arch/riscv/kernel/efi-header.S

Source file repositories/reference/linux-study-clean/arch/riscv/kernel/efi-header.S

File Facts

System
Linux kernel
Corpus path
arch/riscv/kernel/efi-header.S
Extension
.S
Size
3929 bytes
Lines
125
Domain
Architecture Layer
Bucket
arch/riscv
Inferred role
Architecture Layer: arch/riscv
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/pe.h>
#include <linux/sizes.h>
#include <asm/set_memory.h>

	.macro	__EFI_PE_HEADER
	.long	IMAGE_NT_SIGNATURE
coff_header:
#ifdef CONFIG_64BIT
	.short	IMAGE_FILE_MACHINE_RISCV64		// Machine
#else
	.short	IMAGE_FILE_MACHINE_RISCV32		// Machine
#endif
	.short	section_count				// NumberOfSections
	.long	0 					// TimeDateStamp
	.long	0					// PointerToSymbolTable
	.long	0					// NumberOfSymbols
	.short	section_table - optional_header		// SizeOfOptionalHeader
	.short	IMAGE_FILE_DEBUG_STRIPPED | \
		IMAGE_FILE_EXECUTABLE_IMAGE | \
		IMAGE_FILE_LINE_NUMS_STRIPPED		// Characteristics

optional_header:
#ifdef CONFIG_64BIT
	.short	IMAGE_NT_OPTIONAL_HDR64_MAGIC		// PE32+ format
#else
	.short	IMAGE_NT_OPTIONAL_HDR32_MAGIC		// PE32 format
#endif
	.byte	0x02					// MajorLinkerVersion
	.byte	0x14					// MinorLinkerVersion
	.long	__pecoff_text_end - efi_header_end	// SizeOfCode
#ifdef __clang__
	.long   __pecoff_data_virt_size			// SizeOfInitializedData
#else
	.long	__pecoff_data_virt_end - __pecoff_text_end	// SizeOfInitializedData
#endif
	.long	0					// SizeOfUninitializedData
	.long	__efistub_efi_pe_entry - _start		// AddressOfEntryPoint
	.long	efi_header_end - _start			// BaseOfCode
#ifdef CONFIG_32BIT
	.long  __pecoff_text_end - _start		// BaseOfData
#endif

extra_header_fields:
	.quad	0					// ImageBase
	.long	PECOFF_SECTION_ALIGNMENT		// SectionAlignment
	.long	PECOFF_FILE_ALIGNMENT			// FileAlignment
	.short	0					// MajorOperatingSystemVersion
	.short	0					// MinorOperatingSystemVersion
	.short	LINUX_EFISTUB_MAJOR_VERSION		// MajorImageVersion
	.short	LINUX_EFISTUB_MINOR_VERSION		// MinorImageVersion
	.short	0					// MajorSubsystemVersion
	.short	0					// MinorSubsystemVersion
	.long	0					// Win32VersionValue

	.long	_end - _start				// SizeOfImage

	// Everything before the kernel image is considered part of the header
	.long	efi_header_end - _start			// SizeOfHeaders
	.long	0					// CheckSum
	.short	IMAGE_SUBSYSTEM_EFI_APPLICATION		// Subsystem
	.short	IMAGE_DLLCHARACTERISTICS_NX_COMPAT	// 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

Annotation

Implementation Notes