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- /*
- * Copyright (C) 2011-2018 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.
- *
- */
- .file "xsave_gnu.S"
- #include "linux/linux-regs.h"
- .macro DO_XSAVEC
- #if defined(LINUX64)
- .byte 0x48, 0x0f, 0xc7, 0x21
- #else
- .byte 0x0f, 0xc7, 0x21
- #endif
- .endm
- .macro DO_XRSTOR
- #if defined(LINUX64)
- .byte 0x48, 0x0f, 0xae, 0x29
- #else
- .byte 0x0f, 0xae, 0x29
- #endif
- .endm
- .macro DO_FXSAVE
- #if defined(LINUX64)
- .byte 0x48, 0x0f, 0xae, 0x01
- #else
- .byte 0x0f, 0xae, 0x01
- #endif
- .endm
- .macro DO_FXRSTOR
- #if defined(LINUX64)
- .byte 0x48, 0x0f, 0xae, 0x09
- #else
- .byte 0x0f, 0xae, 0x09
- #endif
- .endm
- .macro SET_XSAVE_MASK
- #ifdef SE_SIM
- #if defined(LINUX32)
- lea g_xsave_mask_low, %eax
- lea g_xsave_mask_high, %edx
- #else
- mov g_xsave_mask_low@GOTPCREL(%rip), %rax
- mov g_xsave_mask_high@GOTPCREL(%rip), %rdx
- #endif
- movl (%xax), %eax
- movl (%xdx), %edx
- #else
- xor %xax, %xax
- xor %xdx, %xdx
- mov $0xFFFFFFFF, %eax
- mov $0xFFFFFFFF, %edx
- #endif
- .endm
- .section .nipx,"ax",@progbits
- DECLARE_LOCAL_FUNC restore_xregs
- #if defined(LINUX32)
- mov SE_WORDSIZE(%esp), %ecx
- lea g_xsave_enabled, %eax
- #else
- mov %rdi, %rcx
- mov g_xsave_enabled@GOTPCREL(%rip), %rax
- #endif
- movl (%xax), %eax
- cmpl $0, %eax
- jz 1f
- SET_XSAVE_MASK
- DO_XRSTOR
- jmp 2f
- 1:
- DO_FXRSTOR
- 2:
- ret
- DECLARE_LOCAL_FUNC save_xregs
- #if defined(LINUX32)
- mov SE_WORDSIZE(%esp), %ecx
- lea g_xsave_enabled, %eax
- #else
- mov %rdi, %rcx
- mov g_xsave_enabled@GOTPCREL(%rip), %rax
- #endif
- fwait
- movl (%xax), %eax
- cmpl $0, %eax
- jz 1f
- SET_XSAVE_MASK
- DO_XSAVEC
- jmp 2f
- 1:
- DO_FXSAVE
- 2:
- ret
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