Bug#24740: marked as done (xcopilot can't load 3com's debug rom images)
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To: submit@bugs.debian.org
Subject: xcopilot can't load 3com's debug rom images
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Date: Sun, 19 Jul 1998 05:51:25 +0200
From: Anders Hammarquist <iko@iko.pp.se>
Package: xcopilot
Version: 0.6.4-1
Xcopilot will not run with the 3com debug images. With this patch that I
hacked together, it will run both the 2.0 and 3.0 image (at least for me).
Enjoy,
/Anders
diff -urN xcopilot-v0.6.4/mc68k/memory.c xcopilot-v0.6.4.new/mc68k/memory.c
--- xcopilot-v0.6.4/mc68k/memory.c Tue Jul 14 00:36:02 1998
+++ xcopilot-v0.6.4.new/mc68k/memory.c Sun Jul 19 05:45:17 1998
@@ -336,12 +336,46 @@
return rommemory + (addr >> 1);
}
+static int
+verify_entrypoint(const void *rom)
+{
+ const char _bootsign[] = { 0x4e, 0xfa, 0x00, 0x00, 'b', 'o', 'o', 't',
+ 0x27, 0x10, 0xff };
+ const char _bootmask[] = { 0xff, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0x00 };
+
+ const char *bootsign = _bootsign, *bootmask = _bootmask;
+
+ while ((*bootsign & *bootmask) == *bootsign)
+ if ((*(char *)rom++ & *bootmask++) != *bootsign++)
+ return 0;
+
+ return 1;
+}
+
+static const void *
+find_entrypoint(const void *rom)
+{
+ const void *entry = rom;
+
+ while (entry - rom < rom_size)
+ {
+ if (verify_entrypoint(entry))
+ return entry;
+ else
+ entry += 2; /* Instructions must be word aligned */
+ }
+
+ return NULL;
+}
+
/* This routine replaces the win_load_rom routine */
/* It was grabbed from copilot-linux sources */
static int load_rom(const char *dir, const char *romfile)
{
int i;
char *rombuf;
+ void *resetv;
int f;
struct stat st;
@@ -375,7 +409,52 @@
if (rommemory == (UWORD *)-1) {
return PILOTCPU_ERROR_LOADING_ROM;
}
-
+
+ /* Check if the reset vector looks plausible */
+ resetv = (void *)rommemory +
+ (ntohl(*(CPTR *)(((void *)rommemory)+4)) - rom_start);
+
+ if (!verify_entrypoint(resetv))
+ {
+ int offset;
+ int pageoffset;
+ void *newrom;
+
+ /* It didn't - we need to find it */
+ if (1 != ntohs(*(UWORD *)(((void *)rommemory)+0x0c)))
+ {
+ offset = ntohl(*(CPTR *)(((void *)rommemory)+0x68)) +
+ sram_start - rom_start;
+ }
+ else
+ {
+ offset = resetv - find_entrypoint(rommemory);
+ }
+
+ /* Did we find it? If not, lets go with the original. */
+ if (offset != resetv)
+ {
+ /* It may not always be page aligned... */
+ pageoffset = ((offset-1) & ~(getpagesize() - 1)) + getpagesize();
+
+ munmap((void *)rommemory, rom_size);
+
+ if ((st.st_size + offset) > rom_size) rom_size <<= 1;
+
+ newrom = mmap(0, rom_size, PROT_READ|PROT_WRITE,
+ MAP_PRIVATE|MAP_ANON, -1, 0);
+ rommemory = (UWORD *)mmap(newrom+pageoffset, rom_size-pageoffset,
+ PROT_READ|PROT_WRITE,
+ MAP_FILE|MAP_PRIVATE|MAP_FIXED, f, 0);
+ if (rommemory == (UWORD *)-1) {
+ return PILOTCPU_ERROR_LOADING_ROM;
+ }
+ memcpy(((void *)rommemory)-offset, rommemory, 256);
+ ((void *)rommemory) -= offset;
+ }
+ }
+
+#ifndef WORDS_BIGENDIAN
for (i = 0; i < rom_size/2; i++) {
UWORD *p;
UBYTE *bp;
@@ -383,7 +462,8 @@
bp = (UBYTE *)p;
*p = (*bp << 8) | *(bp + 1);
}
-
+#endif
+
close(f);
return 0;
}
--
-- Of course I'm crazy, but that doesn't mean I'm wrong.
Anders Hammarquist | Mud at Kingdoms | iko@netg.se
NetGuide Scandinavia | telnet kingdoms.se 1812 | Fax: +46 31 50 79 39
http://www.netg.se | | Tel: +46 31 50 79 40
---------------------------------------
Received: (at 24740-done) by bugs.debian.org; 1 Oct 2001 22:56:39 +0000
>From baruch@klecker.debian.org Mon Oct 01 17:56:39 2001
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Date: Mon, 1 Oct 2001 15:56:38 -0700
To: 21966-done@bugs.debian.org, 24740-done@bugs.debian.org,
37081-done@bugs.debian.org, 18472-done@bugs.debian.org,
34321-done@bugs.debian.org
Subject: Bugs close after package removal
Message-ID: <20011001155638.A3274@klecker.debian.org>
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From: Baruch Even <baruch@klecker.debian.org>
Delivered-To: 24740-done@bugs.debian.org
xcopilot was removed from unstable since it was superseded by pose.
The bugs are old and probably meaningless by now so they are closed,
if they persist in pose, create new bug reports for pose.
Baruch
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