By default GCC puts global non-initialized variables in COMMON section. And we used to ignore existence of COMMON section in our linker scripts though smart LD silently appended it right after .bss.
And the problem here is variables from COMMON section even though require zeroing in run-time were not zeroed as they were placed right after __bss_end symbol.
It was a pure luck we never faced serious problem due to this, but now it is fixed.
Now as for some other architectures we'll just force GCC to put those global variables in normal .bss section.
This solution is much nicer than adding COMMON section to each and every linker script.
Signed-off-by: Alexey Brodkin abrodkin@synopsys.com --- arch/arc/config.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arc/config.mk b/arch/arc/config.mk index d255c90..18005d9 100644 --- a/arch/arc/config.mk +++ b/arch/arc/config.mk @@ -43,7 +43,7 @@ PLATFORM_CPPFLAGS += -mcpu=archs endif
PLATFORM_CPPFLAGS += -ffixed-r25 -D__ARC__ -gdwarf-2 -mno-sdata -PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections +PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections -fno-common
# Needed for relocation LDFLAGS_FINAL += -pie --gc-sections