/* $NetBSD: loadfile.c,v 1.10 2000/12/03 02:53:04 tsutsui Exp $ */ /* $OpenBSD: loadfile.c,v 1.9 2004/02/10 01:01:13 tom Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center and by Christos Zoulas. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)boot.c 8.1 (Berkeley) 6/10/93 */ #ifdef _STANDALONE #include #include #else #include #include #include #include #include #include #include #endif #include #include #include "loadfile.h" #ifdef BOOT_ECOFF #include static int coff_exec(int, struct ecoff_exechdr *, u_long *, int); #endif #ifdef BOOT_ELF #include static int elf_exec(int, Elf_Ehdr *, u_long *, int); #endif #ifdef BOOT_AOUT #include static int aout_exec(int, struct exec *, u_long *, int); #endif /* * Open 'filename', read in program and and return 0 if ok 1 on error. * Fill in marks */ int loadfile(const char *fname, u_long *marks, int flags) { union { #ifdef BOOT_ECOFF struct ecoff_exechdr coff; #endif #ifdef BOOT_ELF Elf_Ehdr elf; #endif #ifdef BOOT_AOUT struct exec aout; #endif } hdr; ssize_t nr; int fd, rval; /* Open the file. */ if ((fd = open(fname, 0)) < 0) { WARN(("open %s", fname ? fname : "")); return -1; } /* Read the exec header. */ if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) { WARN(("read header")); goto err; } #ifdef BOOT_ECOFF if (!ECOFF_BADMAG(&hdr.coff)) { rval = coff_exec(fd, &hdr.coff, marks, flags); } else #endif #ifdef BOOT_ELF if (memcmp(hdr.elf.e_ident, ELFMAG, SELFMAG) == 0 && hdr.elf.e_ident[EI_CLASS] == ELFCLASS) { rval = elf_exec(fd, &hdr.elf, marks, flags); } else #endif #ifdef BOOT_AOUT if (OKMAGIC(N_GETMAGIC(hdr.aout)) #ifndef NO_MID_CHECK && N_GETMID(hdr.aout) == MID_MACHINE #endif ) { rval = aout_exec(fd, &hdr.aout, marks, flags); } else #endif { rval = 1; errno = EFTYPE; WARN(("%s", fname ? fname : "")); } if (rval == 0) { PROGRESS(("=0x%lx\n", marks[MARK_END] - marks[MARK_START])); return fd; } err: (void)close(fd); return -1; } #ifdef BOOT_ECOFF static int coff_exec(int fd, struct ecoff_exechdr *coff, u_long *marks, int flags) { paddr_t offset = marks[MARK_START]; paddr_t minp = ~0, maxp = 0, pos; /* Read in text. */ if (lseek(fd, ECOFF_TXTOFF(coff), SEEK_SET) == -1) { WARN(("lseek text")); return 1; } if (coff->a.tsize != 0) { if (flags & LOAD_TEXT) { PROGRESS(("%lu", coff->a.tsize)); if (READ(fd, coff->a.text_start, coff->a.tsize) != coff->a.tsize) { return 1; } } else { if (lseek(fd, coff->a.tsize, SEEK_CUR) == -1) { WARN(("read text")); return 1; } } if (flags & (COUNT_TEXT|LOAD_TEXT)) { pos = coff->a.text_start; if (minp > pos) minp = pos; pos += coff->a.tsize; if (maxp < pos) maxp = pos; } } /* Read in data. */ if (coff->a.dsize != 0) { if (flags & LOAD_DATA) { PROGRESS(("+%lu", coff->a.dsize)); if (READ(fd, coff->a.data_start, coff->a.dsize) != coff->a.dsize) { WARN(("read data")); return 1; } } if (flags & (COUNT_DATA|LOAD_DATA)) { pos = coff->a.data_start; if (minp > pos) minp = pos; pos += coff->a.dsize; if (maxp < pos) maxp = pos; } } /* Zero out bss. */ if (coff->a.bsize != 0) { if (flags & LOAD_BSS) { PROGRESS(("+%lu", coff->a.bsize)); BZERO(coff->a.bss_start, coff->a.bsize); } if (flags & (COUNT_BSS|LOAD_BSS)) { pos = coff->a.bss_start; if (minp > pos) minp = pos; pos = coff->a.bsize; if (maxp < pos) maxp = pos; } } marks[MARK_START] = LOADADDR(minp); marks[MARK_ENTRY] = LOADADDR(coff->a.entry); marks[MARK_NSYM] = 1; /* XXX: Kernel needs >= 0 */ marks[MARK_SYM] = LOADADDR(maxp); marks[MARK_END] = LOADADDR(maxp); return 0; } #endif /* BOOT_ECOFF */ #ifdef BOOT_ELF static int elf_exec(int fd, Elf_Ehdr *elf, u_long *marks, int flags) { Elf_Shdr *shp; Elf_Phdr *phdr; Elf_Off off; int i; size_t sz; int first; int havesyms; paddr_t minp = ~0, maxp = 0, pos = 0; paddr_t offset = marks[MARK_START], shpp, elfp; sz = elf->e_phnum * sizeof(Elf_Phdr); phdr = ALLOC(sz); if (lseek(fd, elf->e_phoff, SEEK_SET) == -1) { WARN(("lseek phdr")); FREE(phdr, sz); return 1; } if (read(fd, phdr, sz) != sz) { WARN(("read program headers")); FREE(phdr, sz); return 1; } for (first = 1, i = 0; i < elf->e_phnum; i++) { if (phdr[i].p_type != PT_LOAD || (phdr[i].p_flags & (PF_W|PF_R|PF_X)) == 0) continue; #define IS_TEXT(p) (p.p_flags & PF_X) #define IS_DATA(p) ((p.p_flags & PF_X) == 0) #define IS_BSS(p) (p.p_filesz < p.p_memsz) /* * XXX: Assume first address is lowest */ if ((IS_TEXT(phdr[i]) && (flags & LOAD_TEXT)) || (IS_DATA(phdr[i]) && (flags & LOAD_DATA))) { /* Read in segment. */ PROGRESS(("%s%lu", first ? "" : "+", (u_long)phdr[i].p_filesz)); if (lseek(fd, phdr[i].p_offset, SEEK_SET) == -1) { WARN(("lseek text")); FREE(phdr, sz); return 1; } if (READ(fd, phdr[i].p_vaddr, phdr[i].p_filesz) != phdr[i].p_filesz) { WARN(("read text")); FREE(phdr, sz); return 1; } first = 0; } if ((IS_TEXT(phdr[i]) && (flags & (LOAD_TEXT|COUNT_TEXT))) || (IS_DATA(phdr[i]) && (flags & (LOAD_DATA|COUNT_TEXT)))) { pos = phdr[i].p_vaddr; if (minp > pos) minp = pos; pos += phdr[i].p_filesz; if (maxp < pos) maxp = pos; } /* Zero out bss. */ if (IS_BSS(phdr[i]) && (flags & LOAD_BSS)) { PROGRESS(("+%lu", (u_long)(phdr[i].p_memsz - phdr[i].p_filesz))); BZERO((phdr[i].p_vaddr + phdr[i].p_filesz), phdr[i].p_memsz - phdr[i].p_filesz); } if (IS_BSS(phdr[i]) && (flags & (LOAD_BSS|COUNT_BSS))) { pos += phdr[i].p_memsz - phdr[i].p_filesz; if (maxp < pos) maxp = pos; } } FREE(phdr, sz); /* * Copy the ELF and section headers. */ elfp = maxp = roundup(maxp, sizeof(long)); if (flags & (LOAD_HDR|COUNT_HDR)) maxp += sizeof(Elf_Ehdr); if (flags & (LOAD_SYM|COUNT_SYM)) { if (lseek(fd, elf->e_shoff, SEEK_SET) == -1) { WARN(("lseek section headers")); return 1; } sz = elf->e_shnum * sizeof(Elf_Shdr); shp = ALLOC(sz); if (read(fd, shp, sz) != sz) { WARN(("read section headers")); return 1; } shpp = maxp; maxp += roundup(sz, sizeof(long)); /* * Now load the symbol sections themselves. Make sure the * sections are aligned. Don't bother with string tables if * there are no symbol sections. */ off = roundup((sizeof(Elf_Ehdr) + sz), sizeof(long)); for (havesyms = i = 0; i < elf->e_shnum; i++) if (shp[i].sh_type == SHT_SYMTAB) havesyms = 1; for (first = 1, i = 0; i < elf->e_shnum; i++) { if (shp[i].sh_type == SHT_SYMTAB || shp[i].sh_type == SHT_STRTAB) { if (havesyms && (flags & LOAD_SYM)) { PROGRESS(("%s%ld", first ? " [" : "+", (u_long)shp[i].sh_size)); if (lseek(fd, shp[i].sh_offset, SEEK_SET) == -1) { WARN(("lseek symbols")); FREE(shp, sz); return 1; } if (READ(fd, maxp, shp[i].sh_size) != shp[i].sh_size) { WARN(("read symbols")); FREE(shp, sz); return 1; } } maxp += roundup(shp[i].sh_size, sizeof(long)); shp[i].sh_offset = off; off += roundup(shp[i].sh_size, sizeof(long)); first = 0; } } if (flags & LOAD_SYM) { BCOPY(shp, shpp, sz); if (havesyms && first == 0) PROGRESS(("]")); } FREE(shp, sz); } /* * Frob the copied ELF header to give information relative * to elfp. */ if (flags & LOAD_HDR) { elf->e_phoff = 0; elf->e_shoff = sizeof(Elf_Ehdr); elf->e_phentsize = 0; elf->e_phnum = 0; BCOPY(elf, elfp, sizeof(*elf)); } marks[MARK_START] = LOADADDR(minp); marks[MARK_ENTRY] = LOADADDR(elf->e_entry); marks[MARK_NSYM] = 1; /* XXX: Kernel needs >= 0 */ marks[MARK_SYM] = LOADADDR(elfp); marks[MARK_END] = LOADADDR(maxp); return 0; } #endif /* BOOT_ELF */ #ifdef BOOT_AOUT static int aout_exec(int fd, struct exec *x, u_long *marks, int flags) { u_long entry = x->a_entry; paddr_t aoutp = 0; paddr_t minp, maxp; int cc; paddr_t offset = marks[MARK_START]; u_long magic = N_GETMAGIC(*x); int sub; /* In OMAGIC and NMAGIC, exec header isn't part of text segment */ if (magic == OMAGIC || magic == NMAGIC) sub = 0; else sub = sizeof(*x); minp = maxp = ALIGNENTRY(entry); if (lseek(fd, sizeof(*x), SEEK_SET) == -1) { WARN(("lseek text")); return 1; } /* * Leave a copy of the exec header before the text. * The kernel may use this to verify that the * symbols were loaded by this boot program. */ if (magic == OMAGIC || magic == NMAGIC) { if (flags & LOAD_HDR && maxp >= sizeof(*x)) BCOPY(x, maxp - sizeof(*x), sizeof(*x)); } else { if (flags & LOAD_HDR) BCOPY(x, maxp, sizeof(*x)); if (flags & (LOAD_HDR|COUNT_HDR)) maxp += sizeof(*x); } /* * Read in the text segment. */ if (flags & LOAD_TEXT) { PROGRESS(("%ld", x->a_text)); if (READ(fd, maxp, x->a_text - sub) != x->a_text - sub) { WARN(("read text")); return 1; } } else { if (lseek(fd, x->a_text - sub, SEEK_CUR) == -1) { WARN(("seek text")); return 1; } } if (flags & (LOAD_TEXT|COUNT_TEXT)) maxp += x->a_text - sub; /* * Provide alignment if required */ if (magic == ZMAGIC || magic == NMAGIC) { int size = -(unsigned int)maxp & (__LDPGSZ - 1); if (flags & LOAD_TEXTA) { PROGRESS(("/%d", size)); BZERO(maxp, size); } if (flags & (LOAD_TEXTA|COUNT_TEXTA)) maxp += size; } /* * Read in the data segment. */ if (flags & LOAD_DATA) { PROGRESS(("+%ld", x->a_data)); if (READ(fd, maxp, x->a_data) != x->a_data) { WARN(("read data")); return 1; } } else { if (lseek(fd, x->a_data, SEEK_CUR) == -1) { WARN(("seek data")); return 1; } } if (flags & (LOAD_DATA|COUNT_DATA)) maxp += x->a_data; /* * Zero out the BSS section. * (Kernel doesn't care, but do it anyway.) */ if (flags & LOAD_BSS) { PROGRESS(("+%ld", x->a_bss)); BZERO(maxp, x->a_bss); } if (flags & (LOAD_BSS|COUNT_BSS)) maxp += x->a_bss; /* * Read in the symbol table and strings. * (Always set the symtab size word.) */ if (flags & LOAD_SYM) BCOPY(&x->a_syms, maxp, sizeof(x->a_syms)); if (flags & (LOAD_SYM|COUNT_SYM)) { maxp += sizeof(x->a_syms); aoutp = maxp; } if (x->a_syms > 0) { /* Symbol table and string table length word. */ if (flags & LOAD_SYM) { PROGRESS(("+[%ld", x->a_syms)); if (READ(fd, maxp, x->a_syms) != x->a_syms) { WARN(("read symbols")); return 1; } } else { if (lseek(fd, x->a_syms, SEEK_CUR) == -1) { WARN(("seek symbols")); return 1; } } if (flags & (LOAD_SYM|COUNT_SYM)) maxp += x->a_syms; if (read(fd, &cc, sizeof(cc)) != sizeof(cc)) { WARN(("read string table")); return 1; } if (flags & LOAD_SYM) { BCOPY(&cc, maxp, sizeof(cc)); /* String table. Length word includes itself. */ PROGRESS(("+%d]", cc)); } if (flags & (LOAD_SYM|COUNT_SYM)) maxp += sizeof(cc); cc -= sizeof(int); if (cc <= 0) { WARN(("symbol table too short")); return 1; } if (flags & LOAD_SYM) { if (READ(fd, maxp, cc) != cc) { WARN(("read strings")); return 1; } } else { if (lseek(fd, cc, SEEK_CUR) == -1) { WARN(("seek strings")); return 1; } } if (flags & (LOAD_SYM|COUNT_SYM)) maxp += cc; } marks[MARK_START] = LOADADDR(minp); marks[MARK_ENTRY] = LOADADDR(entry); marks[MARK_NSYM] = x->a_syms; marks[MARK_SYM] = LOADADDR(aoutp); marks[MARK_END] = LOADADDR(maxp); return 0; } #endif /* BOOT_AOUT */