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326 lines
13 KiB
Diff
326 lines
13 KiB
Diff
commit db3d848e154b00071f4a5e729d5884efad410109
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Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Date: Wed Mar 15 15:44:59 2017 -0300
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Build divdi3 only for architecture that required it
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As noted in [1], divdi3 object is only exported in a handful ABIs
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(i386, m68k, powerpc32, s390-32, and ia64), however it is built
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for all current architectures regardless.
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This patch refact the make rules for this object to so only the
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aforementioned architectures that actually require it builds it.
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Also, to avoid internal PLT calls to the exported symbol from the
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module, glibc uses an internal header (symbol-hacks.h) which is
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unrequired (and in fact breaks the build for architectures that
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intend to get symbol definitions from libgcc.a). The patch also
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changes it to create its own header (divdi3-symbol-hacks.h) and
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adjust the architectures that require it accordingly.
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I checked the build/check (with run-built-tests=no) on the
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following architectures (which I think must cover all supported
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ABI/builds) using GCC 6.3:
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aarch64-linux-gnu
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alpha-linux-gnu
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arm-linux-gnueabihf
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hppa-linux-gnu
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ia64-linux-gnu
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m68k-linux-gnu
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microblaze-linux-gnu
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mips64-n32-linux-gnu
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mips-linux-gnu
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mips64-linux-gnu
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nios2-linux-gnu
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powerpc-linux-gnu
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powerpc-linux-gnu-power4
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powerpc64-linux-gnu
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powerpc64le-linux-gnu
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s390x-linux-gnu
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s390-linux-gnu
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sh4-linux-gnu
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sh4-linux-gnu-soft
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sparc64-linux-gnu
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sparcv9-linux-gnu
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tilegx-linux-gnu
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tilegx-linux-gnu-32
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tilepro-linux-gnu
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x86_64-linux-gnu
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x86_64-linux-gnu-x32
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i686-linux-gnu
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I only saw one regression on sparcv9-linux-gnu (extra PLT call to
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.udiv) which I address in next patch in the set. It also correctly
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build SH with GCC 7.0.1 (without any regression from c89721e25d).
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[1] https://sourceware.org/ml/libc-alpha/2017-03/msg00243.html
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* sysdeps/i386/symbol-hacks.h: New file.
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* sysdeps/m68k/symbol-hacks.h: New file.
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* sysdeps/powerpc/powerpc32/symbol-hacks.h: New file.
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* sysdeps/s390/s390-32/symbol-hacks.h: New file.
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* sysdeps/unix/sysv/linux/i386/Makefile
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[$(subdir) = csu] (sysdep_routines): New rule: divdi3 object.
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[$(subdir) = csu] (sysdep-only-routines): Likewise.
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[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
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* sysdeps/unix/sysv/linux/m68k/Makefile
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[$(subdir) = csu] (sysdep_routines): Likewise.
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[$(subdir) = csu] (sysdep-only-routines): Likewise.
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[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
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* sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile
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[$(subdir) = csu] (sysdep_routines): Likewise.
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[$(subdir) = csu] (sysdep-only-routines): Likewise.
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[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
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* sysdeps/unix/sysv/linux/s390/s390-32/Makefile
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[$(subdir) = csu] (sysdep_routines): Likewise.
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[$(subdir) = csu] (sysdep-only-routines): Likewise.
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[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
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* sysdeps/wordsize-32/Makefile: Remove file.
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* sysdeps/wordsize-32/symbol-hacks.h: Definitions move to ...
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* sysdeps/wordsize-32/divdi3-symbol-hacks.h: ... here.
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---
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sysdeps/i386/symbol-hacks.h | 21 ++++++++++++++
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sysdeps/m68k/symbol-hacks.h | 21 ++++++++++++++
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sysdeps/powerpc/powerpc32/symbol-hacks.h | 21 ++++++++++++++
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sysdeps/s390/s390-32/symbol-hacks.h | 21 ++++++++++++++
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sysdeps/unix/sysv/linux/i386/Makefile | 5 +++
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sysdeps/unix/sysv/linux/m68k/Makefile | 5 +++
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sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile | 8 +++++
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sysdeps/unix/sysv/linux/s390/s390-32/Makefile | 8 +++++
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sysdeps/wordsize-32/Makefile | 7 ----
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sysdeps/wordsize-32/divdi3-symbol-hacks.h | 31 +++++++++++++++++++++
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sysdeps/wordsize-32/symbol-hacks.h | 31 ---------------------
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11 files changed, 141 insertions(+), 38 deletions(-)
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--- /dev/null
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+++ b/sysdeps/i386/symbol-hacks.h
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@@ -0,0 +1,21 @@
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+/* Hacks needed for symbol manipulation. i386 version.
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+ Copyright (C) 2017 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#include <sysdeps/wordsize-32/divdi3-symbol-hacks.h>
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+
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+#include_next "symbol-hacks.h"
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--- /dev/null
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+++ b/sysdeps/m68k/symbol-hacks.h
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@@ -0,0 +1,21 @@
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+/* Hacks needed for symbol manipulation. m68k version.
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+ Copyright (C) 2017 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#include <sysdeps/wordsize-32/divdi3-symbol-hacks.h>
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+
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+#include_next "symbol-hacks.h"
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--- /dev/null
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+++ b/sysdeps/powerpc/powerpc32/symbol-hacks.h
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@@ -0,0 +1,21 @@
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+/* Hacks needed for symbol manipulation. powerpc version.
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+ Copyright (C) 2017 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#include <sysdeps/wordsize-32/divdi3-symbol-hacks.h>
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+
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+#include_next "symbol-hacks.h"
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--- /dev/null
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+++ b/sysdeps/s390/s390-32/symbol-hacks.h
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@@ -0,0 +1,21 @@
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+/* Hacks needed for symbol manipulation. s390 version.
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+ Copyright (C) 2017 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#include <sysdeps/wordsize-32/divdi3-symbol-hacks.h>
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+
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+#include_next "symbol-hacks.h"
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--- a/sysdeps/unix/sysv/linux/i386/Makefile
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+++ b/sysdeps/unix/sysv/linux/i386/Makefile
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@@ -55,6 +55,11 @@
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ifeq ($(subdir),csu)
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sysdep-dl-routines += sysdep
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+ifeq (yes,$(build-shared))
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+sysdep_routines += divdi3
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+shared-only-routines += divdi3
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+CPPFLAGS-divdi3.c = -Din_divdi3_c
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+endif
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endif
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ifeq ($(subdir),nptl)
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--- a/sysdeps/unix/sysv/linux/m68k/Makefile
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+++ b/sysdeps/unix/sysv/linux/m68k/Makefile
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@@ -4,6 +4,11 @@
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ifeq ($(subdir),csu)
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sysdep_routines += m68k-helpers
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+ifeq (yes,$(build-shared))
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+sysdep_routines += divdi3
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+shared-only-routines += divdi3
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+CPPFLAGS-divdi3.c = -Din_divdi3_c
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+endif
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endif
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ifeq ($(subdir),misc)
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--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile
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+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile
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@@ -1,2 +1,10 @@
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# See Makeconfig regarding the use of default-abi.
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default-abi := 32
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+
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+ifeq ($(subdir),csu)
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+ifeq (yes,$(build-shared))
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+sysdep_routines += divdi3
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+shared-only-routines += divdi3
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+CPPFLAGS-divdi3.c = -Din_divdi3_c
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+endif
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+endif
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--- a/sysdeps/unix/sysv/linux/s390/s390-32/Makefile
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+++ b/sysdeps/unix/sysv/linux/s390/s390-32/Makefile
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@@ -21,3 +21,11 @@
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ifeq ($(subdir),stdlib)
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sysdep_routines += __makecontext_ret
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endif
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+
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+ifeq ($(subdir),csu)
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+ifeq (yes,$(build-shared))
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+sysdep_routines += divdi3
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+shared-only-routines += divdi3
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+CPPFLAGS-divdi3.c = -Din_divdi3_c
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+endif
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+endif
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--- a/sysdeps/wordsize-32/Makefile
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+++ /dev/null
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@@ -1,7 +0,0 @@
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-ifeq ($(subdir),csu)
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-ifeq (yes,$(build-shared))
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-sysdep_routines += divdi3
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-shared-only-routines += divdi3
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-CPPFLAGS-divdi3.c = -Din_divdi3_c
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-endif
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-endif
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--- /dev/null
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+++ b/sysdeps/wordsize-32/divdi3-symbol-hacks.h
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@@ -0,0 +1,31 @@
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+/* Hacks needed for divdi3 symbol manipulation.
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+ Copyright (C) 2004-2017 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+/* A very dirty trick: gcc emits references to __divdi3, __udivdi3,
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+ __moddi3, and __umoddi3. These functions are exported and
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+ therefore we get PLTs. Unnecessarily so. Changing gcc is a big
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+ task which might not be worth it so we play tricks with the
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+ assembler.
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+ Note: in_divdi3_c is only used to avoid symbol alias on divdi3
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+ build itself. */
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+#if !defined __ASSEMBLER__ && !defined in_divdi3_c && IS_IN (libc) && defined SHARED
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+asm ("__divdi3 = __divdi3_internal");
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+asm ("__udivdi3 = __udivdi3_internal");
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+asm ("__moddi3 = __moddi3_internal");
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+asm ("__umoddi3 = __umoddi3_internal");
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+#endif
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--- a/sysdeps/wordsize-32/symbol-hacks.h
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+++ /dev/null
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@@ -1,31 +0,0 @@
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-/* Hacks needed for symbol manipulation.
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- Copyright (C) 2004-2017 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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-
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- The GNU C Library is free software; you can redistribute it and/or
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- modify it under the terms of the GNU Lesser General Public
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- License as published by the Free Software Foundation; either
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- version 2.1 of the License, or (at your option) any later version.
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-
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- The GNU C Library is distributed in the hope that it will be useful,
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- but WITHOUT ANY WARRANTY; without even the implied warranty of
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- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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- Lesser General Public License for more details.
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-
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- You should have received a copy of the GNU Lesser General Public
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- License along with the GNU C Library; if not, see
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- <http://www.gnu.org/licenses/>. */
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-
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-#include_next "symbol-hacks.h"
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-
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-/* A very dirty trick: gcc emits references to __divdi3, __udivdi3,
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- __moddi3, and __umoddi3. These functions are exported and
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- therefore we get PLTs. Unnecessarily so. Changing gcc is a big
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- task which might not be worth it so we play tricks with the
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- assembler. */
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-#if !defined __ASSEMBLER__ && !defined in_divdi3_c && IS_IN (libc) && defined SHARED
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-asm ("__divdi3 = __divdi3_internal");
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-asm ("__udivdi3 = __udivdi3_internal");
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-asm ("__moddi3 = __moddi3_internal");
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-asm ("__umoddi3 = __umoddi3_internal");
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-#endif
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