1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * Miscellaneous ISA-specific code.
29 */
30 #include <sys/types.h>
31 #include <sys/elf.h>
32 #include <sys/kobj.h>
33 #include <sys/kobj_impl.h>
34
35 /*
36 * Check that an ELF header corresponds to this machine's
37 * instruction set architecture. Used by kobj_load_module()
38 * to not get confused by a misplaced driver or kernel module
39 * built for a different ISA.
40 */
41 int
elf_mach_ok(Elf64_Ehdr * h)42 elf_mach_ok(Elf64_Ehdr *h)
43 {
44 return ((h->e_ident[EI_DATA] == ELFDATA2LSB) &&
45 (h->e_machine == EM_AMD64));
46 }
47
48 /*
49 * return non-zero for a bad address
50 */
51 int
kobj_addrcheck(void * xmp,caddr_t adr)52 kobj_addrcheck(void *xmp, caddr_t adr)
53 {
54 struct module *mp;
55
56 mp = (struct module *)xmp;
57
58 if ((adr >= mp->text && adr < mp->text + mp->text_size) ||
59 (adr >= mp->data && adr < mp->data + mp->data_size))
60 return (0); /* ok */
61 if (mp->bss && adr >= (caddr_t)mp->bss &&
62 adr < (caddr_t)mp->bss + mp->bss_size)
63 return (0);
64 return (1);
65 }
66
67
68 /*
69 * Flush instruction cache after updating text
70 * This is a nop for this machine arch.
71 */
72 /*ARGSUSED*/
73 void
kobj_sync_instruction_memory(caddr_t addr,size_t len)74 kobj_sync_instruction_memory(caddr_t addr, size_t len)
75 {}
76
77 /*
78 * Calculate memory image required for relocable object.
79 */
80 /* ARGSUSED3 */
81 int
get_progbits_size(struct module * mp,struct proginfo * tp,struct proginfo * dp,struct proginfo * sdp)82 get_progbits_size(struct module *mp, struct proginfo *tp, struct proginfo *dp,
83 struct proginfo *sdp)
84 {
85 struct proginfo *pp;
86 uint_t shn;
87 Shdr *shp;
88
89 /*
90 * loop through sections to find out how much space we need
91 * for text, data, (also bss that is already assigned)
92 */
93 for (shn = 1; shn < mp->hdr.e_shnum; shn++) {
94 shp = (Shdr *)(mp->shdrs + shn * mp->hdr.e_shentsize);
95 if (!(shp->sh_flags & SHF_ALLOC))
96 continue;
97 if (shp->sh_addr != 0) {
98 _kobj_printf(ops,
99 "%s non-zero sect addr in input file\n",
100 mp->filename);
101 return (-1);
102 }
103 pp = (shp->sh_flags & SHF_WRITE)? dp : tp;
104
105 if (shp->sh_addralign > pp->align)
106 pp->align = shp->sh_addralign;
107 pp->size = ALIGN(pp->size, shp->sh_addralign);
108 pp->size += ALIGN(shp->sh_size, 8);
109 }
110 tp->size = ALIGN(tp->size, 8);
111 dp->size = ALIGN(dp->size, 8);
112 return (0);
113 }
114