/* $NetBSD: freebsd_exec_elf32.c,v 1.12 2003/10/31 14:04:35 drochner Exp $ */ /* * Copyright (c) 1993, 1994 Christopher G. Demetriou * All rights reserved. * * 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 Christopher G. Demetriou. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include __KERNEL_RCSID(0, "$NetBSD: freebsd_exec_elf32.c,v 1.12 2003/10/31 14:04:35 drochner Exp $"); #include #include #include #include #include #include #ifndef ELFSIZE # define ELFSIZE 32 #endif /* !ELFSIZE */ #include #include #include #include int ELFNAME2(freebsd,probe)(p, epp, veh, itp, pos) struct proc *p; struct exec_package *epp; void *veh; char *itp; vaddr_t *pos; { int error; size_t i; size_t phsize; Elf_Ehdr *eh = (Elf_Ehdr *) veh; Elf_Phdr *ph; Elf_Phdr *ephp; Elf_Nhdr *np; static const char wantBrand[] = FREEBSD_ELF_BRAND_STRING; static const char wantInterp[] = FREEBSD_ELF_INTERP_PREFIX_STRING; /* * Insist that the executable have a brand, and that it be "FreeBSD". * Newer FreeBSD binaries have OSABI set to ELFOSABI_FREEBSD. This * is arguably broken, but they seem to think they need it, for * whatever reason. */ #ifndef EI_BRAND #define EI_BRAND 8 #endif if ((eh->e_ident[EI_BRAND] == '\0' || strcmp(&eh->e_ident[EI_BRAND], wantBrand) != 0) && eh->e_ident[EI_OSABI] != ELFOSABI_FREEBSD) return ENOEXEC; i = eh->e_phnum; if (i != 0) { phsize = i * sizeof(Elf_Phdr); ph = (Elf_Phdr *) malloc(phsize, M_TEMP, M_WAITOK); if ((error = exec_read_from(p, epp->ep_vp, eh->e_phoff, ph, phsize)) != 0) goto bad1; for (ephp = ph; i--; ephp++) { if (ephp->p_type != PT_INTERP) continue; /* Check for "legal" intepreter name. */ if (ephp->p_filesz < sizeof wantInterp) goto bad1; np = (Elf_Nhdr *) malloc(ephp->p_filesz+1, M_TEMP, M_WAITOK); if (((error = exec_read_from(p, epp->ep_vp, ephp->p_offset, np, ephp->p_filesz)) != 0)) goto bad2; if (strncmp((char *)np, wantInterp, sizeof wantInterp - 1)) goto bad2; free(np, M_TEMP); break; } free(ph, M_TEMP); } if (itp) { if ((error = emul_find_interp(p, epp->ep_esch->es_emul->e_path, itp))) return error; } #ifdef DEBUG_FREEBSD_ELF printf("freebsd_elf32_probe: returning 0\n"); #endif return 0; bad2: free(np, M_TEMP); bad1: free(ph, M_TEMP); return ENOEXEC; }