1 // SPDX-License-Identifier: GPL-2.0-or-later !! 1 /* Kernel module help for sparc64.
2 /* Kernel module help for powerpc. !! 2 *
3 Copyright (C) 2001, 2003 Rusty Russell IBM !! 3 * Copyright (C) 2001 Rusty Russell.
4 Copyright (C) 2008 Freescale Semiconductor !! 4 * Copyright (C) 2002 David S. Miller.
>> 5 */
5 6
6 */ <<
7 #include <linux/elf.h> <<
8 #include <linux/moduleloader.h> 7 #include <linux/moduleloader.h>
9 #include <linux/err.h> !! 8 #include <linux/kernel.h>
>> 9 #include <linux/elf.h>
>> 10 #include <linux/vmalloc.h>
>> 11 #include <linux/fs.h>
>> 12 #include <linux/gfp.h>
>> 13 #include <linux/string.h>
>> 14 #include <linux/ctype.h>
10 #include <linux/mm.h> 15 #include <linux/mm.h>
11 #include <linux/bug.h> !! 16
12 #include <asm/module.h> !! 17 #include <asm/processor.h>
13 #include <linux/uaccess.h> !! 18 #include <asm/spitfire.h>
14 #include <asm/firmware.h> !! 19 #include <asm/cacheflush.h>
15 #include <linux/sort.h> !! 20
16 #include <asm/setup.h> !! 21 #include "entry.h"
17 #include <asm/sections.h> !! 22
18 !! 23 #ifdef CONFIG_SPARC64
19 static const Elf_Shdr *find_section(const Elf_ !! 24
20 const Elf_ !! 25 #include <linux/jump_label.h>
21 const char !! 26
>> 27 static void *module_map(unsigned long size)
>> 28 {
>> 29 if (PAGE_ALIGN(size) > MODULES_LEN)
>> 30 return NULL;
>> 31 return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
>> 32 GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE,
>> 33 __builtin_return_address(0));
>> 34 }
>> 35 #else
>> 36 static void *module_map(unsigned long size)
>> 37 {
>> 38 return vmalloc(size);
>> 39 }
>> 40 #endif /* CONFIG_SPARC64 */
>> 41
>> 42 void *module_alloc(unsigned long size)
>> 43 {
>> 44 void *ret;
>> 45
>> 46 ret = module_map(size);
>> 47 if (ret)
>> 48 memset(ret, 0, size);
>> 49
>> 50 return ret;
>> 51 }
>> 52
>> 53 /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
>> 54 int module_frob_arch_sections(Elf_Ehdr *hdr,
>> 55 Elf_Shdr *sechdrs,
>> 56 char *secstrings,
>> 57 struct module *mod)
>> 58 {
>> 59 unsigned int symidx;
>> 60 Elf_Sym *sym;
>> 61 char *strtab;
>> 62 int i;
>> 63
>> 64 for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
>> 65 if (symidx == hdr->e_shnum-1) {
>> 66 printk("%s: no symtab found.\n", mod->name);
>> 67 return -ENOEXEC;
>> 68 }
>> 69 }
>> 70 sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
>> 71 strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
>> 72
>> 73 for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
>> 74 if (sym[i].st_shndx == SHN_UNDEF) {
>> 75 if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER)
>> 76 sym[i].st_shndx = SHN_ABS;
>> 77 }
>> 78 }
>> 79 return 0;
>> 80 }
>> 81
>> 82 int apply_relocate_add(Elf_Shdr *sechdrs,
>> 83 const char *strtab,
>> 84 unsigned int symindex,
>> 85 unsigned int relsec,
>> 86 struct module *me)
22 { 87 {
23 char *secstrings; <<
24 unsigned int i; 88 unsigned int i;
>> 89 Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
>> 90 Elf_Sym *sym;
>> 91 u8 *location;
>> 92 u32 *loc32;
>> 93
>> 94 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
>> 95 Elf_Addr v;
>> 96
>> 97 /* This is where to make the change */
>> 98 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
>> 99 + rel[i].r_offset;
>> 100 loc32 = (u32 *) location;
>> 101
>> 102 #ifdef CONFIG_SPARC64
>> 103 BUG_ON(((u64)location >> (u64)32) != (u64)0);
>> 104 #endif /* CONFIG_SPARC64 */
>> 105
>> 106 /* This is the symbol it is referring to. Note that all
>> 107 undefined symbols have been resolved. */
>> 108 sym = (Elf_Sym *)sechdrs[symindex].sh_addr
>> 109 + ELF_R_SYM(rel[i].r_info);
>> 110 v = sym->st_value + rel[i].r_addend;
>> 111
>> 112 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
>> 113 case R_SPARC_DISP32:
>> 114 v -= (Elf_Addr) location;
>> 115 *loc32 = v;
>> 116 break;
>> 117 #ifdef CONFIG_SPARC64
>> 118 case R_SPARC_64:
>> 119 location[0] = v >> 56;
>> 120 location[1] = v >> 48;
>> 121 location[2] = v >> 40;
>> 122 location[3] = v >> 32;
>> 123 location[4] = v >> 24;
>> 124 location[5] = v >> 16;
>> 125 location[6] = v >> 8;
>> 126 location[7] = v >> 0;
>> 127 break;
>> 128
>> 129 case R_SPARC_WDISP19:
>> 130 v -= (Elf_Addr) location;
>> 131 *loc32 = (*loc32 & ~0x7ffff) |
>> 132 ((v >> 2) & 0x7ffff);
>> 133 break;
>> 134
>> 135 case R_SPARC_OLO10:
>> 136 *loc32 = (*loc32 & ~0x1fff) |
>> 137 (((v & 0x3ff) +
>> 138 (ELF_R_TYPE(rel[i].r_info) >> 8))
>> 139 & 0x1fff);
>> 140 break;
>> 141 #endif /* CONFIG_SPARC64 */
>> 142
>> 143 case R_SPARC_32:
>> 144 case R_SPARC_UA32:
>> 145 location[0] = v >> 24;
>> 146 location[1] = v >> 16;
>> 147 location[2] = v >> 8;
>> 148 location[3] = v >> 0;
>> 149 break;
>> 150
>> 151 case R_SPARC_WDISP30:
>> 152 v -= (Elf_Addr) location;
>> 153 *loc32 = (*loc32 & ~0x3fffffff) |
>> 154 ((v >> 2) & 0x3fffffff);
>> 155 break;
>> 156
>> 157 case R_SPARC_WDISP22:
>> 158 v -= (Elf_Addr) location;
>> 159 *loc32 = (*loc32 & ~0x3fffff) |
>> 160 ((v >> 2) & 0x3fffff);
>> 161 break;
>> 162
>> 163 case R_SPARC_LO10:
>> 164 *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
>> 165 break;
>> 166
>> 167 case R_SPARC_HI22:
>> 168 *loc32 = (*loc32 & ~0x3fffff) |
>> 169 ((v >> 10) & 0x3fffff);
>> 170 break;
>> 171
>> 172 default:
>> 173 printk(KERN_ERR "module %s: Unknown relocation: %x\n",
>> 174 me->name,
>> 175 (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
>> 176 return -ENOEXEC;
>> 177 }
>> 178 }
>> 179 return 0;
>> 180 }
25 181
26 secstrings = (char *)hdr + sechdrs[hdr !! 182 #ifdef CONFIG_SPARC64
27 for (i = 1; i < hdr->e_shnum; i++) !! 183 static void do_patch_sections(const Elf_Ehdr *hdr,
28 if (strcmp(secstrings+sechdrs[ !! 184 const Elf_Shdr *sechdrs)
29 return &sechdrs[i]; !! 185 {
30 return NULL; !! 186 const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;
>> 187 char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
>> 188
>> 189 for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
>> 190 if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
>> 191 sun4v_1insn = s;
>> 192 if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
>> 193 sun4v_2insn = s;
>> 194 }
>> 195
>> 196 if (sun4v_1insn && tlb_type == hypervisor) {
>> 197 void *p = (void *) sun4v_1insn->sh_addr;
>> 198 sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size);
>> 199 }
>> 200 if (sun4v_2insn && tlb_type == hypervisor) {
>> 201 void *p = (void *) sun4v_2insn->sh_addr;
>> 202 sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size);
>> 203 }
31 } 204 }
32 205
33 int module_finalize(const Elf_Ehdr *hdr, 206 int module_finalize(const Elf_Ehdr *hdr,
34 const Elf_Shdr *sechdrs, struc !! 207 const Elf_Shdr *sechdrs,
>> 208 struct module *me)
35 { 209 {
36 const Elf_Shdr *sect; !! 210 /* make jump label nops */
37 int rc; !! 211 jump_label_apply_nops(me);
38 212
39 rc = module_finalize_ftrace(me, sechdr !! 213 do_patch_sections(hdr, sechdrs);
40 if (rc) !! 214
41 return rc; !! 215 /* Cheetah's I-cache is fully coherent. */
42 !! 216 if (tlb_type == spitfire) {
43 /* Apply feature fixups */ !! 217 unsigned long va;
44 sect = find_section(hdr, sechdrs, "__f !! 218
45 if (sect != NULL) !! 219 flushw_all();
46 do_feature_fixups(cur_cpu_spec !! 220 for (va = 0; va < (PAGE_SIZE << 1); va += 32)
47 (void *)sect !! 221 spitfire_put_icache_tag(va, 0x0);
48 (void *)sect !! 222 __asm__ __volatile__("flush %g6");
49 !! 223 }
50 sect = find_section(hdr, sechdrs, "__m <<
51 if (sect != NULL) <<
52 do_feature_fixups(cur_cpu_spec <<
53 (void *)sect <<
54 (void *)sect <<
55 <<
56 #ifdef CONFIG_PPC64 <<
57 sect = find_section(hdr, sechdrs, "__f <<
58 if (sect != NULL) <<
59 do_feature_fixups(powerpc_firm <<
60 (void *)sect <<
61 (void *)sect <<
62 #endif /* CONFIG_PPC64 */ <<
63 <<
64 #ifdef CONFIG_PPC64_ELF_ABI_V1 <<
65 sect = find_section(hdr, sechdrs, ".op <<
66 if (sect != NULL) { <<
67 me->arch.start_opd = sect->sh_ <<
68 me->arch.end_opd = sect->sh_ad <<
69 } <<
70 #endif /* CONFIG_PPC64_ELF_ABI_V1 */ <<
71 <<
72 #ifdef CONFIG_PPC_BARRIER_NOSPEC <<
73 sect = find_section(hdr, sechdrs, "__s <<
74 if (sect != NULL) <<
75 do_barrier_nospec_fixups_range <<
76 (void *)sect <<
77 (void *)sect <<
78 #endif /* CONFIG_PPC_BARRIER_NOSPEC */ <<
79 <<
80 sect = find_section(hdr, sechdrs, "__l <<
81 if (sect != NULL) <<
82 do_lwsync_fixups(cur_cpu_spec- <<
83 (void *)sect- <<
84 (void *)sect- <<
85 224
86 return 0; 225 return 0;
87 } 226 }
>> 227 #endif /* CONFIG_SPARC64 */
88 228
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