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[92.232.232.66]) by smtp.gmail.com with ESMTPSA id bg1sm28398065wjc.27.2016.01.20.03.16.26 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 20 Jan 2016 03:16:26 -0800 (PST) From: Kieran Bingham To: jan.kiszka@siemens.com Cc: Kieran Bingham , linux-kernel@vger.kernel.org, maxime.coquelin@st.com, peter.griffin@linaro.org, lee.jones@linaro.org Subject: [PATCH 3/5] scripts/gdb: Add io resource readers Date: Wed, 20 Jan 2016 11:15:48 +0000 Message-Id: <1453288550-4706-4-git-send-email-kieran.bingham@linaro.org> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1453288550-4706-1-git-send-email-kieran.bingham@linaro.org> References: <1453288550-4706-1-git-send-email-kieran.bingham@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provide iomem_resource and ioports_resource printers and command hooks Signed-off-by: Kieran Bingham --- These two readers are a useful extract of kernel information. This shows the power of having these commands in gdb/scripts as you can halt a kernel as it's booting and read these as the structures grow. It should be useful in the event that a kernel is not booting, you can identify what memory resources have been registered scripts/gdb/linux/proc.py | 57 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) -- 2.5.0 diff --git a/scripts/gdb/linux/proc.py b/scripts/gdb/linux/proc.py index 6e6709c1830c..d855b2fd9a06 100644 --- a/scripts/gdb/linux/proc.py +++ b/scripts/gdb/linux/proc.py @@ -39,3 +39,60 @@ class LxVersion(gdb.Command): gdb.write(gdb.parse_and_eval("linux_banner").string()) LxVersion() + + +# Resource Structure Printers +# /proc/iomem +# /proc/ioports + +def get_resources(resource, depth): + while resource: + yield resource, depth + + child = resource['child'] + if child: + for res, deep in get_resources(child, depth + 1): + yield res, deep + + resource = resource['sibling'] + + +def show_lx_resources(resource_str): + resource = gdb.parse_and_eval(resource_str) + width = 4 if resource['end'] < 0x10000 else 8 + # Iterate straight to the first child + for res, depth in get_resources(resource['child'], 0): + start = int(res['start']) + end = int(res['end']) + gdb.write(" " * depth * 2 + + "{0:0{1}x}-".format(start, width) + + "{0:0{1}x} : ".format(end, width) + + res['name'].string() + "\n") + + +class LxIOMem(gdb.Command): + """Identify the IO memory resource locations defined by the kernel + +Equivalent to cat /proc/iomem on a running target""" + + def __init__(self): + super(LxIOMem, self).__init__("lx-iomem", gdb.COMMAND_DATA) + + def invoke(self, arg, from_tty): + return show_lx_resources("iomem_resource") + +LxIOMem() + + +class LxIOPorts(gdb.Command): + """Identify the IO port resource locations defined by the kernel + +Equivalent to cat /proc/ioports on a running target""" + + def __init__(self): + super(LxIOPorts, self).__init__("lx-ioports", gdb.COMMAND_DATA) + + def invoke(self, arg, from_tty): + return show_lx_resources("ioport_resource") + +LxIOPorts()