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u-boot/arch/arm/include/asm/setjmp.h

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-06 21:58:06 +00:00
/* SPDX-License-Identifier: GPL-2.0+ */
arm: Introduce setjmp/longjmp To quit an EFI application we will need logic to jump to the caller of a function without returning from the function we called into, so we need setjmp/longjmp functionality. This patch introduces a trivial implementation of these that I verified works on armv7, thumb2 and aarch64. Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-20 21:28:22 +00:00
/*
arm: provide a PCS-compliant setjmp implementation 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>
2017-10-10 14:21:13 +00:00
* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
* (C) Copyright 2016 Alexander Graf <agraf@suse.de>
arm: Introduce setjmp/longjmp To quit an EFI application we will need logic to jump to the caller of a function without returning from the function we called into, so we need setjmp/longjmp functionality. This patch introduces a trivial implementation of these that I verified works on armv7, thumb2 and aarch64. Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-20 21:28:22 +00:00
*/
#ifndef _SETJMP_H_
#define _SETJMP_H_ 1
arm: provide a PCS-compliant setjmp implementation 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>
2017-10-10 14:21:13 +00:00
/*
* This really should be opaque, but the EFI implementation wrongly
* assumes that a 'struct jmp_buf_data' is defined.
*/
arm: Introduce setjmp/longjmp To quit an EFI application we will need logic to jump to the caller of a function without returning from the function we called into, so we need setjmp/longjmp functionality. This patch introduces a trivial implementation of these that I verified works on armv7, thumb2 and aarch64. Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-20 21:28:22 +00:00
struct jmp_buf_data {
arm: provide a PCS-compliant setjmp implementation 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>
2017-10-10 14:21:13 +00:00
#if defined(__aarch64__)
u64 regs[13];
arm: Introduce setjmp/longjmp To quit an EFI application we will need logic to jump to the caller of a function without returning from the function we called into, so we need setjmp/longjmp functionality. This patch introduces a trivial implementation of these that I verified works on armv7, thumb2 and aarch64. Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-20 21:28:22 +00:00
#else
arm: provide a PCS-compliant setjmp implementation 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>
2017-10-10 14:21:13 +00:00
u32 regs[10]; /* r4-r9, sl, fp, sp, lr */
arm: Introduce setjmp/longjmp To quit an EFI application we will need logic to jump to the caller of a function without returning from the function we called into, so we need setjmp/longjmp functionality. This patch introduces a trivial implementation of these that I verified works on armv7, thumb2 and aarch64. Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-20 21:28:22 +00:00
#endif
arm: provide a PCS-compliant setjmp implementation 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>
2017-10-10 14:21:13 +00:00
};
arm: Introduce setjmp/longjmp To quit an EFI application we will need logic to jump to the caller of a function without returning from the function we called into, so we need setjmp/longjmp functionality. This patch introduces a trivial implementation of these that I verified works on armv7, thumb2 and aarch64. Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-20 21:28:22 +00:00
arm: provide a PCS-compliant setjmp implementation 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>
2017-10-10 14:21:13 +00:00
typedef struct jmp_buf_data jmp_buf[1];
arm: Introduce setjmp/longjmp To quit an EFI application we will need logic to jump to the caller of a function without returning from the function we called into, so we need setjmp/longjmp functionality. This patch introduces a trivial implementation of these that I verified works on armv7, thumb2 and aarch64. Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-20 21:28:22 +00:00
arm: provide a PCS-compliant setjmp implementation 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>
2017-10-10 14:21:13 +00:00
int setjmp(jmp_buf jmp);
void longjmp(jmp_buf jmp, int ret);
arm: Introduce setjmp/longjmp To quit an EFI application we will need logic to jump to the caller of a function without returning from the function we called into, so we need setjmp/longjmp functionality. This patch introduces a trivial implementation of these that I verified works on armv7, thumb2 and aarch64. Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-20 21:28:22 +00:00
#endif /* _SETJMP_H_ */
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