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authorUlrich Drepper <drepper@redhat.com>2000-07-15 17:32:51 +0000
committerUlrich Drepper <drepper@redhat.com>2000-07-15 17:32:51 +0000
commit101c92fc39425a6e9010c769e3ae6c42c95fe7a8 (patch)
tree662ab8582d78d96f93d65d72e45f9cd4dba1fbd7 /sysdeps
parenta9a4127ea6fdb692f3b0fdf2a88a4a8e254e453c (diff)
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Update.
2000-07-12 H.J. Lu <hjl@gnu.org> * sysdeps/unix/sysv/linux/ia64/Versions (libc): Add __clone2 to GLIBC_2.2. * sysdeps/unix/sysv/linux/ia64/Dist: Add clone2.S. * sysdeps/unix/sysv/linux/ia64/Makefile [$(subdir)=misc] (sysdep-routines): Add clone2. * sysdeps/unix/sysv/linux/ia64/clone2.S: New.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/ia64/Dist1
-rw-r--r--sysdeps/unix/sysv/linux/ia64/Makefile2
-rw-r--r--sysdeps/unix/sysv/linux/ia64/Versions6
-rw-r--r--sysdeps/unix/sysv/linux/ia64/clone2.S89
4 files changed, 97 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/ia64/Dist b/sysdeps/unix/sysv/linux/ia64/Dist
index 070d527..987b0ef 100644
--- a/sysdeps/unix/sysv/linux/ia64/Dist
+++ b/sysdeps/unix/sysv/linux/ia64/Dist
@@ -1,3 +1,4 @@
+clone2.S
ioperm.c
sys/procfs.h
sys/io.h
diff --git a/sysdeps/unix/sysv/linux/ia64/Makefile b/sysdeps/unix/sysv/linux/ia64/Makefile
index 33a63b2..8acb64a 100644
--- a/sysdeps/unix/sysv/linux/ia64/Makefile
+++ b/sysdeps/unix/sysv/linux/ia64/Makefile
@@ -4,5 +4,5 @@ endif
ifeq ($(subdir),misc)
sysdep_headers += sys/io.h
-sysdep_routines += ioperm
+sysdep_routines += ioperm clone2
endif
diff --git a/sysdeps/unix/sysv/linux/ia64/Versions b/sysdeps/unix/sysv/linux/ia64/Versions
index bdee8fd..24ce601 100644
--- a/sysdeps/unix/sysv/linux/ia64/Versions
+++ b/sysdeps/unix/sysv/linux/ia64/Versions
@@ -4,3 +4,9 @@ ld {
_dl_pagesize;
}
}
+libc {
+ GLIBC_2.2 {
+ # linuxthreads
+ __clone2;
+ }
+}
diff --git a/sysdeps/unix/sysv/linux/ia64/clone2.S b/sysdeps/unix/sysv/linux/ia64/clone2.S
new file mode 100644
index 0000000..5c3e88a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/clone2.S
@@ -0,0 +1,89 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+
+ 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.
+
+ 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, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+
+#include <sysdep.h>
+#include <asm/errno.h>
+
+
+/* int __clone2(int (*fn) (void *arg), void *child_stack_base, */
+/* size_t child_stack_size, int flags, void *arg) */
+
+ENTRY(__clone2)
+ cmp.eq p6,p0=0,r32
+ mov r8=EINVAL
+(p6) br.cond.spnt.few __syscall_error
+ ;;
+ flushrs /* This is necessary, since the child */
+ /* will be running with the same */
+ /* register backing store for a few */
+ /* instructions. We need to ensure */
+ /* that it will not read or write the */
+ /* backing store. */
+ mov r17=ar.rsc /* save ar.rsc */
+ mov r14=r32 /* save fn */
+ mov r18=r33 /* save child_stack_base */
+ /* Note that r15 is used to pass */
+ /* syscall # to kernel & not preserved. */
+ mov r16=r36 /* save arg */
+ ;;
+ dep r36=0,r17,0,2 /* set to enforced lazy mode. */
+ ;;
+ mov ar.rsc=r36
+ cmp.ne p7,p0=0,r33 /* stack_base 0? */
+ ;;
+(p7) add r33=r33,r34 /* Stack base arg to syscall is */
+ /* 0 if child_stack_base is 0, */
+ /* child_stack_base + child_stack_size */
+ /* otherwise. */
+ /* The system call interface seems */
+ /* quite contrived at this point. If */
+ /* we don't pass the backing store */
+ /* pointer, why do we pass the sp? */
+ mov r32=r35 /* Flags are first syscall argument. */
+ DO_CALL (SYS_ify (clone))
+ cmp.eq p6,p0=-1,r10
+ ;;
+(p6) br.cond.spnt.few __syscall_error
+
+# define CHILD p6
+# define PARENT p7
+ cmp.eq CHILD,PARENT=0,r8 /* Are we the child? */
+ ;;
+(CHILD) ld8 r34=[r14],8 /* Retrieve code pointer. */
+(CHILD) mov ar.bspstore=r18 /* Set register backing store in the child */
+(CHILD) mov r32=r16 /* Pass proper argument to fn */
+ mov ar.rsc=r17 /* Restore RSE mode (both threads). */
+(PARENT) ret
+ ;;
+ ld8 gp=[r14] /* Load function gp. */
+ mov b6=r34
+ ;;
+ br.call.dptk.few rp=b6 /* Call fn(arg) in the child */
+ ;;
+ mov r32=r8 /* Argument to _exit */
+ .globl _exit
+ br.call.dpnt.few rp=_exit /* call _exit with result from fn. */
+ ret /* Not reached. */
+
+PSEUDO_END(__clone2)
+
+/* For now we leave __clone undefined. This is unlikely to be a */
+/* problem, since at least the i386 __clone in glibc always failed */
+/* with a 0 sp (eventhough the kernel explicitly handled it). */
+/* Thus all such calls needed to pass an explicit sp, and as a result, */
+/* would be unlikely to work on ia64. */