/* * crt0-efi-arm.S - PE/COFF header for ARM EFI applications * * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.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 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 .long pe_header - ImageBase // Offset to the PE header. pe_header: .ascii "PE" .short 0 coff_header: .short 0x1c2 // Mixed ARM/Thumb .short 2 // nr_sections .long 0 // TimeDateStamp .long 0 // PointerToSymbolTable .long 1 // NumberOfSymbols .short section_table - optional_header // SizeOfOptionalHeader .short 0x306 // Characteristics. // IMAGE_FILE_32BIT_MACHINE | // IMAGE_FILE_DEBUG_STRIPPED | // IMAGE_FILE_EXECUTABLE_IMAGE | // IMAGE_FILE_LINE_NUMS_STRIPPED optional_header: .short 0x10b // 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 .long 0 // BaseOfData extra_header_fields: .long 0 // ImageBase .long 0x20 // SectionAlignment .long 0x8 // 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 .long 0 // SizeOfStackReserve .long 0 // SizeOfStackCommit .long 0 // SizeOfHeapReserve .long 0 // SizeOfHeapCommit .long 0 // LoaderFlags .long 0x6 // NumberOfRvaAndSizes .quad 0 // ExportTable .quad 0 // ImportTable .quad 0 // ResourceTable .quad 0 // ExceptionTable .quad 0 // CertificationTable .quad 0 // BaseRelocationTable // 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: stmfd sp!, {r0-r2, lr} mov r2, r0 mov r3, r1 adr r1, .L_DYNAMIC ldr r0, [r1] add r1, r0, r1 adr r0, ImageBase bl _relocate teq r0, #0 bne 0f ldmfd sp, {r0-r1} bl efi_main 0: add sp, sp, #12 ldr pc, [sp], #4 .L_DYNAMIC: .word _DYNAMIC - .
