arch/x86/um/asm/elf.h

Source file repositories/reference/linux-study-clean/arch/x86/um/asm/elf.h

File Facts

System
Linux kernel
Corpus path
arch/x86/um/asm/elf.h
Extension
.h
Size
5447 bytes
Lines
187
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

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

#ifndef __UM_ELF_X86_H
#define __UM_ELF_X86_H

#include <asm/user.h>
#include <skas.h>

#define CORE_DUMP_USE_REGSET

#ifdef CONFIG_X86_32

#define R_386_NONE	0
#define R_386_32	1
#define R_386_PC32	2
#define R_386_GOT32	3
#define R_386_PLT32	4
#define R_386_COPY	5
#define R_386_GLOB_DAT	6
#define R_386_JMP_SLOT	7
#define R_386_RELATIVE	8
#define R_386_GOTOFF	9
#define R_386_GOTPC	10
#define R_386_NUM	11

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch(x) \
	(((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))

#define ELF_CLASS	ELFCLASS32
#define ELF_DATA        ELFDATA2LSB
#define ELF_ARCH        EM_386

#define ELF_PLAT_INIT(regs, load_addr) do { \
	PT_REGS_BX(regs) = 0; \
	PT_REGS_CX(regs) = 0; \
	PT_REGS_DX(regs) = 0; \
	PT_REGS_SI(regs) = 0; \
	PT_REGS_DI(regs) = 0; \
	PT_REGS_BP(regs) = 0; \
	PT_REGS_AX(regs) = 0; \
} while (0)

/* Shamelessly stolen from include/asm-i386/elf.h */

#define ELF_CORE_COPY_REGS(pr_reg, regs) do {	\
	pr_reg[0] = PT_REGS_BX(regs);		\
	pr_reg[1] = PT_REGS_CX(regs);		\
	pr_reg[2] = PT_REGS_DX(regs);		\
	pr_reg[3] = PT_REGS_SI(regs);		\
	pr_reg[4] = PT_REGS_DI(regs);		\
	pr_reg[5] = PT_REGS_BP(regs);		\
	pr_reg[6] = PT_REGS_AX(regs);		\
	pr_reg[7] = PT_REGS_DS(regs);		\
	pr_reg[8] = PT_REGS_ES(regs);		\
	/* fake once used fs and gs selectors? */	\
	pr_reg[9] = PT_REGS_DS(regs);		\
	pr_reg[10] = PT_REGS_DS(regs);		\
	pr_reg[11] = PT_REGS_SYSCALL_NR(regs);	\
	pr_reg[12] = PT_REGS_IP(regs);		\
	pr_reg[13] = PT_REGS_CS(regs);		\
	pr_reg[14] = PT_REGS_EFLAGS(regs);	\
	pr_reg[15] = PT_REGS_SP(regs);		\
	pr_reg[16] = PT_REGS_SS(regs);		\
} while (0);

#define ELF_PLATFORM_FALLBACK "i586"

#else

/* x86-64 relocation types, taken from asm-x86_64/elf.h */
#define R_X86_64_NONE		0	/* No reloc */
#define R_X86_64_64		1	/* Direct 64 bit  */
#define R_X86_64_PC32		2	/* PC relative 32 bit signed */
#define R_X86_64_GOT32		3	/* 32 bit GOT entry */
#define R_X86_64_PLT32		4	/* 32 bit PLT address */
#define R_X86_64_COPY		5	/* Copy symbol at runtime */
#define R_X86_64_GLOB_DAT	6	/* Create GOT entry */
#define R_X86_64_JUMP_SLOT	7	/* Create PLT entry */
#define R_X86_64_RELATIVE	8	/* Adjust by program base */
#define R_X86_64_GOTPCREL	9	/* 32 bit signed pc relative
					   offset to GOT */
#define R_X86_64_32		10	/* Direct 32 bit zero extended */
#define R_X86_64_32S		11	/* Direct 32 bit sign extended */
#define R_X86_64_16		12	/* Direct 16 bit zero extended */
#define R_X86_64_PC16		13	/* 16 bit sign extended pc relative */
#define R_X86_64_8		14	/* Direct 8 bit sign extended  */
#define R_X86_64_PC8		15	/* 8 bit sign extended pc relative */
#define R_X86_64_PC64		24	/* Place relative 64-bit signed */

Annotation

Implementation Notes