1 /* $NetBSD: sunos_exec_aout.c,v 1.19 2015/10/18 16:59:19 maxv Exp $ */
2
3 /*
4 * Copyright (c) 1993 Theo de Raadt
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, 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 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: sunos_exec_aout.c,v 1.19 2015/10/18 16:59:19 maxv Exp $");
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/filedesc.h>
36 #include <sys/kernel.h>
37 #include <sys/proc.h>
38 #include <sys/mount.h>
39 #include <sys/malloc.h>
40 #include <sys/namei.h>
41 #include <sys/signalvar.h>
42 #include <sys/vnode.h>
43 #include <sys/file.h>
44 #include <sys/exec.h>
45 #include <sys/exec_aout.h>
46 #include <sys/resourcevar.h>
47 #include <sys/wait.h>
48
49 #include <sys/mman.h>
50
51 #include <sys/cpu.h>
52 #include <machine/reg.h>
53
54 #include <compat/sunos/sunos.h>
55 #include <compat/sunos/sunos_exec.h>
56 #include <compat/sunos/sunos_syscall.h>
57
58 #ifdef __sparc__
59 #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic
60 #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic
61 #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic
62 #endif
63
64 int sunos_exec_aout_prep_zmagic(struct lwp *, struct exec_package *);
65 int sunos_exec_aout_prep_nmagic(struct lwp *, struct exec_package *);
66 int sunos_exec_aout_prep_omagic(struct lwp *, struct exec_package *);
67
68 int
exec_sunos_aout_makecmds(struct lwp * l,struct exec_package * epp)69 exec_sunos_aout_makecmds(struct lwp *l, struct exec_package *epp)
70 {
71 struct sunos_exec *sunmag = epp->ep_hdr;
72 int error = ENOEXEC;
73
74 if (epp->ep_hdrvalid < sizeof(struct sunos_exec))
75 return ENOEXEC;
76 if (!SUNOS_M_NATIVE(sunmag->a_machtype))
77 return (ENOEXEC);
78
79 switch (sunmag->a_magic) {
80 case ZMAGIC:
81 error = sunos_exec_aout_prep_zmagic(l, epp);
82 break;
83 case NMAGIC:
84 error = sunos_exec_aout_prep_nmagic(l, epp);
85 break;
86 case OMAGIC:
87 error = sunos_exec_aout_prep_omagic(l, epp);
88 break;
89 }
90 return error;
91 }
92
93 /*
94 * the code below is only needed for sun2/sun3 emulation.
95 */
96 #ifndef __sparc__
97
98 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */
99 #define SEGSIZ 0x20000
100 #define SUNOS_N_TXTADDR(x,m) 0x2000
101 #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \
102 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \
103 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1))))
104 #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data)
105
106 #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec))
107 #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text)
108
109 /*
110 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package
111 *
112 * First, set of the various offsets/lengths in the exec package.
113 *
114 * Then, mark the text image busy (so it can be demand paged) or error
115 * out if this is not possible. Finally, set up vmcmds for the
116 * text, data, bss, and stack segments.
117 */
118 int
sunos_exec_aout_prep_zmagic(struct lwp * l,struct exec_package * epp)119 sunos_exec_aout_prep_zmagic(struct lwp *l, struct exec_package *epp)
120 {
121 struct exec *execp = epp->ep_hdr;
122 int error;
123
124 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC);
125 epp->ep_tsize = execp->a_text;
126 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC);
127 epp->ep_dsize = execp->a_data + execp->a_bss;
128 epp->ep_entry = execp->a_entry;
129
130 error = vn_marktext(epp->ep_vp);
131 if (error)
132 return (error);
133
134 /* set up command for text segment */
135 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
136 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC),
137 VM_PROT_READ|VM_PROT_EXECUTE);
138
139 /* set up command for data segment */
140 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
141 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC),
142 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
143
144 /* set up command for bss segment */
145 if (execp->a_bss)
146 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
147 epp->ep_daddr + execp->a_data, NULLVP, 0,
148 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
149
150 return (*epp->ep_esch->es_setup_stack)(l, epp);
151 }
152
153 /*
154 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package
155 */
156 int
sunos_exec_aout_prep_nmagic(struct lwp * l,struct exec_package * epp)157 sunos_exec_aout_prep_nmagic(struct lwp *l, struct exec_package *epp)
158 {
159 struct exec *execp = epp->ep_hdr;
160 long bsize, baddr;
161
162 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC);
163 epp->ep_tsize = execp->a_text;
164 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC);
165 epp->ep_dsize = execp->a_data + execp->a_bss;
166 epp->ep_entry = execp->a_entry;
167
168 /* set up command for text segment */
169 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
170 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC),
171 VM_PROT_READ|VM_PROT_EXECUTE);
172
173 /* set up command for data segment */
174 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
175 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC),
176 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
177
178 /* set up command for bss segment */
179 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
180 bsize = epp->ep_daddr + epp->ep_dsize - baddr;
181 if (bsize > 0)
182 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
183 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
184
185 return (*epp->ep_esch->es_setup_stack)(l, epp);
186 }
187
188 /*
189 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package
190 */
191 int
sunos_exec_aout_prep_omagic(struct lwp * l,struct exec_package * epp)192 sunos_exec_aout_prep_omagic(struct lwp *l, struct exec_package *epp)
193 {
194 struct exec *execp = epp->ep_hdr;
195 long bsize, baddr;
196
197 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC);
198 epp->ep_tsize = execp->a_text;
199 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC);
200 epp->ep_dsize = execp->a_data + execp->a_bss;
201 epp->ep_entry = execp->a_entry;
202
203 /* set up command for text and data segments */
204 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
205 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
206 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
207
208 /* set up command for bss segment */
209 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
210 bsize = epp->ep_daddr + epp->ep_dsize - baddr;
211 if (bsize > 0)
212 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
213 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
214
215 return (*epp->ep_esch->es_setup_stack)(l, epp);
216 }
217 #endif /* !sparc */
218