get_dev_mem.stp

#! /usr/bin/env stap

# Usage: ./get_dev_mem.stp -g <pfn>

%{
#include "../../../arch/x86/include/asm/page_64.h"
#include "../../../arch/x86/include/asm/io.h"
%}

function get_dev_mem (addr:long) %{
        unsigned long addr = (unsigned long)STAP_ARG_addr << 12;
        unsigned long virt;
        unsigned long tmp = 0;

        virt = (unsigned long)phys_to_virt(addr);
        for (; tmp < 4096; tmp = tmp + 32) {
                _stp_printf("0x%lx %lx %lx %lx %lx\n", addr + tmp,
                                *(unsigned long *)(virt + tmp),
                                *(unsigned long *)(virt + tmp + 8),
                                *(unsigned long *)(virt + tmp + 16),
                                *(unsigned long*)(virt + tmp + 24));
        }
%}

probe begin {
        get_dev_mem($1)
        exit();
}