36 lines
1005 B
Bash
36 lines
1005 B
Bash
#!/usr/bin/env bash
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set -euo pipefail
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IMG="${1:-/mnt/d/Code/DEAICUP/Deshab/ISO/deshab-dev.img}"
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LOOP=$(losetup --find --show --partscan "$IMG")
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sleep 0.3
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ESP=$(mktemp -d)
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mount "${LOOP}p1" "$ESP"
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cp -f "$ESP/boot/linux-rootfs.img" /tmp/linux-rootfs-check.img
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umount "$ESP"
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losetup -d "$LOOP"
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rmdir "$ESP"
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M=$(mktemp -d)
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mount -o loop,ro /tmp/linux-rootfs-check.img "$M"
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python3 - "$M" <<'PY'
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import os, sys
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root = sys.argv[1]
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path = None
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for cand in (root + "/usr/lib/libc.so.6", root + "/lib/libc.so.6"):
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if os.path.exists(cand):
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path = cand
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break
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print("libc", path)
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with open(path, "rb") as f:
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data = f.read()
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off = 0x199140
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print("size", len(data), "at", hex(off), data[off:off+16].hex())
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print("endbr64 count", data.count(b"\xf3\x0f\x1e\xfa"))
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print("badnop count", data.count(b"\x0f\x1f\x40\x00"))
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print("nop90 at site", data[off:off+4] == b"\x90\x90\x90\x90")
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PY
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umount "$M"
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rmdir "$M"
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echo "===== df ====="
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df -h /home /tmp | head
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ls -lh "$IMG" /tmp/linux-rootfs-check.img
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