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 /* We handle the zero case fine, unlike vmalloc */
50 ret = module_map(size);
57 /* Make generic code ignore STT_REGISTER dummy undefined symbols. */
58 int module_frob_arch_sections(Elf_Ehdr *hdr,
68 for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
69 if (symidx == hdr->e_shnum-1) {
70 printk("%s: no symtab found.\n", mod->name);
74 sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
75 strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
77 for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
78 if (sym[i].st_shndx == SHN_UNDEF) {
79 if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER)
80 sym[i].st_shndx = SHN_ABS;
86 int apply_relocate_add(Elf_Shdr *sechdrs,
88 unsigned int symindex,
93 Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
98 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
101 /* This is where to make the change */
102 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
104 loc32 = (u32 *) location;
106 #ifdef CONFIG_SPARC64
107 BUG_ON(((u64)location >> (u64)32) != (u64)0);
108 #endif /* CONFIG_SPARC64 */
110 /* This is the symbol it is referring to. Note that all
111 undefined symbols have been resolved. */
112 sym = (Elf_Sym *)sechdrs[symindex].sh_addr
113 + ELF_R_SYM(rel[i].r_info);
114 v = sym->st_value + rel[i].r_addend;
116 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
118 v -= (Elf_Addr) location;
121 #ifdef CONFIG_SPARC64
123 location[0] = v >> 56;
124 location[1] = v >> 48;
125 location[2] = v >> 40;
126 location[3] = v >> 32;
127 location[4] = v >> 24;
128 location[5] = v >> 16;
129 location[6] = v >> 8;
130 location[7] = v >> 0;
133 case R_SPARC_WDISP19:
134 v -= (Elf_Addr) location;
135 *loc32 = (*loc32 & ~0x7ffff) |
136 ((v >> 2) & 0x7ffff);
140 *loc32 = (*loc32 & ~0x1fff) |
142 (ELF_R_TYPE(rel[i].r_info) >> 8))
145 #endif /* CONFIG_SPARC64 */
149 location[0] = v >> 24;
150 location[1] = v >> 16;
151 location[2] = v >> 8;
152 location[3] = v >> 0;
155 case R_SPARC_WDISP30:
156 v -= (Elf_Addr) location;
157 *loc32 = (*loc32 & ~0x3fffffff) |
158 ((v >> 2) & 0x3fffffff);
161 case R_SPARC_WDISP22:
162 v -= (Elf_Addr) location;
163 *loc32 = (*loc32 & ~0x3fffff) |
164 ((v >> 2) & 0x3fffff);
168 *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
172 *loc32 = (*loc32 & ~0x3fffff) |
173 ((v >> 10) & 0x3fffff);
177 printk(KERN_ERR "module %s: Unknown relocation: %x\n",
179 (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
186 #ifdef CONFIG_SPARC64
187 static void do_patch_sections(const Elf_Ehdr *hdr,
188 const Elf_Shdr *sechdrs)
190 const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;
191 char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
193 for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
194 if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
196 if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
200 if (sun4v_1insn && tlb_type == hypervisor) {
201 void *p = (void *) sun4v_1insn->sh_addr;
202 sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size);
204 if (sun4v_2insn && tlb_type == hypervisor) {
205 void *p = (void *) sun4v_2insn->sh_addr;
206 sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size);
210 int module_finalize(const Elf_Ehdr *hdr,
211 const Elf_Shdr *sechdrs,
214 /* make jump label nops */
215 jump_label_apply_nops(me);
217 do_patch_sections(hdr, sechdrs);
219 /* Cheetah's I-cache is fully coherent. */
220 if (tlb_type == spitfire) {
224 for (va = 0; va < (PAGE_SIZE << 1); va += 32)
225 spitfire_put_icache_tag(va, 0x0);
226 __asm__ __volatile__("flush %g6");
231 #endif /* CONFIG_SPARC64 */