From patchwork Sun Oct 17 12:38:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 12564217 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E47A6C433F5 for ; Sun, 17 Oct 2021 12:39:31 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 98A1061212 for ; Sun, 17 Oct 2021 12:39:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 98A1061212 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=csgroup.eu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 3E26D6B007E; Sun, 17 Oct 2021 08:39:31 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 393406B0080; Sun, 17 Oct 2021 08:39:31 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 25A676B0081; Sun, 17 Oct 2021 08:39:31 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0247.hostedemail.com [216.40.44.247]) by kanga.kvack.org (Postfix) with ESMTP id 13DAF6B007E for ; Sun, 17 Oct 2021 08:39:31 -0400 (EDT) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id C141F180AD81A for ; Sun, 17 Oct 2021 12:39:30 +0000 (UTC) X-FDA: 78705885300.11.4F43271 Received: from pegase2.c-s.fr (pegase2.c-s.fr [93.17.235.10]) by imf05.hostedemail.com (Postfix) with ESMTP id 246C6507D4C5 for ; Sun, 17 Oct 2021 12:39:27 +0000 (UTC) Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4HXKM81tvjz9sSk; Sun, 17 Oct 2021 14:39:16 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9ep1nBrdLyEL; Sun, 17 Oct 2021 14:39:16 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4HXKM01C2Rz9sSp; Sun, 17 Oct 2021 14:39:08 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 060B18B776; Sun, 17 Oct 2021 14:39:08 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id uOZoUsjCvn3j; Sun, 17 Oct 2021 14:39:07 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.203.38]) by messagerie.si.c-s.fr (Postfix) with ESMTP id D5DC58B778; Sun, 17 Oct 2021 14:39:06 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.16.1/8.16.1) with ESMTPS id 19HCctLC2946745 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sun, 17 Oct 2021 14:38:55 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.16.1/8.16.1/Submit) id 19HCcthS2946744; Sun, 17 Oct 2021 14:38:55 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Andrew Morton , "James E.J. Bottomley" , Helge Deller , Arnd Bergmann , Kees Cook , Greg Kroah-Hartman Cc: Christophe Leroy , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v3 04/12] powerpc: Prepare func_desc_t for refactorisation Date: Sun, 17 Oct 2021 14:38:17 +0200 Message-Id: <86c393ce0a6f603f94e6d2ceca08d535f654bb23.1634457599.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1634474303; l=1910; s=20211009; h=from:subject:message-id; bh=nHgQgFrfZgHAs28pN2VtYBt7B1ZdOmikgTPEmDQGwUs=; b=eocMCBbEV1TFGbprF03T3Lb2TPcMEi9cOyFVpZztt93wi8rjs6VDNXRzngC9WbhWR2LwBs4FgeuF zvKc5KypBu54ML31yMoXIImf7TbaNzFjgtwJD1EzLqwK46LGcK+0 X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-Rspamd-Queue-Id: 246C6507D4C5 X-Stat-Signature: xc3ykbwg49ancybd6be4o45pn6hkagai Authentication-Results: imf05.hostedemail.com; dkim=none; spf=pass (imf05.hostedemail.com: domain of christophe.leroy@csgroup.eu designates 93.17.235.10 as permitted sender) smtp.mailfrom=christophe.leroy@csgroup.eu; dmarc=none X-Rspamd-Server: rspam02 X-HE-Tag: 1634474367-164909 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: In preparation of making func_desc_t generic, change the ELFv2 version to a struct containing 'addr' element. This allows using single helpers common to ELFv1 and ELFv2. Signed-off-by: Christophe Leroy Acked-by: Nicholas Piggin Reviewed-by: Kees Cook --- arch/powerpc/kernel/module_64.c | 32 ++++++++++++++------------------ 1 file changed, 14 insertions(+), 18 deletions(-) diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c index a89da0ee25e2..b687ef88c4c4 100644 --- a/arch/powerpc/kernel/module_64.c +++ b/arch/powerpc/kernel/module_64.c @@ -33,19 +33,13 @@ #ifdef PPC64_ELF_ABI_v2 /* An address is simply the address of the function. */ -typedef unsigned long func_desc_t; +typedef struct { + unsigned long addr; +} func_desc_t; static func_desc_t func_desc(unsigned long addr) { - return addr; -} -static unsigned long func_addr(unsigned long addr) -{ - return addr; -} -static unsigned long stub_func_addr(func_desc_t func) -{ - return func; + return (func_desc_t){addr}; } /* PowerPC64 specific values for the Elf64_Sym st_other field. */ @@ -70,14 +64,6 @@ static func_desc_t func_desc(unsigned long addr) { return *(struct func_desc *)addr; } -static unsigned long func_addr(unsigned long addr) -{ - return func_desc(addr).addr; -} -static unsigned long stub_func_addr(func_desc_t func) -{ - return func.addr; -} static unsigned int local_entry_offset(const Elf64_Sym *sym) { return 0; @@ -93,6 +79,16 @@ void *dereference_module_function_descriptor(struct module *mod, void *ptr) } #endif +static unsigned long func_addr(unsigned long addr) +{ + return func_desc(addr).addr; +} + +static unsigned long stub_func_addr(func_desc_t func) +{ + return func.addr; +} + #define STUB_MAGIC 0x73747562 /* stub */ /* Like PPC32, we need little trampolines to do > 24-bit jumps (into