From: Sascha Hauer <[email protected]> Implementation has been taken from newlib as this is much simpler than the glibc version.
Signed-off-by: Sascha Hauer <[email protected]> Signed-off-by: Ahmad Fatoum <[email protected]> --- arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/setjmp.h | 21 ++++++++ arch/powerpc/lib/Makefile | 2 +- arch/powerpc/lib/setjmp.S | 86 +++++++++++++++++++++++++++++++ 4 files changed, 109 insertions(+), 1 deletion(-) create mode 100644 arch/powerpc/include/asm/setjmp.h create mode 100644 arch/powerpc/lib/setjmp.S diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 90ec7b1702e9..376c1bf42b5e 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -6,6 +6,7 @@ config PPC select HAS_CACHE select GENERIC_FIND_NEXT_BIT select OFTREE + select HAS_ARCH_SJLJ default y choice diff --git a/arch/powerpc/include/asm/setjmp.h b/arch/powerpc/include/asm/setjmp.h new file mode 100644 index 000000000000..c558415c99d9 --- /dev/null +++ b/arch/powerpc/include/asm/setjmp.h @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH + * (C) Copyright 2016 Alexander Graf <[email protected]> + */ + +#ifndef _SETJMP_H_ +#define _SETJMP_H_ 1 + +#include <asm/types.h> + +typedef struct __jmp_buf_internal_tag { + long int __regs[24]; +} jmp_buf[1]; + +int setjmp(jmp_buf jmp) __attribute__((returns_twice)); +void longjmp(jmp_buf jmp, int ret) __attribute__((noreturn)); + +int initjmp(jmp_buf jmp, void __noreturn (*func)(void), void *stack_top); + +#endif /* _SETJMP_H_ */ diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index ba2f078b6277..405351c19929 100644 --- a/arch/powerpc/lib/Makefile +++ b/arch/powerpc/lib/Makefile @@ -9,4 +9,4 @@ obj-$(CONFIG_CMD_BOOTM) += ppclinux.o obj-$(CONFIG_MODULES) += module.o obj-y += crtsavres.o obj-y += reloc.o - +obj-y += setjmp.o diff --git a/arch/powerpc/lib/setjmp.S b/arch/powerpc/lib/setjmp.S new file mode 100644 index 000000000000..021a57eebc3c --- /dev/null +++ b/arch/powerpc/lib/setjmp.S @@ -0,0 +1,86 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* + * This is a simple version of setjmp and longjmp for the PowerPC. + * Ian Lance Taylor, Cygnus Support, 9 Feb 1994. + */ + +#include <linux/linkage.h> +#include <asm/ppc_asm.tmpl> + +ENTRY(setjmp) + addi r3,r3,7 # align to 8 byte boundary + rlwinm r3,r3,0,0,28 + stw r1,0(r3) # offset 0 + stwu r2,4(r3) # offset 4 + stwu r13,4(r3) # offset 8 + stwu r14,4(r3) # offset 12 + stwu r15,4(r3) # offset 16 + stwu r16,4(r3) # offset 20 + stwu r17,4(r3) # offset 24 + stwu r18,4(r3) # offset 28 + stwu r19,4(r3) # offset 32 + stwu r20,4(r3) # offset 36 + stwu r21,4(r3) # offset 40 + stwu r22,4(r3) # offset 44 + stwu r23,4(r3) # offset 48 + stwu r24,4(r3) # offset 52 + stwu r25,4(r3) # offset 56 + stwu r26,4(r3) # offset 60 + stwu r27,4(r3) # offset 64 + stwu r28,4(r3) # offset 68 + stwu r29,4(r3) # offset 72 + stwu r30,4(r3) # offset 76 + stwu r31,4(r3) # offset 80 + mflr r4 + stwu r4,4(r3) # offset 84 + mfcr r4 + stwu r4,4(r3) # offset 88 + + li r3,0 + blr +END(setjmp) + +ENTRY(longjmp) + addi r3,r3,7 # align to 8 byte boundary + rlwinm r3,r3,0,0,28 + lwz r1,0(r3) # offset 0 + lwzu r2,4(r3) # offset 4 + lwzu r13,4(r3) # offset 8 + lwzu r14,4(r3) # offset 12 + lwzu r15,4(r3) # offset 16 + lwzu r16,4(r3) # offset 20 + lwzu r17,4(r3) # offset 24 + lwzu r18,4(r3) # offset 28 + lwzu r19,4(r3) # offset 32 + lwzu r20,4(r3) # offset 36 + lwzu r21,4(r3) # offset 40 + lwzu r22,4(r3) # offset 44 + lwzu r23,4(r3) # offset 48 + lwzu r24,4(r3) # offset 52 + lwzu r25,4(r3) # offset 56 + lwzu r26,4(r3) # offset 60 + lwzu r27,4(r3) # offset 64 + lwzu r28,4(r3) # offset 68 + lwzu r29,4(r3) # offset 72 + lwzu r30,4(r3) # offset 76 + lwzu r31,4(r3) # offset 80 + lwzu r5,4(r3) # offset 84 + mtlr r5 + lwzu r5,4(r3) # offset 88 + mtcrf 255,r5 + + mr. r3,r4 + bclr+ 4,2 + li r3,1 + blr +END(longjmp) + +ENTRY(initjmp) + addi r3,r3,7 # align to 8 byte boundary + rlwinm r3,r3,0,0,28 + stw r5,0(r3) # offset 0 + stwu r4,88(r3) # offset 88 + li r3,0 + blr +END(initjmp) -- 2.29.2 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
