#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/fcntl.h>
#include <sys/unistd.h>
#include <erl.h>
#include <hashtab.h>
#include <recycle.h>

Include dependency graph for erl.c:

Go to the source code of this file.

Data Structures
struct	elf_header_t

struct	elf_section_t

struct	elf_symbol_t

struct	elf_reloc_t

struct	elf_rela_t

struct	loosy_t

struct	dependancy_t

union	elf_header_t.e_ident

struct	e_ident_t.e_ident.cook

Macros
#define	DEBUG 1

#define	STANDALONE 1

#define	FORCE_ALIGN 1

#define	dprintf(a...) do { } while(0)

#define	rprintf(a...) do { } while(0)

#define	REL_TYPE 1

#define	PROGBITS 1

#define	NOBITS 8

#define	REL 9

#define	RELA 4

#define	GLOBAL 1

#define	WEAK 2

#define	NOTYPE 0

#define	OBJECT 1

#define	FUNC 2

#define	SECTION 3

#define	R_MIPS_32 2

#define	R_MIPS_26 4

#define	R_MIPS_HI16 5

#define	R_MIPS_LO16 6

#define	free_and_return(code)

#define	O_BINARY 0

Typedefs
typedef unsigned char	u8

typedef unsigned short	u16

typedef unsigned int	u32

typedef signed char	s8

typedef signed short	s16

typedef signed int	s32

typedef int(*	func_t) (void)

typedef int(*	start_t) (int argc, char **argv)

Functions
static u32	align (u32 x, int align)

static struct loosy_t *	create_loosy (struct erl_record_t erl, u8 reloc, int type)

static void	destroy_loosy (struct loosy_t *l)

static void	r_destroy_loosy (struct loosy_t *l)

static struct symbol_t *	create_symbol (struct erl_record_t *provider, u32 address)

static void	destroy_symbol (struct symbol_t *s)

static struct erl_record_t *	allocate_erl_record ()

static void	destroy_erl_record (struct erl_record_t *erl)

static int	apply_reloc (u8 *reloc, int type, u32 addr)

struct symbol_t *	erl_find_local_symbol (const char symbol, struct erl_record_t erl)

static struct symbol_t *	r_find_symbol (const char symbol, struct erl_record_t erl)

struct symbol_t *	erl_find_symbol (const char *symbol)

static struct dependancy_t *	add_dependancy (struct erl_record_t depender, struct erl_record_t provider)

static void	destroy_dependancy (struct dependancy_t *d)

static void	r_destroy_dependancy_r (struct erl_record_t erl, struct dependancy_t d)

static void	destroy_dependancy_r (struct erl_record_t *erl)

static void	add_loosy (struct erl_record_t erl, u8 reloc, int type, const char *symbol)

static int	fix_loosy (struct erl_record_t provider, const char symbol, u32 address)

static int	is_local (const char *symbol)

static int	add_symbol (struct erl_record_t erl, const char symbol, u32 address)

int	erl_add_global_symbol (const char *symbol, u32 address)

static int	read_erl (int elf_handle, u8 elf_mem, u32 addr, struct erl_record_t *p_erl_record)

static struct erl_record_t *	_init_load_erl_wrapper_from_file (char *erl_id)

static struct erl_record_t *	load_erl (const char fname, u8 elf_mem, u32 addr, int argc, char **argv)

struct erl_record_t *	_init_load_erl_from_file (const char fname, char erl_id)

struct erl_record_t *	load_erl_from_file (const char fname, int argc, char *argv)

struct erl_record_t *	load_erl_from_mem (u8 mem, int argc, char *argv)

struct erl_record_t *	load_erl_from_mem_to_addr (u8 mem, u32 addr, int argc, char *argv)

struct erl_record_t *	load_erl_from_file_to_addr (const char fname, u32 addr, int argc, char *argv)

struct erl_record_t *	_init_load_erl_from_file_to_addr (const char fname, u32 addr, char erl_id)

void	r_unload_dependancies (char **d)

int	unload_erl (struct erl_record_t *erl)

struct erl_record_t *	erl_resolve (u32 address)

struct erl_record_t *	find_erl (const char *name)

void	erl_flush_symbols (struct erl_record_t *erl)

Variables
static const char *	local_names []

static struct erl_record_t *	erl_record_root = 0

static htab *	global_symbols = 0

static htab *	loosy_relocs = 0

char	_init_erl_prefix [256] = ""

static struct dependancy_t *	dependancy_root = 0

static reroot *	symbol_recycle = 0

erl_loader_t	_init_load_erl = _init_load_erl_wrapper_from_file

Detailed Description

The relocatable elf loader/linker.

Definition in file erl.c.

Data Structure Documentation

◆ elf_section_t

struct elf_section_t

Definition at line 245 of file erl.c.

Data Fields
u32	sh_name
u32	sh_type
u32	sh_flags
u32	sh_addr
u32	sh_offset
u32	sh_size
u32	sh_link
u32	sh_info
u32	sh_addralign
u32	sh_entsize

◆ elf_symbol_t

struct elf_symbol_t

Definition at line 250 of file erl.c.

Data Fields
u32	st_name
u32	st_value
u32	st_size
u8	st_info
u8	st_other
u16	st_shndx

◆ elf_reloc_t

struct elf_reloc_t

Definition at line 256 of file erl.c.

Data Fields
u32	r_offset
u32	r_info

◆ elf_rela_t

struct elf_rela_t

Definition at line 260 of file erl.c.

Data Fields
u32	r_offset
u32	r_info
u32	r_addend

◆ loosy_t

struct loosy_t

Definition at line 266 of file erl.c.

Collaboration diagram for loosy_t:

Data Fields
u8 *	reloc
int	type
struct loosy_t *	next
struct erl_record_t *	erl

◆ dependancy_t

struct dependancy_t

Definition at line 273 of file erl.c.

Collaboration diagram for dependancy_t:

Data Fields
struct erl_record_t *	depender
struct erl_record_t *	provider
struct dependancy_t *	next
struct dependancy_t *	prev

◆ elf_header_t.e_ident

union elf_header_t.e_ident

Definition at line 221 of file erl.c.

Data Fields
u8	raw[16]
struct e_ident_t.e_ident.cook	cook

◆ elf_header_t::e_ident_t.e_ident.cook

struct elf_header_t::e_ident_t.e_ident.cook

Definition at line 223 of file erl.c.

Data Fields
u8	ei_magic[4]
u8	ei_class
u8	ei_data
u8	ei_version

Macro Definition Documentation

◆ DEBUG

#define DEBUG 1

Definition at line 16 of file erl.c.

◆ STANDALONE

#define STANDALONE 1

Definition at line 17 of file erl.c.

◆ FORCE_ALIGN

#define FORCE_ALIGN 1

Definition at line 18 of file erl.c.

◆ dprintf

#define dprintf ( a... ) do { } while(0)

Definition at line 33 of file erl.c.

◆ rprintf

#define rprintf ( a... ) do { } while(0)

Definition at line 34 of file erl.c.

◆ REL_TYPE

#define REL_TYPE 1

Definition at line 187 of file erl.c.

◆ PROGBITS

#define PROGBITS 1

Definition at line 188 of file erl.c.

◆ NOBITS

#define NOBITS 8

Definition at line 189 of file erl.c.

◆ REL

#define REL 9

Definition at line 190 of file erl.c.

◆ RELA

#define RELA 4

Definition at line 191 of file erl.c.

◆ GLOBAL

#define GLOBAL 1

Definition at line 192 of file erl.c.

◆ WEAK

#define WEAK 2

Definition at line 193 of file erl.c.

◆ NOTYPE

#define NOTYPE 0

Definition at line 194 of file erl.c.

◆ OBJECT

#define OBJECT 1

Definition at line 195 of file erl.c.

◆ FUNC

#define FUNC 2

Definition at line 196 of file erl.c.

◆ SECTION

#define SECTION 3

Definition at line 197 of file erl.c.

◆ R_MIPS_32

#define R_MIPS_32 2

Definition at line 198 of file erl.c.

◆ R_MIPS_26

#define R_MIPS_26 4

Definition at line 199 of file erl.c.

◆ R_MIPS_HI16

#define R_MIPS_HI16 5

Definition at line 200 of file erl.c.

◆ R_MIPS_LO16

#define R_MIPS_LO16 6

Definition at line 201 of file erl.c.

◆ free_and_return

#define free_and_return ( code )

Value:

    if (!elf_mem) { \
    if (names) free(names); \
    if (strtab_names) free(strtab_names); \
    if (sec) free(sec); \
    if (sym) free(sym); \
    if ((code < 0) && erl_record) destroy_erl_record(erl_record); \
} \
return code

◆ O_BINARY

#define O_BINARY 0

Definition at line 929 of file erl.c.

Typedef Documentation

◆ u8

typedef unsigned char u8

Definition at line 63 of file erl.c.

◆ u16

typedef unsigned short u16

Definition at line 64 of file erl.c.

◆ u32

typedef unsigned int u32

Definition at line 65 of file erl.c.

◆ s8

typedef signed char s8

Definition at line 66 of file erl.c.

◆ s16

typedef signed short s16

Definition at line 67 of file erl.c.

◆ s32

typedef signed int s32

Definition at line 68 of file erl.c.

◆ func_t

typedef int(* func_t) (void)

Definition at line 932 of file erl.c.

◆ start_t

typedef int(* start_t) (int argc, char **argv)

Definition at line 933 of file erl.c.

Function Documentation

◆ align()

static u32 align	(	u32	x,
		int	align
	)

static

Definition at line 290 of file erl.c.

◆ create_loosy()

static struct loosy_t * create_loosy	(	struct erl_record_t *	erl,
		u8 *	reloc,
		int	type
	)

static

Definition at line 306 of file erl.c.

◆ destroy_loosy()

static void destroy_loosy ( struct loosy_t * l )

static

Definition at line 320 of file erl.c.

◆ r_destroy_loosy()

static void r_destroy_loosy ( struct loosy_t * l )

static

Definition at line 324 of file erl.c.

◆ create_symbol()

static struct symbol_t * create_symbol	(	struct erl_record_t *	provider,
		u32	address
	)

static

Definition at line 335 of file erl.c.

◆ destroy_symbol()

static void destroy_symbol ( struct symbol_t * s )

static

Definition at line 349 of file erl.c.

◆ allocate_erl_record()

static struct erl_record_t * allocate_erl_record ( )

static

Definition at line 353 of file erl.c.

◆ destroy_erl_record()

static void destroy_erl_record ( struct erl_record_t * erl )

static

Definition at line 372 of file erl.c.

◆ apply_reloc()

static int apply_reloc	(	u8 *	reloc,
		int	type,
		u32	addr
	)

static

Definition at line 396 of file erl.c.

◆ erl_find_local_symbol()

struct symbol_t * erl_find_local_symbol	(	const char *	symbol,
		struct erl_record_t *	erl
	)

Definition at line 431 of file erl.c.

◆ r_find_symbol()

static struct symbol_t * r_find_symbol	(	const char *	symbol,
		struct erl_record_t *	erl
	)

static

Definition at line 439 of file erl.c.

◆ erl_find_symbol()

struct symbol_t * erl_find_symbol ( const char * symbol )

Definition at line 447 of file erl.c.

◆ add_dependancy()

static struct dependancy_t * add_dependancy	(	struct erl_record_t *	depender,
		struct erl_record_t *	provider
	)

static

Definition at line 454 of file erl.c.

◆ destroy_dependancy()

static void destroy_dependancy ( struct dependancy_t * d )

static

Definition at line 475 of file erl.c.

◆ r_destroy_dependancy_r()

static void r_destroy_dependancy_r	(	struct erl_record_t *	erl,
		struct dependancy_t *	d
	)

static

Definition at line 487 of file erl.c.

◆ destroy_dependancy_r()

static void destroy_dependancy_r ( struct erl_record_t * erl )

static

Definition at line 499 of file erl.c.

◆ add_loosy()

static void add_loosy	(	struct erl_record_t *	erl,
		u8 *	reloc,
		int	type,
		const char *	symbol
	)

static

Definition at line 503 of file erl.c.

◆ fix_loosy()

static int fix_loosy	(	struct erl_record_t *	provider,
		const char *	symbol,
		u32	address
	)

static

Definition at line 519 of file erl.c.

◆ is_local()

static int is_local ( const char * symbol )

static

Definition at line 540 of file erl.c.

◆ add_symbol()

static int add_symbol	(	struct erl_record_t *	erl,
		const char *	symbol,
		u32	address
	)

static

Definition at line 550 of file erl.c.

◆ erl_add_global_symbol()

int erl_add_global_symbol	(	const char *	symbol,
		u32	address
	)

Definition at line 578 of file erl.c.

◆ read_erl()

static int read_erl	(	int	elf_handle,
		u8 *	elf_mem,
		u32	addr,
		struct erl_record_t **	p_erl_record
	)

static

Definition at line 582 of file erl.c.

◆ _init_load_erl_wrapper_from_file()

static struct erl_record_t * _init_load_erl_wrapper_from_file ( char * erl_id )

static

Definition at line 935 of file erl.c.

◆ load_erl()

static struct erl_record_t * load_erl	(	const char *	fname,
		u8 *	elf_mem,
		u32	addr,
		int	argc,
		char **	argv
	)

static

Definition at line 944 of file erl.c.

◆ _init_load_erl_from_file()

struct erl_record_t * _init_load_erl_from_file	(	const char *	fname,
		char *	erl_id
	)

Definition at line 1016 of file erl.c.

◆ load_erl_from_file()

struct erl_record_t * load_erl_from_file	(	const char *	fname,
		int	argc,
		char **	argv
	)

Definition at line 1035 of file erl.c.

◆ load_erl_from_mem()

struct erl_record_t * load_erl_from_mem	(	u8 *	mem,
		int	argc,
		char **	argv
	)

Definition at line 1039 of file erl.c.

◆ load_erl_from_mem_to_addr()

struct erl_record_t * load_erl_from_mem_to_addr	(	u8 *	mem,
		u32	addr,
		int	argc,
		char **	argv
	)

Definition at line 1046 of file erl.c.

◆ load_erl_from_file_to_addr()

struct erl_record_t * load_erl_from_file_to_addr	(	const char *	fname,
		u32	addr,
		int	argc,
		char **	argv
	)

Definition at line 1053 of file erl.c.

◆ _init_load_erl_from_file_to_addr()

struct erl_record_t * _init_load_erl_from_file_to_addr	(	const char *	fname,
		u32	addr,
		char *	erl_id
	)

Definition at line 1060 of file erl.c.

◆ r_unload_dependancies()

void r_unload_dependancies ( char ** d )

Definition at line 1079 of file erl.c.

◆ unload_erl()

int unload_erl ( struct erl_record_t * erl )

Definition at line 1090 of file erl.c.

◆ erl_resolve()

struct erl_record_t * erl_resolve ( u32 address )

Definition at line 1127 of file erl.c.

◆ find_erl()

struct erl_record_t * find_erl ( const char * name )

Definition at line 1139 of file erl.c.

◆ erl_flush_symbols()

void erl_flush_symbols ( struct erl_record_t * erl )

Definition at line 1151 of file erl.c.

Variable Documentation

◆ local_names

const char* local_names[]

static

Initial value:

= {
    "_init",
    "_fini",
    "erl_id",
    "erl_dependancies",
    "erl_copyright",
    "erl_version",
    "_start",
    0
}

Definition at line 206 of file erl.c.

◆ erl_record_root

struct erl_record_t* erl_record_root = 0

static

Definition at line 280 of file erl.c.

◆ global_symbols

htab* global_symbols = 0

static

Definition at line 282 of file erl.c.

◆ loosy_relocs

htab* loosy_relocs = 0

static

Definition at line 283 of file erl.c.

◆ _init_erl_prefix

char _init_erl_prefix[256] = ""

Definition at line 285 of file erl.c.

◆ dependancy_root

struct dependancy_t* dependancy_root = 0

static

Definition at line 287 of file erl.c.

◆ symbol_recycle

reroot* symbol_recycle = 0

static

Definition at line 333 of file erl.c.

◆ _init_load_erl

erl_loader_t _init_load_erl = _init_load_erl_wrapper_from_file

Definition at line 942 of file erl.c.

Data Structures

Macros

Typedefs

Functions

Variables

Detailed Description

Data Structure Documentation

◆ elf_section_t

◆ elf_symbol_t

◆ elf_reloc_t

◆ elf_rela_t

◆ loosy_t

◆ dependancy_t

◆ elf_header_t.e_ident

◆ elf_header_t::e_ident_t.e_ident.cook

Macro Definition Documentation

◆ DEBUG

◆ STANDALONE

◆ FORCE_ALIGN

◆ dprintf

◆ rprintf

◆ REL_TYPE

◆ PROGBITS

◆ NOBITS

◆ REL

◆ RELA

◆ GLOBAL

◆ WEAK

◆ NOTYPE

◆ OBJECT

◆ FUNC

◆ SECTION

◆ R_MIPS_32

◆ R_MIPS_26

◆ R_MIPS_HI16

◆ R_MIPS_LO16

◆ free_and_return

◆ O_BINARY

Typedef Documentation

◆ u8

◆ u16

◆ u32

◆ s8

◆ s16

◆ s32

◆ func_t

◆ start_t

Function Documentation

◆ align()

◆ create_loosy()

◆ destroy_loosy()

◆ r_destroy_loosy()

◆ create_symbol()

◆ destroy_symbol()

◆ allocate_erl_record()

◆ destroy_erl_record()

◆ apply_reloc()

◆ erl_find_local_symbol()

◆ r_find_symbol()

◆ erl_find_symbol()

◆ add_dependancy()

◆ destroy_dependancy()

◆ r_destroy_dependancy_r()

◆ destroy_dependancy_r()

◆ add_loosy()

◆ fix_loosy()

◆ is_local()

◆ add_symbol()

◆ erl_add_global_symbol()

◆ read_erl()

◆ _init_load_erl_wrapper_from_file()

◆ load_erl()

◆ _init_load_erl_from_file()

◆ load_erl_from_file()

◆ load_erl_from_mem()

◆ load_erl_from_mem_to_addr()

◆ load_erl_from_file_to_addr()

◆ _init_load_erl_from_file_to_addr()

◆ r_unload_dependancies()

◆ unload_erl()