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216459d2cf
The fields SizeOfCode, SizeOfInitializedData, and SizeOfUninitializedData are define in the PE-COFF specification [1]. * SizeOfCode must match the size of all .text sections. * SizeOfInitializedData must match the size of all .data sections. * SizeOfUninitializedData must match the size of all .bss sections. We only have one .text and one .data section. SizeOfCode and SizeOfInitializedData have to be calculated as the difference between the end and the start of the respective section. As we don't have any .bss sections in the generated EFI binaries. SizeOfUninitializedData must remain 0. [1] https://learn.microsoft.com/en-us/windows/win32/debug/pe-format Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
200 lines
5.7 KiB
ArmAsm
200 lines
5.7 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* crt0-efi-riscv.S - PE/COFF header for RISC-V EFI applications
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*
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* Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
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* Copright (C) 2018 Alexander Graf <agraf@suse.de>
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*
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* This file is inspired by arch/arm/lib/crt0_aarch64_efi.S
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*/
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#include <asm-generic/pe.h>
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#if __riscv_xlen == 64
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#define SIZE_LONG 8
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#define SAVE_LONG(reg, idx) sd reg, (idx*SIZE_LONG)(sp)
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#define LOAD_LONG(reg, idx) ld reg, (idx*SIZE_LONG)(sp)
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#define PE_MACHINE IMAGE_FILE_MACHINE_RISCV64
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#define PE_MAGIC IMAGE_NT_OPTIONAL_HDR64_MAGIC
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#define IMG_CHARACTERISTICS \
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(IMAGE_FILE_EXECUTABLE_IMAGE | \
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IMAGE_FILE_LINE_NUMS_STRIPPED | \
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IMAGE_FILE_LOCAL_SYMS_STRIPPED | \
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IMAGE_FILE_LARGE_ADDRESS_AWARE | \
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IMAGE_FILE_DEBUG_STRIPPED)
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#else
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#define SIZE_LONG 4
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#define SAVE_LONG(reg, idx) sw reg, (idx*SIZE_LONG)(sp)
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#define LOAD_LONG(reg, idx) lw reg, (idx*SIZE_LONG)(sp)
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#define PE_MACHINE IMAGE_FILE_MACHINE_RISCV32
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#define PE_MAGIC IMAGE_NT_OPTIONAL_HDR32_MAGIC
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#define IMG_CHARACTERISTICS \
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(IMAGE_FILE_EXECUTABLE_IMAGE | \
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IMAGE_FILE_LINE_NUMS_STRIPPED | \
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IMAGE_FILE_LOCAL_SYMS_STRIPPED | \
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IMAGE_FILE_DEBUG_STRIPPED)
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#endif
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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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.short IMAGE_DOS_SIGNATURE /* 'MZ' */
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.skip 46 /* 'MZ' + pad + offset == 64 */
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.long 0x43534952 /* Linux magic "RISCV */
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.long 0x00000056
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.long 0x05435352 /* Linux magic2 "RSC\x05*/
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.long pe_header - ImageBase /* Offset to the PE header */
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pe_header:
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.long IMAGE_NT_SIGNATURE /* 'PE' */
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coff_header:
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.short PE_MACHINE /* RISC-V 64/32-bit */
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.short 3 /* nr_sections */
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.long 0 /* TimeDateStamp */
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.long 0 /* PointerToSymbolTable */
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.long 0 /* NumberOfSymbols */
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.short section_table - optional_header /* SizeOfOptionalHeader */
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.short IMG_CHARACTERISTICS /* Characteristics */
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optional_header:
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.short PE_MAGIC /* PE32(+) format */
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.byte 0x02 /* MajorLinkerVersion */
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.byte 0x14 /* MinorLinkerVersion */
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.long _etext - _start /* SizeOfCode */
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.long _data_size /* 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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#if __riscv_xlen == 32
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.long 0 /* BaseOfData */
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#endif
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extra_header_fields:
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#if __riscv_xlen == 32
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.long 0 /* ImageBase */
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#else
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.quad 0 /* ImageBase */
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#endif
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.long 0x200 /* SectionAlignment */
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.long 0x200 /* FileAlignment */
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.short 0 /* MajorOperatingSystemVersion */
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.short 0 /* MinorOperatingSystemVersion */
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.short 1 /* 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 IMAGE_SUBSYSTEM_EFI_APPLICATION /* Subsystem */
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#if CONFIG_VENDOR_EFI
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.short 0 /* DllCharacteristics */
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#else
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.short IMAGE_DLLCHARACTERISTICS_NX_COMPAT
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#endif
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#if __riscv_xlen == 32
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.long 0 /* SizeOfStackReserve */
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.long 0 /* SizeOfStackCommit */
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.long 0 /* SizeOfHeapReserve */
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.long 0 /* SizeOfHeapCommit */
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#else
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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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#endif
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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 _etext - _start /* VirtualSize */
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.long _start - ImageBase /* VirtualAddress */
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.long _etext - _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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/* Characteristics (section flags) */
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.long (IMAGE_SCN_MEM_READ | \
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IMAGE_SCN_MEM_EXECUTE | \
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IMAGE_SCN_CNT_CODE)
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.ascii ".data"
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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 - _data /* VirtualSize */
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.long _data - ImageBase /* VirtualAddress */
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.long _edata - _data /* SizeOfRawData */
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.long _data - ImageBase /* 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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/* Characteristics (section flags) */
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.long (IMAGE_SCN_MEM_WRITE | \
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IMAGE_SCN_MEM_READ | \
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IMAGE_SCN_CNT_INITIALIZED_DATA)
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.align 12
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_start:
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addi sp, sp, -(SIZE_LONG * 3)
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SAVE_LONG(a0, 0)
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SAVE_LONG(a1, 1)
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SAVE_LONG(ra, 2)
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lla a0, ImageBase
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lla a1, _DYNAMIC
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call _relocate
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bne a0, zero, 0f
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LOAD_LONG(a1, 1)
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LOAD_LONG(a0, 0)
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call efi_main
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LOAD_LONG(ra, 2)
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0: addi sp, sp, (SIZE_LONG * 3)
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ret
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