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Update.
2002-09-18 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/i386/clone.S: Add support for SETTLS and SETTID/CLEARTID. * signal/allocrtsig.c: Move to... * sysdeps/generic/allocrtsig.c: ...here. New file.
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Ulrich Drepper
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ChangeLog
10
ChangeLog
@ -1,3 +1,11 @@
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2002-09-18 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/unix/sysv/linux/i386/clone.S: Add support for SETTLS and
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SETTID/CLEARTID.
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* signal/allocrtsig.c: Move to...
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* sysdeps/generic/allocrtsig.c: ...here. New file.
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2002-09-17 Jakub Jelinek <jakub@redhat.com>
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* elf/dl-lookup.c (_dl_debug_bindings): Print TLS lookups always.
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@ -18,8 +26,6 @@
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file-specific variable override so it compiles properly when using
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--with-headers.
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* NEWS: Added item for powerpc64-linux port.
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2002-09-17 Steven Munroe <sjmunroe@us.ibm.com>
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Ported to PowerPC64 running Linux.
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94
sysdeps/generic/allocrtsig.c
Normal file
94
sysdeps/generic/allocrtsig.c
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@ -0,0 +1,94 @@
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/* Handle real-time signal allocation.
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Copyright (C) 1997,98,99,2002 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>, 1997.
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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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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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#include <signal.h>
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/* In these variables we keep track of the used variables. If the
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platform does not support any real-time signals we will define the
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values to some unreasonable value which will signal failing of all
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the functions below. */
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#ifndef __SIGRTMIN
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static int current_rtmin = -1;
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static int current_rtmax = -1;
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#else
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static int current_rtmin;
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static int current_rtmax;
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static int initialized;
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#include "testrtsig.h"
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static void
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init (void)
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{
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if (!kernel_has_rtsig ())
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{
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current_rtmin = -1;
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current_rtmax = -1;
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}
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else
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{
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current_rtmin = __SIGRTMIN;
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current_rtmax = __SIGRTMAX;
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}
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initialized = 1;
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}
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#endif
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/* Return number of available real-time signal with highest priority. */
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int
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__libc_current_sigrtmin (void)
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{
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#ifdef __SIGRTMIN
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if (!initialized)
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init ();
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#endif
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return current_rtmin;
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}
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/* Return number of available real-time signal with lowest priority. */
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int
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__libc_current_sigrtmax (void)
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{
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#ifdef __SIGRTMIN
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if (!initialized)
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init ();
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#endif
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return current_rtmax;
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}
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/* Allocate real-time signal with highest/lowest available
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priority. Please note that we don't use a lock since we assume
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this function to be called at program start. */
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int
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__libc_allocate_rtsig (int high)
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{
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#ifndef __SIGRTMIN
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return -1;
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#else
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if (!initialized)
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init ();
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if (current_rtmin == -1 || current_rtmin > current_rtmax)
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/* We don't have anymore signal available. */
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return -1;
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return high ? current_rtmin++ : current_rtmax--;
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#endif
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}
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@ -27,13 +27,19 @@
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#include <bp-sym.h>
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#include <bp-asm.h>
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/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
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/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
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pid_t *tid, struct user_desc *tls); */
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#define PARMS LINKAGE /* no space for saved regs */
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#define FUNC PARMS
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#define STACK FUNC+4
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#define FLAGS STACK+PTR_SIZE
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#define ARG FLAGS+4
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#define TID ARG+PTR_SIZE
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#define TLS TID+PTR_SIZE
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#define __NR_clone 120
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#define SYS_clone 120
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.text
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ENTRY (BP_SYM (__clone))
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@ -55,30 +61,34 @@ ENTRY (BP_SYM (__clone))
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#endif
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/* Insert the argument onto the new stack. */
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subl $8,%ecx
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subl $12,%ecx
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movl ARG(%esp),%eax /* no negative argument counts */
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movl %eax,4(%ecx)
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movl %eax,8(%ecx)
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/* Save the function pointer as the zeroth argument.
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It will be popped off in the child in the ebx frobbing below. */
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movl FUNC(%esp),%eax
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movl %eax,0(%ecx)
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movl %eax,4(%ecx)
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/* Do the system call */
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pushl %ebx
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movl FLAGS+4(%esp),%ebx
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pushl %esi
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movl TLS+8(%esp),%esi
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movl TID+8(%esp),%edx
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movl FLAGS+8(%esp),%ebx
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movl $SYS_ify(clone),%eax
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int $0x80
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popl %esi
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popl %ebx
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test %eax,%eax
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jl SYSCALL_ERROR_LABEL
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jz thread_start
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jz L(thread_start)
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L(pseudo_end):
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ret
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thread_start:
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L(thread_start):
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subl %ebp,%ebp /* terminate the stack frame */
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call *%ebx
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#ifdef PIC
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@ -87,8 +97,9 @@ L(here):
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popl %ebx
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addl $_GLOBAL_OFFSET_TABLE_+[.-L(here)], %ebx
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#endif
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pushl %eax
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call HIDDEN_JUMPTARGET (_exit)
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movl %eax, %ebx
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movl $SYS_ify(exit), %eax
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int $0x80
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PSEUDO_END (BP_SYM (__clone))
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