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-rw-r--r--meta/lib/oe/qa.py111
1 files changed, 111 insertions, 0 deletions
diff --git a/meta/lib/oe/qa.py b/meta/lib/oe/qa.py
new file mode 100644
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+++ b/meta/lib/oe/qa.py
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1class 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, bits = 0):
29 self.name = name
30 self.bits = bits
31 self.objdump_output = {}
32
33 def open(self):
34 self.file = file(self.name, "r")
35 self.data = self.file.read(ELFFile.EI_NIDENT+4)
36
37 self.my_assert(len(self.data), ELFFile.EI_NIDENT+4)
38 self.my_assert(self.data[0], chr(0x7f) )
39 self.my_assert(self.data[1], 'E')
40 self.my_assert(self.data[2], 'L')
41 self.my_assert(self.data[3], 'F')
42 if self.bits == 0:
43 if self.data[ELFFile.EI_CLASS] == chr(ELFFile.ELFCLASS32):
44 self.bits = 32
45 elif self.data[ELFFile.EI_CLASS] == chr(ELFFile.ELFCLASS64):
46 self.bits = 64
47 else:
48 # Not 32-bit or 64.. lets assert
49 raise Exception("ELF but not 32 or 64 bit.")
50 elif self.bits == 32:
51 self.my_assert(self.data[ELFFile.EI_CLASS], chr(ELFFile.ELFCLASS32))
52 elif self.bits == 64:
53 self.my_assert(self.data[ELFFile.EI_CLASS], chr(ELFFile.ELFCLASS64))
54 else:
55 raise Exception("Must specify unknown, 32 or 64 bit size.")
56 self.my_assert(self.data[ELFFile.EI_VERSION], chr(ELFFile.EV_CURRENT) )
57
58 self.sex = self.data[ELFFile.EI_DATA]
59 if self.sex == chr(ELFFile.ELFDATANONE):
60 raise Exception("self.sex == ELFDATANONE")
61 elif self.sex == chr(ELFFile.ELFDATA2LSB):
62 self.sex = "<"
63 elif self.sex == chr(ELFFile.ELFDATA2MSB):
64 self.sex = ">"
65 else:
66 raise Exception("Unknown self.sex")
67
68 def osAbi(self):
69 return ord(self.data[ELFFile.EI_OSABI])
70
71 def abiVersion(self):
72 return ord(self.data[ELFFile.EI_ABIVERSION])
73
74 def abiSize(self):
75 return self.bits
76
77 def isLittleEndian(self):
78 return self.sex == "<"
79
80 def isBigEngian(self):
81 return self.sex == ">"
82
83 def machine(self):
84 """
85 We know the sex stored in self.sex and we
86 know the position
87 """
88 import struct
89 (a,) = struct.unpack(self.sex+"H", self.data[18:20])
90 return a
91
92 def run_objdump(self, cmd, d):
93 import bb.process
94 import sys
95
96 if cmd in self.objdump_output:
97 return self.objdump_output[cmd]
98
99 objdump = d.getVar('OBJDUMP', True)
100
101 env = os.environ.copy()
102 env["LC_ALL"] = "C"
103 env["PATH"] = d.getVar('PATH', True)
104
105 try:
106 bb.note("%s %s %s" % (objdump, cmd, self.name))
107 self.objdump_output[cmd] = bb.process.run([objdump, cmd, self.name], env=env, shell=False)[0]
108 return self.objdump_output[cmd]
109 except Exception as e:
110 bb.note("%s %s %s failed: %s" % (objdump, cmd, self.name, e))
111 return ""