diff options
Diffstat (limited to 'kernel/arch/alpha/boot/tools')
| -rw-r--r-- | kernel/arch/alpha/boot/tools/mkbb.c | 152 | ||||
| -rw-r--r-- | kernel/arch/alpha/boot/tools/objstrip.c | 283 |
2 files changed, 435 insertions, 0 deletions
diff --git a/kernel/arch/alpha/boot/tools/mkbb.c b/kernel/arch/alpha/boot/tools/mkbb.c new file mode 100644 index 000000000..1185778e6 --- /dev/null +++ b/kernel/arch/alpha/boot/tools/mkbb.c @@ -0,0 +1,152 @@ +/* This utility makes a bootblock suitable for the SRM console/miniloader */ + +/* Usage: + * mkbb <device> <lxboot> + * + * Where <device> is the name of the device to install the bootblock on, + * and <lxboot> is the name of a bootblock to merge in. This bootblock + * contains the offset and size of the bootloader. It must be exactly + * 512 bytes long. + */ + +#include <fcntl.h> +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> + +/* Minimal definition of disklabel, so we don't have to include + * asm/disklabel.h (confuses make) + */ +#ifndef MAXPARTITIONS +#define MAXPARTITIONS 8 /* max. # of partitions */ +#endif + +#ifndef u8 +#define u8 unsigned char +#endif + +#ifndef u16 +#define u16 unsigned short +#endif + +#ifndef u32 +#define u32 unsigned int +#endif + +struct disklabel { + u32 d_magic; /* must be DISKLABELMAGIC */ + u16 d_type, d_subtype; + u8 d_typename[16]; + u8 d_packname[16]; + u32 d_secsize; + u32 d_nsectors; + u32 d_ntracks; + u32 d_ncylinders; + u32 d_secpercyl; + u32 d_secprtunit; + u16 d_sparespertrack; + u16 d_sparespercyl; + u32 d_acylinders; + u16 d_rpm, d_interleave, d_trackskew, d_cylskew; + u32 d_headswitch, d_trkseek, d_flags; + u32 d_drivedata[5]; + u32 d_spare[5]; + u32 d_magic2; /* must be DISKLABELMAGIC */ + u16 d_checksum; + u16 d_npartitions; + u32 d_bbsize, d_sbsize; + struct d_partition { + u32 p_size; + u32 p_offset; + u32 p_fsize; + u8 p_fstype; + u8 p_frag; + u16 p_cpg; + } d_partitions[MAXPARTITIONS]; +}; + + +typedef union __bootblock { + struct { + char __pad1[64]; + struct disklabel __label; + } __u1; + struct { + unsigned long __pad2[63]; + unsigned long __checksum; + } __u2; + char bootblock_bytes[512]; + unsigned long bootblock_quadwords[64]; +} bootblock; + +#define bootblock_label __u1.__label +#define bootblock_checksum __u2.__checksum + +int main(int argc, char ** argv) +{ + bootblock bootblock_from_disk; + bootblock bootloader_image; + int dev, fd; + int i; + int nread; + + /* Make sure of the arg count */ + if(argc != 3) { + fprintf(stderr, "Usage: %s device lxboot\n", argv[0]); + exit(0); + } + + /* First, open the device and make sure it's accessible */ + dev = open(argv[1], O_RDWR); + if(dev < 0) { + perror(argv[1]); + exit(0); + } + + /* Now open the lxboot and make sure it's reasonable */ + fd = open(argv[2], O_RDONLY); + if(fd < 0) { + perror(argv[2]); + close(dev); + exit(0); + } + + /* Read in the lxboot */ + nread = read(fd, &bootloader_image, sizeof(bootblock)); + if(nread != sizeof(bootblock)) { + perror("lxboot read"); + fprintf(stderr, "expected %zd, got %d\n", sizeof(bootblock), nread); + exit(0); + } + + /* Read in the bootblock from disk. */ + nread = read(dev, &bootblock_from_disk, sizeof(bootblock)); + if(nread != sizeof(bootblock)) { + perror("bootblock read"); + fprintf(stderr, "expected %zd, got %d\n", sizeof(bootblock), nread); + exit(0); + } + + /* Swap the bootblock's disklabel into the bootloader */ + bootloader_image.bootblock_label = bootblock_from_disk.bootblock_label; + + /* Calculate the bootblock checksum */ + bootloader_image.bootblock_checksum = 0; + for(i = 0; i < 63; i++) { + bootloader_image.bootblock_checksum += + bootloader_image.bootblock_quadwords[i]; + } + + /* Write the whole thing out! */ + lseek(dev, 0L, SEEK_SET); + if(write(dev, &bootloader_image, sizeof(bootblock)) != sizeof(bootblock)) { + perror("bootblock write"); + exit(0); + } + + close(fd); + close(dev); + exit(0); +} + + diff --git a/kernel/arch/alpha/boot/tools/objstrip.c b/kernel/arch/alpha/boot/tools/objstrip.c new file mode 100644 index 000000000..dee82695f --- /dev/null +++ b/kernel/arch/alpha/boot/tools/objstrip.c @@ -0,0 +1,283 @@ +/* + * 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 (elf->e_ident[0] == 0x7f && strncmp((char *)elf->e_ident + 1, "ELF", 3) == 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; +} |