hw_ss 423 tools/testing/selftests/x86/sigreturn.c unsigned short hw_ss; hw_ss 424 tools/testing/selftests/x86/sigreturn.c asm ("mov %%ss, %0" : "=rm" (hw_ss)); hw_ss 425 tools/testing/selftests/x86/sigreturn.c if (hw_ss != *ssptr(ctx)) {