d915a14ef0
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
266 lines
5.8 KiB
C
266 lines
5.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1998 John D. Polstra
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* All rights reserved.
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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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#if !defined(IN_LIBDL) || defined(PIC)
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/*
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* Linkage to services provided by the dynamic linker.
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*/
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#include <sys/mman.h>
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#include <dlfcn.h>
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#include <link.h>
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#include <stddef.h>
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#include "namespace.h"
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#include <pthread.h>
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#include "un-namespace.h"
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#include "libc_private.h"
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static char sorry[] = "Service unavailable";
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void _rtld_thread_init(void *);
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void _rtld_atfork_pre(int *);
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void _rtld_atfork_post(int *);
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/*
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* For ELF, the dynamic linker directly resolves references to its
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* services to functions inside the dynamic linker itself. These
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* weak-symbol stubs are necessary so that "ld" won't complain about
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* undefined symbols. The stubs are executed only when the program is
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* linked statically, or when a given service isn't implemented in the
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* dynamic linker. They must return an error if called, and they must
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* be weak symbols so that the dynamic linker can override them.
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*/
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#pragma weak _rtld_error
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void
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_rtld_error(const char *fmt __unused, ...)
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{
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}
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#pragma weak dladdr
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int
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dladdr(const void *addr __unused, Dl_info *dlip __unused)
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{
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_rtld_error(sorry);
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return (0);
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}
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#pragma weak dlclose
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int
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dlclose(void *handle __unused)
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{
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_rtld_error(sorry);
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return (-1);
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}
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#pragma weak dlerror
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char *
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dlerror(void)
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{
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return (sorry);
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}
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#pragma weak dllockinit
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void
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dllockinit(void *context,
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void *(*lock_create)(void *context) __unused,
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void (*rlock_acquire)(void *lock) __unused,
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void (*wlock_acquire)(void *lock) __unused,
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void (*lock_release)(void *lock) __unused,
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void (*lock_destroy)(void *lock) __unused,
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void (*context_destroy)(void *context) __unused)
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{
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if (context_destroy != NULL)
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context_destroy(context);
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}
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#pragma weak dlopen
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void *
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dlopen(const char *name __unused, int mode __unused)
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{
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_rtld_error(sorry);
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return (NULL);
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}
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#pragma weak dlsym
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void *
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dlsym(void * __restrict handle __unused, const char * __restrict name __unused)
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{
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_rtld_error(sorry);
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return (NULL);
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}
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#pragma weak dlfunc
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dlfunc_t
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dlfunc(void * __restrict handle __unused, const char * __restrict name __unused)
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{
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_rtld_error(sorry);
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return (NULL);
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}
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#pragma weak dlvsym
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void *
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dlvsym(void * __restrict handle __unused, const char * __restrict name __unused,
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const char * __restrict version __unused)
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{
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_rtld_error(sorry);
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return (NULL);
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}
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#pragma weak dlinfo
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int
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dlinfo(void * __restrict handle __unused, int request __unused,
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void * __restrict p __unused)
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{
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_rtld_error(sorry);
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return (0);
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}
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#pragma weak _rtld_thread_init
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void
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_rtld_thread_init(void *li __unused)
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{
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_rtld_error(sorry);
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}
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#ifndef IN_LIBDL
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static pthread_once_t dl_phdr_info_once = PTHREAD_ONCE_INIT;
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static struct dl_phdr_info phdr_info;
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static void
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dl_init_phdr_info(void)
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{
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Elf_Auxinfo *auxp;
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unsigned int i;
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for (auxp = __elf_aux_vector; auxp->a_type != AT_NULL; auxp++) {
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switch (auxp->a_type) {
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case AT_BASE:
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phdr_info.dlpi_addr = (Elf_Addr)auxp->a_un.a_ptr;
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break;
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case AT_EXECPATH:
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phdr_info.dlpi_name = (const char *)auxp->a_un.a_ptr;
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break;
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case AT_PHDR:
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phdr_info.dlpi_phdr =
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(const Elf_Phdr *)auxp->a_un.a_ptr;
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break;
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case AT_PHNUM:
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phdr_info.dlpi_phnum = (Elf_Half)auxp->a_un.a_val;
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break;
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}
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}
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for (i = 0; i < phdr_info.dlpi_phnum; i++) {
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if (phdr_info.dlpi_phdr[i].p_type == PT_TLS) {
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phdr_info.dlpi_tls_modid = 1;
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phdr_info.dlpi_tls_data =
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(void*)phdr_info.dlpi_phdr[i].p_vaddr;
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}
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}
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phdr_info.dlpi_adds = 1;
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}
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#endif
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#pragma weak dl_iterate_phdr
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int
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dl_iterate_phdr(int (*callback)(struct dl_phdr_info *, size_t, void *) __unused,
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void *data __unused)
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{
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#ifndef IN_LIBDL
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__init_elf_aux_vector();
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if (__elf_aux_vector == NULL)
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return (1);
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_once(&dl_phdr_info_once, dl_init_phdr_info);
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return (callback(&phdr_info, sizeof(phdr_info), data));
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#else
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return (0);
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#endif
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}
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#pragma weak fdlopen
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void *
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fdlopen(int fd __unused, int mode __unused)
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{
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_rtld_error(sorry);
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return (NULL);
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}
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#pragma weak _rtld_atfork_pre
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void
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_rtld_atfork_pre(int *locks __unused)
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{
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}
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#pragma weak _rtld_atfork_post
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void
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_rtld_atfork_post(int *locks __unused)
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{
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}
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#pragma weak _rtld_addr_phdr
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int
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_rtld_addr_phdr(const void *addr __unused,
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struct dl_phdr_info *phdr_info_a __unused)
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{
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return (0);
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}
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#pragma weak _rtld_get_stack_prot
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int
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_rtld_get_stack_prot(void)
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{
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return (PROT_EXEC | PROT_READ | PROT_WRITE);
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}
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#pragma weak _rtld_is_dlopened
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int
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_rtld_is_dlopened(void *arg __unused)
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{
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return (0);
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}
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#endif /* !defined(IN_LIBDL) || defined(PIC) */
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