99 lines
2.6 KiB
Python
99 lines
2.6 KiB
Python
#
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# gdb helper commands and functions for Linux kernel debugging
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#
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# Kernel proc information reader
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#
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# Copyright (c) 2016 Linaro Ltd
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#
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# Authors:
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# Kieran Bingham <kieran.bingham@linaro.org>
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#
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# This work is licensed under the terms of the GNU GPL version 2.
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#
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import gdb
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class LxCmdLine(gdb.Command):
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""" Report the Linux Commandline used in the current kernel.
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Equivalent to cat /proc/cmdline on a running target"""
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def __init__(self):
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super(LxCmdLine, self).__init__("lx-cmdline", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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gdb.write(gdb.parse_and_eval("saved_command_line").string() + "\n")
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LxCmdLine()
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class LxVersion(gdb.Command):
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""" Report the Linux Version of the current kernel.
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Equivalent to cat /proc/version on a running target"""
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def __init__(self):
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super(LxVersion, self).__init__("lx-version", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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# linux_banner should contain a newline
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gdb.write(gdb.parse_and_eval("linux_banner").string())
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LxVersion()
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# Resource Structure Printers
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# /proc/iomem
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# /proc/ioports
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def get_resources(resource, depth):
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while resource:
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yield resource, depth
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child = resource['child']
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if child:
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for res, deep in get_resources(child, depth + 1):
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yield res, deep
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resource = resource['sibling']
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def show_lx_resources(resource_str):
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resource = gdb.parse_and_eval(resource_str)
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width = 4 if resource['end'] < 0x10000 else 8
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# Iterate straight to the first child
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for res, depth in get_resources(resource['child'], 0):
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start = int(res['start'])
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end = int(res['end'])
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gdb.write(" " * depth * 2 +
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"{0:0{1}x}-".format(start, width) +
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"{0:0{1}x} : ".format(end, width) +
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res['name'].string() + "\n")
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class LxIOMem(gdb.Command):
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"""Identify the IO memory resource locations defined by the kernel
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Equivalent to cat /proc/iomem on a running target"""
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def __init__(self):
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super(LxIOMem, self).__init__("lx-iomem", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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return show_lx_resources("iomem_resource")
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LxIOMem()
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class LxIOPorts(gdb.Command):
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"""Identify the IO port resource locations defined by the kernel
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Equivalent to cat /proc/ioports on a running target"""
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def __init__(self):
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super(LxIOPorts, self).__init__("lx-ioports", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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return show_lx_resources("ioport_resource")
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LxIOPorts()
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