RISC-V: Add setjmp implementation
This patch adds a 32/64 capable setjmp implementation for RISC-V. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Alexander Graf
Daniel Kiper
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3 changed files with 138 additions and 0 deletions
84
grub-core/lib/riscv/setjmp.S
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84
grub-core/lib/riscv/setjmp.S
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/symbol.h>
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#include <grub/dl.h>
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.file "setjmp.S"
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GRUB_MOD_LICENSE "GPLv3+"
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.text
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#if __riscv_xlen == 64
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#define STORE_IDX(reg, idx) sd reg, (idx*8)(a0)
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#define LOAD_IDX(reg, idx) ld reg, (idx*8)(a0)
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#else
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#define STORE_IDX(reg, idx) sw reg, (idx*4)(a0)
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#define LOAD_IDX(reg, idx) lw reg, (idx*4)(a0)
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#endif
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/*
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* int grub_setjmp (grub_jmp_buf env)
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*/
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FUNCTION(grub_setjmp)
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/* Preserve all callee-saved registers and the SP */
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STORE_IDX(s0, 0)
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STORE_IDX(s1, 1)
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STORE_IDX(s2, 2)
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STORE_IDX(s3, 3)
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STORE_IDX(s4, 4)
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STORE_IDX(s5, 5)
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STORE_IDX(s6, 6)
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STORE_IDX(s7, 7)
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STORE_IDX(s8, 8)
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STORE_IDX(s9, 9)
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STORE_IDX(s10, 10)
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STORE_IDX(s11, 11)
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STORE_IDX(ra, 12)
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STORE_IDX(sp, 13)
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li a0, 0
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ret
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/*
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* int grub_longjmp (grub_jmp_buf env, int val)
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*/
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FUNCTION(grub_longjmp)
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LOAD_IDX(s0, 0)
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LOAD_IDX(s1, 1)
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LOAD_IDX(s2, 2)
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LOAD_IDX(s3, 3)
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LOAD_IDX(s4, 4)
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LOAD_IDX(s5, 5)
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LOAD_IDX(s6, 6)
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LOAD_IDX(s7, 7)
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LOAD_IDX(s8, 8)
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LOAD_IDX(s9, 9)
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LOAD_IDX(s10, 10)
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LOAD_IDX(s11, 11)
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LOAD_IDX(ra, 12)
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LOAD_IDX(sp, 13)
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/* Move the return value in place, but return 1 if passed 0. */
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beq a1, zero, longjmp_1
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mv a0, a1
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ret
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longjmp_1:
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li a0, 1
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ret
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27
include/grub/riscv32/setjmp.h
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27
include/grub/riscv32/setjmp.h
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_SETJMP_CPU_HEADER
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#define GRUB_SETJMP_CPU_HEADER 1
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typedef unsigned long long grub_jmp_buf[14];
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int grub_setjmp (grub_jmp_buf env) RETURNS_TWICE;
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void grub_longjmp (grub_jmp_buf env, int val) __attribute__ ((noreturn));
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#endif /* ! GRUB_SETJMP_CPU_HEADER */
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27
include/grub/riscv64/setjmp.h
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27
include/grub/riscv64/setjmp.h
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_SETJMP_CPU_HEADER
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#define GRUB_SETJMP_CPU_HEADER 1
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typedef unsigned long long grub_jmp_buf[14];
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int grub_setjmp (grub_jmp_buf env) RETURNS_TWICE;
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void grub_longjmp (grub_jmp_buf env, int val) __attribute__ ((noreturn));
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#endif /* ! GRUB_SETJMP_CPU_HEADER */
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