1 /* 2 * Copyright 2019-2021, Haiku, Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5 6 #include <runtime_loader/runtime_loader.h> 7 8 #include "support/TLS.h" 9 #include "tls.h" 10 11 12 struct tls_index { 13 unsigned long ti_module; 14 unsigned long ti_offset; 15 }; 16 17 extern "C" void* __tls_get_addr(struct tls_index* ti); 18 19 // TODO: use std::atomic<int> here like x86_64 20 static int32 gNextSlot = TLS_FIRST_FREE_SLOT; 21 22 23 static inline void** 24 get_tls() 25 { 26 void** tls; 27 __asm__ __volatile__ ("mv %0, tp" : "=r" (tls)); 28 return tls; 29 } 30 31 32 int32 33 tls_allocate(void) 34 { 35 if (gNextSlot < TLS_MAX_KEYS) { 36 int32 next = gNextSlot++; 37 if (next < TLS_MAX_KEYS) 38 return next; 39 } 40 41 return B_NO_MEMORY; 42 } 43 44 45 void * 46 tls_get(int32 index) 47 { 48 return get_tls()[index]; 49 } 50 51 52 void ** 53 tls_address(int32 index) 54 { 55 return get_tls() + index; 56 } 57 58 59 void 60 tls_set(int32 index, void *value) 61 { 62 get_tls()[index] = value; 63 } 64 65 66 void* 67 __tls_get_addr(struct tls_index* ti) 68 { 69 return __gRuntimeLoader->get_tls_address(ti->ti_module, ti->ti_offset); 70 } 71