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Commit 2678aba9 authored by px4dev's avatar px4dev
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A bit more NuttX gdb/python tooling to recover an interrupted context. Needs more fleshing out.

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Debug/Nuttx.py
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......@@ -2,6 +2,106 @@
import gdb, gdb.types
class NX_register_set(object):
"""Copy of the registers for a given context"""
v7_regmap = {
'R13': 0,
'SP': 0,
'PRIORITY': 1,
'R4': 2,
'R5': 3,
'R6': 4,
'R7': 5,
'R8': 6,
'R9': 7,
'R10': 8,
'R11': 9,
'EXC_RETURN': 10,
'R0': 11,
'R1': 12,
'R2': 13,
'R3': 14,
'R12': 15,
'R14': 16,
'LR': 16,
'R15': 17,
'PC': 17,
'XPSR': 18,
}
v7em_regmap = {
'R13': 0,
'SP': 0,
'PRIORITY': 1,
'R4': 2,
'R5': 3,
'R6': 4,
'R7': 5,
'R8': 6,
'R9': 7,
'R10': 8,
'R11': 9,
'EXC_RETURN': 10,
'R0': 27,
'R1': 28,
'R2': 29,
'R3': 30,
'R12': 31,
'R14': 32,
'LR': 32,
'R15': 33,
'PC': 33,
'XPSR': 34,
}
regs = dict()
def __init__(self, xcpt_regs):
if xcpt_regs is None:
self.regs['R0'] = long(gdb.parse_and_eval('$r0'))
self.regs['R1'] = long(gdb.parse_and_eval('$r1'))
self.regs['R2'] = long(gdb.parse_and_eval('$r2'))
self.regs['R3'] = long(gdb.parse_and_eval('$r3'))
self.regs['R4'] = long(gdb.parse_and_eval('$r4'))
self.regs['R5'] = long(gdb.parse_and_eval('$r5'))
self.regs['R6'] = long(gdb.parse_and_eval('$r6'))
self.regs['R7'] = long(gdb.parse_and_eval('$r7'))
self.regs['R8'] = long(gdb.parse_and_eval('$r8'))
self.regs['R9'] = long(gdb.parse_and_eval('$r9'))
self.regs['R10'] = long(gdb.parse_and_eval('$r10'))
self.regs['R11'] = long(gdb.parse_and_eval('$r11'))
self.regs['R12'] = long(gdb.parse_and_eval('$r12'))
self.regs['R13'] = long(gdb.parse_and_eval('$r13'))
self.regs['SP'] = long(gdb.parse_and_eval('$sp'))
self.regs['R14'] = long(gdb.parse_and_eval('$r14'))
self.regs['LR'] = long(gdb.parse_and_eval('$lr'))
self.regs['R15'] = long(gdb.parse_and_eval('$r15'))
self.regs['PC'] = long(gdb.parse_and_eval('$pc'))
self.regs['XPSR'] = long(gdb.parse_and_eval('$xpsr'))
else:
for key in self.v7em_regmap.keys():
self.regs[key] = int(xcpt_regs[self.v7em_regmap[key]])
@classmethod
def with_xcpt_regs(cls, xcpt_regs):
return cls(xcpt_regs)
@classmethod
def for_current(cls):
return cls(None)
def __format__(self, format_spec):
return format_spec.format(
registers = self.registers
)
@property
def registers(self):
return self.regs
class NX_task(object):
"""Reference to a NuttX task and methods for introspecting it"""
......@@ -139,56 +239,12 @@ class NX_task(object):
if 'registers' not in self.__dict__:
registers = dict()
if self._state_is('TSTATE_TASK_RUNNING'):
# XXX need to fix this to handle interrupt context
registers['R0'] = long(gdb.parse_and_eval('$r0'))
registers['R1'] = long(gdb.parse_and_eval('$r1'))
registers['R2'] = long(gdb.parse_and_eval('$r2'))
registers['R3'] = long(gdb.parse_and_eval('$r3'))
registers['R4'] = long(gdb.parse_and_eval('$r4'))
registers['R5'] = long(gdb.parse_and_eval('$r5'))
registers['R6'] = long(gdb.parse_and_eval('$r6'))
registers['R7'] = long(gdb.parse_and_eval('$r7'))
registers['R8'] = long(gdb.parse_and_eval('$r8'))
registers['R9'] = long(gdb.parse_and_eval('$r9'))
registers['R10'] = long(gdb.parse_and_eval('$r10'))
registers['R11'] = long(gdb.parse_and_eval('$r11'))
registers['R12'] = long(gdb.parse_and_eval('$r12'))
registers['R13'] = long(gdb.parse_and_eval('$r13'))
registers['SP'] = long(gdb.parse_and_eval('$sp'))
registers['R14'] = long(gdb.parse_and_eval('$r14'))
registers['LR'] = long(gdb.parse_and_eval('$lr'))
registers['R15'] = long(gdb.parse_and_eval('$r15'))
registers['PC'] = long(gdb.parse_and_eval('$pc'))
registers['XPSR'] = long(gdb.parse_and_eval('$xpsr'))
# this would only be valid if we were in an interrupt
registers['EXC_RETURN'] = 0
# we should be able to get this...
registers['PRIMASK'] = 0
registers = NX_register_set.for_current().registers
else:
context = self._tcb['xcp']
regs = context['regs']
registers['R0'] = long(regs[27])
registers['R1'] = long(regs[28])
registers['R2'] = long(regs[29])
registers['R3'] = long(regs[30])
registers['R4'] = long(regs[2])
registers['R5'] = long(regs[3])
registers['R6'] = long(regs[4])
registers['R7'] = long(regs[5])
registers['R8'] = long(regs[6])
registers['R9'] = long(regs[7])
registers['R10'] = long(regs[8])
registers['R11'] = long(regs[9])
registers['R12'] = long(regs[31])
registers['R13'] = long(regs[0])
registers['SP'] = long(regs[0])
registers['R14'] = long(regs[32])
registers['LR'] = long(regs[32])
registers['R15'] = long(regs[33])
registers['PC'] = long(regs[33])
registers['XPSR'] = long(regs[34])
registers['EXC_RETURN'] = long(regs[10])
registers['PRIMASK'] = long(regs[1])
registers = NX_register_set.with_xcpt_regs(regs).registers
self.__dict__['registers'] = registers
return self.__dict__['registers']
......@@ -267,8 +323,7 @@ class NX_show_heap (gdb.Command):
def _print_allocations(self, region_start, region_end):
if region_start >= region_end:
print 'heap region {} corrupt'.format(hex(region_start))
return
raise gdb.GdbError('heap region {} corrupt'.format(hex(region_start)))
nodecount = region_end - region_start
print 'heap {} - {}'.format(region_start, region_end)
cursor = 1
......@@ -286,13 +341,31 @@ class NX_show_heap (gdb.Command):
nregions = heap['mm_nregions']
region_starts = heap['mm_heapstart']
region_ends = heap['mm_heapend']
print "{} heap(s)".format(nregions)
print '{} heap(s)'.format(nregions)
# walk the heaps
for i in range(0, nregions):
self._print_allocations(region_starts[i], region_ends[i])
NX_show_heap()
class NX_show_interrupted_thread (gdb.Command):
"""(NuttX) prints the register state of an interrupted thread when in interrupt/exception context"""
def __init__(self):
super(NX_show_interrupted_thread, self).__init__('show interrupted-thread', gdb.COMMAND_USER)
def invoke(self, args, from_tty):
regs = gdb.lookup_global_symbol('current_regs').value()
if regs is 0:
raise gdb.GdbError('not in interrupt context')
else:
registers = NX_register_set.with_xcpt_regs(regs)
my_fmt = ''
my_fmt += ' R0 {registers[R0]:#010x} {registers[R1]:#010x} {registers[R2]:#010x} {registers[R3]:#010x}\n'
my_fmt += ' R4 {registers[R4]:#010x} {registers[R5]:#010x} {registers[R6]:#010x} {registers[R7]:#010x}\n'
my_fmt += ' R8 {registers[R8]:#010x} {registers[R9]:#010x} {registers[R10]:#010x} {registers[R11]:#010x}\n'
my_fmt += ' R12 {registers[PC]:#010x}\n'
my_fmt += ' SP {registers[SP]:#010x} LR {registers[LR]:#010x} PC {registers[PC]:#010x} XPSR {registers[XPSR]:#010x}\n'
print format(registers, my_fmt)
NX_show_interrupted_thread()
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