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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh64/kernel/module.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sh64/kernel/module.c')
-rw-r--r--arch/sh64/kernel/module.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/arch/sh64/kernel/module.c b/arch/sh64/kernel/module.c
new file mode 100644
index 000000000000..2598f6b88b44
--- /dev/null
+++ b/arch/sh64/kernel/module.c
@@ -0,0 +1,161 @@
1/* Kernel module help for sh64.
2
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License as published by
5 the Free Software Foundation; either version 2 of the License, or
6 (at your option) any later version.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16
17 Copyright 2004 SuperH (UK) Ltd
18 Author: Richard Curnow
19
20 Based on the sh version, and on code from the sh64-specific parts of
21 modutils, originally written by Richard Curnow and Ben Gaster.
22
23*/
24#include <linux/moduleloader.h>
25#include <linux/elf.h>
26#include <linux/vmalloc.h>
27#include <linux/fs.h>
28#include <linux/string.h>
29#include <linux/kernel.h>
30
31#if 0
32#define DEBUGP printk
33#else
34#define DEBUGP(fmt...)
35#endif
36
37void *module_alloc(unsigned long size)
38{
39 if (size == 0)
40 return NULL;
41 return vmalloc(size);
42}
43
44
45/* Free memory returned from module_alloc */
46void module_free(struct module *mod, void *module_region)
47{
48 vfree(module_region);
49 /* FIXME: If module_region == mod->init_region, trim exception
50 table entries. */
51}
52
53/* We don't need anything special. */
54int module_frob_arch_sections(Elf_Ehdr *hdr,
55 Elf_Shdr *sechdrs,
56 char *secstrings,
57 struct module *mod)
58{
59 return 0;
60}
61
62int apply_relocate_add(Elf32_Shdr *sechdrs,
63 const char *strtab,
64 unsigned int symindex,
65 unsigned int relsec,
66 struct module *me)
67{
68 unsigned int i;
69 Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
70 Elf32_Sym *sym;
71 Elf32_Addr relocation;
72 uint32_t *location;
73 int align;
74 int is_shmedia;
75
76 DEBUGP("Applying relocate section %u to %u\n", relsec,
77 sechdrs[relsec].sh_info);
78 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
79 /* This is where to make the change */
80 location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
81 + rel[i].r_offset;
82 /* This is the symbol it is referring to. Note that all
83 undefined symbols have been resolved. */
84 sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
85 + ELF32_R_SYM(rel[i].r_info);
86 relocation = sym->st_value + rel[i].r_addend;
87 align = (int)location & 3;
88
89 /* For text addresses, bit2 of the st_other field indicates
90 * whether the symbol is SHmedia (1) or SHcompact (0). If
91 * SHmedia, the LSB of the symbol needs to be asserted
92 * for the CPU to be in SHmedia mode when it starts executing
93 * the branch target. */
94 is_shmedia = (sym->st_other & 4) ? 1 : 0;
95 if (is_shmedia) {
96 relocation |= 1;
97 }
98
99 switch (ELF32_R_TYPE(rel[i].r_info)) {
100 case R_SH_DIR32:
101 DEBUGP("R_SH_DIR32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
102 *location += relocation;
103 break;
104 case R_SH_REL32:
105 DEBUGP("R_SH_REL32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
106 relocation -= (Elf32_Addr) location;
107 *location += relocation;
108 break;
109 case R_SH_IMM_LOW16:
110 DEBUGP("R_SH_IMM_LOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
111 *location = (*location & ~0x3fffc00) |
112 ((relocation & 0xffff) << 10);
113 break;
114 case R_SH_IMM_MEDLOW16:
115 DEBUGP("R_SH_IMM_MEDLOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
116 *location = (*location & ~0x3fffc00) |
117 (((relocation >> 16) & 0xffff) << 10);
118 break;
119 case R_SH_IMM_LOW16_PCREL:
120 DEBUGP("R_SH_IMM_LOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
121 relocation -= (Elf32_Addr) location;
122 *location = (*location & ~0x3fffc00) |
123 ((relocation & 0xffff) << 10);
124 break;
125 case R_SH_IMM_MEDLOW16_PCREL:
126 DEBUGP("R_SH_IMM_MEDLOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
127 relocation -= (Elf32_Addr) location;
128 *location = (*location & ~0x3fffc00) |
129 (((relocation >> 16) & 0xffff) << 10);
130 break;
131 default:
132 printk(KERN_ERR "module %s: Unknown relocation: %u\n",
133 me->name, ELF32_R_TYPE(rel[i].r_info));
134 return -ENOEXEC;
135 }
136 }
137 return 0;
138}
139
140int apply_relocate(Elf32_Shdr *sechdrs,
141 const char *strtab,
142 unsigned int symindex,
143 unsigned int relsec,
144 struct module *me)
145{
146 printk(KERN_ERR "module %s: REL RELOCATION unsupported\n",
147 me->name);
148 return -ENOEXEC;
149}
150
151int module_finalize(const Elf_Ehdr *hdr,
152 const Elf_Shdr *sechdrs,
153 struct module *me)
154{
155 return 0;
156}
157
158void module_arch_cleanup(struct module *mod)
159{
160}
161
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