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Annotation of src/usr.bin/file/elfclass.h, Revision 1.2

1.2     ! chl         1: /*     $OpenBSD$ */
1.1       chl         2: /*
                      3:  * Copyright (c) Christos Zoulas 2008.
                      4:  * All Rights Reserved.
                      5:  *
                      6:  * Redistribution and use in source and binary forms, with or without
                      7:  * modification, are permitted provided that the following conditions
                      8:  * are met:
                      9:  * 1. Redistributions of source code must retain the above copyright
                     10:  *    notice immediately at the beginning of the file, without modification,
                     11:  *    this list of conditions, and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  *
                     16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     17:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     18:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     19:  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
                     20:  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     21:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     22:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     24:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     25:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     26:  * SUCH DAMAGE.
                     27:  */
                     28:        if (nbytes <= sizeof(elfhdr))
                     29:                return 0;
                     30:
                     31:        u.l = 1;
                     32:        (void)memcpy(&elfhdr, buf, sizeof elfhdr);
                     33:        swap = (u.c[sizeof(int32_t) - 1] + 1) != elfhdr.e_ident[EI_DATA];
                     34:
                     35:        type = elf_getu16(swap, elfhdr.e_type);
                     36:        switch (type) {
                     37: #ifdef ELFCORE
                     38:        case ET_CORE:
                     39:                if (dophn_core(ms, class, swap, fd,
                     40:                    (off_t)elf_getu(swap, elfhdr.e_phoff),
                     41:                    elf_getu16(swap, elfhdr.e_phnum),
                     42:                    (size_t)elf_getu16(swap, elfhdr.e_phentsize),
                     43:                    fsize, &flags) == -1)
                     44:                        return -1;
                     45:                break;
                     46: #endif
                     47:        case ET_EXEC:
                     48:        case ET_DYN:
                     49:                if (dophn_exec(ms, class, swap, fd,
                     50:                    (off_t)elf_getu(swap, elfhdr.e_phoff),
                     51:                    elf_getu16(swap, elfhdr.e_phnum),
                     52:                    (size_t)elf_getu16(swap, elfhdr.e_phentsize),
                     53:                    fsize, &flags) == -1)
                     54:                        return -1;
                     55:                /*FALLTHROUGH*/
                     56:        case ET_REL:
                     57:                if (doshn(ms, class, swap, fd,
                     58:                    (off_t)elf_getu(swap, elfhdr.e_shoff),
                     59:                    elf_getu16(swap, elfhdr.e_shnum),
                     60:                    (size_t)elf_getu16(swap, elfhdr.e_shentsize),
                     61:                    &flags) == -1)
                     62:                        return -1;
                     63:                break;
                     64:
                     65:        default:
                     66:                break;
                     67:        }
                     68:        return 1;