132 lines
3.6 KiB
C
132 lines
3.6 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_FRAME_H
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#define _SYS_FRAME_H
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#include <sys/types.h>
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#if defined(_LP64) || defined(_I32LPx)
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typedef long greg_t;
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#else
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typedef int greg_t;
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#endif
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struct frame {
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greg_t fr_savfp; /* saved frame pointer */
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greg_t fr_savpc; /* saved program counter */
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};
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/*
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* In the x86 world, a stack frame looks like this:
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*
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* |--------------------------|
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* 4n+8(%ebp) ->| argument word n |
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* | ... | (Previous frame)
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* 8(%ebp) ->| argument word 0 |
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* |--------------------------|--------------------
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* 4(%ebp) ->| return address |
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* |--------------------------|
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* 0(%ebp) ->| previous %ebp (optional) |
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* |--------------------------|
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* -4(%ebp) ->| unspecified | (Current frame)
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* | ... |
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* 0(%esp) ->| variable size |
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* |--------------------------|
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*/
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/*
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* Stack alignment macros.
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*/
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#define STACK_ALIGN32 4
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#define STACK_ENTRY_ALIGN32 4
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#define STACK_BIAS32 0
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#define SA32(x) (((x)+(STACK_ALIGN32-1)) & ~(STACK_ALIGN32-1))
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#define STACK_RESERVE32 0
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#define MINFRAME32 0
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#if defined(__amd64)
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/*
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* In the amd64 world, a stack frame looks like this:
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*
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* |--------------------------|
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* 8n+16(%rbp)->| argument word n |
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* | ... | (Previous frame)
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* 16(%rbp) ->| argument word 0 |
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* |--------------------------|--------------------
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* 8(%rbp) ->| return address |
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* |--------------------------|
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* 0(%rbp) ->| previous %rbp |
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* |--------------------------|
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* -8(%rbp) ->| unspecified | (Current frame)
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* | ... |
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* 0(%rsp) ->| variable size |
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* |--------------------------|
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* -128(%rsp) ->| reserved for function |
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* |--------------------------|
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*
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* The end of the input argument area must be aligned on a 16-byte
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* boundary; i.e. (%rsp - 8) % 16 == 0 at function entry.
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*
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* The 128-byte location beyond %rsp is considered to be reserved for
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* functions and is NOT modified by signal handlers. It can be used
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* to store temporary data that is not needed across function calls.
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*/
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/*
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* Stack alignment macros.
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*/
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#define STACK_ALIGN64 16
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#define STACK_ENTRY_ALIGN64 8
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#define STACK_BIAS64 0
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#define SA64(x) (((x)+(STACK_ALIGN64-1)) & ~(STACK_ALIGN64-1))
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#define STACK_RESERVE64 128
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#define MINFRAME64 0
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#define STACK_ALIGN STACK_ALIGN64
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#define STACK_ENTRY_ALIGN STACK_ENTRY_ALIGN64
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#define STACK_BIAS STACK_BIAS64
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#define SA(x) SA64(x)
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#define STACK_RESERVE STACK_RESERVE64
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#define MINFRAME MINFRAME64
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#elif defined(__i386)
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#define STACK_ALIGN STACK_ALIGN32
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#define STACK_ENTRY_ALIGN STACK_ENTRY_ALIGN32
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#define STACK_BIAS STACK_BIAS32
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#define SA(x) SA32(x)
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#define STACK_RESERVE STACK_RESERVE32
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#define MINFRAME MINFRAME32
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#endif /* __i386 */
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#endif /* _SYS_FRAME_H */
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