tools/sbl_dis: range disassembler (struct phdrs, no elftools on zern)

tools/sbl_dis.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+import struct
+import sys
+import capstone
+path, va = sys.argv[1], int(sys.argv[2], 0)
+n = int(sys.argv[3], 0) if len(sys.argv) > 3 else 96
+d = open(path, 'rb').read()
+phoff, phnum = struct.unpack('<I', d[28:32])[0], struct.unpack('<H', d[44:46])[0]
+for k in range(phnum):
+    p = d[phoff+k*32:phoff+(k+1)*32]
+    typ, off, v, _, fsz, msz, _, _ = struct.unpack('<8I', p)
+    if typ == 1 and v <= va < v + msz:
+        cs = capstone.Cs(capstone.CS_ARCH_ARM, capstone.CS_MODE_THUMB)
+        for i in cs.disasm(d[off+(va-v):off+(va-v)+n], va):
+            print('  0x%x:\t%s\t%s' % (i.address, i.mnemonic, i.op_str))
+        break