src/soc/simulator/qemu.py

   1 from pygdbmi.gdbcontroller import GdbController
   2 import subprocess
   3
   4 launch_args = ['qemu-system-ppc64',
   5                '-machine', 'powernv9',
   6                '-nographic',
   7                '-s', '-S']
   8
   9 class QemuController:
  10     def __init__(self, kernel):
  11         args = launch_args + ['-kernel', kernel]
  12         self.qemu_popen = subprocess.Popen(args,
  13                                            stdout=subprocess.PIPE,
  14                                            stdin=subprocess.PIPE)
  15         self.gdb = GdbController(gdb_path='powerpc64-linux-gnu-gdb')
  16
  17     def connect(self):
  18         return self.gdb.write('-target-select remote localhost:1234')
  19
  20     def break_address(self, addr):
  21         cmd = '-break-insert *0x{:x}'.format(addr)
  22         return self.gdb.write(cmd)
  23
  24     def get_registers(self):
  25         return self.gdb.write('-data-list-register-values x')
  26
  27     def get_register(self, num):
  28         return self.gdb.write('-data-list-register-values x {}'.format(num))
  29
  30     def step(self):
  31         return self.gdb.write('-exec-next-instruction')
  32
  33     def gdb_continue(self):
  34         return self.gdb.write('-exec-continue')
  35
  36     def exit(self):
  37         self.gdb.exit()
  38         self.qemu_popen.kill()
  39
  40
  41 if __name__ == '__main__':
  42     q = QemuController("qemu_test/kernel.bin")
  43     q.connect()
  44     q.break_address(0x20000000)
  45     q.gdb_continue()
  46     print(q.get_register(1))
  47     print(q.step())
  48     print(q.get_register(1))
  49     q.exit()
  50
  51