Add support for "link sets", which are arrays of pointers to objects
gathered together in named sections by the linker.
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thorpej
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/* $NetBSD: cdefs.h,v 1.44 2002/10/10 17:02:23 thorpej Exp $ */
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/* $NetBSD: cdefs.h,v 1.45 2002/11/01 22:58:44 thorpej Exp $ */
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/*
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* Copyright (c) 1991, 1993
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@ -272,4 +272,53 @@
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#define __predict_false(exp) ((exp) != 0)
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#endif
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/*
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* Macros for manipulating "link sets". Link sets are arrays of pointers
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* to objects, which are gathered up by the linker.
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*
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* Object format-specific code has provided us with the following macros:
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*
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* __link_set_add_text(set, sym)
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* Add a reference to the .text symbol `sym' to `set'.
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*
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* __link_set_add_rodata(set, sym)
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* Add a reference to the .rodata symbol `sym' to `set'.
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*
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* __link_set_add_data(set, sym)
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* Add a reference to the .data symbol `sym' to `set'.
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*
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* __link_set_add_bss(set, sym)
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* Add a reference to the .bss symbol `sym' to `set'.
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*
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* __link_set_decl(set, ptype)
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* Provide an extern declaration of the set `set', which
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* contains an array of the pointer type `ptype'. This
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* macro must be used by any code which wishes to reference
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* the elements of a link set.
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*
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* __link_set_start(set)
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* This points to the first slot in the link set.
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*
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* __link_set_end(set)
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* This points to the (non-existent) slot after the last
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* entry in the link set.
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*
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* __link_set_count(set)
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* Count the number of entries in link set `set'.
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*
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* In addition, we provide the following macros for accessing link sets:
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*
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* __link_set_foreach(pvar, set)
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* Iterate over the link set `set'. Because a link set is
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* an array of pointers, pvar must be declared as "type **pvar",
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* and the actual entry accessed as "*pvar".
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*
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* __link_set_entry(set, idx)
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* Access the link set entry at index `idx' from set `set'.
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*/
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#define __link_set_foreach(pvar, set) \
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for (pvar = __link_set_start(set); pvar < __link_set_end(set); pvar++)
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#define __link_set_entry(set, idx) (__link_set_begin(set)[idx])
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#endif /* !_SYS_CDEFS_H_ */
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@ -1,4 +1,4 @@
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/* $NetBSD: cdefs_aout.h,v 1.10 2002/05/11 11:57:14 itohy Exp $ */
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/* $NetBSD: cdefs_aout.h,v 1.11 2002/11/01 22:58:44 thorpej Exp $ */
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/*
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* Written by J.T. Conklin <jtc@wimsey.com> 01/17/95.
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@ -68,4 +68,30 @@
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#define __KERNEL_SCCSID(_n,_s)
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#define __KERNEL_COPYRIGHT(_n, _s) __IDSTRING(__CONCAT(copyright,_n),_s)
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#ifdef __lint__
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#define __link_set_make_entry(set, sym, type) \
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static void const * const __link_set_##set##_sym_##sym = &sym; \
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__asm(".stabs \"___link_set_" #set "\", " #type ", 0, 0, _" #sym)
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#else
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#define __link_set_make_entry(set, sym, type) \
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extern void const * const __link_set_##set##_sym_##sym
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#endif /* __lint__ */
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#define __link_set_add_text(set, sym) __link_set_make_entry(set, sym, 23)
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#define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym, 23)
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#define __link_set_add_data(set, sym) __link_set_make_entry(set, sym, 25)
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#define __link_set_add_bss(set, sym) __link_set_make_entry(set, sym, 27)
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#define __link_set_decl(set, ptype) \
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extern struct { \
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int __ls_length; \
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ptype *__ls_items[1]; \
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} __link_set_##set
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#define __link_set_start(set) (&(__link_set_##set).__ls_items[0])
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#define __link_set_end(set) \
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(&(__link_set_##set).__ls_items[(__link_set_##set).__ls_length])
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#define __link_set_count(set) ((__link_set_##set).__ls_length)
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#endif /* !_SYS_CDEFS_AOUT_H_ */
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@ -1,4 +1,4 @@
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/* $NetBSD: cdefs_elf.h,v 1.12 2002/10/10 00:52:47 thorpej Exp $ */
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/* $NetBSD: cdefs_elf.h,v 1.13 2002/11/01 22:58:44 thorpej Exp $ */
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/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
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@ -112,4 +112,28 @@
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#define __KERNEL_COPYRIGHT(_n, _s) __SECTIONSTRING(.copyright, _s)
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#endif
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#ifndef __lint__
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#define __link_set_make_entry(set, sym) \
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static void const * const __link_set_##set##_sym_##sym \
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__section("link_set_" #set) __unused = &sym
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#else
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#define __link_set_make_entry(set, sym) \
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extern void const * const __link_set_##set##_sym_##sym
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#endif /* __lint__ */
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#define __link_set_add_text(set, sym) __link_set_make_entry(set, sym)
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#define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym)
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#define __link_set_add_data(set, sym) __link_set_make_entry(set, sym)
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#define __link_set_add_bss(set, sym) __link_set_make_entry(set, sym)
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#define __link_set_decl(set, ptype) \
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extern ptype *__start_link_set_##set; \
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extern ptype *__stop_link_set_##set
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#define __link_set_start(set) (&__start_link_set_##set)
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#define __link_set_end(set) (&__stop_link_set_##set)
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#define __link_set_count(set) \
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(__link_set_end(set) - __link_set_start(set))
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#endif /* !_SYS_CDEFS_ELF_H_ */
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