aarch64: morello: purecap crti.S and crtn.S

Purecap ABI versions of crti.S and crtn.S.

diff --git a/sysdeps/aarch64/morello/crti.S b/sysdeps/aarch64/morello/crti.S
new file mode 100644 (file)
index 0000000..b8b2010
--- /dev/null
+++ b/sysdeps/aarch64/morello/crti.S
@@ -0,0 +1,93 @@
+/* Special .init and .fini section support for Morello.
+   Copyright (C) 1995-2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+/* crti.S puts a function prologue at the beginning of the .init and
+   .fini sections and defines global symbols for those addresses, so
+   they can be called as functions.  The symbols _init and _fini are
+   magic and cause the linker to emit DT_INIT and DT_FINI.  */
+
+#include <sysdep.h>
+#include <libc-symbols.h>
+
+#ifndef PREINIT_FUNCTION
+# define PREINIT_FUNCTION __gmon_start__
+#endif
+
+#ifndef PREINIT_FUNCTION_WEAK
+# define PREINIT_FUNCTION_WEAK 1
+#endif
+
+#if PREINIT_FUNCTION_WEAK
+       weak_extern (PREINIT_FUNCTION)
+#else
+       .hidden PREINIT_FUNCTION
+#endif
+
+#if PREINIT_FUNCTION_WEAK
+       .align  2
+       .type   call_weak_fn, %function
+call_weak_fn:
+       adrp    c0, :got:PREINIT_FUNCTION
+       ldr     c0, [c0, #:got_lo12:PREINIT_FUNCTION]
+       cbz     x0, 1f
+       b       PREINIT_FUNCTION
+1:
+       RET
+       .size   call_weak_fn, .-call_weak_fn
+#endif
+
+       .section .init,"ax",%progbits
+       .align  2
+       .global _init
+       .hidden _init
+       .type   _init, %function
+_init:
+       stp     c29, c30, [csp, -32]!
+       mov     c29, csp
+#if PREINIT_FUNCTION_WEAK
+       bl      call_weak_fn
+#else
+       bl      PREINIT_FUNCTION
+#endif
+
+       .section        .fini,"ax",%progbits
+       .align  2
+       .global _fini
+       .hidden _fini
+       .type   _fini, %function
+_fini:
+       stp     c29, c30, [csp, -32]!
+       mov     c29, csp

diff --git a/sysdeps/aarch64/morello/crtn.S b/sysdeps/aarch64/morello/crtn.S
new file mode 100644 (file)
index 0000000..f405acc
--- /dev/null
+++ b/sysdeps/aarch64/morello/crtn.S
@@ -0,0 +1,48 @@
+/* Special .init and .fini section support for Morello.
+   Copyright (C) 1995-2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+/* crtn.S puts function epilogues in the .init and .fini sections
+   corresponding to the prologues in crti.S. */
+
+#include <sysdep.h>
+
+       .section .init,"ax",%progbits
+       ldp     c29, c30, [csp], 32
+       RET
+
+       .section .fini,"ax",%progbits
+       ldp     c29, c30, [csp], 32
+       RET