| 1,5 → 1,6 |
|---|
| /* |
| * Copyright (c) 2007 Pavel Jancik, Michal Kebrt |
| * Copyright (c) 2007 Pavel Jancik |
| * Copyright (c) 2007 Michal Kebrt |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| 30,69 → 31,11 |
|---|
| * @{ |
| */ |
| /** @file |
| * @brief Uspace threads and TLS. |
| */ |
| |
| #ifndef LIBC_arm32_THREAD_H_ |
| #define LIBC_arm32_THREAD_H_ |
| |
| #include <unistd.h> |
| |
| /** Stack initial size. */ |
| #define THREAD_INITIAL_STACK_PAGES_NO 1 |
| |
| /** Offsets for accessing __thread variables are shifted 8 bytes higher. */ |
| #define ARM_TP_OFFSET (-8) |
| |
| /** TCB (Thread Control Block) struct. |
| * |
| * TLS starts just after this struct. |
| */ |
| typedef struct { |
| /** Fibril data. */ |
| void *fibril_data; |
| } tcb_t; |
| |
| |
| /** Sets TLS address to the r9 register. |
| * |
| * @param tcb TCB (TLS starts behind) |
| */ |
| static inline void __tcb_set(tcb_t *tcb) |
| { |
| void *tls = (void *) tcb; |
| tls += sizeof(tcb_t) + ARM_TP_OFFSET; |
| asm volatile ( |
| "mov r9, %0" |
| : |
| : "r"(tls) |
| ); |
| } |
| |
| |
| /** Returns TCB address. |
| * |
| * @return TCB address (starts before TLS which address is stored in r9 register). |
| */ |
| static inline tcb_t *__tcb_get(void) |
| { |
| void *ret; |
| asm volatile ( |
| "mov %0, r9" |
| : "=r"(ret) |
| ); |
| return (tcb_t *) (ret - ARM_TP_OFFSET - sizeof(tcb_t)); |
| } |
| |
| |
| /** Returns TLS address stored. |
| * |
| * Implemented in assembly. |
| * |
| * @return TLS address stored in r9 register |
| */ |
| extern uintptr_t __aeabi_read_tp(void); |
| |
| #endif |
| |
| /** @} |