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78 lines
1.8 KiB
ArmAsm
78 lines
1.8 KiB
ArmAsm
/* Copyright 2014-2016 Samsung Electronics Co., Ltd.
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* Copyright 2016 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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.macro func _name
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.global \_name
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.type \_name, %function
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\_name:
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.endm
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.macro endfunc _name
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.size \_name, .-\_name
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.endm
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/**
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* setjmp (jmp_buf env)
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*
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* See also:
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* longjmp
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*
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* @return 0 - if returns from direct call,
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* nonzero - if returns after longjmp.
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*/
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func setjmp
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mov %eax,(%eax);
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mov %ebx,0x4(%eax);
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mov %ecx,0x8(%eax);
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mov %edx,0xc(%eax);
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mov %esi,0x10(%eax);
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mov %edi,0x14(%eax);
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mov %ebp,0x18(%eax);
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mov %esp,0x1c(%eax);
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push %edx;
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mov 0x4(%esp),%edx;
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mov %edx,0x20(%eax);
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pop %edx;
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xor %eax,%eax;
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ret
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endfunc setjmp
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/**
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* longjmp (jmp_buf env, int val)
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*
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* Note:
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* if val is not 0, then it would be returned from setjmp,
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* otherwise - 0 would be returned.
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*
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* See also:
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* setjmp
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*/
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func longjmp
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test %edx, %edx;
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jne . + 0x3;
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inc %edx;
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mov 0x4(%eax),%ebx;
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mov 0x8(%eax),%ecx;
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mov 0x10(%eax),%esi;
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mov 0x14(%eax),%edi;
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mov 0x18(%eax),%ebp;
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mov 0x1c(%eax),%esp;
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push %edx;
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mov 0x20(%eax),%edx;
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mov %edx,0x4(%esp);
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mov 0xc(%eax),%edx;
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pop %eax;
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ret
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endfunc longjmp
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