From: Timur Tabi <timur@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] debug u-boot using bdi2000
Date: Fri, 13 Oct 2006 13:38:50 -0500 [thread overview]
Message-ID: <452FDD3A.1050004@freescale.com> (raw)
In-Reply-To: <1160764494.27646.91.camel@saruman.qstreams.net>
Ben Warren wrote:
> I don't know how well supported your CPU is (I've never heard of it, but
> that's not saying much) Anyway, I've debugged ROM on a couple of
> different MPC8349s, but not with 100% success. I can single-step with
> the BDI, and can single-step assembly code, but not C code using gdb.
I don't know about PowerPC processors, but on x86, single-stepping assembly code is completely different from single-stepping C code. With assembly, the debugger typically enables instruction interrupts, where an interrupt is generated after each instruction is executed. This does not require modifying memory.
With C code, a single line of C code is usually multiple assembly instructions, so the debugger (gdb in this case) places a breakpoint at the appropriate spot.
--
Timur Tabi
Linux Kernel Developer @ Freescale
next prev parent reply other threads:[~2006-10-13 18:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-13 17:41 [U-Boot-Users] debug u-boot using bdi2000 Reeve Yang
2006-10-13 18:05 ` Ben Warren
2006-10-13 18:12 ` Reeve Yang
2006-10-13 18:23 ` Reeve Yang
2006-10-13 18:44 ` Ben Warren
2006-10-13 18:34 ` Ben Warren
2006-10-13 18:38 ` Timur Tabi [this message]
2006-10-13 18:48 ` Ben Warren
2006-10-13 18:52 ` Brent Cook
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