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https://github.com/zephyrproject-rtos/zephyr
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68b3b6135e
We really should have more faith in the compiler, it generates code to implement this exactly like the arch-specific assembly versions, and on ARM is actually 4 bytes shorter. FUNC_NO_FP used to disable the usual C preamble to update the frame/stack pointers, which is how the sizes are still the same or less. It's debatable how useful the occasional use of FUNC_NO_FP is in practice since it hinders debugging and in a production build frame pointers should be globally disabled, but we can address that later. Change-Id: I6c4b64ab3e3a9b6f91d52fa8c92e6e79a986fc77 Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* nano_offsets.h - nanokernel structure member offset definitions */
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/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <device.h>
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#ifndef _NANO_OFFSETS__H_
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#define _NANO_OFFSETS__H_
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/*
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* The final link step uses the symbol _OffsetAbsSyms to force the linkage of
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* offsets.o into the ELF image.
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*/
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GEN_ABS_SYM_BEGIN(_OffsetAbsSyms)
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/* arch-agnostic tNANO structure member offsets */
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GEN_OFFSET_SYM(tNANO, fiber);
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GEN_OFFSET_SYM(tNANO, task);
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GEN_OFFSET_SYM(tNANO, current);
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#if defined(CONFIG_THREAD_MONITOR)
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GEN_OFFSET_SYM(tNANO, threads);
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#endif
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#ifdef CONFIG_FP_SHARING
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GEN_OFFSET_SYM(tNANO, current_fp);
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#endif
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/* size of the entire tNANO structure */
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GEN_ABSOLUTE_SYM(__tNANO_SIZEOF, sizeof(tNANO));
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/* arch-agnostic struct tcs structure member offsets */
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GEN_OFFSET_SYM(tTCS, link);
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GEN_OFFSET_SYM(tTCS, prio);
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GEN_OFFSET_SYM(tTCS, flags);
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GEN_OFFSET_SYM(tTCS, coopReg); /* start of coop register set */
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GEN_OFFSET_SYM(tTCS, preempReg); /* start of prempt register set */
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#if defined(CONFIG_THREAD_MONITOR)
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GEN_OFFSET_SYM(tTCS, next_thread);
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#endif
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/* size of the entire struct tcs structure */
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GEN_ABSOLUTE_SYM(__tTCS_SIZEOF, sizeof(tTCS));
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/* size of the device structure. Used by linker scripts */
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GEN_ABSOLUTE_SYM(__DEVICE_STR_SIZEOF, sizeof(struct device));
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#endif /* _NANO_OFFSETS__H_ */
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