/* $OpenBSD: start.S,v 1.5 2022/07/30 21:06:54 patrick Exp $ */ /*- * Copyright (c) 2014 Andrew Turner * All rights reserved. * * 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: head/sys/boot/efi/loader/arch/arm64/start.S 282727 2015-05-10 13:24:26Z ian $ */ /* * We need to be a PE32+ file for EFI. On some architectures we can use * objcopy to create the correct file, however on arm64 we need to do * it ourselves. */ #define IMAGE_FILE_MACHINE_ARM64 0xaa64 #define IMAGE_SCN_CNT_CODE 0x00000020 #define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 #define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 #define IMAGE_SCN_MEM_EXECUTE 0x20000000 #define IMAGE_SCN_MEM_READ 0x40000000 #define IMAGE_SCN_MEM_WRITE 0x80000000 .globl __data_start .section .peheader, "a" efi_start: /* The MS-DOS Stub, only used to get the offset of the COFF header */ .ascii "MZ" .short 0 .space 0x38 .long pe_sig - efi_start /* The PE32 Signature. Needs to be 8-byte aligned */ .align 3 pe_sig: .ascii "PE" .short 0 coff_head: .short IMAGE_FILE_MACHINE_ARM64 /* AArch64 file */ .short 2 /* 2 Sections */ .long 0 /* Timestamp */ .long 0 /* No symbol table */ .long 0 /* No symbols */ .short section_table - optional_header /* Optional header size */ .short 0x0206 /* Characteristics */ optional_header: .short 0x020b /* PE32+ (64-bit addressing) */ .byte 0 /* Major linker version */ .byte 0 /* Minor linker version */ .long _etext - _end_header /* Code size */ .long __data_size /* Initialized data size */ .long 0 /* No uninitialized data */ .long _start - efi_start /* Entry point */ .long _end_header - efi_start /* Start of code */ optional_windows_header: .quad 0 /* Image base */ .long 4096 /* Section Alignment */ .long 512 /* File alignment */ .short 0 /* Major OS version */ .short 0 /* Minor OS version */ .short 0 /* Major image version */ .short 0 /* Minor image version */ .short 0 /* Major subsystem version */ .short 0 /* Minor subsystem version */ .long 0 /* Win32 version */ .long _edata - efi_start /* Image size */ .long _end_header - efi_start /* Header size */ .long 0 /* Checksum */ .short 0xa /* Subsystem (EFI app) */ .short 0 /* DLL Characteristics */ .quad 0 /* Stack reserve */ .quad 0 /* Stack commit */ .quad 0 /* Heap reserve */ .quad 0 /* Heap commit */ .long 0 /* Loader flags */ .long 6 /* Number of RVAs */ /* RVAs: */ .quad 0 .quad 0 .quad 0 .quad 0 .quad 0 .quad 0 section_table: /* The contents of the loader */ .ascii ".text" .byte 0 .byte 0 .byte 0 /* Pad to 8 bytes */ .long _etext - _end_header /* Virtual size */ .long _end_header - efi_start /* Virtual address */ .long _etext - _end_header /* Size of raw data */ .long _end_header - efi_start /* Pointer to raw data */ .long 0 /* Pointer to relocations */ .long 0 /* Pointer to line numbers */ .short 0 /* Number of relocations */ .short 0 /* Number of line numbers */ .long (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | \ IMAGE_SCN_MEM_READ) /* Characteristics */ /* The contents of the loader */ .ascii ".data" .byte 0 .byte 0 .byte 0 /* Pad to 8 bytes */ .long __data_size /* Virtual size */ .long __data_start - efi_start /* Virtual address */ .long __data_size /* Size of raw data */ .long __data_start - efi_start /* Pointer to raw data */ .long 0 /* Pointer to relocations */ .long 0 /* Pointer to line numbers */ .short 0 /* Number of relocations */ .short 0 /* Number of line numbers */ .long (IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ | \ IMAGE_SCN_MEM_WRITE) /* Characteristics */ .align 12 _end_header: .text .globl _start _start: /* Save the boot params to the stack */ stp x0, x1, [sp, #-16]! adr x0, __bss_start adr x1, __bss_end b 2f 1: stp xzr, xzr, [x0], #16 2: cmp x0, x1 b.lo 1b adr x0, ImageBase adr x1, _DYNAMIC bl self_reloc ldp x0, x1, [sp], #16 bl efi_main 1: b 1b .data .align 4 #include "dt_blob.S"
