Re: Using gdb with JEENI

[Fernando Nasser <fnasser at cygnus dot com>]

Which version of Cygwin are you using?

Jeremy Lin wrote:
> 
> I have a problem using JEENI with GDB 5.0 debugging.
> JEENI FirmwareVersion:2.0
> Connected via serial port and RDI(tar rdi s=com2),
> I'm doing the eCos porting to our customize board based on
> Samsung KS32C50100 (ARM7TDMI core). Right now I'm debugging
> the ROM image which initialize the board. The problem is, for example,
> here is a sample instructions of the ROM image dump by gnu objdump:
> 00008060 <reset_vector>:
>     8060:       e59f0458        ldr     r0, [pc, #458]
>     8064:       e5800000        str     r0, [r0]
> 
> 00008068 <warm_reset>:
>     8068:       e3a00000        mov     r0, #0  ; 0x0
>     806c:       e5800040        str     r0, [r0, #64]
>     8070:       e59f144c        ldr     r1, [pc, #44c]
>     8074:       e5912008        ldr     r2, [r1, #8]
>     8078:       e5802008        str     r2, [r0, #8]
>     807c:       e5912040        ldr     r2, [r1, #64]
>     8080:       e5802028        str     r2, [r0, #40]
>     8084:       ef000000        swi     0x00000000
> 
> when I set a breakpoint"b *0x8070" then "continue", it breaks
> normally. But after that I type "stepi" to run next instruction.
> This message comes out and gdb was terminated:
> 
> 0 [main] arm-elf-gdb 1003 handle_exceptions: Exception: \
> STATUS_ACCESS_VIOLATION
> 21532 [main] arm-elf-gdb 1003 stackdump: Dumping stack trace to
> arm-elf-gdb.exe.stack.dump
> Segmentation fault (core dump)
> 
> This happens also when I set the 2nd breakpoint (for example, at 0x8080) and
> enter "continue". So I can only set one breakpoint at a time...
> Does any one have the same problem?
> 
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-- 
Fernando Nasser
Red Hat - Toronto                       E-Mail:  fnasser@redhat.com
2323 Yonge Street, Suite #300
Toronto, Ontario   M4P 2C9