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fafc87112e
Modified environment is only required for new subprocess to execute objdump command and not for the current process. We should only modify the copy of env to pass it on to the child. (From OE-Core rev: cb3b046450b47739daf441a0b964823aff2472e6) Signed-off-by: Christopher Larson <chris_larson@mentor.com> Signed-off-by: Muhammad Shakeel <muhammad_shakeel@mentor.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
112 lines
3.4 KiB
Python
112 lines
3.4 KiB
Python
class ELFFile:
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EI_NIDENT = 16
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EI_CLASS = 4
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EI_DATA = 5
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EI_VERSION = 6
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EI_OSABI = 7
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EI_ABIVERSION = 8
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# possible values for EI_CLASS
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ELFCLASSNONE = 0
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ELFCLASS32 = 1
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ELFCLASS64 = 2
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# possible value for EI_VERSION
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EV_CURRENT = 1
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# possible values for EI_DATA
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ELFDATANONE = 0
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ELFDATA2LSB = 1
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ELFDATA2MSB = 2
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def my_assert(self, expectation, result):
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if not expectation == result:
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#print "'%x','%x' %s" % (ord(expectation), ord(result), self.name)
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raise Exception("This does not work as expected")
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def __init__(self, name, bits = 0):
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self.name = name
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self.bits = bits
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self.objdump_output = {}
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def open(self):
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self.file = file(self.name, "r")
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self.data = self.file.read(ELFFile.EI_NIDENT+4)
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self.my_assert(len(self.data), ELFFile.EI_NIDENT+4)
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self.my_assert(self.data[0], chr(0x7f) )
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self.my_assert(self.data[1], 'E')
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self.my_assert(self.data[2], 'L')
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self.my_assert(self.data[3], 'F')
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if self.bits == 0:
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if self.data[ELFFile.EI_CLASS] == chr(ELFFile.ELFCLASS32):
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self.bits = 32
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elif self.data[ELFFile.EI_CLASS] == chr(ELFFile.ELFCLASS64):
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self.bits = 64
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else:
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# Not 32-bit or 64.. lets assert
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raise Exception("ELF but not 32 or 64 bit.")
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elif self.bits == 32:
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self.my_assert(self.data[ELFFile.EI_CLASS], chr(ELFFile.ELFCLASS32))
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elif self.bits == 64:
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self.my_assert(self.data[ELFFile.EI_CLASS], chr(ELFFile.ELFCLASS64))
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else:
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raise Exception("Must specify unknown, 32 or 64 bit size.")
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self.my_assert(self.data[ELFFile.EI_VERSION], chr(ELFFile.EV_CURRENT) )
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self.sex = self.data[ELFFile.EI_DATA]
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if self.sex == chr(ELFFile.ELFDATANONE):
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raise Exception("self.sex == ELFDATANONE")
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elif self.sex == chr(ELFFile.ELFDATA2LSB):
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self.sex = "<"
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elif self.sex == chr(ELFFile.ELFDATA2MSB):
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self.sex = ">"
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else:
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raise Exception("Unknown self.sex")
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def osAbi(self):
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return ord(self.data[ELFFile.EI_OSABI])
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def abiVersion(self):
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return ord(self.data[ELFFile.EI_ABIVERSION])
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def abiSize(self):
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return self.bits
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def isLittleEndian(self):
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return self.sex == "<"
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def isBigEngian(self):
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return self.sex == ">"
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def machine(self):
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"""
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We know the sex stored in self.sex and we
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know the position
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"""
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import struct
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(a,) = struct.unpack(self.sex+"H", self.data[18:20])
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return a
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def run_objdump(self, cmd, d):
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import bb.process
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import sys
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if self.objdump_output.has_key(cmd):
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return self.objdump_output[cmd]
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objdump = d.getVar('OBJDUMP', True)
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staging_dir = d.getVar('STAGING_BINDIR_TOOLCHAIN', True)
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env = os.environ.copy()
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env["LC_ALL"] = "C"
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try:
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bb.note("%s %s %s" % (objdump, cmd, self.name))
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self.objdump_output[cmd] = bb.process.run([ os.path.join(staging_dir, objdump), cmd, self.name ], env=env, shell=False)[0]
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return self.objdump_output[cmd]
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except Exception, e:
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bb.note("%s %s %s failed: %s" % (objdump, cmd, self.name, e))
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return ""
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