efi: arm: Add aarch64 EFI app support
Add support for EFI apps on aarch64. This includes start-up and relocation code plus a link script. Signed-off-by: Simon Glass <sjg@chromium.org> [agraf: add kconfig dep] Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Simon Glass
Alexander Graf
parent
dd46eef2f6
commit
c65d76ed5f
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@ -8,3 +8,7 @@ PLATFORM_RELFLAGS += -fno-common -ffixed-x18
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PF_NO_UNALIGNED := $(call cc-option, -mstrict-align)
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PF_NO_UNALIGNED := $(call cc-option, -mstrict-align)
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PLATFORM_CPPFLAGS += $(PF_NO_UNALIGNED)
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PLATFORM_CPPFLAGS += $(PF_NO_UNALIGNED)
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EFI_LDS := elf_aarch64_efi.lds
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EFI_CRT0 := crt0_aarch64_efi.o
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EFI_RELOC := reloc_aarch64_efi.o
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@ -0,0 +1,135 @@
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/*
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* crt0-efi-aarch64.S - PE/COFF header for aarch64 EFI applications
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*
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* Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
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*
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* SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause
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*
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* This file is taken and modified from the gnu-efi project.
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*/
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.section .text.head
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/*
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* Magic "MZ" signature for PE/COFF
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*/
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.globl ImageBase
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ImageBase:
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.ascii "MZ"
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.skip 58 /* 'MZ' + pad + offset == 64 */
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.long pe_header - ImageBase /* Offset to the PE header */
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pe_header:
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.ascii "PE"
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.short 0
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coff_header:
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.short 0xaa64 /* AArch64 */
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.short 2 /* nr_sections */
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.long 0 /* TimeDateStamp */
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.long 0 /* PointerToSymbolTable */
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.long 1 /* NumberOfSymbols */
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.short section_table - optional_header /* SizeOfOptionalHeader */
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/*
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* Characteristics: IMAGE_FILE_DEBUG_STRIPPED |
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* IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_LINE_NUMS_STRIPPED
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*/
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.short 0x206
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optional_header:
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.short 0x20b /* PE32+ format */
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.byte 0x02 /* MajorLinkerVersion */
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.byte 0x14 /* MinorLinkerVersion */
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.long _edata - _start /* SizeOfCode */
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.long 0 /* SizeOfInitializedData */
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.long 0 /* SizeOfUninitializedData */
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.long _start - ImageBase /* AddressOfEntryPoint */
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.long _start - ImageBase /* BaseOfCode */
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extra_header_fields:
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.quad 0 /* ImageBase */
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.long 0x20 /* SectionAlignment */
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.long 0x8 /* FileAlignment */
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.short 0 /* MajorOperatingSystemVersion */
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.short 0 /* MinorOperatingSystemVersion */
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.short 0 /* MajorImageVersion */
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.short 0 /* MinorImageVersion */
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.short 0 /* MajorSubsystemVersion */
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.short 0 /* MinorSubsystemVersion */
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.long 0 /* Win32VersionValue */
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.long _edata - ImageBase /* SizeOfImage */
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/*
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* Everything before the kernel image is considered part of the header
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*/
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.long _start - ImageBase /* SizeOfHeaders */
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.long 0 /* CheckSum */
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.short EFI_SUBSYSTEM /* Subsystem */
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.short 0 /* DllCharacteristics */
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.quad 0 /* SizeOfStackReserve */
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.quad 0 /* SizeOfStackCommit */
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.quad 0 /* SizeOfHeapReserve */
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.quad 0 /* SizeOfHeapCommit */
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.long 0 /* LoaderFlags */
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.long 0x6 /* NumberOfRvaAndSizes */
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.quad 0 /* ExportTable */
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.quad 0 /* ImportTable */
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.quad 0 /* ResourceTable */
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.quad 0 /* ExceptionTable */
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.quad 0 /* CertificationTable */
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.quad 0 /* BaseRelocationTable */
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/* Section table */
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section_table:
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/*
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* The EFI application loader requires a relocation section
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* because EFI applications must be relocatable. This is a
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* dummy section as far as we are concerned.
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*/
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.ascii ".reloc"
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.byte 0
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.byte 0 /* end of 0 padding of section name */
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.long 0
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.long 0
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.long 0 /* SizeOfRawData */
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.long 0 /* PointerToRawData */
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.long 0 /* PointerToRelocations */
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.long 0 /* PointerToLineNumbers */
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.short 0 /* NumberOfRelocations */
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.short 0 /* NumberOfLineNumbers */
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.long 0x42100040 /* Characteristics (section flags) */
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.ascii ".text"
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.byte 0
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.byte 0
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.byte 0 /* end of 0 padding of section name */
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.long _edata - _start /* VirtualSize */
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.long _start - ImageBase /* VirtualAddress */
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.long _edata - _start /* SizeOfRawData */
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.long _start - ImageBase /* PointerToRawData */
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.long 0 /* PointerToRelocations (0 for executables) */
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.long 0 /* PointerToLineNumbers (0 for executables) */
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.short 0 /* NumberOfRelocations (0 for executables) */
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.short 0 /* NumberOfLineNumbers (0 for executables) */
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.long 0xe0500020 /* Characteristics (section flags) */
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_start:
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stp x29, x30, [sp, #-32]!
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mov x29, sp
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stp x0, x1, [sp, #16]
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mov x2, x0
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mov x3, x1
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adr x0, ImageBase
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adrp x1, _DYNAMIC
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add x1, x1, #:lo12:_DYNAMIC
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bl _relocate
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cbnz x0, 0f
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ldp x0, x1, [sp, #16]
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bl efi_main
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0: ldp x29, x30, [sp], #32
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ret
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@ -0,0 +1,70 @@
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/*
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* U-Boot aarch64 EFI linker script
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Modified from elf_aarch64_efi.lds in gnu-efi
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*/
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OUTPUT_FORMAT("elf64-littleaarch64", "elf64-littleaarch64", "elf64-littleaarch64")
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OUTPUT_ARCH(aarch64)
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ENTRY(_start)
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SECTIONS
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{
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.text 0x0 : {
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_text = .;
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*(.text.head)
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*(.text)
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*(.text.*)
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*(.gnu.linkonce.t.*)
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*(.srodata)
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*(.rodata*)
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. = ALIGN(16);
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}
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_etext = .;
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_text_size = . - _text;
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.dynamic : { *(.dynamic) }
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.data : {
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_data = .;
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*(.sdata)
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*(.data)
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*(.data1)
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*(.data.*)
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*(.got.plt)
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*(.got)
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/*
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* The EFI loader doesn't seem to like a .bss section, so we
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* stick it all into .data:
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*/
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. = ALIGN(16);
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_bss = .;
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*(.sbss)
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*(.scommon)
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*(.dynbss)
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*(.bss)
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*(.bss.*)
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*(COMMON)
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. = ALIGN(16);
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_bss_end = .;
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_edata = .;
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}
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.rela.dyn : { *(.rela.dyn) }
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.rela.plt : { *(.rela.plt) }
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.rela.got : { *(.rela.got) }
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.rela.data : { *(.rela.data) *(.rela.data*) }
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_data_size = . - _etext;
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. = ALIGN(4096);
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.dynsym : { *(.dynsym) }
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. = ALIGN(4096);
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.dynstr : { *(.dynstr) }
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. = ALIGN(4096);
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.note.gnu.build-id : { *(.note.gnu.build-id) }
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/DISCARD/ : {
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*(.rel.reloc)
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*(.eh_frame)
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*(.note.GNU-stack)
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}
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.comment 0 : { *(.comment) }
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}
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@ -0,0 +1,87 @@
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/* reloc_aarch64.c - position independent x86 ELF shared object relocator
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Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
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Copyright (C) 1999 Hewlett-Packard Co.
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Contributed by David Mosberger <davidm@hpl.hp.com>.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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* Neither the name of Hewlett-Packard Co. nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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#include <efi.h>
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#include <elf.h>
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efi_status_t _relocate(long ldbase, Elf64_Dyn *dyn, efi_handle_t image,
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struct efi_system_table *systab)
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{
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long relsz = 0, relent = 0;
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Elf64_Rela *rel = 0;
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unsigned long *addr;
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int i;
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for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
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switch (dyn[i].d_tag) {
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case DT_RELA:
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rel = (Elf64_Rela *)((ulong)dyn[i].d_un.d_ptr + ldbase);
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break;
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case DT_RELASZ:
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relsz = dyn[i].d_un.d_val;
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break;
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case DT_RELAENT:
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relent = dyn[i].d_un.d_val;
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break;
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default:
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break;
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}
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}
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if (!rel && relent == 0)
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return EFI_SUCCESS;
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if (!rel || relent == 0)
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return EFI_LOAD_ERROR;
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while (relsz > 0) {
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/* apply the relocs */
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switch (ELF64_R_TYPE(rel->r_info)) {
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case R_AARCH64_NONE:
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break;
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case R_AARCH64_RELATIVE:
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addr = (ulong *)(ldbase + rel->r_offset);
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*addr = ldbase + rel->r_addend;
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break;
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default:
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break;
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}
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rel = (Elf64_Rela *)((char *)rel + relent);
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relsz -= relent;
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}
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return EFI_SUCCESS;
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}
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@ -183,7 +183,7 @@ config CMD_BOOTEFI
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config CMD_BOOTEFI_HELLO
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config CMD_BOOTEFI_HELLO
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bool "Allow booting a standard EFI hello world for testing"
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bool "Allow booting a standard EFI hello world for testing"
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depends on CMD_BOOTEFI && ARM && !ARM64
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depends on CMD_BOOTEFI && ARM
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help
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help
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This adds a standard EFI hello world application to U-Boot so that
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This adds a standard EFI hello world application to U-Boot so that
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it can be used with the 'bootefi hello' command. This is useful
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it can be used with the 'bootefi hello' command. This is useful
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