1 // SPDX-License-Identifier: GPL-2.0-or-later !! 1 // SPDX-License-Identifier: GPL-2.0
2 /* !! 2 /* Kernel module help for sparc64.
3 * OpenRISC module.c <<
4 * 3 *
5 * Linux architectural port borrowing liberall !! 4 * Copyright (C) 2001 Rusty Russell.
6 * others. All original copyrights apply as p !! 5 * Copyright (C) 2002 David S. Miller.
7 * declaration. <<
8 * <<
9 * Modifications for the OpenRISC architecture <<
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@s <<
11 */ 6 */
12 7
13 #include <linux/moduleloader.h> 8 #include <linux/moduleloader.h>
>> 9 #include <linux/kernel.h>
14 #include <linux/elf.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>
>> 16 #include <linux/mm.h>
>> 17
>> 18 #include <asm/processor.h>
>> 19 #include <asm/spitfire.h>
>> 20 #include <asm/cacheflush.h>
>> 21
>> 22 #include "entry.h"
>> 23
>> 24 /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
>> 25 int module_frob_arch_sections(Elf_Ehdr *hdr,
>> 26 Elf_Shdr *sechdrs,
>> 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;
15 43
16 int apply_relocate_add(Elf32_Shdr *sechdrs, !! 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,
17 const char *strtab, 54 const char *strtab,
18 unsigned int symindex, 55 unsigned int symindex,
19 unsigned int relsec, 56 unsigned int relsec,
20 struct module *me) 57 struct module *me)
21 { 58 {
22 unsigned int i; 59 unsigned int i;
23 Elf32_Rela *rel = (void *)sechdrs[rels !! 60 Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
24 Elf32_Sym *sym; !! 61 Elf_Sym *sym;
25 uint32_t *location; !! 62 u8 *location;
26 uint32_t value; !! 63 u32 *loc32;
27 64
28 pr_debug("Applying relocate section %u <<
29 sechdrs[relsec].sh_info); <<
30 for (i = 0; i < sechdrs[relsec].sh_siz 65 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
>> 66 Elf_Addr v;
>> 67
31 /* This is where to make the c 68 /* This is where to make the change */
32 location = (void *)sechdrs[sec !! 69 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
33 + rel[i].r_offset; 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 */
34 76
35 /* This is the symbol it is re 77 /* This is the symbol it is referring to. Note that all
36 undefined symbols have been 78 undefined symbols have been resolved. */
37 sym = (Elf32_Sym *)sechdrs[sym !! 79 sym = (Elf_Sym *)sechdrs[symindex].sh_addr
38 + ELF32_R_SYM(rel[i].r !! 80 + ELF_R_SYM(rel[i].r_info);
39 value = sym->st_value + rel[i] !! 81 v = sym->st_value + rel[i].r_addend;
40 !! 82
41 switch (ELF32_R_TYPE(rel[i].r_ !! 83 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
42 case R_OR1K_32: !! 84 case R_SPARC_DISP32:
43 *location = value; !! 85 v -= (Elf_Addr) location;
44 break; !! 86 *loc32 = v;
45 case R_OR1K_LO_16_IN_INSN: <<
46 *((uint16_t *)location <<
47 break; <<
48 case R_OR1K_HI_16_IN_INSN: <<
49 *((uint16_t *)location <<
50 break; <<
51 case R_OR1K_INSN_REL_26: <<
52 value -= (uint32_t)loc <<
53 value >>= 2; <<
54 value &= 0x03ffffff; <<
55 value |= *location & 0 <<
56 *location = value; <<
57 break; <<
58 case R_OR1K_AHI16: <<
59 /* Adjust the operand <<
60 value += 0x8000; <<
61 *((uint16_t *)location <<
62 break; <<
63 case R_OR1K_SLO16: <<
64 /* Split value lower 1 <<
65 value = ((value & 0xf8 <<
66 *location = (*location <<
67 break; 87 break;
68 default: !! 88 #ifdef CONFIG_SPARC64
69 pr_err("module %s: Unk !! 89 case R_SPARC_64:
70 me->name, ELF32 !! 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);
71 break; 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;
72 } 148 }
73 } 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;
>> 159
>> 160 for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
>> 161 if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
>> 162 sun4v_1insn = s;
>> 163 if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
>> 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 }
>> 175 }
>> 176
>> 177 int module_finalize(const Elf_Ehdr *hdr,
>> 178 const Elf_Shdr *sechdrs,
>> 179 struct module *me)
>> 180 {
>> 181 do_patch_sections(hdr, sechdrs);
>> 182
>> 183 /* Cheetah's I-cache is fully coherent. */
>> 184 if (tlb_type == spitfire) {
>> 185 unsigned long va;
>> 186
>> 187 flushw_all();
>> 188 for (va = 0; va < (PAGE_SIZE << 1); va += 32)
>> 189 spitfire_put_icache_tag(va, 0x0);
>> 190 __asm__ __volatile__("flush %g6");
>> 191 }
74 192
75 return 0; 193 return 0;
76 } 194 }
>> 195 #endif /* CONFIG_SPARC64 */
77 196
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