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