diff options
Diffstat (limited to 'gnu-efi/gnuefi/crt0-efi-aarch64.S')
| -rw-r--r-- | gnu-efi/gnuefi/crt0-efi-aarch64.S | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/gnu-efi/gnuefi/crt0-efi-aarch64.S b/gnu-efi/gnuefi/crt0-efi-aarch64.S new file mode 100644 index 00000000..b41b8e76 --- /dev/null +++ b/gnu-efi/gnuefi/crt0-efi-aarch64.S @@ -0,0 +1,142 @@ +/* + * crt0-efi-aarch64.S - PE/COFF header for AArch64 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 0xaa64 // AArch64 + .short 3 // nr_sections + .long 0 // TimeDateStamp + .long 0 // PointerToSymbolTable + .long 1 // NumberOfSymbols + .short section_table - optional_header // SizeOfOptionalHeader + .short 0x206 // Characteristics. + // IMAGE_FILE_DEBUG_STRIPPED | + // IMAGE_FILE_EXECUTABLE_IMAGE | + // IMAGE_FILE_LINE_NUMS_STRIPPED +optional_header: + .short 0x20b // PE32+ format + .byte 0x02 // MajorLinkerVersion + .byte 0x14 // MinorLinkerVersion + .long _data - _start // SizeOfCode + .long _alldata_size // SizeOfInitializedData + .long 0 // SizeOfUninitializedData + .long _start - ImageBase // AddressOfEntryPoint + .long _start - ImageBase // BaseOfCode + +extra_header_fields: + .quad 0 // ImageBase + .long 0x1000 // SectionAlignment + .long 0x200 // FileAlignment + .short 0 // MajorOperatingSystemVersion + .short 0 // MinorOperatingSystemVersion + .short 0 // MajorImageVersion + .short 0 // MinorImageVersion + .short 0 // MajorSubsystemVersion + .short 0 // MinorSubsystemVersion + .long 0 // Win32VersionValue + + .long _esbat - ImageBase // SizeOfImage + + // Everything before the kernel image is considered part of the header + .long _start - ImageBase // SizeOfHeaders + .long 0 // CheckSum + .short EFI_SUBSYSTEM // Subsystem + .short 0 // DllCharacteristics + .quad 0 // SizeOfStackReserve + .quad 0 // SizeOfStackCommit + .quad 0 // SizeOfHeapReserve + .quad 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: + .ascii ".text\0\0\0" + .long _data - _start // VirtualSize + .long _start - ImageBase // VirtualAddress + .long _data - _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 0x60000020 // Characteristics (section flags) + + .ascii ".data\0\0\0" + .long _data_size // VirtualSize + .long _data - ImageBase // VirtualAddress + .long _data_size // SizeOfRawData + .long _data - 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 0xc0000040 // Characteristics (section flags) + + .ascii ".sbat\0\0\0" + .long _sbat_vsize // VirtualSize + .long _sbat - ImageBase // VirtualAddress + .long _sbat_size // SizeOfRawData + .long _sbat - 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 0x40400040 // Characteristics (section flags) + + .align 12 +_start: + stp x29, x30, [sp, #-32]! + mov x29, sp + + stp x0, x1, [sp, #16] + mov x2, x0 + mov x3, x1 + adr x0, ImageBase + adrp x1, _DYNAMIC + add x1, x1, #:lo12:_DYNAMIC + bl _relocate + cbnz x0, 0f + + ldp x0, x1, [sp, #16] + bl efi_main + +0: ldp x29, x30, [sp], #32 + ret |