I've created a newbie puzzle for myself.
I'm working with a Cypress FX2LP. I'm trying to put a ljmp at address 0x0000
that jumps to
my startup code like the GnuRadio folks do in their firmware. I have a vect.a51
file
with the two lines
__reset_vector::
ljmp foo
I also have a main.c, of course.
The thing is this. I compile everything separately without error, then use a
linker line like
sdcc -o main.ihx vect.rel main.rel
which links without error. The problem is, I never defined "foo", the target
for the
ljmp! When I look at the generated code, there is a ljmp 0 at address 0. How did
"foo" get to be zero. Why didn't the linker flag an error? I don't really want
foo, of
course, I want the address of my startup code, which the GnuRadio folks nab
with
ljmp s_GSINIT
If I use that, I still get no error and a ljmp to zero.
I'm using a SDCC 2.6.0 binary on WinXP. Is this a compiler/linker/asm bug? Or
am I just
being a dunce?
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C
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