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Update.
2002-07-19 Ulrich Drepper <drepper@redhat.com> * configure.in: Add test for __thread support in compiler. * config.h.in: Add HAVE___THREAD. * Makefile (headers): Remove errno.h, sys/errno.h, and bits/errno.h. * include/sys/errno.h: Moved to... * stdlib/sys/errno.h: ...here. New file. * stdlib/errno.h: New file. Moved from... * include/errno.h: ...here. Changed into an internal header defining libc-local things like __set_errno. * stdlib/Makefile (headers): Add errno.h, sys/errno.h, and bits/errno.h. * elf/dl-minimal.c: Include <tls.h>. Define errno as thread-local variable if USE_TLS && HAVE___THREAD. Don't define __errno_location either. * elf/rtld.c (_dl_start): Add code to initialize TLS for ld.so from... (_dl_start_final): ...here. Add code to initialize tls elements from bootstrap_map. * sysdeps/generic/errno-loc.c: Define errno as thread-local variable if USE_TLS && HAVE___THREAD. * sysdeps/generic/bits/errno.h: Remove __set_errno definition. * sysdeps/mach/hurd/bits/errno.h: Likewise. * sysdeps/standalone/arm/bits/errno.h: Likewise. * sysdeps/standalone/bits/errno.h: Likewise. * sysdeps/unix/bsd/bsd4.4/bits/errno.h: Likewise. * sysdeps/unix/sysv/aix/bits/errno.h: Likewise. * sysdeps/unix/sysv/hpux/bits/errno.h: Likewise. * sysdeps/unix/sysv/linux/bits/errno.h: Likewise. * sysdeps/unix/sysv/linux/hppa/bits/errno.h: Likewise. * sysdeps/unix/sysv/linux/mips/bits/errno.h: Likewise. * sysdeps/unix/sysv/sysv4/solaris2/bits/errno.h: Likewise. * sysdeps/i386/dl-machine.c (elf_machine_rel) [RTLD_BOOTSTRAP]: Don't use GL(dl_rtld_map), use map parameter. * sysdeps/sh/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/unix/sysv/linux/i386/sysdep.S: Define errno in .tbss if USE_TLS && HAVE___THREAD. * sysdeps/unix/sysv/linux/i386/sysdep.h: Unify SETUP_PIC_REG definitions. If USE_TLS && HAVE___THREAD store errooor value using TLS code sequence. * sysdeps/unix/sysv/linux/i386/i686/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/getcwd.c: No real need to restore errno. * sysdeps/unix/sysv/linux/grantpt.c: Likewise. * sysdeps/unix/sysv/linux/internal_statvfs.c: Likewise. * sysdeps/unix/sysv/linux/msgctl.c: Likewise. * sysdeps/unix/sysv/linux/readv.c: Likewise. * sysdeps/unix/sysv/linux/writev.c: Likewise.
This commit is contained in:
Ulrich Drepper
@@ -1,3 +1,12 @@
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2002-07-19 Ulrich Drepper <drepper@redhat.com>
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* errno.c (__errno_location): Don't define unless !USE_TLS
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|| !HAVE___THREAD.
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* sysdeps/i386/pt-machine.c: Protect C code with #ifndef ASSEMBLER.
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* sysdeps/i386/tls.h: Likewise.
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* sysdeps/i386/useldt.h: Likewise.
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* sysdeps/i386/i686/pt-machine.h: Likewise.
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2002-07-02 H.J. Lu <hjl@gnu.org>
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* sysdeps/mips/pspinlock.c: Don't include <sgidefs.h>. Always
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@@ -17,14 +17,18 @@
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#include <errno.h>
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#include <netdb.h>
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#include <resolv.h>
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#include <tls.h>
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#include "pthread.h"
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#include "internals.h"
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#if !USE_TLS || !HAVE___THREAD
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/* The definition in libc is sufficient if we use TLS. */
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int * __errno_location()
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{
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pthread_descr self = thread_self();
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return THREAD_GETMEM (self, p_errnop);
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}
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#endif
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int * __h_errno_location()
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{
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@@ -27,6 +27,7 @@
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#endif
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#include "kernel-features.h"
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#ifndef ASSEMBLER
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extern long int testandset (int *spinlock);
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extern int __compare_and_swap (long int *p, long int oldval, long int newval);
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@@ -66,6 +67,7 @@ __compare_and_swap (long int *p, long int oldval, long int newval)
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: "memory");
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return ret;
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}
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#endif
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#if __ASSUME_LDT_WORKS > 0
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#include "../useldt.h"
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@@ -22,6 +22,7 @@
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#ifndef _PT_MACHINE_H
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#define _PT_MACHINE_H 1
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#ifndef ASSEMBLER
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#ifndef PT_EI
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# define PT_EI extern inline
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#endif
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@@ -102,5 +103,6 @@ compare_and_swap_is_available (void)
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Otherwise, it's a 486 or above and it has cmpxchg. */
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return changed != 0;
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}
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#endif /* ASSEMBLER */
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#endif /* pt-machine.h */
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@@ -20,9 +20,10 @@
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#ifndef _TLS_H
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#define _TLS_H
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#include <stddef.h>
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# include <pt-machine.h>
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#include <pt-machine.h>
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#ifndef ASSEMBLER
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# include <stddef.h>
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/* Type for the dtv. */
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typedef union dtv
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@@ -39,56 +40,58 @@ typedef struct
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dtv_t *dtv;
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void *self; /* Pointer to the thread descriptor. */
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} tcbhead_t;
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#endif
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/* We can support TLS only if the floating-stack support is available. */
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#if defined FLOATING_STACKS && defined HAVE_TLS_SUPPORT
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/* Get system call information. */
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# include <sysdep.h>
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/* Signal that TLS support is available. */
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# define USE_TLS 1
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# ifndef ASSEMBLER
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/* Get system call information. */
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# include <sysdep.h>
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/* Get the thread descriptor definition. */
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# include <linuxthreads/descr.h>
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# include <linuxthreads/descr.h>
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/* This is the size of the initial TCB. */
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# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
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# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
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/* Alignment requirements for the initial TCB. */
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# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
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# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
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/* This is the size of the TCB. */
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# define TLS_TCB_SIZE sizeof (struct _pthread_descr_struct)
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# define TLS_TCB_SIZE sizeof (struct _pthread_descr_struct)
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/* Alignment requirements for the TCB. */
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# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
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# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
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/* The TCB can have any size and the memory following the address the
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thread pointer points to is unspecified. Allocate the TCB there. */
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# define TLS_TCB_AT_TP 1
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# define TLS_TCB_AT_TP 1
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/* Install the dtv pointer. The pointer passed is to the element with
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index -1 which contain the length. */
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# define INSTALL_DTV(descr, dtvp) \
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# define INSTALL_DTV(descr, dtvp) \
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((tcbhead_t *) descr)->dtv = dtvp + 1
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/* Install new dtv for current thread. */
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# define INSTALL_NEW_DTV(dtv) \
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# define INSTALL_NEW_DTV(dtv) \
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({ struct _pthread_descr_struct *__descr; \
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THREAD_SETMEM (__descr, p_header.data.dtvp, dtv); })
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/* Return dtv of given thread descriptor. */
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# define GET_DTV(descr) \
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# define GET_DTV(descr) \
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(((tcbhead_t *) descr)->dtv)
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/* Code to initially initialize the thread pointer. This might need
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special attention since 'errno' is not yet available and if the
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operation can cause a failure 'errno' must not be touched. */
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# define TLS_INIT_TP(descr) \
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# define TLS_INIT_TP(descr) \
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do { \
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void *_descr = (descr); \
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struct modify_ldt_ldt_s ldt_entry = \
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@@ -116,10 +119,11 @@ typedef struct
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/* Return the address of the dtv for the current thread. */
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# define THREAD_DTV() \
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# define THREAD_DTV() \
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({ struct _pthread_descr_struct *__descr; \
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THREAD_GETMEM (__descr, p_header.data.dtvp); })
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#endif /* FLOATING_STACKS && HAVE_TLS_SUPPORT */
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# endif /* FLOATING_STACKS && HAVE_TLS_SUPPORT */
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#endif /* __ASSEMBLER__ */
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#endif /* tls.h */
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@@ -1,6 +1,6 @@
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/* Special definitions for ix86 machine using segment register based
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thread descriptor.
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Copyright (C) 1998, 2000, 2001 Free Software Foundation, Inc.
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Copyright (C) 1998, 2000, 2001, 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>.
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@@ -19,6 +19,7 @@
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef ASSEMBLER
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#include <stddef.h> /* For offsetof. */
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#include <stdlib.h> /* For abort(). */
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@@ -198,6 +199,7 @@ extern int __modify_ldt (int, struct modify_ldt_ldt_s *, size_t);
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member))); \
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} \
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})
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#endif
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/* We want the OS to assign stack addresses. */
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#define FLOATING_STACKS 1
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