1 /* Kernel module help for sparc64.
3 * Copyright (C) 2001 Rusty Russell.
4 * Copyright (C) 2002 David S. Miller.
7 #include <linux/moduleloader.h>
8 #include <linux/kernel.h>
10 #include <linux/vmalloc.h>
12 #include <linux/gfp.h>
13 #include <linux/string.h>
14 #include <linux/ctype.h>
17 #include <asm/processor.h>
18 #include <asm/spitfire.h>
19 #include <asm/cacheflush.h>
25 #include <linux/jump_label.h>
27 static void *module_map(unsigned long size)
29 if (PAGE_ALIGN(size) > MODULES_LEN)
31 return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
32 GFP_KERNEL, PAGE_KERNEL, -1,
33 __builtin_return_address(0));
36 static char *dot2underscore(char *name)
41 static void *module_map(unsigned long size)
46 /* Replace references to .func with _Func */
47 static char *dot2underscore(char *name)
51 name[1] = toupper(name[1]);
55 #endif /* CONFIG_SPARC64 */
57 void *module_alloc(unsigned long size)
61 /* We handle the zero case fine, unlike vmalloc */
65 ret = module_map(size);
67 ret = ERR_PTR(-ENOMEM);
74 /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
75 int module_frob_arch_sections(Elf_Ehdr *hdr,
85 for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
86 if (symidx == hdr->e_shnum-1) {
87 printk("%s: no symtab found.\n", mod->name);
91 sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
92 strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
94 for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
95 if (sym[i].st_shndx == SHN_UNDEF) {
96 if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
97 sym[i].st_shndx = SHN_ABS;
99 char *name = strtab + sym[i].st_name;
100 dot2underscore(name);
107 int apply_relocate_add(Elf_Shdr *sechdrs,
109 unsigned int symindex,
114 Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
119 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
122 /* This is where to make the change */
123 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
125 loc32 = (u32 *) location;
127 #ifdef CONFIG_SPARC64
128 BUG_ON(((u64)location >> (u64)32) != (u64)0);
129 #endif /* CONFIG_SPARC64 */
131 /* This is the symbol it is referring to. Note that all
132 undefined symbols have been resolved. */
133 sym = (Elf_Sym *)sechdrs[symindex].sh_addr
134 + ELF_R_SYM(rel[i].r_info);
135 v = sym->st_value + rel[i].r_addend;
137 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
138 #ifdef CONFIG_SPARC64
140 location[0] = v >> 56;
141 location[1] = v >> 48;
142 location[2] = v >> 40;
143 location[3] = v >> 32;
144 location[4] = v >> 24;
145 location[5] = v >> 16;
146 location[6] = v >> 8;
147 location[7] = v >> 0;
151 v -= (Elf_Addr) location;
155 case R_SPARC_WDISP19:
156 v -= (Elf_Addr) location;
157 *loc32 = (*loc32 & ~0x7ffff) |
158 ((v >> 2) & 0x7ffff);
162 *loc32 = (*loc32 & ~0x1fff) |
164 (ELF_R_TYPE(rel[i].r_info) >> 8))
167 #endif /* CONFIG_SPARC64 */
171 location[0] = v >> 24;
172 location[1] = v >> 16;
173 location[2] = v >> 8;
174 location[3] = v >> 0;
177 case R_SPARC_WDISP30:
178 v -= (Elf_Addr) location;
179 *loc32 = (*loc32 & ~0x3fffffff) |
180 ((v >> 2) & 0x3fffffff);
183 case R_SPARC_WDISP22:
184 v -= (Elf_Addr) location;
185 *loc32 = (*loc32 & ~0x3fffff) |
186 ((v >> 2) & 0x3fffff);
190 *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
194 *loc32 = (*loc32 & ~0x3fffff) |
195 ((v >> 10) & 0x3fffff);
199 printk(KERN_ERR "module %s: Unknown relocation: %x\n",
201 (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
208 #ifdef CONFIG_SPARC64
209 static void do_patch_sections(const Elf_Ehdr *hdr,
210 const Elf_Shdr *sechdrs)
212 const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;
213 char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
215 for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
216 if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
218 if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
222 if (sun4v_1insn && tlb_type == hypervisor) {
223 void *p = (void *) sun4v_1insn->sh_addr;
224 sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size);
226 if (sun4v_2insn && tlb_type == hypervisor) {
227 void *p = (void *) sun4v_2insn->sh_addr;
228 sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size);
232 int module_finalize(const Elf_Ehdr *hdr,
233 const Elf_Shdr *sechdrs,
236 /* make jump label nops */
237 jump_label_apply_nops(me);
239 do_patch_sections(hdr, sechdrs);
241 /* Cheetah's I-cache is fully coherent. */
242 if (tlb_type == spitfire) {
246 for (va = 0; va < (PAGE_SIZE << 1); va += 32)
247 spitfire_put_icache_tag(va, 0x0);
248 __asm__ __volatile__("flush %g6");
253 #endif /* CONFIG_SPARC64 */