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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* Kernel module help for sparc64. |
3 | * | |
4 | * Copyright (C) 2001 Rusty Russell. | |
5 | * Copyright (C) 2002 David S. Miller. | |
6 | */ | |
7 | ||
8 | #include <linux/moduleloader.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/elf.h> | |
11 | #include <linux/vmalloc.h> | |
12 | #include <linux/fs.h> | |
5a0e3ad6 | 13 | #include <linux/gfp.h> |
1da177e4 | 14 | #include <linux/string.h> |
e6b04fe0 | 15 | #include <linux/ctype.h> |
1da177e4 LT |
16 | #include <linux/mm.h> |
17 | ||
18 | #include <asm/processor.h> | |
19 | #include <asm/spitfire.h> | |
d550bbd4 | 20 | #include <asm/cacheflush.h> |
1da177e4 | 21 | |
0b64120c DM |
22 | #include "entry.h" |
23 | ||
627bf2f6 | 24 | #ifdef CONFIG_SPARC64 |
dff9d3c2 DM |
25 | |
26 | #include <linux/jump_label.h> | |
27 | ||
1da177e4 LT |
28 | static void *module_map(unsigned long size) |
29 | { | |
d0a21265 | 30 | if (PAGE_ALIGN(size) > MODULES_LEN) |
1da177e4 | 31 | return NULL; |
d0a21265 | 32 | return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, |
cb9e3c29 | 33 | GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE, |
d0a21265 | 34 | __builtin_return_address(0)); |
1da177e4 | 35 | } |
e6b04fe0 SR |
36 | #else |
37 | static void *module_map(unsigned long size) | |
38 | { | |
39 | return vmalloc(size); | |
40 | } | |
627bf2f6 SR |
41 | #endif /* CONFIG_SPARC64 */ |
42 | ||
1da177e4 LT |
43 | void *module_alloc(unsigned long size) |
44 | { | |
45 | void *ret; | |
46 | ||
1da177e4 | 47 | ret = module_map(size); |
a9e8d1a6 | 48 | if (ret) |
1da177e4 LT |
49 | memset(ret, 0, size); |
50 | ||
51 | return ret; | |
52 | } | |
53 | ||
1da177e4 LT |
54 | /* Make generic code ignore STT_REGISTER dummy undefined symbols. */ |
55 | int module_frob_arch_sections(Elf_Ehdr *hdr, | |
56 | Elf_Shdr *sechdrs, | |
57 | char *secstrings, | |
58 | struct module *mod) | |
59 | { | |
60 | unsigned int symidx; | |
c45d1c20 | 61 | Elf_Sym *sym; |
627bf2f6 | 62 | char *strtab; |
1da177e4 LT |
63 | int i; |
64 | ||
65 | for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) { | |
66 | if (symidx == hdr->e_shnum-1) { | |
67 | printk("%s: no symtab found.\n", mod->name); | |
68 | return -ENOEXEC; | |
69 | } | |
70 | } | |
c45d1c20 | 71 | sym = (Elf_Sym *)sechdrs[symidx].sh_addr; |
1da177e4 LT |
72 | strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr; |
73 | ||
74 | for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) { | |
627bf2f6 | 75 | if (sym[i].st_shndx == SHN_UNDEF) { |
1b35a57b | 76 | if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) |
627bf2f6 | 77 | sym[i].st_shndx = SHN_ABS; |
627bf2f6 | 78 | } |
1da177e4 LT |
79 | } |
80 | return 0; | |
81 | } | |
82 | ||
c45d1c20 | 83 | int apply_relocate_add(Elf_Shdr *sechdrs, |
1da177e4 LT |
84 | const char *strtab, |
85 | unsigned int symindex, | |
86 | unsigned int relsec, | |
87 | struct module *me) | |
88 | { | |
89 | unsigned int i; | |
c45d1c20 SR |
90 | Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr; |
91 | Elf_Sym *sym; | |
1da177e4 LT |
92 | u8 *location; |
93 | u32 *loc32; | |
94 | ||
95 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | |
c45d1c20 | 96 | Elf_Addr v; |
1da177e4 LT |
97 | |
98 | /* This is where to make the change */ | |
99 | location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
100 | + rel[i].r_offset; | |
101 | loc32 = (u32 *) location; | |
102 | ||
627bf2f6 | 103 | #ifdef CONFIG_SPARC64 |
1da177e4 | 104 | BUG_ON(((u64)location >> (u64)32) != (u64)0); |
627bf2f6 | 105 | #endif /* CONFIG_SPARC64 */ |
1da177e4 LT |
106 | |
107 | /* This is the symbol it is referring to. Note that all | |
108 | undefined symbols have been resolved. */ | |
c45d1c20 SR |
109 | sym = (Elf_Sym *)sechdrs[symindex].sh_addr |
110 | + ELF_R_SYM(rel[i].r_info); | |
1da177e4 LT |
111 | v = sym->st_value + rel[i].r_addend; |
112 | ||
c45d1c20 | 113 | switch (ELF_R_TYPE(rel[i].r_info) & 0xff) { |
dfa520af AL |
114 | case R_SPARC_DISP32: |
115 | v -= (Elf_Addr) location; | |
116 | *loc32 = v; | |
117 | break; | |
627bf2f6 | 118 | #ifdef CONFIG_SPARC64 |
1da177e4 LT |
119 | case R_SPARC_64: |
120 | location[0] = v >> 56; | |
121 | location[1] = v >> 48; | |
122 | location[2] = v >> 40; | |
123 | location[3] = v >> 32; | |
124 | location[4] = v >> 24; | |
125 | location[5] = v >> 16; | |
126 | location[6] = v >> 8; | |
127 | location[7] = v >> 0; | |
128 | break; | |
129 | ||
627bf2f6 SR |
130 | case R_SPARC_WDISP19: |
131 | v -= (Elf_Addr) location; | |
132 | *loc32 = (*loc32 & ~0x7ffff) | | |
133 | ((v >> 2) & 0x7ffff); | |
134 | break; | |
135 | ||
136 | case R_SPARC_OLO10: | |
137 | *loc32 = (*loc32 & ~0x1fff) | | |
138 | (((v & 0x3ff) + | |
139 | (ELF_R_TYPE(rel[i].r_info) >> 8)) | |
140 | & 0x1fff); | |
141 | break; | |
142 | #endif /* CONFIG_SPARC64 */ | |
143 | ||
1da177e4 | 144 | case R_SPARC_32: |
e6b04fe0 | 145 | case R_SPARC_UA32: |
1da177e4 LT |
146 | location[0] = v >> 24; |
147 | location[1] = v >> 16; | |
148 | location[2] = v >> 8; | |
149 | location[3] = v >> 0; | |
150 | break; | |
151 | ||
152 | case R_SPARC_WDISP30: | |
c45d1c20 | 153 | v -= (Elf_Addr) location; |
1da177e4 LT |
154 | *loc32 = (*loc32 & ~0x3fffffff) | |
155 | ((v >> 2) & 0x3fffffff); | |
156 | break; | |
157 | ||
158 | case R_SPARC_WDISP22: | |
c45d1c20 | 159 | v -= (Elf_Addr) location; |
1da177e4 LT |
160 | *loc32 = (*loc32 & ~0x3fffff) | |
161 | ((v >> 2) & 0x3fffff); | |
162 | break; | |
163 | ||
1da177e4 LT |
164 | case R_SPARC_LO10: |
165 | *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff); | |
166 | break; | |
167 | ||
168 | case R_SPARC_HI22: | |
169 | *loc32 = (*loc32 & ~0x3fffff) | | |
170 | ((v >> 10) & 0x3fffff); | |
171 | break; | |
172 | ||
1da177e4 LT |
173 | default: |
174 | printk(KERN_ERR "module %s: Unknown relocation: %x\n", | |
175 | me->name, | |
c45d1c20 | 176 | (int) (ELF_R_TYPE(rel[i].r_info) & 0xff)); |
1da177e4 | 177 | return -ENOEXEC; |
6cb79b3f | 178 | } |
1da177e4 LT |
179 | } |
180 | return 0; | |
181 | } | |
182 | ||
627bf2f6 | 183 | #ifdef CONFIG_SPARC64 |
0b64120c DM |
184 | static void do_patch_sections(const Elf_Ehdr *hdr, |
185 | const Elf_Shdr *sechdrs) | |
186 | { | |
187 | const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL; | |
188 | char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; | |
189 | ||
190 | for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { | |
191 | if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name)) | |
192 | sun4v_1insn = s; | |
193 | if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name)) | |
194 | sun4v_2insn = s; | |
195 | } | |
196 | ||
197 | if (sun4v_1insn && tlb_type == hypervisor) { | |
198 | void *p = (void *) sun4v_1insn->sh_addr; | |
199 | sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size); | |
200 | } | |
201 | if (sun4v_2insn && tlb_type == hypervisor) { | |
202 | void *p = (void *) sun4v_2insn->sh_addr; | |
203 | sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size); | |
204 | } | |
205 | } | |
206 | ||
1da177e4 LT |
207 | int module_finalize(const Elf_Ehdr *hdr, |
208 | const Elf_Shdr *sechdrs, | |
209 | struct module *me) | |
210 | { | |
dff9d3c2 DM |
211 | /* make jump label nops */ |
212 | jump_label_apply_nops(me); | |
213 | ||
0b64120c DM |
214 | do_patch_sections(hdr, sechdrs); |
215 | ||
1da177e4 LT |
216 | /* Cheetah's I-cache is fully coherent. */ |
217 | if (tlb_type == spitfire) { | |
218 | unsigned long va; | |
219 | ||
220 | flushw_all(); | |
221 | for (va = 0; va < (PAGE_SIZE << 1); va += 32) | |
222 | spitfire_put_icache_tag(va, 0x0); | |
223 | __asm__ __volatile__("flush %g6"); | |
224 | } | |
225 | ||
226 | return 0; | |
227 | } | |
627bf2f6 | 228 | #endif /* CONFIG_SPARC64 */ |