freemyipod r942 - Code Review

Repository:	freemyipod
Revision:	< r941‎ \| r942 \| r943 >
Date:	12:34, 14 June 2014
Author:	theseven
Status:	new
Tags:
Comment:	genBBT: Backport some fixes from hddscan2
Modified paths:	/emcore/trunk/tools/genbbt.c (modified) (history)

Diff [purge]

Index: emcore/trunk/tools/genbbt.c
—	—	@@ -33,7 +33,7 @@
34	34	if (sscanf(line, "%i", &sector) == 1 && sector) mark_bad(bitmap, sector);
35	35	}
36	36	fclose(in);
37		~~- int l0count = (sectors + 0x7ffff) >> 19;~~
	37	+ int l0count = (sectors + 0xfffff) >> 19;
38	38	int bbtpages = 64 + ((l0count + 0x3f) & ~0x3f);
39	39	int bbtsize;
40	40	uint16_t (*bbt)[0x20];
—	—	@@ -41,7 +41,7 @@
42	42	while (bbtpages <= 32832)
43	43	{
44	44	bbtsize = bbtpages << 6;
45		~~- l0count = (sectors - bbtsize + 0xfffff) >> 19;~~
	45	+ l0count = (sectors - ((bbtsize + 0xfff) >> 12) + 0xfffff) >> 19;
46	46	bbt = malloc(bbtsize);
47	47	memset(bbt, 0, bbtsize);
48	48	int logical = 0;
—	—	@@ -64,7 +64,7 @@
65	65	else if (!(logical & 0x3ff)) level = 1;
66	66	else if (!(logical & 0x1f)) level = 2;
67	67	else level = 3;
68		~~- if (!level) remapbase = ((physical - logical) >> 12) << 12;~~
	68	+ if (!level) remapbase = (physical - logical) & ~0xfff;
69	69	if (physical - logical - remapbase > 0x7fff \|\| remapbase > 0xffff)
70	70	{
71	71	printf("Need to remap across too high distance!\n");
—	—	@@ -167,7 +167,7 @@
168	168	printf("User data sectors: %d (%d KiB)\n", logical, logical << 2);
169	169	memcpy(bbt, "emBIbbth", 8);
170	170	((uint32_t*)bbt)[0x1fc] = logical;
171		~~- ((uint32_t*)bbt)[0x1ff] = (bbtpages >> 6) - 1;~~
	171	+ ((uint32_t*)bbt)[0x1ff] = bbtgood;
172	172	break;
173	173	}
174	174	free(bbt);