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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2018 Free Software Foundation, Inc.
*
* GRUB 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.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/symbol.h>
#include <grub/dl.h>
.file "setjmp.S"
GRUB_MOD_LICENSE "GPLv3+"
.text
#if __riscv_xlen == 64
#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
/*
* int grub_setjmp (grub_jmp_buf env)
*/
FUNCTION(grub_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
/*
* int grub_longjmp (grub_jmp_buf env, int val)
*/
FUNCTION(grub_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. */
beq a1, zero, longjmp_1
mv a0, a1
ret
longjmp_1:
li a0, 1
ret
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