ChibiOS Free Embedded RTOS

ok.
does this mean that all addresses will end with bit zero set to one?
if so. how come gcc produces a blx 0x20010184 instruction?
im using the same flags as chibios makefile.
matias

Are you looking at the actual memory content or the listing file?

Giovanni

well both.
listing shows the address as a offset. while debugger shows it as absolute.
m

The program counter bit zero must always contain 1, I would assume there is an error in compiler options or in the assembler sources, you need to use the .thumb directive in assembler files.

Giovanni

ok.
but this instuction comes from c code. so theres no hand crafted assembly
looks like this

this results in blx instruction
i should mention that test() is not defined. but is intended to be linked at runtime
thus a entry in the plt

So, it is the linker that has to put an odd address there or I am missing something?

Giovanni

i doubt there is anything wrong with the linker for such a simple example.
but perhaps i must align .got section in the linker file to a uneven offset?

m

perhaps tyere is a linker bug here. blx (address) is not supported on m4
it must be blx rm

I think "blx" only accepts a register as parameter or it would be "bl" which is limited to near addresses.

Giovanni

yes. so theee must be a linker bug or some flag required?