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.

1 files changed, 195 insertions, 0 deletions

diff --git a/sys/sys/elf_common.h b/sys/sys/elf_common.h
new file mode 100644
index 0000000..179c819
--- /dev/null
+++ b/sys/sys/elf_common.h
@@ -0,0 +1,195 @@
+/*-
+ * 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_COMMON_H_
+#define _SYS_ELF_COMMON_H_ 1
+
+/*
+ * ELF definitions that are independent of architecture or word size.
+ */
+
+/* Indexes into the e_ident array. */
+#define EI_MAG0		0	/* Magic number, byte 0. */
+#define EI_MAG1		1	/* Magic number, byte 1. */
+#define EI_MAG2		2	/* Magic number, byte 2. */
+#define EI_MAG3		3	/* Magic number, byte 3. */
+#define EI_CLASS	4	/* Class of machine. */
+#define EI_DATA		5	/* Data format. */
+#define EI_VERSION	6	/* ELF format version. */
+#define EI_PAD		7	/* Start of padding (per SVR4 ABI). */
+#define EI_BRAND	8	/* Start of architecture identification. */
+#define EI_NIDENT	16	/* Size of e_ident array. */
+
+/* Values for the magic number bytes. */
+#define ELFMAG0		0x7f
+#define ELFMAG1		'E'
+#define ELFMAG2		'L'
+#define ELFMAG3		'F'
+
+/* Values for e_ident[EI_VERSION] and e_version. */
+#define EV_NONE		0
+#define EV_CURRENT	1
+
+/* Values for e_ident[EI_CLASS]. */
+#define ELFCLASSNONE	0	/* Unknown class. */
+#define ELFCLASS32	1	/* 32-bit architecture. */
+#define ELFCLASS64	2	/* 64-bit architecture. */
+
+/* Values for e_ident[EI_DATA]. */
+#define ELFDATANONE	0	/* Unknown data format. */
+#define ELFDATA2LSB	1	/* 2's complement little-endian. */
+#define ELFDATA2MSB	2	/* 2's complement big-endian. */
+
+/* e_ident */
+#define IS_ELF(ehdr)	((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
+			 (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
+			 (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
+			 (ehdr).e_ident[EI_MAG3] == ELFMAG3)
+
+/* Values for e_type. */
+#define ET_NONE		0	/* Unknown type. */
+#define ET_REL		1	/* Relocatable. */
+#define ET_EXEC		2	/* Executable. */
+#define ET_DYN		3	/* Shared object. */
+#define ET_CORE		4	/* Core file. */
+
+/* Values for e_machine. */
+#define EM_NONE		0	/* Unknown machine. */
+#define EM_M32		1	/* AT&T WE32100. */
+#define EM_SPARC	2	/* Sun SPARC. */
+#define EM_386		3	/* Intel i386. */
+#define EM_68K		4	/* Motorola 68000. */
+#define EM_88K		5	/* Motorola 88000. */
+#define EM_486		6	/* Intel i486. */
+#define EM_860		7	/* Intel i860. */
+#define EM_MIPS		8	/* MIPS R3000 Big-Endian only */
+
+/* Extensions */
+#define EM_MIPS_RS4_BE	10	/* MIPS R4000 Big-Endian */
+#define EM_SPARC64	11	/* SPARC v9 64-bit unoffical */
+#define EM_PARISC	15	/* HPPA */
+#define EM_PPC		20	/* PowerPC */
+#define EM_ALPHA	0x9026	/* Alpha */
+
+/* Special section indexes. */
+#define SHN_UNDEF	     0		/* Undefined, missing, irrelevant. */
+#define SHN_LORESERVE	0xff00		/* First of reserved range. */
+#define SHN_LOPROC	0xff00		/* First processor-specific. */
+#define SHN_HIPROC	0xff1f		/* Last processor-specific. */
+#define SHN_ABS		0xfff1		/* Absolute values. */
+#define SHN_COMMON	0xfff2		/* Common data. */
+#define SHN_HIRESERVE	0xffff		/* Last of reserved range. */
+
+/* sh_type */
+#define SHT_NULL	0		/* inactive */
+#define SHT_PROGBITS	1		/* program defined information */
+#define SHT_SYMTAB	2		/* symbol table section */
+#define SHT_STRTAB	3		/* string table section */
+#define SHT_RELA	4		/* relocation section with addends*/
+#define SHT_HASH	5		/* symbol hash table section */
+#define SHT_DYNAMIC	6		/* dynamic section */ 
+#define SHT_NOTE	7		/* note section */
+#define SHT_NOBITS	8		/* no space section */
+#define SHT_REL		9		/* relation section without addends */
+#define SHT_SHLIB	10		/* reserved - purpose unknown */
+#define SHT_DYNSYM	11		/* dynamic symbol table section */ 
+#define SHT_LOPROC	0x70000000	/* reserved range for processor */
+#define SHT_HIPROC	0x7fffffff	/* specific section header types */
+#define SHT_LOUSER	0x80000000	/* reserved range for application */
+#define SHT_HIUSER	0xffffffff	/* specific indexes */
+
+/* Values for p_type. */
+#define PT_NULL		0	/* Unused entry. */
+#define PT_LOAD		1	/* Loadable segment. */
+#define PT_DYNAMIC	2	/* Dynamic linking information segment. */
+#define PT_INTERP	3	/* Pathname of interpreter. */
+#define PT_NOTE		4	/* Auxiliary information. */
+#define PT_SHLIB	5	/* Reserved (not used). */
+#define PT_PHDR		6	/* Location of program header itself. */
+
+#define PT_COUNT	7	/* Number of defined p_type values. */
+
+#define PT_LOPROC	0x70000000	/* First processor-specific type. */
+#define PT_HIPROC	0x7fffffff	/* Last processor-specific type. */
+
+/* Values for p_flags. */
+#define PF_X		0x1	/* Executable. */
+#define PF_W		0x2	/* Writable. */
+#define PF_R		0x4	/* Readable. */
+
+/* Values for d_tag. */
+#define DT_NULL		0	/* Terminating entry. */
+#define DT_NEEDED	1	/* String table offset of a needed shared
+				   library. */
+#define DT_PLTRELSZ	2	/* Total size in bytes of PLT relocations. */
+#define DT_PLTGOT	3	/* Processor-dependent address. */
+#define DT_HASH		4	/* Address of symbol hash table. */
+#define DT_STRTAB	5	/* Address of string table. */
+#define DT_SYMTAB	6	/* Address of symbol table. */
+#define DT_RELA		7	/* Address of ElfNN_Rela relocations. */
+#define DT_RELASZ	8	/* Total size of ElfNN_Rela relocations. */
+#define DT_RELAENT	9	/* Size of each ElfNN_Rela relocation entry. */
+#define DT_STRSZ	10	/* Size of string table. */
+#define DT_SYMENT	11	/* Size of each symbol table entry. */
+#define DT_INIT		12	/* Address of initialization function. */
+#define DT_FINI		13	/* Address of finalization function. */
+#define DT_SONAME	14	/* String table offset of shared object
+				   name. */
+#define DT_RPATH	15	/* String table offset of library path. */
+#define DT_SYMBOLIC	16	/* Indicates "symbolic" linking. */
+#define DT_REL		17	/* Address of ElfNN_Rel relocations. */
+#define DT_RELSZ	18	/* Total size of ElfNN_Rel relocations. */
+#define DT_RELENT	19	/* Size of each ElfNN_Rel relocation. */
+#define DT_PLTREL	20	/* Type of relocation used for PLT. */
+#define DT_DEBUG	21	/* Reserved (not used). */
+#define DT_TEXTREL	22	/* Indicates there may be relocations in
+				   non-writable segments. */
+#define DT_JMPREL	23	/* Address of PLT relocations. */
+
+#define DT_COUNT	24	/* Number of defined d_tag values. */
+
+/* Symbol Binding - ELFNN_ST_BIND - st_info */
+#define STB_LOCAL	0	/* Local symbol */
+#define STB_GLOBAL	1	/* Global symbol */
+#define STB_WEAK	2	/* like global - lower precedence */
+#define STB_LOPROC	13	/* reserved range for processor */
+#define STB_HIPROC	15	/*  specific symbol bindings */
+
+/* Symbol type - ELFNN_ST_TYPE - st_info */
+#define STT_NOTYPE	0	/* Unspecified type. */
+#define STT_OBJECT	1	/* Data object. */
+#define STT_FUNC	2	/* Function. */
+#define STT_SECTION	3	/* Section. */
+#define STT_FILE	4	/* Source file. */
+#define STT_LOPROC	13	/* reserved range for processor */
+#define STT_HIPROC	15	/*  specific symbol types */
+
+/* Special symbol table indexes. */
+#define STN_UNDEF	0	/* Undefined symbol index. */
+
+#endif /* !_SYS_ELF_COMMON_H_ */