On Fri May 8 13:43 , Joel Sherrill sent: >I think I have tracked one down to this feature in >avrtest that (I think) is not in simulavrxx and >is probably the culprit > > " -d Initialize SRAM from .data (for ELF program)\n" > >This sets a flag which is used later only to do this: > > /* Also copy in SRAM. */ > if (flag_initialize_sram && vaddr >= DATA_VADDR) > memcpy(cpu_data + vaddr - DATA_VADDR, > cpu_flash + addr, filesz); > >The avrtest crt0.S code doesn't appear to copy >initialized data into RAM.
crt0.S is avr assembly code that C programs execute before main? >Any thoughts on how to implement this in simulavrxx? I'd expect it to look a lot like the code that initializes the flash. Perhaps the question is how to generate avr code that uses it? I think that with gnu tools the compilation stage could be left alone. The startup code could be mostly eliminated. I think it would just have to assign the stack pointer. The linker script would need to be changed. -- Michael Hennebry [email protected] "War is only a hobby." ---- Msg sent via CableONE.net MyMail - http://www.cableone.net _______________________________________________ Simulavr-devel mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/simulavr-devel
