| 0,0 → 1,99 |
|---|
| /* |
| * Copyright (c) 2007 Pavel Jancik |
| * Copyright (c) 2007 Michal Kebrt |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup libcarm32 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #ifndef LIBC_arm32_TLS_H_ |
| #define LIBC_arm32_TLS_H_ |
| |
| #include <sys/types.h> |
| |
| #define CONFIG_TLS_VARIANT_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 |
| |
| /** @} |
| */ |