From c68d0fa2d88fc2134a38d99e7e944828384a7671 Mon Sep 17 00:00:00 2001 From: Austin Foxley Date: Sat, 17 Oct 2009 12:26:24 -0700 Subject: libpthread/nptl: core of the "Native Posix Threading Library" for uClibc targetting arm,sh,i386,mips,sparc for now Signed-off-by: Austin Foxley --- .../nptl/sysdeps/unix/sysv/linux/arm/pt-vfork.S | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 libpthread/nptl/sysdeps/unix/sysv/linux/arm/pt-vfork.S (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/arm/pt-vfork.S') diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/pt-vfork.S b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/pt-vfork.S new file mode 100644 index 000000000..b9d1ef768 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/pt-vfork.S @@ -0,0 +1,39 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + +/* Save the PID value. */ +#define SAVE_PID \ + str lr, [sp, #-4]!; /* Save LR. */ \ + mov r0, #0xffff0fff; /* Point to the high page. */ \ + mov lr, pc; /* Save our return address. */ \ + sub pc, r0, #31; /* Jump to the TLS entry. */ \ + ldr lr, [sp], #4; /* Restore LR. */ \ + mov r2, r0; /* Save the TLS addr in r2. */ \ + ldr r3, [r2, #PID_OFFSET]; /* Load the saved PID. */ \ + rsb r0, r3, #0; /* Negate it. */ \ + str r0, [r2, #PID_OFFSET] /* Store the temporary PID. */ + +/* Restore the old PID value in the parent. */ +#define RESTORE_PID \ + cmp r0, #0; /* If we are the parent... */ \ + strne r3, [r2, #PID_OFFSET] /* ... restore the saved PID. */ + +#INCLUDE <../../../../../../../LIBC/SYSDEPS/LINUX/ARM/VFORK.S> + -- cgit v1.2.3