+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.
+
2002-09-17 Jakub Jelinek <jakub@redhat.com>
* elf/dl-lookup.c (_dl_debug_bindings): Print TLS lookups always.
file-specific variable override so it compiles properly when using
--with-headers.
- * NEWS: Added item for powerpc64-linux port.
-
2002-09-17 Steven Munroe <sjmunroe@us.ibm.com>
Ported to PowerPC64 running Linux.
--- /dev/null
+/* Handle real-time signal allocation.
+ Copyright (C) 1997,98,99,2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <signal.h>
+
+/* In these variables we keep track of the used variables. If the
+ platform does not support any real-time signals we will define the
+ values to some unreasonable value which will signal failing of all
+ the functions below. */
+#ifndef __SIGRTMIN
+static int current_rtmin = -1;
+static int current_rtmax = -1;
+#else
+static int current_rtmin;
+static int current_rtmax;
+
+static int initialized;
+
+#include "testrtsig.h"
+
+static void
+init (void)
+{
+ if (!kernel_has_rtsig ())
+ {
+ current_rtmin = -1;
+ current_rtmax = -1;
+ }
+ else
+ {
+ current_rtmin = __SIGRTMIN;
+ current_rtmax = __SIGRTMAX;
+ }
+ initialized = 1;
+}
+#endif
+
+/* Return number of available real-time signal with highest priority. */
+int
+__libc_current_sigrtmin (void)
+{
+#ifdef __SIGRTMIN
+ if (!initialized)
+ init ();
+#endif
+ return current_rtmin;
+}
+
+/* Return number of available real-time signal with lowest priority. */
+int
+__libc_current_sigrtmax (void)
+{
+#ifdef __SIGRTMIN
+ if (!initialized)
+ init ();
+#endif
+ return current_rtmax;
+}
+
+/* Allocate real-time signal with highest/lowest available
+ priority. Please note that we don't use a lock since we assume
+ this function to be called at program start. */
+int
+__libc_allocate_rtsig (int high)
+{
+#ifndef __SIGRTMIN
+ return -1;
+#else
+ if (!initialized)
+ init ();
+ if (current_rtmin == -1 || current_rtmin > current_rtmax)
+ /* We don't have anymore signal available. */
+ return -1;
+
+ return high ? current_rtmin++ : current_rtmax--;
+#endif
+}
#include <bp-sym.h>
#include <bp-asm.h>
-/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+ pid_t *tid, struct user_desc *tls); */
#define PARMS LINKAGE /* no space for saved regs */
#define FUNC PARMS
#define STACK FUNC+4
#define FLAGS STACK+PTR_SIZE
#define ARG FLAGS+4
+#define TID ARG+PTR_SIZE
+#define TLS TID+PTR_SIZE
+
+#define __NR_clone 120
+#define SYS_clone 120
.text
ENTRY (BP_SYM (__clone))
#endif
/* Insert the argument onto the new stack. */
- subl $8,%ecx
+ subl $12,%ecx
movl ARG(%esp),%eax /* no negative argument counts */
- movl %eax,4(%ecx)
+ movl %eax,8(%ecx)
/* Save the function pointer as the zeroth argument.
It will be popped off in the child in the ebx frobbing below. */
movl FUNC(%esp),%eax
- movl %eax,0(%ecx)
+ movl %eax,4(%ecx)
/* Do the system call */
pushl %ebx
- movl FLAGS+4(%esp),%ebx
+ pushl %esi
+ movl TLS+8(%esp),%esi
+ movl TID+8(%esp),%edx
+ movl FLAGS+8(%esp),%ebx
movl $SYS_ify(clone),%eax
int $0x80
+ popl %esi
popl %ebx
test %eax,%eax
jl SYSCALL_ERROR_LABEL
- jz thread_start
+ jz L(thread_start)
L(pseudo_end):
ret
-thread_start:
+L(thread_start):
subl %ebp,%ebp /* terminate the stack frame */
call *%ebx
#ifdef PIC
popl %ebx
addl $_GLOBAL_OFFSET_TABLE_+[.-L(here)], %ebx
#endif
- pushl %eax
- call HIDDEN_JUMPTARGET (_exit)
+ movl %eax, %ebx
+ movl $SYS_ify(exit), %eax
+ int $0x80
PSEUDO_END (BP_SYM (__clone))
projects / thirdparty / glibc.git / commitdiff
