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liwenxiang1
64 lines
1.9 KiB
ArmAsm
64 lines
1.9 KiB
ArmAsm
/****************************************************************************
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* libs/libc/machine/x86_64/gnu/mcount.S
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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.globl mcount
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.type mcount, @function
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mcount:
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/* Allocate space for 7 registers */
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subq $56, %rsp
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movq %rax, (%rsp)
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movq %rcx, 8(%rsp)
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movq %rdx, 16(%rsp)
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movq %rsi, 24(%rsp)
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movq %rdi, 32(%rsp)
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movq %r8, 40(%rsp)
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movq %r9, 48(%rsp)
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movq 56(%rsp),%rsi
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/* Get frompc via the fp */
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movq 8(%rbp), %rdi
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/* Jump to mcount_internal */
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call mcount_internal
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/* Pop the saved registers. Please note that `mcount' has no
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return value.
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*/
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movq 48(%rsp),%r9
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movq 40(%rsp),%r8
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movq 32(%rsp),%rdi
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movq 24(%rsp),%rsi
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movq 16(%rsp),%rdx
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movq 8(%rsp), %rcx
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movq (%rsp), %rax
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addq $56, %rsp
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ret
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