mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-31 03:58:17 +00:00
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
/*
|
|
* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
|
|
* (C) Copyright 2016 Alexander Graf <agraf@suse.de>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _SETJMP_H_
|
|
#define _SETJMP_H_ 1
|
|
|
|
/*
|
|
* This really should be opaque, but the EFI implementation wrongly
|
|
* assumes that a 'struct jmp_buf_data' is defined.
|
|
*/
|
|
struct jmp_buf_data {
|
|
#if defined(__aarch64__)
|
|
u64 regs[13];
|
|
#else
|
|
u32 regs[10]; /* r4-r9, sl, fp, sp, lr */
|
|
#endif
|
|
};
|
|
|
|
typedef struct jmp_buf_data jmp_buf[1];
|
|
|
|
int setjmp(jmp_buf jmp);
|
|
void longjmp(jmp_buf jmp, int ret);
|
|
|
|
#endif /* _SETJMP_H_ */
|