From 97cff249d6730de7aa50fa06016fa1de1f587647 Mon Sep 17 00:00:00 2001
From: Mitchel Humpherys <mitchelh@codeaurora.org>
Date: Wed, 9 Apr 2014 15:16:55 -0700
Subject: [PATCH] lrdp-v2: add hexdump functions
It's useful to be able to dump regions of memory a la `xxd'. Add some
machinery to parser_util and RamDump to do this.
Example:
$ ramparse.py -a . -o parsed --shell
>>> dump.hexdump(0, 100, virtual=False)
00000000: fffe ffde 0200 0000 ffff b7bf adf5 a5ff ................
00000010: e7bf edfe c6fe edf6 fefa fffe befa fefe ................
00000020: bfbe ffef aebd a5ef ffff 7f7e fefe 5afb ...........~..Z.
00000030: 1b00 2000 3300 4300 1c00 2100 3400 4800 .. .3.C...!.4.H.
00000040: ffff ff7f fafe ffdb effd a5af adf5 a5bf ................
00000050: 4444 4444 4444 4444 4444 4444 4444 4444 DDDDDDDDDDDDDDDD
00000060: 5fff ffff _...
>>> dump.hexdump(0xc0000000, 100, virtual=True)
c0000000: fffe ffde 0200 0000 ffff b7bf adf5 a5ff ................
c0000010: e7bf edfe c6fe edf6 fefa fffe befa fefe ................
c0000020: bfbe ffef aebd a5ef ffff 7f7e fefe 5afb ...........~..Z.
c0000030: 1b00 2000 3300 4300 1c00 2100 3400 4800 .. .3.C...!.4.H.
c0000040: ffff ff7f fafe ffdb effd a5af adf5 a5bf ................
c0000050: 4444 4444 4444 4444 4444 4444 4444 4444 DDDDDDDDDDDDDDDD
c0000060: 5fff ffff _...
>>> dump.hexdump(dump.addr_lookup('linux_banner'), 144, virtual=True)
c0b0006a: 4c69 6e75 7820 7665 7273 696f 6e20 332e Linux version 3.
c0b0007a: 3130 2e32 382d 6765 3232 3362 6632 3830 10.28-ge223bf280
c0b0008a: 662d 6469 7274 7920 286d 6974 6368 656c f-dirty (mitchel
c0b0009a: 6840 6d69 7463 6865 6c68 2d6c 696e 7578 h@mitchelh-linux
c0b000aa: 2920 2867 6363 2076 6572 7369 6f6e 2034 ) (gcc version 4
c0b000ba: 2e37 2028 4743 4329 2029 2023 3720 534d .7 (GCC) ) #7 SM
c0b000ca: 5020 5052 4545 4d50 5420 5475 6520 4170 P PREEMPT Tue Ap
c0b000da: 7220 3820 3134 3a32 303a 3132 2050 4454 r 8 14:20:12 PDT
c0b000ea: 2032 3031 340a 007c 2f2d 5c00 0000 0000 2014..|/-\.....
Change-Id: Iecaf80f72845f052085a60eadedd2bb24743224c
---
linux-ramdump-parser-v2/parser_util.py | 47 +++++++++++++++++++++++++-
linux-ramdump-parser-v2/ramdump.py | 16 +++++++--
2 files changed, 60 insertions(+), 3 deletions(-)
diff --git a/linux-ramdump-parser-v2/parser_util.py b/linux-ramdump-parser-v2/parser_util.py
index ae2449b..040f374 100644
--- a/linux-ramdump-parser-v2/parser_util.py
+++ b/linux-ramdump-parser-v2/parser_util.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2013, The Linux Foundation. All rights reserved.
+# Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 and
@@ -14,6 +14,7 @@ import platform
import glob
import re
import string
+import sys
_parsers = []
@@ -160,3 +161,47 @@ def get_system_type():
return 'Linux'
if plat == 'Darwin':
return 'Darwin'
+
+def _get_printable(n, fillchar='.'):
+ if n is None:
+ return
+ c = chr(n)
+ if c in string.printable[:string.printable.index(' ') + 1]:
+ return c
+ return fillchar
+
+def _xxd_line(addr, data):
+ printable = [_get_printable(d) for d in data]
+ data = ['{:02x}'.format(d) for d in data]
+ printable += [' '] * (16 - len(printable))
+ data += [' '] * (16 - len(data))
+ return "{:08x}: {:}{:} {:}{:} {:}{:} {:}{:} {:}{:} {:}{:} {:}{:} {:}{:} {:}{:}{:}{:}{:}{:}{:}{:}{:}{:}{:}{:}{:}{:}{:}{:}\n".format(
+ addr, *(data + printable)
+ )
+
+def xxd(address, data, file_object=None):
+ """Dumps data to stdout, in the format of `xxd'. data should be a list
+ of integers.
+
+ >>> xxd(0x1000, [0xde, 0xad, 0xbe, 0xef, 112, 105, 122, 122, 97, 0, 0, 42, 43, 44, 45, 90])
+ 00001000: dead beef 7069 7a7a 6100 002a 2b2c 2d5a ....pizza..*+,-Z
+
+ """
+ f = file_object or sys.stdout
+ bb = []
+ n = 0
+ for i in data:
+ bb.append(i)
+ if n == 15:
+ f.write(_xxd_line(address, bb))
+ bb = []
+ n = 0
+ address += 16
+ else:
+ n += 1
+ if len(bb):
+ f.write(_xxd_line(address, bb))
+
+if __name__ == "__main__":
+ import doctest
+ doctest.testmod()
diff --git a/linux-ramdump-parser-v2/ramdump.py b/linux-ramdump-parser-v2/ramdump.py
index a24d364..8410eff 100644
--- a/linux-ramdump-parser-v2/ramdump.py
+++ b/linux-ramdump-parser-v2/ramdump.py
@@ -22,7 +22,7 @@ from tempfile import NamedTemporaryFile
import gdbmi
from print_out import print_out_str
from mmu import Armv7MMU, Armv7LPAEMMU, Armv8MMU
-from parser_util import cleanupString
+import parser_util
FP = 11
SP = 13
@@ -975,7 +975,7 @@ class RamDump():
ebi[0].seek(offset)
a = ebi[0].read(length)
if trace:
- print_out_str('result = {0}'.format(cleanupString(a)))
+ print_out_str('result = {0}'.format(parser_util.cleanupString(a)))
print_out_str('lenght = {0}'.format(len(a)))
return a
@@ -1089,6 +1089,18 @@ class RamDump():
return None
return struct.unpack(format_string, s)
+ def hexdump(self, address, length, virtual=True, file_object=None):
+ """Does a hexdump (in the format of `xxd'). `length' is in bytes. If
+ given, will write to `file_object', otherwise will write to
+ stdout.
+
+ """
+ parser_util.xxd(
+ address,
+ [self.read_byte(address + i, virtual=virtual) or 0
+ for i in xrange(length)],
+ file_object=file_object)
+
def per_cpu_offset(self, cpu):
per_cpu_offset_addr = self.addr_lookup('__per_cpu_offset')
if per_cpu_offset_addr is None:
--
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