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
  10 class QemuController:
  11     def __init__(self, kernel):
  12         args = launch_args + ['-kernel', kernel]
  13         self.qemu_popen = subprocess.Popen(args,
  14                                            stdout=subprocess.PIPE,
  15                                            stdin=subprocess.PIPE)
  16         self.gdb = GdbController(gdb_path='powerpc64-linux-gnu-gdb')
  17
  18     def __enter__(self):
  19         return self
  20
  21     def __exit__(self, type, value, traceback):
  22         self.exit()
  23
  24     def connect(self):
  25         return self.gdb.write('-target-select remote localhost:1234')
  26
  27     def break_address(self, addr):
  28         cmd = '-break-insert *0x{:x}'.format(addr)
  29         return self.gdb.write(cmd)
  30
  31     def get_registers(self):
  32         return self.gdb.write('-data-list-register-values x')
  33
  34     def get_register(self, num):
  35         res = self.gdb.write('-data-list-register-values x {}'.format(num))
  36         assert 'register-values' in res[0]['payload']
  37         val = int(res[0]['payload']['register-values'][0]['value'], 0)
  38         return val
  39
  40     def step(self):
  41         return self.gdb.write('-exec-next-instruction')
  42
  43     def gdb_continue(self):
  44         return self.gdb.write('-exec-continue')
  45
  46     def exit(self):
  47         self.gdb.exit()
  48         self.qemu_popen.kill()
  49         outs, errs = self.qemu_popen.communicate()
  50         self.qemu_popen.stdout.close()
  51         self.qemu_popen.stdin.close()
  52
  53
  54 def run_program(program):
  55     q = QemuController(program.binfile.name)
  56     q.connect()
  57     q.break_address(0x20000000 + program.size())
  58     q.gdb_continue()
  59     return q
  60
  61
  62 if __name__ == '__main__':
  63     q = QemuController("qemu_test/kernel.bin")
  64     q.connect()
  65     q.break_address(0x20000000)
  66     q.gdb_continue()
  67     print(q.get_register(1))
  68     print(q.step())
  69     print(q.get_register(1))
  70     q.exit()