.noinit variable value not retained after sys off

RE: .noinit variable value not retained after sys off

Eliot Stock — Thu, 10 Nov 2016 10:17:12 GMT

Here's the issue:

RAM (rwx) :     ORIGIN = 0x20002008, LENGTH = 0x5FF8
NOINIT (rwx) :  ORIGIN = 0x20007F5C, LENGTH = 0xA4

These two overlap. NOINIT should come after RAM, not within it.

RE: .noinit variable value not retained after sys off

Eliot Stock — Wed, 02 Nov 2016 08:55:13 GMT

Thanks. The bootloader isn't even flashed at the time I'm running this, despite the linker script I posted above, so I don't think that's my issue.

RE: .noinit variable value not retained after sys off

Alex — Tue, 01 Nov 2016 11:27:07 GMT

I'm not familiar with gdb and my situation probably different from yours but I will explain it so you may find solution. Basically with IAR in debug mode when I run my code it jumps to main() and if I restart debugger I didn't have problem so startup code didn't init my arrays. But in normal mode I had corruption. In the end I realised that my bootloader used RAM overlaped with noinit area in main code. Compare map files of bootloader and main.