6347f4a090
When building Linux kernel, ld in bninutils 2.36 with GCC 11 generates thousands of ld: warning: orphan section `.data.event_initcall_finish' from `init/main.o' being placed in section `.data.event_initcall_finish' ld: warning: orphan section `.data.event_initcall_start' from `init/main.o' being placed in section `.data.event_initcall_start' ld: warning: orphan section `.data.event_initcall_level' from `init/main.o' being placed in section `.data.event_initcall_level' Since these sections are marked with SHF_GNU_RETAIN, they are placed in separate sections. They become orphan sections since they aren't expected in the Linux kernel linker script. But orphan sections normally don't work well with the Linux kernel linker script and the resulting kernel crashed. Add the "retain" attribute to place symbols in separate SHF_GNU_RETAIN sections. Issue a warning if the configured assembler/linker doesn't support SHF_GNU_RETAIN. gcc/ PR target/99113 * varasm.c (get_section): Replace SUPPORTS_SHF_GNU_RETAIN with looking up the retain attribute. (resolve_unique_section): Likewise. (get_variable_section): Likewise. (switch_to_section): Likewise. Warn when a symbol without the retain attribute and a symbol with the retain attribute are placed in the section with the same name, instead of the used attribute. * doc/extend.texi: Document the "retain" attribute. gcc/c-family/ PR target/99113 * c-attribs.c (c_common_attribute_table): Add the "retain" attribute. (handle_retain_attribute): New function. gcc/testsuite/ PR target/99113 * c-c++-common/attr-retain-1.c: New test. * c-c++-common/attr-retain-2.c: Likewise. * c-c++-common/attr-retain-3.c: Likewise. * c-c++-common/attr-retain-4.c: Likewise. * c-c++-common/attr-retain-5.c: Likewise. * c-c++-common/attr-retain-6.c: Likewise. * c-c++-common/attr-retain-7.c: Likewise. * c-c++-common/attr-retain-8.c: Likewise. * c-c++-common/attr-retain-9.c: Likewise. * c-c++-common/pr99113.c: Likewise. * gcc.c-torture/compile/attr-retain-1.c: Likewise. * gcc.c-torture/compile/attr-retain-2.c: Likewise. * c-c++-common/attr-used.c: Don't expect SHF_GNU_RETAIN section. * c-c++-common/attr-used-2.c: Likewise. * c-c++-common/attr-used-3.c: Likewise. * c-c++-common/attr-used-4.c: Likewise. * c-c++-common/attr-used-9.c: Likewise. * gcc.c-torture/compile/attr-used-retain-1.c: Likewise. * gcc.c-torture/compile/attr-used-retain-2.c: Likewise. * c-c++-common/attr-used-5.c: Don't expect warning for the used attribute nor SHF_GNU_RETAIN section. * c-c++-common/attr-used-6.c: Likewise. * c-c++-common/attr-used-7.c: Likewise. * c-c++-common/attr-used-8.c: Likewise. |
||
|---|---|---|
| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
| symlink-tree | ||
| test-driver | ||
| ylwrap | ||
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.