/* 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_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){}