Re: GDB and 64 bit

ccroswhite
2002-01-15T21:41:00Z

Kevin,

Here is an attempt to set break point at begining of gdb run:

> gdb meta-g
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This GDB was configured as "sparc-sun-solaris2.8"...
(gdb) break main.c:1
Breakpoint 1 at 0xe0e20: file main.c, line 1.
(gdb) run
Starting program: /home/csun/code2/src/bin-sunos5/meta-g
warning: Cannot insert breakpoint 1:
Cannot access memory at address 0xe0e20
(gdb)

As you can see, I can not set it even at startup.

let me know if you need more info.

Chris Croswhite
Get2Chip, Inc.

Kevin Buettner wrote:

> On Jan 15, 12:39pm, ccroswhite@get2chip.com wrote:
>
> > Here is an instance of both 1 and 2:
>
> Thanks.
>
> > > gdb bin-sunos5/meta-g
> [...]
> > Program received signal SIGABRT, Aborted.
> > 0xffffffff7e6a3074 in _libc_kill () from /usr/lib/64/libc.so.1
> > (gdb) where
> > #0 0xffffffff7e6a3074 in _libc_kill () from /usr/lib/64/libc.so.1
> > #1 0xffffffff7e63cd44 in abort () from /usr/lib/64/libc.so.1
>
> I agree that it does appear that GDB is confused about whether it's
> debugging 32- or 64-bit code. BTW, the sign extension problem looks
> familiar. See
>
> http://sources.redhat.com/ml/gdb/2001-10/msg00036.html
>
> > #2 0x100ae3ab4 in Letext ()
> > #3 0x100a0dbec in fre ()
> > #4 0x100a12ab0 in free ()
> > #5 0x1009f0764 in Tcl_Main ()
> > #6 0x1000e2244 in main ()
> > (gdb) break main.c:1
> > Breakpoint 1 at 0xe0e20: file main.c, line 1.
> > (gdb) run
> > The program being debugged has been started already.
> > Start it from the beginning? (y or n) y
> > Starting program: /home/csun/code2/src/bin-sunos5/meta-g
> > warning: Cannot insert breakpoint 1:
> > Cannot access memory at address 0xe0e20
>
> Are you able to successfully run to a breakpoint in main() if you set
> the breakpoint on the very first run of the program? Sometimes GDB
> has difficulties setting breakpoints when rerunning the program. (This
> should be fixed, but I'm trying to determine whether or not you can't
> run to _any_ breakpoint or if it's just a problem with rerunning the
> program...)
>
> Thanks again,
>
> Kevin