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//===-- 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>
#ifndef __has_feature
# define __has_feature(x) 0
#endif
#if __has_feature(ptrauth_init_fini)
#include <ptrauth.h>
#endif
__attribute__((visibility("hidden"))) void *__dso_handle = &__dso_handle;
#ifdef EH_USE_FRAME_REGISTRY
__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));
#endif
#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(void) {
static _Bool __initialized;
if (__builtin_expect(__initialized, 0))
return;
__initialized = 1;
#ifdef EH_USE_FRAME_REGISTRY
static struct { void *p[8]; } __object;
if (__register_frame_info)
__register_frame_info(__EH_FRAME_LIST__, &__object);
#endif
#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
# if __has_feature(ptrauth_init_fini)
// TODO: use __ptrauth-qualified pointers when they are supported on clang side
# if __has_feature(ptrauth_init_fini_address_discrimination)
__attribute__((section(".init_array"), used)) static void *__init =
ptrauth_sign_constant(&__do_init, ptrauth_key_init_fini_pointer,
ptrauth_blend_discriminator(
&__init, __ptrauth_init_fini_discriminator));
# else
__attribute__((section(".init_array"), used)) static void *__init =
ptrauth_sign_constant(&__do_init, ptrauth_key_init_fini_pointer,
__ptrauth_init_fini_discriminator);
# endif
# elif __has_feature(ptrauth_calls)
# ifdef __aarch64__
// If ptrauth_init_fini feature is not present, compiler emits raw unsigned
// pointers in .init_array. Use inline assembly to avoid implicit signing of
// __do_init function pointer with ptrauth_calls enabled.
__asm__(".pushsection .init_array,\"aw\",@init_array\n\t"
".xword __do_init\n\t"
".popsection");
# else
# error "ptrauth_calls is only supported for AArch64"
# endif
# else
__attribute__((section(".init_array"),
used)) static void (*__init)(void) = __do_init;
# endif
#elif defined(__i386__) || defined(__x86_64__)
__asm__(".pushsection .init,\"ax\",@progbits\n\t"
"call __do_init\n\t"
".popsection");
#elif defined(__riscv)
__asm__(".pushsection .init,\"ax\",%progbits\n\t"
"call __do_init\n\t"
".popsection");
#elif defined(__arm__) || defined(__aarch64__)
__asm__(".pushsection .init,\"ax\",%progbits\n\t"
"bl __do_init\n\t"
".popsection");
#elif defined(__mips__)
__asm__(".pushsection .init,\"ax\",@progbits\n\t"
"jal __do_init\n\t"
".popsection");
#elif defined(__powerpc__) || defined(__powerpc64__)
__asm__(".pushsection .init,\"ax\",@progbits\n\t"
"bl __do_init\n\t"
"nop\n\t"
".popsection");
#elif defined(__sparc__)
__asm__(".pushsection .init,\"ax\",@progbits\n\t"
"call __do_init\n\t"
".popsection");
#else
#error "crtbegin without .init_fini array unimplemented for this architecture"
#endif // CRT_HAS_INITFINI_ARRAY
#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(void) {
static _Bool __finalized;
if (__builtin_expect(__finalized, 0))
return;
__finalized = 1;
if (__cxa_finalize)
__cxa_finalize(__dso_handle);
#ifndef CRT_HAS_INITFINI_ARRAY
const size_t n = __DTOR_LIST_END__ - __DTOR_LIST__ - 1;
for (size_t i = 1; i <= n; i++) __DTOR_LIST__[i]();
#endif
#ifdef EH_USE_FRAME_REGISTRY
if (__deregister_frame_info)
__deregister_frame_info(__EH_FRAME_LIST__);
#endif
}
#ifdef CRT_HAS_INITFINI_ARRAY
# if __has_feature(ptrauth_init_fini)
// TODO: use __ptrauth-qualified pointers when they are supported on clang side
# if __has_feature(ptrauth_init_fini_address_discrimination)
__attribute__((section(".fini_array"), used)) static void *__fini =
ptrauth_sign_constant(&__do_fini, ptrauth_key_init_fini_pointer,
ptrauth_blend_discriminator(
&__fini, __ptrauth_init_fini_discriminator));
# else
__attribute__((section(".fini_array"), used)) static void *__fini =
ptrauth_sign_constant(&__do_fini, ptrauth_key_init_fini_pointer,
__ptrauth_init_fini_discriminator);
# endif
# elif __has_feature(ptrauth_calls)
# ifdef __aarch64__
// If ptrauth_init_fini feature is not present, compiler emits raw unsigned
// pointers in .fini_array. Use inline assembly to avoid implicit signing of
// __do_fini function pointer with ptrauth_calls enabled.
__asm__(".pushsection .fini_array,\"aw\",@fini_array\n\t"
".xword __do_fini\n\t"
".popsection");
# else
# error "ptrauth_calls is only supported for AArch64"
# endif
# else
__attribute__((section(".fini_array"),
used)) static void (*__fini)(void) = __do_fini;
# endif
#elif defined(__i386__) || defined(__x86_64__)
__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
"call __do_fini\n\t"
".popsection");
#elif defined(__arm__) || defined(__aarch64__)
__asm__(".pushsection .fini,\"ax\",%progbits\n\t"
"bl __do_fini\n\t"
".popsection");
#elif defined(__mips__)
__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
"jal __do_fini\n\t"
".popsection");
#elif defined(__powerpc__) || defined(__powerpc64__)
__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
"bl __do_fini\n\t"
"nop\n\t"
".popsection");
#elif defined(__riscv)
__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
"call __do_fini\n\t"
".popsection");
#elif defined(__sparc__)
__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
"call __do_fini\n\t"
".popsection");
#else
#error "crtbegin without .init_fini array unimplemented for this architecture"
#endif // CRT_HAS_INIT_FINI_ARRAY
|
