You've already forked slimbootloader
mirror of
https://github.com/Dasharo/slimbootloader.git
synced 2026-03-06 15:26:20 -08:00
8d32ccbcdf
Current implementation only supports the case that ELF file doesn't reload. If the ELF file has to be reload (e.g.: to meet alignment requirement), SBL need copy it to a different location and run. Recently EDKII updated universal payload ELF image link script, and the new ELF text alignment was changed to 0x1000 from 0x40. Mostly the default file load location could not meet this requirement. So enhancement SBL to copy it to a new location for this case. Signed-off-by: Guo Dong <guo.dong@intel.com>
100 lines
3.5 KiB
C
100 lines
3.5 KiB
C
/** @file
|
|
|
|
Copyright (c) 2020 - 2025, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
#include <PiPei.h>
|
|
#include <Library/BaseLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/MemoryAllocationLib.h>
|
|
#include <Library/BootloaderCommonLib.h>
|
|
#include <Library/UniversalPayloadLib.h>
|
|
#include <Library/ElfLib.h>
|
|
|
|
//#undef DEBUG_VERBOSE
|
|
//#define DEBUG_VERBOSE DEBUG_INFO
|
|
|
|
|
|
/**
|
|
Load universal payload image into memory.
|
|
|
|
@param[in] ImageBase The universal payload image base
|
|
@param[out] PayloadInfo Pointer to receive payload related info
|
|
|
|
@retval EFI_SUCCESS The image was loaded successfully
|
|
EFI_ABORTED The image loading failed
|
|
EFI_UNSUPPORTED The relocation format is not supported
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
LoadElfPayload (
|
|
IN VOID *ImageBase,
|
|
OUT LOADED_PAYLOAD_INFO *PayloadInfo
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
ELF_IMAGE_CONTEXT Context;
|
|
UNIVERSAL_PAYLOAD_INFO_HEADER *PldInfo;
|
|
UINT16 ExtraDataCount;
|
|
UINT32 Index;
|
|
CHAR8 *SectionName;
|
|
UINTN Offset;
|
|
UINTN Size;
|
|
|
|
if ((ImageBase == NULL) || (PayloadInfo == NULL)) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
Status = ParseElfImage (ImageBase, &Context);
|
|
if (EFI_ERROR(Status)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
// Get UNIVERSAL_PAYLOAD_INFO and number of additional PLD sections.
|
|
PldInfo = NULL;
|
|
ExtraDataCount = 0;
|
|
ASSERT(Context.ShNum < MAX_ELF_SHNUM);
|
|
for (Index = 0; Index < Context.ShNum; Index++) {
|
|
Status = GetElfSectionName (&Context, Index, &SectionName);
|
|
if (EFI_ERROR(Status)) {
|
|
continue;
|
|
}
|
|
if (AsciiStrCmp(SectionName, UNIVERSAL_PAYLOAD_INFO_SEC_NAME) == 0) {
|
|
Status = GetElfSectionPos (&Context, Index, &Offset, &Size);
|
|
if (!EFI_ERROR(Status)) {
|
|
PldInfo = (UNIVERSAL_PAYLOAD_INFO_HEADER *)(Context.FileBase + Offset);
|
|
}
|
|
} else if (AsciiStrnCmp(SectionName, UNIVERSAL_PAYLOAD_EXTRA_SEC_NAME_PREFIX, UNIVERSAL_PAYLOAD_EXTRA_SEC_NAME_PREFIX_LENGTH) == 0) {
|
|
Status = GetElfSectionPos (&Context, Index, &Offset, &Size);
|
|
if (!EFI_ERROR (Status) && (ExtraDataCount < ARRAY_SIZE(PayloadInfo->LoadedImage))) {
|
|
AsciiStrCpyS (PayloadInfo->LoadedImage[ExtraDataCount].Identifier, sizeof(PayloadInfo->LoadedImage[ExtraDataCount].Identifier), SectionName + UNIVERSAL_PAYLOAD_EXTRA_SEC_NAME_PREFIX_LENGTH);
|
|
PayloadInfo->LoadedImage[ExtraDataCount].Base = (UINTN)(Context.FileBase + Offset);
|
|
PayloadInfo->LoadedImage[ExtraDataCount].Size = Size;
|
|
ExtraDataCount++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Context.ReloadRequired) {
|
|
Context.ImageAddress = AllocatePages (EFI_SIZE_TO_PAGES (Context.ImageSize));
|
|
}
|
|
|
|
// Load ELF into the required base
|
|
Status = LoadElfImage (&Context);
|
|
if (!EFI_ERROR(Status)) {
|
|
if ((PldInfo != NULL) && (PldInfo->Identifier == UNIVERSAL_PAYLOAD_IDENTIFIER)) {
|
|
CopyMem (&PayloadInfo->Info, PldInfo, sizeof(UNIVERSAL_PAYLOAD_INFO_HEADER));
|
|
PayloadInfo->ImageCount = ExtraDataCount;
|
|
}
|
|
PayloadInfo->Machine = (Context.EiClass == ELF_CLASS32) ? IMAGE_FILE_MACHINE_I386 : IMAGE_FILE_MACHINE_X64;
|
|
PayloadInfo->EntryPoint = Context.EntryPoint;
|
|
PayloadInfo->PayloadSize = Context.FileSize;
|
|
PayloadInfo->PayloadBase = (UINTN)Context.FileBase;
|
|
}
|
|
|
|
return Status;
|
|
}
|