/*  Kernel module help for sh64.    This program is free software; you can redistribute it and/or modify    it under the terms of the GNU General Public License as published by    the Free Software Foundation; either version 2 of the License, or    (at your option) any later version.    This program is distributed in the hope that it will be useful,    but WITHOUT ANY WARRANTY; without even the implied warranty of    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the    GNU General Public License for more details.    You should have received a copy of the GNU General Public License    along with this program; if not, write to the Free Software    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA    Copyright 2004 SuperH (UK) Ltd    Author: Richard Curnow    Based on the sh version, and on code from the sh64-specific parts of    modutils, originally written by Richard Curnow and Ben Gaster.*/#include <linux/moduleloader.h>#include <linux/elf.h>#include <linux/vmalloc.h>#include <linux/fs.h>#include <linux/string.h>#include <linux/kernel.h>#if 0#define DEBUGP printk#else#define DEBUGP(fmt...)#endifvoid *module_alloc(unsigned long size){	if (size == 0)		return NULL;	return vmalloc(size);}/* Free memory returned from module_alloc */void module_free(struct module *mod, void *module_region){	vfree(module_region);	/* FIXME: If module_region == mod->init_region, trim exception           table entries. */}/* We don't need anything special. */int module_frob_arch_sections(Elf_Ehdr *hdr,			      Elf_Shdr *sechdrs,			      char *secstrings,			      struct module *mod){	return 0;}int apply_relocate_add(Elf32_Shdr *sechdrs,		   const char *strtab,		   unsigned int symindex,		   unsigned int relsec,		   struct module *me){	unsigned int i;	Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;	Elf32_Sym *sym;	Elf32_Addr relocation;	uint32_t *location;	int align;	int is_shmedia;	DEBUGP("Applying relocate section %u to %u\n", relsec,	       sechdrs[relsec].sh_info);	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {		/* This is where to make the change */		location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr			+ rel[i].r_offset;		/* This is the symbol it is referring to.  Note that all		   undefined symbols have been resolved.  */		sym = (Elf32_Sym *)sechdrs[symindex].sh_addr			+ ELF32_R_SYM(rel[i].r_info);		relocation = sym->st_value + rel[i].r_addend;		align = (int)location & 3;		/* For text addresses, bit2 of the st_other field indicates		 * whether the symbol is SHmedia (1) or SHcompact (0).  If		 * SHmedia, the LSB of the symbol needs to be asserted		 * for the CPU to be in SHmedia mode when it starts executing		 * the branch target. */		is_shmedia = (sym->st_other & 4) ? 1 : 0;		if (is_shmedia) {			relocation |= 1;		}		switch (ELF32_R_TYPE(rel[i].r_info)) {		case R_SH_DIR32:			DEBUGP("R_SH_DIR32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);			*location += relocation;			break;		case R_SH_REL32:			DEBUGP("R_SH_REL32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);			relocation -= (Elf32_Addr) location;			*location += relocation;			break;		case R_SH_IMM_LOW16:			DEBUGP("R_SH_IMM_LOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);			*location = (*location & ~0x3fffc00) |				((relocation & 0xffff) << 10);			break;		case R_SH_IMM_MEDLOW16:			DEBUGP("R_SH_IMM_MEDLOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);			*location = (*location & ~0x3fffc00) |				(((relocation >> 16) & 0xffff) << 10);			break;		case R_SH_IMM_LOW16_PCREL:			DEBUGP("R_SH_IMM_LOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);			relocation -= (Elf32_Addr) location;			*location = (*location & ~0x3fffc00) |				((relocation & 0xffff) << 10);			break;		case R_SH_IMM_MEDLOW16_PCREL:			DEBUGP("R_SH_IMM_MEDLOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);			relocation -= (Elf32_Addr) location;			*location = (*location & ~0x3fffc00) |				(((relocation >> 16) & 0xffff) << 10);			break;		default:			printk(KERN_ERR "module %s: Unknown relocation: %u\n",			       me->name, ELF32_R_TYPE(rel[i].r_info));			return -ENOEXEC;		}	}	return 0;}int apply_relocate(Elf32_Shdr *sechdrs,		       const char *strtab,		       unsigned int symindex,		       unsigned int relsec,		       struct module *me){	printk(KERN_ERR "module %s: REL RELOCATION unsupported\n",	       me->name);	return -ENOEXEC;}int module_finalize(const Elf_Ehdr *hdr,		    const Elf_Shdr *sechdrs,		    struct module *me){	return 0;}void module_arch_cleanup(struct module *mod){}