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 12struct tls_index { 13 unsigned long ti_module; 14 unsigned long ti_offset; 15}; 16 17extern "C" void* __tls_get_addr(struct tls_index* ti); 18 19// TODO: use std::atomic<int> here like x86_64 20static int32 gNextSlot = TLS_FIRST_FREE_SLOT; 21 22 23static inline void** 24get_tls() 25{ 26 void** tls; 27 __asm__ __volatile__ ("mv %0, tp" : "=r" (tls)); 28 return tls; 29} 30 31 32int32 33tls_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 45void * 46tls_get(int32 index) 47{ 48 return get_tls()[index]; 49} 50 51 52void ** 53tls_address(int32 index) 54{ 55 return get_tls() + index; 56} 57 58 59void 60tls_set(int32 index, void *value) 61{ 62 get_tls()[index] = value; 63} 64 65 66void* 67__tls_get_addr(struct tls_index* ti) 68{ 69 return __gRuntimeLoader->get_tls_address(ti->ti_module, ti->ti_offset); 70} 71