| 1 | /*
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| 2 | * Copyright (c) 2005 Ondrej Palkovsky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef KERN_amd64_CONTEXT_OFFSET_H_
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| 30 | #define KERN_amd64_CONTEXT_OFFSET_H_
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| 31 |
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| 32 | #define OFFSET_SP 0x0
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| 33 | #define OFFSET_PC 0x8
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| 34 | #define OFFSET_RBX 0x10
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| 35 | #define OFFSET_RBP 0x18
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| 36 | #define OFFSET_R12 0x20
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| 37 | #define OFFSET_R13 0x28
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| 38 | #define OFFSET_R14 0x30
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| 39 | #define OFFSET_R15 0x38
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| 40 |
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| 41 | #ifdef KERNEL
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| 42 | # define OFFSET_IPL 0x40
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| 43 | #else
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| 44 | # define OFFSET_TLS 0x40
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| 45 | #endif
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| 46 |
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| 47 | #ifdef __ASM__
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| 48 |
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| 49 | # ctx: address of the structure with saved context
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| 50 | # pc: return address
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| 51 | .macro CONTEXT_SAVE_ARCH_CORE ctx:req pc:req
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| 52 | movq \pc, OFFSET_PC(\ctx)
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| 53 | movq %rsp, OFFSET_SP(\ctx)
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| 54 |
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| 55 | movq %rbx, OFFSET_RBX(\ctx)
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| 56 | movq %rbp, OFFSET_RBP(\ctx)
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| 57 | movq %r12, OFFSET_R12(\ctx)
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| 58 | movq %r13, OFFSET_R13(\ctx)
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| 59 | movq %r14, OFFSET_R14(\ctx)
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| 60 | movq %r15, OFFSET_R15(\ctx)
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| 61 | .endm
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| 62 |
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| 63 | # ctx: address of the structure with saved context
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| 64 | .macro CONTEXT_RESTORE_ARCH_CORE ctx:req pc:req
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| 65 | movq OFFSET_R15(\ctx), %r15
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| 66 | movq OFFSET_R14(\ctx), %r14
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| 67 | movq OFFSET_R13(\ctx), %r13
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| 68 | movq OFFSET_R12(\ctx), %r12
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| 69 | movq OFFSET_RBP(\ctx), %rbp
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| 70 | movq OFFSET_RBX(\ctx), %rbx
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| 71 |
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| 72 | movq OFFSET_SP(\ctx), %rsp # ctx->sp -> %rsp
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| 73 |
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| 74 | movq OFFSET_PC(\ctx), \pc
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| 75 | .endm
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| 76 |
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| 77 | #endif
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| 78 |
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| 79 | #endif
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