+2013-03-12 Roland McGrath <roland@hack.frob.com>
+
+ * sysdeps/init_array/elf-init.c: New file.
+ * csu/elf-init.c
+ (__libc_csu_init) [!NO_INITFINI]: Conditionalize _init call on this.
+ (__libc_csu_fini) [!NO_INITFINI]: Conditionalize _fini call on this.
+
+ * csu/gmon-start.c [GMON_START_ARRAY_SECTION]: Don't define
+ __gmon_start__ as global, but as static with a .preinit_array pointer.
+ * sysdeps/init_array/gmon-start.c: New file. Use that.
+ * sysdeps/init_array/crti.S: New file, empty except for comments.
+ * sysdeps/init_array/crtn.S: Likewise.
+
2013-03-11 Ondřej Bílka <neleai@seznam.cz>
* sysdeps/x86_64/memset.S: Remove USE_MULTIARCH conditional for
extern void (*__fini_array_end []) (void) attribute_hidden;
+#ifndef NO_INITFINI
/* These function symbols are provided for the .init/.fini section entry
points automagically by the linker. */
extern void _init (void);
extern void _fini (void);
+#endif
+
/* These functions are passed to __libc_start_main by the startup code.
These get statically linked into each program. For dynamically linked
}
#endif
+#ifndef NO_INITFINI
_init ();
+#endif
const size_t size = __init_array_end - __init_array_start;
for (size_t i = 0; i < size; i++)
while (i-- > 0)
(*__fini_array_start [i]) ();
+# ifndef NO_INITFINI
_fini ();
+# endif
#endif
}
# endif
#endif
+#ifdef GMON_START_ARRAY_SECTION
+static void __gmon_start__ (void);
+static void (*const gmon_start_initializer) (void)
+ __attribute__ ((used, section (GMON_START_ARRAY_SECTION))) = &__gmon_start__;
+static
+#else
/* We cannot use the normal constructor mechanism to call
__gmon_start__ because gcrt1.o appears before crtbegin.o in the link.
Instead crti.o calls it specially. */
extern void __gmon_start__ (void);
+#endif
void
__gmon_start__ (void)
--- /dev/null
+/* Dummy crti file.
+
+ In this configuration, crti.o and crtn.o are both empty because the
+ .init_array/.fini_array sections are used exclusively.
+
+ Older ports cannot use this because even if the linker used to
+ build libc itself has .init_array support, we don't want to produce
+ a crt[in].o that presume a linker that new will be used to link
+ other things later.
+
+ But new configurations without compatibility concerns for
+ toolchains without .init_array support can use this to avoid the
+ superfluous .init and .fini boilerplate code. */
--- /dev/null
+/* Dummy crtn file.
+
+ In this configuration, crti.o and crtn.o are both empty because the
+ .init_array/.fini_array sections are used exclusively.
+
+ Older ports cannot use this because even if the linker used to
+ build libc itself has .init_array support, we don't want to produce
+ a crt[in].o that presume a linker that new will be used to link
+ other things later.
+
+ But new configurations without compatibility concerns for
+ toolchains without .init_array support can use this to avoid the
+ superfluous .init and .fini boilerplate code. */
--- /dev/null
+/* Startup support for ELF initializers/finalizers in the main executable.
+ Copyright (C) 2013 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.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The GNU Lesser General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
+ Note that people who make modified versions of this file are not
+ obligated to grant this special exception for their modified
+ versions; it is their choice whether to do so. The GNU Lesser
+ General Public License gives permission to release a modified
+ version without this exception; this exception also makes it
+ possible to release a modified version which carries forward this
+ exception.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+#define NO_INITFINI
+#include <csu/elf-init.c>
--- /dev/null
+/* gmon startup hook using .preinit_array.
+ Copyright (C) 2013 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.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The GNU Lesser General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
+ Note that people who make modified versions of this file are not
+ obligated to grant this special exception for their modified
+ versions; it is their choice whether to do so. The GNU Lesser
+ General Public License gives permission to release a modified
+ version without this exception; this exception also makes it
+ possible to release a modified version which carries forward this
+ exception.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+/* Instead of defining __gmon_start__ globally in gcrt1.o, we make it
+ static and just put a pointer to it into the .preinit_array section. */
+
+#define GMON_START_ARRAY_SECTION ".preinit_array"
+
+#include <csu/gmon-start.c>