TRIMUI SMART

dump kernel from memory

/proc/iomem 

# cat /proc/iomem
    01c02000-01c024dc : sunxi_dmac
    01c0f000-01c0ffff : sunxi-mmc
    01c10000-01c10fff : sunxi-mmc
    01c11000-01c11fff : sunxi-mmc
    01c28000-01c283ff : uart
    01c28400-01c287ff : uart
    01c28800-01c28bff : uart
    01c2b000-01c2b3ff : twi.1
      01c2b000-01c2b3ff : twi.1
    01c68000-01c68fff : spi.0
      01c68000-01c68fff : spi
    40000000-47ffffff : System RAM
      40008000-40660fff : Kernel code
      40686000-4072c1af : Kernel data
    f1000000-f1200000 : de
    f1c0c000-f1c0c3fc : lcd0

main.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <time.h>
  
int main(int argc, char* argv[])
{
    int md = open("/dev/mem", O_RDWR);
    void *mem = mmap(0, 0x800000, PROT_READ | PROT_WRITE, MAP_SHARED, md, 0x40000000);
    int kd = open("kernel.mem", O_RDWR | O_CREAT);
    write(kd, mem, 0x800000);
    close(kd);
    close(md);
    return 0;
}

/proc/kallsym 

# cat /proc/kallsym
    c000a000 T asm_do_IRQ
    c000a000 T _stext
    c000a000 T __exception_text_start
    c000a014 T do_undefinstr
    c000a168 T do_DataAbort
    c000a20c T do_PrefetchAbort
    c000a2b0 T gic_handle_irq

0x4000a000 = 0xc000a000


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