99282790b7
The ELF notes compiled in C were placed in a section with the wrong type (SHT_PROGBITS instead of SHT_NOTE). Previously, sed was used on the generated assembly to rewrite the section type. Instead, write the notes in assembly which permits setting the correct section type directly. While here, move inline assembly entry points out of C and into assembly for aarch64, arm, and riscv. Reviewed by: kib Tested on: amd64 (cirrus-ci), riscv64 Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D25211
141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-1-Clause
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*
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* Copyright 2012 Konstantin Belousov <kib@FreeBSD.org>
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* Copyright (c) 2018 The FreeBSD Foundation
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*
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* Parts of this software was developed by Konstantin Belousov
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* <kib@FreeBSD.org> under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/elf.h>
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#include <sys/elf_common.h>
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extern int main(int, char **, char **);
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extern void (*__preinit_array_start[])(int, char **, char **) __hidden;
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extern void (*__preinit_array_end[])(int, char **, char **) __hidden;
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extern void (*__init_array_start[])(int, char **, char **) __hidden;
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extern void (*__init_array_end[])(int, char **, char **) __hidden;
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extern void (*__fini_array_start[])(void) __hidden;
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extern void (*__fini_array_end[])(void) __hidden;
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extern void _fini(void) __hidden;
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extern void _init(void) __hidden;
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extern int _DYNAMIC;
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#pragma weak _DYNAMIC
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#if defined(CRT_IRELOC_RELA)
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extern const Elf_Rela __rela_iplt_start[] __weak_symbol __hidden;
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extern const Elf_Rela __rela_iplt_end[] __weak_symbol __hidden;
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#include "reloc.c"
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static void
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process_irelocs(void)
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{
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const Elf_Rela *r;
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for (r = &__rela_iplt_start[0]; r < &__rela_iplt_end[0]; r++)
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crt1_handle_rela(r);
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}
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#elif defined(CRT_IRELOC_REL)
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extern const Elf_Rel __rel_iplt_start[] __weak_symbol __hidden;
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extern const Elf_Rel __rel_iplt_end[] __weak_symbol __hidden;
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#include "reloc.c"
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static void
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process_irelocs(void)
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{
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const Elf_Rel *r;
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for (r = &__rel_iplt_start[0]; r < &__rel_iplt_end[0]; r++)
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crt1_handle_rel(r);
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}
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#elif defined(CRT_IRELOC_SUPPRESS)
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#else
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#error "Define platform reloc type"
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#endif
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char **environ;
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const char *__progname = "";
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static void
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finalizer(void)
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{
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void (*fn)(void);
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size_t array_size, n;
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array_size = __fini_array_end - __fini_array_start;
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for (n = array_size; n > 0; n--) {
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fn = __fini_array_start[n - 1];
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if ((uintptr_t)fn != 0 && (uintptr_t)fn != 1)
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(fn)();
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}
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_fini();
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}
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static inline void
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handle_static_init(int argc, char **argv, char **env)
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{
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void (*fn)(int, char **, char **);
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size_t array_size, n;
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if (&_DYNAMIC != NULL)
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return;
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atexit(finalizer);
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array_size = __preinit_array_end - __preinit_array_start;
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for (n = 0; n < array_size; n++) {
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fn = __preinit_array_start[n];
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if ((uintptr_t)fn != 0 && (uintptr_t)fn != 1)
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fn(argc, argv, env);
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}
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_init();
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array_size = __init_array_end - __init_array_start;
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for (n = 0; n < array_size; n++) {
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fn = __init_array_start[n];
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if ((uintptr_t)fn != 0 && (uintptr_t)fn != 1)
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fn(argc, argv, env);
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}
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}
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static inline void
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handle_argv(int argc, char *argv[], char **env)
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{
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const char *s;
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if (environ == NULL)
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environ = env;
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if (argc > 0 && argv[0] != NULL) {
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__progname = argv[0];
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for (s = __progname; *s != '\0'; s++) {
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if (*s == '/')
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__progname = s + 1;
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}
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}
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}
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