diff options
Diffstat (limited to 'lib/libspl/include/sys/frame.h')
| -rw-r--r-- | lib/libspl/include/sys/frame.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/lib/libspl/include/sys/frame.h b/lib/libspl/include/sys/frame.h new file mode 100644 index 000000000..f936ab825 --- /dev/null +++ b/lib/libspl/include/sys/frame.h @@ -0,0 +1,131 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2004 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _SYS_FRAME_H +#define _SYS_FRAME_H + +#include <sys/types.h> + +#if defined(_LP64) || defined(_I32LPx) +typedef long greg_t; +#else +typedef int greg_t; +#endif + +struct frame { + greg_t fr_savfp; /* saved frame pointer */ + greg_t fr_savpc; /* saved program counter */ +}; + + +/* + * In the x86 world, a stack frame looks like this: + * + * |--------------------------| + * 4n+8(%ebp) ->| argument word n | + * | ... | (Previous frame) + * 8(%ebp) ->| argument word 0 | + * |--------------------------|-------------------- + * 4(%ebp) ->| return address | + * |--------------------------| + * 0(%ebp) ->| previous %ebp (optional) | + * |--------------------------| + * -4(%ebp) ->| unspecified | (Current frame) + * | ... | + * 0(%esp) ->| variable size | + * |--------------------------| + */ + +/* + * Stack alignment macros. + */ + +#define STACK_ALIGN32 4 +#define STACK_ENTRY_ALIGN32 4 +#define STACK_BIAS32 0 +#define SA32(x) (((x)+(STACK_ALIGN32-1)) & ~(STACK_ALIGN32-1)) +#define STACK_RESERVE32 0 +#define MINFRAME32 0 + +#if defined(__amd64) + +/* + * In the amd64 world, a stack frame looks like this: + * + * |--------------------------| + * 8n+16(%rbp)->| argument word n | + * | ... | (Previous frame) + * 16(%rbp) ->| argument word 0 | + * |--------------------------|-------------------- + * 8(%rbp) ->| return address | + * |--------------------------| + * 0(%rbp) ->| previous %rbp | + * |--------------------------| + * -8(%rbp) ->| unspecified | (Current frame) + * | ... | + * 0(%rsp) ->| variable size | + * |--------------------------| + * -128(%rsp) ->| reserved for function | + * |--------------------------| + * + * The end of the input argument area must be aligned on a 16-byte + * boundary; i.e. (%rsp - 8) % 16 == 0 at function entry. + * + * The 128-byte location beyond %rsp is considered to be reserved for + * functions and is NOT modified by signal handlers. It can be used + * to store temporary data that is not needed across function calls. + */ + +/* + * Stack alignment macros. + */ + +#define STACK_ALIGN64 16 +#define STACK_ENTRY_ALIGN64 8 +#define STACK_BIAS64 0 +#define SA64(x) (((x)+(STACK_ALIGN64-1)) & ~(STACK_ALIGN64-1)) +#define STACK_RESERVE64 128 +#define MINFRAME64 0 + +#define STACK_ALIGN STACK_ALIGN64 +#define STACK_ENTRY_ALIGN STACK_ENTRY_ALIGN64 +#define STACK_BIAS STACK_BIAS64 +#define SA(x) SA64(x) +#define STACK_RESERVE STACK_RESERVE64 +#define MINFRAME MINFRAME64 + +#elif defined(__i386) + +#define STACK_ALIGN STACK_ALIGN32 +#define STACK_ENTRY_ALIGN STACK_ENTRY_ALIGN32 +#define STACK_BIAS STACK_BIAS32 +#define SA(x) SA32(x) +#define STACK_RESERVE STACK_RESERVE32 +#define MINFRAME MINFRAME32 + +#endif /* __i386 */ + +#endif /* _SYS_FRAME_H */ |