/* SPDX-License-Identifier: GPL-2.0+ */ | |
/* | |
* (C) 2018 Alexander Graf <agraf@suse.de> | |
*/ | |
#include <config.h> | |
#include <linux/linkage.h> | |
#ifdef CONFIG_ARCH_RV64I | |
#define STORE_IDX(reg, idx) sd reg, (idx*8)(a0) | |
#define LOAD_IDX(reg, idx) ld reg, (idx*8)(a0) | |
#else | |
#define STORE_IDX(reg, idx) sw reg, (idx*4)(a0) | |
#define LOAD_IDX(reg, idx) lw reg, (idx*4)(a0) | |
#endif | |
.pushsection .text.setjmp, "ax" | |
ENTRY(setjmp) | |
/* Preserve all callee-saved registers and the SP */ | |
STORE_IDX(s0, 0) | |
STORE_IDX(s1, 1) | |
STORE_IDX(s2, 2) | |
STORE_IDX(s3, 3) | |
STORE_IDX(s4, 4) | |
STORE_IDX(s5, 5) | |
STORE_IDX(s6, 6) | |
STORE_IDX(s7, 7) | |
STORE_IDX(s8, 8) | |
STORE_IDX(s9, 9) | |
STORE_IDX(s10, 10) | |
STORE_IDX(s11, 11) | |
STORE_IDX(ra, 12) | |
STORE_IDX(sp, 13) | |
li a0, 0 | |
ret | |
ENDPROC(setjmp) | |
.popsection | |
.pushsection .text.longjmp, "ax" | |
ENTRY(longjmp) | |
LOAD_IDX(s0, 0) | |
LOAD_IDX(s1, 1) | |
LOAD_IDX(s2, 2) | |
LOAD_IDX(s3, 3) | |
LOAD_IDX(s4, 4) | |
LOAD_IDX(s5, 5) | |
LOAD_IDX(s6, 6) | |
LOAD_IDX(s7, 7) | |
LOAD_IDX(s8, 8) | |
LOAD_IDX(s9, 9) | |
LOAD_IDX(s10, 10) | |
LOAD_IDX(s11, 11) | |
LOAD_IDX(ra, 12) | |
LOAD_IDX(sp, 13) | |
/* Move the return value in place, but return 1 if passed 0. */ | |
seqz a0, a1 | |
add a0, a0, a1 | |
ret | |
ENDPROC(longjmp) | |
.popsection |