From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerry Van Baren Date: Thu, 14 Jul 2005 08:21:04 -0400 Subject: [U-Boot-Users] gdb debug! In-Reply-To: <20050714103307.10185.qmail@web15704.mail.cnb.yahoo.com> References: <20050714103307.10185.qmail@web15704.mail.cnb.yahoo.com> Message-ID: <42D658B0.9080402@smiths-aerospace.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de junping feng wrote: > > Hi,I have some question on gdb-debugger with > BDI2000.My board is like MPC8260ADS,ppcboot version is > 2.0.0. I have programed ppcboot.bin into flash with > BDI2000. After power on board ,information printed is > below: > > PPCBoot 2.0.0 (Jul 10 2005 - 11:54:35) > Rewin Tech :fengjunping && huangjianzhong > MPC8260 Reset Status: External Soft, External Hard > MPC8260 Clock Configuration > - Bus-to-Core Mult 5x, VCO Div 2, 60x Bus Freq 20-60 > , Core Freq 100-300 > - dfbrg 0, corecnf 0x0b, busdf 5, cpmdf 1, plldf 0, > pllmf 2 > - vco_out 199999998, scc_clk 49999999, brg_clk > 49999999 > - cpu_clk 166666665, cpm_clk 99999999, bus_clk > 33333333 > CPU: MPC8260 (Rev 14, Mask unknown > [immr=0x0064,k=0x002d]) at 166.666 MHz > > Board: Motorola MPC8260ADS > I2C: ready > DRAM: 16 MB > (stop here!) > > Then ,cpu hangs! > > When I debug source code with gdb,I am troubled with > the problem below: > I don't know where is wrong! > > > [root at localhost root]# cd ./ppcboot > [root at localhost ppcboot]# ppc-linux-gdb ppcboot > GNU gdb Yellow Dog Linux (5.2.1-4b_4) > Copyright 2002 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General > Public License, and you are > welcome to change it and/or distribute copies of it > under certain conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show > warranty" for details. > This GDB was configured as "--host=i386-redhat-linux > --target=ppc-linux"... > (gdb) target remote 192.168.1.108:2001 > Remote debugging using 192.168.1.108:2001 > 0xff812568 in crc32 (crc=1165264316, > buf=0xff845760 '?' ..., > len=239780) at crc32.c:166 > 166 DO8(buf); > (gdb) b cpu_init_f > Breakpoint 1 at 0xff803be8: file cpu_init.c, line 118. > (gdb) cont > Continuing. > warning: Cannot insert breakpoint 1: > Error accessing memory address 0xff803be8: Unknown > error 4294967295. > (gdb) run > The program being debugged has been started already. > Start it from the beginning? (y or n) n > Program not restarted. > (gdb) c > Continuing. > > Program received signal SIGSTOP, Stopped (signal). > 0x00000800 in ?? () > (gdb) [snip] > Now, many people are still using ppcboot, please help > me! > > Thanks in advance!! It appears you are doing new development. While u-boot is spelled differently than ppcboot, it is actually the same thing and you should switch if at all possible. The only reason I can think of not to switch is purely political, not technical. Ppcboot is dead-ended at 2.0.0: u-boot can be considered ppcboot 3.1.2 (2.0.0 + 1.1.2). Stopping at 0x800 is the "Floating-Point Unavailable Exception". This is symptomatic of having 0xFFs in your memory where you are trying to execute code - op-codes starting with 0xFF are floating point instructions and the FP unit isn't enabled. My deduction is that you have memory problems (gee, how did the list guess I was going to say that :-). Verify your flash really works (hardware problem or software problems). Verify your SDRAM initialization. Verify your memory map is correct (i.e. you are not jumping to non-existant memory). Read the FAQ 14.2.3 U-Boot crashes after relocation Read and understand the following: gvb