libmach

1 files changed, 233 insertions, 0 deletions

diff --git a/src/libmach/elf.h b/src/libmach/elf.h
new file mode 100644
index 00000000..6ed239bc
--- /dev/null
+++ b/src/libmach/elf.h
@@ -0,0 +1,233 @@
+/*
+ * Copyright (c) 2004 Russ Cox.  See LICENSE.
+ */
+
+/* /home/rsc/papers/elfXXelf.pdf */
+
+typedef struct Elf Elf;
+typedef struct ElfHdr ElfHdr;
+typedef struct ElfSect ElfSect;
+typedef struct ElfProg ElfProg;
+typedef struct ElfNote ElfNote;
+typedef struct ElfSym ElfSym;
+
+enum
+{
+	ElfClassNone = 0,
+	ElfClass32,
+	ElfClass64,
+
+	ElfDataNone = 0,
+	ElfDataLsb,
+	ElfDataMsb,
+
+	ElfTypeNone = 0,
+	ElfTypeRelocatable,
+	ElfTypeExecutable,
+	ElfTypeSharedObject,
+	ElfTypeCore,
+	/* 0xFF00 - 0xFFFF reserved for processor-specific types */
+
+	ElfMachNone = 0,
+	ElfMach32100,		/* AT&T WE 32100 */
+	ElfMachSparc,		/* SPARC */
+	ElfMach386,		/* Intel 80386 */
+	ElfMach68000,		/* Motorola 68000 */
+	ElfMach88000,		/* Motorola 88000 */
+	ElfMach486,		/* Intel 80486, no longer used */
+	ElfMach860,		/* Intel 80860 */
+	ElfMachMips,		/* MIPS RS3000 */
+	ElfMachS370,		/* IBM System/370 */
+	ElfMachMipsLe,	/* MIPS RS3000 LE */
+	ElfMachParisc = 15,		/* HP PA RISC */
+	ElfMachVpp500 = 17,	/* Fujitsu VPP500 */
+	ElfMachSparc32Plus,	/* SPARC V8+ */
+	ElfMach960,		/* Intel 80960 */
+	ElfMachPower,		/* PowerPC */
+	ElfMachPower64,	/* PowerPC 64 */
+	ElfMachS390,		/* IBM System/390 */
+	ElfMachV800 = 36,	/* NEC V800 */
+	ElfMachFr20,		/* Fujitsu FR20 */
+	ElfMachRh32,		/* TRW RH-32 */
+	ElfMachRce,		/* Motorola RCE */
+	ElfMachArm,		/* ARM */
+	ElfMachAlpha,		/* Digital Alpha */
+	ElfMachSH,		/* Hitachi SH */
+	ElfMachSparc9,		/* SPARC V9 */
+	/* and the list goes on... */
+
+	ElfAbiNone = 0,
+	ElfAbiSystemV = 0,	/* [sic] */
+	ElfAbiHPUX,
+	ElfAbiNetBSD,
+	ElfAbiLinux,
+	ElfAbiSolaris = 6,
+	ElfAbiAix,
+	ElfAbiIrix,
+	ElfAbiFreeBSD,
+	ElfAbiTru64,
+	ElfAbiModesto,
+	ElfAbiOpenBSD,
+	ElfAbiARM = 97,
+	ElfAbiEmbedded = 255,
+
+	/* some of sections 0xFF00 - 0xFFFF reserved for various things */
+	ElfSectNone = 0,
+	ElfSectProgbits,
+	ElfSectSymtab,
+	ElfSectStrtab,
+	ElfSectRela,
+	ElfSectHash,
+	ElfSectDynamic,
+	ElfSectNote,
+	ElfSectNobits,
+	ElfSectRel,
+	ElfSectShlib,
+	ElfSectDynsym,
+
+	ElfSectFlagWrite = 0x1,
+	ElfSectFlagAlloc = 0x2,
+	ElfSectFlagExec = 0x4,
+	/* 0xF0000000 are reserved for processor specific */
+
+	ElfSymBindLocal = 0,
+	ElfSymBindGlobal,
+	ElfSymBindWeak,
+	/* 13-15 reserved */
+
+	ElfSymTypeNone = 0,
+	ElfSymTypeObject,
+	ElfSymTypeFunc,
+	ElfSymTypeSection,
+	ElfSymTypeFile,
+	/* 13-15 reserved */
+
+	ElfSymShnNone = 0,
+	ElfSymShnAbs = 0xFFF1,
+	ElfSymShnCommon = 0xFFF2,
+	/* 0xFF00-0xFF1F reserved for processors */
+	/* 0xFF20-0xFF3F reserved for operating systems */
+
+	ElfProgNone = 0,
+	ElfProgLoad,
+	ElfProgDynamic,
+	ElfProgInterp,
+	ElfProgNote,
+	ElfProgShlib,
+	ElfProgPhdr,
+
+	ElfProgFlagExec = 0x1,
+	ElfProgFlagWrite = 0x2,
+	ElfProgFlagRead = 0x4,
+
+	ElfNotePrStatus = 1,
+	ElfNotePrFpreg = 2,
+	ElfNotePrPsinfo = 3,
+	ElfNotePrTaskstruct = 4,
+	ElfNotePrAuxv = 6,
+	ElfNotePrXfpreg = 0x46e62b7f,	/* for gdb/386 */
+};
+
+struct ElfHdr
+{
+	uchar	magic[4];
+	uchar	class;
+	uchar	encoding;
+	uchar	version;
+	uchar	abi;
+	uchar	abiversion;
+	u32int	type;
+	u32int	machine;
+	u32int	entry;
+	u32int	phoff;
+	u32int	shoff;
+	u32int	flags;
+	u32int	ehsize;
+	u32int	phentsize;
+	u32int	phnum;
+	u32int	shentsize;
+	u32int	shnum;
+	u32int	shstrndx;
+	u16int	(*e2)(uchar*);
+	u32int	(*e4)(uchar*);
+	u64int	(*e8)(uchar*);
+};
+
+struct ElfSect
+{
+	char		*name;
+	u32int	type;
+	u32int	flags;
+	u32int	addr;
+	u32int	offset;
+	u32int	size;
+	u32int	link;
+	u32int	info;
+	u32int	align;
+	u32int	entsize;
+	uchar	*base;
+};
+
+struct ElfProg
+{
+	u32int	type;
+	u32int	offset;
+	u32int	vaddr;
+	u32int	paddr;
+	u32int	filesz;
+	u32int	memsz;
+	u32int	flags;
+	u32int	align;
+};
+
+struct ElfNote
+{
+	u32int	namesz;
+	u32int	descsz;
+	u32int	type;
+	char	*name;
+	uchar	*desc;
+	u32int	offset;	/* in-memory only */
+};
+
+struct ElfSym
+{
+	char*	name;
+	u32int	value;
+	u32int	size;
+	uchar	bind;
+	uchar	type;
+	uchar	other;
+	u16int	shndx;
+};
+
+struct Elf
+{
+	int		fd;
+	ElfHdr	hdr;
+	ElfSect	*sect;
+	uint		nsect;
+	ElfProg	*prog;
+	uint		nprog;
+	char		*shstrtab;
+
+	int		nsymtab;
+	ElfSect	*symtab;
+	ElfSect	*symstr;
+	int		ndynsym;
+	ElfSect	*dynsym;
+	ElfSect	*dynstr;
+	ElfSect	*bss;
+
+	int		(*coreregs)(Elf*, ElfNote*, uchar**);
+};
+
+Elf*	elfopen(char*);
+Elf*	elfinit(int);
+ElfSect *elfsection(Elf*, char*);
+void	elfclose(Elf*);
+int	elfsym(Elf*, int, ElfSym*);
+int	elfmap(Elf*, ElfSect*);
+
+int	coreregslinux386(Elf*, ElfNote*, uchar**);
+int	coreregsfreebsd386(Elf*, ElfNote*, uchar**);