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Annotation of sys/compat/svr4/svr4_exec.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: svr4_exec.c,v 1.15 2006/01/19 17:54:56 mickey Exp $    */
                      2: /*     $NetBSD: svr4_exec.c,v 1.16 1995/10/14 20:24:20 christos Exp $   */
                      3:
                      4: /*
                      5:  * Copyright (c) 1994 Christos Zoulas
                      6:  * All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. The name of the author may not be used to endorse or promote products
                     17:  *    derived from this software without specific prior written permission
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     20:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     21:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     22:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     23:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     24:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     25:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     26:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     27:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     28:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     29:  */
                     30:
                     31: #include <sys/param.h>
                     32: #include <sys/systm.h>
                     33: #include <sys/kernel.h>
                     34: #include <sys/proc.h>
                     35: #include <sys/malloc.h>
                     36: #include <sys/namei.h>
                     37: #include <sys/vnode.h>
                     38: #include <sys/exec.h>
                     39: #include <sys/exec_elf.h>
                     40: #include <sys/exec_olf.h>
                     41:
                     42: #include <sys/mman.h>
                     43: #include <uvm/uvm_extern.h>
                     44:
                     45: #include <machine/cpu.h>
                     46: #include <machine/reg.h>
                     47: #include <machine/svr4_machdep.h>
                     48:
                     49: #include <compat/svr4/svr4_util.h>
                     50: #include <compat/svr4/svr4_syscall.h>
                     51: #include <compat/svr4/svr4_exec.h>
                     52: #include <compat/svr4/svr4_errno.h>
                     53:
                     54: static void *svr4_copyargs(struct exec_package *, struct ps_strings *,
                     55:                               void *, void *);
                     56:
                     57: const char svr4_emul_path[] = "/emul/svr4";
                     58: extern char svr4_sigcode[], svr4_esigcode[];
                     59: extern struct sysent svr4_sysent[];
                     60: #ifdef SYSCALL_DEBUG
                     61: extern char *svr4_syscallnames[];
                     62: #endif
                     63:
                     64: struct emul emul_svr4 = {
                     65:        "svr4",
                     66:        native_to_svr4_errno,
                     67:        svr4_sendsig,
                     68:        SVR4_SYS_syscall,
                     69:        SVR4_SYS_MAXSYSCALL,
                     70:        svr4_sysent,
                     71: #ifdef SYSCALL_DEBUG
                     72:        svr4_syscallnames,
                     73: #else
                     74:        NULL,
                     75: #endif
                     76:        SVR4_AUX_ARGSIZ,
                     77:        svr4_copyargs,
                     78:        setregs,
                     79:        exec_elf32_fixup,
                     80:        svr4_sigcode,
                     81:        svr4_esigcode,
                     82: };
                     83:
                     84: static void *
                     85: svr4_copyargs(pack, arginfo, stack, argp)
                     86:        struct exec_package *pack;
                     87:        struct ps_strings *arginfo;
                     88:        void *stack;
                     89:        void *argp;
                     90: {
                     91:        AuxInfo *a;
                     92:
                     93:        if (!(a = (AuxInfo *)elf32_copyargs(pack, arginfo, stack, argp)))
                     94:                return (NULL);
                     95: #ifdef SVR4_COMPAT_SOLARIS2
                     96:        if (pack->ep_emul_arg) {
                     97:                a->au_id = AUX_sun_uid;
                     98:                a->au_v = p->p_ucred->cr_uid;
                     99:                a++;
                    100:
                    101:                a->au_id = AUX_sun_ruid;
                    102:                a->au_v = p->p_cred->ruid;
                    103:                a++;
                    104:
                    105:                a->au_id = AUX_sun_gid;
                    106:                a->au_v = p->p_ucred->cr_gid;
                    107:                a++;
                    108:
                    109:                a->au_id = AUX_sun_rgid;
                    110:                a->au_v = p->p_cred->rgid;
                    111:                a++;
                    112:        }
                    113: #endif
                    114:        return (a);
                    115: }
                    116:
                    117: int
                    118: svr4_elf_probe(p, epp, itp, pos, os)
                    119:        struct proc *p;
                    120:        struct exec_package *epp;
                    121:        char *itp;
                    122:        u_long *pos;
                    123:        u_int8_t *os;
                    124: {
                    125:        char *bp;
                    126:        int error;
                    127:        size_t len;
                    128:
                    129:        if (itp) {
                    130:                if ((error = emul_find(p, NULL, svr4_emul_path, itp, &bp, 0)))
                    131:                        return (error);
                    132:                if ((error = copystr(bp, itp, MAXPATHLEN, &len)))
                    133:                        return (error);
                    134:                free(bp, M_TEMP);
                    135:        }
                    136:        epp->ep_emul = &emul_svr4;
                    137:        *pos = SVR4_INTERP_ADDR;
                    138:        if (*os == OOS_NULL)
                    139:                *os = OOS_SVR4;
                    140:        return (0);
                    141: }