cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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exec.c (1199B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
      4 */
      5
      6#include <linux/stddef.h>
      7#include <linux/module.h>
      8#include <linux/fs.h>
      9#include <linux/ptrace.h>
     10#include <linux/sched/mm.h>
     11#include <linux/sched/task.h>
     12#include <linux/sched/task_stack.h>
     13#include <linux/slab.h>
     14#include <asm/current.h>
     15#include <asm/processor.h>
     16#include <linux/uaccess.h>
     17#include <as-layout.h>
     18#include <mem_user.h>
     19#include <registers.h>
     20#include <skas.h>
     21#include <os.h>
     22
     23void flush_thread(void)
     24{
     25	void *data = NULL;
     26	int ret;
     27
     28	arch_flush_thread(&current->thread.arch);
     29
     30	ret = unmap(&current->mm->context.id, 0, TASK_SIZE, 1, &data);
     31	if (ret) {
     32		printk(KERN_ERR "flush_thread - clearing address space failed, "
     33		       "err = %d\n", ret);
     34		force_sig(SIGKILL);
     35	}
     36	get_safe_registers(current_pt_regs()->regs.gp,
     37			   current_pt_regs()->regs.fp);
     38
     39	__switch_mm(&current->mm->context.id);
     40}
     41
     42void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
     43{
     44	PT_REGS_IP(regs) = eip;
     45	PT_REGS_SP(regs) = esp;
     46	clear_thread_flag(TIF_SINGLESTEP);
     47#ifdef SUBARCH_EXECVE1
     48	SUBARCH_EXECVE1(regs->regs);
     49#endif
     50}
     51EXPORT_SYMBOL(start_thread);