98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
//===-- crtbegin.c - Start of constructors and destructors ----------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include <stddef.h>
|
|
|
|
__attribute__((visibility("hidden"))) void *__dso_handle = &__dso_handle;
|
|
|
|
__extension__ static void *__EH_FRAME_LIST__[]
|
|
__attribute__((section(".eh_frame"), aligned(sizeof(void *)))) = {};
|
|
|
|
extern void __register_frame_info(const void *, void *) __attribute__((weak));
|
|
extern void *__deregister_frame_info(const void *) __attribute__((weak));
|
|
|
|
#ifndef CRT_HAS_INITFINI_ARRAY
|
|
typedef void (*fp)(void);
|
|
|
|
static fp __CTOR_LIST__[]
|
|
__attribute__((section(".ctors"), aligned(sizeof(fp)))) = {(fp)-1};
|
|
extern fp __CTOR_LIST_END__[];
|
|
#endif
|
|
|
|
extern void __cxa_finalize(void *) __attribute__((weak));
|
|
|
|
static void __attribute__((used)) __do_init() {
|
|
static _Bool __initialized;
|
|
if (__builtin_expect(__initialized, 0))
|
|
return;
|
|
__initialized = 1;
|
|
|
|
static struct { void *p[8]; } __object;
|
|
if (__register_frame_info)
|
|
__register_frame_info(__EH_FRAME_LIST__, &__object);
|
|
|
|
#ifndef CRT_HAS_INITFINI_ARRAY
|
|
const size_t n = __CTOR_LIST_END__ - __CTOR_LIST__ - 1;
|
|
for (size_t i = n; i >= 1; i--) __CTOR_LIST__[i]();
|
|
#endif
|
|
}
|
|
|
|
#ifdef CRT_HAS_INITFINI_ARRAY
|
|
__attribute__((section(".init_array"),
|
|
used)) static void (*__init)(void) = __do_init;
|
|
#else // CRT_HAS_INITFINI_ARRAY
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
__asm__(".pushsection .init,\"ax\",@progbits\n\t"
|
|
"call " __USER_LABEL_PREFIX__ "__do_init\n\t"
|
|
".popsection");
|
|
#elif defined(__arm__)
|
|
__asm__(".pushsection .init,\"ax\",%progbits\n\t"
|
|
"bl " __USER_LABEL_PREFIX__ "__do_init\n\t"
|
|
".popsection");
|
|
#endif // CRT_HAS_INITFINI_ARRAY
|
|
#endif
|
|
|
|
#ifndef CRT_HAS_INITFINI_ARRAY
|
|
static fp __DTOR_LIST__[]
|
|
__attribute__((section(".dtors"), aligned(sizeof(fp)))) = {(fp)-1};
|
|
extern fp __DTOR_LIST_END__[];
|
|
#endif
|
|
|
|
static void __attribute__((used)) __do_fini() {
|
|
static _Bool __finalized;
|
|
if (__builtin_expect(__finalized, 0))
|
|
return;
|
|
__finalized = 1;
|
|
|
|
if (__cxa_finalize)
|
|
__cxa_finalize(__dso_handle);
|
|
|
|
#ifndef CRT_HAS_INITFINI_ARRAY
|
|
if (__deregister_frame_info)
|
|
__deregister_frame_info(__EH_FRAME_LIST__);
|
|
|
|
const size_t n = __DTOR_LIST_END__ - __DTOR_LIST__ - 1;
|
|
for (size_t i = 1; i <= n; i++) __DTOR_LIST__[i]();
|
|
#endif
|
|
}
|
|
|
|
#ifdef CRT_HAS_INITFINI_ARRAY
|
|
__attribute__((section(".fini_array"),
|
|
used)) static void (*__fini)(void) = __do_fini;
|
|
#else // CRT_HAS_INITFINI_ARRAY
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
|
|
"call " __USER_LABEL_PREFIX__ "__do_fini\n\t"
|
|
".popsection");
|
|
#elif defined(__arm__)
|
|
__asm__(".pushsection .fini,\"ax\",%progbits\n\t"
|
|
"bl " __USER_LABEL_PREFIX__ "__do_fini\n\t"
|
|
".popsection");
|
|
#endif
|
|
#endif // CRT_HAS_INIT_FINI_ARRAY
|