Hello, Sergey Bugaev, le jeu. 20 avril 2023 16:08:45 +0300, a ecrit: > Is that actually configurable somewhere (at gcc/binutils build time, I > mean)?
It's probably in the link script, somewhere in /usr/lib/*/ldscripts/elf*x86_64* > I'm thinking we will want to map the lower 4GB of address space > inaccessible like dyld does, and not just one page, to catch pointer > truncation in addition to nullptr dereferences. That sounds useful indeed. > But that would need gcc/ld to know to not use low addresses for their > needs. It seems that binutils' ld/emulparams/ there are already some per-OS files: elf_x86_64_cloudabi.sh elf_x86_64_fbsd.sh elf_x86_64_haiku.sh elf_x86_64_sol2.sh One can probably create a gnu file that overrides TEXT_START_ADDR=0x400000 BTW, which dynamic linker path do we have set for x86_64-gnu? Samuel
