recent gcc complains about "LOAD segment with RWX permissions"

[fenugrec]

/usr/lib/gcc/arm-none-eabi/12.2.0/../../../../arm-none-eabi/bin/ld: warning: cantact_fw has a LOAD segment with RWX permissions

Trying the naive fix of editing the .ldscripts RAM section as

RAM (rw) : ORIGIN = 0x20000000, LENGTH = 6K

has no effect.

A search quickly indicates we're not the only ones seeing this :

https://stackoverflow.com/questions/73429929/gnu-linker-elf-has-a-load-segment-with-rwx-permissions-embedded-arm-project

I haven't had time to dig any further.
I'm also fairly certain this can be disregarded on baremetal, non-MMU firmware like this.

[marckleinebudde]

FYI: https://lore.kernel.org/all/[email protected]

[fenugrec]

can we add --no-warn-rwx-segmentssystematically or would that break on older binutils versions ?

[EDIT] ugh, no, that won't work on older versions. Not sure how I feel about doing binutils version checking in cmakelists. Doesn't bother me enough to spend time on this.

[fenugrec]

Maybe cmake has a mechanism to check for ld-options ?
Projects using plain makefiles have to resort to this kind of script

https://github.com/OP-TEE/optee_os/blob/203ee23d005b2cec2f21b5de334c5a246be32599/mk/cc-option.mk

[marckleinebudde]

I think it's supported by cmake diretly?
https://cmake.org/cmake/help/latest/module/CheckLinkerFlag.html