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/* 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/string.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
#include <asm/processor.h>
#include <asm/spitfire.h>
static void *module_map(unsigned long size)
{
struct vm_struct *area;
size = PAGE_ALIGN(size);
if (!size || size > MODULES_LEN)
return NULL;
area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
if (!area)
return NULL;
return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
}
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;
}
/* Free memory returned from module_core_alloc/module_init_alloc */
void module_free(struct module *mod, void *module_region)
{
vfree(module_region);
/* FIXME: If module_region == mod->init_region, trim exception
table entries. */
}
/* 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;
Elf64_Sym *sym;
const 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 = (Elf64_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 &&
ELF64_ST_TYPE(sym[i].st_info) == STT_REGISTER)
sym[i].st_shndx = SHN_ABS;
}
return 0;
}
int apply_relocate(Elf64_Shdr *sechdrs,
const char *strtab,
unsigned int symindex,
unsigned int relsec,
struct module *me)
{
printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n",
me->name);
return -ENOEXEC;
}
int apply_relocate_add(Elf64_Shdr *sechdrs,
const char *strtab,
unsigned int symindex,
unsigned int relsec,
struct module *me)
{
unsigned int i;
Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr;
Elf64_Sym *sym;
u8 *location;
u32 *loc32;
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
Elf64_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;
BUG_ON(((u64)location >> (u64)32) != (u64)0);
/* This is the symbol it is referring to. Note that all
undefined symbols have been resolved. */
sym = (Elf64_Sym *)sechdrs[symindex].sh_addr
+ ELF64_R_SYM(rel[i].r_info);
v = sym->st_value + rel[i].r_addend;
switch (ELF64_R_TYPE(rel[i].r_info) & 0xff) {
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_32:
location[0] = v >> 24;
location[1] = v >> 16;
location[2] = v >> 8;
location[3] = v >> 0;
break;
case R_SPARC_DISP32:
v -= (Elf64_Addr) location;
*loc32 = v;
break;
case R_SPARC_WDISP30:
v -= (Elf64_Addr) location;
*loc32 = (*loc32 & ~0x3fffffff) |
((v >> 2) & 0x3fffffff);
break;
case R_SPARC_WDISP22:
v -= (Elf64_Addr) location;
*loc32 = (*loc32 & ~0x3fffff) |
((v >> 2) & 0x3fffff);
break;
case R_SPARC_WDISP19:
v -= (Elf64_Addr) location;
*loc32 = (*loc32 & ~0x7ffff) |
((v >> 2) & 0x7ffff);
break;
case R_SPARC_LO10:
*loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
break;
case R_SPARC_HI22:
*loc32 = (*loc32 & ~0x3fffff) |
((v >> 10) & 0x3fffff);
break;
case R_SPARC_OLO10:
*loc32 = (*loc32 & ~0x1fff) |
(((v & 0x3ff) +
(ELF64_R_TYPE(rel[i].r_info) >> 8))
& 0x1fff);
break;
default:
printk(KERN_ERR "module %s: Unknown relocation: %x\n",
me->name,
(int) (ELF64_R_TYPE(rel[i].r_info) & 0xff));
return -ENOEXEC;
};
}
return 0;
}
int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *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;
}
void module_arch_cleanup(struct module *mod)
{
}
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