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Re: RE problem with gcc3.2 compiler
- From: Jonathan Larmour <jifl at eCosCentric dot com>
- To: Ottawa Guy <ottawaguy81 at yahoo dot com>
- Cc: eCos development <ecos-devel at ecos dot sourceware dot org>
- Date: Mon, 27 Oct 2003 02:12:43 +0000
- Subject: Re: RE problem with gcc3.2 compiler
- References: <20031024184308.18620.qmail@web13012.mail.yahoo.com>
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Ottawa Guy wrote:
Hi Jifl
Yes, when I use "--gc-section" with gcc2.95 my program
works. I am not sure what special thing happening with
""--gc-section" flag.
Do you have any idea why this "-Wl,--gc-sections"
might have some effect.
I'm not familiar with the details of the sparc port, but I'd hazard a
guess that in fact it's the compiler runtime inserting objects into the
image. Generate a linker map for a version with or without gc-sections and
compare the objects. Alternatively "simply" try debugging it, if necessary
with diag_printf's or LED twiddling to see how far through the startup it
gets (if any).
Regarding the gcc3.x load. When I jump to 0x40001300
my system halts.
Is that the right address? That was only given below as what the tools
assumed. You should use the address of the symbol "reset_vector".
Jifl
--- Jonathan Larmour <jifl@eCosCentric.com> wrote:
Ottawa Guy wrote:
Thanks Jifl for your response. With the warning
when I
try to run my code, my system hangs. That mean
"--gc-sections" flag must be cleaning up something
else.
You mean it works when you use -Wl,--gc-sections?
Do you any chance have "sparc-elf" for gcc3.x
toolset
for a linux machine. I compiled the tool set on my
linux machine, I still have the same
problem(constructor ordering).
Sorry I don't. We've recommended Jiri's site for
those tools since this is
his port.
I downloaded the "sparc-elf" binary file from
"www.gaisler.com" website. I get the following
error.
root@ssc045 examples]# sparc-rtems-gcc hello.c
-I./ -o
hello.out
-I/tmp/ecos/install/include
-L/tmp/ecos/install/lib
-nostdlib
-Wl,--gc-sections -Ttarget.ld
/opt/rtems/lib/gcc-lib/sparc-rtems/3.2.3/../../../../sparc-rtems/bin/ld:
warning: cannot find entry symbol start;
defaulting to
40001300
That may be benign, however it's meant to get the
start information from
target.ld, e.g. in
hal/sparc/arch/current/src/sparc.ld:
ENTRY(reset_vector)
Jifl
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--["No sense being pessimistic, it wouldn't work anyway"]-- Opinions==mine