mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
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f5478dedf9
The architecture dependant header files in include/lib/${ARCH} and
include/common/${ARCH} have been moved to /include/arch/${ARCH}.
Change-Id: I96f30fdb80b191a51448ddf11b1d4a0624c03394
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef SETJMP_H
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#define SETJMP_H
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#define JMP_CTX_X19 0x0
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#define JMP_CTX_X21 0x10
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#define JMP_CTX_X23 0x20
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#define JMP_CTX_X25 0x30
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#define JMP_CTX_X27 0x40
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#define JMP_CTX_X29 0x50
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#define JMP_CTX_SP 0x60
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#define JMP_CTX_END 0x70
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#define JMP_SIZE (JMP_CTX_END >> 3)
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#ifndef __ASSEMBLY__
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#include <stdint.h>
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/* Jump buffer hosting x18 - x30 and sp_el0 registers */
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struct jmpbuf {
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uint64_t buf[JMP_SIZE];
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} __aligned(16);
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/*
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* Set a jump point, and populate the jump buffer with context information so
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* that longjmp() can jump later. The caller must adhere to the following
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* conditions:
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*
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* - After calling this function, the stack must not be shrunk. The contents of
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* the stack must not be changed either.
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*
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* - If the caller were to 'return', the buffer must be considered invalid, and
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* must not be used with longjmp().
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*
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* The caller will observe this function returning at two distinct
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* circumstances, each with different return values:
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*
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* - Zero, when the buffer is setup;
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*
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* - Non-zero, when a call to longjmp() is made (presumably by one of the
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* callee functions) with the same jump buffer.
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*/
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int setjmp(struct jmpbuf *buf);
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/*
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* Reset execution to a jump point, and restore context information according to
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* the jump buffer populated by setjmp().
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*/
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void longjmp(struct jmpbuf *buf);
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#endif /* __ASSEMBLY__ */
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#endif /* SETJMP_H */
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