summaryrefslogtreecommitdiffstats
path: root/arch/arm/boot/compressed/efi-header.S
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/boot/compressed/efi-header.S
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/boot/compressed/efi-header.S')
-rw-r--r--arch/arm/boot/compressed/efi-header.S136
1 files changed, 136 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/efi-header.S b/arch/arm/boot/compressed/efi-header.S
new file mode 100644
index 000000000..230030c13
--- /dev/null
+++ b/arch/arm/boot/compressed/efi-header.S
@@ -0,0 +1,136 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2013-2017 Linaro Ltd
+ * Authors: Roy Franz <roy.franz@linaro.org>
+ * Ard Biesheuvel <ard.biesheuvel@linaro.org>
+ */
+
+#include <linux/pe.h>
+#include <linux/sizes.h>
+
+ .macro __nop
+ AR_CLASS( mov r0, r0 )
+ M_CLASS( nop.w )
+ .endm
+
+ .macro __initial_nops
+#ifdef CONFIG_EFI_STUB
+ @ This is a two-instruction NOP, which happens to bear the
+ @ PE/COFF signature "MZ" in the first two bytes, so the kernel
+ @ is accepted as an EFI binary. Booting via the UEFI stub
+ @ will not execute those instructions, but the ARM/Linux
+ @ boot protocol does, so we need some NOPs here.
+ .inst MZ_MAGIC | (0xe225 << 16) @ eor r5, r5, 0x4d000
+ eor r5, r5, 0x4d000 @ undo previous insn
+#else
+ __nop
+ __nop
+#endif
+ .endm
+
+ .macro __EFI_HEADER
+#ifdef CONFIG_EFI_STUB
+ .set start_offset, __efi_start - start
+ .org start + 0x3c
+ @
+ @ The PE header can be anywhere in the file, but for
+ @ simplicity we keep it together with the MSDOS header
+ @ The offset to the PE/COFF header needs to be at offset
+ @ 0x3C in the MSDOS header.
+ @ The only 2 fields of the MSDOS header that are used are this
+ @ PE/COFF offset, and the "MZ" bytes at offset 0x0.
+ @
+ .long pe_header - start @ Offset to the PE header.
+
+pe_header:
+ .long PE_MAGIC
+
+coff_header:
+ .short IMAGE_FILE_MACHINE_THUMB @ Machine
+ .short section_count @ NumberOfSections
+ .long 0 @ TimeDateStamp
+ .long 0 @ PointerToSymbolTable
+ .long 0 @ NumberOfSymbols
+ .short section_table - optional_header @ SizeOfOptionalHeader
+ .short IMAGE_FILE_32BIT_MACHINE | \
+ IMAGE_FILE_DEBUG_STRIPPED | \
+ IMAGE_FILE_EXECUTABLE_IMAGE | \
+ IMAGE_FILE_LINE_NUMS_STRIPPED @ Characteristics
+
+#define __pecoff_code_size (__pecoff_data_start - __efi_start)
+
+optional_header:
+ .short PE_OPT_MAGIC_PE32 @ PE32 format
+ .byte 0x02 @ MajorLinkerVersion
+ .byte 0x14 @ MinorLinkerVersion
+ .long __pecoff_code_size @ SizeOfCode
+ .long __pecoff_data_size @ SizeOfInitializedData
+ .long 0 @ SizeOfUninitializedData
+ .long efi_pe_entry - start @ AddressOfEntryPoint
+ .long start_offset @ BaseOfCode
+ .long __pecoff_data_start - start @ BaseOfData
+
+extra_header_fields:
+ .long 0 @ ImageBase
+ .long SZ_4K @ SectionAlignment
+ .long SZ_512 @ FileAlignment
+ .short 0 @ MajorOsVersion
+ .short 0 @ MinorOsVersion
+ .short LINUX_EFISTUB_MAJOR_VERSION @ MajorImageVersion
+ .short LINUX_EFISTUB_MINOR_VERSION @ MinorImageVersion
+ .short 0 @ MajorSubsystemVersion
+ .short 0 @ MinorSubsystemVersion
+ .long 0 @ Win32VersionValue
+
+ .long __pecoff_end - start @ SizeOfImage
+ .long start_offset @ SizeOfHeaders
+ .long 0 @ CheckSum
+ .short IMAGE_SUBSYSTEM_EFI_APPLICATION @ Subsystem
+ .short 0 @ DllCharacteristics
+ .long 0 @ SizeOfStackReserve
+ .long 0 @ SizeOfStackCommit
+ .long 0 @ SizeOfHeapReserve
+ .long 0 @ SizeOfHeapCommit
+ .long 0 @ LoaderFlags
+ .long (section_table - .) / 8 @ NumberOfRvaAndSizes
+
+ .quad 0 @ ExportTable
+ .quad 0 @ ImportTable
+ .quad 0 @ ResourceTable
+ .quad 0 @ ExceptionTable
+ .quad 0 @ CertificationTable
+ .quad 0 @ BaseRelocationTable
+
+section_table:
+ .ascii ".text\0\0\0"
+ .long __pecoff_code_size @ VirtualSize
+ .long __efi_start @ VirtualAddress
+ .long __pecoff_code_size @ SizeOfRawData
+ .long __efi_start @ PointerToRawData
+ .long 0 @ PointerToRelocations
+ .long 0 @ PointerToLineNumbers
+ .short 0 @ NumberOfRelocations
+ .short 0 @ NumberOfLineNumbers
+ .long IMAGE_SCN_CNT_CODE | \
+ IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_MEM_EXECUTE @ Characteristics
+
+ .ascii ".data\0\0\0"
+ .long __pecoff_data_size @ VirtualSize
+ .long __pecoff_data_start - start @ VirtualAddress
+ .long __pecoff_data_rawsize @ SizeOfRawData
+ .long __pecoff_data_start - start @ PointerToRawData
+ .long 0 @ PointerToRelocations
+ .long 0 @ PointerToLineNumbers
+ .short 0 @ NumberOfRelocations
+ .short 0 @ NumberOfLineNumbers
+ .long IMAGE_SCN_CNT_INITIALIZED_DATA | \
+ IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_MEM_WRITE @ Characteristics
+
+ .set section_count, (. - section_table) / 40
+
+ .align 12
+__efi_start:
+#endif
+ .endm