/*
|
/*
|
* linux/fs/binfmt_elf.c
|
* linux/fs/binfmt_elf.c
|
*
|
*
|
* These are the functions used to load ELF format executables as used
|
* These are the functions used to load ELF format executables as used
|
* on SVr4 machines. Information on the format may be found in the book
|
* on SVr4 machines. Information on the format may be found in the book
|
* "UNIX SYSTEM V RELEASE 4 Programmers Guide: Ansi C and Programming Support
|
* "UNIX SYSTEM V RELEASE 4 Programmers Guide: Ansi C and Programming Support
|
* Tools".
|
* Tools".
|
*
|
*
|
* Copyright 1993, 1994: Eric Youngdale (ericy@cais.com).
|
* Copyright 1993, 1994: Eric Youngdale (ericy@cais.com).
|
*/
|
*/
|
|
|
#include <linux/module.h>
|
#include <linux/module.h>
|
|
|
#include <linux/fs.h>
|
#include <linux/fs.h>
|
#include <linux/stat.h>
|
#include <linux/stat.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/mm.h>
|
#include <linux/mm.h>
|
#include <linux/mman.h>
|
#include <linux/mman.h>
|
#include <linux/a.out.h>
|
#include <linux/a.out.h>
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/signal.h>
|
#include <linux/signal.h>
|
#include <linux/binfmts.h>
|
#include <linux/binfmts.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/fcntl.h>
|
#include <linux/fcntl.h>
|
#include <linux/ptrace.h>
|
#include <linux/ptrace.h>
|
#include <linux/malloc.h>
|
#include <linux/malloc.h>
|
#include <linux/shm.h>
|
#include <linux/shm.h>
|
#include <linux/personality.h>
|
#include <linux/personality.h>
|
#include <linux/elfcore.h>
|
#include <linux/elfcore.h>
|
|
|
#include <asm/segment.h>
|
#include <asm/segment.h>
|
#include <asm/pgtable.h>
|
#include <asm/pgtable.h>
|
|
|
#include <linux/config.h>
|
#include <linux/config.h>
|
|
|
#define DLINFO_ITEMS 12
|
#define DLINFO_ITEMS 12
|
|
|
#include <linux/elf.h>
|
#include <linux/elf.h>
|
|
|
#define JUMP_TO_MAIN 0
|
#define JUMP_TO_MAIN 0
|
#define STACK_SIZE (64*PAGE_SIZE)
|
#define STACK_SIZE (64*PAGE_SIZE)
|
|
|
static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs);
|
static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs);
|
|
|
#define ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(ELF_EXEC_PAGESIZE-1))
|
#define ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(ELF_EXEC_PAGESIZE-1))
|
#define ELF_PAGEOFFSET(_v) ((_v) & (ELF_EXEC_PAGESIZE-1))
|
#define ELF_PAGEOFFSET(_v) ((_v) & (ELF_EXEC_PAGESIZE-1))
|
|
|
static struct linux_binfmt elf_format =
|
static struct linux_binfmt elf_format =
|
{
|
{
|
#ifndef MODULE
|
#ifndef MODULE
|
NULL, NULL, load_elf_binary, NULL, NULL
|
NULL, NULL, load_elf_binary, NULL, NULL
|
#else
|
#else
|
NULL, &mod_use_count_, load_elf_binary, load_elf_library, elf_core_dump
|
NULL, &mod_use_count_, load_elf_binary, load_elf_library, elf_core_dump
|
#endif
|
#endif
|
};
|
};
|
|
|
struct sec_add {
|
struct sec_add {
|
unsigned long pm_add;
|
unsigned long pm_add;
|
unsigned long vm_add;
|
unsigned long vm_add;
|
int len;
|
int len;
|
} sec[ELF_SECTION_NB];
|
} sec[ELF_SECTION_NB];
|
|
|
unsigned short *or32_consth_add = (unsigned short *)NULL;
|
unsigned short *or32_consth_add = (unsigned short *)NULL;
|
unsigned long or32_consth_rel;
|
unsigned long or32_consth_rel;
|
|
|
#if JUMP_TO_MAIN
|
#if JUMP_TO_MAIN
|
unsigned long *create_elf_tables(char *p, int argc, int envc, struct pt_regs *regs)
|
unsigned long *create_elf_tables(char *p, int argc, int envc, struct pt_regs *regs)
|
{
|
{
|
unsigned long *argv, *envp;
|
unsigned long *argv, *envp;
|
unsigned long *sp;
|
unsigned long *sp;
|
|
|
/*
|
/*
|
* Force 16 byte alignment here for generality.
|
* Force 16 byte alignment here for generality.
|
*/
|
*/
|
sp = (unsigned long *) (~15UL & (unsigned long) p);
|
sp = (unsigned long *) (~15UL & (unsigned long) p);
|
sp -= 2;
|
sp -= 2;
|
sp -= envc + 1;
|
sp -= envc + 1;
|
envp = sp;
|
envp = sp;
|
sp -= argc + 1;
|
sp -= argc + 1;
|
argv = sp;
|
argv = sp;
|
|
|
regs->gprs[1] = argc;
|
regs->gprs[1] = argc;
|
put_user((unsigned long) argc, --sp);
|
put_user((unsigned long) argc, --sp);
|
current->mm->arg_start = (unsigned long) p;
|
current->mm->arg_start = (unsigned long) p;
|
regs->gprs[2] = (unsigned long) argv;
|
regs->gprs[2] = (unsigned long) argv;
|
while (argc-- > 0) {
|
while (argc-- > 0) {
|
put_user(p, argv++);
|
put_user(p, argv++);
|
while (get_user(p++)) /* nothing */
|
while (get_user(p++)) /* nothing */
|
;
|
;
|
}
|
}
|
put_user(0, argv);
|
put_user(0, argv);
|
current->mm->arg_end = current->mm->env_start = (unsigned long) p;
|
current->mm->arg_end = current->mm->env_start = (unsigned long) p;
|
regs->gprs[3] = (unsigned long) envp;
|
regs->gprs[3] = (unsigned long) envp;
|
while (envc-- > 0) {
|
while (envc-- > 0) {
|
put_user(p, envp++);
|
put_user(p, envp++);
|
while (get_user(p++)) /* nothing */
|
while (get_user(p++)) /* nothing */
|
;
|
;
|
}
|
}
|
put_user(0, envp);
|
put_user(0, envp);
|
current->mm->env_end = (unsigned long) p;
|
current->mm->env_end = (unsigned long) p;
|
return sp;
|
return sp;
|
}
|
}
|
#else
|
#else
|
unsigned long *create_elf_tables(char *p, int argc, int envc, struct pt_regs *regs)
|
unsigned long *create_elf_tables(char *p, int argc, int envc, struct pt_regs *regs)
|
{
|
{
|
unsigned long *argv, *envp;
|
unsigned long *argv, *envp;
|
unsigned long *sp;
|
unsigned long *sp;
|
|
|
/*
|
/*
|
* Force 16 byte alignment here for generality.
|
* Force 16 byte alignment here for generality.
|
*/
|
*/
|
sp = (unsigned long *) (~15UL & (unsigned long) p);
|
sp = (unsigned long *) (~15UL & (unsigned long) p);
|
sp -= 2;
|
sp -= 2;
|
sp -= envc + 1;
|
sp -= envc + 1;
|
envp = sp;
|
envp = sp;
|
sp -= argc + 1;
|
sp -= argc + 1;
|
argv = sp;
|
argv = sp;
|
|
|
regs->gprs[1] = sp;
|
regs->gprs[1] = sp;
|
put_user((unsigned long) argc, --sp);
|
put_user((unsigned long) argc, --sp);
|
current->mm->arg_start = (unsigned long) p;
|
current->mm->arg_start = (unsigned long) p;
|
while (argc-- > 0) {
|
while (argc-- > 0) {
|
put_user(p, argv++);
|
put_user(p, argv++);
|
while (get_user(p++)) /* nothing */
|
while (get_user(p++)) /* nothing */
|
;
|
;
|
}
|
}
|
put_user(0, argv);
|
put_user(0, argv);
|
current->mm->arg_end = current->mm->env_start = (unsigned long) p;
|
current->mm->arg_end = current->mm->env_start = (unsigned long) p;
|
while (envc-- > 0) {
|
while (envc-- > 0) {
|
put_user(p, envp++);
|
put_user(p, envp++);
|
while (get_user(p++)) /* nothing */
|
while (get_user(p++)) /* nothing */
|
;
|
;
|
}
|
}
|
put_user(0, envp);
|
put_user(0, envp);
|
current->mm->env_end = (unsigned long) p;
|
current->mm->env_end = (unsigned long) p;
|
return sp;
|
return sp;
|
}
|
}
|
#endif
|
#endif
|
|
|
static unsigned long putstring(unsigned long p, char * string)
|
static unsigned long putstring(unsigned long p, char * string)
|
{
|
{
|
unsigned long l = strlen(string)+1;
|
unsigned long l = strlen(string)+1;
|
p -= l;
|
p -= l;
|
memcpy((void*)p, string, l);
|
memcpy((void*)p, string, l);
|
return p;
|
return p;
|
}
|
}
|
|
|
static unsigned long putstringarray(unsigned long p, int count, char ** array)
|
static unsigned long putstringarray(unsigned long p, int count, char ** array)
|
{
|
{
|
while(count) {
|
while(count) {
|
p=putstring(p, array[--count]);
|
p=putstring(p, array[--count]);
|
}
|
}
|
return p;
|
return p;
|
}
|
}
|
|
|
static unsigned long stringarraylen(int count, char ** array)
|
static unsigned long stringarraylen(int count, char ** array)
|
{
|
{
|
int l = 4;
|
int l = 4;
|
while(count) {
|
while(count) {
|
l += strlen(array[--count]);
|
l += strlen(array[--count]);
|
l++;
|
l++;
|
l+=4;
|
l+=4;
|
}
|
}
|
return l;
|
return l;
|
}
|
}
|
|
|
int do_relocate(int dst_indx,
|
int do_relocate(int dst_indx,
|
int rel_nb,
|
int rel_nb,
|
struct elf32_rel *rel_ptr,
|
struct elf32_rel *rel_ptr,
|
struct elf32_sym *sym_ptr,
|
struct elf32_sym *sym_ptr,
|
struct sec_add *sec)
|
struct sec_add *sec)
|
{
|
{
|
struct elf32_sym *sym_tab;
|
struct elf32_sym *sym_tab;
|
void *rel_loc;
|
void *rel_loc;
|
unsigned long tmp;
|
unsigned long tmp;
|
int src_indx;
|
int src_indx;
|
int i;
|
int i;
|
|
|
for(i = 0; i < rel_nb; i++, rel_ptr++) {
|
for(i = 0; i < rel_nb; i++, rel_ptr++) {
|
|
|
/* Symbol tab */
|
/* Symbol tab */
|
sym_tab = sym_ptr + (rel_ptr->r_info >> 8);
|
sym_tab = sym_ptr + (rel_ptr->r_info >> 8);
|
/* Section index of section that contains symbol */
|
/* Section index of section that contains symbol */
|
src_indx = sym_tab->st_shndx;
|
src_indx = sym_tab->st_shndx;
|
/* Location in physical memory to which this relocation
|
/* Location in physical memory to which this relocation
|
is refering to */
|
is refering to */
|
rel_loc = (void *)(rel_ptr->r_offset + sec[dst_indx].pm_add);
|
rel_loc = (void *)(rel_ptr->r_offset + sec[dst_indx].pm_add);
|
if((rel_ptr->r_info & 0x000000ff) == R_OR32_32) {
|
if((rel_ptr->r_info & 0x000000ff) == R_OR32_32) {
|
_print("R_OR32_32: rel_loc %.8lx vm_add = %.8lx pm_add = %.8lx val = %.8lx\n", rel_loc, sec[src_indx].vm_add, sec[src_indx].pm_add, sym_tab->st_value);
|
_print("R_OR32_32: rel_loc %.8lx vm_add = %.8lx pm_add = %.8lx val = %.8lx\n", rel_loc, sec[src_indx].vm_add, sec[src_indx].pm_add, sym_tab->st_value);
|
*(unsigned long *)rel_loc = *(unsigned long *)rel_loc
|
*(unsigned long *)rel_loc = *(unsigned long *)rel_loc
|
- sec[src_indx].vm_add
|
- sec[src_indx].vm_add
|
+ sec[src_indx].pm_add
|
+ sec[src_indx].pm_add
|
+ sym_tab->st_value;
|
+ sym_tab->st_value;
|
}
|
}
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_16) {
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_16) {
|
_print("R_OR32_16: rel_loc %.8lx vm_add = %.8lx pm_add = %.8lx\n", rel_loc, sec[src_indx].vm_add, sec[src_indx].pm_add);
|
_print("R_OR32_16: rel_loc %.8lx vm_add = %.8lx pm_add = %.8lx\n", rel_loc, sec[src_indx].vm_add, sec[src_indx].pm_add);
|
*(unsigned short *)rel_loc = *(unsigned short *)rel_loc
|
*(unsigned short *)rel_loc = *(unsigned short *)rel_loc
|
- sec[src_indx].vm_add
|
- sec[src_indx].vm_add
|
+ sec[src_indx].pm_add
|
+ sec[src_indx].pm_add
|
+ sym_tab->st_value;
|
+ sym_tab->st_value;
|
}
|
}
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_8) {
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_8) {
|
_print("R_OR32_8: rel_loc %.8lx vm_add = %.8lx pm_add = %.8lx\n", rel_loc, sec[src_indx].vm_add, sec[src_indx].pm_add);
|
_print("R_OR32_8: rel_loc %.8lx vm_add = %.8lx pm_add = %.8lx\n", rel_loc, sec[src_indx].vm_add, sec[src_indx].pm_add);
|
*(unsigned char *)rel_loc = *(unsigned char *)rel_loc
|
*(unsigned char *)rel_loc = *(unsigned char *)rel_loc
|
- sec[src_indx].vm_add
|
- sec[src_indx].vm_add
|
+ sec[src_indx].pm_add
|
+ sec[src_indx].pm_add
|
+ sym_tab->st_value;
|
+ sym_tab->st_value;
|
}
|
}
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_CONSTH) {
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_CONSTH) {
|
_print("R_OR32_CONSTH: rel_loc %.8lx *rel_loc %.8lx\n", rel_loc, *(((unsigned short *)rel_loc) + 1));
|
_print("R_OR32_CONSTH: rel_loc %.8lx *rel_loc %.8lx\n", rel_loc, *(((unsigned short *)rel_loc) + 1));
|
_print(" vm_add %.8lx pm_add %.8lx\n", sec[src_indx].vm_add, sec[src_indx].pm_add);
|
_print(" vm_add %.8lx pm_add %.8lx\n", sec[src_indx].vm_add, sec[src_indx].pm_add);
|
or32_consth_add = (((unsigned short *)rel_loc) + 1);
|
or32_consth_add = (((unsigned short *)rel_loc) + 1);
|
or32_consth_rel = *or32_consth_add << 16;
|
or32_consth_rel = *or32_consth_add << 16;
|
}
|
}
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_CONST) {
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_CONST) {
|
_print("R_OR32_CONST: rel_loc %.8lx *rel_loc %.8lx\n", rel_loc, *(((unsigned short *)rel_loc) + 1));
|
_print("R_OR32_CONST: rel_loc %.8lx *rel_loc %.8lx\n", rel_loc, *(((unsigned short *)rel_loc) + 1));
|
_print(" vm_add %.8lx pm_add %.8lx\n", sec[src_indx].vm_add, sec[src_indx].pm_add);
|
_print(" vm_add %.8lx pm_add %.8lx\n", sec[src_indx].vm_add, sec[src_indx].pm_add);
|
_print(" consth %.8lx st_value %.8lx\n", or32_consth_rel, sym_tab->st_value);
|
_print(" consth %.8lx st_value %.8lx\n", or32_consth_rel, sym_tab->st_value);
|
|
|
tmp = or32_consth_rel | *(((unsigned short *)rel_loc) + 1);
|
tmp = or32_consth_rel | *(((unsigned short *)rel_loc) + 1);
|
tmp = tmp + sym_tab->st_value - sec[src_indx].vm_add +
|
tmp = tmp + sym_tab->st_value - sec[src_indx].vm_add +
|
sec[src_indx].pm_add;
|
sec[src_indx].pm_add;
|
*(((unsigned short *)rel_loc) + 1) = tmp & 0x0000ffff;
|
*(((unsigned short *)rel_loc) + 1) = tmp & 0x0000ffff;
|
if(or32_consth_add != (unsigned short *)NULL) {
|
if(or32_consth_add != (unsigned short *)NULL) {
|
*or32_consth_add = tmp >> 16;
|
*or32_consth_add = tmp >> 16;
|
or32_consth_add = (unsigned short *)NULL;
|
or32_consth_add = (unsigned short *)NULL;
|
or32_consth_rel = 0;
|
or32_consth_rel = 0;
|
}
|
}
|
}
|
}
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_JUMPTARG) {
|
else if((rel_ptr->r_info & 0x000000ff) == R_OR32_JUMPTARG) {
|
_print("R_OR32_JUMPTARG: rel_loc %.8lx vm_add = %.8lx pm_add = %.8lx\n", rel_loc, sec[src_indx].vm_add, sec[src_indx].pm_add);
|
_print("R_OR32_JUMPTARG: rel_loc %.8lx vm_add = %.8lx pm_add = %.8lx\n", rel_loc, sec[src_indx].vm_add, sec[src_indx].pm_add);
|
_print(" pm_add %.8lx\n", sec[dst_indx].pm_add);
|
_print(" pm_add %.8lx\n", sec[dst_indx].pm_add);
|
tmp = ((*(unsigned long *)rel_loc) & 0x03ffffff);
|
tmp = ((*(unsigned long *)rel_loc) & 0x03ffffff);
|
tmp = (tmp & 0x02000000) ? (tmp | 0xfc000000) : tmp;
|
tmp = (tmp & 0x02000000) ? (tmp | 0xfc000000) : tmp;
|
tmp = tmp + ((sym_tab->st_value -
|
tmp = tmp + ((sym_tab->st_value -
|
sec[src_indx].vm_add +
|
sec[src_indx].vm_add +
|
sec[src_indx].pm_add -
|
sec[src_indx].pm_add -
|
sec[dst_indx].pm_add) >> 2);
|
sec[dst_indx].pm_add) >> 2);
|
*(unsigned long *)rel_loc =
|
*(unsigned long *)rel_loc =
|
((*(unsigned long *)rel_loc) & 0xfc000000) |
|
((*(unsigned long *)rel_loc) & 0xfc000000) |
|
(tmp & 0x03ffffff);
|
(tmp & 0x03ffffff);
|
}
|
}
|
else {
|
else {
|
return -ELNRNG;
|
return -ELNRNG;
|
}
|
}
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
#if JUMP_TO_MAIN
|
#if JUMP_TO_MAIN
|
unsigned long do_find_main(int sym_nb, struct elf32_sym *sym_prt, char *str_ptr)
|
unsigned long do_find_main(int sym_nb, struct elf32_sym *sym_prt, char *str_ptr)
|
{
|
{
|
int i;
|
int i;
|
|
|
for(i = 0; i < sym_nb; i++, sym_prt++) {
|
for(i = 0; i < sym_nb; i++, sym_prt++) {
|
if(sym_prt->st_name == 0)
|
if(sym_prt->st_name == 0)
|
continue;
|
continue;
|
|
|
if(strcmp(&str_ptr[sym_prt->st_name], "_main") == 0)
|
if(strcmp(&str_ptr[sym_prt->st_name], "_main") == 0)
|
return (sym_prt->st_value + sec[sym_prt->st_shndx].pm_add);
|
return (sym_prt->st_value + sec[sym_prt->st_shndx].pm_add);
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
#else
|
#else
|
unsigned long do_find_start(int sym_nb, struct elf32_sym *sym_prt, char *str_ptr)
|
unsigned long do_find_start(int sym_nb, struct elf32_sym *sym_prt, char *str_ptr)
|
{
|
{
|
int i;
|
int i;
|
|
|
for(i = 0; i < sym_nb; i++, sym_prt++) {
|
for(i = 0; i < sym_nb; i++, sym_prt++) {
|
if(sym_prt->st_name == 0)
|
if(sym_prt->st_name == 0)
|
continue;
|
continue;
|
|
|
if(strcmp(&str_ptr[sym_prt->st_name], "_start") == 0)
|
if(strcmp(&str_ptr[sym_prt->st_name], "_start") == 0)
|
return (sym_prt->st_value + sec[sym_prt->st_shndx].pm_add);
|
return (sym_prt->st_value + sec[sym_prt->st_shndx].pm_add);
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
#endif
|
#endif
|
/*
|
/*
|
* These are the functions used to load ELF style executables and shared
|
* These are the functions used to load ELF style executables and shared
|
* libraries. There is no binary dependent code anywhere else.
|
* libraries. There is no binary dependent code anywhere else.
|
*/
|
*/
|
|
|
#define INTERPRETER_NONE 0
|
#define INTERPRETER_NONE 0
|
#define INTERPRETER_AOUT 1
|
#define INTERPRETER_AOUT 1
|
#define INTERPRETER_ELF 2
|
#define INTERPRETER_ELF 2
|
|
|
|
|
static inline int do_load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
|
static inline int do_load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
|
{
|
{
|
struct elfhdr elf_ex;
|
struct elfhdr elf_ex;
|
struct file *file;
|
struct file *file;
|
int i,j;
|
int i,j;
|
int old_fs;
|
int old_fs;
|
struct elf32_shdr *elf_spnt, *elf_shdata;
|
struct elf32_shdr *elf_spnt, *elf_shdata;
|
int elf_exec_fileno;
|
int elf_exec_fileno;
|
unsigned long elf_entry = 0;
|
unsigned long elf_entry = 0;
|
unsigned long code_start, code_end, code_len = 0;
|
unsigned long code_start, code_end, code_len = 0;
|
unsigned long data_start, data_end, data_len = 0;
|
unsigned long data_start, data_end, data_len = 0;
|
unsigned long bss_start, bss_end, bss_len = 0;
|
unsigned long bss_start, bss_end, bss_len = 0;
|
unsigned long stack_len = 0;
|
unsigned long stack_len = 0;
|
int rel_indx, symtab_indx = 0, strtab_indx = 0;
|
int rel_indx, symtab_indx = 0, strtab_indx = 0;
|
struct elf32_rel *rel_ptr;
|
struct elf32_rel *rel_ptr;
|
struct elf32_sym *sym_ptr = (struct elf32_sym *)0;
|
struct elf32_sym *sym_ptr = (struct elf32_sym *)0;
|
char *str_ptr = (char *)0;
|
char *str_ptr = (char *)0;
|
int retval;
|
int retval;
|
|
|
or32_consth_add = 0;
|
or32_consth_add = 0;
|
or32_consth_rel = 0;
|
or32_consth_rel = 0;
|
|
|
current->personality = PER_LINUX;
|
current->personality = PER_LINUX;
|
|
|
elf_exec_fileno = open_inode(bprm->inode, O_RDONLY);
|
elf_exec_fileno = open_inode(bprm->inode, O_RDONLY);
|
|
|
if (elf_exec_fileno < 0)
|
if (elf_exec_fileno < 0)
|
return elf_exec_fileno;
|
return elf_exec_fileno;
|
|
|
file = current->files->fd[elf_exec_fileno];
|
file = current->files->fd[elf_exec_fileno];
|
|
|
|
|
elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
|
elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
|
|
|
/* First of all, some simple consistency checks */
|
/* First of all, some simple consistency checks */
|
if (elf_ex.e_type != ET_REL ||
|
if (elf_ex.e_type != ET_REL ||
|
0 /*!elf_check_arch(elf_ex.e_machine)*/ ||
|
0 /*!elf_check_arch(elf_ex.e_machine)*/ ||
|
!bprm->inode->i_op ||
|
!bprm->inode->i_op ||
|
!bprm->inode->i_op->default_file_ops ||
|
!bprm->inode->i_op->default_file_ops ||
|
!bprm->inode->i_op->default_file_ops->mmap ||
|
!bprm->inode->i_op->default_file_ops->mmap ||
|
elf_ex.e_ident[0] != 0x7f ||
|
elf_ex.e_ident[0] != 0x7f ||
|
strncmp(&elf_ex.e_ident[1], "ELF", 3) != 0) {
|
strncmp(&elf_ex.e_ident[1], "ELF", 3) != 0) {
|
return -ENOEXEC;
|
return -ENOEXEC;
|
}
|
}
|
|
|
if (flush_old_exec(bprm)) {
|
if (flush_old_exec(bprm)) {
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
|
|
if(elf_ex.e_shnum > ELF_SECTION_NB)
|
if(elf_ex.e_shnum > ELF_SECTION_NB)
|
return -ETOOMANYSECT;
|
return -ETOOMANYSECT;
|
|
|
for(i = 0; i < ELF_SECTION_NB; i++)
|
for(i = 0; i < ELF_SECTION_NB; i++)
|
sec[i].len = 0;
|
sec[i].len = 0;
|
|
|
/* Now read in all of the header information */
|
/* Now read in all of the header information */
|
elf_shdata = (struct elf32_shdr *) kmalloc(elf_ex.e_shnum *
|
elf_shdata = (struct elf32_shdr *) kmalloc(elf_ex.e_shnum *
|
elf_ex.e_shentsize, GFP_KERNEL);
|
elf_ex.e_shentsize, GFP_KERNEL);
|
|
|
if (elf_shdata == NULL)
|
if (elf_shdata == NULL)
|
return -ENOMEM;
|
return -ENOMEM;
|
|
|
retval = read_exec(bprm->inode, elf_ex.e_shoff, (char *) elf_shdata,
|
retval = read_exec(bprm->inode, elf_ex.e_shoff, (char *) elf_shdata,
|
elf_ex.e_shentsize * elf_ex.e_shnum, 1);
|
elf_ex.e_shentsize * elf_ex.e_shnum, 1);
|
|
|
if (retval < 0) {
|
if (retval < 0) {
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/* OK, This is the point of no return */
|
/* OK, This is the point of no return */
|
|
|
current->mm->end_data = 0;
|
current->mm->end_data = 0;
|
current->mm->end_code = 0;
|
current->mm->end_code = 0;
|
|
|
/* Now we do a little grungy work by mmaping the ELF image into
|
/* Now we do a little grungy work by mmaping the ELF image into
|
the memory. At this point, we assume that at a variable
|
the memory. At this point, we assume that at a variable
|
address. */
|
address. */
|
|
|
old_fs = get_fs();
|
old_fs = get_fs();
|
set_fs(get_ds());
|
set_fs(get_ds());
|
|
|
/* Calculate the total size of memory needed */
|
/* Calculate the total size of memory needed */
|
for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; i++, elf_spnt++) {
|
for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; i++, elf_spnt++) {
|
if(elf_spnt->sh_type == SHT_PROGBITS) {
|
if(elf_spnt->sh_type == SHT_PROGBITS) {
|
if(elf_spnt->sh_flags & SHF_EXECINSTR)
|
if(elf_spnt->sh_flags & SHF_EXECINSTR)
|
code_len += (elf_spnt->sh_size + 3) & ~(3);
|
code_len += (elf_spnt->sh_size + 3) & ~(3);
|
else if(elf_spnt->sh_flags & SHF_ALLOC)
|
else if(elf_spnt->sh_flags & SHF_ALLOC)
|
data_len += (elf_spnt->sh_size + 3) & ~(3);
|
data_len += (elf_spnt->sh_size + 3) & ~(3);
|
}
|
}
|
else if(elf_spnt->sh_type == SHT_NOBITS) {
|
else if(elf_spnt->sh_type == SHT_NOBITS) {
|
if(elf_spnt->sh_flags & SHF_ALLOC)
|
if(elf_spnt->sh_flags & SHF_ALLOC)
|
bss_len += (elf_spnt->sh_size + 3) & ~(3);
|
bss_len += (elf_spnt->sh_size + 3) & ~(3);
|
}
|
}
|
}
|
}
|
|
|
/* Make room on stack for arguments & environment */
|
/* Make room on stack for arguments & environment */
|
stack_len = STACK_SIZE;
|
stack_len = STACK_SIZE;
|
stack_len += strlen(bprm->filename) + 1;
|
stack_len += strlen(bprm->filename) + 1;
|
stack_len += stringarraylen(bprm->envc, bprm->envp);
|
stack_len += stringarraylen(bprm->envc, bprm->envp);
|
stack_len += stringarraylen(bprm->argc, bprm->argv);
|
stack_len += stringarraylen(bprm->argc, bprm->argv);
|
|
|
/* Allocate space */
|
/* Allocate space */
|
retval = (unsigned long)do_mmap(NULL,
|
retval = (unsigned long)do_mmap(NULL,
|
0,
|
0,
|
code_len + code_len + bss_len + stack_len,
|
code_len + code_len + bss_len + stack_len,
|
PROT_EXEC | PROT_WRITE | PROT_READ,
|
PROT_EXEC | PROT_WRITE | PROT_READ,
|
0,
|
0,
|
0);
|
0);
|
|
|
if(retval > (unsigned long)-4096) {
|
if(retval > (unsigned long)-4096) {
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
code_start = retval;
|
code_start = retval;
|
code_end = code_start;
|
code_end = code_start;
|
data_start = code_start + code_len;
|
data_start = code_start + code_len;
|
data_end = data_start;
|
data_end = data_start;
|
bss_start = data_start + data_len;
|
bss_start = data_start + data_len;
|
bss_end = bss_start;
|
bss_end = bss_start;
|
|
|
current->mm->executable = 0;
|
current->mm->executable = 0;
|
|
|
/* Now copy sections in memory */
|
/* Now copy sections in memory */
|
|
|
for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; i++, elf_spnt++) {
|
for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; i++, elf_spnt++) {
|
|
|
if(elf_spnt->sh_type == SHT_PROGBITS && elf_spnt->sh_flags & SHF_EXECINSTR) {
|
if(elf_spnt->sh_type == SHT_PROGBITS && elf_spnt->sh_flags & SHF_EXECINSTR) {
|
|
|
if(elf_spnt->sh_size == 0)
|
if(elf_spnt->sh_size == 0)
|
continue;
|
continue;
|
|
|
retval = read_exec(bprm->inode, elf_spnt->sh_offset,
|
retval = read_exec(bprm->inode, elf_spnt->sh_offset,
|
(char *)code_end, elf_spnt->sh_size, 1);
|
(char *)code_end, elf_spnt->sh_size, 1);
|
|
|
if (retval < 0) {
|
if (retval < 0) {
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
sec[i].pm_add = code_end;
|
sec[i].pm_add = code_end;
|
sec[i].vm_add = elf_spnt->sh_addr;
|
sec[i].vm_add = elf_spnt->sh_addr;
|
|
|
code_end = code_end + ((elf_spnt->sh_size + 3) & ~(3));
|
code_end = code_end + ((elf_spnt->sh_size + 3) & ~(3));
|
}
|
}
|
else if (elf_spnt->sh_type == SHT_PROGBITS && elf_spnt->sh_flags & SHF_ALLOC) {
|
else if (elf_spnt->sh_type == SHT_PROGBITS && elf_spnt->sh_flags & SHF_ALLOC) {
|
|
|
if(elf_spnt->sh_size == 0)
|
if(elf_spnt->sh_size == 0)
|
continue;
|
continue;
|
|
|
retval = read_exec(bprm->inode, elf_spnt->sh_offset,
|
retval = read_exec(bprm->inode, elf_spnt->sh_offset,
|
(char *)data_end, elf_spnt->sh_size, 1);
|
(char *)data_end, elf_spnt->sh_size, 1);
|
|
|
if (retval < 0) {
|
if (retval < 0) {
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
sec[i].pm_add = data_end;
|
sec[i].pm_add = data_end;
|
sec[i].vm_add = elf_spnt->sh_addr;
|
sec[i].vm_add = elf_spnt->sh_addr;
|
|
|
data_end = data_end + ((elf_spnt->sh_size + 3) & ~(3));
|
data_end = data_end + ((elf_spnt->sh_size + 3) & ~(3));
|
}
|
}
|
else if (elf_spnt->sh_type == SHT_NOBITS && elf_spnt->sh_flags & SHF_ALLOC) {
|
else if (elf_spnt->sh_type == SHT_NOBITS && elf_spnt->sh_flags & SHF_ALLOC) {
|
|
|
if(elf_spnt->sh_size == 0)
|
if(elf_spnt->sh_size == 0)
|
continue;
|
continue;
|
|
|
sec[i].pm_add = bss_end;
|
sec[i].pm_add = bss_end;
|
sec[i].vm_add = elf_spnt->sh_addr;
|
sec[i].vm_add = elf_spnt->sh_addr;
|
|
|
bss_end = bss_end + ((elf_spnt->sh_size + 3) & ~(3));
|
bss_end = bss_end + ((elf_spnt->sh_size + 3) & ~(3));
|
}
|
}
|
}
|
}
|
|
|
/* Set bss and stack to zero */
|
/* Set bss and stack to zero */
|
memset((void*)(bss_start), 0, bss_len + stack_len);
|
memset((void*)(bss_start), 0, bss_len + stack_len);
|
|
|
for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; elf_spnt++, i++) {
|
for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; elf_spnt++, i++) {
|
if(elf_spnt->sh_type == SHT_SYMTAB && (elf_spnt->sh_size != 0)) {
|
if(elf_spnt->sh_type == SHT_SYMTAB && (elf_spnt->sh_size != 0)) {
|
struct elf32_shdr *link_shdr;
|
struct elf32_shdr *link_shdr;
|
int sym_nb;
|
int sym_nb;
|
unsigned long retval;
|
unsigned long retval;
|
|
|
/* Map symtab section */
|
/* Map symtab section */
|
retval = (unsigned long)do_mmap(NULL,
|
retval = (unsigned long)do_mmap(NULL,
|
0,
|
0,
|
elf_spnt->sh_size,
|
elf_spnt->sh_size,
|
PROT_READ,
|
PROT_READ,
|
0,
|
0,
|
0);
|
0);
|
if(retval > (unsigned long)-4096) {
|
if(retval > (unsigned long)-4096) {
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
if(sec[j].len)
|
if(sec[j].len)
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
symtab_indx = i;
|
symtab_indx = i;
|
sec[symtab_indx].pm_add = retval;
|
sec[symtab_indx].pm_add = retval;
|
sym_ptr = (struct elf32_sym *)retval;
|
sym_ptr = (struct elf32_sym *)retval;
|
sec[symtab_indx].len = elf_spnt->sh_size;
|
sec[symtab_indx].len = elf_spnt->sh_size;
|
|
|
retval = read_exec(bprm->inode, elf_spnt->sh_offset,
|
retval = read_exec(bprm->inode, elf_spnt->sh_offset,
|
(char *)retval, elf_spnt->sh_size, 1);
|
(char *)retval, elf_spnt->sh_size, 1);
|
if (retval < 0) {
|
if (retval < 0) {
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
if(sec[j].len)
|
if(sec[j].len)
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
strtab_indx = elf_spnt->sh_link;
|
strtab_indx = elf_spnt->sh_link;
|
link_shdr = elf_shdata + strtab_indx;
|
link_shdr = elf_shdata + strtab_indx;
|
|
|
/* Map strtab section */
|
/* Map strtab section */
|
retval = (unsigned long)do_mmap(NULL,
|
retval = (unsigned long)do_mmap(NULL,
|
0,
|
0,
|
link_shdr->sh_size,
|
link_shdr->sh_size,
|
PROT_READ,
|
PROT_READ,
|
0,
|
0,
|
0);
|
0);
|
if(retval > (unsigned long)-4096) {
|
if(retval > (unsigned long)-4096) {
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
if(sec[j].len)
|
if(sec[j].len)
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
sec[strtab_indx].pm_add = retval;
|
sec[strtab_indx].pm_add = retval;
|
str_ptr = (char *)retval;
|
str_ptr = (char *)retval;
|
sec[strtab_indx].len = link_shdr->sh_size;
|
sec[strtab_indx].len = link_shdr->sh_size;
|
|
|
retval = read_exec(bprm->inode, link_shdr->sh_offset,
|
retval = read_exec(bprm->inode, link_shdr->sh_offset,
|
(char *)retval, link_shdr->sh_size, 1);
|
(char *)retval, link_shdr->sh_size, 1);
|
if (retval < 0) {
|
if (retval < 0) {
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
if(sec[j].len)
|
if(sec[j].len)
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
sym_nb = sec[symtab_indx].len / sizeof(struct elf32_sym);
|
sym_nb = sec[symtab_indx].len / sizeof(struct elf32_sym);
|
#if JUMP_TO_MAIN
|
#if JUMP_TO_MAIN
|
elf_entry = do_find_main(sym_nb, sym_ptr, str_ptr);
|
elf_entry = do_find_main(sym_nb, sym_ptr, str_ptr);
|
#else
|
#else
|
elf_entry = do_find_start(sym_nb, sym_ptr, str_ptr);
|
elf_entry = do_find_start(sym_nb, sym_ptr, str_ptr);
|
#endif
|
#endif
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; elf_spnt++, i++) {
|
for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; elf_spnt++, i++) {
|
if(elf_spnt->sh_type == SHT_REL && (elf_spnt->sh_size != 0)) {
|
if(elf_spnt->sh_type == SHT_REL && (elf_spnt->sh_size != 0)) {
|
struct elf32_shdr *link_shdr;
|
struct elf32_shdr *link_shdr;
|
int rel_nb;
|
int rel_nb;
|
unsigned long retval;
|
unsigned long retval;
|
|
|
/* Map rel section */
|
/* Map rel section */
|
retval = (unsigned long)do_mmap(NULL,
|
retval = (unsigned long)do_mmap(NULL,
|
0,
|
0,
|
elf_spnt->sh_size,
|
elf_spnt->sh_size,
|
PROT_READ,
|
PROT_READ,
|
0,
|
0,
|
0);
|
0);
|
if(retval > (unsigned long)-4096) {
|
if(retval > (unsigned long)-4096) {
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
if(sec[j].len)
|
if(sec[j].len)
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
sec[i].pm_add = retval;
|
sec[i].pm_add = retval;
|
rel_ptr = (struct elf32_rel *)retval;
|
rel_ptr = (struct elf32_rel *)retval;
|
sec[i].len = elf_spnt->sh_size;
|
sec[i].len = elf_spnt->sh_size;
|
|
|
retval = read_exec(bprm->inode, elf_spnt->sh_offset,
|
retval = read_exec(bprm->inode, elf_spnt->sh_offset,
|
(char *)retval, elf_spnt->sh_size, 1);
|
(char *)retval, elf_spnt->sh_size, 1);
|
if (retval < 0) {
|
if (retval < 0) {
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
if(sec[j].len)
|
if(sec[j].len)
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
rel_indx = i;
|
rel_indx = i;
|
link_shdr = elf_shdata + symtab_indx;
|
link_shdr = elf_shdata + symtab_indx;
|
|
|
/* Now do relocations for the n-th section. n is read from
|
/* Now do relocations for the n-th section. n is read from
|
real setiona hader info field. */
|
real setiona hader info field. */
|
|
|
rel_nb = sec[rel_indx].len / sizeof(struct elf32_rel);
|
rel_nb = sec[rel_indx].len / sizeof(struct elf32_rel);
|
retval = do_relocate(elf_spnt->sh_info, rel_nb, rel_ptr, sym_ptr, sec);
|
retval = do_relocate(elf_spnt->sh_info, rel_nb, rel_ptr, sym_ptr, sec);
|
|
|
if (retval < 0) {
|
if (retval < 0) {
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
for(j = 0; j < elf_ex.e_shnum; j++)
|
if(sec[j].len)
|
if(sec[j].len)
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(sec[j].pm_add, sec[j].len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
do_munmap(code_start, code_len + code_len + bss_len + stack_len);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/* Now unmap rel section */
|
/* Now unmap rel section */
|
do_munmap(sec[rel_indx].pm_add, sec[rel_indx].len);
|
do_munmap(sec[rel_indx].pm_add, sec[rel_indx].len);
|
sec[rel_indx].len = 0;
|
sec[rel_indx].len = 0;
|
}
|
}
|
}
|
}
|
|
|
/* Now unmap sym and str sections */
|
/* Now unmap sym and str sections */
|
do_munmap(sec[symtab_indx].pm_add, sec[symtab_indx].len);
|
do_munmap(sec[symtab_indx].pm_add, sec[symtab_indx].len);
|
sec[symtab_indx].len = 0;
|
sec[symtab_indx].len = 0;
|
do_munmap(sec[strtab_indx].pm_add, sec[strtab_indx].len);
|
do_munmap(sec[strtab_indx].pm_add, sec[strtab_indx].len);
|
sec[strtab_indx].len = 0;
|
sec[strtab_indx].len = 0;
|
|
|
set_fs(old_fs);
|
set_fs(old_fs);
|
kfree(elf_shdata);
|
kfree(elf_shdata);
|
|
|
if (current->exec_domain && current->exec_domain->use_count)
|
if (current->exec_domain && current->exec_domain->use_count)
|
(*current->exec_domain->use_count)--;
|
(*current->exec_domain->use_count)--;
|
if (current->binfmt && current->binfmt->use_count)
|
if (current->binfmt && current->binfmt->use_count)
|
(*current->binfmt->use_count)--;
|
(*current->binfmt->use_count)--;
|
current->exec_domain = lookup_exec_domain(current->personality);
|
current->exec_domain = lookup_exec_domain(current->personality);
|
current->binfmt = &elf_format;
|
current->binfmt = &elf_format;
|
if (current->exec_domain && current->exec_domain->use_count)
|
if (current->exec_domain && current->exec_domain->use_count)
|
(*current->exec_domain->use_count)++;
|
(*current->exec_domain->use_count)++;
|
if (current->binfmt && current->binfmt->use_count)
|
if (current->binfmt && current->binfmt->use_count)
|
(*current->binfmt->use_count)++;
|
(*current->binfmt->use_count)++;
|
|
|
bprm->p = bss_end + stack_len - 4;
|
bprm->p = bss_end + stack_len - 4;
|
|
|
bprm->p = putstringarray(bprm->p, 1, &bprm->filename);
|
bprm->p = putstringarray(bprm->p, 1, &bprm->filename);
|
|
|
bprm->p = putstringarray(bprm->p, bprm->envc, bprm->envp);
|
bprm->p = putstringarray(bprm->p, bprm->envc, bprm->envp);
|
|
|
bprm->p = putstringarray(bprm->p, bprm->argc, bprm->argv);
|
bprm->p = putstringarray(bprm->p, bprm->argc, bprm->argv);
|
|
|
current->suid = current->euid = current->fsuid = bprm->e_uid;
|
current->suid = current->euid = current->fsuid = bprm->e_uid;
|
current->sgid = current->egid = current->fsgid = bprm->e_gid;
|
current->sgid = current->egid = current->fsgid = bprm->e_gid;
|
current->flags &= ~PF_FORKNOEXEC;
|
current->flags &= ~PF_FORKNOEXEC;
|
bprm->p = (unsigned long)create_elf_tables((char *) bprm->p, bprm->argc, bprm->envc, regs);
|
bprm->p = (unsigned long)create_elf_tables((char *) bprm->p, bprm->argc, bprm->envc, regs);
|
|
|
current->mm->brk = bss_end;
|
current->mm->brk = bss_end;
|
current->mm->start_code = code_start;
|
current->mm->start_code = code_start;
|
current->mm->end_code = code_end;
|
current->mm->end_code = code_end;
|
current->mm->start_data = data_start;
|
current->mm->start_data = data_start;
|
current->mm->end_data = data_end;
|
current->mm->end_data = data_end;
|
current->mm->start_stack = bprm->p;
|
current->mm->start_stack = bprm->p;
|
|
|
_print("%s - %s:%d\n",__FILE__,__FUNCTION__,__LINE__);
|
_print("%s - %s:%d\n",__FILE__,__FUNCTION__,__LINE__);
|
_print(" start_code = %x\n", current->mm->start_code);
|
_print(" start_code = %x\n", current->mm->start_code);
|
_print(" end_code = %x\n", current->mm->end_code);
|
_print(" end_code = %x\n", current->mm->end_code);
|
_print(" start_data = %x\n", current->mm->start_data);
|
_print(" start_data = %x\n", current->mm->start_data);
|
_print(" end_data = %x\n", current->mm->end_data);
|
_print(" end_data = %x\n", current->mm->end_data);
|
_print(" start_brk = %x\n", current->mm->start_brk);
|
_print(" start_brk = %x\n", current->mm->start_brk);
|
_print(" brk = %x\n", current->mm->brk);
|
_print(" brk = %x\n", current->mm->brk);
|
_print(" start_stack = %x\n", current->mm->start_stack);
|
_print(" start_stack = %x\n", current->mm->start_stack);
|
_print(" arg_start = %x\n", current->mm->arg_start);
|
_print(" arg_start = %x\n", current->mm->arg_start);
|
_print(" env_start = %x\n", current->mm->env_start);
|
_print(" env_start = %x\n", current->mm->env_start);
|
_print(" env_end = %x\n", current->mm->env_end);
|
_print(" env_end = %x\n", current->mm->env_end);
|
_print(" elf_entry = %x\n", elf_entry);
|
_print(" elf_entry = %x\n", elf_entry);
|
|
|
start_thread(regs, elf_entry, bprm->p);
|
start_thread(regs, elf_entry, bprm->p);
|
|
|
if (current->flags & PF_PTRACED)
|
if (current->flags & PF_PTRACED)
|
send_sig(SIGTRAP, current, 0);
|
send_sig(SIGTRAP, current, 0);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
|
static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
|
{
|
{
|
int retval;
|
int retval;
|
|
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
retval = do_load_elf_binary(bprm, regs);
|
retval = do_load_elf_binary(bprm, regs);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return retval;
|
return retval;
|
}
|
}
|
|
|
int init_elf_binfmt(void)
|
int init_elf_binfmt(void)
|
{
|
{
|
return register_binfmt(&elf_format);
|
return register_binfmt(&elf_format);
|
}
|
}
|
|
|
#ifdef MODULE
|
#ifdef MODULE
|
|
|
int init_module(void)
|
int init_module(void)
|
{
|
{
|
/* Install the COFF, ELF and XOUT loaders.
|
/* Install the COFF, ELF and XOUT loaders.
|
* N.B. We *rely* on the table being the right size with the
|
* N.B. We *rely* on the table being the right size with the
|
* right number of free slots...
|
* right number of free slots...
|
*/
|
*/
|
return init_elf_binfmt();
|
return init_elf_binfmt();
|
}
|
}
|
|
|
|
|
void cleanup_module(void)
|
void cleanup_module(void)
|
{
|
{
|
/* Remove the COFF and ELF loaders. */
|
/* Remove the COFF and ELF loaders. */
|
unregister_binfmt(&elf_format);
|
unregister_binfmt(&elf_format);
|
}
|
}
|
|
|
#endif
|
#endif
|
|
|
