xref: /src/sys/arch/alpha/include/elf_machdep.h

/* $NetBSD: elf_machdep.h,v 1.16 2025/04/18 17:56:50 riastradh Exp $ */

#ifndef	_ALPHA_ELF_MACHDEP_H_
#define	_ALPHA_ELF_MACHDEP_H_

/*
 * Alpha ELF uses different (non-standard) definitions for the symbol
 * hash table section.
 */
#define	Elf_Symindx	uint64_t

#define	ELF32_MACHDEP_ENDIANNESS	XXX	/* break compilation */
#define	ELF32_MACHDEP_ID_CASES						\
		/* no 32-bit ELF machine types supported */

#define	ELF64_MACHDEP_ENDIANNESS	ELFDATA2LSB
#define	ELF64_MACHDEP_ID_CASES						\
		case EM_OLD_ALPHA:					\
		case EM_ALPHA:						\
			break;

#define	ELF64_MACHDEP_ID	EM_ALPHA

#define	KERN_ELFSIZE		64
#define ARCH_ELFSIZE		64	/* MD native binary size */

/*
 * Alpha Relocation Types
 */
#define	R_ALPHA_NONE		0	/* No reloc */
#define	R_ALPHA_REFLONG		1	/* Direct 32 bit */
#define	R_ALPHA_REFQUAD		2	/* Direct 64 bit */
#define	R_ALPHA_GPREL32		3	/* GP relative 32 bit */
#define	R_ALPHA_LITERAL		4	/* GP relative 16 bit w/optimization */
#define	R_ALPHA_LITUSE		5	/* Optimization hint for LITERAL */
#define	R_ALPHA_GPDISP		6	/* Add displacement to GP */
#define	R_ALPHA_BRADDR		7	/* PC+4 relative 23 bit shifted */
#define	R_ALPHA_HINT		8	/* PC+4 relative 16 bit shifted */
#define	R_ALPHA_SREL16		9	/* PC relative 16 bit */
#define	R_ALPHA_SREL32		10	/* PC relative 32 bit */
#define	R_ALPHA_SREL64		11	/* PC relative 64 bit */
#define	R_ALPHA_OP_PUSH		12	/* OP stack push */
#define	R_ALPHA_OP_STORE	13	/* OP stack pop and store */
#define	R_ALPHA_OP_PSUB		14	/* OP stack subtract */
#define	R_ALPHA_OP_PRSHIFT	15	/* OP stack right shift */
#define	R_ALPHA_GPVALUE		16
#define	R_ALPHA_GPRELHIGH	17
#define	R_ALPHA_GPRELLOW	18
#define	R_ALPHA_IMMED_GP_16	19
#define	R_ALPHA_IMMED_GP_HI32	20
#define	R_ALPHA_IMMED_SCN_HI32	21
#define	R_ALPHA_IMMED_BR_HI32	22
#define	R_ALPHA_IMMED_LO32	23
#define	R_ALPHA_COPY		24	/* Copy symbol at runtime */
#define	R_ALPHA_GLOB_DAT	25	/* Create GOT entry */
#define	R_ALPHA_JMP_SLOT	26	/* Create PLT entry */
#define	R_ALPHA_RELATIVE	27	/* Adjust by program base */
#define	R_ALPHA_BRSGP		28

/* TLS relocations */
#define	R_ALPHA_TLS_GD		29
#define	R_ALPHA_TLSLDM		30
#define	R_ALPHA_DTPMOD64	31
#define	R_ALPHA_GOTDTPREL	32
#define	R_ALPHA_DTPREL64	33
#define	R_ALPHA_DTPRELHI	34
#define	R_ALPHA_DTPRELLO	35
#define	R_ALPHA_DTPREL16	36
#define	R_ALPHA_GOTTPREL	37
#define	R_ALPHA_TPREL64		38
#define	R_ALPHA_TPRELHI		39
#define	R_ALPHA_TPRELLO		40
#define	R_ALPHA_TPREL16		41

#define	R_TYPE(name)		__CONCAT(R_ALPHA_,name)

/* Alpha dynamic tags */
#define	DT_ALPHA_PLTRO		0x70000000	/* secure (read-only) PLT */

#endif /* _ALPHA_ELF_MACHDEP_H_ */