OpenSolaris Launch

1 files changed, 563 insertions, 0 deletions

diff --git a/usr/src/uts/common/sys/link.h b/usr/src/uts/common/sys/link.h
new file mode 100644
index 0000000000..52ed431632
--- /dev/null
+++ b/usr/src/uts/common/sys/link.h
@@ -0,0 +1,563 @@
+/*
+ * 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 (c) 1988 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_LINK_H
+#define	_SYS_LINK_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifndef	_ASM
+#include <sys/types.h>
+#include <sys/elftypes.h>
+#endif
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Communication structures for the runtime linker.
+ */
+
+/*
+ * The following data structure provides a self-identifying union consisting
+ * of a tag from a known list and a value.
+ */
+#ifndef	_ASM
+typedef struct {
+	Elf32_Sword d_tag;		/* how to interpret value */
+	union {
+		Elf32_Word	d_val;
+		Elf32_Addr	d_ptr;
+		Elf32_Off	d_off;
+	} d_un;
+} Elf32_Dyn;
+
+#if defined(_LP64) || defined(_LONGLONG_TYPE)
+typedef struct {
+	Elf64_Xword d_tag;		/* how to interpret value */
+	union {
+		Elf64_Xword	d_val;
+		Elf64_Addr	d_ptr;
+	} d_un;
+} Elf64_Dyn;
+#endif	/* defined(_LP64) || defined(_LONGLONG_TYPE) */
+#endif	/* _ASM */
+
+/*
+ * Tag values
+ */
+#define	DT_NULL		0	/* last entry in list */
+#define	DT_NEEDED	1	/* a needed object */
+#define	DT_PLTRELSZ	2	/* size of relocations for the PLT */
+#define	DT_PLTGOT	3	/* addresses used by procedure linkage table */
+#define	DT_HASH		4	/* hash table */
+#define	DT_STRTAB	5	/* string table */
+#define	DT_SYMTAB	6	/* symbol table */
+#define	DT_RELA		7	/* addr of relocation entries */
+#define	DT_RELASZ	8	/* size of relocation table */
+#define	DT_RELAENT	9	/* base size of relocation entry */
+#define	DT_STRSZ	10	/* size of string table */
+#define	DT_SYMENT	11	/* size of symbol table entry */
+#define	DT_INIT		12	/* _init addr */
+#define	DT_FINI		13	/* _fini addr */
+#define	DT_SONAME	14	/* name of this shared object */
+#define	DT_RPATH	15	/* run-time search path */
+#define	DT_SYMBOLIC	16	/* shared object linked -Bsymbolic */
+#define	DT_REL		17	/* addr of relocation entries */
+#define	DT_RELSZ	18	/* size of relocation table */
+#define	DT_RELENT	19	/* base size of relocation entry */
+#define	DT_PLTREL	20	/* relocation type for PLT entry */
+#define	DT_DEBUG	21	/* pointer to r_debug structure */
+#define	DT_TEXTREL	22	/* text relocations remain for this object */
+#define	DT_JMPREL	23	/* pointer to the PLT relocation entries */
+#define	DT_BIND_NOW	24	/* perform all relocations at load of object */
+#define	DT_INIT_ARRAY	25	/* pointer to .initarray */
+#define	DT_FINI_ARRAY	26	/* pointer to .finiarray */
+#define	DT_INIT_ARRAYSZ	27	/* size of .initarray */
+#define	DT_FINI_ARRAYSZ	28	/* size of .finiarray */
+#define	DT_RUNPATH	29	/* run-time search path */
+#define	DT_FLAGS	30	/* state flags - see DF_* */
+
+#define	DT_ENCODING		32    /* DT_* encoding rules start after this */
+#define	DT_PREINIT_ARRAY	32    /* pointer to .preinitarray segment */
+#define	DT_PREINIT_ARRAYSZ	33    /* size of .preinitarray segment */
+
+#define	DT_MAXPOSTAGS		34	/* number of positive tags */
+
+#define	DT_LOOS			0x6000000d	/* OS specific range */
+#define	DT_SUNW_AUXILIARY	0x6000000d	/* symbol auxiliary name */
+#define	DT_SUNW_RTLDINF		0x6000000e	/* ld.so.1 info (private) */
+#define	DT_SUNW_FILTER		0x6000000f	/* symbol filter name */
+#define	DT_SUNW_CAP		0x60000010	/* hardware/software */
+						/*	capabilities */
+#define	DT_HIOS			0x6ffff000
+
+/*
+ * The following values have been deprecated and remain here to allow
+ * compatibility with older binaries.
+ */
+#define	DT_DEPRECATED_SPARC_REGISTER	0x7000001
+
+/*
+ * DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the
+ * Dyn.d_un.d_val field of the Elf*_Dyn structure.
+ */
+#define	DT_VALRNGLO	0x6ffffd00
+#define	DT_CHECKSUM	0x6ffffdf8	/* elf checksum */
+#define	DT_PLTPADSZ	0x6ffffdf9	/* pltpadding size */
+#define	DT_MOVEENT	0x6ffffdfa	/* move table entry size */
+#define	DT_MOVESZ	0x6ffffdfb	/* move table size */
+#define	DT_FEATURE_1	0x6ffffdfc	/* feature holder */
+#define	DT_POSFLAG_1	0x6ffffdfd	/* flags for DT_* entries, effecting */
+					/*	the following DT_* entry. */
+					/*	See DF_P1_* definitions */
+#define	DT_SYMINSZ	0x6ffffdfe	/* syminfo table size (in bytes) */
+#define	DT_SYMINENT	0x6ffffdff	/* syminfo entry size (in bytes) */
+#define	DT_VALRNGHI	0x6ffffdff
+
+/*
+ * DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the
+ * Dyn.d_un.d_ptr field of the Elf*_Dyn structure.
+ *
+ * If any adjustment is made to the ELF object after it has been
+ * built, these entries will need to be adjusted.
+ */
+#define	DT_ADDRRNGLO	0x6ffffe00
+#define	DT_CONFIG	0x6ffffefa	/* configuration information */
+#define	DT_DEPAUDIT	0x6ffffefb	/* dependency auditing */
+#define	DT_AUDIT	0x6ffffefc	/* object auditing */
+#define	DT_PLTPAD	0x6ffffefd	/* pltpadding (sparcv9) */
+#define	DT_MOVETAB	0x6ffffefe	/* move table */
+#define	DT_SYMINFO	0x6ffffeff	/* syminfo table */
+#define	DT_ADDRRNGHI	0x6ffffeff
+
+/*
+ * The following DT_* entries should have been assigned within one of the
+ * DT_* ranges, but existed before such ranges had been established.
+ */
+#define	DT_VERSYM	0x6ffffff0	/* version symbol table - unused */
+
+#define	DT_RELACOUNT	0x6ffffff9	/* number of RELATIVE relocations */
+#define	DT_RELCOUNT	0x6ffffffa	/* number of RELATIVE relocations */
+#define	DT_FLAGS_1	0x6ffffffb	/* state flags - see DF_1_* defs */
+#define	DT_VERDEF	0x6ffffffc	/* version definition table and */
+#define	DT_VERDEFNUM	0x6ffffffd	/*	associated no. of entries */
+#define	DT_VERNEED	0x6ffffffe	/* version needed table and */
+#define	DT_VERNEEDNUM	0x6fffffff	/* 	associated no. of entries */
+
+/*
+ * DT_* entries between DT_HIPROC and DT_LOPROC are reserved for processor
+ * specific semantics.
+ */
+#define	DT_LOPROC	0x70000000	/* processor specific range */
+#define	DT_AUXILIARY	0x7ffffffd	/* shared library auxiliary name */
+#define	DT_USED		0x7ffffffe	/* ignored - same as needed */
+#define	DT_FILTER	0x7fffffff	/* shared library filter name */
+#define	DT_HIPROC	0x7fffffff
+
+
+/*
+ * Values for DT_FLAGS
+ */
+#define	DF_ORIGIN	0x00000001	/* ORIGIN processing required */
+#define	DF_SYMBOLIC	0x00000002	/* symbolic bindings in effect */
+#define	DF_TEXTREL	0x00000004	/* text relocations remain */
+#define	DF_BIND_NOW	0x00000008	/* process all relocations */
+#define	DF_STATIC_TLS	0x00000010	/* obj. contains static TLS refs */
+
+/*
+ * Values for the DT_POSFLAG_1 .dynamic entry.
+ * These values only affect the following DT_* entry.
+ */
+#define	DF_P1_LAZYLOAD	0x00000001	/* following object is to be */
+					/*	lazy loaded */
+#define	DF_P1_GROUPPERM	0x00000002	/* following object's symbols are */
+					/*	not available for general */
+					/*	symbol bindings. */
+/*
+ * Values for the DT_FLAGS_1 .dynamic entry.
+ */
+#define	DF_1_NOW	0x00000001	/* set RTLD_NOW for this object */
+#define	DF_1_GLOBAL	0x00000002	/* set RTLD_GLOBAL for this object */
+#define	DF_1_GROUP	0x00000004	/* set RTLD_GROUP for this object */
+#define	DF_1_NODELETE	0x00000008	/* set RTLD_NODELETE for this object */
+#define	DF_1_LOADFLTR	0x00000010	/* trigger filtee loading at runtime */
+#define	DF_1_INITFIRST	0x00000020	/* set RTLD_INITFIRST for this object */
+#define	DF_1_NOOPEN	0x00000040	/* set RTLD_NOOPEN for this object */
+#define	DF_1_ORIGIN	0x00000080	/* ORIGIN processing required */
+#define	DF_1_DIRECT	0x00000100	/* direct binding enabled */
+#define	DF_1_TRANS	0x00000200
+#define	DF_1_INTERPOSE	0x00000400	/* object is an 'interposer' */
+#define	DF_1_NODEFLIB	0x00000800	/* ignore default library search path */
+#define	DF_1_NODUMP	0x00001000	/* object can't be dldump(3x)'ed */
+#define	DF_1_CONFALT	0x00002000	/* configuration alternative created */
+#define	DF_1_ENDFILTEE	0x00004000	/* filtee terminates filters search */
+#define	DF_1_DISPRELDNE	0x00008000	/* disp reloc applied at build time */
+#define	DF_1_DISPRELPND	0x00010000	/* disp reloc applied at run-time */
+#define	DF_1_NODIRECT	0x00020000	/* object contains symbols that */
+					/*	cannot be directly bound to */
+#define	DF_1_IGNMULDEF	0x00040000	/* krtld link should muldef'd syms */
+#define	DF_1_NOKSYMS	0x00080000	/* object's symbols should not be */
+					/*	exported via /dev/ksyms */
+#define	DF_1_NORELOC	0x00400000
+
+/*
+ * Values set to DT_FEATURE tag's d_val.
+ */
+#define	DTF_1_PARINIT	0x00000001	/* partially initialization feature */
+#define	DTF_1_CONFEXP	0x00000002	/* configuration file expected */
+
+
+/*
+ * Version structures.  There are three types of version structure:
+ *
+ *  o	A definition of the versions within the image itself.
+ *	Each version definition is assigned a unique index (starting from
+ *	VER_NDX_BGNDEF)	which is used to cross-reference symbols associated to
+ *	the version.  Each version can have one or more dependencies on other
+ *	version definitions within the image.  The version name, and any
+ *	dependency names, are specified in the version definition auxiliary
+ *	array.  Version definition entries require a version symbol index table.
+ *
+ *  o	A version requirement on a needed dependency.  Each needed entry
+ *	specifies the shared object dependency (as specified in DT_NEEDED).
+ *	One or more versions required from this dependency are specified in the
+ *	version needed auxiliary array.
+ *
+ *  o	A version symbol index table.  Each symbol indexes into this array
+ *	to determine its version index.  Index values of VER_NDX_BGNDEF or
+ *	greater indicate the version definition to which a symbol is associated.
+ *	(the size of a symbol index entry is recorded in the sh_info field).
+ */
+#ifndef	_ASM
+
+typedef struct {			/* Version Definition Structure. */
+	Elf32_Half	vd_version;	/* this structures version revision */
+	Elf32_Half	vd_flags;	/* version information */
+	Elf32_Half	vd_ndx;		/* version index */
+	Elf32_Half	vd_cnt;		/* no. of associated aux entries */
+	Elf32_Word	vd_hash;	/* version name hash value */
+	Elf32_Word	vd_aux;		/* no. of bytes from start of this */
+					/*	verdef to verdaux array */
+	Elf32_Word	vd_next;	/* no. of bytes from start of this */
+} Elf32_Verdef;				/*	verdef to next verdef entry */
+
+typedef struct {			/* Verdef Auxiliary Structure. */
+	Elf32_Word	vda_name;	/* first element defines the version */
+					/*	name. Additional entries */
+					/*	define dependency names. */
+	Elf32_Word	vda_next;	/* no. of bytes from start of this */
+} Elf32_Verdaux;			/*	verdaux to next verdaux entry */
+
+
+typedef	struct {			/* Version Requirement Structure. */
+	Elf32_Half	vn_version;	/* this structures version revision */
+	Elf32_Half	vn_cnt;		/* no. of associated aux entries */
+	Elf32_Word	vn_file;	/* name of needed dependency (file) */
+	Elf32_Word	vn_aux;		/* no. of bytes from start of this */
+					/*	verneed to vernaux array */
+	Elf32_Word	vn_next;	/* no. of bytes from start of this */
+} Elf32_Verneed;			/*	verneed to next verneed entry */
+
+typedef struct {			/* Verneed Auxiliary Structure. */
+	Elf32_Word	vna_hash;	/* version name hash value */
+	Elf32_Half	vna_flags;	/* version information */
+	Elf32_Half	vna_other;
+	Elf32_Word	vna_name;	/* version name */
+	Elf32_Word	vna_next;	/* no. of bytes from start of this */
+} Elf32_Vernaux;			/*	vernaux to next vernaux entry */
+
+typedef	Elf32_Half 	Elf32_Versym;	/* Version symbol index array */
+
+typedef struct {
+	Elf32_Half	si_boundto;	/* direct bindings - symbol bound to */
+	Elf32_Half	si_flags;	/* per symbol flags */
+} Elf32_Syminfo;
+
+
+#if defined(_LP64) || defined(_LONGLONG_TYPE)
+typedef struct {
+	Elf64_Half	vd_version;	/* this structures version revision */
+	Elf64_Half	vd_flags;	/* version information */
+	Elf64_Half	vd_ndx;		/* version index */
+	Elf64_Half	vd_cnt;		/* no. of associated aux entries */
+	Elf64_Word	vd_hash;	/* version name hash value */
+	Elf64_Word	vd_aux;		/* no. of bytes from start of this */
+					/*	verdef to verdaux array */
+	Elf64_Word	vd_next;	/* no. of bytes from start of this */
+} Elf64_Verdef;				/*	verdef to next verdef entry */
+
+typedef struct {
+	Elf64_Word	vda_name;	/* first element defines the version */
+					/*	name. Additional entries */
+					/*	define dependency names. */
+	Elf64_Word	vda_next;	/* no. of bytes from start of this */
+} Elf64_Verdaux;			/*	verdaux to next verdaux entry */
+
+typedef struct {
+	Elf64_Half	vn_version;	/* this structures version revision */
+	Elf64_Half	vn_cnt;		/* no. of associated aux entries */
+	Elf64_Word	vn_file;	/* name of needed dependency (file) */
+	Elf64_Word	vn_aux;		/* no. of bytes from start of this */
+					/*	verneed to vernaux array */
+	Elf64_Word	vn_next;	/* no. of bytes from start of this */
+} Elf64_Verneed;			/*	verneed to next verneed entry */
+
+typedef struct {
+	Elf64_Word	vna_hash;	/* version name hash value */
+	Elf64_Half	vna_flags;	/* version information */
+	Elf64_Half	vna_other;
+	Elf64_Word	vna_name;	/* version name */
+	Elf64_Word	vna_next;	/* no. of bytes from start of this */
+} Elf64_Vernaux;			/*	vernaux to next vernaux entry */
+
+typedef	Elf64_Half	Elf64_Versym;
+
+typedef struct {
+	Elf64_Half	si_boundto;	/* direct bindings - symbol bound to */
+	Elf64_Half	si_flags;	/* per symbol flags */
+} Elf64_Syminfo;
+#endif	/* defined(_LP64) || defined(_LONGLONG_TYPE) */
+
+#endif	/* _ASM */
+
+/*
+ * Versym symbol index values.  Values greater than VER_NDX_GLOBAL
+ * and less then VER_NDX_LORESERVE associate symbols with user
+ * specified version descriptors.
+ */
+#define	VER_NDX_LOCAL		0	/* symbol is local */
+#define	VER_NDX_GLOBAL		1	/* symbol is global and assigned to */
+					/*	the base version */
+#define	VER_NDX_LORESERVE	0xff00	/* beginning of RESERVED entries */
+#define	VER_NDX_ELIMINATE	0xff01	/* symbol is to be eliminated */
+
+/*
+ * Verdef and Verneed (via Veraux) flags values.
+ */
+#define	VER_FLG_BASE		0x1	/* version definition of file itself */
+#define	VER_FLG_WEAK		0x2	/* weak version identifier */
+
+/*
+ * Verdef version values.
+ */
+#define	VER_DEF_NONE		0	/* Ver_def version */
+#define	VER_DEF_CURRENT		1
+#define	VER_DEF_NUM		2
+
+/*
+ * Verneed version values.
+ */
+#define	VER_NEED_NONE		0	/* Ver_need version */
+#define	VER_NEED_CURRENT	1
+#define	VER_NEED_NUM		2
+
+
+/*
+ * Syminfo flag values
+ */
+#define	SYMINFO_FLG_DIRECT	0x0001	/* symbol ref has direct association */
+					/*	to object containing defn. */
+#define	SYMINFO_FLG_PASSTHRU	0x0002	/* ignored - see SYMINFO_FLG_FILTER */
+#define	SYMINFO_FLG_COPY	0x0004	/* symbol is a copy-reloc */
+#define	SYMINFO_FLG_LAZYLOAD	0x0008	/* object containing defn should be */
+					/*	lazily-loaded */
+#define	SYMINFO_FLG_DIRECTBIND	0x0010	/* ref should be bound directly to */
+					/*	object containing defn. */
+#define	SYMINFO_FLG_NOEXTDIRECT	0x0020	/* don't let an external reference */
+					/*	directly bind to this symbol */
+#define	SYMINFO_FLG_FILTER	0x0002	/* symbol ref is associated to a */
+#define	SYMINFO_FLG_AUXILIARY	0x0040	/* 	standard or auxiliary filter */
+
+/*
+ * Syminfo.si_boundto values.
+ */
+#define	SYMINFO_BT_SELF		0xffff	/* symbol bound to self */
+#define	SYMINFO_BT_PARENT	0xfffe	/* symbol bound to parent */
+#define	SYMINFO_BT_NONE		0xfffd	/* no special symbol binding */
+#define	SYMINFO_BT_EXTERN	0xfffc	/* symbol defined as external */
+#define	SYMINFO_BT_LOWRESERVE	0xff00	/* beginning of reserved entries */
+
+/*
+ * Syminfo version values.
+ */
+#define	SYMINFO_NONE		0	/* Syminfo version */
+#define	SYMINFO_CURRENT		1
+#define	SYMINFO_NUM		2
+
+
+/*
+ * Public structure defined and maintained within the runtime linker
+ */
+#ifndef	_ASM
+
+typedef struct link_map	Link_map;
+
+struct link_map {
+	unsigned long	l_addr;		/* address at which object is mapped */
+	char 		*l_name;	/* full name of loaded object */
+#ifdef _LP64
+	Elf64_Dyn	*l_ld;		/* dynamic structure of object */
+#else
+	Elf32_Dyn	*l_ld;		/* dynamic structure of object */
+#endif
+	Link_map	*l_next;	/* next link object */
+	Link_map	*l_prev;	/* previous link object */
+	char		*l_refname;	/* filters reference name */
+};
+
+#ifdef _SYSCALL32
+typedef struct link_map32 Link_map32;
+
+struct link_map32 {
+	Elf32_Word	l_addr;
+	Elf32_Addr	l_name;
+	Elf32_Addr	l_ld;
+	Elf32_Addr	l_next;
+	Elf32_Addr	l_prev;
+	Elf32_Addr	l_refname;
+};
+#endif
+
+typedef enum {
+	RT_CONSISTENT,
+	RT_ADD,
+	RT_DELETE
+} r_state_e;
+
+typedef enum {
+	RD_FL_NONE = 0,		/* no flags */
+	RD_FL_ODBG = (1<<0),	/* old style debugger present */
+	RD_FL_DBG = (1<<1)	/* debugging enabled */
+} rd_flags_e;
+
+
+
+/*
+ * Debugging events enabled inside of the runtime linker.  To
+ * access these events see the librtld_db interface.
+ */
+typedef enum {
+	RD_NONE = 0,		/* no event */
+	RD_PREINIT,		/* the Initial rendezvous before .init */
+	RD_POSTINIT,		/* the Second rendezvous after .init */
+	RD_DLACTIVITY		/* a dlopen or dlclose has happened */
+} rd_event_e;
+
+struct r_debug {
+	int		r_version;	/* debugging info version no. */
+	Link_map	*r_map;		/* address of link_map */
+	unsigned long	r_brk;		/* address of update routine */
+	r_state_e	r_state;
+	unsigned long	r_ldbase;	/* base addr of ld.so */
+	Link_map	*r_ldsomap;	/* address of ld.so.1's link map */
+	rd_event_e	r_rdevent;	/* debug event */
+	rd_flags_e	r_flags;	/* misc flags. */
+};
+
+#ifdef _SYSCALL32
+struct r_debug32 {
+	Elf32_Word	r_version;	/* debugging info version no. */
+	Elf32_Addr	r_map;		/* address of link_map */
+	Elf32_Word	r_brk;		/* address of update routine */
+	r_state_e	r_state;
+	Elf32_Word	r_ldbase;	/* base addr of ld.so */
+	Elf32_Addr	r_ldsomap;	/* address of ld.so.1's link map */
+	rd_event_e	r_rdevent;	/* debug event */
+	rd_flags_e	r_flags;	/* misc flags. */
+};
+#endif
+
+
+#define	R_DEBUG_VERSION	2		/* current r_debug version */
+#endif	/* _ASM */
+
+/*
+ * Attribute/value structures used to bootstrap ELF-based dynamic linker.
+ */
+#ifndef	_ASM
+typedef struct {
+	Elf32_Sword eb_tag;		/* what this one is */
+	union {				/* possible values */
+		Elf32_Word eb_val;
+		Elf32_Addr eb_ptr;
+		Elf32_Off  eb_off;
+	} eb_un;
+} Elf32_Boot;
+
+#if defined(_LP64) || defined(_LONGLONG_TYPE)
+typedef struct {
+	Elf64_Xword eb_tag;		/* what this one is */
+	union {				/* possible values */
+		Elf64_Xword eb_val;
+		Elf64_Addr eb_ptr;
+		Elf64_Off eb_off;
+	} eb_un;
+} Elf64_Boot;
+#endif	/* defined(_LP64) || defined(_LONGLONG_TYPE) */
+#endif	/* _ASM */
+
+/*
+ * Attributes
+ */
+#define	EB_NULL		0		/* (void) last entry */
+#define	EB_DYNAMIC	1		/* (*) dynamic structure of subject */
+#define	EB_LDSO_BASE	2		/* (caddr_t) base address of ld.so */
+#define	EB_ARGV		3		/* (caddr_t) argument vector */
+#define	EB_ENVP		4		/* (char **) environment strings */
+#define	EB_AUXV		5		/* (auxv_t *) auxiliary vector */
+#define	EB_DEVZERO	6		/* (int) fd for /dev/zero */
+#define	EB_PAGESIZE	7		/* (int) page size */
+#define	EB_MAX		8		/* number of "EBs" */
+#define	EB_MAX_SIZE32	64		/* size in bytes, _ILP32 */
+#define	EB_MAX_SIZE64	128		/* size in bytes, _LP64 */
+
+
+#ifndef	_ASM
+
+#ifdef __STDC__
+
+/*
+ * Concurrency communication structure for libc callbacks.
+ */
+extern void	_ld_libc(void *);
+#else /* __STDC__ */
+extern void	_ld_libc();
+#endif /* __STDC__ */
+
+#pragma unknown_control_flow(_ld_libc)
+#endif /* _ASM */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_LINK_H */