1 /* 2 * Copyright (c) 2006-2018, RT-Thread Development Team 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 * 6 * Change Logs: 7 * Date Author Notes 8 * 2014-12-03 Bernard Add copyright header. 9 * 2014-12-29 Bernard Add cplusplus initialization for ARMCC. 10 * 2016-06-28 Bernard Add _init/_fini routines for GCC. 11 * 2016-10-02 Bernard Add WEAK for cplusplus_system_init routine. 12 */ 13 14 #include <rtthread.h> 15 16 #ifdef __CC_ARM 17 extern void $Super$$__cpp_initialize__aeabi_(void); 18 /* we need to change the cpp_initialize order */ $Sub$$__cpp_initialize__aeabi_(void)19void $Sub$$__cpp_initialize__aeabi_(void) 20 { 21 /* empty */ 22 } 23 #elif defined(__GNUC__) && !defined(__CS_SOURCERYGXX_MAJ__) 24 /* The _init()/_fini() routines has been defined in codesourcery g++ lite */ _init()25RT_WEAK void _init() 26 { 27 } 28 _fini()29RT_WEAK void _fini() 30 { 31 } 32 33 RT_WEAK void *__dso_handle = 0; 34 35 #endif 36 37 RT_WEAK cplusplus_system_init(void)38int cplusplus_system_init(void) 39 { 40 #if defined(__GNUC__) && !defined(__CC_ARM) 41 typedef void (*pfunc) (); 42 extern pfunc __ctors_start__[]; 43 extern pfunc __ctors_end__[]; 44 pfunc *p; 45 46 for (p = __ctors_start__; p < __ctors_end__; p++) 47 (*p)(); 48 49 #elif defined(__CC_ARM) 50 /* If there is no SHT$$INIT_ARRAY, calling 51 * $Super$$__cpp_initialize__aeabi_() will cause fault. At least until Keil5.12 52 * the problem still exists. So we have to initialize the C++ runtime by ourself. 53 */ 54 typedef void PROC(); 55 extern const unsigned long SHT$$INIT_ARRAY$$Base[]; 56 extern const unsigned long SHT$$INIT_ARRAY$$Limit[]; 57 58 const unsigned long *base = SHT$$INIT_ARRAY$$Base; 59 const unsigned long *lim = SHT$$INIT_ARRAY$$Limit; 60 61 for (; base != lim; base++) 62 { 63 PROC *proc = (PROC*)((const char*)base + *base); 64 (*proc)(); 65 } 66 #endif 67 68 return 0; 69 } 70 INIT_COMPONENT_EXPORT(cplusplus_system_init); 71 72