Add arch config module

Add Arch class which specifies wordsize, endianness, alignment, and a
nop code for an architecture.
Add a couple predefined architectures for x86 and x86_64
Add a "configured" architecture which is set to x86_64 by default.
Added btoi and itob functions which will convert to and from bytes and
ints based on the current architecture config

Signed-off-by: dusoleil <howcansocksbereal@gmail.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/sploit/arch.py b/sploit/arch.py
new file mode 100644
index 0000000..d75bbda
--- /dev/null
+++ b/sploit/arch.py
@@ -0,0 +1,28 @@
+def btoi(b, signed=False):
+    return int.from_bytes(b, arch.endianness, signed=signed)
+
+def itob(i, signed=False):
+    return i.to_bytes(arch.wordsize, arch.endianness, signed=signed)
+
+class Arch:
+    def __init__(self, wordsize, endianness, alignment, nop):
+        self.wordsize = wordsize
+        self.endianness = endianness
+        self.alignment = alignment
+        self.nop = nop
+
+archx86 = Arch(
+    wordsize = 4,
+    endianness = "little",
+    alignment = 16,
+    nop = b'\x90'
+)
+
+archx86_64 = Arch(
+    wordsize = 8,
+    endianness = "little",
+    alignment = 16,
+    nop = b'\x90'
+)
+
+arch = archx86_64