/* Copyright (C) 2006 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. In addition to the permissions in the GNU Lesser General Public License, the Free Software Foundation gives you unlimited permission to link the compiled version of this file with other programs, and to distribute those programs without any restriction coming from the use of this file. (The GNU Lesser General Public License restrictions do apply in other respects; for example, they cover modification of the file, and distribution when not linked into another program.) Note that people who make modified versions of this file are not obligated to grant this special exception for their modified versions; it is their choice whether to do so. The GNU Lesser General Public License gives permission to release a modified version without this exception; this exception also makes it possible to release a modified version which carries forward this exception. 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, see . */ #include #ifdef __UCLIBC_HAS_THREADS_NATIVE__ #include #if defined __thumb__ /* Out-of-line atomic operations that we can't do in Thumb mode. This ends up in various libraries where it is needed (and a few .a archives where it isn't). */ .hidden __thumb_swpb ENTRY (__thumb_swpb) swpb r0, r0, [r1] bx lr END (__thumb_swpb) .hidden __thumb_swp ENTRY (__thumb_swp) swp r0, r0, [r1] bx lr END (__thumb_swp) .hidden __thumb_cmpxchg ENTRY (__thumb_cmpxchg) stmdb sp!, {r4, lr} mov r4, r0 0: ldr r3, [r2] cmp r3, r4 bne 1f mov r0, r4 mov r3, #0xffff0fff mov lr, pc add pc, r3, #(0xffff0fc0 - 0xffff0fff) bcc 0b mov r3, r4 1: mov r0, r3 ldmia sp!, {r4, pc} END (__thumb_cmpxchg) #endif /* __thumb__ */ #endif /* __UCLIBC_HAS_THREADS_NATIVE__ */