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f0669ebd59
arch_setjmp.S stores d8-d15 only under CONFIG_ARCH_FPU, but it did not include nuttx/config.h. So setjmp() never saved these registers and longjmp() never restored them. They are callee-saved (AAPCS64), so a function that kept a value in one of them could see it change after a longjmp(). Include nuttx/config.h. The assembly then stores d8-d15, eight bytes each, at offsets 112 to 176. struct setjmp_buf_s declared them as eight 4-byte floats, 32 bytes short, so declare them as uint64_t too. jmp_buf is now 176 bytes with the FPU, and its layout matches the assembly. Assisted-by: Claude Code:claude-opus-5-5 Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>
94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
/****************************************************************************
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* arch/arm64/include/setjmp.h
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM64_INCLUDE_SETJUMP_H
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#define __ARCH_ARM64_INCLUDE_SETJUMP_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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#include <sys/types.h>
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct setjmp_buf_s
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{
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uint64_t x19;
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uint64_t x20;
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uint64_t x21;
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uint64_t x22;
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uint64_t x23;
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uint64_t x24;
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uint64_t x25;
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uint64_t x26;
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uint64_t x27;
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uint64_t x28;
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uint64_t x29;
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uint64_t x30;
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uint64_t x16;
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uint64_t gap;
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#ifdef CONFIG_ARCH_FPU
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/* The low 64 bits of v8-v15, the callee-saved FP registers */
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uint64_t d8;
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uint64_t d9;
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uint64_t d10;
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uint64_t d11;
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uint64_t d12;
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uint64_t d13;
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uint64_t d14;
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uint64_t d15;
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#endif
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};
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/* Traditional typedef for setjmp_buf */
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typedef struct setjmp_buf_s jmp_buf[1];
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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int setjmp(jmp_buf env);
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void longjmp(jmp_buf env, int val) noreturn_function;
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ARCH_ARM64_INCLUDE_SETJUMP_H */
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