https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81708
--- Comment #10 from Uroš Bizjak <ubizjak at gmail dot com> --- Created attachment 41955 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41955&action=edit patch that introduces mstack-protector-guard-symbol= This patch can be used to override TLS offset with a symbol. gcc.target/i386/stack-prot-guard.c compiles to (-O2 -fstack-protector-all -mstack-protector-guard-symbol=symbol_name): f: subq $24, %rsp movq %fs:symbol_name(%rip), %rax movq %rax, 8(%rsp) xorl %eax, %eax movq 8(%rsp), %rax xorq %fs:symbol_name(%rip), %rax jne .L5 addq $24, %rsp ret