1 /* $NetBSD: sunos_exec_aout.c,v 1.17 2007/12/08 18:36:23 dsl 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 1.17 2007/12/08 18:36:23 dsl 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/resourcevar.h>
46 #include <sys/wait.h>
47
48 #include <sys/mman.h>
49
50 #include <sys/cpu.h>
51 #include <machine/reg.h>
52
53 #include <compat/sunos/sunos.h>
54 #include <compat/sunos/sunos_exec.h>
55 #include <compat/sunos/sunos_syscall.h>
56
57 #ifdef __sparc__
58 #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic
59 #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic
60 #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic
61 #endif
62
63 int sunos_exec_aout_prep_zmagic(struct lwp *, struct exec_package *);
64 int sunos_exec_aout_prep_nmagic(struct lwp *, struct exec_package *);
65 int sunos_exec_aout_prep_omagic(struct lwp *, struct exec_package *);
66
67 int
68 exec_sunos_aout_makecmds(struct lwp *l, struct exec_package *epp)
69 {
70 struct sunos_exec *sunmag = epp->ep_hdr;
71 int error = ENOEXEC;
72
73 if (!SUNOS_M_NATIVE(sunmag->a_machtype))
74 return (ENOEXEC);
75
76 switch (sunmag->a_magic) {
77 case ZMAGIC:
78 error = sunos_exec_aout_prep_zmagic(l, epp);
79 break;
80 case NMAGIC:
81 error = sunos_exec_aout_prep_nmagic(l, epp);
82 break;
83 case OMAGIC:
84 error = sunos_exec_aout_prep_omagic(l, epp);
85 break;
86 }
87 return error;
88 }
89
90 /*
91 * the code below is only needed for sun2/sun3 emulation.
92 */
93 #ifndef __sparc__
94
95 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */
96 #define SEGSIZ 0x20000
97 #define SUNOS_N_TXTADDR(x,m) 0x2000
98 #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \
99 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \
100 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1))))
101 #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data)
102
103 #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec))
104 #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text)
105
106 /*
107 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package
108 *
109 * First, set of the various offsets/lengths in the exec package.
110 *
111 * Then, mark the text image busy (so it can be demand paged) or error
112 * out if this is not possible. Finally, set up vmcmds for the
113 * text, data, bss, and stack segments.
114 */
115 int
116 sunos_exec_aout_prep_zmagic(struct lwp *l, struct exec_package *epp)
117 {
118 struct exec *execp = epp->ep_hdr;
119 int error;
120
121 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC);
122 epp->ep_tsize = execp->a_text;
123 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC);
124 epp->ep_dsize = execp->a_data + execp->a_bss;
125 epp->ep_entry = execp->a_entry;
126
127 error = vn_marktext(epp->ep_vp);
128 if (error)
129 return (error);
130
131 /* set up command for text segment */
132 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
133 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC),
134 VM_PROT_READ|VM_PROT_EXECUTE);
135
136 /* set up command for data segment */
137 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
138 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC),
139 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
140
141 /* set up command for bss segment */
142 if (execp->a_bss)
143 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
144 epp->ep_daddr + execp->a_data, NULLVP, 0,
145 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
146
147 return (*epp->ep_esch->es_setup_stack)(l, epp);
148 }
149
150 /*
151 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package
152 */
153 int
154 sunos_exec_aout_prep_nmagic(struct lwp *l, struct exec_package *epp)
155 {
156 struct exec *execp = epp->ep_hdr;
157 long bsize, baddr;
158
159 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC);
160 epp->ep_tsize = execp->a_text;
161 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC);
162 epp->ep_dsize = execp->a_data + execp->a_bss;
163 epp->ep_entry = execp->a_entry;
164
165 /* set up command for text segment */
166 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
167 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC),
168 VM_PROT_READ|VM_PROT_EXECUTE);
169
170 /* set up command for data segment */
171 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
172 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC),
173 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
174
175 /* set up command for bss segment */
176 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
177 bsize = epp->ep_daddr + epp->ep_dsize - baddr;
178 if (bsize > 0)
179 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
180 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
181
182 return (*epp->ep_esch->es_setup_stack)(l, epp);
183 }
184
185 /*
186 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package
187 */
188 int
189 sunos_exec_aout_prep_omagic(struct lwp *l, struct exec_package *epp)
190 {
191 struct exec *execp = epp->ep_hdr;
192 long bsize, baddr;
193
194 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC);
195 epp->ep_tsize = execp->a_text;
196 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC);
197 epp->ep_dsize = execp->a_data + execp->a_bss;
198 epp->ep_entry = execp->a_entry;
199
200 /* set up command for text and data segments */
201 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
202 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
203 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
204
205 /* set up command for bss segment */
206 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
207 bsize = epp->ep_daddr + epp->ep_dsize - baddr;
208 if (bsize > 0)
209 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
210 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
211
212 return (*epp->ep_esch->es_setup_stack)(l, epp);
213 }
214 #endif /* !sparc */
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