[J-u-boot.git] / tools / prelink-riscv.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2017 Andes Technology
 * Chih-Mao Chen <[email protected]>
 *
 * Statically process runtime relocations on RISC-V ELF images
 * so that it can be directly executed when loaded at LMA
 * without fixup. Both RV32 and RV64 are supported.
 */

#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <elf.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <compiler.h>

#ifndef EM_RISCV
#define EM_RISCV 243
#endif

#ifndef R_RISCV_32
#define R_RISCV_32 1
#endif

#ifndef R_RISCV_64
#define R_RISCV_64 2
#endif

#ifndef R_RISCV_RELATIVE
#define R_RISCV_RELATIVE 3
#endif

const char *argv0;

#define die(fmt, ...) \
	do { \
		fprintf(stderr, "%s: " fmt "\n", argv0, ## __VA_ARGS__); \
		exit(EXIT_FAILURE); \
	} while (0)

#define PRELINK_BYTEORDER le
#define PRELINK_INC_BITS 32
#include "prelink-riscv.inc"
#undef PRELINK_BYTEORDER
#undef PRELINK_INC_BITS

#define PRELINK_BYTEORDER le
#define PRELINK_INC_BITS 64
#include "prelink-riscv.inc"
#undef PRELINK_BYTEORDER
#undef PRELINK_INC_BITS

#define PRELINK_BYTEORDER be
#define PRELINK_INC_BITS 32
#include "prelink-riscv.inc"
#undef PRELINK_BYTEORDER
#undef PRELINK_INC_BITS

#define PRELINK_BYTEORDER be
#define PRELINK_INC_BITS 64
#include "prelink-riscv.inc"
#undef PRELINK_BYTEORDER
#undef PRELINK_INC_BITS

int main(int argc, const char *const *argv)
{
	argv0 = argv[0];

	if (argc < 2) {
		fprintf(stderr, "Usage: %s <u-boot>\n", argv0);
		exit(EXIT_FAILURE);
	}

	int fd = open(argv[1], O_RDWR, 0);

	if (fd < 0)
		die("Cannot open %s: %s", argv[1], strerror(errno));

	struct stat st;

	if (fstat(fd, &st) < 0)
		die("Cannot stat %s: %s", argv[1], strerror(errno));

	void *data =
		mmap(0, st.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);

	if (data == MAP_FAILED)
		die("Cannot mmap %s: %s", argv[1], strerror(errno));

	close(fd);

	unsigned char *e_ident = (unsigned char *)data;

	if (memcmp(e_ident, ELFMAG, SELFMAG) != 0)
		die("Invalid ELF file %s", argv[1]);

	bool is64 = e_ident[EI_CLASS] == ELFCLASS64;
	bool isbe = e_ident[EI_DATA] == ELFDATA2MSB;

	if (is64) {
		if (isbe)
			prelink_be64(data);
		else
			prelink_le64(data);
	} else {
		if (isbe)
			prelink_be32(data);
		else
			prelink_le32(data);
	}

	return 0;
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
42ac26f2 RC	2	/*
	3	* Copyright (C) 2017 Andes Technology
	4	* Chih-Mao Chen <[email protected]>
	5	*
42ac26f2 RC	6	* Statically process runtime relocations on RISC-V ELF images
	7	* so that it can be directly executed when loaded at LMA
	8	* without fixup. Both RV32 and RV64 are supported.
	9	*/
	10
42ac26f2 RC	11	#include <errno.h>
	12	#include <stdbool.h>
	13	#include <stdint.h>
	14	#include <stdio.h>
	15	#include <stdlib.h>
	16	#include <string.h>
	17
	18	#include <elf.h>
	19	#include <fcntl.h>
	20	#include <sys/mman.h>
	21	#include <sys/stat.h>
	22	#include <sys/types.h>
	23	#include <unistd.h>
e604410d	24	#include <compiler.h>
42ac26f2 RC	25
	26	#ifndef EM_RISCV
	27	#define EM_RISCV 243
	28	#endif
	29
	30	#ifndef R_RISCV_32
	31	#define R_RISCV_32 1
	32	#endif
	33
	34	#ifndef R_RISCV_64
	35	#define R_RISCV_64 2
	36	#endif
	37
	38	#ifndef R_RISCV_RELATIVE
	39	#define R_RISCV_RELATIVE 3
	40	#endif
	41
	42	const char *argv0;
	43
	44	#define die(fmt, ...) \
	45	do { \
	46	fprintf(stderr, "%s: " fmt "\n", argv0, ## __VA_ARGS__); \
	47	exit(EXIT_FAILURE); \
	48	} while (0)
	49
4539926a	50	#define PRELINK_BYTEORDER le
42ac26f2 RC	51	#define PRELINK_INC_BITS 32
42ac26f2 RC	52	#include "prelink-riscv.inc"
4539926a	53	#undef PRELINK_BYTEORDER
42ac26f2 RC	54	#undef PRELINK_INC_BITS
42ac26f2 RC	55
4539926a	56	#define PRELINK_BYTEORDER le
42ac26f2 RC	57	#define PRELINK_INC_BITS 64
42ac26f2 RC	58	#include "prelink-riscv.inc"
4539926a MC	59	#undef PRELINK_BYTEORDER
	60	#undef PRELINK_INC_BITS
	61
	62	#define PRELINK_BYTEORDER be
	63	#define PRELINK_INC_BITS 32
	64	#include "prelink-riscv.inc"
	65	#undef PRELINK_BYTEORDER
	66	#undef PRELINK_INC_BITS
	67
	68	#define PRELINK_BYTEORDER be
	69	#define PRELINK_INC_BITS 64
	70	#include "prelink-riscv.inc"
	71	#undef PRELINK_BYTEORDER
42ac26f2 RC	72	#undef PRELINK_INC_BITS
	73
	74	int main(int argc, const char const argv)
	75	{
	76	argv0 = argv[0];
	77
	78	if (argc < 2) {
	79	fprintf(stderr, "Usage: %s <u-boot>\n", argv0);
	80	exit(EXIT_FAILURE);
	81	}
	82
	83	int fd = open(argv[1], O_RDWR, 0);
	84
	85	if (fd < 0)
	86	die("Cannot open %s: %s", argv[1], strerror(errno));
	87
	88	struct stat st;
	89
	90	if (fstat(fd, &st) < 0)
	91	die("Cannot stat %s: %s", argv[1], strerror(errno));
	92
	93	void *data =
	94	mmap(0, st.st_size, PROT_READ \| PROT_WRITE, MAP_SHARED, fd, 0);
	95
	96	if (data == MAP_FAILED)
	97	die("Cannot mmap %s: %s", argv[1], strerror(errno));
	98
	99	close(fd);
	100
	101	unsigned char e_ident = (unsigned char )data;
	102
	103	if (memcmp(e_ident, ELFMAG, SELFMAG) != 0)
	104	die("Invalid ELF file %s", argv[1]);
	105
	106	bool is64 = e_ident[EI_CLASS] == ELFCLASS64;
4539926a MC	107	bool isbe = e_ident[EI_DATA] == ELFDATA2MSB;
	108
	109	if (is64) {
	110	if (isbe)
	111	prelink_be64(data);
	112	else
	113	prelink_le64(data);
	114	} else {
	115	if (isbe)
	116	prelink_be32(data);
	117	else
	118	prelink_le32(data);
	119	}
42ac26f2 RC	120
	121	return 0;
	122	}