/* $OpenBSD: freebsd_exec.c,v 1.19 2009/03/05 19:52:23 kettenis Exp $ */ /* $NetBSD: freebsd_exec.c,v 1.2 1996/05/18 16:02:08 christos 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern struct sysent freebsd_sysent[]; #ifdef SYSCALL_DEBUG extern char *freebsd_syscallnames[]; #endif extern const char freebsd_emul_path[]; struct emul emul_freebsd_aout = { "freebsd", NULL, freebsd_sendsig, FREEBSD_SYS_syscall, FREEBSD_SYS_MAXSYSCALL, freebsd_sysent, #ifdef SYSCALL_DEBUG freebsd_syscallnames, #else NULL, #endif 0, copyargs, setregs, NULL, coredump_trad, freebsd_sigcode, freebsd_esigcode, }; struct emul emul_freebsd_elf = { "freebsd", NULL, freebsd_sendsig, FREEBSD_SYS_syscall, FREEBSD_SYS_MAXSYSCALL, freebsd_sysent, #ifdef SYSCALL_DEBUG freebsd_syscallnames, #else NULL, #endif FREEBSD_ELF_AUX_ARGSIZ, elf32_copyargs, setregs, exec_elf32_fixup, coredump_trad, freebsd_sigcode, freebsd_esigcode, }; /* * exec_aout_makecmds(): Check if it's an a.out-format executable. * * Given a proc pointer and an exec package pointer, see if the referent * of the epp is in a.out format. First check 'standard' magic numbers for * this architecture. If that fails, try a cpu-dependent hook. * * This function, in the former case, or the hook, in the latter, is * responsible for creating a set of vmcmds which can be used to build * the process's vm space and inserting them into the exec package. */ int exec_freebsd_aout_makecmds(p, epp) struct proc *p; struct exec_package *epp; { u_long midmag; int error = ENOEXEC; struct exec *execp = epp->ep_hdr; if (epp->ep_hdrvalid < sizeof(struct exec)) return ENOEXEC; midmag = FREEBSD_N_GETMID(*execp) << 16 | FREEBSD_N_GETMAGIC(*execp); /* assume FreeBSD's MID_MACHINE and [ZQNO]MAGIC is same as NetBSD's */ switch (midmag) { case (MID_MACHINE << 16) | ZMAGIC: error = exec_aout_prep_oldzmagic(p, epp); break; case (MID_MACHINE << 16) | QMAGIC: error = exec_aout_prep_zmagic(p, epp); break; case (MID_MACHINE << 16) | NMAGIC: error = exec_aout_prep_nmagic(p, epp); break; case (MID_MACHINE << 16) | OMAGIC: error = exec_aout_prep_omagic(p, epp); break; } if (error == 0) epp->ep_emul = &emul_freebsd_aout; else kill_vmcmds(&epp->ep_vmcmds); return error; } int exec_freebsd_elf32_makecmds(struct proc *p, struct exec_package *epp) { if (!(emul_freebsd_elf.e_flags & EMUL_ENABLED)) return (ENOEXEC); return exec_elf32_makecmds(p, epp); } int freebsd_elf_probe(p, epp, itp, pos, os) struct proc *p; struct exec_package *epp; char *itp; u_long *pos; u_int8_t *os; { Elf32_Ehdr *eh = epp->ep_hdr; char *bp, *brand; int error; size_t len; if (!(emul_freebsd_elf.e_flags & EMUL_ENABLED)) return (ENOEXEC); /* * Older FreeBSD ELF binaries use a brand; newer ones use EI_OSABI */ if (eh->e_ident[EI_OSABI] != ELFOSABI_FREEBSD) { brand = elf32_check_brand(eh); if (brand == NULL || strcmp(brand, "FreeBSD") != 0) return (EINVAL); } if (itp) { if ((error = emul_find(p, NULL, freebsd_emul_path, itp, &bp, 0))) return (error); if ((error = copystr(bp, itp, MAXPATHLEN, &len))) return (error); free(bp, M_TEMP); } epp->ep_emul = &emul_freebsd_elf; *pos = ELF32_NO_ADDR; if (*os == OOS_NULL) *os = OOS_FREEBSD; return (0); }