saimaa machine WIP: A7x4, RAM map, uartdm stub, SDHCI, SBL1 loader

tools/edp_carve.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+"""edp_carve.py — точная нарезка ELF из Emergency Payload (.edp) по program headers.
+Использование: ./tools/edp_carve.py fw/dl/edp-archorg-1127.edp out-dir/
+"""
+import os
+import struct
+import sys
+
+
+def elf_span(d, off):
+    assert d[off:off + 4] == b"\x7fELF", "not ELF"
+    entry = struct.unpack("<I", d[off + 24:off + 28])[0]
+    phoff = struct.unpack("<I", d[off + 28:off + 32])[0]
+    phnum = struct.unpack("<H", d[off + 44:off + 46])[0]
+    end = 0
+    segs = []
+    for i in range(phnum):
+        p = off + phoff + i * 32
+        ptype, poff, pv, pp, pfsz, pmsz, flg, al = struct.unpack("<IIIIIIII", d[p:p + 32])
+        if ptype == 1:  # PT_LOAD
+            segs.append((pv, pfsz, pmsz, flg))
+            end = max(end, poff + pfsz)
+    return entry, segs, end
+
+
+def main():
+    src, outdir = sys.argv[1], sys.argv[2]
+    d = open(src, "rb").read()
+    offs = []
+    i = 0
+    while True:
+        i = d.find(b"\x7fELF", i)
+        if i < 0:
+            break
+        offs.append(i)
+        i += 1
+    os.makedirs(outdir, exist_ok=True)
+    print(f"{len(offs)} ELFs")
+    for n, o in enumerate(offs):
+        try:
+            entry, segs, end = elf_span(d, o)
+        except Exception as e:
+            print(n, f"off={o} PARSE-FAIL {e}")
+            continue
+        open(f"{outdir}/img{n}.elf", "wb").write(d[o:o + end])
+        mem = sum(s[2] for s in segs)
+        print(f"img{n}: off={o} size={end} entry={entry:#x} mem={mem} "
+              + " ".join(f"[{v:#x}+{ms:#x}{'X' if fl & 1 else ''}]" for v, fz, ms, fl in segs))
+
+
+if __name__ == "__main__":
+    main()