// SPDX-License-Identifier: GPL-2.0-or-later/* * OpenRISC module.c * * Linux architectural port borrowing liberally from similar works of * others.  All original copyrights apply as per the original source * declaration. * * Modifications for the OpenRISC architecture: * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> */ #include <linux/moduleloader.h>#include <linux/elf.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;	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);		value = sym->st_value + rel[i].r_addend; 		switch (ELF32_R_TYPE(rel[i].r_info)) {		case R_OR1K_32:			*location = value;			break;		case R_OR1K_LO_16_IN_INSN:			*((uint16_t *)location + 1) = value;			break;		case R_OR1K_HI_16_IN_INSN:			*((uint16_t *)location + 1) = value >> 16;			break;		case R_OR1K_INSN_REL_26:			value -= (uint32_t)location;			value >>= 2;			value &= 0x03ffffff;			value |= *location & 0xfc000000;			*location = value;			break;		case R_OR1K_AHI16:			/* Adjust the operand to match with a signed LO16.  */			value += 0x8000;			*((uint16_t *)location + 1) = value >> 16;			break;		case R_OR1K_SLO16:			/* Split value lower 16-bits.  */			value = ((value & 0xf800) << 10) | (value & 0x7ff);			*location = (*location & ~0x3e007ff) | value;			break;		default:			pr_err("module %s: Unknown relocation: %u\n",			       me->name, ELF32_R_TYPE(rel[i].r_info));			break;		}	} 	return 0;}