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linux_old1/arch/arm/kernel/insn.h

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ARM: 7331/1: extract out insn generation code from ftrace Extract out the instruction generation code so that it can be used for jump labels too. Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-19 00:50:06 +08:00
#ifndef __ASM_ARM_INSN_H
#define __ASM_ARM_INSN_H
ARM: 7334/1: add jump label support Add the arch-specific code to support jump labels for ARM and Thumb-2. This code will only be activated on compilers that are capable of building it. It has been tested with GCC 4.6 patched with the patch from GCC bug 48637. Cc: Jason Baron <jbaron@redhat.com> Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-19 00:52:41 +08:00
static inline unsigned long
arm_gen_nop(void)
{
#ifdef CONFIG_THUMB2_KERNEL
return 0xf3af8000; /* nop.w */
#else
return 0xe1a00000; /* mov r0, r0 */
#endif
}
ARM: 7331/1: extract out insn generation code from ftrace Extract out the instruction generation code so that it can be used for jump labels too. Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-19 00:50:06 +08:00
unsigned long
__arm_gen_branch(unsigned long pc, unsigned long addr, bool link);
static inline unsigned long
arm_gen_branch(unsigned long pc, unsigned long addr)
{
return __arm_gen_branch(pc, addr, false);
}
static inline unsigned long
arm_gen_branch_link(unsigned long pc, unsigned long addr)
{
return __arm_gen_branch(pc, addr, true);
}
#endif