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Support crti.S and crtn.S provided directly by architectures.
This commit is contained in:
Joseph Myers
parent
a22f12b477
commit
3add8e1353
18
ChangeLog
18
ChangeLog
@ -1,3 +1,21 @@
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2012-02-08 Joseph Myers <joseph@codesourcery.com>
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Support crti.S and crtn.S provided directly by architectures.
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* csu/Makefile [crti.S in sysdirs] (generated): Do not append.
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[crti.S in sysdirs] (omit-deps): Likewise.
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[crti.S in sysdirs] (CFLAGS-initfini.s): Do not define variable.
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[crti.S in sysdirs] ($(crtstuff:%=$(objpfx)%.o)): Disable rule.
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[crti.S in sysdirs] ($(objpfx)initfini.s): Likewise.
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[crti.S in sysdirs] ($(objpfx)crti.S): Likewise.
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[crti.S in sysdirs] ($(objpfx)crtn.S): Likewise.
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[crti.S in sysdirs] ($(patsubst %,$(objpfx)crt%.o,i n)): Likewise.
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[crti.S in sysdirs] ($(objpfx)defs.h): Likewise.
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[crti.S in sysdirs] (initfini.c): Remove vpath directive.
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* sysdeps/i386/crti.S, sysdeps/i386/crtn.S: New files, based on
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compiler output for sysdeps/generic/initfini.c.
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* sysdeps/i386/elf/Makefile: Remove file.
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* sysdeps/i386/Makefile (CFLAGS-initfini.s): Remove variable.
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2012-02-07 Marek Polacek <polacek@redhat.com>
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* sysdeps/generic/_G_config.h: Remove _G_ARGS macro.
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@ -84,6 +84,13 @@ crtstuff = crti crtn
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install-lib += $(crtstuff:=.o)
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extra-objs += $(crtstuff:=.o)
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# Conditionals on the existence of a sysdeps version of crti.S are
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# temporary until all targets either have such a file or have been
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# removed, after which the old approach of postprocessing compiler
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# output will be removed.
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ifeq (,$(wildcard $(sysdirs:%=%/crti.S)))
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generated += $(crtstuff:=.S) initfini.s defs.h
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omit-deps += $(crtstuff)
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@ -122,6 +129,8 @@ $(objpfx)defs.h: $(objpfx)initfini.s
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endif
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endif
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extra-objs += abi-note.o init.o
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asm-CPPFLAGS += -I$(objpfx).
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@ -1,3 +1,19 @@
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2012-02-08 Joseph Myers <joseph@codesourcery.com>
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Support crti.S and crtn.S provided directly by architectures.
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* Makefile [crti.S in sysdirs] (omit-deps): Do not append.
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[crti.S in sysdirs] (CFLAGS-pt-initfini.s): Do not define variable.
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[crti.S in sysdirs] ($(objpfx)pt-initfini.s): Disable rule.
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[crti.S in sysdirs] ($(objpfx)crti.S): Likewise.
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[crti.S in sysdirs] ($(objpfx)crtn.S): Likewise.
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[crti.S in sysdirs] ($(objpfx)defs.h): Likewise.
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[crti.S in sysdirs] ($(objpfx)crti.o): Likewise.
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[crti.S in sysdirs] ($(objpfx)crtn.o): Likewise.
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[crti.S in sysdirs] (pt-initfini.c): Remove vpath directive.
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[crti.S in sysdirs] ($(objpfx)crti.o): New rule.
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* pt-crti.S: New file.
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* sysdeps/unix/sysv/linux/i386/Makefile: Remove file.
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2012-02-03 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S: Use
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@ -335,15 +335,23 @@ ifneq (,$(patsubst .,,$(multidir)))
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generated-dirs := $(firstword $(subst /, , $(multidir)))
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crti-objs += $(multidir)/crti.o
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crtn-objs += $(multidir)/crtn.o
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# Conditionals on the existence of a sysdeps version of crti.S are
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# temporary until all targets either have such a file or have been
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# removed, after which the old approach of postprocessing compiler
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# output will be removed.
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ifeq (,$(wildcard $(sysdirs:%=%/crti.S)))
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omit-deps += $(multidir)/crti $(multidir)/crtn
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endif
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$(objpfx)$(multidir):
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mkdir -p $@
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endif
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extra-objs += $(crti-objs) $(crtn-objs)
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ifeq (,$(wildcard $(sysdirs:%=%/crti.S)))
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omit-deps += crti crtn
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CFLAGS-pt-initfini.s = -g0 -fPIC -fno-inline-functions $(fno-unit-at-a-time)
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endif
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endif
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CFLAGS-flockfile.c = -D_IO_MTSAFE_IO
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CFLAGS-ftrylockfile.c = -D_IO_MTSAFE_IO
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@ -542,15 +550,24 @@ $(addprefix $(objpfx),$(tests) $(test-srcs)): $(objpfx)libpthread.a
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endif
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ifeq ($(build-shared),yes)
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ifeq (,$(wildcard $(sysdirs:%=%/crti.S)))
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vpath pt-initfini.c $(sysdirs)
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$(objpfx)pt-initfini.s: pt-initfini.c
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$(compile.c) -S $(CFLAGS-pt-initfini.s) -finhibit-size-directive \
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$(patsubst -f%,-fno-%,$(exceptions)) -o $@
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endif
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$(objpfx)tst-cleanup0.out: /dev/null $(objpfx)tst-cleanup0
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$(make-test-out) 2>&1 | cmp - tst-cleanup0.expect > $@
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ifneq (,$(wildcard $(sysdirs:%=%/crti.S)))
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$(objpfx)crti.o: $(objpfx)pt-crti.o
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ln -f $< $@
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else
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# We only have one kind of startup code files. Static binaries and
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# shared libraries are build using the PIC version.
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$(objpfx)crti.S: $(objpfx)pt-initfini.s
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@ -572,6 +589,8 @@ $(objpfx)crti.o: $(objpfx)crti.S $(objpfx)defs.h
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$(objpfx)crtn.o: $(objpfx)crtn.S $(objpfx)defs.h
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$(compile.S) -g0 $(ASFLAGS-.os) -o $@
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endif
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ifneq ($(multidir),.)
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$(objpfx)$(multidir)/crti.o: $(objpfx)crti.o $(objpfx)$(multidir)/
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ln -f $< $@
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44
nptl/pt-crti.S
Normal file
44
nptl/pt-crti.S
Normal file
@ -0,0 +1,44 @@
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/* Special .init and .fini section support for libpthread.
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Copyright (C) 2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
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coming from the use of this file. (The GNU Lesser General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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Note that people who make modified versions of this file are not
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obligated to grant this special exception for their modified
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versions; it is their choice whether to do so. The GNU Lesser
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General Public License gives permission to release a modified
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version without this exception; this exception also makes it
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possible to release a modified version which carries forward this
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exception.
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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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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* Arrange for __pthread_initialize_minimal_internal to be called at
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libpthread startup, instead of conditionally calling
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__gmon_start__. */
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#define PREINIT_FUNCTION __pthread_initialize_minimal_internal
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#define PREINIT_FUNCTION_WEAK 0
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#include <crti.S>
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@ -1,3 +0,0 @@
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ifeq ($(subdir),nptl)
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CFLAGS-pt-initfini.s += -fno-asynchronous-unwind-tables
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endif
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@ -5,12 +5,6 @@ asm-CPPFLAGS += -DGAS_SYNTAX
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# The i386 `long double' is a distinct type we support.
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long-double-fcts = yes
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ifeq ($(subdir),csu)
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# On i686 we must avoid generating the trampoline functions generated
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# to get the GOT pointer.
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CFLAGS-initfini.s += -march=i386 -mtune=i386
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endif
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ifeq ($(subdir),gmon)
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sysdep_routines += i386-mcount
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endif
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85
sysdeps/i386/crti.S
Normal file
85
sysdeps/i386/crti.S
Normal file
@ -0,0 +1,85 @@
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/* Special .init and .fini section support for x86.
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Copyright (C) 1995-2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
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coming from the use of this file. (The GNU Lesser General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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Note that people who make modified versions of this file are not
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obligated to grant this special exception for their modified
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versions; it is their choice whether to do so. The GNU Lesser
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General Public License gives permission to release a modified
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version without this exception; this exception also makes it
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possible to release a modified version which carries forward this
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exception.
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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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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* crti.S puts a function prologue at the beginning of the .init and
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.fini sections and defines global symbols for those addresses, so
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they can be called as functions. The symbols _init and _fini are
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magic and cause the linker to emit DT_INIT and DT_FINI. */
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#include <libc-symbols.h>
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#include <sysdep.h>
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#ifndef PREINIT_FUNCTION
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# define PREINIT_FUNCTION __gmon_start__
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#endif
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#ifndef PREINIT_FUNCTION_WEAK
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# define PREINIT_FUNCTION_WEAK 1
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#endif
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#if PREINIT_FUNCTION_WEAK
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weak_extern (PREINIT_FUNCTION)
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#else
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.hidden PREINIT_FUNCTION
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#endif
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.section .init,"ax",@progbits
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.p2align 2
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.globl _init
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.type _init, @function
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_init:
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pushl %ebx
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/* Maintain 16-byte stack alignment for called functions. */
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subl $8, %esp
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LOAD_PIC_REG (bx)
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#if PREINIT_FUNCTION_WEAK
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movl PREINIT_FUNCTION@GOT(%ebx), %eax
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testl %eax, %eax
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je .Lno_weak_fn
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call PREINIT_FUNCTION@PLT
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.Lno_weak_fn:
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#else
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call PREINIT_FUNCTION
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#endif
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.section .fini,"ax",@progbits
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.p2align 2
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.globl _fini
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.type _fini, @function
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_fini:
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pushl %ebx
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subl $8, %esp
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LOAD_PIC_REG (bx)
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48
sysdeps/i386/crtn.S
Normal file
48
sysdeps/i386/crtn.S
Normal file
@ -0,0 +1,48 @@
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/* Special .init and .fini section support for x86.
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Copyright (C) 1995-2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
|
||||
coming from the use of this file. (The GNU Lesser General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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Note that people who make modified versions of this file are not
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obligated to grant this special exception for their modified
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versions; it is their choice whether to do so. The GNU Lesser
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General Public License gives permission to release a modified
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version without this exception; this exception also makes it
|
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possible to release a modified version which carries forward this
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exception.
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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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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* crtn.S puts function epilogues in the .init and .fini sections
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corresponding to the prologues in crti.S. */
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.section .init,"ax",@progbits
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addl $8, %esp
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popl %ebx
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ret
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.section .fini,"ax",@progbits
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addl $8, %esp
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popl %ebx
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ret
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@ -1,4 +0,0 @@
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ifeq ($(subdir),csu)
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# Turn off -fasynchronous-unwind-tables
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CFLAGS-initfini.s += -fno-asynchronous-unwind-tables
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endif
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