From 8fa8bb6f7639d11a934ca3097a811e0faf538c01 Mon Sep 17 00:00:00 2001 From: "W. J. van der Laan" Date: Fri, 23 Apr 2021 17:20:01 +0000 Subject: [PATCH] lib: Base riscv64-mes-mescc support. * lib/riscv64-mes-mescc/setjmp.c: New file. (setjmp, longjmp): Implement for RV64. --- lib/riscv64-mes-mescc/setjmp.c | 47 ++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 lib/riscv64-mes-mescc/setjmp.c diff --git a/lib/riscv64-mes-mescc/setjmp.c b/lib/riscv64-mes-mescc/setjmp.c new file mode 100644 index 00000000..4e3a4f9d --- /dev/null +++ b/lib/riscv64-mes-mescc/setjmp.c @@ -0,0 +1,47 @@ +/* -*-comment-start: "//";comment-end:""-*- + * GNU Mes --- Maxwell Equations of Software + * Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen + * Copyright © 2021 W. J. van der Laan + * + * This file is part of GNU Mes. + * + * GNU Mes is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or (at + * your option) any later version. + * + * GNU Mes is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Mes. If not, see . + */ + +#include +#include + +void +longjmp (jmp_buf env, int val) +{ + val = val == 0 ? 1 : val; + asm ("ld_____%fp,0x10(%fp)"); // env* + + asm ("ld_____%t0,0x8(%fp)"); // env.__pc + asm ("ld_____%sp,0x10(%fp)"); // env.__sp + asm ("ld_____%fp,0x0(%fp)"); // env.__bp + asm ("jr_____%t0"); + // not reached + exit (42); +} + +int +setjmp (__jmp_buf * env) +{ + long *p = (long *) &env; + env[0].__bp = p[-2]; + env[0].__pc = p[-1]; + env[0].__sp = (long) &env; + return 0; +}