| /* SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause */ |
| /* |
| * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> |
| * Copright (C) 2018 Alexander Graf <agraf@suse.de> |
| * |
| * 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 and this list of conditions, without modification. |
| * 2. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License as published by the Free Software Foundation; |
| * either version 2 of the License, or (at your option) any later version. |
| */ |
| |
| #ifndef EFI_SUBSYSTEM |
| #define EFI_SUBSYSTEM 10 |
| #endif |
| |
| .section .text.head |
| |
| /* |
| * Magic "MZ" signature for PE/COFF |
| */ |
| .globl ImageBase |
| ImageBase: |
| .ascii "MZ" |
| .skip 58 // 'MZ' + pad + offset == 64 |
| .4byte pe_header - ImageBase // Offset to the PE header. |
| pe_header: |
| .ascii "PE" |
| .2byte 0 |
| coff_header: |
| .2byte 0x5064 // riscv64 |
| .2byte 4 // nr_sections |
| .4byte 0 // TimeDateStamp |
| .4byte 0 // PointerToSymbolTable |
| .4byte 0 // NumberOfSymbols |
| .2byte section_table - optional_header // SizeOfOptionalHeader |
| .2byte 0x206 // Characteristics. |
| // IMAGE_FILE_DEBUG_STRIPPED | |
| // IMAGE_FILE_EXECUTABLE_IMAGE | |
| // IMAGE_FILE_LINE_NUMS_STRIPPED |
| optional_header: |
| .2byte 0x20b // PE32+ format |
| .byte 0x02 // MajorLinkerVersion |
| .byte 0x14 // MinorLinkerVersion |
| .4byte _text_size - ImageBase // SizeOfCode |
| .4byte _alldata_size - ImageBase // SizeOfInitializedData |
| .4byte 0 // SizeOfUninitializedData |
| .4byte _start - ImageBase // AddressOfEntryPoint |
| .4byte _text - ImageBase // BaseOfCode |
| |
| extra_header_fields: |
| .8byte 0 // ImageBase |
| .4byte 0x1000 // SectionAlignment |
| .4byte 0x1000 // FileAlignment |
| .2byte 0 // MajorOperatingSystemVersion |
| .2byte 0 // MinorOperatingSystemVersion |
| .2byte 0 // MajorImageVersion |
| .2byte 0 // MinorImageVersion |
| .2byte 0 // MajorSubsystemVersion |
| .2byte 0 // MinorSubsystemVersion |
| .4byte 0 // Win32VersionValue |
| |
| .4byte _image_end - ImageBase // SizeOfImage |
| |
| // Everything before the kernel image is considered part of the header |
| .4byte _text - ImageBase // SizeOfHeaders |
| .4byte 0 // CheckSum |
| .2byte EFI_SUBSYSTEM // Subsystem |
| .2byte 0 // DllCharacteristics |
| .8byte 0 // SizeOfStackReserve |
| .8byte 0 // SizeOfStackCommit |
| .8byte 0 // SizeOfHeapReserve |
| .8byte 0 // SizeOfHeapCommit |
| .4byte 0 // LoaderFlags |
| .4byte 0x10 // NumberOfRvaAndSizes |
| |
| .8byte 0 // ExportTable |
| .8byte 0 // ImportTable |
| .8byte 0 // ResourceTable |
| .8byte 0 // ExceptionTable |
| .8byte 0 // CertificationTable |
| .4byte _reloc - ImageBase // BaseRelocationTable (VirtualAddress) |
| .4byte _reloc_vsize - ImageBase // BaseRelocationTable (Size) |
| .8byte 0 // Debug |
| .8byte 0 // Architecture |
| .8byte 0 // Global Ptr |
| .8byte 0 // TLS Table |
| .8byte 0 // Load Config Table |
| .8byte 0 // Bound Import |
| .8byte 0 // IAT |
| .8byte 0 // Delay Import Descriptor |
| .8byte 0 // CLR Runtime Header |
| .8byte 0 // Reserved, must be zero |
| |
| // Section table |
| section_table: |
| |
| .ascii ".text\0\0\0" |
| .4byte _text_vsize - ImageBase // VirtualSize |
| .4byte _text - ImageBase // VirtualAddress |
| .4byte _text_size - ImageBase // SizeOfRawData |
| .4byte _text - ImageBase // PointerToRawData |
| .4byte 0 // PointerToRelocations (0 for executables) |
| .4byte 0 // PointerToLineNumbers (0 for executables) |
| .2byte 0 // NumberOfRelocations (0 for executables) |
| .2byte 0 // NumberOfLineNumbers (0 for executables) |
| .4byte 0x60000020 // Characteristics (section flags) |
| |
| /* |
| * 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\0\0" |
| .4byte _reloc_vsize - ImageBase // VirtualSize |
| .4byte _reloc - ImageBase // VirtualAddress |
| .4byte _reloc_size - ImageBase // SizeOfRawData |
| .4byte _reloc - ImageBase // PointerToRawData |
| .4byte 0 // PointerToRelocations |
| .4byte 0 // PointerToLineNumbers |
| .2byte 0 // NumberOfRelocations |
| .2byte 0 // NumberOfLineNumbers |
| .4byte 0x42000040 // Characteristics (section flags) |
| |
| .ascii ".data\0\0\0" |
| .4byte _data_vsize - ImageBase // VirtualSize |
| .4byte _data - ImageBase // VirtualAddress |
| .4byte _data_size - ImageBase // SizeOfRawData |
| .4byte _data - ImageBase // PointerToRawData |
| .4byte 0 // PointerToRelocations |
| .4byte 0 // PointerToLineNumbers |
| .2byte 0 // NumberOfRelocations |
| .2byte 0 // NumberOfLineNumbers |
| .4byte 0xC0000040 // Characteristics (section flags) |
| |
| .ascii ".rodata\0" |
| .4byte _rodata_vsize - ImageBase // VirtualSize |
| .4byte _rodata - ImageBase // VirtualAddress |
| .4byte _rodata_size - ImageBase // SizeOfRawData |
| .4byte _rodata - ImageBase // PointerToRawData |
| .4byte 0 // PointerToRelocations |
| .4byte 0 // PointerToLineNumbers |
| .2byte 0 // NumberOfRelocations |
| .2byte 0 // NumberOfLineNumbers |
| .4byte 0x40000040 // Characteristics (section flags) |
| |
| .text |
| .globl _start |
| .type _start,%function |
| _start: |
| addi sp, sp, -24 |
| sd a0, 0(sp) |
| sd a1, 8(sp) |
| sd ra, 16(sp) |
| lla a0, ImageBase |
| lla a1, _DYNAMIC |
| call _relocate |
| bne a0, zero, 0f |
| ld a1, 8(sp) |
| ld a0, 0(sp) |
| |
| /* Switch to our own stack */ |
| mv a2, sp |
| la sp, stacktop |
| mv fp, zero |
| push_fp zero |
| addi sp, sp, -16 |
| sd a2, 0(sp) |
| |
| call efi_main |
| |
| /* Restore sp */ |
| ld sp, 0(sp) |
| |
| ld ra, 16(sp) |
| 0: addi sp, sp, 24 |
| ret |
| |
| // hand-craft a dummy .reloc section so EFI knows it's a relocatable executable: |
| |
| .data |
| |
| .balign 16384 |
| .space 16384 |
| stacktop: |
| |
| dummy: .4byte 0 |
| |
| #define IMAGE_REL_ABSOLUTE 0 |
| .section .reloc, "a" |
| label1: |
| .4byte dummy-label1 // Page RVA |
| .4byte 12 // Block Size (2*4+2*2), must be aligned by 32 Bits |
| .2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy |
| .2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy |
| |
| #if defined(__ELF__) && defined(__linux__) |
| .section .note.GNU-stack,"",%progbits |
| #endif |
