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>
22 #include <linux/jump_label.h>
24 static void *module_map(unsigned long size)
26 if (PAGE_ALIGN(size) > MODULES_LEN)
28 return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
29 GFP_KERNEL, PAGE_KERNEL, -1,
30 __builtin_return_address(0));
33 static char *dot2underscore(char *name)
38 static void *module_map(unsigned long size)
43 /* Replace references to .func with _Func */
44 static char *dot2underscore(char *name)
48 name[1] = toupper(name[1]);
52 #endif /* CONFIG_SPARC64 */
54 void *module_alloc(unsigned long size)
58 /* We handle the zero case fine, unlike vmalloc */
62 ret = module_map(size);
64 ret = ERR_PTR(-ENOMEM);
71 /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
72 int module_frob_arch_sections(Elf_Ehdr *hdr,
82 for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
83 if (symidx == hdr->e_shnum-1) {
84 printk("%s: no symtab found.\n", mod->name);
88 sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
89 strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
91 for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
92 if (sym[i].st_shndx == SHN_UNDEF) {
93 if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
94 sym[i].st_shndx = SHN_ABS;
96 char *name = strtab + sym[i].st_name;
104 int apply_relocate_add(Elf_Shdr *sechdrs,
106 unsigned int symindex,
111 Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
116 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
119 /* This is where to make the change */
120 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
122 loc32 = (u32 *) location;
124 #ifdef CONFIG_SPARC64
125 BUG_ON(((u64)location >> (u64)32) != (u64)0);
126 #endif /* CONFIG_SPARC64 */
128 /* This is the symbol it is referring to. Note that all
129 undefined symbols have been resolved. */
130 sym = (Elf_Sym *)sechdrs[symindex].sh_addr
131 + ELF_R_SYM(rel[i].r_info);
132 v = sym->st_value + rel[i].r_addend;
134 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
135 #ifdef CONFIG_SPARC64
137 location[0] = v >> 56;
138 location[1] = v >> 48;
139 location[2] = v >> 40;
140 location[3] = v >> 32;
141 location[4] = v >> 24;
142 location[5] = v >> 16;
143 location[6] = v >> 8;
144 location[7] = v >> 0;
148 v -= (Elf_Addr) location;
152 case R_SPARC_WDISP19:
153 v -= (Elf_Addr) location;
154 *loc32 = (*loc32 & ~0x7ffff) |
155 ((v >> 2) & 0x7ffff);
159 *loc32 = (*loc32 & ~0x1fff) |
161 (ELF_R_TYPE(rel[i].r_info) >> 8))
164 #endif /* CONFIG_SPARC64 */
168 location[0] = v >> 24;
169 location[1] = v >> 16;
170 location[2] = v >> 8;
171 location[3] = v >> 0;
174 case R_SPARC_WDISP30:
175 v -= (Elf_Addr) location;
176 *loc32 = (*loc32 & ~0x3fffffff) |
177 ((v >> 2) & 0x3fffffff);
180 case R_SPARC_WDISP22:
181 v -= (Elf_Addr) location;
182 *loc32 = (*loc32 & ~0x3fffff) |
183 ((v >> 2) & 0x3fffff);
187 *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
191 *loc32 = (*loc32 & ~0x3fffff) |
192 ((v >> 10) & 0x3fffff);
196 printk(KERN_ERR "module %s: Unknown relocation: %x\n",
198 (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
205 #ifdef CONFIG_SPARC64
206 int module_finalize(const Elf_Ehdr *hdr,
207 const Elf_Shdr *sechdrs,
210 /* make jump label nops */
211 jump_label_apply_nops(me);
213 /* Cheetah's I-cache is fully coherent. */
214 if (tlb_type == spitfire) {
218 for (va = 0; va < (PAGE_SIZE << 1); va += 32)
219 spitfire_put_icache_tag(va, 0x0);
220 __asm__ __volatile__("flush %g6");
225 #endif /* CONFIG_SPARC64 */