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Justin C. Miller
87a7293ac1
Improve the j6stack command in two ways: first, swap the order of the arguments, as depth is much more likely to be changed. Second, on any exception accessing memory in the stack, print the exception and continue instead of failing the whole command.
64 lines
1.6 KiB
Python
64 lines
1.6 KiB
Python
import gdb
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class PrintStackCommand(gdb.Command):
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def __init__(self):
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super().__init__("j6stack", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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args = gdb.string_to_argv(arg)
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base = "$rsp"
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if len(args) > 0:
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base = args[0]
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depth = 22
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if len(args) > 1:
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depth = int(args[1])
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for i in range(depth-1, -1, -1):
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try:
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offset = i * 8
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base_addr = gdb.parse_and_eval(base)
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value = gdb.parse_and_eval(f"*(uint64_t*)({base} + {offset})")
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print("{:016x} (+{:04x}): {:016x}".format(int(base_addr) + offset, offset, int(value)))
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except Exception as e:
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print(e)
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continue
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class PrintBacktraceCommand(gdb.Command):
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def __init__(self):
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super().__init__("j6bt", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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args = gdb.string_to_argv(arg)
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depth = 30
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if len(args) > 0:
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depth = int(args[0])
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frame = "$rbp"
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if len(args) > 1:
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frame = args[1]
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for i in range(depth-1, -1, -1):
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ret = gdb.parse_and_eval(f"*(uint64_t*)({frame} + 8)")
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frame = gdb.parse_and_eval(f"*(uint64_t*)({frame})")
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name = ""
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block = gdb.block_for_pc(int(ret))
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if block:
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name = block.function or ""
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print("{:016x} {}".format(int(ret), name))
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if frame == 0 or ret == 0:
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return
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PrintStackCommand()
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PrintBacktraceCommand()
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gdb.execute("target remote :1234")
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gdb.execute("display/i $rip")
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