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authorJohn Polstra <jdp@FreeBSD.org>1998-08-16 03:03:38 +0000
committerJohn Polstra <jdp@FreeBSD.org>1998-08-16 03:03:38 +0000
commitca0154bc75ee77173d081888f72d8ef4dac53500 (patch)
tree2e30dd2cf1efd3026c3e090be9bdce32b3771d06 /sys/sys/elf_generic.h
parent6ebae469d00d7699595a8fa99bb32ea80ee5e9af (diff)
downloadsrc-ca0154bc75ee77173d081888f72d8ef4dac53500.tar.gz
src-ca0154bc75ee77173d081888f72d8ef4dac53500.zip
Revamp the ELF include files to better support architecture-independent
applications. Here's how it works. The kernel should include <machine/elf.h> to get the definitions for the native architecture. It can reference the various ELF structures with generic names like Elf_Sym, Elf_Shdr, etc. A define __ELF_WORD_SIZE is also available with the value 32 or 64 as appropriate for the native architecture. Generic applications should include <elf.h>, which is just a wrapper for <machine/elf.h>. Applications such as object file dumpers that need to deal with foreign ELF files can include <sys/elf32.h> and/or <sys/elf64.h>. Both can be included from the same source file if desired. The structure names must be referenced using wordsize-specific names like Elf32_Sym, Elf64_Shdr, etc. I haven't change the alpha stuff, but I haven't broken it either.
Notes
Notes: svn path=/head/; revision=38357
Diffstat (limited to 'sys/sys/elf_generic.h')
-rw-r--r--sys/sys/elf_generic.h68
1 files changed, 68 insertions, 0 deletions
diff --git a/sys/sys/elf_generic.h b/sys/sys/elf_generic.h
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+++ b/sys/sys/elf_generic.h
@@ -0,0 +1,68 @@
+/*-
+ * Copyright (c) 1998 John D. Polstra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id$
+ */
+
+#ifndef _SYS_ELF_GENERIC_H_
+#define _SYS_ELF_GENERIC_H_ 1
+
+#include <sys/cdefs.h>
+
+/*
+ * Definitions of generic ELF names which relieve applications from
+ * needing to know the word size.
+ */
+
+#if __ELF_WORD_SIZE != 32 && __ELF_WORD_SIZE != 64
+#error "__ELF_WORD_SIZE must be defined as 32 or 64"
+#endif
+
+#define __ElfN(x) __CONCAT(__CONCAT(__CONCAT(Elf,__ELF_WORD_SIZE),_),x)
+#define __ELFN(x) __CONCAT(__CONCAT(__CONCAT(ELF,__ELF_WORD_SIZE),_),x)
+#define __ElfType(x) typedef __ElfN(x) __CONCAT(Elf_,x)
+
+__ElfType(Addr);
+__ElfType(Half);
+__ElfType(Off);
+__ElfType(Sword);
+__ElfType(Word);
+__ElfType(Size);
+__ElfType(Ehdr);
+__ElfType(Shdr);
+__ElfType(Phdr);
+__ElfType(Dyn);
+__ElfType(Rel);
+__ElfType(Rela);
+__ElfType(Sym);
+
+#define ELF_R_SYM __ELFN(R_SYM)
+#define ELF_R_TYPE __ELFN(R_TYPE)
+#define ELF_R_INFO __ELFN(R_INFO)
+#define ELF_ST_BIND __ELFN(ST_BIND)
+#define ELF_ST_TYPE __ELFN(ST_TYPE)
+#define ELF_ST_INFO __ELFN(ST_INFO)
+
+#endif /* !_SYS_ELF_GENERIC_H_ */