Signed-off-by: Jules Maselbas <jmaselbas@xxxxxxxxx> --- changes v1 -> v2: nothing --- arch/kvx/Kconfig | 1 + arch/kvx/include/asm/setjmp.h | 15 +++++++ arch/kvx/lib/Makefile | 2 +- arch/kvx/lib/setjmp.S | 85 +++++++++++++++++++++++++++++++++++ 4 files changed, 102 insertions(+), 1 deletion(-) create mode 100644 arch/kvx/include/asm/setjmp.h create mode 100644 arch/kvx/lib/setjmp.S diff --git a/arch/kvx/Kconfig b/arch/kvx/Kconfig index 3327021e1..8483ae6e6 100644 --- a/arch/kvx/Kconfig +++ b/arch/kvx/Kconfig @@ -11,6 +11,7 @@ config KVX select ELF select FLEXIBLE_BOOTARGS select GENERIC_FIND_NEXT_BIT + select HAS_ARCH_SJLJ select LIBFDT select MFD_SYSCON select OF_BAREBOX_DRIVERS diff --git a/arch/kvx/include/asm/setjmp.h b/arch/kvx/include/asm/setjmp.h new file mode 100644 index 000000000..3cfc698d9 --- /dev/null +++ b/arch/kvx/include/asm/setjmp.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* SPDX-FileCopyrightText: 2021 Jules Maselbas <jmaselbas@xxxxxxxxx>, Kalray Inc. */ + +#ifndef _ASM_KVX_SETJMP_H_ +#define _ASM_KVX_SETJMP_H_ + +#include <linux/types.h> + +typedef u64 jmp_buf[22]; + +int initjmp(jmp_buf jmp, void __noreturn (*func)(void), void *stack_top); +int setjmp(jmp_buf jmp) __attribute__((returns_twice)); +void longjmp(jmp_buf jmp, int ret) __attribute__((noreturn)); + +#endif /* _ASM_KVX_SETJMP_H_ */ diff --git a/arch/kvx/lib/Makefile b/arch/kvx/lib/Makefile index 6e56462da..cee08b0fa 100644 --- a/arch/kvx/lib/Makefile +++ b/arch/kvx/lib/Makefile @@ -3,4 +3,4 @@ # Copyright (C) 2019 Kalray Inc. # -obj-y += cpuinfo.o board.o dtb.o poweroff.o bootm.o +obj-y += cpuinfo.o board.o dtb.o poweroff.o bootm.o setjmp.o diff --git a/arch/kvx/lib/setjmp.S b/arch/kvx/lib/setjmp.S new file mode 100644 index 000000000..829299711 --- /dev/null +++ b/arch/kvx/lib/setjmp.S @@ -0,0 +1,85 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ +/* SPDX-FileCopyrightText: 2021 Jules Maselbas <jmaselbas@xxxxxxxxx>, Kalray Inc. */ + +#define REG_SIZE 8 + +#include <linux/linkage.h> + +/* jmp_buf layout: + * [0] = $ra, $sp, $cs, $r14, + * [4] = $r20, $r21, $r22, $r23, + * [8] = $r24, $r25, $r26, $r27, + * [12] = $r28, $r29, $r30, $r31, + * [16] = $r18, $r19, + * [18] = $lc, $le, $ls, xxxx + */ + +/** + * int initjmp(jmp_buf jmp, void __noreturn (*func)(void), void *stack_top); + */ +ENTRY(initjmp) + /* store $ra */ + sd (0 * REG_SIZE)[$r0] = $r1 + ;; + /* store $sp */ + sd (1 * REG_SIZE)[$r0] = $r2 + make $r0 = 0 + ret + ;; +ENDPROC(initjmp) + +/** + * int setjmp(jmp_buf jmp); + */ +ENTRY(setjmp) + sq (16 * REG_SIZE)[$r0] = $r18r19 + get $r40 = $ra + copyd $r41 = $sp + ;; + so (4 * REG_SIZE)[$r0] = $r20r21r22r23 + get $r42 = $cs + copyd $r43 = $r14 + ;; + so (0 * REG_SIZE)[$r0] = $r40r41r42r43 + get $r40 = $lc + ;; + so (8 * REG_SIZE)[$r0] = $r24r25r26r27 + get $r41 = $le + ;; + so (12 * REG_SIZE)[$r0] = $r28r29r30r31 + get $r42 = $ls + ;; + so (18 * REG_SIZE)[$r0] = $r40r41r42r43 + make $r0 = 0 + ret + ;; +ENDPROC(setjmp) + +/** + * void longjmp(jmp_buf jmp, int ret); + */ +ENTRY(longjmp) + lo $r40r41r42r43 = (0 * REG_SIZE)[$r0] + ;; + lo $r44r45r46r47 = (18 * REG_SIZE)[$r0] + set $ra = $r40 + copyd $sp = $r41 + ;; + lo $r20r21r22r23 = (4 * REG_SIZE)[$r0] + set $cs = $r42 + copyd $r14 = $r43 + ;; + lo $r24r25r26r27 = (8 * REG_SIZE)[$r0] + set $lc = $r44 + ;; + lo $r28r29r30r31 = (12 * REG_SIZE)[$r0] + set $le = $r45 + ;; + lq $r18r19 = (16 * REG_SIZE)[$r0] + set $ls = $r46 + ;; + /* According to man, if retval is equal to 0, then we should return 1 */ + maxud $r0 = $r1, 1 + ret + ;; +ENDPROC(longjmp) -- 2.17.1 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
