mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-25 03:01:36 +01:00
fe9c31f737
I'm sad no one reported qemu-monitor break, that one is kind of important. count.out arguments broke it as an init program, since the kernel adds trash parameters to every init. Is anyone using this repo, I wonder? Keep pushing, keep pushing. One day it gets good enough, and the whole world will see.
58 lines
1.9 KiB
Python
Executable File
58 lines
1.9 KiB
Python
Executable File
#!/usr/bin/env python3
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import common
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from shell_helpers import LF
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class Main(common.LkmcCliFunction):
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def __init__(self):
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super().__init__(
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description='''Trace the PIC addresses executed on a Linux kernel boot.
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More information at: https://github.com/cirosantilli/linux-kernel-module-cheat#tracing
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'''
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)
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def timed_main(self):
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args = self.get_common_args()
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run = common.import_path_main('run')
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if self.env['emulator'] == 'gem5':
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args['trace'] = 'Exec,-ExecSymbol,-ExecMicro'
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run(**args)
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elif self.env['emulator'] == 'qemu':
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run_args = args.copy()
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run_args['trace'] = 'exec_tb'
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run_args['quit_after_boot'] = True
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run(**run_args)
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qemu_trace2txt = common.import_path_main('qemu-trace2txt')
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qemu_trace2txt(**args)
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# Instruction count.
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# We could put this on a separate script, but it just adds more arch boilerplate to a new script.
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# So let's just leave it here for now since it did not add a significant processing time.
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kernel_entry_addr = hex(self.get_elf_entry(self.env['vmlinux']))
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nlines = 0
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nlines_firmware = 0
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with open(self.env['qemu_trace_txt_file'], 'r') as trace_file:
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in_firmware = True
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for line in trace_file:
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line = line.rstrip()
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nlines += 1
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pc = line.split('=')[-1]
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if pc == kernel_entry_addr:
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in_firmware = False
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if in_firmware:
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nlines_firmware += 1
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print('''\
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instructions {}
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entry_address {}
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instructions_firmware {}
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'''.format(
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nlines,
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kernel_entry_addr,
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nlines_firmware
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),
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end=''
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)
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if __name__ == '__main__':
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Main().cli()
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