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62 lines
1.8 KiB
62 lines
1.8 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <crt_priv.h>
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static void callVectors(const void *from_addr, const void *to_addr)
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{
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typedef void (* const callVect)(void);
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callVect *start = (callVect *)from_addr;
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callVect *end = (callVect *)to_addr;
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const int32_t step = from_addr < to_addr ? 1 : -1;
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const int32_t count = step > 0 ? end - start : start - end;
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// basic sanity check
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if (&start[step * count] != end)
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return;
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for (; start != end; start += step) {
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callVect vec = *start;
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if (vec != NULL)
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vec();
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}
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}
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void __crt_init(void)
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{
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extern uint32_t __init_array_start[];
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extern uint32_t __init_array_end[];
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callVectors(__init_array_start, __init_array_end);
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}
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void __crt_exit(void)
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{
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extern uint32_t __fini_array_start[];
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extern uint32_t __fini_array_end[];
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extern uint32_t __bss_end[];
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extern uint32_t __got_start[];
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// call global destructors
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callVectors(__fini_array_start, __fini_array_end);
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if (&__fini_array_end[1] <= __got_start) {
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// call registered static destructors
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callVectors(__bss_end + __fini_array_end[0] * (sizeof(uint32_t)), __bss_end);
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}
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}
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