mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-19 19:40:06 +00:00
ed80b9ee77
2000-07-31 Jes Sorensen <jes@linuxcare.com> * sysdeps/ia64/elf/initfini.c: Kill dummy section since align and endp statements have already been added. 2000-04-18 David Mosberger <davidm@hpl.hp.com> * sysdeps/unix/sysv/linux/ia64/sysdep.h: Include <sysdeps/ia64/sysdep.h>. * sysdeps/ia64/_mcount.S: New file. * sysdeps/ia64/elf/initfini.c (_init): Preserve gp around call to __gmon_start__. Fix up extraneous whitespace. 2000-01-12 H.J. Lu <hjl@gnu.org> * sysdeps/ia64/elf/initfini.c: New file. 2000-07-31 Jes Sorensen <jes@linuxcare.com> * sysdeps/unix/sysv/linux/ia64/clone.S: Add stop bit to avoid WAW dependency between branch and ar.pfs write.
77 lines
2.2 KiB
ArmAsm
77 lines
2.2 KiB
ArmAsm
/* Copyright (C) 1999,2000 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. */
|
|
|
|
/* clone is even more special than fork as it mucks with stacks
|
|
and invokes a function in the right context after its all over. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
|
|
|
|
/*
|
|
* Used for both clone and fork system calls. Note that if fn is NULL
|
|
* then clone was called from fork.
|
|
*/
|
|
|
|
ENTRY(__clone)
|
|
add r2 = -16, r33 // save space for fn and arg
|
|
cmp.ne p6,p0 = 0,r33
|
|
;;
|
|
(p6) add r33 = -16, r33
|
|
add r12 = -16, r12
|
|
;;
|
|
(p6) st8 [r2] = r32, 8 // save fn for child
|
|
st8 [r12] = r32 // save fn for parent
|
|
;;
|
|
(p6) st8 [r2] = r35 // save arg for child
|
|
mov r32 = r34 // put flags in out0
|
|
DO_CALL (SYS_ify (clone))
|
|
1:
|
|
ld8 r33 = [r12], 8 // recover fn
|
|
;;
|
|
ld8 r32 = [r12], 8 // recover arg
|
|
|
|
cmp.eq p6,p0=-1,r10
|
|
(p6) br.cond.spnt.many __syscall_error // handle error
|
|
|
|
cmp.ne p7,p0=0,r8
|
|
(p7) ret // parent process, just return
|
|
|
|
cmp.eq p8,p0=0,r33
|
|
(p8) ret // fork call, return
|
|
|
|
alloc loc0 = ar.pfs,2,2,2,0
|
|
;;
|
|
ld8 r2 = [in1], 8 // get address of fn
|
|
mov out0 = in0
|
|
mov loc1 = gp // save gp across indirect call
|
|
;;
|
|
ld8 gp = [in1] // set new gp
|
|
mov b6 = r2
|
|
br.call.sptk b0 = b6 // call thread routine
|
|
;;
|
|
|
|
mov ar.pfs = loc0
|
|
mov gp = loc1
|
|
mov r32 = r8 // exit value
|
|
;;
|
|
br.call.sptk b0 = _exit // we're out of here
|
|
|
|
PSEUDO_END(__clone)
|
|
|
|
weak_alias (__clone, clone)
|