From patchwork Sat Jun 21 00:59:57 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joseph Myers X-Patchwork-Id: 362394 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 9DFB8140088 for ; Sat, 21 Jun 2014 11:00:16 +1000 (EST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:to:subject:message-id:mime-version :content-type; q=dns; s=default; b=iLW5uZQ8p89C7sPz3tvUU5wxsL+5d Kcm9Pj0f3BCNx//Co6W5Klerl0eGbtH3CKubxjurBI5mDTHo6CNlkA6ChO7X9w8t TGUpvwI7g508d8kmHAO925bMC7d+eCAloqy68ZoDorZTnRzdoeggF20TY35nc8u4 lyiGnGHKS3H174= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:to:subject:message-id:mime-version :content-type; s=default; bh=rLrlddNH/AiC/n212313igrQeuo=; b=Vrj YPCoJV9uAPF51OozkVc9lWK/yEabNwbF+31nL+eIfEmFAwFC3B3VSQG4Ge/CKtif Y8lsundK3NfDT0s+vHxMHVW6GSR7m1SvHTnaXP1+TUPbRaeBHloVrMZ91hfRkWVM sqmb0ipucJuUnPbiZ+yacSt7boxWs7BLKLII22xw= Received: (qmail 11163 invoked by alias); 21 Jun 2014 01:00:10 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 11116 invoked by uid 89); 21 Jun 2014 01:00:06 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-0.6 required=5.0 tests=AWL, BAYES_50 autolearn=ham version=3.3.2 X-HELO: relay1.mentorg.com Date: Sat, 21 Jun 2014 00:59:57 +0000 From: "Joseph S. Myers" To: Subject: Remove ARM __ASSUME_SIGFRAME_V2 Message-ID: MIME-Version: 1.0 This patch removes ARM __ASSUME_SIGFRAME_V2 now that the 2.6.18-and-later signal frame layout can be assumed, renaming the affected functions accordingly now only one version of them is needed in glibc. (sigrestorer.S did not in fact include and it appears that, unlike other such cases, it didn't get the header indirectly, so the v1 functions would have been compiled in even when sigaction.c didn't reference them.) (alpha and hppa also have architecture-specific __ASSUME_* macros that should now be removed: __ASSUME_FDATASYNC and __ASSUME_LWS_CAS respectively. I don't have any plans to do anything on that myself.) Tested on ARM and committed. 2014-06-21 Joseph Myers * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_SIGFRAME_V2): Remove macro. * sysdeps/unix/sysv/linux/arm/sigrestorer.S: Update comment. [!__ASSUME_SIGFRAME_V2]: Remove conditional code. (__default_sa_restorer_v2): Rename to __default_sa_restorer. (__default_rt_sa_restorer_v2): Rename to __default_rt_sa_restorer. * sysdeps/unix/sysv/linux/arm/sigaction.c (__default_sa_restorer): Declare as function. Remove conditional macro definitions. (__default_rt_sa_restorer): Likewise. (__default_sa_restorer_v1): Remove declaration. (__default_sa_restorer_v2): Likewise. (__default_rt_sa_restorer_v1): Likewise. (__default_rt_sa_restorer_v2): Likewise. * sysdeps/unix/sysv/linux/arm/Versions (GLIBC_PRIVATE): Remove __default_sa_restorer_v1, __default_rt_sa_restorer_v1, __default_sa_restorer_v2 and __default_rt_sa_restorer_v2. diff --git a/sysdeps/unix/sysv/linux/arm/Versions b/sysdeps/unix/sysv/linux/arm/Versions index b0e9a4c..a251b0f 100644 --- a/sysdeps/unix/sysv/linux/arm/Versions +++ b/sysdeps/unix/sysv/linux/arm/Versions @@ -10,7 +10,5 @@ libc { GLIBC_PRIVATE { # A copy of sigaction lives in libpthread, and needs these. __default_sa_restorer; __default_rt_sa_restorer; - __default_sa_restorer_v1; __default_rt_sa_restorer_v1; - __default_sa_restorer_v2; __default_rt_sa_restorer_v2; } } diff --git a/sysdeps/unix/sysv/linux/arm/kernel-features.h b/sysdeps/unix/sysv/linux/arm/kernel-features.h index 354f2ca..e755741 100644 --- a/sysdeps/unix/sysv/linux/arm/kernel-features.h +++ b/sysdeps/unix/sysv/linux/arm/kernel-features.h @@ -17,9 +17,6 @@ License along with the GNU C Library. If not, see . */ -/* The signal frame layout changed in 2.6.18. */ -#define __ASSUME_SIGFRAME_V2 1 - /* Support for the recvmmsg syscall was added in 2.6.33. */ #if __LINUX_KERNEL_VERSION >= 0x020621 # define __ASSUME_RECVMMSG_SYSCALL 1 diff --git a/sysdeps/unix/sysv/linux/arm/sigaction.c b/sysdeps/unix/sysv/linux/arm/sigaction.c index 21df885..e1d87cb 100644 --- a/sysdeps/unix/sysv/linux/arm/sigaction.c +++ b/sysdeps/unix/sysv/linux/arm/sigaction.c @@ -30,22 +30,8 @@ #define SA_RESTORER 0x04000000 -extern void __default_sa_restorer_v1(void); -extern void __default_sa_restorer_v2(void); -extern void __default_rt_sa_restorer_v1(void); -extern void __default_rt_sa_restorer_v2(void); -#ifdef __ASSUME_SIGFRAME_V2 -# define __default_sa_restorer __default_sa_restorer_v2 -# define __default_rt_sa_restorer __default_rt_sa_restorer_v2 -#else -# include -# define __default_sa_restorer (GLRO(dl_osversion) >= 0x020612 \ - ? __default_sa_restorer_v2 \ - : __default_sa_restorer_v1) -# define __default_rt_sa_restorer (GLRO(dl_osversion) >= 0x020612 \ - ? __default_rt_sa_restorer_v2 \ - : __default_rt_sa_restorer_v1) -#endif +extern void __default_sa_restorer (void); +extern void __default_rt_sa_restorer (void); /* When RT signals are in use we need to use a different return stub. */ #define choose_restorer(flags) \ diff --git a/sysdeps/unix/sysv/linux/arm/sigrestorer.S b/sysdeps/unix/sysv/linux/arm/sigrestorer.S index 566c04a..e1698d3 100644 --- a/sysdeps/unix/sysv/linux/arm/sigrestorer.S +++ b/sysdeps/unix/sysv/linux/arm/sigrestorer.S @@ -28,10 +28,7 @@ Start the unwind tables at least one instruction before the signal trampoline, because the unwinder will assume we are returning after - a call site. - - Because the signal frame layout changed in 2.6.18, we provide two - copies of these functions with different unwind information. */ + a call site. */ /* Used in ENTRY. */ #undef cfi_startproc @@ -60,58 +57,28 @@ cfi_offset (r14, OFFSET + 14 * 4); \ cfi_offset (r15, OFFSET + 15 * 4) -#ifndef __ASSUME_SIGFRAME_V2 -#define OFFSET 12 - .fnstart - .save {r0-r15} - .pad #OFFSET - nop -ENTRY(__default_sa_restorer_v1) - CFI - mov r7, $SYS_ify(sigreturn) - swi 0x0 - .fnend -END(__default_sa_restorer_v1) -#undef OFFSET -#endif /* __ASSUME_SIGFRAME_V2 */ - #define OFFSET 32 .fnstart .save {r0-r15} .pad #OFFSET nop -ENTRY(__default_sa_restorer_v2) +ENTRY(__default_sa_restorer) CFI mov r7, $SYS_ify(sigreturn) swi 0x0 .fnend -END(__default_sa_restorer_v2) -#undef OFFSET - -#ifndef __ASSUME_SIGFRAME_V2 -#define OFFSET 168 - .fnstart - .save {r0-r15} - .pad #OFFSET - nop -ENTRY(__default_rt_sa_restorer_v1) - CFI - mov r7, $SYS_ify(rt_sigreturn) - swi 0x0 - .fnend -END(__default_rt_sa_restorer_v1) +END(__default_sa_restorer) #undef OFFSET -#endif /* __ASSUME_SIGFRAME_V2 */ #define OFFSET 160 .fnstart .save {r0-r15} .pad #OFFSET nop -ENTRY(__default_rt_sa_restorer_v2) +ENTRY(__default_rt_sa_restorer) CFI mov r7, $SYS_ify(rt_sigreturn) swi 0x0 .fnend -END(__default_rt_sa_restorer_v2) +END(__default_rt_sa_restorer) #undef OFFSET