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| author | Ulrich Drepper <drepper@redhat.com> | 2001-02-19 18:55:39 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2001-02-19 18:55:39 +0000 |
| commit | 4c48dc9386ff50f960ae9d7d71493bfd85ccb979 (patch) | |
| tree | babe088b6a157319a72cb0145be4a7b09e32202f /sysdeps/unix/sysv/linux/ia64/clone2.S | |
| parent | b99a3ee2223e29059b00616365625cc9c55a362e (diff) | |
| download | glibc-4c48dc9386ff50f960ae9d7d71493bfd85ccb979.tar.gz glibc-4c48dc9386ff50f960ae9d7d71493bfd85ccb979.tar.xz glibc-4c48dc9386ff50f960ae9d7d71493bfd85ccb979.zip | |
Update.
2001-02-18 Mark Kettenis <kettenis@gnu.org> * malloc/mtrace.c [USE_IN_LIBIO]: Define fopen as _IO_fopen64. (mtrace): Revert 2001-02-13 patch: use fopen instead of fopen64. 2001-02-17 H.J. Lu <hjl@gnu.org> * sysdeps/unix/sysv/linux/ia64/clone2.S: Use clone2 and don't use scratch registers across the system call.
Diffstat (limited to 'sysdeps/unix/sysv/linux/ia64/clone2.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/ia64/clone2.S | 45 |
1 files changed, 14 insertions, 31 deletions
diff --git a/sysdeps/unix/sysv/linux/ia64/clone2.S b/sysdeps/unix/sysv/linux/ia64/clone2.S index 5c3e88a498..491f2cccb1 100644 --- a/sysdeps/unix/sysv/linux/ia64/clone2.S +++ b/sysdeps/unix/sysv/linux/ia64/clone2.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2000 Free Software Foundation, Inc. +/* Copyright (C) 2000, 2001 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 @@ -24,7 +24,8 @@ /* size_t child_stack_size, int flags, void *arg) */ ENTRY(__clone2) - cmp.eq p6,p0=0,r32 + alloc r2=ar.pfs,5,2,3,0 + cmp.eq p6,p0=0,in0 mov r8=EINVAL (p6) br.cond.spnt.few __syscall_error ;; @@ -34,28 +35,12 @@ ENTRY(__clone2) /* 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)) + mov loc0=in0 /* save fn */ + mov loc1=in4 /* save arg */ + mov out0=in3 /* Flags are first syscall argument. */ + mov out1=in1 /* Stack address. */ + mov out2=in2 /* Stack size. */ + DO_CALL (SYS_ify (clone2)) cmp.eq p6,p0=-1,r10 ;; (p6) br.cond.spnt.few __syscall_error @@ -64,18 +49,16 @@ ENTRY(__clone2) # 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). */ +(CHILD) ld8 out1=[loc0],8 /* Retrieve code pointer. */ +(CHILD) mov out0=loc1 /* Pass proper argument to fn */ (PARENT) ret ;; - ld8 gp=[r14] /* Load function gp. */ - mov b6=r34 + ld8 gp=[loc0] /* Load function gp. */ + mov b6=out1 ;; br.call.dptk.few rp=b6 /* Call fn(arg) in the child */ ;; - mov r32=r8 /* Argument to _exit */ + mov out0=r8 /* Argument to _exit */ .globl _exit br.call.dpnt.few rp=_exit /* call _exit with result from fn. */ ret /* Not reached. */ |