148905Srnordier/* 248905Srnordier * Copyright (c) 1999 Global Technology Associates, Inc. 348905Srnordier * All rights reserved. 448905Srnordier * 548905Srnordier * Redistribution and use in source and binary forms, with or without 648905Srnordier * modification, are permitted provided that the following conditions 748905Srnordier * are met: 848905Srnordier * 1. Redistributions of source code must retain the above copyright 948905Srnordier * notice, this list of conditions and the following disclaimer. 1048905Srnordier * 2. Redistributions in binary form must reproduce the above copyright 1148905Srnordier * notice, this list of conditions and the following disclaimer in the 1248905Srnordier * documentation and/or other materials provided with the distribution. 1348905Srnordier * 1448905Srnordier * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND 1548905Srnordier * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1648905Srnordier * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 1748905Srnordier * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 1848905Srnordier * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 1948905Srnordier * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 2048905Srnordier * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 2148905Srnordier * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 2248905Srnordier * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 2348905Srnordier * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 2448905Srnordier * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2548905Srnordier * 2650479Speter * $FreeBSD$ 2748905Srnordier */ 2848905Srnordier 29130927Sobrien#define _KERNEL 30130927Sobrien#include <sys/param.h> 31130927Sobrien#undef _KERNEL 3248905Srnordier#include <sys/types.h> 3348905Srnordier#include <sys/stat.h> 3448905Srnordier#include <sys/wait.h> 3548905Srnordier 3648905Srnordier#include <err.h> 3748905Srnordier#include <fcntl.h> 3848905Srnordier#include <stdio.h> 3948905Srnordier#include <stdlib.h> 4048905Srnordier#include <unistd.h> 4148905Srnordier 42130927Sobrien#include <a.out.h> 4348905Srnordier 4468313Srnordier#include "aouthdr.h" 4548905Srnordier#include "elfhdr.h" 4648905Srnordier#include "kgzip.h" 4748905Srnordier 4848905Srnordierstatic void mk_data(const struct iodesc *i, const struct iodesc *, 4968313Srnordier struct kgz_hdr *, size_t); 5048905Srnordierstatic int ld_elf(const struct iodesc *, const struct iodesc *, 5148905Srnordier struct kgz_hdr *, const Elf32_Ehdr *); 5248905Srnordierstatic int ld_aout(const struct iodesc *, const struct iodesc *, 53130927Sobrien struct kgz_hdr *, const struct exec *); 5448905Srnordier 5548905Srnordier/* 5648905Srnordier * Compress executable and output it in relocatable object format. 5748905Srnordier */ 5848905Srnordiervoid 5948905Srnordierkgzcmp(struct kgz_hdr *kh, const char *f1, const char *f2) 6048905Srnordier{ 6148905Srnordier struct iodesc idi, ido; 62112089Sru struct kgz_hdr khle; 6348905Srnordier 6448905Srnordier if ((idi.fd = open(idi.fname = f1, O_RDONLY)) == -1) 6548905Srnordier err(1, "%s", idi.fname); 6648905Srnordier if ((ido.fd = open(ido.fname = f2, O_CREAT | O_TRUNC | O_WRONLY, 6748905Srnordier 0666)) == -1) 6848905Srnordier err(1, "%s", ido.fname); 6948905Srnordier kh->ident[0] = KGZ_ID0; 7048905Srnordier kh->ident[1] = KGZ_ID1; 7148905Srnordier kh->ident[2] = KGZ_ID2; 7248905Srnordier kh->ident[3] = KGZ_ID3; 7368313Srnordier mk_data(&idi, &ido, kh, 7468313Srnordier (format == F_AOUT ? sizeof(struct kgz_aouthdr0) : 7568313Srnordier sizeof(struct kgz_elfhdr)) + 7668313Srnordier sizeof(struct kgz_hdr)); 7748905Srnordier kh->dload &= 0xffffff; 7848905Srnordier kh->entry &= 0xffffff; 7968313Srnordier if (format == F_AOUT) { 8068313Srnordier struct kgz_aouthdr0 ahdr0 = aouthdr0; 8168313Srnordier struct kgz_aouthdr1 ahdr1 = aouthdr1; 8268313Srnordier unsigned x = (sizeof(struct kgz_hdr) + kh->nsize) & (16 - 1); 8368313Srnordier if (x) { 8468313Srnordier x = 16 - x; 8568313Srnordier xzero(&ido, x); 8668313Srnordier } 8768313Srnordier xwrite(&ido, &ahdr1, sizeof(ahdr1)); 8868313Srnordier ahdr0.a.a_data += kh->nsize + x; 8968313Srnordier xseek(&ido, 0); 9068313Srnordier xwrite(&ido, &ahdr0, sizeof(ahdr0)); 9168313Srnordier } else { 9268313Srnordier struct kgz_elfhdr ehdr = elfhdr; 93130927Sobrien ehdr.st[KGZ_ST_KGZ_NDATA].st_size = htole32(kh->nsize); 94112089Sru ehdr.sh[KGZ_SH_DATA].sh_size = 95130927Sobrien htole32(le32toh(ehdr.sh[KGZ_SH_DATA].sh_size) + kh->nsize); 9668313Srnordier xseek(&ido, 0); 9768313Srnordier xwrite(&ido, &ehdr, sizeof(ehdr)); 9868313Srnordier } 99112089Sru khle = *kh; 100130927Sobrien khle.dload = htole32(khle.dload); 101130927Sobrien khle.dsize = htole32(khle.dsize); 102130927Sobrien khle.isize = htole32(khle.isize); 103130927Sobrien khle.entry = htole32(khle.entry); 104130927Sobrien khle.nsize = htole32(khle.nsize); 105112089Sru xwrite(&ido, &khle, sizeof(khle)); 10648905Srnordier xclose(&ido); 10748905Srnordier xclose(&idi); 10848905Srnordier} 10948905Srnordier 11048905Srnordier/* 11148905Srnordier * Make encoded (compressed) data. 11248905Srnordier */ 11348905Srnordierstatic void 11448905Srnordiermk_data(const struct iodesc * idi, const struct iodesc * ido, 11568313Srnordier struct kgz_hdr * kh, size_t off) 11648905Srnordier{ 11748905Srnordier union { 118130927Sobrien struct exec ex; 11948905Srnordier Elf32_Ehdr ee; 12048905Srnordier } hdr; 12148905Srnordier struct stat sb; 12248905Srnordier struct iodesc idp; 12348905Srnordier int fd[2]; 12448905Srnordier pid_t pid; 12548905Srnordier size_t n; 12648905Srnordier int fmt, status, e; 12748905Srnordier 12848905Srnordier n = xread(idi, &hdr, sizeof(hdr), 0); 12948905Srnordier fmt = 0; 13048905Srnordier if (n >= sizeof(hdr.ee) && IS_ELF(hdr.ee)) 13148905Srnordier fmt = F_ELF; 132130927Sobrien else if (n >= sizeof(hdr.ex) && N_GETMAGIC(hdr.ex) == ZMAGIC) 13348905Srnordier fmt = F_AOUT; 13448905Srnordier if (!fmt) 13548905Srnordier errx(1, "%s: Format not supported", idi->fname); 13668313Srnordier xseek(ido, off); 13748905Srnordier if (pipe(fd)) 13848905Srnordier err(1, NULL); 13948905Srnordier switch (pid = fork()) { 14048905Srnordier case -1: 14148905Srnordier err(1, NULL); 14248905Srnordier case 0: 14348905Srnordier close(fd[1]); 14448905Srnordier dup2(fd[0], STDIN_FILENO); 14548905Srnordier close(fd[0]); 14648905Srnordier close(idi->fd); 14748905Srnordier dup2(ido->fd, STDOUT_FILENO); 14848905Srnordier close(ido->fd); 149112047Sru execlp("gzip", "gzip", "-9n", (char *)NULL); 15048905Srnordier warn(NULL); 15148905Srnordier _exit(1); 15248905Srnordier default: 15348905Srnordier close(fd[0]); 15448905Srnordier idp.fname = "(pipe)"; 15548905Srnordier idp.fd = fd[1]; 15648905Srnordier e = fmt == F_ELF ? ld_elf(idi, &idp, kh, &hdr.ee) : 15748905Srnordier fmt == F_AOUT ? ld_aout(idi, &idp, kh, &hdr.ex) : -1; 15848905Srnordier close(fd[1]); 15948905Srnordier if ((pid = waitpid(pid, &status, 0)) == -1) 16048905Srnordier err(1, NULL); 16148905Srnordier if (WIFSIGNALED(status) || WEXITSTATUS(status)) 16248905Srnordier exit(1); 16348905Srnordier } 16448905Srnordier if (e) 16548905Srnordier errx(1, "%s: Invalid format", idi->fname); 16648905Srnordier if (fstat(ido->fd, &sb)) 16762986Skris err(1, "%s", ido->fname); 16868313Srnordier kh->nsize = sb.st_size - off; 16948905Srnordier} 17048905Srnordier 17148905Srnordier/* 17248905Srnordier * "Load" an ELF-format executable. 17348905Srnordier */ 17448905Srnordierstatic int 17548905Srnordierld_elf(const struct iodesc * idi, const struct iodesc * ido, 17648905Srnordier struct kgz_hdr * kh, const Elf32_Ehdr * e) 17748905Srnordier{ 17848905Srnordier Elf32_Phdr p; 17948905Srnordier size_t load, addr, n; 18048905Srnordier unsigned x, i; 18148905Srnordier 18248905Srnordier load = addr = n = 0; 18348905Srnordier for (x = i = 0; i < e->e_phnum; i++) { 18448905Srnordier if (xread(idi, &p, sizeof(p), 18548905Srnordier e->e_phoff + i * e->e_phentsize) != e->e_phentsize) 18648905Srnordier return -1; 18748905Srnordier if (p.p_type != PT_LOAD) 18848905Srnordier continue; 18948905Srnordier if (!x) 19048905Srnordier load = addr = p.p_vaddr; 19148905Srnordier else { 19248905Srnordier if (p.p_vaddr < addr) 19348905Srnordier return -1; 19448905Srnordier n = p.p_vaddr - addr; 19548905Srnordier if (n) { 19648905Srnordier xzero(ido, n); 19748905Srnordier addr += n; 19848905Srnordier } 19948905Srnordier } 20048905Srnordier if (p.p_memsz < p.p_filesz) 20148905Srnordier return -1; 20248905Srnordier n = p.p_memsz - p.p_filesz; 20348905Srnordier xcopy(idi, ido, p.p_filesz, p.p_offset); 20448905Srnordier addr += p.p_filesz; 20548905Srnordier x++; 20648905Srnordier } 20748905Srnordier if (!x) 20848905Srnordier return -1; 20948905Srnordier kh->dload = load; 21048905Srnordier kh->dsize = addr - load; 21148905Srnordier kh->isize = kh->dsize + n; 21248905Srnordier kh->entry = e->e_entry; 21348905Srnordier return 0; 21448905Srnordier} 21548905Srnordier 21648905Srnordier/* 21748905Srnordier * "Load" an a.out-format executable. 21848905Srnordier */ 21948905Srnordierstatic int 22048905Srnordierld_aout(const struct iodesc * idi, const struct iodesc * ido, 221130927Sobrien struct kgz_hdr * kh, const struct exec * a) 22248905Srnordier{ 22348905Srnordier size_t load, addr; 22448905Srnordier 225130927Sobrien load = addr = N_TXTADDR(*a); 226130927Sobrien xcopy(idi, ido, le32toh(a->a_text), N_TXTOFF(*a)); 227130927Sobrien addr += le32toh(a->a_text); 228130927Sobrien if (N_DATADDR(*a) != addr) 22948905Srnordier return -1; 230130927Sobrien xcopy(idi, ido, le32toh(a->a_data), N_DATOFF(*a)); 231130927Sobrien addr += le32toh(a->a_data); 23248905Srnordier kh->dload = load; 23348905Srnordier kh->dsize = addr - load; 234130927Sobrien kh->isize = kh->dsize + le32toh(a->a_bss); 235130927Sobrien kh->entry = le32toh(a->a_entry); 23648905Srnordier return 0; 23748905Srnordier} 238