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/string.h>
13 #include <linux/slab.h>
16 #include <asm/processor.h>
17 #include <asm/spitfire.h>
20 static void *module_map(unsigned long size)
22 struct vm_struct *area;
24 size = PAGE_ALIGN(size);
25 if (!size || size > MODULES_LEN)
28 area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
32 return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
35 static char *dot2underscore(char *name)
39 #endif /* CONFIG_SPARC64 */
41 void *module_alloc(unsigned long size)
45 /* We handle the zero case fine, unlike vmalloc */
49 ret = module_map(size);
51 ret = ERR_PTR(-ENOMEM);
58 /* Free memory returned from module_core_alloc/module_init_alloc */
59 void module_free(struct module *mod, void *module_region)
62 /* FIXME: If module_region == mod->init_region, trim exception
66 /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
67 int module_frob_arch_sections(Elf_Ehdr *hdr,
77 for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
78 if (symidx == hdr->e_shnum-1) {
79 printk("%s: no symtab found.\n", mod->name);
83 sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
84 strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
86 for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
87 if (sym[i].st_shndx == SHN_UNDEF) {
88 if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
89 sym[i].st_shndx = SHN_ABS;
91 char *name = strtab + sym[i].st_name;
99 int apply_relocate(Elf_Shdr *sechdrs,
101 unsigned int symindex,
105 printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n",
110 int apply_relocate_add(Elf_Shdr *sechdrs,
112 unsigned int symindex,
117 Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
122 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
125 /* This is where to make the change */
126 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
128 loc32 = (u32 *) location;
130 #ifdef CONFIG_SPARC64
131 BUG_ON(((u64)location >> (u64)32) != (u64)0);
132 #endif /* CONFIG_SPARC64 */
134 /* This is the symbol it is referring to. Note that all
135 undefined symbols have been resolved. */
136 sym = (Elf_Sym *)sechdrs[symindex].sh_addr
137 + ELF_R_SYM(rel[i].r_info);
138 v = sym->st_value + rel[i].r_addend;
140 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
141 #ifdef CONFIG_SPARC64
143 location[0] = v >> 56;
144 location[1] = v >> 48;
145 location[2] = v >> 40;
146 location[3] = v >> 32;
147 location[4] = v >> 24;
148 location[5] = v >> 16;
149 location[6] = v >> 8;
150 location[7] = v >> 0;
154 v -= (Elf_Addr) location;
158 case R_SPARC_WDISP19:
159 v -= (Elf_Addr) location;
160 *loc32 = (*loc32 & ~0x7ffff) |
161 ((v >> 2) & 0x7ffff);
165 *loc32 = (*loc32 & ~0x1fff) |
167 (ELF_R_TYPE(rel[i].r_info) >> 8))
170 #endif /* CONFIG_SPARC64 */
173 location[0] = v >> 24;
174 location[1] = v >> 16;
175 location[2] = v >> 8;
176 location[3] = v >> 0;
179 case R_SPARC_WDISP30:
180 v -= (Elf_Addr) location;
181 *loc32 = (*loc32 & ~0x3fffffff) |
182 ((v >> 2) & 0x3fffffff);
185 case R_SPARC_WDISP22:
186 v -= (Elf_Addr) location;
187 *loc32 = (*loc32 & ~0x3fffff) |
188 ((v >> 2) & 0x3fffff);
192 *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
196 *loc32 = (*loc32 & ~0x3fffff) |
197 ((v >> 10) & 0x3fffff);
201 printk(KERN_ERR "module %s: Unknown relocation: %x\n",
203 (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
210 #ifdef CONFIG_SPARC64
211 int module_finalize(const Elf_Ehdr *hdr,
212 const Elf_Shdr *sechdrs,
215 /* Cheetah's I-cache is fully coherent. */
216 if (tlb_type == spitfire) {
220 for (va = 0; va < (PAGE_SIZE << 1); va += 32)
221 spitfire_put_icache_tag(va, 0x0);
222 __asm__ __volatile__("flush %g6");
227 #endif /* CONFIG_SPARC64 */
229 void module_arch_cleanup(struct module *mod)