How to access BIOS ROM binary from linux shell -


i want binary code in rom, made general file in linux. how it. , memory address rom accessed?

it possible read rom bios content.

  • when code not under protected mode os linux
  • for example, when in boot mode. @ time rom bios content in memory @ 0x000f0000 address - take @ ibm pc system architecture memory map: http://wiki.osdev.org/memory_map_(x86). can copy need right memory.

if need rom bios content study, can use bios dump utilities - there lot of them.

you can check utility biosdenter link description hereecode

check utility flashrom. provided system supported, can read bios content issuing

flashrom -r outputfile

another utility dmidecode

dmidecode -t bios

read memory c:0000 f:ffff without need dmidecode

sample command:

dd if=/dev/mem bs=1k skip=768  count=256 2>/dev/null | strings -n 8

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