HelenOS sources

__c_start          35 uspace/lib/c/arch/abs32le/src/crt0.c extern void __c_start(void *);
__c_start          41 uspace/lib/c/arch/abs32le/src/crt0.c 	__c_start(NULL);
__c_start          33 uspace/lib/c/arch/riscv64/src/crt0.c extern void __c_start(void *);
__c_start          39 uspace/lib/c/arch/riscv64/src/crt0.c 	__c_start(0);
__c_start          50 uspace/lib/c/generic/crt/crt1.c void __c_start(void *);
HelenOS homepage, sources at GitHub