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: }
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