sw64: add ELF support

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _ASM_SW64_ELF_H

#define _ASM_SW64_ELF_H

#ifdef __KERNEL__

#include <asm/auxvec.h>

#endif

/* Special values for the st_other field in the symbol table.  */

#define STO_SW64_NOPV		0x80

#define STO_SW64_STD_GPLOAD	0x88

/*

 * SW-64 ELF relocation types

 */

#define R_SW64_NONE		0	/* No reloc */

#define R_SW64_REFLONG		1	/* Direct 32 bit */

#define R_SW64_REFQUAD		2	/* Direct 64 bit */

#define R_SW64_GPREL32		3	/* GP relative 32 bit */

#define R_SW64_LITERAL		4	/* GP relative 16 bit w/optimization */

#define R_SW64_LITUSE		5	/* Optimization hint for LITERAL */

#define R_SW64_GPDISP		6	/* Add displacement to GP */

#define R_SW64_BRADDR		7	/* PC+4 relative 23 bit shifted */

#define R_SW64_HINT		8	/* PC+4 relative 16 bit shifted */

#define R_SW64_SREL16		9	/* PC relative 16 bit */

#define R_SW64_SREL32		10	/* PC relative 32 bit */

#define R_SW64_SREL64		11	/* PC relative 64 bit */

#define R_SW64_GPRELHIGH	17	/* GP relative 32 bit, high 16 bits */

#define R_SW64_GPRELLOW		18	/* GP relative 32 bit, low 16 bits */

#define R_SW64_GPREL16		19	/* GP relative 16 bit */

#define R_SW64_COPY		24	/* Copy symbol at runtime */

#define R_SW64_GLOB_DAT		25	/* Create GOT entry */

#define R_SW64_JMP_SLOT		26	/* Create PLT entry */

#define R_SW64_RELATIVE		27	/* Adjust by program base */

#define R_SW64_BRSGP		28

#define R_SW64_TLSGD		29

#define R_SW64_TLS_LDM		30

#define R_SW64_DTPMOD64		31

#define R_SW64_GOTDTPREL	32

#define R_SW64_DTPREL64		33

#define R_SW64_DTPRELHI		34

#define R_SW64_DTPRELLO		35

#define R_SW64_DTPREL16		36

#define R_SW64_GOTTPREL		37

#define R_SW64_TPREL64		38

#define R_SW64_TPRELHI		39

#define R_SW64_TPRELLO		40

#define R_SW64_TPREL16		41

#define R_SW64_LITERAL_GOT	43	/* GP relative */

#define SHF_SW64_GPREL		0x10000000

/* Legal values for e_flags field of Elf64_Ehdr.  */

#define EF_SW64_32BIT		1	/* All addresses are below 2GB */

/*

 * ELF register definitions.

 *

 * For now, we just leave it at 33 (32 general regs + processor status word).

 */

#define ELF_NGREG	33

typedef unsigned long elf_greg_t;

typedef elf_greg_t elf_gregset_t[ELF_NGREG];

/* Same with user_fpsimd_state */

#include <uapi/asm/ptrace.h>

typedef struct user_fpsimd_state elf_fpregset_t;

/*

 * This is used to ensure we don't load something for the wrong architecture.

 */

#define elf_check_arch(x) ((x)->e_machine == EM_SW64)

/*

 * These are used to set parameters in the core dumps.

 */

#define ELF_CLASS		ELFCLASS64

#define ELF_DATA		ELFDATA2LSB

#define ELF_ARCH		EM_SW64

#define CORE_DUMP_USE_REGSET

#define ELF_EXEC_PAGESIZE	PAGE_SIZE

/*

 * This is the location that an ET_DYN program is loaded if exec'ed.  Typical

 * use of this is to invoke "./ld.so someprog" to test out a new version of

 * the loader.  We need to make sure that it is out of the way of the program

 * that it will "exec", and that there is sufficient room for the brk.

 */

#define ELF_ET_DYN_BASE		(TASK_UNMAPPED_BASE + 0x1000000)

/*

 * $0 is set by ld.so to a pointer to a function which might be

 * registered using atexit.  This provides a mean for the dynamic

 * linker to call DT_FINI functions for shared libraries that have

 * been loaded before the code runs.

 * So that we can use the same startup file with static executables,

 * we start programs with a value of 0 to indicate that there is no

 * such function.

 */

#define ELF_PLAT_INIT(_r, load_addr)	(_r->regs[0] = 0)

/*

 * The registers are laid out in pt_regs for HMCODE and syscall

 * convenience.  Re-order them for the linear elf_gregset_t.

 */

#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1

struct linux_binprm;

extern int arch_setup_additional_pages(struct linux_binprm *bprm,

				       int uses_interp);

#ifdef __KERNEL__

struct pt_regs;

struct task_struct;

extern void sw64_elf_core_copy_regs(elf_greg_t *dest, struct pt_regs *pt);

#define ELF_CORE_COPY_REGS(DEST, REGS) sw64_elf_core_copy_regs(DEST, REGS);

/*

 * This yields a mask that user programs can use to figure out what

 * instruction set this CPU supports.

 */

#define ELF_HWCAP	0

/*

 * This yields a string that ld.so will use to load implementation

 * specific libraries for optimization.  This is more specific in

 * intent than poking at uname or /proc/cpuinfo.

 */

#define ELF_PLATFORM	("sw_64")

/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */

#define ARCH_DLINFO						\

do {								\

	NEW_AUX_ENT(AT_SYSINFO_EHDR,				\

	(elf_addr_t)current->mm->context.vdso);			\

} while (0)

struct mm_struct;

extern unsigned long arch_randomize_brk(struct mm_struct *mm);

#define arch_randomize_brk arch_randomize_brk

#endif

#endif /* _ASM_SW64_ELF_H */

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _UAPI_ASM_SW64_AUXVEC_H

#define _UAPI_ASM_SW64_AUXVEC_H

/* VDSO location.  */

#define AT_SYSINFO_EHDR		33

/* entries in ARCH_DLINFO */

#define AT_VECTOR_SIZE_ARCH	1

#endif /* _UAPI_ASM_SW64_AUXVEC_H */