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Fixes ncroxon#11 Signed-off-by: Callum Farmer <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,185 @@ | ||
| /* SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause */ | ||
| /* | ||
| * crt0-efi-riscv64-local.S - PE/COFF header for RISC-V 64 EFI applications (without suitable objcopy) | ||
| * | ||
| * Copyright (C) 2014 Linaro Ltd. <[email protected]> | ||
| * Copyright (C) 2018 Alexander Graf <[email protected]> | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
||
| .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 | ||
|
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||
| .4byte _image_end - ImageBase // SizeOfImage | ||
|
|
||
| // Everything before the kernel image is considered part of the header | ||
| .4byte _text - ImageBase // SizeOfHeaders | ||
| .4byte 0 // CheckSum | ||
| .2byte 0 // 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) | ||
|
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||
| /* | ||
| * 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) | ||
|
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||
| .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) | ||
|
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||
| .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) | ||
| call _entry | ||
| ld ra, 16(sp) | ||
| 0: addi sp, sp, 24 | ||
| ret | ||
|
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| // hand-craft a dummy .reloc section so EFI knows it's a relocatable executable: | ||
|
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| .data | ||
| dummy: .4byte 0 | ||
|
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| #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 |
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