/* SPDX-License-Identifier: GPL-2.0+ */
|
/*
|
* crt0-efi-riscv.S - PE/COFF header for RISC-V EFI applications
|
*
|
* Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
|
* Copright (C) 2018 Alexander Graf <agraf@suse.de>
|
*
|
* This file is inspired by arch/arm/lib/crt0_aarch64_efi.S
|
*/
|
|
#include <asm-generic/pe.h>
|
|
#if __riscv_xlen == 64
|
#define SIZE_LONG 8
|
#define SAVE_LONG(reg, idx) sd reg, (idx*SIZE_LONG)(sp)
|
#define LOAD_LONG(reg, idx) ld reg, (idx*SIZE_LONG)(sp)
|
#define PE_MACHINE 0x5064
|
#else
|
#define SIZE_LONG 4
|
#define SAVE_LONG(reg, idx) sw reg, (idx*SIZE_LONG)(sp)
|
#define LOAD_LONG(reg, idx) lw reg, (idx*SIZE_LONG)(sp)
|
#define PE_MACHINE 0x5032
|
#endif
|
|
|
.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 PE_MACHINE /* RISC-V 64/32-bit */
|
.short 2 /* nr_sections */
|
.long 0 /* TimeDateStamp */
|
.long 0 /* PointerToSymbolTable */
|
.long 1 /* NumberOfSymbols */
|
.short section_table - optional_header /* SizeOfOptionalHeader */
|
/*
|
* Characteristics: IMAGE_FILE_DEBUG_STRIPPED |
|
* IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_LINE_NUMS_STRIPPED
|
*/
|
.short 0x206
|
optional_header:
|
.short 0x20b /* 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 */
|
|
extra_header_fields:
|
.quad 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 IMAGE_SUBSYSTEM_EFI_APPLICATION /* 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:
|
|
/*
|
* 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) */
|
|
_start:
|
addi sp, sp, -(SIZE_LONG * 3)
|
SAVE_LONG(a0, 0)
|
SAVE_LONG(a1, 1)
|
SAVE_LONG(ra, 2)
|
|
lla a0, ImageBase
|
lla a1, _DYNAMIC
|
call _relocate
|
bne a0, zero, 0f
|
|
LOAD_LONG(a1, 1)
|
LOAD_LONG(a0, 0)
|
call efi_main
|
|
LOAD_LONG(ra, 2)
|
|
0: addi sp, sp, (SIZE_LONG * 3)
|
ret
|
