Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753711Ab1FSLrS (ORCPT ); Sun, 19 Jun 2011 07:47:18 -0400 Received: from mail.southpole.se ([193.12.106.18]:37751 "EHLO mail.southpole.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753607Ab1FSLpY (ORCPT ); Sun, 19 Jun 2011 07:45:24 -0400 From: Jonas Bonn To: linux-kernel@vger.kernel.org Cc: Jonas Bonn Subject: [PATCH 14/19] OpenRISC: Module support Date: Sun, 19 Jun 2011 13:43:40 +0200 Message-Id: <1308483825-6023-15-git-send-email-jonas@southpole.se> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1308483825-6023-1-git-send-email-jonas@southpole.se> References: <1308483825-6023-1-git-send-email-jonas@southpole.se> X-Assp-Client-SSL: yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3940 Lines: 147 Signed-off-by: Jonas Bonn --- arch/openrisc/kernel/module.c | 126 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 126 insertions(+), 0 deletions(-) create mode 100644 arch/openrisc/kernel/module.c diff --git a/arch/openrisc/kernel/module.c b/arch/openrisc/kernel/module.c new file mode 100644 index 0000000..952b129 --- /dev/null +++ b/arch/openrisc/kernel/module.c @@ -0,0 +1,126 @@ +/* + * 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 + * + * 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. + */ + +#include +#include +#include +#include +#include +#include + +void *module_alloc(unsigned long size) +{ + pr_debug("module_alloc size: %lu\n", 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; + 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_OR32_32: + *location = value; + break; + case R_OR32_CONST: + location = (uint16_t*)location + 1; + *((uint16_t*)location) = (uint16_t) (value); + break; + case R_OR32_CONSTH: + location = (uint16_t*)location + 1; + *((uint16_t*)location) = (uint16_t) (value >> 16); + break; + case R_OR32_JUMPTARG: + value -= (uint32_t)location; + value >>= 2; + value &= 0x03ffffff; + value |= *location & 0xfc000000; + *location = value; + break; + default: + pr_err("module %s: Unknown relocation: %u\n", + me->name, ELF32_R_TYPE(rel[i].r_info)); + break; + } + } + + return 0; +} + +int apply_relocate(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + pr_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) +{ +} -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/