projects / mirror_zfs.git / blame
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1 | /* |
| 2 | * CDDL HEADER START | |
| 3 | * | |
| 4 | * The contents of this file are subject to the terms of the | |
| 5 | * Common Development and Distribution License, Version 1.0 only | |
| 6 | * (the "License"). You may not use this file except in compliance | |
| 7 | * with the License. | |
| 8 | * | |
| 9 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 10 | * or http://www.opensolaris.org/os/licensing. | |
| 11 | * See the License for the specific language governing permissions | |
| 12 | * and limitations under the License. | |
| 13 | * | |
| 14 | * When distributing Covered Code, include this CDDL HEADER in each | |
| 15 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 16 | * If applicable, add the following below this CDDL HEADER, with the | |
| 17 | * fields enclosed by brackets "[]" replaced with your own identifying | |
| 18 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 19 | * | |
| 20 | * CDDL HEADER END | |
| 21 | */ | |
| 22 | /* | |
| 23 | * Copyright 2004 Sun Microsystems, Inc. All rights reserved. | |
| 24 | * Use is subject to license terms. | |
| 25 | */ | |
| 26 | ||
| 27 | #ifndef _SYS_FRAME_H | |
| d1d7e268 | 28 | #define _SYS_FRAME_H |
| a26baf28 BB |
29 | |
| 30 | #include <sys/types.h> | |
| 31 | ||
| 32 | #if defined(_LP64) || defined(_I32LPx) | |
| 33 | typedef long greg_t; | |
| 34 | #else | |
| 35 | typedef int greg_t; | |
| 36 | #endif | |
| 37 | ||
| 38 | struct frame { | |
| 39 | greg_t fr_savfp; /* saved frame pointer */ | |
| 40 | greg_t fr_savpc; /* saved program counter */ | |
| 41 | }; | |
| 42 | ||
| 43 | ||
| 44 | /* | |
| 45 | * In the x86 world, a stack frame looks like this: | |
| 46 | * | |
| 47 | * |--------------------------| | |
| 48 | * 4n+8(%ebp) ->| argument word n | | |
| 49 | * | ... | (Previous frame) | |
| 50 | * 8(%ebp) ->| argument word 0 | | |
| 51 | * |--------------------------|-------------------- | |
| 52 | * 4(%ebp) ->| return address | | |
| 53 | * |--------------------------| | |
| 54 | * 0(%ebp) ->| previous %ebp (optional) | | |
| 55 | * |--------------------------| | |
| 56 | * -4(%ebp) ->| unspecified | (Current frame) | |
| 57 | * | ... | | |
| 58 | * 0(%esp) ->| variable size | | |
| 59 | * |--------------------------| | |
| 60 | */ | |
| 61 | ||
| 62 | /* | |
| 63 | * Stack alignment macros. | |
| 64 | */ | |
| 65 | ||
| 66 | #define STACK_ALIGN32 4 | |
| 67 | #define STACK_ENTRY_ALIGN32 4 | |
| 68 | #define STACK_BIAS32 0 | |
| 69 | #define SA32(x) (((x)+(STACK_ALIGN32-1)) & ~(STACK_ALIGN32-1)) | |
| 70 | #define STACK_RESERVE32 0 | |
| 71 | #define MINFRAME32 0 | |
| 72 | ||
| 73 | #if defined(__amd64) | |
| 74 | ||
| 75 | /* | |
| 76 | * In the amd64 world, a stack frame looks like this: | |
| 77 | * | |
| 78 | * |--------------------------| | |
| 79 | * 8n+16(%rbp)->| argument word n | | |
| 80 | * | ... | (Previous frame) | |
| 81 | * 16(%rbp) ->| argument word 0 | | |
| 82 | * |--------------------------|-------------------- | |
| 83 | * 8(%rbp) ->| return address | | |
| 84 | * |--------------------------| | |
| 85 | * 0(%rbp) ->| previous %rbp | | |
| 86 | * |--------------------------| | |
| 87 | * -8(%rbp) ->| unspecified | (Current frame) | |
| 88 | * | ... | | |
| 89 | * 0(%rsp) ->| variable size | | |
| 90 | * |--------------------------| | |
| 91 | * -128(%rsp) ->| reserved for function | | |
| 92 | * |--------------------------| | |
| 93 | * | |
| 94 | * The end of the input argument area must be aligned on a 16-byte | |
| 95 | * boundary; i.e. (%rsp - 8) % 16 == 0 at function entry. | |
| 96 | * | |
| 97 | * The 128-byte location beyond %rsp is considered to be reserved for | |
| 98 | * functions and is NOT modified by signal handlers. It can be used | |
| 99 | * to store temporary data that is not needed across function calls. | |
| 100 | */ | |
| 101 | ||
| 102 | /* | |
| 103 | * Stack alignment macros. | |
| 104 | */ | |
| 105 | ||
| 106 | #define STACK_ALIGN64 16 | |
| 107 | #define STACK_ENTRY_ALIGN64 8 | |
| 108 | #define STACK_BIAS64 0 | |
| 109 | #define SA64(x) (((x)+(STACK_ALIGN64-1)) & ~(STACK_ALIGN64-1)) | |
| 110 | #define STACK_RESERVE64 128 | |
| 111 | #define MINFRAME64 0 | |
| 112 | ||
| 113 | #define STACK_ALIGN STACK_ALIGN64 | |
| 114 | #define STACK_ENTRY_ALIGN STACK_ENTRY_ALIGN64 | |
| 115 | #define STACK_BIAS STACK_BIAS64 | |
| 116 | #define SA(x) SA64(x) | |
| 117 | #define STACK_RESERVE STACK_RESERVE64 | |
| 118 | #define MINFRAME MINFRAME64 | |
| 119 | ||
| 120 | #elif defined(__i386) | |
| 121 | ||
| 122 | #define STACK_ALIGN STACK_ALIGN32 | |
| 123 | #define STACK_ENTRY_ALIGN STACK_ENTRY_ALIGN32 | |
| 124 | #define STACK_BIAS STACK_BIAS32 | |
| 125 | #define SA(x) SA32(x) | |
| 126 | #define STACK_RESERVE STACK_RESERVE32 | |
| 127 | #define MINFRAME MINFRAME32 | |
| 128 | ||
| 129 | #endif /* __i386 */ | |
| 130 | ||
| 131 | #endif /* _SYS_FRAME_H */ |