1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
/* Kernel module help for sparc64.
*
* Copyright (C) 2001 Rusty Russell.
* Copyright (C) 2002 David S. Miller.
*/
#include <linux/moduleloader.h>
#include <linux/kernel.h>
#include <linux/elf.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/gfp.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/mm.h>
#include <asm/processor.h>
#include <asm/spitfire.h>
#include <asm/cacheflush.h>
#include "entry.h"
#ifdef CONFIG_SPARC64
#include <linux/jump_label.h>
static void *module_map(unsigned long size)
{
if (PAGE_ALIGN(size) > MODULES_LEN)
return NULL;
return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
GFP_KERNEL, PAGE_KERNEL, -1,
__builtin_return_address(0));
}
static char *dot2underscore(char *name)
{
return name;
}
#else
static void *module_map(unsigned long size)
{
return vmalloc(size);
}
/* Replace references to .func with _Func */
static char *dot2underscore(char *name)
{
if (name[0] == '.') {
name[0] = '_';
name[1] = toupper(name[1]);
}
return name;
}
#endif /* CONFIG_SPARC64 */
void *module_alloc(unsigned long size)
{
void *ret;
/* We handle the zero case fine, unlike vmalloc */
if (size == 0)
return NULL;
ret = module_map(size);
if (!ret)
ret = ERR_PTR(-ENOMEM);
else
memset(ret, 0, size);
return ret;
}
/* Make generic code ignore STT_REGISTER dummy undefined symbols. */
int module_frob_arch_sections(Elf_Ehdr *hdr,
Elf_Shdr *sechdrs,
char *secstrings,
struct module *mod)
{
unsigned int symidx;
Elf_Sym *sym;
char *strtab;
int i;
for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
if (symidx == hdr->e_shnum-1) {
printk("%s: no symtab found.\n", mod->name);
return -ENOEXEC;
}
}
sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
if (sym[i].st_shndx == SHN_UNDEF) {
if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
sym[i].st_shndx = SHN_ABS;
} else {
char *name = strtab + sym[i].st_name;
dot2underscore(name);
}
}
}
return 0;
}
int apply_relocate_add(Elf_Shdr *sechdrs,
const char *strtab,
unsigned int symindex,
unsigned int relsec,
struct module *me)
{
unsigned int i;
Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
Elf_Sym *sym;
u8 *location;
u32 *loc32;
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
Elf_Addr v;
/* This is where to make the change */
location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ rel[i].r_offset;
loc32 = (u32 *) location;
#ifdef CONFIG_SPARC64
BUG_ON(((u64)location >> (u64)32) != (u64)0);
#endif /* CONFIG_SPARC64 */
/* This is the symbol it is referring to. Note that all
undefined symbols have been resolved. */
sym = (Elf_Sym *)sechdrs[symindex].sh_addr
+ ELF_R_SYM(rel[i].r_info);
v = sym->st_value + rel[i].r_addend;
switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
#ifdef CONFIG_SPARC64
case R_SPARC_64:
location[0] = v >> 56;
location[1] = v >> 48;
location[2] = v >> 40;
location[3] = v >> 32;
location[4] = v >> 24;
location[5] = v >> 16;
location[6] = v >> 8;
location[7] = v >> 0;
break;
case R_SPARC_DISP32:
v -= (Elf_Addr) location;
*loc32 = v;
break;
case R_SPARC_WDISP19:
v -= (Elf_Addr) location;
*loc32 = (*loc32 & ~0x7ffff) |
((v >> 2) & 0x7ffff);
break;
case R_SPARC_OLO10:
*loc32 = (*loc32 & ~0x1fff) |
(((v & 0x3ff) +
(ELF_R_TYPE(rel[i].r_info) >> 8))
& 0x1fff);
break;
#endif /* CONFIG_SPARC64 */
case R_SPARC_32:
case R_SPARC_UA32:
location[0] = v >> 24;
location[1] = v >> 16;
location[2] = v >> 8;
location[3] = v >> 0;
break;
case R_SPARC_WDISP30:
v -= (Elf_Addr) location;
*loc32 = (*loc32 & ~0x3fffffff) |
((v >> 2) & 0x3fffffff);
break;
case R_SPARC_WDISP22:
v -= (Elf_Addr) location;
*loc32 = (*loc32 & ~0x3fffff) |
((v >> 2) & 0x3fffff);
break;
case R_SPARC_LO10:
*loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
break;
case R_SPARC_HI22:
*loc32 = (*loc32 & ~0x3fffff) |
((v >> 10) & 0x3fffff);
break;
default:
printk(KERN_ERR "module %s: Unknown relocation: %x\n",
me->name,
(int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
return -ENOEXEC;
}
}
return 0;
}
#ifdef CONFIG_SPARC64
static void do_patch_sections(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs)
{
const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;
char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
sun4v_1insn = s;
if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
sun4v_2insn = s;
}
if (sun4v_1insn && tlb_type == hypervisor) {
void *p = (void *) sun4v_1insn->sh_addr;
sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size);
}
if (sun4v_2insn && tlb_type == hypervisor) {
void *p = (void *) sun4v_2insn->sh_addr;
sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size);
}
}
int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *me)
{
/* make jump label nops */
jump_label_apply_nops(me);
do_patch_sections(hdr, sechdrs);
/* Cheetah's I-cache is fully coherent. */
if (tlb_type == spitfire) {
unsigned long va;
flushw_all();
for (va = 0; va < (PAGE_SIZE << 1); va += 32)
spitfire_put_icache_tag(va, 0x0);
__asm__ __volatile__("flush %g6");
}
return 0;
}
#endif /* CONFIG_SPARC64 */
|
