUCTOR = PrmModuleDiscoveryLibDestructor
[Sources]
PrmModuleDiscovery.h
DxePrmModuleDiscoveryLib.c
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
PrmPkg/PrmPkg.dec
[LibraryClasses]
BaseLib
BaseMemoryLib
DebugLib
MemoryAllocationLib
PrmPeCoffLib
UefiBootServicesTableLib
[Protocols]
gEfiLoadedImageProtocolGuid
gEfiMmAccessProtocolGuid

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PrmPkg/Library/DxePrmModuleDiscoveryLib/PrmModuleDiscovery.h Normal file
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/** @file
Definitions internally used for Platform Runtime Mechanism (PRM) module discovery.
Copyright (c) Microsoft Corporation
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef PRM_MODULE_DISCOVERY_H_
#define PRM_MODULE_DISCOVERY_H_
#include <PrmModuleImageContext.h>
#define PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY_SIGNATURE SIGNATURE_32('P','R','M','E')
#pragma pack(push, 1)
typedef struct {
UINTN Signature;
LIST_ENTRY Link;
PRM_MODULE_IMAGE_CONTEXT Context;
} PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY;
#pragma pack(pop)
#endif

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PrmPkg/Library/DxePrmPeCoffLib/DxePrmPeCoffLib.c Normal file
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/** @file
This file contains implementation for additional PE/COFF functionality needed to use
Platform Runtime Mechanism (PRM) modules.
Copyright (c) Microsoft Corporation
Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <IndustryStandard/PeImage.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/PeCoffLib.h>
#include <PrmExportDescriptor.h>
#include <PrmModuleImageContext.h>
#define _DBGMSGID_ "[PRMPECOFFLIB]"
/**
Gets a pointer to the export directory in a given PE/COFF image.
@param[in] ImageExportDirectory A pointer to an export directory table in a PE/COFF image.
@param[in] PeCoffLoaderImageContext A pointer to a PE_COFF_LOADER_IMAGE_CONTEXT structure that contains the
PE/COFF image context for the Image containing the PRM Module Export
Descriptor table.
@param[out] ExportDescriptor A pointer to a pointer to the PRM Module Export Descriptor table found
in the ImageExportDirectory given.
@retval EFI_SUCCESS The PRM Module Export Descriptor table was found successfully.
@retval EFI_INVALID_PARAMETER A required parameter is NULL.
@retval EFI_NOT_FOUND The PRM Module Export Descriptor table was not found in the given
ImageExportDirectory.
**/
EFI_STATUS
GetPrmModuleExportDescriptorTable (
IN EFI_IMAGE_EXPORT_DIRECTORY *ImageExportDirectory,
IN PE_COFF_LOADER_IMAGE_CONTEXT *PeCoffLoaderImageContext,
OUT PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT **ExportDescriptor
)
{
UINTN Index;
EFI_PHYSICAL_ADDRESS CurrentImageAddress;
UINT16 PrmModuleExportDescriptorOrdinal;
CONST CHAR8 *CurrentExportName;
UINT16 *OrdinalTable;
UINT32 *ExportNamePointerTable;
UINT32 *ExportAddressTable;
PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT *TempExportDescriptor;
DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
if (ImageExportDirectory == NULL ||
PeCoffLoaderImageContext == NULL ||
PeCoffLoaderImageContext->ImageAddress == 0 ||
ExportDescriptor == NULL) {
return EFI_INVALID_PARAMETER;
}
*ExportDescriptor = NULL;
DEBUG ((
DEBUG_INFO,
" %a %a: %d exported names found in this image.\n",
_DBGMSGID_,
__FUNCTION__,
ImageExportDirectory->NumberOfNames
));
//
// The export name pointer table and export ordinal table form two parallel arrays associated by index.
//
CurrentImageAddress = PeCoffLoaderImageContext->ImageAddress;
ExportAddressTable = (UINT32 *) ((UINTN) CurrentImageAddress + ImageExportDirectory->AddressOfFunctions);
ExportNamePointerTable = (UINT32 *) ((UINTN) CurrentImageAddress + ImageExportDirectory->AddressOfNames);
OrdinalTable = (UINT16 *) ((UINTN) CurrentImageAddress + ImageExportDirectory->AddressOfNameOrdinals);
for (Index = 0; Index < ImageExportDirectory->NumberOfNames; Index++) {
CurrentExportName = (CONST CHAR8 *) ((UINTN) CurrentImageAddress + ExportNamePointerTable[Index]);
DEBUG ((
DEBUG_INFO,
" %a %a: Export Name[0x%x] - %a.\n",
_DBGMSGID_,
__FUNCTION__,
Index,
CurrentExportName
));
if (
AsciiStrnCmp (
PRM_STRING(PRM_MODULE_EXPORT_DESCRIPTOR_NAME),
CurrentExportName,
AsciiStrLen (PRM_STRING(PRM_MODULE_EXPORT_DESCRIPTOR_NAME))
) == 0) {
PrmModuleExportDescriptorOrdinal = OrdinalTable[Index];
DEBUG ((
DEBUG_INFO,
" %a %a: PRM Module Export Descriptor found. Ordinal = %d.\n",
_DBGMSGID_,
__FUNCTION__,
PrmModuleExportDescriptorOrdinal
));
if (PrmModuleExportDescriptorOrdinal >= ImageExportDirectory->NumberOfFunctions) {
DEBUG ((DEBUG_ERROR, "%a %a: The PRM Module Export Descriptor ordinal value is invalid.\n", _DBGMSGID_, __FUNCTION__));
return EFI_NOT_FOUND;
}
TempExportDescriptor = (PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT *) ((UINTN) CurrentImageAddress + ExportAddressTable[PrmModuleExportDescriptorOrdinal]);
if (TempExportDescriptor->Header.Signature == PRM_MODULE_EXPORT_DESCRIPTOR_SIGNATURE) {
*ExportDescriptor = TempExportDescriptor;
DEBUG ((DEBUG_INFO, " %a %a: PRM Module Export Descriptor found at 0x%x.\n", _DBGMSGID_, __FUNCTION__, (UINTN) ExportDescriptor));
} else {
DEBUG ((
DEBUG_INFO,
" %a %a: PRM Module Export Descriptor found at 0x%x but signature check failed.\n",
_DBGMSGID_,
__FUNCTION__,
(UINTN) TempExportDescriptor
));
}
DEBUG ((DEBUG_INFO, " %a %a: Exiting export iteration since export descriptor found.\n", _DBGMSGID_, __FUNCTION__));
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
/**
Gets a pointer to the export directory in a given PE/COFF image.
@param[in] Image A pointer to a PE32/COFF image base address that is loaded into memory
and already relocated to the memory base address. RVAs in the image given
should be valid.
@param[in] PeCoffLoaderImageContext A pointer to a PE_COFF_LOADER_IMAGE_CONTEXT structure that contains the
PE/COFF image context for the Image given.
@param[out] ImageExportDirectory A pointer to a pointer to the export directory found in the Image given.
@retval EFI_SUCCESS The export directory was found successfully.
@retval EFI_INVALID_PARAMETER A required parameter is NULL.
@retval EFI_UNSUPPORTED The PE/COFF image given is not supported as a PRM Module.
@retval EFI_NOT_FOUND The image export directory could not be found for this image.
**/
EFI_STATUS
GetExportDirectoryInPeCoffImage (
IN VOID *Image,
IN PE_COFF_LOADER_IMAGE_CONTEXT *PeCoffLoaderImageContext,
OUT EFI_IMAGE_EXPORT_DIRECTORY **ImageExportDirectory
)
{
UINT16 Magic;
UINT32 NumberOfRvaAndSizes;
EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION OptionalHeaderPtrUnion;
EFI_IMAGE_DATA_DIRECTORY *DirectoryEntry;
EFI_IMAGE_EXPORT_DIRECTORY *ExportDirectory;
if (Image == NULL || PeCoffLoaderImageContext == NULL || ImageExportDirectory == NULL) {
return EFI_INVALID_PARAMETER;
}
DirectoryEntry = NULL;
ExportDirectory = NULL;
//
// NOTE: For backward compatibility, use the Machine field to identify a PE32/PE32+
// image instead of using the Magic field. Some systems might generate a PE32+
// image with PE32 magic.
//
switch (PeCoffLoaderImageContext->Machine) {
case EFI_IMAGE_MACHINE_IA32:
//
// Assume PE32 image with IA32 Machine field.
//
Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
break;
case EFI_IMAGE_MACHINE_X64:
case EFI_IMAGE_MACHINE_AARCH64:
//
// Assume PE32+ image with X64 Machine field
//
Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
break;
default:
//
// For unknown Machine field, use Magic in optional header
//
DEBUG ((
DEBUG_WARN,
"%a %a: The machine type for this image is not valid for a PRM module.\n",
_DBGMSGID_,
__FUNCTION__
));
return EFI_UNSUPPORTED;
}
OptionalHeaderPtrUnion.Pe32 = (EFI_IMAGE_NT_HEADERS32 *) (
(UINTN) Image +
PeCoffLoaderImageContext->PeCoffHeaderOffset
);
//
// Check the PE/COFF Header Signature. Determine if the image is valid and/or a TE image.
//
if (OptionalHeaderPtrUnion.Pe32->Signature != EFI_IMAGE_NT_SIGNATURE) {
DEBUG ((DEBUG_ERROR, "%a %a: The PE signature is not valid for the current image.\n", _DBGMSGID_, __FUNCTION__));
return EFI_UNSUPPORTED;
}
if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
//
// Use the PE32 offset to get the Export Directory Entry
//
NumberOfRvaAndSizes = OptionalHeaderPtrUnion.Pe32->OptionalHeader.NumberOfRvaAndSizes;
DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *) &(OptionalHeaderPtrUnion.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_EXPORT]);
} else if (OptionalHeaderPtrUnion.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
//
// Use the PE32+ offset get the Export Directory Entry
//
NumberOfRvaAndSizes = OptionalHeaderPtrUnion.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;
DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *) &(OptionalHeaderPtrUnion.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_EXPORT]);
} else {
return EFI_UNSUPPORTED;
}
if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_EXPORT || DirectoryEntry->VirtualAddress == 0) {
//
// The export directory is not present
//
return EFI_NOT_FOUND;
} else if (((UINT32) (~0) - DirectoryEntry->VirtualAddress) < DirectoryEntry->Size) {
//
// The directory address overflows
//
DEBUG ((DEBUG_ERROR, "%a %a: The export directory entry in this image results in overflow.\n", _DBGMSGID_, __FUNCTION__));
return EFI_UNSUPPORTED;
} else {
DEBUG ((DEBUG_INFO, "%a %a: Export Directory Entry found in the image at 0x%x.\n", _DBGMSGID_, __FUNCTION__, (UINTN) OptionalHeaderPtrUnion.Pe32));
DEBUG ((DEBUG_INFO, " %a %a: Directory Entry Virtual Address = 0x%x.\n", _DBGMSGID_, __FUNCTION__, DirectoryEntry->VirtualAddress));
ExportDirectory = (EFI_IMAGE_EXPORT_DIRECTORY *) ((UINTN) Image + DirectoryEntry->VirtualAddress);
DEBUG ((
DEBUG_INFO,
" %a %a: Export Directory Table found successfully at 0x%x. Name address = 0x%x. Name = %a.\n",
_DBGMSGID_,
__FUNCTION__,
(UINTN) ExportDirectory,
((UINTN) Image + ExportDirectory->Name),
(CHAR8 *) ((UINTN) Image + ExportDirectory->Name)
));
}
*ImageExportDirectory = ExportDirectory;
return EFI_SUCCESS;
}
/**
Returns the image major and image minor version in a given PE/COFF image.
@param[in] Image A pointer to a PE32/COFF image base address that is loaded into memory
and already relocated to the memory base address. RVAs in the image given
should be valid.
@param[in] PeCoffLoaderImageContext A pointer to a PE_COFF_LOADER_IMAGE_CONTEXT structure that contains the
PE/COFF image context for the Image given.
@param[out] ImageMajorVersion A pointer to a UINT16 buffer to hold the image major version.
@param[out] ImageMinorVersion A pointer to a UINT16 buffer to hold the image minor version.
@retval EFI_SUCCESS The image version was read successfully.
@retval EFI_INVALID_PARAMETER A required parameter is NULL.
@retval EFI_UNSUPPORTED The PE/COFF image given is not supported.
**/
EFI_STATUS
GetImageVersionInPeCoffImage (
IN VOID *Image,
IN PE_COFF_LOADER_IMAGE_CONTEXT *PeCoffLoaderImageContext,
OUT UINT16 *ImageMajorVersion,
OUT UINT16 *ImageMinorVersion
)
{
EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION OptionalHeaderPtrUnion;
UINT16 Magic;
DEBUG ((DEBUG_INFO, " %a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
if (Image == NULL || PeCoffLoaderImageContext == NULL || ImageMajorVersion == NULL || ImageMinorVersion == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// NOTE: For backward compatibility, use the Machine field to identify a PE32/PE32+
// image instead of using the Magic field. Some systems might generate a PE32+
// image with PE32 magic.
//
switch (PeCoffLoaderImageContext->Machine) {
case EFI_IMAGE_MACHINE_IA32:
//
// Assume PE32 image
//
Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
break;
case EFI_IMAGE_MACHINE_X64:
case EFI_IMAGE_MACHINE_AARCH64:
//
// Assume PE32+ image
//
Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
break;
default:
//
// For unknown Machine field, use Magic in optional header
//
DEBUG ((
DEBUG_WARN,
"%a %a: The machine type for this image is not valid for a PRM module.\n",
_DBGMSGID_,
__FUNCTION__
));
return EFI_UNSUPPORTED;
}
OptionalHeaderPtrUnion.Pe32 = (EFI_IMAGE_NT_HEADERS32 *) (
(UINTN) Image +
PeCoffLoaderImageContext->PeCoffHeaderOffset
);
//
// Check the PE/COFF Header Signature. Determine if the image is valid and/or a TE image.
//
if (OptionalHeaderPtrUnion.Pe32->Signature != EFI_IMAGE_NT_SIGNATURE) {
DEBUG ((DEBUG_ERROR, "%a %a: The PE signature is not valid for the current image.\n", _DBGMSGID_, __FUNCTION__));
return EFI_UNSUPPORTED;
}
if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
//
// Use the PE32 offset to get the Export Directory Entry
//
*ImageMajorVersion = OptionalHeaderPtrUnion.Pe32->OptionalHeader.MajorImageVersion;
*ImageMinorVersion = OptionalHeaderPtrUnion.Pe32->OptionalHeader.MinorImageVersion;
} else {
//
// Use the PE32+ offset to get the Export Directory Entry
//
*ImageMajorVersion = OptionalHeaderPtrUnion.Pe32Plus->OptionalHeader.MajorImageVersion;
*ImageMinorVersion = OptionalHeaderPtrUnion.Pe32Plus->OptionalHeader.MinorImageVersion;
}
DEBUG ((DEBUG_INFO, " %a %a - Image Major Version: 0x%02x.\n", _DBGMSGID_, __FUNCTION__, *ImageMajorVersion));
DEBUG ((DEBUG_INFO, " %a %a - Image Minor Version: 0x%02x.\n", _DBGMSGID_, __FUNCTION__, *ImageMinorVersion));
return EFI_SUCCESS;
}
/**
Gets the address of an entry in an image export table by ASCII name.
@param[in] ExportName A pointer to an ASCII name string of the entry name.
@param[in] ImageBaseAddress The base address of the PE/COFF image.
@param[in] ImageExportDirectory A pointer to the export directory in the image.
@param[out] ExportPhysicalAddress A pointer that will be updated with the address of the address of the
export entry if found.
@retval EFI_SUCCESS The export entry was found successfully.
@retval EFI_INVALID_PARAMETER A required pointer argument is NULL.
@retval EFI_NOT_FOUND An entry with the given ExportName was not found.
**/
EFI_STATUS
GetExportEntryAddress (
IN CONST CHAR8 *ExportName,
IN EFI_PHYSICAL_ADDRESS ImageBaseAddress,
IN EFI_IMAGE_EXPORT_DIRECTORY *ImageExportDirectory,
OUT EFI_PHYSICAL_ADDRESS *ExportPhysicalAddress
)
{
UINTN ExportNameIndex;
UINT16 CurrentExportOrdinal;
UINT32 *ExportAddressTable;
UINT32 *ExportNamePointerTable;
UINT16 *OrdinalTable;
CONST CHAR8 *ExportNameTablePointerName;
if (ExportName == NULL || ImageBaseAddress == 0 || ImageExportDirectory == NULL || ExportPhysicalAddress == NULL) {
return EFI_INVALID_PARAMETER;
}
*ExportPhysicalAddress = 0;
ExportAddressTable = (UINT32 *) ((UINTN) ImageBaseAddress + ImageExportDirectory->AddressOfFunctions);
ExportNamePointerTable = (UINT32 *) ((UINTN) ImageBaseAddress + ImageExportDirectory->AddressOfNames);
OrdinalTable = (UINT16 *) ((UINTN) ImageBaseAddress + ImageExportDirectory->AddressOfNameOrdinals);
for (ExportNameIndex = 0; ExportNameIndex < ImageExportDirectory->NumberOfNames; ExportNameIndex++) {
ExportNameTablePointerName = (CONST CHAR8 *) ((UINTN) ImageBaseAddress + ExportNamePointerTable[ExportNameIndex]);
if (AsciiStrnCmp (ExportName, ExportNameTablePointerName, PRM_HANDLER_NAME_MAXIMUM_LENGTH) == 0) {
CurrentExportOrdinal = OrdinalTable[ExportNameIndex];
ASSERT (CurrentExportOrdinal < ImageExportDirectory->NumberOfFunctions);
if (CurrentExportOrdinal >= ImageExportDirectory->NumberOfFunctions) {
DEBUG ((DEBUG_ERROR, " %a %a: The export ordinal value is invalid.\n", _DBGMSGID_, __FUNCTION__));
break;
}
*ExportPhysicalAddress = (EFI_PHYSICAL_ADDRESS) ((UINTN) ImageBaseAddress + ExportAddressTable[CurrentExportOrdinal]);
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}

32
PrmPkg/Library/DxePrmPeCoffLib/DxePrmPeCoffLib.inf Normal file
View File

@ -0,0 +1,32 @@
## @file
# PRM PE/COFF Library
#
# Provides functionality to support additional PE/COFF functionality needed to use Platform Runtime Mechanism (PRM)
# modules.
#
# Copyright (c) Microsoft Corporation
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
##
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = DxePrmPeCoffLib
FILE_GUID = 0B9AEEAC-D79A-46A5-A784-84BDBC6291B5
MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
LIBRARY_CLASS = PrmPeCoffLib|DXE_DRIVER UEFI_DRIVER UEFI_APPLICATION
[Sources]
DxePrmPeCoffLib.c
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
PrmPkg/PrmPkg.dec
[LibraryClasses]
BaseLib
DebugLib
PeCoffLib

51
PrmPkg/PrmLoaderDxe/PrmLoader.h
View File

@ -1,51 +0,0 @@
/** @file
Definitions specific to the Platform Runtime Mechanism (PRM) loader.x
Copyright (c) Microsoft Corporation
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef PRM_LOADER_H_
#define PRM_LOADER_H_
#include <IndustryStandard/PeImage.h>
#include <Library/PeCoffLib.h>
#include <PrmExportDescriptor.h>
#define _DBGMSGID_ "[PRMLOADER]"
#define PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY_SIGNATURE SIGNATURE_32('P','R','M','E')
#pragma pack(push, 1)
typedef struct {
PE_COFF_LOADER_IMAGE_CONTEXT PeCoffImageContext;
EFI_IMAGE_EXPORT_DIRECTORY *ExportDirectory;
PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT *ExportDescriptor;
} PRM_MODULE_IMAGE_CONTEXT;
typedef struct {
UINTN Signature;
LIST_ENTRY Link;
PRM_MODULE_IMAGE_CONTEXT *Context;
} PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY;
#pragma pack(pop)
//
// Iterate through the double linked list. NOT delete safe.
//
#define EFI_LIST_FOR_EACH(Entry, ListHead) \
for(Entry = (ListHead)->ForwardLink; Entry != (ListHead); Entry = Entry->ForwardLink)
//
// Iterate through the double linked list. This is delete-safe.
// Don't touch NextEntry.
//
#define EFI_LIST_FOR_EACH_SAFE(Entry, NextEntry, ListHead) \
for(Entry = (ListHead)->ForwardLink, NextEntry = Entry->ForwardLink;\
Entry != (ListHead); Entry = NextEntry, NextEntry = Entry->ForwardLin
#endif

600
PrmPkg/PrmLoaderDxe/PrmLoaderDxe.c
View File

@ -10,7 +10,6 @@
**/
#include "PrmAcpiTable.h"
#include "PrmLoader.h"
#include <IndustryStandard/Acpi.h>
#include <Library/BaseLib.h>
@ -18,581 +17,20 @@
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PrmContextBufferLib.h>
#include <Library/PrmModuleDiscoveryLib.h>
#include <Library/PrmPeCoffLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Protocol/AcpiTable.h>
#include <Protocol/LoadedImage.h>
#include <Protocol/PrmConfig.h>
#include <PrmContextBuffer.h>
#include <PrmMmio.h>
LIST_ENTRY mPrmModuleList;
#define _DBGMSGID_ "[PRMLOADER]"
// Todo: Potentially refactor mPrmHandlerCount and mPrmModuleCount into localized structures
// in the future.
UINT32 mPrmHandlerCount;
UINT32 mPrmModuleCount;
/**
Gets a pointer to the export directory in a given PE/COFF image.
@param[in] ImageExportDirectory A pointer to an export directory table in a PE/COFF image.
@param[in] PeCoffLoaderImageContext A pointer to a PE_COFF_LOADER_IMAGE_CONTEXT structure that contains the
PE/COFF image context for the Image containing the PRM Module Export
Descriptor table.
@param[out] ExportDescriptor A pointer to a pointer to the PRM Module Export Descriptor table found
in the ImageExportDirectory given.
@retval EFI_SUCCESS The PRM Module Export Descriptor table was found successfully.
@retval EFI_INVALID_PARAMETER A required parameter is NULL.
@retval EFI_NOT_FOUND The PRM Module Export Descriptor table was not found in the given
ImageExportDirectory.
**/
EFI_STATUS
GetPrmModuleExportDescriptorTable (
IN EFI_IMAGE_EXPORT_DIRECTORY *ImageExportDirectory,
IN PE_COFF_LOADER_IMAGE_CONTEXT *PeCoffLoaderImageContext,
OUT PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT **ExportDescriptor
)
{
UINTN Index;
EFI_PHYSICAL_ADDRESS CurrentImageAddress;
UINT16 PrmModuleExportDescriptorOrdinal;
CONST CHAR8 *CurrentExportName;
UINT16 *OrdinalTable;
UINT32 *ExportNamePointerTable;
UINT32 *ExportAddressTable;
PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT *TempExportDescriptor;
DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
*ExportDescriptor = NULL;
if (ImageExportDirectory == NULL ||
PeCoffLoaderImageContext == NULL ||
PeCoffLoaderImageContext->ImageAddress == 0 ||
ExportDescriptor == NULL) {
return EFI_INVALID_PARAMETER;
}
DEBUG ((
DEBUG_INFO,
" %a %a: %d exported names found in this image.\n",
_DBGMSGID_,
__FUNCTION__,
ImageExportDirectory->NumberOfNames
));
//
// The export name pointer table and export ordinal table form two parallel arrays associated by index.
//
CurrentImageAddress = PeCoffLoaderImageContext->ImageAddress;
ExportAddressTable = (UINT32 *) ((UINTN) CurrentImageAddress + ImageExportDirectory->AddressOfFunctions);
ExportNamePointerTable = (UINT32 *) ((UINTN) CurrentImageAddress + ImageExportDirectory->AddressOfNames);
OrdinalTable = (UINT16 *) ((UINTN) CurrentImageAddress + ImageExportDirectory->AddressOfNameOrdinals);
for (Index = 0; Index < ImageExportDirectory->NumberOfNames; Index++) {
CurrentExportName = (CONST CHAR8 *) ((UINTN) CurrentImageAddress + ExportNamePointerTable[Index]);
DEBUG ((
DEBUG_INFO,
" %a %a: Export Name[0x%x] - %a.\n",
_DBGMSGID_,
__FUNCTION__,
Index,
CurrentExportName
));
if (
AsciiStrnCmp (
PRM_STRING(PRM_MODULE_EXPORT_DESCRIPTOR_NAME),
CurrentExportName,
AsciiStrLen (PRM_STRING(PRM_MODULE_EXPORT_DESCRIPTOR_NAME))
) == 0) {
PrmModuleExportDescriptorOrdinal = OrdinalTable[Index];
DEBUG ((
DEBUG_INFO,
" %a %a: PRM Module Export Descriptor found. Ordinal = %d.\n",
_DBGMSGID_,
__FUNCTION__,
PrmModuleExportDescriptorOrdinal
));
if (PrmModuleExportDescriptorOrdinal >= ImageExportDirectory->NumberOfFunctions) {
DEBUG ((DEBUG_ERROR, "%a %a: The PRM Module Export Descriptor ordinal value is invalid.\n", _DBGMSGID_, __FUNCTION__));
return EFI_NOT_FOUND;
}
TempExportDescriptor = (PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT *) ((UINTN) CurrentImageAddress + ExportAddressTable[PrmModuleExportDescriptorOrdinal]);
if (TempExportDescriptor->Header.Signature == PRM_MODULE_EXPORT_DESCRIPTOR_SIGNATURE) {
*ExportDescriptor = TempExportDescriptor;
DEBUG ((DEBUG_INFO, " %a %a: PRM Module Export Descriptor found at 0x%x.\n", _DBGMSGID_, __FUNCTION__, (UINTN) ExportDescriptor));
} else {
DEBUG ((
DEBUG_INFO,
" %a %a: PRM Module Export Descriptor found at 0x%x but signature check failed.\n",
_DBGMSGID_,
__FUNCTION__,
(UINTN) TempExportDescriptor
));
}
DEBUG ((DEBUG_INFO, " %a %a: Exiting export iteration since export descriptor found.\n", _DBGMSGID_, __FUNCTION__));
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
/**
Gets a pointer to the export directory in a given PE/COFF image.
@param[in] Image A pointer to a PE32/COFF image base address that is loaded into memory
and already relocated to the memory base address. RVAs in the image given
should be valid.
@param[in] PeCoffLoaderImageContext A pointer to a PE_COFF_LOADER_IMAGE_CONTEXT structure that contains the
PE/COFF image context for the Image given.
@param[out] ImageExportDirectory A pointer to a pointer to the export directory found in the Image given.
@retval EFI_SUCCESS The export directory was found successfully.
@retval EFI_INVALID_PARAMETER A required parameter is NULL.
@retval EFI_UNSUPPORTED The PE/COFF image given is not supported as a PRM Module.
@retval EFI_NOT_FOUND The image export directory could not be found for this image.
**/
EFI_STATUS
GetExportDirectoryInPeCoffImage (
IN VOID *Image,
IN PE_COFF_LOADER_IMAGE_CONTEXT *PeCoffLoaderImageContext,
OUT EFI_IMAGE_EXPORT_DIRECTORY **ImageExportDirectory
)
{
UINT16 Magic;
UINT32 NumberOfRvaAndSizes;
EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION OptionalHeaderPtrUnion;
EFI_IMAGE_DATA_DIRECTORY *DirectoryEntry;
EFI_IMAGE_EXPORT_DIRECTORY *ExportDirectory;
EFI_IMAGE_SECTION_HEADER *SectionHeader;
if (Image == NULL || PeCoffLoaderImageContext == NULL || ImageExportDirectory == NULL) {
return EFI_INVALID_PARAMETER;
}
DirectoryEntry = NULL;
ExportDirectory = NULL;
//
// NOTE: For backward compatibility, use the Machine field to identify a PE32/PE32+
// image instead of using the Magic field. Some systems might generate a PE32+
// image with PE32 magic.
//
switch (PeCoffLoaderImageContext->Machine) {
case EFI_IMAGE_MACHINE_IA32:
// Todo: Add EFI_IMAGE_MACHINE_ARMT
//
// Assume PE32 image with IA32 Machine field.
//
Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
break;
case EFI_IMAGE_MACHINE_X64:
//
// Assume PE32+ image with X64 Machine field
//
Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
break;
default:
//
// For unknown Machine field, use Magic in optional header
//
DEBUG ((
DEBUG_WARN,
"%a %a: The machine type for this image is not valid for a PRM module.\n",
_DBGMSGID_,
__FUNCTION__
));
return EFI_UNSUPPORTED;
}
OptionalHeaderPtrUnion.Pe32 = (EFI_IMAGE_NT_HEADERS32 *) (
(UINTN) Image +
PeCoffLoaderImageContext->PeCoffHeaderOffset
);
//
// Check the PE/COFF Header Signature. Determine if the image is valid and/or a TE image.
//
if (OptionalHeaderPtrUnion.Pe32->Signature != EFI_IMAGE_NT_SIGNATURE) {
DEBUG ((DEBUG_ERROR, "%a %a: The PE signature is not valid for the current image.\n", _DBGMSGID_, __FUNCTION__));
return EFI_UNSUPPORTED;
}
SectionHeader = (EFI_IMAGE_SECTION_HEADER *) (
(UINTN) Image +
PeCoffLoaderImageContext->PeCoffHeaderOffset +
sizeof (UINT32) +
sizeof (EFI_IMAGE_FILE_HEADER) +
PeCoffLoaderImageContext->SizeOfHeaders
);
if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
//
// Use the PE32 offset to get the Export Directory Entry
//
NumberOfRvaAndSizes = OptionalHeaderPtrUnion.Pe32->OptionalHeader.NumberOfRvaAndSizes;
DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *) &(OptionalHeaderPtrUnion.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_EXPORT]);
} else if (OptionalHeaderPtrUnion.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
//
// Use the PE32+ offset get the Export Directory Entry
//
NumberOfRvaAndSizes = OptionalHeaderPtrUnion.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;
DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *) &(OptionalHeaderPtrUnion.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_EXPORT]);
} else {
return EFI_UNSUPPORTED;
}
if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_EXPORT || DirectoryEntry->VirtualAddress == 0) {
//
// The export directory is not present
//
return EFI_NOT_FOUND;
} else if (((UINT32) (~0) - DirectoryEntry->VirtualAddress) < DirectoryEntry->Size) {
//
// The directory address overflows
//
DEBUG ((DEBUG_ERROR, "%a %a: The export directory entry in this image results in overflow.\n", _DBGMSGID_, __FUNCTION__));
return EFI_UNSUPPORTED;
} else {
DEBUG ((DEBUG_INFO, "%a %a: Export Directory Entry found in the image at 0x%x.\n", _DBGMSGID_, __FUNCTION__, (UINTN) OptionalHeaderPtrUnion.Pe32));
DEBUG ((DEBUG_INFO, " %a %a: Directory Entry Virtual Address = 0x%x.\n", _DBGMSGID_, __FUNCTION__, DirectoryEntry->VirtualAddress));
ExportDirectory = (EFI_IMAGE_EXPORT_DIRECTORY *) ((UINTN) Image + DirectoryEntry->VirtualAddress);
DEBUG ((
DEBUG_INFO,
" %a %a: Export Directory Table found successfully at 0x%x. Name address = 0x%x. Name = %a.\n",
_DBGMSGID_,
__FUNCTION__,
(UINTN) ExportDirectory,
((UINTN) Image + ExportDirectory->Name),
(CHAR8 *) ((UINTN) Image + ExportDirectory->Name)
));
}
*ImageExportDirectory = ExportDirectory;
return EFI_SUCCESS;
}
/**
Returns the image major and image minor version in a given PE/COFF image.
@param[in] Image A pointer to a PE32/COFF image base address that is loaded into memory
and already relocated to the memory base address. RVAs in the image given
should be valid.
@param[in] PeCoffLoaderImageContext A pointer to a PE_COFF_LOADER_IMAGE_CONTEXT structure that contains the
PE/COFF image context for the Image given.
@param[out] ImageMajorVersion A pointer to a UINT16 buffer to hold the image major version.
@param[out] ImageMinorVersion A pointer to a UINT16 buffer to hold the image minor version.
@retval EFI_SUCCESS The image version was read successfully.
@retval EFI_INVALID_PARAMETER A required parameter is NULL.
@retval EFI_UNSUPPORTED The PE/COFF image given is not supported.
**/
EFI_STATUS
GetImageVersionInPeCoffImage (
IN VOID *Image,
IN PE_COFF_LOADER_IMAGE_CONTEXT *PeCoffLoaderImageContext,
OUT UINT16 *ImageMajorVersion,
OUT UINT16 *ImageMinorVersion
)
{
EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION OptionalHeaderPtrUnion;
UINT16 Magic;
DEBUG ((DEBUG_INFO, " %a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
if (Image == NULL || PeCoffLoaderImageContext == NULL || ImageMajorVersion == NULL || ImageMinorVersion == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// NOTE: For backward compatibility, use the Machine field to identify a PE32/PE32+
// image instead of using the Magic field. Some systems might generate a PE32+
// image with PE32 magic.
//
switch (PeCoffLoaderImageContext->Machine) {
case EFI_IMAGE_MACHINE_IA32:
// Todo: Add EFI_IMAGE_MACHINE_ARMT
//
// Assume PE32 image with IA32 Machine field.
//
Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
break;
case EFI_IMAGE_MACHINE_X64:
//
// Assume PE32+ image with X64 Machine field
//
Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
break;
default:
//
// For unknown Machine field, use Magic in optional header
//
DEBUG ((
DEBUG_WARN,
"%a %a: The machine type for this image is not valid for a PRM module.\n",
_DBGMSGID_,
__FUNCTION__
));
return EFI_UNSUPPORTED;
}
OptionalHeaderPtrUnion.Pe32 = (EFI_IMAGE_NT_HEADERS32 *) (
(UINTN) Image +
PeCoffLoaderImageContext->PeCoffHeaderOffset
);
//
// Check the PE/COFF Header Signature. Determine if the image is valid and/or a TE image.
//
if (OptionalHeaderPtrUnion.Pe32->Signature != EFI_IMAGE_NT_SIGNATURE) {
DEBUG ((DEBUG_ERROR, "%a %a: The PE signature is not valid for the current image.\n", _DBGMSGID_, __FUNCTION__));
return EFI_UNSUPPORTED;
}
if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
//
// Use the PE32 offset to get the Export Directory Entry
//
*ImageMajorVersion = OptionalHeaderPtrUnion.Pe32->OptionalHeader.MajorImageVersion;
*ImageMinorVersion = OptionalHeaderPtrUnion.Pe32->OptionalHeader.MinorImageVersion;
} else {
//
// Use the PE32+ offset to get the Export Directory Entry
//
*ImageMajorVersion = OptionalHeaderPtrUnion.Pe32Plus->OptionalHeader.MajorImageVersion;
*ImageMinorVersion = OptionalHeaderPtrUnion.Pe32Plus->OptionalHeader.MinorImageVersion;
}
DEBUG ((DEBUG_INFO, " %a %a - Image Major Version: 0x%02x.\n", _DBGMSGID_, __FUNCTION__, *ImageMajorVersion));
DEBUG ((DEBUG_INFO, " %a %a - Image Minor Version: 0x%02x.\n", _DBGMSGID_, __FUNCTION__, *ImageMinorVersion));
return EFI_SUCCESS;
}
/**
Creates a new PRM Module Image Context linked list entry.
@retval PrmModuleImageContextListEntry If successful, a pointer a PRM Module Image Context linked list entry
otherwise, NULL is returned.
**/
STATIC
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *
CreateNewPrmModuleImageContextListEntry (
VOID
)
{
PRM_MODULE_IMAGE_CONTEXT *PrmModuleImageContext;
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *PrmModuleImageContextListEntry;
DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
PrmModuleImageContext = AllocateZeroPool (sizeof (*PrmModuleImageContext));
if (PrmModuleImageContext == NULL) {
return NULL;
}
DEBUG ((
DEBUG_INFO,
" %a %a: Allocated PrmModuleImageContext at 0x%x of size 0x%x bytes.\n",
_DBGMSGID_,
__FUNCTION__,
(UINTN) PrmModuleImageContext,
sizeof (*PrmModuleImageContext)
));
PrmModuleImageContextListEntry = AllocateZeroPool (sizeof (*PrmModuleImageContextListEntry));
if (PrmModuleImageContextListEntry == NULL) {
FreePool (PrmModuleImageContext);
return NULL;
}
DEBUG ((
DEBUG_INFO,
" %a %a: Allocated PrmModuleImageContextListEntry at 0x%x of size 0x%x bytes.\n",
_DBGMSGID_,
__FUNCTION__,
(UINTN) PrmModuleImageContextListEntry,
sizeof (*PrmModuleImageContextListEntry)
));
PrmModuleImageContextListEntry->Signature = PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY_SIGNATURE;
PrmModuleImageContextListEntry->Context = PrmModuleImageContext;
return PrmModuleImageContextListEntry;
}
/**
Discovers all PRM Modules loaded during the DXE boot phase.
Each PRM Module discovered is placed into a linked list so the list can br processsed in the future.
@retval EFI_SUCCESS All PRM Modules were discovered successfully.
@retval EFI_NOT_FOUND The gEfiLoadedImageProtocolGuid protocol could not be found.
@retval EFI_OUT_OF_RESOURCES Insufficient memory resources to allocate the new PRM Context
linked list nodes.
**/
EFI_STATUS
DiscoverPrmModules (
VOID
)
{
EFI_STATUS Status;
PRM_MODULE_IMAGE_CONTEXT TempPrmModuleImageContext;
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *PrmModuleImageContextListEntry;
EFI_LOADED_IMAGE_PROTOCOL *LoadedImageProtocol;
EFI_HANDLE *HandleBuffer;
UINTN HandleCount;
UINTN Index;
DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiLoadedImageProtocolGuid,
NULL,
&HandleCount,
&HandleBuffer
);
if (EFI_ERROR (Status) && (HandleCount == 0)) {
DEBUG ((DEBUG_ERROR, "%a %a: No LoadedImageProtocol instances found!\n", _DBGMSGID_, __FUNCTION__));
return EFI_NOT_FOUND;
}
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiLoadedImageProtocolGuid,
(VOID **) &LoadedImageProtocol
);
if (EFI_ERROR (Status)) {
continue;
}
ZeroMem (&TempPrmModuleImageContext, sizeof (TempPrmModuleImageContext));
TempPrmModuleImageContext.PeCoffImageContext.Handle = LoadedImageProtocol->ImageBase;
TempPrmModuleImageContext.PeCoffImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;
Status = PeCoffLoaderGetImageInfo (&TempPrmModuleImageContext.PeCoffImageContext);
if (EFI_ERROR (Status) || TempPrmModuleImageContext.PeCoffImageContext.ImageError != IMAGE_ERROR_SUCCESS) {
DEBUG ((
DEBUG_WARN,
"%a %a: ImageHandle 0x%016lx is not a valid PE/COFF image. It cannot be considered a PRM module.\n",
_DBGMSGID_,
__FUNCTION__,
(EFI_PHYSICAL_ADDRESS) (UINTN) LoadedImageProtocol->ImageBase
));
continue;
}
if (TempPrmModuleImageContext.PeCoffImageContext.IsTeImage) {
// A PRM Module is not allowed to be a TE image
continue;
}
// Attempt to find an export table in this image
Status = GetExportDirectoryInPeCoffImage (
LoadedImageProtocol->ImageBase,
&TempPrmModuleImageContext.PeCoffImageContext,
&TempPrmModuleImageContext.ExportDirectory
);
if (EFI_ERROR (Status)) {
continue;
}
// Attempt to find the PRM Module Export Descriptor in the export table
Status = GetPrmModuleExportDescriptorTable (
TempPrmModuleImageContext.ExportDirectory,
&TempPrmModuleImageContext.PeCoffImageContext,
&TempPrmModuleImageContext.ExportDescriptor
);
if (EFI_ERROR (Status)) {
continue;
}
// A PRM Module Export Descriptor was successfully found, this is considered a PRM Module.
//
// Create a new PRM Module image context node
//
PrmModuleImageContextListEntry = CreateNewPrmModuleImageContextListEntry ();
if (PrmModuleImageContextListEntry == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CopyMem (
PrmModuleImageContextListEntry->Context,
&TempPrmModuleImageContext,
sizeof (*(PrmModuleImageContextListEntry->Context))
);
InsertTailList (&mPrmModuleList, &PrmModuleImageContextListEntry->Link);
mPrmHandlerCount += TempPrmModuleImageContext.ExportDescriptor->Header.NumberPrmHandlers;
mPrmModuleCount++; // Todo: Match with global variable refactor change in the future
DEBUG ((DEBUG_INFO, "%a %a: New PRM Module inserted into list to be processed.\n", _DBGMSGID_, __FUNCTION__));
}
return EFI_SUCCESS;
}
/**
Gets the address of an entry in an image export table by ASCII name.
@param[in] ExportName A pointer to an ASCII name string of the entry name.
@param[in] ImageBaseAddress The base address of the PE/COFF image.
@param[in] ImageExportDirectory A pointer to the export directory in the image.
@param[out] ExportPhysicalAddress A pointer that will be updated with the address of the address of the
export entry if found.
@retval EFI_SUCCESS The export entry was found successfully.
@retval EFI_INVALID_PARAMETER A required pointer argument is NULL.
@retval EFI_NOT_FOUND An entry with the given ExportName was not found.
**/
EFI_STATUS
GetExportEntryAddress (
IN CONST CHAR8 *ExportName,
IN EFI_PHYSICAL_ADDRESS ImageBaseAddress,
IN EFI_IMAGE_EXPORT_DIRECTORY *ImageExportDirectory,
OUT EFI_PHYSICAL_ADDRESS *ExportPhysicalAddress
)
{
UINTN ExportNameIndex;
UINT16 CurrentExportOrdinal;
UINT32 *ExportAddressTable;
UINT32 *ExportNamePointerTable;
UINT16 *OrdinalTable;
CONST CHAR8 *ExportNameTablePointerName;
if (ExportName == NULL || ImageBaseAddress == 0 || ImageExportDirectory == NULL || ExportPhysicalAddress == NULL) {
return EFI_INVALID_PARAMETER;
}
*ExportPhysicalAddress = 0;
ExportAddressTable = (UINT32 *) ((UINTN) ImageBaseAddress + ImageExportDirectory->AddressOfFunctions);
ExportNamePointerTable = (UINT32 *) ((UINTN) ImageBaseAddress + ImageExportDirectory->AddressOfNames);
OrdinalTable = (UINT16 *) ((UINTN) ImageBaseAddress + ImageExportDirectory->AddressOfNameOrdinals);
for (ExportNameIndex = 0; ExportNameIndex < ImageExportDirectory->NumberOfNames; ExportNameIndex++) {
ExportNameTablePointerName = (CONST CHAR8 *) ((UINTN) ImageBaseAddress + ExportNamePointerTable[ExportNameIndex]);
if (AsciiStrnCmp (ExportName, ExportNameTablePointerName, PRM_HANDLER_NAME_MAXIMUM_LENGTH) == 0) {
CurrentExportOrdinal = OrdinalTable[ExportNameIndex];
ASSERT (CurrentExportOrdinal < ImageExportDirectory->NumberOfFunctions);
if (CurrentExportOrdinal >= ImageExportDirectory->NumberOfFunctions) {
DEBUG ((DEBUG_ERROR, " %a %a: The export ordinal value is invalid.\n", _DBGMSGID_, __FUNCTION__));
break;
}
*ExportPhysicalAddress = (EFI_PHYSICAL_ADDRESS) ((UINTN) ImageBaseAddress + ExportAddressTable[CurrentExportOrdinal]);
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
UINTN mPrmHandlerCount;
UINTN mPrmModuleCount;
/**
Processes a list of PRM context entries to build a PRM ACPI table.
@ -616,9 +54,8 @@ ProcessPrmModules (
{
EFI_IMAGE_EXPORT_DIRECTORY *CurrentImageExportDirectory;
PRM_MODULE_EXPORT_DESCRIPTOR_STRUCT *CurrentExportDescriptorStruct;
LIST_ENTRY *Link;
PRM_ACPI_DESCRIPTION_TABLE *PrmAcpiTable;
PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY *TempListEntry;
PRM_MODULE_IMAGE_CONTEXT *CurrentPrmModuleImageContext;
CONST CHAR8 *CurrentExportDescriptorHandlerName;
ACPI_PARAMETER_BUFFER_DESCRIPTOR *CurrentModuleAcpiParamDescriptors;
@ -640,13 +77,12 @@ ProcessPrmModules (
if (PrmAcpiDescriptionTable == NULL) {
return EFI_INVALID_PARAMETER;
}
Link = NULL;
*PrmAcpiDescriptionTable = NULL;
DEBUG ((DEBUG_INFO, " %a %a: %d total PRM modules to process.\n", _DBGMSGID_, __FUNCTION__, mPrmModuleCount));
DEBUG ((DEBUG_INFO, " %a %a: %d total PRM handlers to process.\n", _DBGMSGID_, __FUNCTION__, mPrmHandlerCount));
PrmAcpiDescriptionTableBufferSize = (OFFSET_OF (PRM_ACPI_DESCRIPTION_TABLE, PrmModuleInfoStructure) +
PrmAcpiDescriptionTableBufferSize = (UINT32) (OFFSET_OF (PRM_ACPI_DESCRIPTION_TABLE, PrmModuleInfoStructure) +
(OFFSET_OF (PRM_MODULE_INFORMATION_STRUCT, HandlerInfoStructure) * mPrmModuleCount) +
(sizeof (PRM_HANDLER_INFORMATION_STRUCT) * mPrmHandlerCount)
);
@ -667,18 +103,20 @@ ProcessPrmModules (
PrmAcpiTable->Header.CreatorId = PcdGet32 (PcdAcpiDefaultCreatorId);
PrmAcpiTable->Header.CreatorRevision = PcdGet32 (PcdAcpiDefaultCreatorRevision);
PrmAcpiTable->PrmModuleInfoOffset = OFFSET_OF (PRM_ACPI_DESCRIPTION_TABLE, PrmModuleInfoStructure);
PrmAcpiTable->PrmModuleInfoCount = mPrmModuleCount;
PrmAcpiTable->PrmModuleInfoCount = (UINT32) mPrmModuleCount;
//
// Iterate across all PRM Modules on the list
//
CurrentModuleInfoStruct = &PrmAcpiTable->PrmModuleInfoStructure[0];
EFI_LIST_FOR_EACH(Link, &mPrmModuleList)
{
TempListEntry = CR(Link, PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY, Link, PRM_MODULE_IMAGE_CONTEXT_LIST_ENTRY_SIGNATURE);
CurrentImageAddress = TempListEntry->Context->PeCoffImageContext.ImageAddress;
CurrentImageExportDirectory = TempListEntry->Context->ExportDirectory;
CurrentExportDescriptorStruct = TempListEntry->Context->ExportDescriptor;
for (
CurrentPrmModuleImageContext = NULL, Status = GetNextPrmModuleEntry (&CurrentPrmModuleImageContext);
!EFI_ERROR (Status);
Status = GetNextPrmModuleEntry (&CurrentPrmModuleImageContext)) {
CurrentImageAddress = CurrentPrmModuleImageContext->PeCoffImageContext.ImageAddress;
CurrentImageExportDirectory = CurrentPrmModuleImageContext->ExportDirectory;
CurrentExportDescriptorStruct = CurrentPrmModuleImageContext->ExportDescriptor;
CurrentModuleAcpiParamDescriptors = NULL;
DEBUG ((
@ -703,7 +141,7 @@ ProcessPrmModules (
CurrentModuleInfoStruct->MinorRevision = 0;
Status = GetImageVersionInPeCoffImage (
(VOID *) (UINTN) CurrentImageAddress,
&TempListEntry->Context->PeCoffImageContext,
&CurrentPrmModuleImageContext->PeCoffImageContext,
&CurrentModuleInfoStruct->MajorRevision,
&CurrentModuleInfoStruct->MinorRevision
);
@ -863,9 +301,7 @@ PrmLoaderEndOfDxeNotification (
DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
InitializeListHead (&mPrmModuleList);
Status = DiscoverPrmModules ();
Status = DiscoverPrmModules (&mPrmModuleCount, &mPrmHandlerCount);
ASSERT_EFI_ERROR (Status);
Status = ProcessPrmModules (&PrmAcpiDescriptionTable);

5
PrmPkg/PrmLoaderDxe/PrmLoaderDxe.inf
View File

@ -22,7 +22,6 @@
[Sources]
PrmAcpiTable.h
PrmLoader.h
PrmLoaderDxe.c
[Packages]
@ -39,8 +38,9 @@
DebugLib
MemoryAllocationLib
PcdLib
PeCoffLib
PrmContextBufferLib
PrmModuleDiscoveryLib
PrmPeCoffLib
UefiBootServicesTableLib
UefiDriverEntryPoint
UefiLib
@ -54,7 +54,6 @@
[Protocols]
gEfiAcpiTableProtocolGuid
gEfiLoadedImageProtocolGuid
gPrmConfigProtocolGuid
[Depex]

8
PrmPkg/PrmPkg.dec
View File

@ -36,6 +36,14 @@
#
PrmContextBufferLib|Include/Library/PrmContextBufferLib.h
## @libraryclass Provides functionality to discover PRM modules installed by platform firmware
#
PrmModuleDiscoveryLib|Include/Library/PrmModuleDiscoveryLib.h
## @libraryclass Provides additional PE/COFF functionality needed to support the Platform Runtime Mechanism (PRM) loader driver.
#
PrmPeCoffLib|Include/Library/PrmPeCoffLib.h
[Protocols]
## PRM Configuration Protocol
#

13
PrmPkg/PrmPkg.dsc
View File

@ -55,6 +55,9 @@
# PRM Package
#
PrmContextBufferLib|$(PLATFORM_PACKAGE)/Library/DxePrmContextBufferLib/DxePrmContextBufferLib.inf
PrmModuleDiscoveryLib|$(PLATFORM_PACKAGE)/Library/DxePrmModuleDiscoveryLib/DxePrmModuleDiscoveryLib.inf
PrmPeCoffLib|$(PLATFORM_PACKAGE)/Library/DxePrmPeCoffLib/DxePrmPeCoffLib.inf
###################################################################################################
#
@ -72,6 +75,16 @@
$(PLATFORM_PACKAGE)/Samples/PrmSampleContextBufferModule/Library/DxeContextBufferModuleConfigLib/DxeContextBufferModuleConfigLib.inf
$(PLATFORM_PACKAGE)/Samples/PrmSampleHardwareAccessModule/Library/DxeHardwareAccessModuleConfigLib/DxeHardwareAccessModuleConfigLib.inf
#
# PRM Module Discovery Library
#
$(PLATFORM_PACKAGE)/Library/DxePrmModuleDiscoveryLib/DxePrmModuleDiscoveryLib.inf
#
# PRM PE/COFF Library
#
$(PLATFORM_PACKAGE)/Library/DxePrmPeCoffLib/DxePrmPeCoffLib.inf
#
# PRM Configuration Driver
#