arch/x86/um/asm/processor.h at v4.15 · tjh.dev/kernel

tjh.dev / kernel

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

kernel / arch / x86 / um / asm / processor.h

at v4.15 35 lines 808 B view raw

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __UM_PROCESSOR_H
 3#define __UM_PROCESSOR_H
 4
 5/* include faultinfo structure */
 6#include <sysdep/faultinfo.h>
 7
 8#ifdef CONFIG_X86_32
 9# include "processor_32.h"
10#else
11# include "processor_64.h"
12#endif
13
14#define KSTK_EIP(tsk) KSTK_REG(tsk, HOST_IP)
15#define KSTK_ESP(tsk) KSTK_REG(tsk, HOST_SP)
16#define KSTK_EBP(tsk) KSTK_REG(tsk, HOST_BP)
17
18#define ARCH_IS_STACKGROW(address) \
19       (address + 65536 + 32 * sizeof(unsigned long) >= UPT_SP(&current->thread.regs.regs))
20
21#include <asm/user.h>
22
23/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
24static inline void rep_nop(void)
25{
26	__asm__ __volatile__("rep;nop": : :"memory");
27}
28
29#define cpu_relax()		rep_nop()
30
31#define task_pt_regs(t) (&(t)->thread.regs)
32
33#include <asm/processor-generic.h>
34
35#endif