#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]
e_ident	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

◆ 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

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.

Data Structures

Macros

Typedefs

Functions

Variables