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author | Joshua Lock <josh@linux.intel.com> | 2010-04-30 16:35:50 +0100 |
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committer | Joshua Lock <josh@linux.intel.com> | 2010-05-06 12:48:05 +0100 |
commit | ac023d775b651c9b1e28a7a725e72949fe54ad47 (patch) | |
tree | da69e91c7d2ce4785ddf6af6b756758d1789d5a2 /meta/lib/oe/qa.py | |
parent | 14196cb03190d9dac93be309763e3076385eb831 (diff) | |
download | poky-ac023d775b651c9b1e28a7a725e72949fe54ad47.tar.gz |
lib/oe: Import oe lib from OE.dev
This library moves the common Python methods into modules of an 'oe' Python
package.
Signed-off-by: Joshua Lock <josh@linux.intel.com>
Diffstat (limited to 'meta/lib/oe/qa.py')
-rw-r--r-- | meta/lib/oe/qa.py | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/meta/lib/oe/qa.py b/meta/lib/oe/qa.py new file mode 100644 index 0000000000..01813931bb --- /dev/null +++ b/meta/lib/oe/qa.py | |||
@@ -0,0 +1,76 @@ | |||
1 | class ELFFile: | ||
2 | EI_NIDENT = 16 | ||
3 | |||
4 | EI_CLASS = 4 | ||
5 | EI_DATA = 5 | ||
6 | EI_VERSION = 6 | ||
7 | EI_OSABI = 7 | ||
8 | EI_ABIVERSION = 8 | ||
9 | |||
10 | # possible values for EI_CLASS | ||
11 | ELFCLASSNONE = 0 | ||
12 | ELFCLASS32 = 1 | ||
13 | ELFCLASS64 = 2 | ||
14 | |||
15 | # possible value for EI_VERSION | ||
16 | EV_CURRENT = 1 | ||
17 | |||
18 | # possible values for EI_DATA | ||
19 | ELFDATANONE = 0 | ||
20 | ELFDATA2LSB = 1 | ||
21 | ELFDATA2MSB = 2 | ||
22 | |||
23 | def my_assert(self, expectation, result): | ||
24 | if not expectation == result: | ||
25 | #print "'%x','%x' %s" % (ord(expectation), ord(result), self.name) | ||
26 | raise Exception("This does not work as expected") | ||
27 | |||
28 | def __init__(self, name, bits32): | ||
29 | self.name = name | ||
30 | self.bits32 = bits32 | ||
31 | |||
32 | def open(self): | ||
33 | self.file = file(self.name, "r") | ||
34 | self.data = self.file.read(ELFFile.EI_NIDENT+4) | ||
35 | |||
36 | self.my_assert(len(self.data), ELFFile.EI_NIDENT+4) | ||
37 | self.my_assert(self.data[0], chr(0x7f) ) | ||
38 | self.my_assert(self.data[1], 'E') | ||
39 | self.my_assert(self.data[2], 'L') | ||
40 | self.my_assert(self.data[3], 'F') | ||
41 | if self.bits32 : | ||
42 | self.my_assert(self.data[ELFFile.EI_CLASS], chr(ELFFile.ELFCLASS32)) | ||
43 | else: | ||
44 | self.my_assert(self.data[ELFFile.EI_CLASS], chr(ELFFile.ELFCLASS64)) | ||
45 | self.my_assert(self.data[ELFFile.EI_VERSION], chr(ELFFile.EV_CURRENT) ) | ||
46 | |||
47 | self.sex = self.data[ELFFile.EI_DATA] | ||
48 | if self.sex == chr(ELFFile.ELFDATANONE): | ||
49 | raise Exception("self.sex == ELFDATANONE") | ||
50 | elif self.sex == chr(ELFFile.ELFDATA2LSB): | ||
51 | self.sex = "<" | ||
52 | elif self.sex == chr(ELFFile.ELFDATA2MSB): | ||
53 | self.sex = ">" | ||
54 | else: | ||
55 | raise Exception("Unknown self.sex") | ||
56 | |||
57 | def osAbi(self): | ||
58 | return ord(self.data[ELFFile.EI_OSABI]) | ||
59 | |||
60 | def abiVersion(self): | ||
61 | return ord(self.data[ELFFile.EI_ABIVERSION]) | ||
62 | |||
63 | def isLittleEndian(self): | ||
64 | return self.sex == "<" | ||
65 | |||
66 | def isBigEngian(self): | ||
67 | return self.sex == ">" | ||
68 | |||
69 | def machine(self): | ||
70 | """ | ||
71 | We know the sex stored in self.sex and we | ||
72 | know the position | ||
73 | """ | ||
74 | import struct | ||
75 | (a,) = struct.unpack(self.sex+"H", self.data[18:20]) | ||
76 | return a | ||