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To: [EMAIL PROTECTED]
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 <[EMAIL PROTECTED]>
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 | [EMAIL PROTECTED]
NetGuide Scandinavia | telnet kingdoms.se 1812 | Fax: +46 31 50 79 39
http://www.netg.se | | Tel: +46 31 50 79 40
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Date: Mon, 1 Oct 2001 21:42:52 -0400
From: Ben Darnell <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED], [EMAIL PROTECTED],
[EMAIL PROTECTED], [EMAIL PROTECTED],
[EMAIL PROTECTED]
Subject: POSE has replaced xcopilot
Message-ID: <[EMAIL PROTECTED]>
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Xcopilot has been removed from the Debian distribution. If you haven't
already, I suggest you install the pose package and use it instead of
xcopilot for your Palm emulation needs. =20
-Ben
--=20
Ben Darnell [EMAIL PROTECTED]
http://thoughtstream.org
Finger [EMAIL PROTECTED] for PGP/GPG key 1024D/1F06E509
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