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67 lines
2.5 KiB
ArmAsm
67 lines
2.5 KiB
ArmAsm
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/*
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* Copyright (C) 2011-2016 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "offsets.h"
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.global setcontext
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.type setcontext, @function
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setcontext:
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movl 4(%esp),%eax /* ucontext_t* */
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/* restore FP state */
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movl LINUX_UC_FPREGS_PTR_OFF(%eax), %ecx
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fldenv (%ecx)
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#ifdef SE_SIM
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/* restore FS */
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FS_OFF)(%eax), %ecx
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movl %ecx, %fs
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#endif
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/* new stack */
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ESP_OFF)(%eax), %esp
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/* push the return address on the stack */
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EIP_OFF)(%eax), %ecx
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pushl %ecx
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/* restore GPRs */
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EDI_OFF)(%eax), %edi
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ESI_OFF)(%eax), %esi
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EBP_OFF)(%eax), %ebp
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EBX_OFF)(%eax), %ebx
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EDX_OFF)(%eax), %edx
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ECX_OFF)(%eax), %ecx
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movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EAX_OFF)(%eax), %eax
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ret
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