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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-03-23 20:00:46 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2017-04-04 18:50:09 +0200
commitb5f4a214b802a722091de1d94735f130dab18d1b (patch)
tree99b9e9a0ee40dfbf40038975109b76d2aec6010f /arch/arm64/kernel/head.S
parentinclude: pe.h: add some missing definitions (diff)
downloadlinux-b5f4a214b802a722091de1d94735f130dab18d1b.tar.xz
linux-b5f4a214b802a722091de1d94735f130dab18d1b.zip
arm64: efi: move EFI header and related data to a separate .S file
In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/head.S')
-rw-r--r--arch/arm64/kernel/head.S150
1 files changed, 3 insertions, 147 deletions
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 0b13748ebfa6..c1977bed01db 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -42,6 +42,8 @@
#include <asm/thread_info.h>
#include <asm/virt.h>
+#include "efi-header.S"
+
#define __PHYS_OFFSET (KERNEL_START - TEXT_OFFSET)
#if (TEXT_OFFSET & 0xfff) != 0
@@ -102,153 +104,7 @@ _head:
#ifdef CONFIG_EFI
.align 3
pe_header:
- .ascii "PE"
- .short 0
-coff_header:
- .short 0xaa64 // AArch64
- .short 2 // 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 _end - efi_header_end // SizeOfCode
- .long 0 // SizeOfInitializedData
- .long 0 // SizeOfUninitializedData
- .long __efistub_entry - _head // AddressOfEntryPoint
- .long efi_header_end - _head // BaseOfCode
-
-extra_header_fields:
- .quad 0 // ImageBase
- .long 0x1000 // SectionAlignment
- .long PECOFF_FILE_ALIGNMENT // FileAlignment
- .short 0 // MajorOperatingSystemVersion
- .short 0 // MinorOperatingSystemVersion
- .short 0 // MajorImageVersion
- .short 0 // MinorImageVersion
- .short 0 // MajorSubsystemVersion
- .short 0 // MinorSubsystemVersion
- .long 0 // Win32VersionValue
-
- .long _end - _head // SizeOfImage
-
- // Everything before the kernel image is considered part of the header
- .long efi_header_end - _head // SizeOfHeaders
- .long 0 // CheckSum
- .short 0xa // Subsystem (EFI application)
- .short 0 // DllCharacteristics
- .quad 0 // SizeOfStackReserve
- .quad 0 // SizeOfStackCommit
- .quad 0 // SizeOfHeapReserve
- .quad 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
-
-#ifdef CONFIG_DEBUG_EFI
- .long efi_debug_table - _head // DebugTable
- .long efi_debug_table_size
-#endif
-
- // 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 _end - efi_header_end // VirtualSize
- .long efi_header_end - _head // VirtualAddress
- .long _edata - efi_header_end // SizeOfRawData
- .long efi_header_end - _head // 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)
-
-#ifdef CONFIG_DEBUG_EFI
- /*
- * The debug table is referenced via its Relative Virtual Address (RVA),
- * which is only defined for those parts of the image that are covered
- * by a section declaration. Since this header is not covered by any
- * section, the debug table must be emitted elsewhere. So stick it in
- * the .init.rodata section instead.
- *
- * Note that the EFI debug entry itself may legally have a zero RVA,
- * which means we can simply put it right after the section headers.
- */
- __INITRODATA
-
- .align 2
-efi_debug_table:
- // EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
- .long 0 // Characteristics
- .long 0 // TimeDateStamp
- .short 0 // MajorVersion
- .short 0 // MinorVersion
- .long 2 // Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW
- .long efi_debug_entry_size // SizeOfData
- .long 0 // RVA
- .long efi_debug_entry - _head // FileOffset
-
- .set efi_debug_table_size, . - efi_debug_table
- .previous
-
-efi_debug_entry:
- // EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
- .ascii "NB10" // Signature
- .long 0 // Unknown
- .long 0 // Unknown2
- .long 0 // Unknown3
-
- .asciz VMLINUX_PATH
-
- .set efi_debug_entry_size, . - efi_debug_entry
-#endif
-
- /*
- * EFI will load .text onwards at the 4k section alignment
- * described in the PE/COFF header. To ensure that instruction
- * sequences using an adrp and a :lo12: immediate will function
- * correctly at this alignment, we must ensure that .text is
- * placed at a 4k boundary in the Image to begin with.
- */
- .align 12
-efi_header_end:
+ __EFI_PE_HEADER
#endif
__INIT