From 494eb254c37507e836b5c791a3dbd8552777ddf7 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Fri, 20 Dec 2024 05:31:05 +0800 Subject: Add include/libc-misc.h Add include/libc-misc.h to provide miscellaneous definitions for both glibc build and test: 1. Move inhibit_stack_protector to libc-misc.h and add Clang support. 2. Add test_inhibit_stack_protector for glibc testing. 3. Move inhibit_loop_to_libcall to libc-misc.h. 4. Add test_cc_inhibit_loop_to_libcall to handle TEST_CC != CC and replace inhibit_loop_to_libcall with test_cc_inhibit_loop_to_libcall in glibc tests. Signed-off-by: H.J. Lu Co-Authored-By: Adhemerval Zanella Reviewed-by: Sam James --- include/libc-misc.h | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 include/libc-misc.h (limited to 'include/libc-misc.h') diff --git a/include/libc-misc.h b/include/libc-misc.h new file mode 100644 index 0000000000..23fc1c1f60 --- /dev/null +++ b/include/libc-misc.h @@ -0,0 +1,67 @@ +/* Miscellaneous definitions for both glibc build and test. + Copyright (C) 2024 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef _INCLUDE_MISC_H +#define _INCLUDE_MISC_H + +#include + +/* Add the compiler optimization to inhibit loop transformation to library + calls. This is used to avoid recursive calls in memset and memmove + default implementations in tests. */ +#ifdef HAVE_CC_INHIBIT_LOOP_TO_LIBCALL +# define inhibit_loop_to_libcall \ + __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) +#else +# define inhibit_loop_to_libcall +#endif + +#ifdef HAVE_TEST_CC_INHIBIT_LOOP_TO_LIBCALL +# define test_cc_inhibit_loop_to_libcall \ + __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) +#else +# define test_cc_inhibit_loop_to_libcall +#endif + +/* Used to disable stack protection in sensitive places, like ifunc + resolvers and early static TLS init. */ +#ifdef __clang__ +# define cc_inhibit_stack_protector \ + __attribute__((no_stack_protector)) +#else +# define cc_inhibit_stack_protector \ + __attribute__ ((__optimize__ ("-fno-stack-protector"))) +#endif + +#if IS_IN (testsuite) || IS_IN (testsuite_internal) +# ifdef HAVE_TEST_CC_NO_STACK_PROTECTOR +# define test_inhibit_stack_protector cc_inhibit_stack_protector +# define inhibit_stack_protector cc_inhibit_stack_protector +# else +# define test_inhibit_stack_protector +# define inhibit_stack_protector +# endif +#else +# ifdef HAVE_CC_NO_STACK_PROTECTOR +# define inhibit_stack_protector cc_inhibit_stack_protector +# else +# define test_inhibit_stack_protector +# endif +#endif + +#endif -- cgit v1.2.3