From 60f9d69e016b11c468c98ea75ba0a60c44afbbc4 Mon Sep 17 00:00:00 2001
From: Patrick Williams <patrick@stwcx.xyz>
Date: Wed, 17 Aug 2016 14:31:25 -0500
Subject: yocto-poky: Move to import-layers subdir

We are going to import additional layers, so create a subdir to
hold all of the layers that we import with git-subtree.

Change-Id: I6f732153a22be8ca663035c518837e3cc5ec0799
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
---
 import-layers/yocto-poky/meta/lib/oe/qa.py | 151 +++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 import-layers/yocto-poky/meta/lib/oe/qa.py

(limited to 'import-layers/yocto-poky/meta/lib/oe/qa.py')

diff --git a/import-layers/yocto-poky/meta/lib/oe/qa.py b/import-layers/yocto-poky/meta/lib/oe/qa.py
new file mode 100644
index 000000000..3cfeee737
--- /dev/null
+++ b/import-layers/yocto-poky/meta/lib/oe/qa.py
@@ -0,0 +1,151 @@
+import os, struct
+
+class NotELFFileError(Exception):
+    pass
+
+class ELFFile:
+    EI_NIDENT = 16
+
+    EI_CLASS      = 4
+    EI_DATA       = 5
+    EI_VERSION    = 6
+    EI_OSABI      = 7
+    EI_ABIVERSION = 8
+
+    E_MACHINE    = 0x12
+
+    # possible values for EI_CLASS
+    ELFCLASSNONE = 0
+    ELFCLASS32   = 1
+    ELFCLASS64   = 2
+
+    # possible value for EI_VERSION
+    EV_CURRENT   = 1
+
+    # possible values for EI_DATA
+    ELFDATANONE  = 0
+    ELFDATA2LSB  = 1
+    ELFDATA2MSB  = 2
+
+    PT_INTERP = 3
+
+    def my_assert(self, expectation, result):
+        if not expectation == result:
+            #print "'%x','%x' %s" % (ord(expectation), ord(result), self.name)
+            raise NotELFFileError("%s is not an ELF" % self.name)
+
+    def __init__(self, name, bits = 0):
+        self.name = name
+        self.bits = bits
+        self.objdump_output = {}
+
+    def open(self):
+        if not os.path.isfile(self.name):
+            raise NotELFFileError("%s is not a normal file" % self.name)
+
+        self.file = file(self.name, "r")
+        # Read 4k which should cover most of the headers we're after
+        self.data = self.file.read(4096)
+
+        if len(self.data) < ELFFile.EI_NIDENT + 4:
+            raise NotELFFileError("%s is not an ELF" % self.name)
+
+        self.my_assert(self.data[0], chr(0x7f) )
+        self.my_assert(self.data[1], 'E')
+        self.my_assert(self.data[2], 'L')
+        self.my_assert(self.data[3], 'F')
+        if self.bits == 0:
+            if self.data[ELFFile.EI_CLASS] == chr(ELFFile.ELFCLASS32):
+                self.bits = 32
+            elif self.data[ELFFile.EI_CLASS] == chr(ELFFile.ELFCLASS64):
+                self.bits = 64
+            else:
+                # Not 32-bit or 64.. lets assert
+                raise NotELFFileError("ELF but not 32 or 64 bit.")
+        elif self.bits == 32:
+            self.my_assert(self.data[ELFFile.EI_CLASS], chr(ELFFile.ELFCLASS32))
+        elif self.bits == 64:
+            self.my_assert(self.data[ELFFile.EI_CLASS], chr(ELFFile.ELFCLASS64))
+        else:
+            raise NotELFFileError("Must specify unknown, 32 or 64 bit size.")
+        self.my_assert(self.data[ELFFile.EI_VERSION], chr(ELFFile.EV_CURRENT) )
+
+        self.sex = self.data[ELFFile.EI_DATA]
+        if self.sex == chr(ELFFile.ELFDATANONE):
+            raise NotELFFileError("self.sex == ELFDATANONE")
+        elif self.sex == chr(ELFFile.ELFDATA2LSB):
+            self.sex = "<"
+        elif self.sex == chr(ELFFile.ELFDATA2MSB):
+            self.sex = ">"
+        else:
+            raise NotELFFileError("Unknown self.sex")
+
+    def osAbi(self):
+        return ord(self.data[ELFFile.EI_OSABI])
+
+    def abiVersion(self):
+        return ord(self.data[ELFFile.EI_ABIVERSION])
+
+    def abiSize(self):
+        return self.bits
+
+    def isLittleEndian(self):
+        return self.sex == "<"
+
+    def isBigEndian(self):
+        return self.sex == ">"
+
+    def getShort(self, offset):
+        return struct.unpack_from(self.sex+"H", self.data, offset)[0]
+
+    def getWord(self, offset):
+        return struct.unpack_from(self.sex+"i", self.data, offset)[0]
+
+    def isDynamic(self):
+        """
+        Return True if there is a .interp segment (therefore dynamically
+        linked), otherwise False (statically linked).
+        """
+        offset = self.getWord(self.bits == 32 and 0x1C or 0x20)
+        size = self.getShort(self.bits == 32 and 0x2A or 0x36)
+        count = self.getShort(self.bits == 32 and 0x2C or 0x38)
+
+        for i in range(0, count):
+            p_type = self.getWord(offset + i * size)
+            if p_type == ELFFile.PT_INTERP:
+                return True
+        return False
+
+    def machine(self):
+        """
+        We know the sex stored in self.sex and we
+        know the position
+        """
+        return self.getShort(ELFFile.E_MACHINE)
+
+    def run_objdump(self, cmd, d):
+        import bb.process
+        import sys
+
+        if cmd in self.objdump_output:
+            return self.objdump_output[cmd]
+
+        objdump = d.getVar('OBJDUMP', True)
+
+        env = os.environ.copy()
+        env["LC_ALL"] = "C"
+        env["PATH"] = d.getVar('PATH', True)
+
+        try:
+            bb.note("%s %s %s" % (objdump, cmd, self.name))
+            self.objdump_output[cmd] = bb.process.run([objdump, cmd, self.name], env=env, shell=False)[0]
+            return self.objdump_output[cmd]
+        except Exception as e:
+            bb.note("%s %s %s failed: %s" % (objdump, cmd, self.name, e))
+            return ""
+
+if __name__ == "__main__":
+    import sys
+    elf = ELFFile(sys.argv[1])
+    elf.open()
+    print elf.isDynamic()
-- 
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