/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2020 Mitchell Horne <mhorne@FreeBSD.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ .section .text.head /* * Magic "MZ" signature for PE/COFF */ .globl ImageBase ImageBase: .ascii "MZ" .skip 58 // 'MZ' + pad + offset == 64 .long pe_header - ImageBase // Offset to the PE header. pe_header: .ascii "PE" .short 0 coff_header: .short 0x5064 // RISCV64 .short 2 // nr_sections .long 0 // TimeDateStamp .long 0 // PointerToSymbolTable .long 0 // NumberOfSymbols .short section_table - optional_header // SizeOfOptionalHeader .short 0x20e // Characteristics. // IMAGE_FILE_DEBUG_STRIPPED | // IMAGE_FILE_EXECUTABLE_IMAGE | // IMAGE_FILE_LOCAL_SYMS_STRIPPED | // IMAGE_FILE_LINE_NUMS_STRIPPED optional_header: .short 0x20b // PE32+ format .byte 0x02 // MajorLinkerVersion .byte 0x14 // MinorLinkerVersion .long _edata - _start // SizeOfCode .long 0 // SizeOfInitializedData .long 0 // SizeOfUninitializedData .long _start - ImageBase // AddressOfEntryPoint .long _start - ImageBase // BaseOfCode extra_header_fields: .quad 0 // ImageBase .long 32 // SectionAlignment .long 8 // FileAlignment .short 0 // MajorOperatingSystemVersion .short 0 // MinorOperatingSystemVersion .short 0 // MajorImageVersion .short 0 // MinorImageVersion .short 0 // MajorSubsystemVersion .short 0 // MinorSubsystemVersion .long 0 // Win32VersionValue .long _edata - ImageBase // SizeOfImage // Everything before the kernel image is considered part of the header .long _start - ImageBase // SizeOfHeaders .long 0 // CheckSum .short 10 // Subsystem (EFI) .short 0 // DllCharacteristics .quad 0 // SizeOfStackReserve .quad 0 // SizeOfStackCommit .quad 0 // SizeOfHeapReserve .quad 0 // SizeOfHeapCommit .long 0 // LoaderFlags .long 16 // NumberOfRvaAndSizes .quad 0 // ExportTable .quad 0 // ImportTable .quad 0 // ResourceTable .quad 0 // ExceptionTable .quad 0 // CertificationTable .quad 0 // BaseRelocationTable .quad 0 // Debug .quad 0 // Architecture .quad 0 // Global Ptr .quad 0 // TLS Table .quad 0 // Load Config Table .quad 0 // Bound Import .quad 0 // IAT .quad 0 // Delay Import Descriptor .quad 0 // CLR Runtime Header .quad 0 // Reserved // Section table section_table: /* * The EFI application loader requires a relocation section * because EFI applications must be relocatable. This is a * dummy section as far as we are concerned. */ .ascii ".reloc" .byte 0 .byte 0 // end of 0 padding of section name .long 0 .long 0 .long 0 // SizeOfRawData .long 0 // PointerToRawData .long 0 // PointerToRelocations .long 0 // PointerToLineNumbers .short 0 // NumberOfRelocations .short 0 // NumberOfLineNumbers .long 0x42100040 // Characteristics (section flags) .ascii ".text" .byte 0 .byte 0 .byte 0 // end of 0 padding of section name .long _edata - _start // VirtualSize .long _start - ImageBase // VirtualAddress .long _edata - _start // SizeOfRawData .long _start - ImageBase // PointerToRawData .long 0 // PointerToRelocations (0 for executables) .long 0 // PointerToLineNumbers (0 for executables) .short 0 // NumberOfRelocations (0 for executables) .short 0 // NumberOfLineNumbers (0 for executables) .long 0xe0500020 // Characteristics (section flags) .globl _start _start: /* Save boot parameters to the stack */ addi sp, sp, -24 sd a0, 0(sp) sd a1, 8(sp) sd ra, 16(sp) /* Run relocation */ lla a0, ImageBase lla a1, _DYNAMIC call _relocate bne a0, zero, 0f /* Call EFI code */ ld a1, 8(sp) ld a0, 0(sp) call efi_main ld ra, 16(sp) 0: addi sp, sp, 24 ret
