On 2/25/22 09:01, Henrique Coser wrote:
Hello,
I need a help. I'm trying to solve a problem for weeks.
I have a embeded software that is a boot loader. It puts the boot load version at a specific address.
My memmory starts at 0x400000 with 0x1400 size. My constant version string value must be placed @0x401000 with 8bytes length.
If I place this const value into a section like this:
const unsigned char Version[8] __attribute__ ((section (".bootversion"))) = "V1.0.1a";
I got this error:
section .bootversion LMA [00401000,00401007] overlaps section .text LMA [00400000,00401013]collect2.exe(0,0): error: ld returned 1 exit status
I have already tried to split flash memmory using linker script but it does not worked.
I wish to find something like "automatic" split.
For example, this code was compiled using ARM Keil. With ARM Keil I have the attribute that makes all the magic :
const unsigned char Version[8] __attribute__((at(0x0401000))) = "V1.0.1a";
I dont know if is possible to have something as pratical as ARM Keil attribute in GCC.
GCC for the AVR target supports a couple of attributes that can be
used to pin a variable declaration to a fixed address: address and
io. It doesn't look to me like they're put in their own sections
like in the ARM Keil compiler (but the section attribute can be
used for that).
Beside your use case, exposing at least the address attribute in all
targets would make would also solve a long-standing problem with GCC
issuing warnings for accesses to hardwired addresses).
I suggest opening an enhancement request in Bugzilla.
Martin
I really need make this thing work.
If this is not the best channel to ask, please, could you recommend me one?
Thank you very much!
Henrique Coser
Engenharia
TEX Equip.Eletronicos Ind.e Com.Ltda.
Fone: (+5511) 4591-2825
henrique.coser@xxxxxxxxxx<mailto:compras@xxxxxxxxxx>
MEDIR PARA MELHORAR!
