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