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config/ Sync from gcc 2020-07-15 H.J. Lu <hjl.tools@gmail.com> PR bootstrap/96202 * cet.m4 (GCC_CET_HOST_FLAGS): Don't enable CET without CET support in stage1 nor for build support. libiberty/ * configure: Regenerate. Sync from gcc 2020-09-08 Alan Modra <amodra@gmail.com> * d-demangle.c: Include limits.h. (ULONG_MAX, UINT_MAX): Provide fall-back definition. (dlang_number): Simplify and correct overflow test. Only write *ret on returning non-NULL. Make "ret" an unsigned long*. Only succeed for result of [0,UINT_MAX]. (dlang_decode_backref): Simplify and correct overflow test. Only write *ret on returning non-NULL. Only succeed for result [1,MAX_LONG]. (dlang_backref): Remove now unnecessary range check. (dlang_symbol_name_p): Likewise. (string_need): Take a size_t n arg, and use size_t tem. (string_append): Use size_t n. (string_appendn, string_prependn): Take a size_t n arg. (TEMPLATE_LENGTH_UNKNOWN): Define as -1UL. (dlang_lname, dlang_parse_template): Take an unsigned long len arg. (dlang_symbol_backref, dlang_identifier, dlang_parse_integer), (dlang_parse_integer, dlang_parse_string), (dlang_parse_arrayliteral, dlang_parse_assocarray), (dlang_parse_structlit, dlang_parse_tuple), (dlang_template_symbol_param, dlang_template_args): Use unsigned long variables. * testsuite/d-demangle-expected: Add new tests. 2020-08-04 Iain Buclaw <ibuclaw@gdcproject.org> * d-demangle.c (dlang_function_args): Handle 'in' and 'in ref' parameter storage classes. (dlang_type): Remove identifier type. * testsuite/d-demangle-expected: Update tests. 2020-08-03 Richard Biener <rguenther@suse.de> PR lto/96385 * simple-object-elf.c (simple_object_elf_copy_lto_debug_sections): Localize global UNDEFs and reuse the prevailing name. 2020-07-10 Ian Lance Taylor <iant@golang.org> PR demangler/96143 * cp-demangle.c (d_lambda): Don't add substitution candidate. * testsuite/demangle-expected: Update a few existing test cases accordingly, and add a new test case. 2020-07-04 Jason Merrill <jason@redhat.com> * cp-demangle.c (cplus_demangle_operators): Add di, dx, dX. (d_expression_1): Handle di and dX. (is_designated_init, d_maybe_print_designated_init): New. (d_print_comp_inner): Use d_maybe_print_designated_init. * testsuite/demangle-expected: Add designator tests. 2020-06-25 Nick Clifton <nickc@redhat.com> * bsearch.c (bsearch): Remove use of register keyword. * bsearch_r.c (bsearch_r): Likewise.
179 lines
3.6 KiB
Plaintext
179 lines
3.6 KiB
Plaintext
dnl
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dnl GCC_CET_FLAGS
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dnl (SHELL-CODE_HANDLER)
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dnl
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AC_DEFUN([GCC_CET_FLAGS],[dnl
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GCC_ENABLE(cet, auto, ,[enable Intel CET in target libraries],
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permit yes|no|auto)
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AC_MSG_CHECKING([for CET support])
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# NB: Avoid nested save_CFLAGS and save_LDFLAGS.
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case "$host" in
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i[[34567]]86-*-linux* | x86_64-*-linux*)
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case "$enable_cet" in
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auto)
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# Check if target supports multi-byte NOPs
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# and if compiler and assembler support CET insn.
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cet_save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -fcf-protection"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[],
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[
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#if !defined(__SSE2__)
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#error target does not support multi-byte NOPs
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#else
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asm ("setssbsy");
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#endif
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])],
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[enable_cet=yes],
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[enable_cet=no])
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CFLAGS="$cet_save_CFLAGS"
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;;
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yes)
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# Check if assembler supports CET.
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[],
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[asm ("setssbsy");])],
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[],
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[AC_MSG_ERROR([assembler with CET support is required for --enable-cet])])
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;;
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esac
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;;
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*)
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enable_cet=no
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;;
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esac
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if test x$enable_cet = xyes; then
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$1="-fcf-protection -mshstk"
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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fi
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])
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dnl
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dnl GCC_CET_HOST_FLAGS
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dnl (SHELL-CODE_HANDLER)
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dnl
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AC_DEFUN([GCC_CET_HOST_FLAGS],[dnl
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GCC_ENABLE(cet, auto, ,[enable Intel CET in host libraries],
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permit yes|no|auto)
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AC_MSG_CHECKING([for CET support])
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case "$host" in
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i[[34567]]86-*-linux* | x86_64-*-linux*)
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may_have_cet=yes
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cet_save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -fcf-protection"
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case "$enable_cet" in
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auto)
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# Check if target supports multi-byte NOPs
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# and if compiler and assembler support CET.
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[],
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[
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#if !defined(__SSE2__)
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#error target does not support multi-byte NOPs
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#else
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asm ("setssbsy");
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#endif
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])],
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[enable_cet=yes],
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[enable_cet=no])
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;;
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yes)
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# Check if compiler and assembler support CET.
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[],
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[asm ("setssbsy");])],
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[support_cet=yes],
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[support_cet=no])
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if test $support_cet = "no"; then
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if test x$enable_bootstrap != xno \
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&& test -z "${with_build_subdir}" \
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&& (test ! -f ../stage_current \
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|| test `cat ../stage_current` != "stage1"); then
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# Require CET support only for the final GCC build.
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AC_MSG_ERROR([compiler and assembler with CET support are required for --enable-cet])
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else
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# Don't enable CET without CET support for non-bootstrap
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# build, in stage1 nor for build support.
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enable_cet=no
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fi
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fi
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;;
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esac
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CFLAGS="$cet_save_CFLAGS"
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;;
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*)
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may_have_cet=no
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enable_cet=no
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;;
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esac
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cet_save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -fcf-protection=none"
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cet_save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -Wl,-z,ibt,-z,shstk"
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if test x$may_have_cet = xyes; then
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# Check whether -fcf-protection=none -Wl,-z,ibt,-z,shstk work.
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AC_TRY_LINK(
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[],[return 0;],
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[may_have_cet=yes],
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[may_have_cet=no])
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fi
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if test x$may_have_cet = xyes; then
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if test x$cross_compiling = xno; then
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AC_TRY_RUN([
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static void
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foo (void)
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{
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}
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static void
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__attribute__ ((noinline, noclone))
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xxx (void (*f) (void))
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{
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f ();
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}
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static void
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__attribute__ ((noinline, noclone))
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bar (void)
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{
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xxx (foo);
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}
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int
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main ()
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{
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bar ();
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return 0;
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}
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],
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[have_cet=no],
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[have_cet=yes])
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if test x$enable_cet = xno -a x$have_cet = xyes; then
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AC_MSG_ERROR([Intel CET must be enabled on Intel CET enabled host])
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fi
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fi
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else
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# Enable CET in cross compiler if possible so that it will run on both
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# CET and non-CET hosts.
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have_cet=yes
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fi
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if test x$enable_cet = xyes; then
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$1="-fcf-protection"
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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fi
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CFLAGS="$cet_save_CFLAGS"
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LDFLAGS="$cet_save_LDFLAGS"
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])
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