updates from Bernd Schmidt to sync with blackfin cvs

1 files changed, 127 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/bfin/link.h b/libc/sysdeps/linux/bfin/link.h
new file mode 100644
index 000000000..59caefc62
--- /dev/null
+++ b/libc/sysdeps/linux/bfin/link.h
@@ -0,0 +1,127 @@
+/* Data structure for communication from the run-time dynamic linker for
+   loaded ELF shared objects.
+   Copyright (C) 1995-1999, 2000, 2001, 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef	_LINK_H
+#define	_LINK_H	1
+
+#include <features.h>
+#include <elf.h>
+#include <dlfcn.h>
+#include <sys/types.h>
+
+/* We use this macro to refer to ELF types independent of the native wordsize.
+   `ElfW(TYPE)' is used in place of `Elf32_TYPE' or `Elf64_TYPE'.  */
+#define ElfW(type)	_ElfW (Elf, __ELF_NATIVE_CLASS, type)
+#define _ElfW(e,w,t)	_ElfW_1 (e, w, _##t)
+#define _ElfW_1(e,w,t)	e##w##t
+
+#include <bits/elfclass.h>		/* Defines __ELF_NATIVE_CLASS.  */
+
+/* Rendezvous structure used by the run-time dynamic linker to communicate
+   details of shared object loading to the debugger.  If the executable's
+   dynamic section has a DT_DEBUG element, the run-time linker sets that
+   element's value to the address where this structure can be found.  */
+
+struct r_debug
+  {
+    int r_version;		/* Version number for this protocol.  */
+
+    struct link_map *r_map;	/* Head of the chain of loaded objects.  */
+
+    /* This is the address of a function internal to the run-time linker,
+       that will always be called when the linker begins to map in a
+       library or unmap it, and again when the mapping change is complete.
+       The debugger can set a breakpoint at this address if it wants to
+       notice shared object mapping changes.  */
+    ElfW(Addr) r_brk;
+    enum
+      {
+	/* This state value describes the mapping change taking place when
+	   the `r_brk' address is called.  */
+	RT_CONSISTENT,		/* Mapping change is complete.  */
+	RT_ADD,			/* Beginning to add a new object.  */
+	RT_DELETE		/* Beginning to remove an object mapping.  */
+      } r_state;
+
+    ElfW(Addr) r_ldbase;	/* Base address the linker is loaded at.  */
+  };
+
+/* This is the instance of that structure used by the dynamic linker.  */
+extern struct r_debug _r_debug;
+
+/* This symbol refers to the "dynamic structure" in the `.dynamic' section
+   of whatever module refers to `_DYNAMIC'.  So, to find its own
+   `struct r_debug', a program could do:
+     for (dyn = _DYNAMIC; dyn->d_tag != DT_NULL; ++dyn)
+       if (dyn->d_tag == DT_DEBUG)
+	 r_debug = (struct r_debug *) dyn->d_un.d_ptr;
+   */
+extern ElfW(Dyn) _DYNAMIC[];
+
+#if defined __BFIN_FDPIC__
+# include <bits/elf-fdpic.h>
+#endif
+
+/* Structure describing a loaded shared object.  The `l_next' and `l_prev'
+   members form a chain of all the shared objects loaded at startup.
+
+   These data structures exist in space used by the run-time dynamic linker;
+   modifying them may have disastrous results.  */
+
+struct link_map
+  {
+    /* These first few members are part of the protocol with the debugger.
+       This is the same format used in SVR4.  */
+
+#ifdef __BFIN_FDPIC__
+    struct elf32_fdpic_loadaddr l_addr;
+#else
+    ElfW(Addr) l_addr;		/* Base address shared object is loaded at.  */
+#endif
+    char *l_name;		/* Absolute file name object was found in.  */
+    ElfW(Dyn) *l_ld;		/* Dynamic section of the shared object.  */
+    struct link_map *l_next, *l_prev; /* Chain of loaded objects.  */
+  };
+
+#ifdef __USE_GNU
+
+struct dl_phdr_info
+  {
+#ifdef __BFIN_FDPIC__
+    struct elf32_fdpic_loadaddr dlpi_addr;
+#else
+    ElfW(Addr) dlpi_addr;
+#endif
+    const char *dlpi_name;
+    const ElfW(Phdr) *dlpi_phdr;
+    ElfW(Half) dlpi_phnum;
+  };
+
+__BEGIN_DECLS
+
+extern int dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
+					     size_t size, void *data),
+			    void *data) __THROW;
+
+__END_DECLS
+
+#endif
+
+#endif /* link.h */