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The "persistent" attribute is used for variables that are initialized by the program loader, but are not initialized by the runtime startup code. "persistent" variables are placed in a non-volatile area of memory, which allows their value to "persist" between processor resets. gcc/c-family/ChangeLog: * c-attribs.c (handle_special_var_sec_attribute): New. (handle_noinit_attribute): Remove. (attr_noinit_exclusions): Rename to... (attr_section_exclusions): ...this, and add "persistent" attribute exclusion. (c_common_attribute_table): Add "persistent" attribute. gcc/ChangeLog: * doc/extend.texi (Common Variable Attributes): Document the "persistent" variable attribute. * doc/sourcebuild.texi (Effective-Target Keywords): Document the "persistent" effective target keyword. * tree.h (DECL_PERSISTENT_P): Define. * varasm.c (bss_initializer_p): Return false for a DECL_PERSISTENT_P decl initialized to zero. (default_section_type_flags): Handle the ".persistent" section. (default_elf_select_section): Likewise. (default_unique_section): Likewise. gcc/testsuite/ChangeLog: * gcc.c-torture/execute/noinit-attribute.c: Moved to... * c-c++-common/torture/attr-noinit-main.inc: ...here. * lib/target-supports.exp (check_effective_target_persistent): New. * c-c++-common/torture/attr-noinit-1.c: New test. * c-c++-common/torture/attr-noinit-2.c: New test. * c-c++-common/torture/attr-noinit-3.c: New test. * c-c++-common/torture/attr-noinit-invalid.c: New test. * c-c++-common/torture/attr-persistent-1.c: New test. * c-c++-common/torture/attr-persistent-2.c: New test. * c-c++-common/torture/attr-persistent-3.c: New test. * c-c++-common/torture/attr-persistent-invalid.c: New test. * c-c++-common/torture/attr-persistent-main.inc: New test. |
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| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| 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 | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.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.