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>
24 #include <linux/jump_label.h>
26 static void *module_map(unsigned long size)
28 if (PAGE_ALIGN(size) > MODULES_LEN)
30 return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
31 GFP_KERNEL, PAGE_KERNEL, -1,
32 __builtin_return_address(0));
35 static char *dot2underscore(char *name)
40 static void *module_map(unsigned long size)
45 /* Replace references to .func with _Func */
46 static char *dot2underscore(char *name)
50 name[1] = toupper(name[1]);
54 #endif /* CONFIG_SPARC64 */
56 void *module_alloc(unsigned long size)
60 /* We handle the zero case fine, unlike vmalloc */
64 ret = module_map(size);
66 ret = ERR_PTR(-ENOMEM);
73 /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
74 int module_frob_arch_sections(Elf_Ehdr *hdr,
84 for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
85 if (symidx == hdr->e_shnum-1) {
86 printk("%s: no symtab found.\n", mod->name);
90 sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
91 strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
93 for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
94 if (sym[i].st_shndx == SHN_UNDEF) {
95 if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
96 sym[i].st_shndx = SHN_ABS;
98 char *name = strtab + sym[i].st_name;
106 int apply_relocate_add(Elf_Shdr *sechdrs,
108 unsigned int symindex,
113 Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
118 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
121 /* This is where to make the change */
122 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
124 loc32 = (u32 *) location;
126 #ifdef CONFIG_SPARC64
127 BUG_ON(((u64)location >> (u64)32) != (u64)0);
128 #endif /* CONFIG_SPARC64 */
130 /* This is the symbol it is referring to. Note that all
131 undefined symbols have been resolved. */
132 sym = (Elf_Sym *)sechdrs[symindex].sh_addr
133 + ELF_R_SYM(rel[i].r_info);
134 v = sym->st_value + rel[i].r_addend;
136 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
137 #ifdef CONFIG_SPARC64
139 location[0] = v >> 56;
140 location[1] = v >> 48;
141 location[2] = v >> 40;
142 location[3] = v >> 32;
143 location[4] = v >> 24;
144 location[5] = v >> 16;
145 location[6] = v >> 8;
146 location[7] = v >> 0;
150 v -= (Elf_Addr) location;
154 case R_SPARC_WDISP19:
155 v -= (Elf_Addr) location;
156 *loc32 = (*loc32 & ~0x7ffff) |
157 ((v >> 2) & 0x7ffff);
161 *loc32 = (*loc32 & ~0x1fff) |
163 (ELF_R_TYPE(rel[i].r_info) >> 8))
166 #endif /* CONFIG_SPARC64 */
170 location[0] = v >> 24;
171 location[1] = v >> 16;
172 location[2] = v >> 8;
173 location[3] = v >> 0;
176 case R_SPARC_WDISP30:
177 v -= (Elf_Addr) location;
178 *loc32 = (*loc32 & ~0x3fffffff) |
179 ((v >> 2) & 0x3fffffff);
182 case R_SPARC_WDISP22:
183 v -= (Elf_Addr) location;
184 *loc32 = (*loc32 & ~0x3fffff) |
185 ((v >> 2) & 0x3fffff);
189 *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
193 *loc32 = (*loc32 & ~0x3fffff) |
194 ((v >> 10) & 0x3fffff);
198 printk(KERN_ERR "module %s: Unknown relocation: %x\n",
200 (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
207 #ifdef CONFIG_SPARC64
208 static void do_patch_sections(const Elf_Ehdr *hdr,
209 const Elf_Shdr *sechdrs)
211 const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;
212 char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
214 for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
215 if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
217 if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
221 if (sun4v_1insn && tlb_type == hypervisor) {
222 void *p = (void *) sun4v_1insn->sh_addr;
223 sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size);
225 if (sun4v_2insn && tlb_type == hypervisor) {
226 void *p = (void *) sun4v_2insn->sh_addr;
227 sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size);
231 int module_finalize(const Elf_Ehdr *hdr,
232 const Elf_Shdr *sechdrs,
235 /* make jump label nops */
236 jump_label_apply_nops(me);
238 do_patch_sections(hdr, sechdrs);
240 /* Cheetah's I-cache is fully coherent. */
241 if (tlb_type == spitfire) {
245 for (va = 0; va < (PAGE_SIZE << 1); va += 32)
246 spitfire_put_icache_tag(va, 0x0);
247 __asm__ __volatile__("flush %g6");
252 #endif /* CONFIG_SPARC64 */