128 lines
4.2 KiB
C
128 lines
4.2 KiB
C
//===-- crtbegin.c - Start of constructors and destructors ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <stddef.h>
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__attribute__((visibility("hidden"))) void *__dso_handle = &__dso_handle;
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#ifdef EH_USE_FRAME_REGISTRY
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__extension__ static void *__EH_FRAME_LIST__[]
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__attribute__((section(".eh_frame"), aligned(sizeof(void *)))) = {};
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extern void __register_frame_info(const void *, void *) __attribute__((weak));
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extern void *__deregister_frame_info(const void *) __attribute__((weak));
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#endif
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#ifndef CRT_HAS_INITFINI_ARRAY
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typedef void (*fp)(void);
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static fp __CTOR_LIST__[]
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__attribute__((section(".ctors"), aligned(sizeof(fp)))) = {(fp)-1};
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extern fp __CTOR_LIST_END__[];
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#endif
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extern void __cxa_finalize(void *) __attribute__((weak));
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static void __attribute__((used)) __do_init() {
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static _Bool __initialized;
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if (__builtin_expect(__initialized, 0))
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return;
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__initialized = 1;
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#ifdef EH_USE_FRAME_REGISTRY
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static struct { void *p[8]; } __object;
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if (__register_frame_info)
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__register_frame_info(__EH_FRAME_LIST__, &__object);
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#endif
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#ifndef CRT_HAS_INITFINI_ARRAY
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const size_t n = __CTOR_LIST_END__ - __CTOR_LIST__ - 1;
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for (size_t i = n; i >= 1; i--) __CTOR_LIST__[i]();
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#endif
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}
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#ifdef CRT_HAS_INITFINI_ARRAY
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__attribute__((section(".init_array"),
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used)) static void (*__init)(void) = __do_init;
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#elif defined(__i386__) || defined(__x86_64__)
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__asm__(".pushsection .init,\"ax\",@progbits\n\t"
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"call " __USER_LABEL_PREFIX__ "__do_init\n\t"
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".popsection");
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#elif defined(__riscv)
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__asm__(".pushsection .init,\"ax\",%progbits\n\t"
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"call " __USER_LABEL_PREFIX__ "__do_init\n\t"
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".popsection");
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#elif defined(__arm__) || defined(__aarch64__)
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__asm__(".pushsection .init,\"ax\",%progbits\n\t"
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"bl " __USER_LABEL_PREFIX__ "__do_init\n\t"
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".popsection");
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#elif defined(__powerpc__) || defined(__powerpc64__)
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__asm__(".pushsection .init,\"ax\",@progbits\n\t"
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"bl " __USER_LABEL_PREFIX__ "__do_init\n\t"
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"nop\n\t"
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".popsection");
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#elif defined(__sparc__)
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__asm__(".pushsection .init,\"ax\",@progbits\n\t"
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"call " __USER_LABEL_PREFIX__ "__do_init\n\t"
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".popsection");
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#else
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#error "crtbegin without .init_fini array unimplemented for this architecture"
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#endif // CRT_HAS_INITFINI_ARRAY
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#ifndef CRT_HAS_INITFINI_ARRAY
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static fp __DTOR_LIST__[]
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__attribute__((section(".dtors"), aligned(sizeof(fp)))) = {(fp)-1};
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extern fp __DTOR_LIST_END__[];
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#endif
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static void __attribute__((used)) __do_fini() {
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static _Bool __finalized;
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if (__builtin_expect(__finalized, 0))
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return;
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__finalized = 1;
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if (__cxa_finalize)
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__cxa_finalize(__dso_handle);
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#ifndef CRT_HAS_INITFINI_ARRAY
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const size_t n = __DTOR_LIST_END__ - __DTOR_LIST__ - 1;
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for (size_t i = 1; i <= n; i++) __DTOR_LIST__[i]();
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#endif
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#ifdef EH_USE_FRAME_REGISTRY
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if (__deregister_frame_info)
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__deregister_frame_info(__EH_FRAME_LIST__);
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#endif
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}
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#ifdef CRT_HAS_INITFINI_ARRAY
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__attribute__((section(".fini_array"),
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used)) static void (*__fini)(void) = __do_fini;
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#elif defined(__i386__) || defined(__x86_64__)
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__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
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"call " __USER_LABEL_PREFIX__ "__do_fini\n\t"
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".popsection");
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#elif defined(__arm__) || defined(__aarch64__)
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__asm__(".pushsection .fini,\"ax\",%progbits\n\t"
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"bl " __USER_LABEL_PREFIX__ "__do_fini\n\t"
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".popsection");
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#elif defined(__powerpc__) || defined(__powerpc64__)
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__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
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"bl " __USER_LABEL_PREFIX__ "__do_fini\n\t"
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"nop\n\t"
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".popsection");
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#elif defined(__riscv)
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__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
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"call " __USER_LABEL_PREFIX__ "__do_fini\n\t"
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".popsection");
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#elif defined(__sparc__)
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__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
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"call " __USER_LABEL_PREFIX__ "__do_fini\n\t"
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".popsection");
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#else
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#error "crtbegin without .init_fini array unimplemented for this architecture"
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#endif // CRT_HAS_INIT_FINI_ARRAY
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