> I assume that you mean "readelf -D -r w" here, as you are looking for
dynamic relocs ?
...
96e4 0b14 R_ARM_COPY96e4 debug_f
found.
> What happens when you run the compiled w.c test program ? Is there a
seg-fault for
> accessing memory at address 0 ?
Yes.
I switched to
On 04/06/2017 04:20 AM, Katsuya TANAKA wrote:
# ~/x-tools/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-gcc
-march=armv7-a -o w w.c
~/x-tools/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-readelf -r
w
There is no "debug_f" symbol.
Why not?
The value of a weak symbol is
Hi Katsuya,
> # ~/x-tools/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-readelf
> -r w
I assume that you mean "readelf -D -r w" here, as you are looking for dynamic
relocs ?
> Relocation section '.rel.dyn' at offset 0x270 contains 1 entries:
> Offset InfoType
w.c
#include
extern int debug_f __attribute__ ((weak));
int main(int, char *[]);
int main(int argc, char *argv[])
{
printf("flag %d", debug_f);
}
w.c
# ~/x-tools/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-gcc
-march=armv7-a -o w w.c
#
