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/*
* Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <asm_macros.S>
#include <assert_macros.S>
#include <setjmp.h>
.globl setjmp
.globl longjmp
/*
* int setjmp(jmp_buf env);
*/
func setjmp
mov x7, sp
stp x19, x20, [x0, #JMP_CTX_X19]
stp x21, x22, [x0, #JMP_CTX_X21]
stp x23, x24, [x0, #JMP_CTX_X23]
stp x25, x26, [x0, #JMP_CTX_X25]
stp x27, x28, [x0, #JMP_CTX_X27]
stp x29, x30, [x0, #JMP_CTX_X29]
stp x7, xzr, [x0, #JMP_CTX_SP]
mov x0, #0
ret
endfunc setjmp
/*
* void longjmp(jmp_buf env, int val);
*/
func longjmp
ldp x7, xzr, [x0, #JMP_CTX_SP]
#if ENABLE_ASSERTIONS
/*
* Since we're unwinding the stack, assert that the stack being reset to
* is shallower.
*/
mov x19, sp
cmp x7, x19
ASM_ASSERT(ge)
#endif
ldp x19, x20, [x0, #JMP_CTX_X19]
ldp x21, x22, [x0, #JMP_CTX_X21]
ldp x23, x24, [x0, #JMP_CTX_X23]
ldp x25, x26, [x0, #JMP_CTX_X25]
ldp x27, x28, [x0, #JMP_CTX_X27]
ldp x29, x30, [x0, #JMP_CTX_X29]
mov sp, x7
ands x0, x1, x1 /* Move val to x0 and set flags */
cinc x0, x0, eq /* If val is 0, return 1 */
ret
endfunc longjmp
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