[ARM] Avoid dereferencing null pointers

[Christophe Lyon <christophe dot lyon at linaro dot org>]

Hi,

While building an ARM FDPIC toolchain with a compiler generating Thumb
code, I face a couple of null pointer dereferences in cmse_scan().

When browsing ld-uClibc.so.1, all the external symbols have no info in
sym_hashes (sym_hashes[X] == NULL), and when handling libgcc_s.so.1
for the 2nd time in the same command, sym_hashes == NULL.

I don't know why this doesn't happen with a compiler generating Arm
code (ie. why the symbol tables are handled differently), but the
attached small patch prevents the linker from crashing.

OK?

Thanks,

Christophe

Attachment: binutils-cmse-null-pointers.patch.txt
Description: Text document

Attachment: binutils-cmse-null-pointers.chlog.txt
Description: Text document