diff options
Diffstat (limited to 'cpukit/score/cpu/arm/arm-context-volatile-clobber.S')
| -rw-r--r-- | cpukit/score/cpu/arm/arm-context-volatile-clobber.S | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/cpukit/score/cpu/arm/arm-context-volatile-clobber.S b/cpukit/score/cpu/arm/arm-context-volatile-clobber.S new file mode 100644 index 0000000000..b79e570a79 --- /dev/null +++ b/cpukit/score/cpu/arm/arm-context-volatile-clobber.S @@ -0,0 +1,37 @@ +/* + * Copyright (c) 2013 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + */ + +#ifdef HAVE_CONFIG_H + #include "config.h" +#endif + +#include <rtems/asm.h> + + .section .text + +FUNCTION_THUMB_ENTRY(_CPU_Context_volatile_clobber) + +.macro clobber_register reg + sub r0, r0, #1 + mov \reg, r0 +.endm + + clobber_register r1 + clobber_register r2 + clobber_register r3 + clobber_register r12 + + bx lr + +FUNCTION_END(_CPU_Context_volatile_clobber) |