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- /*
- * Copyright (C) 2011-2017 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
- #include "offsets.h"
- .global setcontext
- .type setcontext, @function
- setcontext:
- movl 4(%esp),%eax /* ucontext_t* */
- /* restore FP state */
- movl LINUX_UC_FPREGS_PTR_OFF(%eax), %ecx
- fldenv (%ecx)
- #ifdef SE_SIM
- /* restore FS */
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FS_OFF)(%eax), %ecx
- movl %ecx, %fs
- #endif
- /* new stack */
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ESP_OFF)(%eax), %esp
- /* push the return address on the stack */
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EIP_OFF)(%eax), %ecx
- pushl %ecx
- /* restore GPRs */
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EDI_OFF)(%eax), %edi
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ESI_OFF)(%eax), %esi
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EBP_OFF)(%eax), %ebp
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EBX_OFF)(%eax), %ebx
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EDX_OFF)(%eax), %edx
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ECX_OFF)(%eax), %ecx
- movl (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EAX_OFF)(%eax), %eax
- ret
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