wayling

0000000000007120 <_ZN3aaa10build_user17h6ef656f427941943E>:
    7120:       55                      push   rbp
    7121:       48 89 e5                mov    rbp,rsp
    7124:       48 89 f8                mov    rax,rdi
    7127:       c7 47 10 64 00 00 00    mov    DWORD PTR [rdi+0x10],0x64
    712e:       48 c7 07 65 00 00 00    mov    QWORD PTR [rdi],0x65
    7135:       48 c7 47 08 66 00 00    mov    QWORD PTR [rdi+0x8],0x66
    713c:       00
    713d:       5d                      pop    rbp
    713e:       c3                      ret

wayling

#include <stdio.h>
#include <sched.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

#define DATA_SIZE 0x80000000

wayling

qemu-system-aarch64 -M virt -cpu cortex-a57 -nographic -smp 1 -kernel output/images/Image -append "console=ttyAMA0 memblock=debug" -netdev user,id=eth0 -device virtio-net-device,netdev=eth0 
Booting Linux on physical CPU 0x0
Linux version 4.11.3 (wayling@wayling-MacBookPro) (gcc version 6.3.0 (Buildroot 2017.08-git-00449-g773e8b5) ) #2 SMP Wed Jun 14 23:11:40 CST 2017
Boot CPU: AArch64 Processor [411fd070]
efi: Getting EFI parameters from FDT:
efi: UEFI not found.
memblock_reserve: [0x0000000040080000-0x0000000040744fff] arm64_memblock_init+0x158/0x1e0
memblock_reserve: [0x0000000047fff000-0x0000000047ffffff] memblock_alloc_range_nid+0x5c/0x74
memblock_reserve: [0x0000000047ffe000-0x0000000047ffefff] memblock_alloc_range_nid+0x5c/0x74
memblock_reserve: [0x0000000047ffd000-0x0000000047ffdfff] memblock_alloc_range_nid+0x5c/0x74

wayling

//g++-7 -std=c++1z -o test 1.cpp -latomic

#include <iostream>
#include <utility>
#include <atomic>
 
struct A { int a[100]; };
struct B { int x, y; };
struct C { int b[2]; };
struct D { char c,d; };

wayling

gcc -g -O0 -o thread-ex ex1.c -Wall -Werror -lpthread
   0x000000000040071a <+84>:	mov    0x200934(%rip),%eax # 0x601054 <global_val>
   0x0000000000400720 <+90>:	cmp    $0x1,%eax
   0x0000000000400723 <+93>:	jne    0x40071a <main+84>
   
   
gcc -g -O1 -o thread-ex ex1.c -Wall -Werror -lpthread
   0x000000000040075c <+76>:	mov    0x2008f2(%rip),%eax  # 0x601054 <global_val>
   0x0000000000400762 <+82>:	cmp    $0x1,%eax
   0x0000000000400765 <+85>:	jne    0x400762 <main+82>

wayling

/*
 * This is useful to dump out the page tables associated with
 * 'addr' in mm 'mm'.
 */
void show_pte(struct mm_struct *mm, unsigned long addr)
{
	pgd_t *pgd;

	if (!mm)
		mm = &init_mm;

wayling

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/uaccess.h>
static int pid_mem = 1;

static int mm_exp_load(void){
        struct task_struct *task;

wayling

ELF Header:
  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           ARM
  Version:                           0x1

wayling

/* longjmp for i386.
   Copyright (C) 1995-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

wayling

#include <stdio.h>
#include <stdlib.h>

static void __attribute__((constructor)) before_main1(void)
{
	printf("Before main1\n");
}

static void __attribute__((constructor)) before_main2(void)
{