--
Thanks,
Chao
------------------------

On 4月 8 2022, at 5:38 下午, "Chang, Abner (HPS SW/FW Technologist)" <abner.chang@hpe.com> wrote:
>
>
> > -----Original Message-----
> > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Chao Li
> > Sent: Wednesday, February 9, 2022 2:56 PM
> > To: devel@edk2.groups.io
> > Cc: Michael D Kinney <michael.d.kinney@intel.com>; Liming Gao
> > <gaoliming@byosoft.com.cn>; Zhiguang Liu <zhiguang.liu@intel.com>; Baoqi
> > Zhang <zhangbaoqi@loongson.cn>
> > Subject: [edk2-devel] [staging/LoongArch RESEND PATCH v1 24/33]
> > MdePkg/BasePeCoff: Add LoongArch PE/Coff related code.
> >
> > Add LoongArch image relocation.
> >
> > Cc: Michael D Kinney <michael.d.kinney@intel.com>
> > Cc: Liming Gao <gaoliming@byosoft.com.cn>
> > Cc: Zhiguang Liu <zhiguang.liu@intel.com>
> >
> > Signed-off-by: Chao Li <lichao@loongson.cn>
> > Co-authored-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
> > ---
> > MdePkg/Library/BasePeCoffLib/BasePeCoff.c | 3 +-
> > .../Library/BasePeCoffLib/BasePeCoffLib.inf | 5 +
> > .../Library/BasePeCoffLib/BasePeCoffLib.uni | 2 +
> > .../BasePeCoffLib/LoongArch/PeCoffLoaderEx.c | 132
> > ++++++++++++++++++
> > 4 files changed, 141 insertions(+), 1 deletion(-)
> > create mode 100644
> > MdePkg/Library/BasePeCoffLib/LoongArch/PeCoffLoaderEx.c
> >
> > diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
> > b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
> > index 6d8d9faeb8..97a8aaf8c7 100644
> > --- a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
> > +++ b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
> > @@ -1,6 +1,6 @@
> > /** @file
> > Base PE/COFF loader supports loading any PE32/PE32+ or TE image, but
> > - only supports relocating IA32, x64, IPF, ARM, RISC-V and EBC images.
> > + only supports relocating IA32, x64, IPF, ARM, RISC-V, LoongArch and EBC
> > images.
> >
> > Caution: This file requires additional review when modified.
> > This library will have external input - PE/COFF image.
> > @@ -18,6 +18,7 @@
> > Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
> > Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
> > Portions Copyright (c) 2020, Hewlett Packard Enterprise Development LP.
> > All rights reserved.<BR>
> > + Portions Copyright (c) 2022, Loongson Technology Corporation Limited. All
> > rights reserved.<BR>
> > SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> > **/
> > diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
> > b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
> > index 110b6d5a09..3b8b8eb191 100644
> > --- a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
> > +++ b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
> > @@ -4,6 +4,7 @@
> > # The IA32 version library support loading IA32, X64 and EBC PE/COFF images.
> > # The X64 version library support loading IA32, X64 and EBC PE/COFF images.
> > # The RISC-V version library support loading RISC-V images.
> > +# The LoongArch version library support loading LoongArch images.
> > #
> > # Caution: This module requires additional review when modified.
> > # This library will have external input - PE/COFF image.
> > @@ -13,6 +14,7 @@
> > # Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
> > # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
> > # Portions Copyright (c) 2020, Hewlett Packard Enterprise Development LP.
> > All rights reserved.<BR>
> > +# Portions Copyright (c) 2022, Loongson Technology Corporation Limited. All
> > rights reserved.<BR>
> > #
> > # SPDX-License-Identifier: BSD-2-Clause-Patent
> > #
> > @@ -46,6 +48,9 @@
> > [Sources.RISCV64]
> > RiscV/PeCoffLoaderEx.c
> >
> > +[Sources.LOONGARCH64]
> > + LoongArch/PeCoffLoaderEx.c
> > +
> > [Packages]
> > MdePkg/MdePkg.dec
> >
> > diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
> > b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
> > index 55417029f2..1f731344e1 100644
> > --- a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
> > +++ b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
> > @@ -5,6 +5,7 @@
> > // The IA32 version library support loading IA32, X64 and EBC PE/COFF
> > images.
> > // The X64 version library support loading IA32, X64 and EBC PE/COFF images.
> > // The RISC-V version library support loading RISC-V32 and RISC-V64 PE/COFF
> > images.
> > +// The LoongArch version library support loading LoongArch32 and
> > LoongArch64 PE/COFF images.
> > //
> > // Caution: This module requires additional review when modified.
> > // This library will have external input - PE/COFF image.
> > @@ -14,6 +15,7 @@
> > // Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
> > // Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
> > // Portions Copyright (c) 2020, Hewlett Packard Enterprise Development LP.
> > All rights reserved.<BR>
> > +// Portions Copyright (c) 2022, Loongson Technology Corporation Limited.
> > All rights reserved.<BR>
> > //
> > // SPDX-License-Identifier: BSD-2-Clause-Patent
> > //
> > diff --git a/MdePkg/Library/BasePeCoffLib/LoongArch/PeCoffLoaderEx.c
> > b/MdePkg/Library/BasePeCoffLib/LoongArch/PeCoffLoaderEx.c
> > new file mode 100644
> > index 0000000000..ec572c2dd6
> > --- /dev/null
> > +++ b/MdePkg/Library/BasePeCoffLib/LoongArch/PeCoffLoaderEx.c
> > @@ -0,0 +1,132 @@
> > +/** @file
> > + PE/Coff loader for LoongArch PE image
> > +
> > + Copyright (c) 2022, Loongson Technology Corporation Limited. All rights
> > reserved.<BR>
> > +
> > + SPDX-License-Identifier: BSD-2-Clause-Patent
> > +**/
> > +
> > +#include "BasePeCoffLibInternals.h"
> > +#include <Library/BaseLib.h>
> > +
> > +/**
> > + Performs an LoongArch specific relocation fixup and is a no-op on other
> > + instruction sets.
> > +
> > + @param Reloc Pointer to the relocation record.
> > + @param Fixup Pointer to the address to fix up.
> > + @param FixupData Pointer to a buffer to log the fixups.
> > + @param Adjust The offset to adjust the fixup.
> > +
> > + @return Status code.
> > +
> > +**/
> > +RETURN_STATUS
> > +PeCoffLoaderRelocateImageEx (
> > + IN UINT16 *Reloc,
> > + IN OUT CHAR8 *Fixup,
> > + IN OUT CHAR8 **FixupData,
> > + IN UINT64 Adjust
> > + )
> > +{
> > + UINT8 RelocType;
> > + UINT64 Value = 0;
> > + UINT64 Tmp1 = 0;
> > + UINT64 Tmp2 = 0;
> > +
> > + RelocType = (*Reloc) >> 12;
> > +
> > + switch (RelocType) {
> > + case EFI_IMAGE_REL_BASED_LOONGARCH64_MARK_LA:
> > + Value = (*(UINT32*)Fixup & 0x1ffffe0) << 7 | /* lu12i.w 20bits from
> > bit5 */
> > + (*((UINT32*)Fixup + 1) & 0x3ffc00) >> 10; /* ori 12bits from bit10 */
> > + Tmp1 = *((UINT32*)Fixup + 2) & 0x1ffffe0; /* lu32i.d 20bits from bit5
> > */
> > + Tmp2 = *((UINT32*)Fixup + 3) & 0x3ffc00; /* lu52i.d 12bits from
> > bit10 */
> > + Value = Value | (Tmp1 << 27) | (Tmp2 << 42);
> > + Value += Adjust;
> Please use double back slash for the comments in the function in this file.
>
> Abner
Chao: Okay, I will revise it in the next version.
> +
> + *(UINT32*)Fixup = (*(UINT32*)Fixup & ~0x1ffffe0) | (((Value >> 12) &
> 0xfffff) << 5);
> + if (*FixupData != NULL) {
> + *FixupData = ALIGN_POINTER (*FixupData, sizeof (UINT32));
> + *(UINT32 *) (*FixupData) = *(UINT32*)Fixup;
> + *FixupData = *FixupData + sizeof (UINT32);
> + }
> +
> + Fixup += sizeof(UINT32);
> + *(UINT32*)Fixup = (*(UINT32*)Fixup & ~0x3ffc00) | ((Value & 0xfff) <<
> 10);
> + if (*FixupData != NULL) {
> + *FixupData = ALIGN_POINTER (*FixupData, sizeof (UINT32));
> + *(UINT32 *) (*FixupData) = *(UINT32*)Fixup;
> + *FixupData = *FixupData + sizeof (UINT32);
> + }
> +
> + Fixup += sizeof(UINT32);
> + *(UINT32*)Fixup = (*(UINT32*)Fixup & ~0x1ffffe0) | (((Value >> 32) &
> 0xfffff) << 5);
> + if (*FixupData != NULL) {
> + *FixupData = ALIGN_POINTER (*FixupData, sizeof (UINT32));
> + *(UINT32 *) (*FixupData) = *(UINT32*)Fixup;
> + *FixupData = *FixupData + sizeof (UINT32);
> + }
> +
> + Fixup += sizeof(UINT32);
> + *(UINT32*)Fixup = (*(UINT32*)Fixup & ~0x3ffc00) | (((Value >> 52) &
> 0xfff) << 10);
> + if (*FixupData != NULL) {
> + *FixupData = ALIGN_POINTER (*FixupData, sizeof (UINT32));
> + *(UINT32 *) (*FixupData) = *(UINT32*)Fixup;
> + *FixupData = *FixupData + sizeof (UINT32);
> + }
> + break;
> + default:
> + return RETURN_UNSUPPORTED;
> + }
> +
> + return RETURN_SUCCESS;
> +}
> +
> +/**
> + Returns TRUE if the machine type of PE/COFF image is supported.
> Supported
> + does not mean the image can be executed it means the PE/COFF loader
> supports
> + loading and relocating of the image type. It's up to the caller to support
> + the entry point.
> +
> + @param Machine Machine type from the PE Header.
> +
> + @return TRUE if this PE/COFF loader can load the image
> +
> +**/
> +BOOLEAN
> +PeCoffLoaderImageFormatSupported (
> + IN UINT16 Machine
> + )
> +{
> + if (Machine == IMAGE_FILE_MACHINE_LOONGARCH64) {
> + return TRUE;
> + }
> +
> + return FALSE;
> +}
> +
> +/**
> + Performs an LOONGARCH-based specific re-relocation fixup and is a no-op
> on other
> + instruction sets. This is used to re-relocated the image into the EFI virtual
> + space for runtime calls.
> +
> + @param Reloc The pointer to the relocation record.
> + @param Fixup The pointer to the address to fix up.
> + @param FixupData The pointer to a buffer to log the fixups.
> + @param Adjust The offset to adjust the fixup.
> +
> + @return Status code.
> +
> +**/
> +RETURN_STATUS
> +PeHotRelocateImageEx (
> + IN UINT16 *Reloc,
> + IN OUT CHAR8 *Fixup,
> + IN OUT CHAR8 **FixupData,
> + IN UINT64 Adjust
> + )
> +{
> + /* to check */
> + return PeCoffLoaderRelocateImageEx (Reloc, Fixup, FixupData, Adjust);
> +}
> --
> 2.27.0
>
>
>
> 
>