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authorEric Andersen <andersen@codepoet.org>2004-05-14 10:26:05 +0000
committerEric Andersen <andersen@codepoet.org>2004-05-14 10:26:05 +0000
commitf98d73a77145e0d56ae08c910ed4e9964fd28cff (patch)
treed384ba0c2d528483fbf4afd7146ea311a9f6c498
parent5f2bd77887a3163c5d82fe6abf17662f9c863cbd (diff)
Patch from Alexandre Oliva:
On Mar 20, 2004, Erik Andersen <andersen@codepoet.org> wrote: > If you supply a FR-V specific link.h header into > libc/sysdeps/linux/frv/ then you can do the same sortof > thing that mips does i.e. with sgidefs.h in the headers > target in libc/sysdeps/linux/mips/Makefile Thanks, this patch implements your suggestion.
-rw-r--r--libc/sysdeps/linux/frv/Makefile5
-rw-r--r--libc/sysdeps/linux/frv/link.h127
2 files changed, 130 insertions, 2 deletions
diff --git a/libc/sysdeps/linux/frv/Makefile b/libc/sysdeps/linux/frv/Makefile
index 28487f770..8e000b41b 100644
--- a/libc/sysdeps/linux/frv/Makefile
+++ b/libc/sysdeps/linux/frv/Makefile
@@ -1,6 +1,7 @@
# Makefile for uClibc
#
# Copyright (C) 2000-2003 Erik Andersen <andersen@uclibc.org>
+# ported to FR-V by Alexandre Oliva <aoliva@redhat.com>
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU Library General Public License as published by the Free
@@ -81,9 +82,9 @@ gcrt1.o: $(CRT0_DEPS)
endif
headers:
-
+ $(LN) -fs ../libc/sysdeps/linux/frv/link.h $(TOPDIR)/include/
clean:
rm -f *.[oa] *~ core
rm -f bits/sysnum.h
-
+ $(RM) $(TOPDIR)/include/link.h
diff --git a/libc/sysdeps/linux/frv/link.h b/libc/sysdeps/linux/frv/link.h
new file mode 100644
index 000000000..121608f2b
--- /dev/null
+++ b/libc/sysdeps/linux/frv/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[];
+
+#ifdef __FRV_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 __FRV_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 __FRV_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 */