7551d83c35
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
240 lines
6.4 KiB
C
240 lines
6.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1999 Global Technology Associates, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#define _KERNEL
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#include <sys/param.h>
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#undef _KERNEL
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <a.out.h>
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#include "aouthdr.h"
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#include "elfhdr.h"
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#include "kgzip.h"
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static void mk_data(const struct iodesc *i, const struct iodesc *,
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struct kgz_hdr *, size_t);
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static int ld_elf(const struct iodesc *, const struct iodesc *,
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struct kgz_hdr *, const Elf32_Ehdr *);
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static int ld_aout(const struct iodesc *, const struct iodesc *,
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struct kgz_hdr *, const struct exec *);
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/*
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* Compress executable and output it in relocatable object format.
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*/
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void
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kgzcmp(struct kgz_hdr *kh, const char *f1, const char *f2)
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{
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struct iodesc idi, ido;
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struct kgz_hdr khle;
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if ((idi.fd = open(idi.fname = f1, O_RDONLY)) == -1)
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err(1, "%s", idi.fname);
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if ((ido.fd = open(ido.fname = f2, O_CREAT | O_TRUNC | O_WRONLY,
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0666)) == -1)
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err(1, "%s", ido.fname);
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kh->ident[0] = KGZ_ID0;
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kh->ident[1] = KGZ_ID1;
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kh->ident[2] = KGZ_ID2;
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kh->ident[3] = KGZ_ID3;
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mk_data(&idi, &ido, kh,
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(format == F_AOUT ? sizeof(struct kgz_aouthdr0) :
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sizeof(struct kgz_elfhdr)) +
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sizeof(struct kgz_hdr));
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kh->dload &= 0xffffff;
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kh->entry &= 0xffffff;
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if (format == F_AOUT) {
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struct kgz_aouthdr0 ahdr0 = aouthdr0;
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struct kgz_aouthdr1 ahdr1 = aouthdr1;
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unsigned x = (sizeof(struct kgz_hdr) + kh->nsize) & (16 - 1);
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if (x) {
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x = 16 - x;
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xzero(&ido, x);
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}
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xwrite(&ido, &ahdr1, sizeof(ahdr1));
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ahdr0.a.a_data += kh->nsize + x;
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xseek(&ido, 0);
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xwrite(&ido, &ahdr0, sizeof(ahdr0));
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} else {
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struct kgz_elfhdr ehdr = elfhdr;
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ehdr.st[KGZ_ST_KGZ_NDATA].st_size = htole32(kh->nsize);
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ehdr.sh[KGZ_SH_DATA].sh_size =
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htole32(le32toh(ehdr.sh[KGZ_SH_DATA].sh_size) + kh->nsize);
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xseek(&ido, 0);
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xwrite(&ido, &ehdr, sizeof(ehdr));
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}
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khle = *kh;
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khle.dload = htole32(khle.dload);
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khle.dsize = htole32(khle.dsize);
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khle.isize = htole32(khle.isize);
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khle.entry = htole32(khle.entry);
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khle.nsize = htole32(khle.nsize);
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xwrite(&ido, &khle, sizeof(khle));
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xclose(&ido);
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xclose(&idi);
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}
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/*
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* Make encoded (compressed) data.
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*/
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static void
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mk_data(const struct iodesc * idi, const struct iodesc * ido,
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struct kgz_hdr * kh, size_t off)
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{
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union {
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struct exec ex;
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Elf32_Ehdr ee;
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} hdr;
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struct stat sb;
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struct iodesc idp;
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int fd[2];
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pid_t pid;
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size_t n;
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int fmt, status, e;
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n = xread(idi, &hdr, sizeof(hdr), 0);
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fmt = 0;
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if (n >= sizeof(hdr.ee) && IS_ELF(hdr.ee))
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fmt = F_ELF;
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else if (n >= sizeof(hdr.ex) && N_GETMAGIC(hdr.ex) == ZMAGIC)
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fmt = F_AOUT;
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if (!fmt)
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errx(1, "%s: Format not supported", idi->fname);
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xseek(ido, off);
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if (pipe(fd))
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err(1, NULL);
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switch (pid = fork()) {
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case -1:
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err(1, NULL);
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case 0:
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close(fd[1]);
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dup2(fd[0], STDIN_FILENO);
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close(fd[0]);
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close(idi->fd);
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dup2(ido->fd, STDOUT_FILENO);
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close(ido->fd);
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execlp("gzip", "gzip", "-9n", (char *)NULL);
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warn(NULL);
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_exit(1);
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default:
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close(fd[0]);
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idp.fname = "(pipe)";
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idp.fd = fd[1];
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e = fmt == F_ELF ? ld_elf(idi, &idp, kh, &hdr.ee) :
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fmt == F_AOUT ? ld_aout(idi, &idp, kh, &hdr.ex) : -1;
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close(fd[1]);
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if ((pid = waitpid(pid, &status, 0)) == -1)
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err(1, NULL);
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if (WIFSIGNALED(status) || WEXITSTATUS(status))
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exit(1);
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}
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if (e)
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errx(1, "%s: Invalid format", idi->fname);
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if (fstat(ido->fd, &sb))
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err(1, "%s", ido->fname);
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kh->nsize = sb.st_size - off;
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}
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/*
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* "Load" an ELF-format executable.
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*/
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static int
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ld_elf(const struct iodesc * idi, const struct iodesc * ido,
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struct kgz_hdr * kh, const Elf32_Ehdr * e)
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{
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Elf32_Phdr p;
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size_t load, addr, n;
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unsigned x, i;
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load = addr = n = 0;
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for (x = i = 0; i < e->e_phnum; i++) {
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if (xread(idi, &p, sizeof(p),
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e->e_phoff + i * e->e_phentsize) != e->e_phentsize)
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return -1;
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if (p.p_type != PT_LOAD)
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continue;
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if (!x)
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load = addr = p.p_vaddr;
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else {
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if (p.p_vaddr < addr)
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return -1;
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n = p.p_vaddr - addr;
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if (n) {
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xzero(ido, n);
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addr += n;
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}
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}
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if (p.p_memsz < p.p_filesz)
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return -1;
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n = p.p_memsz - p.p_filesz;
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xcopy(idi, ido, p.p_filesz, p.p_offset);
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addr += p.p_filesz;
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x++;
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}
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if (!x)
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return -1;
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kh->dload = load;
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kh->dsize = addr - load;
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kh->isize = kh->dsize + n;
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kh->entry = e->e_entry;
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return 0;
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}
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/*
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* "Load" an a.out-format executable.
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*/
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static int
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ld_aout(const struct iodesc * idi, const struct iodesc * ido,
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struct kgz_hdr * kh, const struct exec * a)
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{
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size_t load, addr;
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load = addr = N_TXTADDR(*a);
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xcopy(idi, ido, le32toh(a->a_text), N_TXTOFF(*a));
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addr += le32toh(a->a_text);
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if (N_DATADDR(*a) != addr)
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return -1;
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xcopy(idi, ido, le32toh(a->a_data), N_DATOFF(*a));
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addr += le32toh(a->a_data);
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kh->dload = load;
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kh->dsize = addr - load;
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kh->isize = kh->dsize + le32toh(a->a_bss);
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kh->entry = le32toh(a->a_entry);
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return 0;
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}
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