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Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001// SPDX-License-Identifier: GPL-2.0-only
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
3 * linux/arch/arm/kernel/module.c
4 *
5 * Copyright (C) 2002 Russell King.
Hyok S. Choi6a570b22006-09-26 17:37:07 +09006 * Modified for nommu by Hyok S. Choi
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * Module allocation method suggested by Andi Kleen.
9 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/module.h>
Russell Kingf339ab32005-10-28 14:29:43 +010011#include <linux/moduleloader.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/kernel.h>
Andrea Righi27ac7922008-07-23 21:28:13 -070013#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/elf.h>
15#include <linux/vmalloc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/fs.h>
17#include <linux/string.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090018#include <linux/gfp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
Russell King37efe642008-12-01 11:53:07 +000020#include <asm/sections.h>
Russell King4a9cb362011-02-10 15:25:18 +000021#include <asm/smp_plat.h>
Catalin Marinas2e1926e2009-02-11 13:09:54 +010022#include <asm/unwind.h>
Ben Dooksf592d322013-07-19 18:27:23 +010023#include <asm/opcodes.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
25#ifdef CONFIG_XIP_KERNEL
26/*
27 * The XIP kernel text is mapped in the module area for modules and
28 * some other stuff to work without any indirect relocations.
Russell Kingab4f2ee2008-11-06 17:11:07 +000029 * MODULES_VADDR is redefined here and not in asm/memory.h to avoid
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 * recompiling the whole kernel when CONFIG_XIP_KERNEL is turned on/off.
31 */
Russell Kingab4f2ee2008-11-06 17:11:07 +000032#undef MODULES_VADDR
Chris Brandt02afa9a2016-02-09 19:34:43 +010033#define MODULES_VADDR (((unsigned long)_exiprom + ~PMD_MASK) & PMD_MASK)
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#endif
35
Hyok S. Choi6a570b22006-09-26 17:37:07 +090036#ifdef CONFIG_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -070037void *module_alloc(unsigned long size)
38{
Florian Fainelli75d24d92017-04-27 11:19:01 -070039 gfp_t gfp_mask = GFP_KERNEL;
40 void *p;
41
42 /* Silence the initial allocation */
43 if (IS_ENABLED(CONFIG_ARM_MODULE_PLTS))
44 gfp_mask |= __GFP_NOWARN;
45
46 p = __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
47 gfp_mask, PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE,
Ard Biesheuvel7d485f62014-11-24 16:54:35 +010048 __builtin_return_address(0));
49 if (!IS_ENABLED(CONFIG_ARM_MODULE_PLTS) || p)
50 return p;
51 return __vmalloc_node_range(size, 1, VMALLOC_START, VMALLOC_END,
Andrey Ryabinincb9e3c22015-02-13 14:40:07 -080052 GFP_KERNEL, PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE,
David Rientjesd0a21262011-01-13 15:46:02 -080053 __builtin_return_address(0));
Linus Torvalds1da177e2005-04-16 15:20:36 -070054}
Jonas Bonn66574cc2011-06-30 21:22:12 +020055#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Vincent Whitchurchcdcb07e2020-05-14 11:36:42 +010057bool module_init_section(const char *name)
58{
59 return strstarts(name, ".init") ||
60 strstarts(name, ".ARM.extab.init") ||
61 strstarts(name, ".ARM.exidx.init");
62}
63
Matthias Schiffer70bac082019-06-07 12:49:12 +020064bool module_exit_section(const char *name)
65{
66 return strstarts(name, ".exit") ||
67 strstarts(name, ".ARM.extab.exit") ||
68 strstarts(name, ".ARM.exidx.exit");
69}
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071int
72apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
73 unsigned int relindex, struct module *module)
74{
75 Elf32_Shdr *symsec = sechdrs + symindex;
76 Elf32_Shdr *relsec = sechdrs + relindex;
77 Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
78 Elf32_Rel *rel = (void *)relsec->sh_addr;
79 unsigned int i;
80
81 for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
82 unsigned long loc;
83 Elf32_Sym *sym;
Russell King68e6fad2011-01-11 19:57:14 +000084 const char *symname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 s32 offset;
Ben Dooksf592d322013-07-19 18:27:23 +010086 u32 tmp;
Catalin Marinasb7493152010-06-21 15:11:38 +010087#ifdef CONFIG_THUMB2_KERNEL
Catalin Marinasadca6dc2009-07-24 12:32:59 +010088 u32 upper, lower, sign, j1, j2;
Catalin Marinasb7493152010-06-21 15:11:38 +010089#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91 offset = ELF32_R_SYM(rel->r_info);
92 if (offset < 0 || offset > (symsec->sh_size / sizeof(Elf32_Sym))) {
Russell King68e6fad2011-01-11 19:57:14 +000093 pr_err("%s: section %u reloc %u: bad relocation sym offset\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 module->name, relindex, i);
95 return -ENOEXEC;
96 }
97
98 sym = ((Elf32_Sym *)symsec->sh_addr) + offset;
Russell King68e6fad2011-01-11 19:57:14 +000099 symname = strtab + sym->st_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101 if (rel->r_offset < 0 || rel->r_offset > dstsec->sh_size - sizeof(u32)) {
Russell King68e6fad2011-01-11 19:57:14 +0000102 pr_err("%s: section %u reloc %u sym '%s': out of bounds relocation, offset %d size %u\n",
103 module->name, relindex, i, symname,
104 rel->r_offset, dstsec->sh_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 return -ENOEXEC;
106 }
107
108 loc = dstsec->sh_addr + rel->r_offset;
109
110 switch (ELF32_R_TYPE(rel->r_info)) {
Catalin Marinas2e1926e2009-02-11 13:09:54 +0100111 case R_ARM_NONE:
112 /* ignore */
113 break;
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 case R_ARM_ABS32:
Andrey Ryabinin55f0fb62014-08-08 14:12:17 +0100116 case R_ARM_TARGET1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 *(u32 *)loc += sym->st_value;
118 break;
119
120 case R_ARM_PC24:
Daniel Jacobowitzc2e26112005-12-14 22:04:22 +0000121 case R_ARM_CALL:
122 case R_ARM_JUMP24:
Ard Biesheuvel2b8514d2014-11-24 16:45:12 +0100123 if (sym->st_value & 3) {
124 pr_err("%s: section %u reloc %u sym '%s': unsupported interworking call (ARM -> Thumb)\n",
125 module->name, relindex, i, symname);
126 return -ENOEXEC;
127 }
128
Ben Dooksf592d322013-07-19 18:27:23 +0100129 offset = __mem_to_opcode_arm(*(u32 *)loc);
130 offset = (offset & 0x00ffffff) << 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 if (offset & 0x02000000)
132 offset -= 0x04000000;
133
134 offset += sym->st_value - loc;
Ard Biesheuvel7d485f62014-11-24 16:54:35 +0100135
136 /*
137 * Route through a PLT entry if 'offset' exceeds the
138 * supported range. Note that 'offset + loc + 8'
139 * contains the absolute jump target, i.e.,
140 * @sym + addend, corrected for the +8 PC bias.
141 */
142 if (IS_ENABLED(CONFIG_ARM_MODULE_PLTS) &&
143 (offset <= (s32)0xfe000000 ||
144 offset >= (s32)0x02000000))
145 offset = get_module_plt(module, loc,
146 offset + loc + 8)
147 - loc - 8;
148
Ard Biesheuvel2b8514d2014-11-24 16:45:12 +0100149 if (offset <= (s32)0xfe000000 ||
Kevin Weltonc5f12502007-05-08 22:05:25 +0100150 offset >= (s32)0x02000000) {
Russell King68e6fad2011-01-11 19:57:14 +0000151 pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n",
152 module->name, relindex, i, symname,
153 ELF32_R_TYPE(rel->r_info), loc,
154 sym->st_value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 return -ENOEXEC;
156 }
157
158 offset >>= 2;
Ben Dooksf592d322013-07-19 18:27:23 +0100159 offset &= 0x00ffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Ben Dooksf592d322013-07-19 18:27:23 +0100161 *(u32 *)loc &= __opcode_to_mem_arm(0xff000000);
162 *(u32 *)loc |= __opcode_to_mem_arm(offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 break;
164
Daniel Silverstone4731f8b2009-03-20 11:11:43 +0100165 case R_ARM_V4BX:
166 /* Preserve Rm and the condition code. Alter
167 * other bits to re-code instruction as
168 * MOV PC,Rm.
169 */
Ben Dooksf592d322013-07-19 18:27:23 +0100170 *(u32 *)loc &= __opcode_to_mem_arm(0xf000000f);
171 *(u32 *)loc |= __opcode_to_mem_arm(0x01a0f000);
Daniel Silverstone4731f8b2009-03-20 11:11:43 +0100172 break;
173
Catalin Marinas2e1926e2009-02-11 13:09:54 +0100174 case R_ARM_PREL31:
Ard Biesheuvel050d18d2017-01-30 18:29:28 +0100175 offset = (*(s32 *)loc << 1) >> 1; /* sign extend */
176 offset += sym->st_value - loc;
177 if (offset >= 0x40000000 || offset < -0x40000000) {
178 pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n",
179 module->name, relindex, i, symname,
180 ELF32_R_TYPE(rel->r_info), loc,
181 sym->st_value);
182 return -ENOEXEC;
183 }
184 *(u32 *)loc &= 0x80000000;
185 *(u32 *)loc |= offset & 0x7fffffff;
Catalin Marinas2e1926e2009-02-11 13:09:54 +0100186 break;
187
Ard Biesheuvel22f2d232020-09-14 11:24:37 +0300188 case R_ARM_REL32:
189 *(u32 *)loc += sym->st_value - loc;
190 break;
191
Paul Gortmakerae51e6092009-05-07 16:18:40 +0100192 case R_ARM_MOVW_ABS_NC:
193 case R_ARM_MOVT_ABS:
Ard Biesheuvel22f2d232020-09-14 11:24:37 +0300194 case R_ARM_MOVW_PREL_NC:
195 case R_ARM_MOVT_PREL:
Ben Dooksf592d322013-07-19 18:27:23 +0100196 offset = tmp = __mem_to_opcode_arm(*(u32 *)loc);
Paul Gortmakerae51e6092009-05-07 16:18:40 +0100197 offset = ((offset & 0xf0000) >> 4) | (offset & 0xfff);
198 offset = (offset ^ 0x8000) - 0x8000;
199
200 offset += sym->st_value;
Ard Biesheuvel22f2d232020-09-14 11:24:37 +0300201 if (ELF32_R_TYPE(rel->r_info) == R_ARM_MOVT_PREL ||
202 ELF32_R_TYPE(rel->r_info) == R_ARM_MOVW_PREL_NC)
203 offset -= loc;
204 if (ELF32_R_TYPE(rel->r_info) == R_ARM_MOVT_ABS ||
205 ELF32_R_TYPE(rel->r_info) == R_ARM_MOVT_PREL)
Paul Gortmakerae51e6092009-05-07 16:18:40 +0100206 offset >>= 16;
207
Ben Dooksf592d322013-07-19 18:27:23 +0100208 tmp &= 0xfff0f000;
209 tmp |= ((offset & 0xf000) << 4) |
210 (offset & 0x0fff);
211
212 *(u32 *)loc = __opcode_to_mem_arm(tmp);
Paul Gortmakerae51e6092009-05-07 16:18:40 +0100213 break;
214
Catalin Marinasb7493152010-06-21 15:11:38 +0100215#ifdef CONFIG_THUMB2_KERNEL
Catalin Marinasadca6dc2009-07-24 12:32:59 +0100216 case R_ARM_THM_CALL:
217 case R_ARM_THM_JUMP24:
Ard Biesheuvel2b8514d2014-11-24 16:45:12 +0100218 /*
219 * For function symbols, only Thumb addresses are
220 * allowed (no interworking).
221 *
222 * For non-function symbols, the destination
223 * has no specific ARM/Thumb disposition, so
224 * the branch is resolved under the assumption
225 * that interworking is not required.
226 */
227 if (ELF32_ST_TYPE(sym->st_info) == STT_FUNC &&
228 !(sym->st_value & 1)) {
229 pr_err("%s: section %u reloc %u sym '%s': unsupported interworking call (Thumb -> ARM)\n",
230 module->name, relindex, i, symname);
231 return -ENOEXEC;
232 }
233
Ben Dooksf592d322013-07-19 18:27:23 +0100234 upper = __mem_to_opcode_thumb16(*(u16 *)loc);
235 lower = __mem_to_opcode_thumb16(*(u16 *)(loc + 2));
Catalin Marinasadca6dc2009-07-24 12:32:59 +0100236
237 /*
238 * 25 bit signed address range (Thumb-2 BL and B.W
239 * instructions):
240 * S:I1:I2:imm10:imm11:0
241 * where:
242 * S = upper[10] = offset[24]
243 * I1 = ~(J1 ^ S) = offset[23]
244 * I2 = ~(J2 ^ S) = offset[22]
245 * imm10 = upper[9:0] = offset[21:12]
246 * imm11 = lower[10:0] = offset[11:1]
247 * J1 = lower[13]
248 * J2 = lower[11]
249 */
250 sign = (upper >> 10) & 1;
251 j1 = (lower >> 13) & 1;
252 j2 = (lower >> 11) & 1;
253 offset = (sign << 24) | ((~(j1 ^ sign) & 1) << 23) |
254 ((~(j2 ^ sign) & 1) << 22) |
255 ((upper & 0x03ff) << 12) |
256 ((lower & 0x07ff) << 1);
257 if (offset & 0x01000000)
258 offset -= 0x02000000;
259 offset += sym->st_value - loc;
260
Ard Biesheuvel7d485f62014-11-24 16:54:35 +0100261 /*
262 * Route through a PLT entry if 'offset' exceeds the
263 * supported range.
264 */
265 if (IS_ENABLED(CONFIG_ARM_MODULE_PLTS) &&
266 (offset <= (s32)0xff000000 ||
267 offset >= (s32)0x01000000))
268 offset = get_module_plt(module, loc,
269 offset + loc + 4)
270 - loc - 4;
271
Ard Biesheuvel2b8514d2014-11-24 16:45:12 +0100272 if (offset <= (s32)0xff000000 ||
Catalin Marinasadca6dc2009-07-24 12:32:59 +0100273 offset >= (s32)0x01000000) {
Russell King68e6fad2011-01-11 19:57:14 +0000274 pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n",
275 module->name, relindex, i, symname,
276 ELF32_R_TYPE(rel->r_info), loc,
277 sym->st_value);
Catalin Marinasadca6dc2009-07-24 12:32:59 +0100278 return -ENOEXEC;
279 }
280
281 sign = (offset >> 24) & 1;
282 j1 = sign ^ (~(offset >> 23) & 1);
283 j2 = sign ^ (~(offset >> 22) & 1);
Ben Dooksf592d322013-07-19 18:27:23 +0100284 upper = (u16)((upper & 0xf800) | (sign << 10) |
Catalin Marinasadca6dc2009-07-24 12:32:59 +0100285 ((offset >> 12) & 0x03ff));
Ben Dooksf592d322013-07-19 18:27:23 +0100286 lower = (u16)((lower & 0xd000) |
287 (j1 << 13) | (j2 << 11) |
288 ((offset >> 1) & 0x07ff));
289
290 *(u16 *)loc = __opcode_to_mem_thumb16(upper);
291 *(u16 *)(loc + 2) = __opcode_to_mem_thumb16(lower);
Catalin Marinasadca6dc2009-07-24 12:32:59 +0100292 break;
293
Catalin Marinas8dd47742010-06-21 15:10:37 +0100294 case R_ARM_THM_MOVW_ABS_NC:
295 case R_ARM_THM_MOVT_ABS:
Ard Biesheuvel22f2d232020-09-14 11:24:37 +0300296 case R_ARM_THM_MOVW_PREL_NC:
297 case R_ARM_THM_MOVT_PREL:
Ben Dooksf592d322013-07-19 18:27:23 +0100298 upper = __mem_to_opcode_thumb16(*(u16 *)loc);
299 lower = __mem_to_opcode_thumb16(*(u16 *)(loc + 2));
Catalin Marinas8dd47742010-06-21 15:10:37 +0100300
301 /*
302 * MOVT/MOVW instructions encoding in Thumb-2:
303 *
304 * i = upper[10]
305 * imm4 = upper[3:0]
306 * imm3 = lower[14:12]
307 * imm8 = lower[7:0]
308 *
309 * imm16 = imm4:i:imm3:imm8
310 */
311 offset = ((upper & 0x000f) << 12) |
312 ((upper & 0x0400) << 1) |
313 ((lower & 0x7000) >> 4) | (lower & 0x00ff);
314 offset = (offset ^ 0x8000) - 0x8000;
315 offset += sym->st_value;
316
Ard Biesheuvel22f2d232020-09-14 11:24:37 +0300317 if (ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVT_PREL ||
318 ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVW_PREL_NC)
319 offset -= loc;
320 if (ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVT_ABS ||
321 ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVT_PREL)
Catalin Marinas8dd47742010-06-21 15:10:37 +0100322 offset >>= 16;
323
Ben Dooksf592d322013-07-19 18:27:23 +0100324 upper = (u16)((upper & 0xfbf0) |
325 ((offset & 0xf000) >> 12) |
326 ((offset & 0x0800) >> 1));
327 lower = (u16)((lower & 0x8f00) |
328 ((offset & 0x0700) << 4) |
329 (offset & 0x00ff));
330 *(u16 *)loc = __opcode_to_mem_thumb16(upper);
331 *(u16 *)(loc + 2) = __opcode_to_mem_thumb16(lower);
Catalin Marinas8dd47742010-06-21 15:10:37 +0100332 break;
Catalin Marinasb7493152010-06-21 15:11:38 +0100333#endif
Catalin Marinas8dd47742010-06-21 15:10:37 +0100334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 default:
Russell King4ed89f22282014-10-28 11:26:42 +0000336 pr_err("%s: unknown relocation: %u\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 module->name, ELF32_R_TYPE(rel->r_info));
338 return -ENOEXEC;
339 }
340 }
341 return 0;
342}
343
Russell King89313602010-11-12 13:02:46 +0000344struct mod_unwind_map {
345 const Elf_Shdr *unw_sec;
346 const Elf_Shdr *txt_sec;
347};
348
Russell King4a9cb362011-02-10 15:25:18 +0000349static const Elf_Shdr *find_mod_section(const Elf32_Ehdr *hdr,
350 const Elf_Shdr *sechdrs, const char *name)
351{
352 const Elf_Shdr *s, *se;
353 const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
354
355 for (s = sechdrs, se = sechdrs + hdr->e_shnum; s < se; s++)
356 if (strcmp(name, secstrs + s->sh_name) == 0)
357 return s;
358
359 return NULL;
360}
361
Russell Kingdc21af92011-01-04 19:09:43 +0000362extern void fixup_pv_table(const void *, unsigned long);
Russell King4a9cb362011-02-10 15:25:18 +0000363extern void fixup_smp(const void *, unsigned long);
364
Russell King89313602010-11-12 13:02:46 +0000365int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
366 struct module *mod)
367{
Russell Kingdc21af92011-01-04 19:09:43 +0000368 const Elf_Shdr *s = NULL;
Catalin Marinas2e1926e2009-02-11 13:09:54 +0100369#ifdef CONFIG_ARM_UNWIND
Russell King89313602010-11-12 13:02:46 +0000370 const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
Russell King4a9cb362011-02-10 15:25:18 +0000371 const Elf_Shdr *sechdrs_end = sechdrs + hdr->e_shnum;
Russell King89313602010-11-12 13:02:46 +0000372 struct mod_unwind_map maps[ARM_SEC_MAX];
Phil Carmodye5f77722010-08-19 15:16:37 +0100373 int i;
Russell King89313602010-11-12 13:02:46 +0000374
375 memset(maps, 0, sizeof(maps));
376
377 for (s = sechdrs; s < sechdrs_end; s++) {
378 const char *secname = secstrs + s->sh_name;
379
Russell King50005a82010-11-12 13:04:16 +0000380 if (!(s->sh_flags & SHF_ALLOC))
381 continue;
382
Russell King89313602010-11-12 13:02:46 +0000383 if (strcmp(".ARM.exidx.init.text", secname) == 0)
384 maps[ARM_SEC_INIT].unw_sec = s;
Russell King89313602010-11-12 13:02:46 +0000385 else if (strcmp(".ARM.exidx", secname) == 0)
386 maps[ARM_SEC_CORE].unw_sec = s;
387 else if (strcmp(".ARM.exidx.exit.text", secname) == 0)
388 maps[ARM_SEC_EXIT].unw_sec = s;
Douglas Anderson849b8822013-08-29 00:08:01 +0100389 else if (strcmp(".ARM.exidx.text.unlikely", secname) == 0)
390 maps[ARM_SEC_UNLIKELY].unw_sec = s;
391 else if (strcmp(".ARM.exidx.text.hot", secname) == 0)
392 maps[ARM_SEC_HOT].unw_sec = s;
Russell King89313602010-11-12 13:02:46 +0000393 else if (strcmp(".init.text", secname) == 0)
394 maps[ARM_SEC_INIT].txt_sec = s;
Russell King89313602010-11-12 13:02:46 +0000395 else if (strcmp(".text", secname) == 0)
396 maps[ARM_SEC_CORE].txt_sec = s;
397 else if (strcmp(".exit.text", secname) == 0)
398 maps[ARM_SEC_EXIT].txt_sec = s;
Douglas Anderson849b8822013-08-29 00:08:01 +0100399 else if (strcmp(".text.unlikely", secname) == 0)
400 maps[ARM_SEC_UNLIKELY].txt_sec = s;
401 else if (strcmp(".text.hot", secname) == 0)
402 maps[ARM_SEC_HOT].txt_sec = s;
Phil Carmodye5f77722010-08-19 15:16:37 +0100403 }
Catalin Marinas2e1926e2009-02-11 13:09:54 +0100404
Russell King89313602010-11-12 13:02:46 +0000405 for (i = 0; i < ARM_SEC_MAX; i++)
406 if (maps[i].unw_sec && maps[i].txt_sec)
407 mod->arch.unwind[i] =
408 unwind_table_add(maps[i].unw_sec->sh_addr,
409 maps[i].unw_sec->sh_size,
410 maps[i].txt_sec->sh_addr,
411 maps[i].txt_sec->sh_size);
Catalin Marinas2e1926e2009-02-11 13:09:54 +0100412#endif
Russell Kingdc21af92011-01-04 19:09:43 +0000413#ifdef CONFIG_ARM_PATCH_PHYS_VIRT
414 s = find_mod_section(hdr, sechdrs, ".pv_table");
415 if (s)
416 fixup_pv_table((void *)s->sh_addr, s->sh_size);
417#endif
Russell King4a9cb362011-02-10 15:25:18 +0000418 s = find_mod_section(hdr, sechdrs, ".alt.smp.init");
419 if (s && !is_smp())
Russell King20feaab2011-08-04 00:01:00 +0100420#ifdef CONFIG_SMP_ON_UP
Russell King4a9cb362011-02-10 15:25:18 +0000421 fixup_smp((void *)s->sh_addr, s->sh_size);
Russell King20feaab2011-08-04 00:01:00 +0100422#else
423 return -EINVAL;
424#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 return 0;
426}
427
428void
429module_arch_cleanup(struct module *mod)
430{
Russell King89313602010-11-12 13:02:46 +0000431#ifdef CONFIG_ARM_UNWIND
432 int i;
433
Vincent Whitchurchcdcb07e2020-05-14 11:36:42 +0100434 for (i = 0; i < ARM_SEC_MAX; i++) {
435 unwind_table_del(mod->arch.unwind[i]);
436 mod->arch.unwind[i] = NULL;
437 }
438#endif
439}
440
441void __weak module_arch_freeing_init(struct module *mod)
442{
443#ifdef CONFIG_ARM_UNWIND
444 unwind_table_del(mod->arch.unwind[ARM_SEC_INIT]);
445 mod->arch.unwind[ARM_SEC_INIT] = NULL;
Russell King89313602010-11-12 13:02:46 +0000446#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447}