1 // SPDX-License-Identifier: GPL-2.0
2 /* Kernel module help for sparc64.
4 * Copyright (C) 2001 Rusty Russell.
5 * Copyright (C) 2002 David S. Miller.
8 #include <linux/moduleloader.h>
9 #include <linux/kernel.h>
10 #include <linux/elf.h>
11 #include <linux/vmalloc.h>
13 #include <linux/gfp.h>
14 #include <linux/string.h>
15 #include <linux/ctype.h>
18 #include <asm/processor.h>
19 #include <asm/spitfire.h>
20 #include <asm/cacheflush.h>
24 /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
25 int module_frob_arch_sections(Elf_Ehdr *hdr,
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);
41 sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
42 strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
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;
53 int apply_relocate_add(Elf_Shdr *sechdrs,
55 unsigned int symindex,
60 Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
65 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
68 /* This is where to make the change */
69 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
71 loc32 = (u32 *) location;
74 BUG_ON(((u64)location >> (u64)32) != (u64)0);
75 #endif /* CONFIG_SPARC64 */
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;
83 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
85 v -= (Elf_Addr) location;
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;
100 case R_SPARC_WDISP19:
101 v -= (Elf_Addr) location;
102 *loc32 = (*loc32 & ~0x7ffff) |
103 ((v >> 2) & 0x7ffff);
107 *loc32 = (*loc32 & ~0x1fff) |
109 (ELF_R_TYPE(rel[i].r_info) >> 8))
112 #endif /* CONFIG_SPARC64 */
116 location[0] = v >> 24;
117 location[1] = v >> 16;
118 location[2] = v >> 8;
119 location[3] = v >> 0;
122 case R_SPARC_WDISP30:
123 v -= (Elf_Addr) location;
124 *loc32 = (*loc32 & ~0x3fffffff) |
125 ((v >> 2) & 0x3fffffff);
128 case R_SPARC_WDISP22:
129 v -= (Elf_Addr) location;
130 *loc32 = (*loc32 & ~0x3fffff) |
131 ((v >> 2) & 0x3fffff);
135 *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
139 *loc32 = (*loc32 & ~0x3fffff) |
140 ((v >> 10) & 0x3fffff);
144 printk(KERN_ERR "module %s: Unknown relocation: %x\n",
146 (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
153 #ifdef CONFIG_SPARC64
154 static void do_patch_sections(const Elf_Ehdr *hdr,
155 const Elf_Shdr *sechdrs)
157 const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;
158 char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
160 for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
161 if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
163 if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
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);
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);
177 int module_finalize(const Elf_Ehdr *hdr,
178 const Elf_Shdr *sechdrs,
181 do_patch_sections(hdr, sechdrs);
183 /* Cheetah's I-cache is fully coherent. */
184 if (tlb_type == spitfire) {
188 for (va = 0; va < (PAGE_SIZE << 1); va += 32)
189 spitfire_put_icache_tag(va, 0x0);
190 __asm__ __volatile__("flush %g6");
195 #endif /* CONFIG_SPARC64 */