34 lines
661 B
JavaScript
34 lines
661 B
JavaScript
#!/bin/sh
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let fs = require("fs")
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function build() {
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let cr = fs.readFileSync("cram.bin")
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if (cr.length > 10878976) {
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console.log("too big")
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return
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}
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let img = fs.readFileSync("boot.bin")
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let off = 0x250000
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if (img[off] != 0x45 || img[off + 1] != 0x3d) {
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console.log("bad magic: " + img[off] + " / " + img[off+1])
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return
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}
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cr.copy(img, off)
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let kern = fs.readFileSync("piggy-patched.gzip")
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off = 0x0005540f
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if (img[off] != kern[0] || img[off+1] != kern[1]) {
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console.log("bad kernel magic: " + img[off] + " / " + img[off+1])
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return
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}
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kern.copy(img, off)
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fs.writeFileSync("firmware.bin", img)
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}
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build()
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