diff options
| -rw-r--r-- | sysdeps/aarch64/morello/crti.S | 93 | ||||
| -rw-r--r-- | sysdeps/aarch64/morello/crtn.S | 48 |
2 files changed, 141 insertions, 0 deletions
diff --git a/sysdeps/aarch64/morello/crti.S b/sysdeps/aarch64/morello/crti.S new file mode 100644 index 0000000000..b8b201031b --- /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 index 0000000000..f405accee1 --- /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 |