我知道ulimit -s无限制的技巧(修复libc的地址)但是我不明白背后的事实,任何人都可以帮我解释一下？〜

谢谢 最佳答案 根据bash手册页

ulimit provides control over the resources available to the shell and to processes started by it, on systems that allow such control.

-s标志定义最大堆栈大小.

所以ulimit -s unlimited删除了堆栈大小的最大限制,这启用了传统的mmap功能.

根据Hexcellent

On 32 bit systems “ulimit -s unlimited” disables the randomization of the mmap()-ing because of the following code in the kernel at arch/x86/mm/mmap.c:

static int mmap_is_legacy(void)
{
    if (current->personality & ADDR_COMPAT_LAYOUT)
            return 1;

    if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
            return 1;

    return sysctl_legacy_va_layout;
}