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 void *module_map(unsigned long size)
40 #endif /* CONFIG_SPARC64 */
42 void *module_alloc(unsigned long size)
46 ret = module_map(size);
53 /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
54 int module_frob_arch_sections(Elf_Ehdr *hdr,
64 for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
65 if (symidx == hdr->e_shnum-1) {
66 printk("%s: no symtab found.\n", mod->name);
70 sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
71 strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
73 for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
74 if (sym[i].st_shndx == SHN_UNDEF) {
75 if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER)
76 sym[i].st_shndx = SHN_ABS;
82 int apply_relocate_add(Elf_Shdr *sechdrs,
84 unsigned int symindex,
89 Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
94 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
97 /* This is where to make the change */
98 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
100 loc32 = (u32 *) location;
102 #ifdef CONFIG_SPARC64
103 BUG_ON(((u64)location >> (u64)32) != (u64)0);
104 #endif /* CONFIG_SPARC64 */
106 /* This is the symbol it is referring to. Note that all
107 undefined symbols have been resolved. */
108 sym = (Elf_Sym *)sechdrs[symindex].sh_addr
109 + ELF_R_SYM(rel[i].r_info);
110 v = sym->st_value + rel[i].r_addend;
112 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
114 v -= (Elf_Addr) location;
117 #ifdef CONFIG_SPARC64
119 location[0] = v >> 56;
120 location[1] = v >> 48;
121 location[2] = v >> 40;
122 location[3] = v >> 32;
123 location[4] = v >> 24;
124 location[5] = v >> 16;
125 location[6] = v >> 8;
126 location[7] = v >> 0;
129 case R_SPARC_WDISP19:
130 v -= (Elf_Addr) location;
131 *loc32 = (*loc32 & ~0x7ffff) |
132 ((v >> 2) & 0x7ffff);
136 *loc32 = (*loc32 & ~0x1fff) |
138 (ELF_R_TYPE(rel[i].r_info) >> 8))
141 #endif /* CONFIG_SPARC64 */
145 location[0] = v >> 24;
146 location[1] = v >> 16;
147 location[2] = v >> 8;
148 location[3] = v >> 0;
151 case R_SPARC_WDISP30:
152 v -= (Elf_Addr) location;
153 *loc32 = (*loc32 & ~0x3fffffff) |
154 ((v >> 2) & 0x3fffffff);
157 case R_SPARC_WDISP22:
158 v -= (Elf_Addr) location;
159 *loc32 = (*loc32 & ~0x3fffff) |
160 ((v >> 2) & 0x3fffff);
164 *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
168 *loc32 = (*loc32 & ~0x3fffff) |
169 ((v >> 10) & 0x3fffff);
173 printk(KERN_ERR "module %s: Unknown relocation: %x\n",
175 (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
182 #ifdef CONFIG_SPARC64
183 static void do_patch_sections(const Elf_Ehdr *hdr,
184 const Elf_Shdr *sechdrs)
186 const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;
187 char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
189 for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
190 if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
192 if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
196 if (sun4v_1insn && tlb_type == hypervisor) {
197 void *p = (void *) sun4v_1insn->sh_addr;
198 sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size);
200 if (sun4v_2insn && tlb_type == hypervisor) {
201 void *p = (void *) sun4v_2insn->sh_addr;
202 sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size);
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 do_patch_sections(hdr, 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 */