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101 lines
1.9 KiB
101 lines
1.9 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2017 Andes Technology |
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* Chih-Mao Chen <[email protected]> |
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* |
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* Statically process runtime relocations on RISC-V ELF images |
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* so that it can be directly executed when loaded at LMA |
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* without fixup. Both RV32 and RV64 are supported. |
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*/ |
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#if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__ |
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#error "Only little-endian host is supported" |
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#endif |
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#include <errno.h> |
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#include <stdbool.h> |
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#include <stdint.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <elf.h> |
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#include <fcntl.h> |
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#include <sys/mman.h> |
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#include <sys/stat.h> |
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#include <sys/types.h> |
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#include <unistd.h> |
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#ifndef EM_RISCV |
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#define EM_RISCV 243 |
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#endif |
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#ifndef R_RISCV_32 |
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#define R_RISCV_32 1 |
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#endif |
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#ifndef R_RISCV_64 |
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#define R_RISCV_64 2 |
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#endif |
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#ifndef R_RISCV_RELATIVE |
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#define R_RISCV_RELATIVE 3 |
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#endif |
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const char *argv0; |
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#define die(fmt, ...) \ |
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do { \ |
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fprintf(stderr, "%s: " fmt "\n", argv0, ## __VA_ARGS__); \ |
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exit(EXIT_FAILURE); \ |
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} while (0) |
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#define PRELINK_INC_BITS 32 |
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#include "prelink-riscv.inc" |
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#undef PRELINK_INC_BITS |
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#define PRELINK_INC_BITS 64 |
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#include "prelink-riscv.inc" |
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#undef PRELINK_INC_BITS |
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int main(int argc, const char *const *argv) |
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{ |
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argv0 = argv[0]; |
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if (argc < 2) { |
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fprintf(stderr, "Usage: %s <u-boot>\n", argv0); |
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exit(EXIT_FAILURE); |
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} |
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int fd = open(argv[1], O_RDWR, 0); |
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if (fd < 0) |
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die("Cannot open %s: %s", argv[1], strerror(errno)); |
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struct stat st; |
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if (fstat(fd, &st) < 0) |
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die("Cannot stat %s: %s", argv[1], strerror(errno)); |
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void *data = |
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mmap(0, st.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
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if (data == MAP_FAILED) |
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die("Cannot mmap %s: %s", argv[1], strerror(errno)); |
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close(fd); |
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unsigned char *e_ident = (unsigned char *)data; |
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if (memcmp(e_ident, ELFMAG, SELFMAG) != 0) |
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die("Invalid ELF file %s", argv[1]); |
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bool is64 = e_ident[EI_CLASS] == ELFCLASS64; |
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if (is64) |
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prelink64(data); |
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else |
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prelink32(data); |
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return 0; |
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}
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