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https://github.com/brain-hackers/u-boot-brain
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b4806d6f1f
The previous setjmp-implementation (as a static inline function that contained an 'asm volatile' sequence) was extremely fragile: (some versions of) GCC optimised the set of registers. One critical example was the removal of 'r9' from the clobber list, if -ffixed-reg9 was supplied. To increase robustness and ensure PCS-compliant behaviour, the setjmp and longjmp implementation are now in assembly and closely match what one would expect to find in a libc implementation. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Tested-by: Andy Yan <andy.yan@rock-chips.com>
29 lines
588 B
C
29 lines
588 B
C
/*
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* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
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* (C) Copyright 2016 Alexander Graf <agraf@suse.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _SETJMP_H_
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#define _SETJMP_H_ 1
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/*
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* This really should be opaque, but the EFI implementation wrongly
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* assumes that a 'struct jmp_buf_data' is defined.
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*/
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struct jmp_buf_data {
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#if defined(__aarch64__)
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u64 regs[13];
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#else
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u32 regs[10]; /* r4-r9, sl, fp, sp, lr */
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#endif
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};
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typedef struct jmp_buf_data jmp_buf[1];
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int setjmp(jmp_buf jmp);
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void longjmp(jmp_buf jmp, int ret);
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#endif /* _SETJMP_H_ */
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