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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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fad1c45c93
The old code had the IP and SP coming from the registers in the thread struct, which are completely wrong since those are the userspace registers. This fixes that by pulling the correct values from the jmp_buf in which the kernel state of each thread is stored. Signed-off-by: Allan Graves <allan.graves@oracle.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#ifndef __UM_PROCESSOR_I386_H
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#define __UM_PROCESSOR_I386_H
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extern int host_has_xmm;
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extern int host_has_cmov;
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/* include faultinfo structure */
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#include "sysdep/faultinfo.h"
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struct arch_thread {
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unsigned long debugregs[8];
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int debugregs_seq;
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struct faultinfo faultinfo;
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};
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#define INIT_ARCH_THREAD { .debugregs = { [ 0 ... 7 ] = 0 }, \
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.debugregs_seq = 0, \
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.faultinfo = { 0, 0, 0 } }
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#include "asm/arch/user.h"
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/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
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static inline void rep_nop(void)
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{
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__asm__ __volatile__("rep;nop": : :"memory");
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}
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#define cpu_relax() rep_nop()
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter"). Stolen
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* from asm-i386/processor.h
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*/
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#define current_text_addr() \
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({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
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#define ARCH_IS_STACKGROW(address) \
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(address + 32 >= UPT_SP(¤t->thread.regs.regs))
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#define KSTK_EIP(tsk) KSTK_REG(tsk, EIP)
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#define KSTK_ESP(tsk) KSTK_REG(tsk, UESP)
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#define KSTK_EBP(tsk) KSTK_REG(tsk, EBP)
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#include "asm/processor-generic.h"
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#endif
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