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__mem_fault_handler, RedBoot and no GDB stubs.
- From: David Vrabel <dvrabel at arcom dot com>
- To: ecos-discuss at sources dot redhat dot com
- Date: Thu, 13 May 2004 13:13:13 +0100
- Subject: [ECOS] __mem_fault_handler, RedBoot and no GDB stubs.
Hi,
There appears to be some confusion regarding RedBoot use of
__mem_fault_handler. This would typically be provided by the GDB stubs
(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) but ARM (but not i386 or powerpc,
for example) provides it in hal/arm/arch/current/src/hal_misc.c if GDB
stubs are disabled. Additionally, RedBoot provides it if GDB stubs are
disabled.
Here's the patch I used to get it working on ARM. It won't work on
other archs as __mem_fault_handler is then undefined. Is RedBoot at
fault here, or ARM, or the other archs?
diff -u -B -p -r1.10 main.c
--- a/redboot/current/src/main.c 20 Apr 2004 15:11:31 -0000 1.10
+++ b/redboot/current/src/main.c 13 May 2004 12:01:49 -0000
@@ -225,10 +225,7 @@ _mon_write_char(char c, void **param)
// Handle illegal memory accesses (and other abort conditions)
//
static hal_jmp_buf error_jmpbuf;
-#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
-externC
-#endif
- void* volatile __mem_fault_handler;
+externC void* volatile __mem_fault_handler;
static void error_handler(void)
{
David Vrabel
--
David Vrabel, Design Engineer
Arcom, Clifton Road Tel: +44 (0)1223 411200 ext. 3233
Cambridge CB1 7EA, UK Web: http://www.arcom.com/
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