kernel-ark/arch/sparc/kernel/module.c
Jonas Bonn 66574cc054 modules: make arch's use default loader hooks
This patch removes all the module loader hook implementations in the
architecture specific code where the functionality is the same as that
now provided by the recently added default hooks.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-07-24 22:06:04 +09:30

226 lines
4.7 KiB
C

/* Kernel module help for sparc64.
*
* Copyright (C) 2001 Rusty Russell.
* Copyright (C) 2002 David S. Miller.
*/
#include <linux/moduleloader.h>
#include <linux/kernel.h>
#include <linux/elf.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/gfp.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/mm.h>
#include <asm/processor.h>
#include <asm/spitfire.h>
#ifdef CONFIG_SPARC64
#include <linux/jump_label.h>
static void *module_map(unsigned long size)
{
if (PAGE_ALIGN(size) > MODULES_LEN)
return NULL;
return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
GFP_KERNEL, PAGE_KERNEL, -1,
__builtin_return_address(0));
}
static char *dot2underscore(char *name)
{
return name;
}
#else
static void *module_map(unsigned long size)
{
return vmalloc(size);
}
/* Replace references to .func with _Func */
static char *dot2underscore(char *name)
{
if (name[0] == '.') {
name[0] = '_';
name[1] = toupper(name[1]);
}
return name;
}
#endif /* CONFIG_SPARC64 */
void *module_alloc(unsigned long size)
{
void *ret;
/* We handle the zero case fine, unlike vmalloc */
if (size == 0)
return NULL;
ret = module_map(size);
if (!ret)
ret = ERR_PTR(-ENOMEM);
else
memset(ret, 0, size);
return ret;
}
/* Make generic code ignore STT_REGISTER dummy undefined symbols. */
int module_frob_arch_sections(Elf_Ehdr *hdr,
Elf_Shdr *sechdrs,
char *secstrings,
struct module *mod)
{
unsigned int symidx;
Elf_Sym *sym;
char *strtab;
int i;
for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
if (symidx == hdr->e_shnum-1) {
printk("%s: no symtab found.\n", mod->name);
return -ENOEXEC;
}
}
sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
if (sym[i].st_shndx == SHN_UNDEF) {
if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
sym[i].st_shndx = SHN_ABS;
} else {
char *name = strtab + sym[i].st_name;
dot2underscore(name);
}
}
}
return 0;
}
int apply_relocate_add(Elf_Shdr *sechdrs,
const char *strtab,
unsigned int symindex,
unsigned int relsec,
struct module *me)
{
unsigned int i;
Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
Elf_Sym *sym;
u8 *location;
u32 *loc32;
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
Elf_Addr v;
/* This is where to make the change */
location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ rel[i].r_offset;
loc32 = (u32 *) location;
#ifdef CONFIG_SPARC64
BUG_ON(((u64)location >> (u64)32) != (u64)0);
#endif /* CONFIG_SPARC64 */
/* This is the symbol it is referring to. Note that all
undefined symbols have been resolved. */
sym = (Elf_Sym *)sechdrs[symindex].sh_addr
+ ELF_R_SYM(rel[i].r_info);
v = sym->st_value + rel[i].r_addend;
switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
#ifdef CONFIG_SPARC64
case R_SPARC_64:
location[0] = v >> 56;
location[1] = v >> 48;
location[2] = v >> 40;
location[3] = v >> 32;
location[4] = v >> 24;
location[5] = v >> 16;
location[6] = v >> 8;
location[7] = v >> 0;
break;
case R_SPARC_DISP32:
v -= (Elf_Addr) location;
*loc32 = v;
break;
case R_SPARC_WDISP19:
v -= (Elf_Addr) location;
*loc32 = (*loc32 & ~0x7ffff) |
((v >> 2) & 0x7ffff);
break;
case R_SPARC_OLO10:
*loc32 = (*loc32 & ~0x1fff) |
(((v & 0x3ff) +
(ELF_R_TYPE(rel[i].r_info) >> 8))
& 0x1fff);
break;
#endif /* CONFIG_SPARC64 */
case R_SPARC_32:
case R_SPARC_UA32:
location[0] = v >> 24;
location[1] = v >> 16;
location[2] = v >> 8;
location[3] = v >> 0;
break;
case R_SPARC_WDISP30:
v -= (Elf_Addr) location;
*loc32 = (*loc32 & ~0x3fffffff) |
((v >> 2) & 0x3fffffff);
break;
case R_SPARC_WDISP22:
v -= (Elf_Addr) location;
*loc32 = (*loc32 & ~0x3fffff) |
((v >> 2) & 0x3fffff);
break;
case R_SPARC_LO10:
*loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
break;
case R_SPARC_HI22:
*loc32 = (*loc32 & ~0x3fffff) |
((v >> 10) & 0x3fffff);
break;
default:
printk(KERN_ERR "module %s: Unknown relocation: %x\n",
me->name,
(int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
return -ENOEXEC;
}
}
return 0;
}
#ifdef CONFIG_SPARC64
int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *me)
{
/* make jump label nops */
jump_label_apply_nops(me);
/* Cheetah's I-cache is fully coherent. */
if (tlb_type == spitfire) {
unsigned long va;
flushw_all();
for (va = 0; va < (PAGE_SIZE << 1); va += 32)
spitfire_put_icache_tag(va, 0x0);
__asm__ __volatile__("flush %g6");
}
return 0;
}
#endif /* CONFIG_SPARC64 */