// SPDX-License-Identifier: GPL-2.0+/*  Kernel module help for SH.     SHcompact version by Kaz Kojima and Paul Mundt.     SHmedia bits: 	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/bug.h>#include <linux/fs.h>#include <linux/string.h>#include <linux/kernel.h>#include <asm/unaligned.h>#include <asm/dwarf.h> 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;	uint32_t value; 	pr_debug("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; #ifdef CONFIG_SUPERH64		/* 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. */		relocation |= !!(sym->st_other & 4);#endif 		switch (ELF32_R_TYPE(rel[i].r_info)) {		case R_SH_NONE:			break;		case R_SH_DIR32:			value = get_unaligned(location);			value += relocation;			put_unaligned(value, location);			break;		case R_SH_REL32:			relocation = (relocation - (Elf32_Addr) location);			value = get_unaligned(location);			value += relocation;			put_unaligned(value, location);			break;		case R_SH_IMM_LOW16:			*location = (*location & ~0x3fffc00) |				((relocation & 0xffff) << 10);			break;		case R_SH_IMM_MEDLOW16:			*location = (*location & ~0x3fffc00) |				(((relocation >> 16) & 0xffff) << 10);			break;		case R_SH_IMM_LOW16_PCREL:			relocation -= (Elf32_Addr) location;			*location = (*location & ~0x3fffc00) |				((relocation & 0xffff) << 10);			break;		case R_SH_IMM_MEDLOW16_PCREL:			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 module_finalize(const Elf_Ehdr *hdr,		    const Elf_Shdr *sechdrs,		    struct module *me){	int ret = 0; 	ret |= module_dwarf_finalize(hdr, sechdrs, me); 	return ret;} void module_arch_cleanup(struct module *mod){	module_dwarf_cleanup(mod);}