Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Linus Torvalds (pre-git) | 1286 | 97.79% | 14 | 66.67% |
Helge Deller | 15 | 1.14% | 1 | 4.76% |
Al Viro | 9 | 0.68% | 1 | 4.76% |
Greg Kroah-Hartman | 1 | 0.08% | 1 | 4.76% |
Roel Kluin | 1 | 0.08% | 1 | 4.76% |
Linus Torvalds | 1 | 0.08% | 1 | 4.76% |
Michael Hayes | 1 | 0.08% | 1 | 4.76% |
Josh Triplett | 1 | 0.08% | 1 | 4.76% |
Total | 1315 | 21 |
// SPDX-License-Identifier: GPL-2.0 /* * arch/alpha/boot/tools/objstrip.c * * Strip the object file headers/trailers from an executable (ELF or ECOFF). * * Copyright (C) 1996 David Mosberger-Tang. */ /* * Converts an ECOFF or ELF object file into a bootable file. The * object file must be a OMAGIC file (i.e., data and bss follow immediately * behind the text). See DEC "Assembly Language Programmer's Guide" * documentation for details. The SRM boot process is documented in * the Alpha AXP Architecture Reference Manual, Second Edition by * Richard L. Sites and Richard T. Witek. */ #include <stdio.h> #include <string.h> #include <stdlib.h> #include <unistd.h> #include <sys/fcntl.h> #include <sys/stat.h> #include <sys/types.h> #include <linux/a.out.h> #include <linux/coff.h> #include <linux/param.h> #ifdef __ELF__ # include <linux/elf.h> # define elfhdr elf64_hdr # define elf_phdr elf64_phdr # define elf_check_arch(x) ((x)->e_machine == EM_ALPHA) #endif /* bootfile size must be multiple of BLOCK_SIZE: */ #define BLOCK_SIZE 512 const char * prog_name; static void usage (void) { fprintf(stderr, "usage: %s [-v] -p file primary\n" " %s [-vb] file [secondary]\n", prog_name, prog_name); exit(1); } int main (int argc, char *argv[]) { size_t nwritten, tocopy, n, mem_size, fil_size, pad = 0; int fd, ofd, i, j, verbose = 0, primary = 0; char buf[8192], *inname; struct exec * aout; /* includes file & aout header */ long offset; #ifdef __ELF__ struct elfhdr *elf; struct elf_phdr *elf_phdr; /* program header */ unsigned long long e_entry; #endif prog_name = argv[0]; for (i = 1; i < argc && argv[i][0] == '-'; ++i) { for (j = 1; argv[i][j]; ++j) { switch (argv[i][j]) { case 'v': verbose = ~verbose; break; case 'b': pad = BLOCK_SIZE; break; case 'p': primary = 1; /* make primary bootblock */ break; } } } if (i >= argc) { usage(); } inname = argv[i++]; fd = open(inname, O_RDONLY); if (fd == -1) { perror("open"); exit(1); } ofd = 1; if (i < argc) { ofd = open(argv[i++], O_WRONLY | O_CREAT | O_TRUNC, 0666); if (ofd == -1) { perror("open"); exit(1); } } if (primary) { /* generate bootblock for primary loader */ unsigned long bb[64], sum = 0; struct stat st; off_t size; int i; if (ofd == 1) { usage(); } if (fstat(fd, &st) == -1) { perror("fstat"); exit(1); } size = (st.st_size + BLOCK_SIZE - 1) & ~(BLOCK_SIZE - 1); memset(bb, 0, sizeof(bb)); strcpy((char *) bb, "Linux SRM bootblock"); bb[60] = size / BLOCK_SIZE; /* count */ bb[61] = 1; /* starting sector # */ bb[62] = 0; /* flags---must be 0 */ for (i = 0; i < 63; ++i) { sum += bb[i]; } bb[63] = sum; if (write(ofd, bb, sizeof(bb)) != sizeof(bb)) { perror("boot-block write"); exit(1); } printf("%lu\n", size); return 0; } /* read and inspect exec header: */ if (read(fd, buf, sizeof(buf)) < 0) { perror("read"); exit(1); } #ifdef __ELF__ elf = (struct elfhdr *) buf; if (memcmp(&elf->e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0) { if (elf->e_type != ET_EXEC) { fprintf(stderr, "%s: %s is not an ELF executable\n", prog_name, inname); exit(1); } if (!elf_check_arch(elf)) { fprintf(stderr, "%s: is not for this processor (e_machine=%d)\n", prog_name, elf->e_machine); exit(1); } if (elf->e_phnum != 1) { fprintf(stderr, "%s: %d program headers (forgot to link with -N?)\n", prog_name, elf->e_phnum); } e_entry = elf->e_entry; lseek(fd, elf->e_phoff, SEEK_SET); if (read(fd, buf, sizeof(*elf_phdr)) != sizeof(*elf_phdr)) { perror("read"); exit(1); } elf_phdr = (struct elf_phdr *) buf; offset = elf_phdr->p_offset; mem_size = elf_phdr->p_memsz; fil_size = elf_phdr->p_filesz; /* work around ELF bug: */ if (elf_phdr->p_vaddr < e_entry) { unsigned long delta = e_entry - elf_phdr->p_vaddr; offset += delta; mem_size -= delta; fil_size -= delta; elf_phdr->p_vaddr += delta; } if (verbose) { fprintf(stderr, "%s: extracting %#016lx-%#016lx (at %lx)\n", prog_name, (long) elf_phdr->p_vaddr, elf_phdr->p_vaddr + fil_size, offset); } } else #endif { aout = (struct exec *) buf; if (!(aout->fh.f_flags & COFF_F_EXEC)) { fprintf(stderr, "%s: %s is not in executable format\n", prog_name, inname); exit(1); } if (aout->fh.f_opthdr != sizeof(aout->ah)) { fprintf(stderr, "%s: %s has unexpected optional header size\n", prog_name, inname); exit(1); } if (N_MAGIC(*aout) != OMAGIC) { fprintf(stderr, "%s: %s is not an OMAGIC file\n", prog_name, inname); exit(1); } offset = N_TXTOFF(*aout); fil_size = aout->ah.tsize + aout->ah.dsize; mem_size = fil_size + aout->ah.bsize; if (verbose) { fprintf(stderr, "%s: extracting %#016lx-%#016lx (at %lx)\n", prog_name, aout->ah.text_start, aout->ah.text_start + fil_size, offset); } } if (lseek(fd, offset, SEEK_SET) != offset) { perror("lseek"); exit(1); } if (verbose) { fprintf(stderr, "%s: copying %lu byte from %s\n", prog_name, (unsigned long) fil_size, inname); } tocopy = fil_size; while (tocopy > 0) { n = tocopy; if (n > sizeof(buf)) { n = sizeof(buf); } tocopy -= n; if ((size_t) read(fd, buf, n) != n) { perror("read"); exit(1); } do { nwritten = write(ofd, buf, n); if ((ssize_t) nwritten == -1) { perror("write"); exit(1); } n -= nwritten; } while (n > 0); } if (pad) { mem_size = ((mem_size + pad - 1) / pad) * pad; } tocopy = mem_size - fil_size; if (tocopy > 0) { fprintf(stderr, "%s: zero-filling bss and aligning to %lu with %lu bytes\n", prog_name, pad, (unsigned long) tocopy); memset(buf, 0x00, sizeof(buf)); do { n = tocopy; if (n > sizeof(buf)) { n = sizeof(buf); } nwritten = write(ofd, buf, n); if ((ssize_t) nwritten == -1) { perror("write"); exit(1); } tocopy -= nwritten; } while (tocopy > 0); } return 0; }
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