diff options
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | elf/Makefile | 10 | ||||
| -rw-r--r-- | elf/firstobj.c | 8 | ||||
| -rw-r--r-- | elf/initfirst.c | 22 | ||||
| -rw-r--r-- | linuxthreads/ChangeLog | 9 | ||||
| -rw-r--r-- | linuxthreads/Makefile | 36 | ||||
| -rw-r--r-- | linuxthreads/pthread.c | 4 | ||||
| -rw-r--r-- | linuxthreads/sysdeps/i386/Makefile | 5 | ||||
| -rw-r--r-- | linuxthreads/sysdeps/pthread/pt-initfini.c | 140 |
9 files changed, 233 insertions, 5 deletions
@@ -1,5 +1,9 @@ 2001-02-01 Ulrich Drepper <drepper@redhat.com> + * elf/Makefile: Add rules to build and run initfirst test. + * elf/initfirst.c: New file. + * elf/firstobj.c: New file. + * Makerules (build-shlib): Add $(extra-B-$(@F:lib%.so=%).so). * configure.in: Test for -z initfirst linker option. * config.make.in: Add have-z-initfirst. diff --git a/elf/Makefile b/elf/Makefile index 459d986..9d4bcdf 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -1,4 +1,4 @@ -# Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc. +# Copyright (C) 1995-1999, 2000, 2001 Free Software Foundation, Inc. # This file is part of the GNU C Library. # The GNU C Library is free software; you can redistribute it and/or @@ -101,7 +101,7 @@ tests = loadtest restest1 preloadtest loadfail multiload origtest resolvfail \ constload1 order $(tests-vis-$(have-protected)) noload filter unload \ reldep reldep2 reldep3 next $(tests-nodelete-$(have-z-nodelete)) \ $(tests-nodlopen-$(have-z-nodlopen)) neededtest neededtest2 \ - neededtest3 neededtest4 unload2 lateglobal + neededtest3 neededtest4 unload2 lateglobal initfirst test-srcs = tst-pathopt tests-vis-yes = vismain tests-nodelete-yes = nodelete @@ -114,7 +114,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \ $(modules-nodlopen-$(have-z-nodlopen)) filtmod1 filtmod2 \ reldepmod1 reldepmod2 reldepmod3 reldepmod4 nextmod1 nextmod2 \ neededobj1 neededobj2 neededobj3 neededobj4 \ - neededobj5 neededobj6 \ + neededobj5 neededobj6 firstobj \ unload2mod unload2dep ltglobmod1 ltglobmod2 pathoptobj modules-vis-yes = vismod1 vismod2 vismod3 modules-nodelete-yes = nodelmod1 nodelmod2 nodelmod3 nodelmod4 @@ -268,6 +268,7 @@ $(objpfx)neededobj4.so: $(objpfx)neededobj1.so $(objpfx)neededobj2.so \ $(objpfx)neededobj6.so: $(objpfx)neededobj5.so $(objpfx)unload2mod.so: $(objpfx)unload2dep.so $(objpfx)ltglobmod2.so: $(libdl) +$(objpfx)firstobj.so: $(shared-thread-library) # filtmod1.so has a special rule $(filter-out $(objpfx)filtmod1.so, $(test-modules)): $(objpfx)%.so: $(objpfx)%.os @@ -388,3 +389,6 @@ $(objpfx)tst-pathopt: $(libdl) $(objpfx)tst-pathopt.out: tst-pathopt.sh $(objpfx)tst-pathopt \ $(objpfx)pathoptobj.so $(SHELL) -e $< $(common-objpfx) + +$(objpfx)initfirst: $(libdl) +$(objpfx)initfirst.out: $(objpfx)firstobj.so diff --git a/elf/firstobj.c b/elf/firstobj.c new file mode 100644 index 0000000..1e7cb50 --- /dev/null +++ b/elf/firstobj.c @@ -0,0 +1,8 @@ +#include <errno.h> + +int +foo (void) +{ + errno = 0; + return 0; +} diff --git a/elf/initfirst.c b/elf/initfirst.c new file mode 100644 index 0000000..5ca83d2 --- /dev/null +++ b/elf/initfirst.c @@ -0,0 +1,22 @@ +#include <dlfcn.h> +#include <stdio.h> + +int +main (void) +{ + void *h = dlopen ("firstobj.so", RTLD_LAZY); + void *f; + if (! h) + { + printf ("cannot find firstobj.so: %s\n", dlerror ()); + return 1; + } + f = dlsym (h, "foo"); + if (! f) + { + printf ("cannot find symbol foo: %s\n", dlerror ()); + return 2; + } + ((void (*) (void)) f) (); + return 0; +} diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog index b28b706..e4739ca 100644 --- a/linuxthreads/ChangeLog +++ b/linuxthreads/ChangeLog @@ -1,3 +1,12 @@ +2001-02-01 Ulrich Drepper <drepper@redhat.com> + + * Makefile: Add rules to build crti.o and make it being used in + building libpthread.so. + * sysdeps/i386/Makefile: New file. + * sysdeps/pthread/pt-initfini.c: New file. + + * pthread.c: Cleanups. + 2001-01-28 Andreas Jaeger <aj@suse.de> * oldsemaphore.c (__old_sem_init): Adjust for last change. diff --git a/linuxthreads/Makefile b/linuxthreads/Makefile index d3364ea..9c80a00 100644 --- a/linuxthreads/Makefile +++ b/linuxthreads/Makefile @@ -38,12 +38,20 @@ libpthread-routines := attr cancel condvar join manager mutex ptfork \ oldsemaphore events getcpuclockid pspinlock barrier nodelete-yes = -Wl,--enable-new-dtags,-z,nodelete -LDFLAGS-pthread.so = $(nodelete-$(have-z-nodelete)) +initfirst-yes = -Wl,--enable-new-dtags,-z,initfirst +LDFLAGS-pthread.so = $(nodelete-$(have-z-nodelete)) \ + $(initfirst-$(have-z-initfirst)) vpath %.c Examples include ../Makeconfig +ifeq ($(build-shared),yes) +before-compile := $(objpfx)crti.o + +CFLAGS-pt-initfini.s = -g0 -fPIC -fno-inline-functions +endif + librt-tests = ex10 ex11 tests = ex1 ex2 ex3 ex4 ex5 ex6 ex7 ex8 ex9 $(librt-tests) ex12 ex13 joinrace \ tststack $(tests-nodelete-$(have-z-nodelete)) ecmutex ex14 ex15 ex16 @@ -54,6 +62,8 @@ endif include ../Rules +extra-B-pthread.so = -B$(common-objpfx)linuxthreads/ + znodelete-yes = -DHAVE_Z_NODELETE CFLAGS-mutex.c += -D__NO_WEAK_PTHREAD_ALIASES CFLAGS-specific.c += -D__NO_WEAK_PTHREAD_ALIASES @@ -80,3 +90,27 @@ ifeq ($(build-bounded),yes) $(tests:%=$(objpfx)%-bp): $(objpfx)libpthread_b.a $(librt-tests:%=$(objpfx)%-bp): $(common-objpfx)rt/librt_b.a endif + +ifeq ($(build-shared),yes) +vpath pt-initfini.c $(full_config_sysdirs) + +$(objpfx)pt-initfini.s: pt-initfini.c + $(compile.c) -S $(CFLAGS-pt-initfini.s) -finhibit-size-directive \ + $(patsubst -f%,-fno-%,$(exceptions)) -o $@ + +# We only have one kind of startup code files. Static binaries and +# shared libraries are build using the PIC version. +$(objpfx)crti.S: $(objpfx)pt-initfini.s + sed -n -e '1,/@HEADER_ENDS/p' \ + -e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \ + -e '/@TRAILER_BEGINS/,$$p' $< > $@ + +$(objpfx)defs.h: $(objpfx)pt-initfini.s + sed -n -e '/@TESTS_BEGIN/,/@TESTS_END/p' $< | \ + $(AWK) -f ../csu/defs.awk > $@ + +$(objpfx)crti.o: $(objpfx)crti.S $(objpfx)defs.h + $(compile.S) -g0 $(ASFLAGS-.os) -o $@ + +generated += crti.S defs.h pt-initfini.s +endif diff --git a/linuxthreads/pthread.c b/linuxthreads/pthread.c index 7b74b00..5a2ade7 100644 --- a/linuxthreads/pthread.c +++ b/linuxthreads/pthread.c @@ -352,7 +352,7 @@ is_smp_system (void) sizeof (sysctl_args) / sizeof (sysctl_args[0]), buf, &reslen, NULL, 0) < 0) { - /*This was not successful. Now try reading the /proc filesystem. */ + /* This was not successful. Now try reading the /proc filesystem. */ int fd = __open ("/proc/sys/kernel/version", O_RDONLY); if (__builtin_expect (fd, 0) == -1 || (reslen = __read (fd, buf, sizeof (buf))) <= 0) @@ -375,7 +375,9 @@ is_smp_system (void) static void pthread_initialize(void) __attribute__((constructor)); +#ifndef HAVE_Z_NODELETE extern void *__dso_handle __attribute__ ((weak)); +#endif /* Do some minimal initialization which has to be done during the diff --git a/linuxthreads/sysdeps/i386/Makefile b/linuxthreads/sysdeps/i386/Makefile new file mode 100644 index 0000000..811a799 --- /dev/null +++ b/linuxthreads/sysdeps/i386/Makefile @@ -0,0 +1,5 @@ +ifeq ($(subdir),linuxthreads) +# On i686 we must avoid generating the trampoline functions generated +# to get the GOT pointer. +CFLAGS-pt-initfini.s += -march=i386 -mcpu=i386 +endif diff --git a/linuxthreads/sysdeps/pthread/pt-initfini.c b/linuxthreads/sysdeps/pthread/pt-initfini.c new file mode 100644 index 0000000..a86c967 --- /dev/null +++ b/linuxthreads/sysdeps/pthread/pt-initfini.c @@ -0,0 +1,140 @@ +/* Special .init and .fini section support. Linuxthread version. + Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it + and/or modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Library General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file with other + programs, and to distribute those programs without any restriction + coming from the use of this file. (The Library General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into another program.) + + The GNU C Library is distributed in the hope that it will be + useful, but WITHOUT ANY WARRANTY; without even the implied warranty + of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* This file is compiled into assembly code which is then munged by a sed + script into two files: crti.s and crtn.s. + + * crti.s puts a function prologue at the beginning of the + .init and .fini sections and defines global symbols for + those addresses, so they can be called as functions. + + * crtn.s puts the corresponding function epilogues + in the .init and .fini sections. */ + +#include <stdlib.h> + +/* We use embedded asm for .section unconditionally, as this makes it + easier to insert the necessary directives into crtn.S. */ +#define SECTION(x) asm (".section " x ) + +/* Embed an #include to pull in the alignment and .end directives. */ +asm ("\n#include \"defs.h\""); + +/* The initial common code ends here. */ +asm ("\n/*@HEADER_ENDS*/"); + +/* To determine whether we need .end and .align: */ +asm ("\n/*@TESTS_BEGIN*/"); +extern void dummy (void (*foo) (void)); +void +dummy (void (*foo) (void)) +{ + if (foo) + (*foo) (); +} +asm ("\n/*@TESTS_END*/"); + +/* The beginning of _init: */ +asm ("\n/*@_init_PROLOG_BEGINS*/"); + +static void +call_initialize_minimal (void) +{ + __pthread_initialize_minimal (); +} + +static void +call_gmon_start(void) +{ + extern void __gmon_start__ (void) __attribute__ ((weak)); /*weak_extern (__gmon_start__);*/ + void (*gmon_start) (void) = __gmon_start__; + + if (gmon_start) + gmon_start (); +} + +SECTION (".init"); +extern void _init (void); +void +_init (void) +{ + /* The very first thing we must do is to set up the registers. */ + call_initialize_minimal (); + + /* We cannot use the normal constructor mechanism in gcrt1.o because it + appears before crtbegin.o in the link, so the header elt of .ctors + would come after the elt for __gmon_start__. One approach is for + gcrt1.o to reference a symbol which would be defined by some library + module which has a constructor; but then user code's constructors + would come first, and not be profiled. */ + call_gmon_start (); + + asm ("ALIGN"); + asm("END_INIT"); + /* Now the epilog. */ + asm ("\n/*@_init_PROLOG_ENDS*/"); + asm ("\n/*@_init_EPILOG_BEGINS*/"); + SECTION(".init"); +} +asm ("END_INIT"); + +/* End of the _init epilog, beginning of the _fini prolog. */ +asm ("\n/*@_init_EPILOG_ENDS*/"); +asm ("\n/*@_fini_PROLOG_BEGINS*/"); + +SECTION (".fini"); +extern void _fini (void); +void +_fini (void) +{ + + /* End of the _fini prolog. */ + asm ("ALIGN"); + asm ("END_FINI"); + asm ("\n/*@_fini_PROLOG_ENDS*/"); + + { + /* Let GCC know that _fini is not a leaf function by having a dummy + function call here. We arrange for this call to be omitted from + either crt file. */ + extern void i_am_not_a_leaf (void); + i_am_not_a_leaf (); + } + + /* Beginning of the _fini epilog. */ + asm ("\n/*@_fini_EPILOG_BEGINS*/"); + SECTION (".fini"); +} +asm ("END_FINI"); + +/* End of the _fini epilog. Any further generated assembly (e.g. .ident) + is shared between both crt files. */ +asm ("\n/*@_fini_EPILOG_ENDS*/"); +asm ("\n/*@TRAILER_BEGINS*/"); + +/* End of file. */ |