Re: [Etherboot-developers] [COMMIT] 5.1.2+ boot from disk.

[Eric W B. <ebi...@ln...>]

Eric W Biederman <ebi...@ln...> writes:
 
> That is one address I forget to check to see if it is safe to load.  Want to
> take a look at that?

In particular something like:

	printf("(NBI)");
	/* Zero all context info */
	memset(&tctx, 0, sizeof(tctx));
	/* Copy first 4 longwords */
	memcpy(&tctx.img, data, sizeof(tctx.img));
	/* Memory location where we are supposed to save it */
	tctx.segaddr = tctx.linlocation = 
		((tctx.img.u.segoff.ds) << 4) + tctx.img.u.segoff.bx;
+	if (!prep_segment(tctx.segaddr, tctx.segaddr + 512, tctx.segaddr + 512,
+		0, 512) {
+		return 0;
+	}
	/* Grab a copy */
	memcpy(phys_to_virt(tctx.segaddr), data, 512);
	/* Advance to first segment descriptor */
	tctx.segaddr += ((tctx.img.length & 0x0F) << 2)
		+ ((tctx.img.length & 0xF0) >> 2);
	/* Remember to skip the first 512 data bytes */
	tctx.first = 1;

Eric