[Scummvm-cvs-logs] SF.net SVN: scummvm:[51192] scummvm/branches/gsoc2010-plugins/backends/ plugins/elf32.h
toneman1138 at users.sourceforge.net
toneman1138 at users.sourceforge.net
Fri Jul 23 07:15:12 CEST 2010
Revision: 51192
http://scummvm.svn.sourceforge.net/scummvm/?rev=51192&view=rev
Author: toneman1138
Date: 2010-07-23 05:15:11 +0000 (Fri, 23 Jul 2010)
Log Message:
-----------
Added abstracted elf32 header file to plugins directory
Added Paths:
-----------
scummvm/branches/gsoc2010-plugins/backends/plugins/elf32.h
Added: scummvm/branches/gsoc2010-plugins/backends/plugins/elf32.h
===================================================================
--- scummvm/branches/gsoc2010-plugins/backends/plugins/elf32.h (rev 0)
+++ scummvm/branches/gsoc2010-plugins/backends/plugins/elf32.h 2010-07-23 05:15:11 UTC (rev 51192)
@@ -0,0 +1,229 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program 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 General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef BACKENDS_ELF_H
+#define BACKENDS_ELF_H
+
+/* ELF stuff */
+
+typedef unsigned short Elf32_Half, Elf32_Section;
+typedef unsigned int Elf32_Word, Elf32_Addr, Elf32_Off;
+typedef signed int Elf32_Sword;
+typedef Elf32_Half Elf32_Versym;
+
+#define EI_NIDENT (16)
+#define SELFMAG 6
+
+/* ELF File format structures. Look up ELF structure for more details */
+
+// ELF header (contains info about the file)
+typedef struct {
+ unsigned char e_ident[EI_NIDENT]; /* Magic number and other info */
+ Elf32_Half e_type; /* Object file type */
+ Elf32_Half e_machine; /* Architecture */
+ Elf32_Word e_version; /* Object file version */
+ Elf32_Addr e_entry; /* Entry point virtual address */
+ Elf32_Off e_phoff; /* Program header table file offset */
+ Elf32_Off e_shoff; /* Section header table file offset */
+ Elf32_Word e_flags; /* Processor-specific flags */
+ Elf32_Half e_ehsize; /* ELF header size in bytes */
+ Elf32_Half e_phentsize; /* Program header table entry size */
+ Elf32_Half e_phnum; /* Program header table entry count */
+ Elf32_Half e_shentsize; /* Section header table entry size */
+ Elf32_Half e_shnum; /* Section header table entry count */
+ Elf32_Half e_shstrndx; /* Section header string table index */
+} Elf32_Ehdr;
+
+// Should be in e_ident
+#define ELFMAG "\177ELF\1\1" /* ELF Magic number */
+
+// e_type values
+#define ET_NONE 0 /* no file type */
+#define ET_REL 1 /* relocatable */
+#define ET_EXEC 2 /* executable */
+#define ET_DYN 3 /* shared object */
+#define ET_CORE 4 /* core file */
+
+// e_machine values
+#define EM_MIPS 8
+#define EM_ARM 40
+
+// Program header (contains info about segment)
+typedef struct {
+ Elf32_Word p_type; /* Segment type */
+ Elf32_Off p_offset; /* Segment file offset */
+ Elf32_Addr p_vaddr; /* Segment virtual address */
+ Elf32_Addr p_paddr; /* Segment physical address */
+ Elf32_Word p_filesz; /* Segment size in file */
+ Elf32_Word p_memsz; /* Segment size in memory */
+ Elf32_Word p_flags; /* Segment flags */
+ Elf32_Word p_align; /* Segment alignment */
+} Elf32_Phdr;
+
+// p_type values
+#define PT_NULL 0 /* ignored */
+#define PT_LOAD 1 /* loadable segment */
+#define PT_DYNAMIC 2 /* dynamic linking info */
+#define PT_INTERP 3 /* info about interpreter */
+#define PT_NOTE 4 /* note segment */
+#define PT_SHLIB 5 /* reserved */
+#define PT_PHDR 6 /* Program header table */
+#define PT_MIPS_REGINFO 0x70000000 /* Register usage info for MIPS */
+#define PT_ARM_ARCHEXT 0x70000000 /* Platform architecture compatibility info for ARM */
+#define PT_ARM_EXIDX 0x70000001 /* Exception unwind tables for ARM */
+
+// p_flags value
+#define PF_X 1 /* execute */
+#define PF_W 2 /* write */
+#define PF_R 4 /* read */
+
+// Section header (contains info about section)
+typedef struct {
+ Elf32_Word sh_name; /* Section name (string tbl index) */
+ Elf32_Word sh_type; /* Section type */
+ Elf32_Word sh_flags; /* Section flags */
+ Elf32_Addr sh_addr; /* Section virtual addr at execution */
+ Elf32_Off sh_offset; /* Section file offset */
+ Elf32_Word sh_size; /* Section size in bytes */
+ Elf32_Word sh_link; /* Link to another section */
+ Elf32_Word sh_info; /* Additional section information */
+ Elf32_Word sh_addralign; /* Section alignment */
+ Elf32_Word sh_entsize; /* Entry size if section holds table */
+} Elf32_Shdr;
+
+// sh_type values
+#define SHT_NULL 0 /* Inactive section */
+#define SHT_PROGBITS 1 /* Proprietary */
+#define SHT_SYMTAB 2 /* Symbol table */
+#define SHT_STRTAB 3 /* String table */
+#define SHT_RELA 4 /* Relocation entries with addend */
+#define SHT_HASH 5 /* Symbol hash table */
+#define SHT_DYNAMIC 6 /* Info for dynamic linking */
+#define SHT_NOTE 7 /* Note section */
+#define SHT_NOBITS 8 /* Occupies no space */
+#define SHT_REL 9 /* Relocation entries without addend */
+#define SHT_SHLIB 10 /* Reserved */
+#define SHT_DYNSYM 11 /* Minimal set of dynamic linking symbols */
+#define SHT_MIPS_LIBLSIT 0x70000000 /* Info about dynamic shared object libs for MIPS*/
+#define SHT_MIPS_CONFLICT 0x70000002 /* Conflicts btw executables and shared objects for MIPS */
+#define SHT_MIPS_GPTAB 0x70000003 /* Global pointer table for MIPS*/
+#define SHT_ARM_EXIDX 0x70000001 /* Exception Index table for ARM*/
+#define SHT_ARM_PREEMPTMAP 0x70000002 /* BPABI DLL dynamic linking pre-emption map for ARM */
+#define SHT_ARM_ATTRIBUTES 0x70000003 /* Object file compatibility attributes for ARM*/
+
+// sh_flags values
+#define SHF_WRITE 0 /* writable section */
+#define SHF_ALLOC 2 /* section occupies memory */
+#define SHF_EXECINSTR 4 /* machine instructions */
+#define SHF_MIPS_GPREL 0x10000000 /* Must be made part of global data area for MIPS */
+
+// Symbol entry (contain info about a symbol)
+typedef struct {
+ Elf32_Word st_name; /* Symbol name (string tbl index) */
+ Elf32_Addr st_value; /* Symbol value */
+ Elf32_Word st_size; /* Symbol size */
+ unsigned char st_info; /* Symbol type and binding */
+ unsigned char st_other; /* Symbol visibility */
+ Elf32_Section st_shndx; /* Section index */
+} Elf32_Sym;
+
+// Extract from the st_info
+#define SYM_TYPE(x) ((x)&0xF)
+#define SYM_BIND(x) ((x)>>4)
+
+// Symbol binding values from st_info
+#define STB_LOCAL 0 /* Symbol not visible outside object */
+#define STB_GLOBAL 1 /* Symbol visible to all object files */
+#define STB_WEAK 2 /* Similar to STB_GLOBAL */
+
+// Symbol type values from st_info
+#define STT_NOTYPE 0 /* Not specified */
+#define STT_OBJECT 1 /* Data object e.g. variable */
+#define STT_FUNC 2 /* Function */
+#define STT_SECTION 3 /* Section */
+#define STT_FILE 4 /* Source file associated with object file */
+
+// Special section header index values from st_shndex
+#define SHN_UNDEF 0
+#define SHN_LOPROC 0xFF00 /* Extended values */
+#define SHN_ABS 0xFFF1 /* Absolute value: don't relocate */
+#define SHN_COMMON 0xFFF2 /* Common block. Not allocated yet */
+#define SHN_HIPROC 0xFF1F
+#define SHN_HIRESERVE 0xFFFF
+
+// Relocation entry with implicit addend (info about how to relocate)
+typedef struct {
+ Elf32_Addr r_offset; /* Address */
+ Elf32_Word r_info; /* Relocation type and symbol index */
+} Elf32_Rel;
+
+// Relocation entry with explicit addend (info about how to relocate)
+typedef struct
+{
+ Elf32_Addr r_offset; /* Address */
+ Elf32_Word r_info; /* Relocation type and symbol index */
+ Elf32_Sword r_addend; /* Addend */
+} Elf32_Rela;
+
+// Access macros for the relocation info
+#define REL_TYPE(x) ((unsigned char) (x)) /* Extract relocation type */
+#define REL_INDEX(x) ((x)>>8) /* Extract relocation index into symbol table */
+
+//MIPS relocation types
+#define R_MIPS_NONE 0
+#define R_MIPS_16 1
+#define R_MIPS_32 2
+#define R_MIPS_REL32 3
+#define R_MIPS_26 4
+#define R_MIPS_HI16 5
+#define R_MIPS_LO16 6
+#define R_MIPS_GPREL16 7
+#define R_MIPS_LITERAL 8
+#define R_MIPS_GOT16 9
+#define R_MIPS_PC16 10
+#define R_MIPS_CALL16 11
+#define R_MIPS_GPREL32 12
+#define R_MIPS_GOTHI16 13
+#define R_MIPS_GOTLO16 14
+#define R_MIPS_CALLHI16 15
+#define R_MIPS_CALLLO16 16
+
+// ARM relocation types
+#define R_ARM_NONE 0
+#define R_ARM_ABS32 2
+#define R_ARM_THM_CALL 10
+#define R_ARM_CALL 28
+#define R_ARM_JUMP24 29
+#define R_ARM_TARGET1 38
+#define R_ARM_V4BX 40
+
+// Mock function to get value of global pointer for MIPS
+#define getGP() ({ \
+ unsigned int __valgp; \
+ __asm__ ("add %0, $gp, $0" : "=r"(__valgp) : ); \
+ __valgp; \
+})
+
+#endif /* BACKENDS_ELF_H */
Property changes on: scummvm/branches/gsoc2010-plugins/backends/plugins/elf32.h
___________________________________________________________________
Added: svn:mime-type
+ text/plain
Added: svn:keywords
+ Id URL
Added: svn:eol-style
+ native
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