| Line 35... |
Line 35... |
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#define DLINFO_ITEMS 12
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#define DLINFO_ITEMS 12
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#include <linux/elf.h>
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#include <linux/elf.h>
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#define STACK_SIZE (1*PAGE_SIZE)
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#define JUMP_TO_MAIN 0
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#define STACK_SIZE (2*PAGE_SIZE)
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static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs);
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static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs);
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#define ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(ELF_EXEC_PAGESIZE-1))
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#define ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(ELF_EXEC_PAGESIZE-1))
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#define ELF_PAGEOFFSET(_v) ((_v) & (ELF_EXEC_PAGESIZE-1))
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#define ELF_PAGEOFFSET(_v) ((_v) & (ELF_EXEC_PAGESIZE-1))
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| Line 60... |
Line 61... |
} sec[ELF_SECTION_NB];
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} sec[ELF_SECTION_NB];
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unsigned short *or32_consth_add = (unsigned short *)NULL;
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unsigned short *or32_consth_add = (unsigned short *)NULL;
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unsigned long or32_consth_rel;
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unsigned long or32_consth_rel;
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#if JUMP_TO_MAIN
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unsigned long *create_elf_tables(char *p, int argc, int envc, struct pt_regs *regs)
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unsigned long *create_elf_tables(char *p, int argc, int envc, struct pt_regs *regs)
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{
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{
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unsigned long *argv, *envp;
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unsigned long *argv, *envp;
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unsigned long *sp;
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unsigned long *sp;
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| Line 96... |
Line 98... |
}
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}
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put_user(0, envp);
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put_user(0, envp);
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current->mm->env_end = (unsigned long) p;
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current->mm->env_end = (unsigned long) p;
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return sp;
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return sp;
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}
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}
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#else
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unsigned long *create_elf_tables(char *p, int argc, int envc, struct pt_regs *regs)
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{
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unsigned long *argv, *envp;
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unsigned long *sp;
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/*
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* Force 16 byte alignment here for generality.
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*/
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sp = (unsigned long *) (~15UL & (unsigned long) p);
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sp -= 2;
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sp -= envc + 1;
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envp = sp;
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sp -= argc + 1;
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argv = sp;
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regs->gprs[1] = sp;
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put_user((unsigned long) argc, --sp);
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current->mm->arg_start = (unsigned long) p;
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while (argc-- > 0) {
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put_user(p, argv++);
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while (get_user(p++)) /* nothing */
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;
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}
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put_user(0, argv);
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current->mm->arg_end = current->mm->env_start = (unsigned long) p;
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while (envc-- > 0) {
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put_user(p, envp++);
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while (get_user(p++)) /* nothing */
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;
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}
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put_user(0, envp);
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current->mm->env_end = (unsigned long) p;
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return sp;
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}
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#endif
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static unsigned long putstring(unsigned long p, char * string)
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static unsigned long putstring(unsigned long p, char * string)
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{
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{
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unsigned long l = strlen(string)+1;
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unsigned long l = strlen(string)+1;
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p -= l;
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p -= l;
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| Line 145... |
Line 183... |
/* Section index of section that contains symbol */
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/* Section index of section that contains symbol */
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src_indx = sym_tab->st_shndx;
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src_indx = sym_tab->st_shndx;
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/* Location in physical memory to which this relocation
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/* Location in physical memory to which this relocation
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is refering to */
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is refering to */
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rel_loc = (void *)(rel_ptr->r_offset + sec[dst_indx].pm_add);
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rel_loc = (void *)(rel_ptr->r_offset + sec[dst_indx].pm_add);
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if((rel_ptr->r_info & 0x000000ff) == R_OR32_32) {
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if((rel_ptr->r_info & 0x000000ff) == R_OR32_32) {
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*(unsigned long *)rel_loc = *(unsigned long *)rel_loc
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*(unsigned long *)rel_loc = *(unsigned long *)rel_loc
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- sec[src_indx].vm_add
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- sec[src_indx].vm_add
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+ sec[src_indx].pm_add;
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+ sec[src_indx].pm_add;
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}
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}
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| Line 194... |
Line 231... |
}
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}
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}
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}
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return 0;
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return 0;
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}
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}
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#if JUMP_TO_MAIN
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unsigned long do_find_main(int sym_nb, struct elf32_sym *sym_prt, char *str_ptr)
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unsigned long do_find_main(int sym_nb, struct elf32_sym *sym_prt, char *str_ptr)
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{
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{
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int i;
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int i;
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for(i = 0; i < sym_nb; i++, sym_prt++) {
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for(i = 0; i < sym_nb; i++, sym_prt++) {
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| Line 207... |
Line 245... |
if(strcmp(&str_ptr[sym_prt->st_name], "_main") == 0)
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if(strcmp(&str_ptr[sym_prt->st_name], "_main") == 0)
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return (sym_prt->st_value + sec[sym_prt->st_shndx].pm_add);
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return (sym_prt->st_value + sec[sym_prt->st_shndx].pm_add);
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}
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}
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return 0;
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return 0;
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}
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}
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#else
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unsigned long do_find_start(int sym_nb, struct elf32_sym *sym_prt, char *str_ptr)
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{
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int i;
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for(i = 0; i < sym_nb; i++, sym_prt++) {
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if(sym_prt->st_name == 0)
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continue;
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if(strcmp(&str_ptr[sym_prt->st_name], "_start") == 0)
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return (sym_prt->st_value + sec[sym_prt->st_shndx].pm_add);
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}
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return 0;
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}
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#endif
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/*
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/*
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* These are the functions used to load ELF style executables and shared
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* These are the functions used to load ELF style executables and shared
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* libraries. There is no binary dependent code anywhere else.
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* libraries. There is no binary dependent code anywhere else.
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*/
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*/
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| Line 313... |
Line 366... |
if(elf_spnt->sh_flags & SHF_ALLOC)
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if(elf_spnt->sh_flags & SHF_ALLOC)
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bss_len += (elf_spnt->sh_size + 3) & ~(3);
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bss_len += (elf_spnt->sh_size + 3) & ~(3);
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}
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}
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}
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}
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/* Make room on stack for arguments & environment */
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stack_len = STACK_SIZE;
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stack_len += strlen(bprm->filename) + 1;
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stack_len += stringarraylen(bprm->envc, bprm->envp);
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stack_len += stringarraylen(bprm->argc, bprm->argv);
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/* Allocate space */
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/* Allocate space */
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retval = (unsigned long)do_mmap(NULL,
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retval = (unsigned long)do_mmap(NULL,
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0,
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0,
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code_len + code_len + bss_len + stack_len,
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code_len + code_len + bss_len + stack_len,
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PROT_EXEC | PROT_WRITE | PROT_READ,
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PROT_EXEC | PROT_WRITE | PROT_READ,
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| Line 332... |
Line 391... |
code_end = code_start;
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code_end = code_start;
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data_start = code_start + code_len;
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data_start = code_start + code_len;
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data_end = data_start;
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data_end = data_start;
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bss_start = data_start + data_len;
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bss_start = data_start + data_len;
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bss_end = bss_start;
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bss_end = bss_start;
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stack_len = STACK_SIZE;
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/* Make room on stack for arguments & environment */
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stack_len += strlen(bprm->filename) + 1;
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stack_len += stringarraylen(bprm->envc, bprm->envp);
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stack_len += stringarraylen(bprm->argc, bprm->argv);
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current->mm->executable = 0;
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current->mm->executable = 0;
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/* Now copy sections in memory */
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/* Now copy sections in memory */
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for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; i++, elf_spnt++) {
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for(i = 0, elf_spnt = elf_shdata; i < elf_ex.e_shnum; i++, elf_spnt++) {
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if(elf_spnt->sh_type == SHT_PROGBITS && elf_spnt->sh_flags & SHF_EXECINSTR) {
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if(elf_spnt->sh_type == SHT_PROGBITS && elf_spnt->sh_flags & SHF_EXECINSTR) {
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if(elf_spnt->sh_size == 0)
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continue;
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retval = read_exec(bprm->inode, elf_spnt->sh_offset,
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retval = read_exec(bprm->inode, elf_spnt->sh_offset,
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(char *)code_end, elf_spnt->sh_size, 1);
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(char *)code_end, elf_spnt->sh_size, 1);
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if (retval < 0) {
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if (retval < 0) {
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do_munmap(code_start, code_len + code_len + bss_len + stack_len);
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do_munmap(code_start, code_len + code_len + bss_len + stack_len);
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| Line 363... |
Line 419... |
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code_end = code_end + ((elf_spnt->sh_size + 3) & ~(3));
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code_end = code_end + ((elf_spnt->sh_size + 3) & ~(3));
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}
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}
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else if (elf_spnt->sh_type == SHT_PROGBITS && elf_spnt->sh_flags & SHF_ALLOC) {
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else if (elf_spnt->sh_type == SHT_PROGBITS && elf_spnt->sh_flags & SHF_ALLOC) {
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if(elf_spnt->sh_size == 0)
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continue;
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retval = read_exec(bprm->inode, elf_spnt->sh_offset,
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retval = read_exec(bprm->inode, elf_spnt->sh_offset,
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(char *)data_end, elf_spnt->sh_size, 1);
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(char *)data_end, elf_spnt->sh_size, 1);
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if (retval < 0) {
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if (retval < 0) {
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do_munmap(code_start, code_len + code_len + bss_len + stack_len);
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do_munmap(code_start, code_len + code_len + bss_len + stack_len);
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| Line 379... |
Line 438... |
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data_end = data_end + ((elf_spnt->sh_size + 3) & ~(3));
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data_end = data_end + ((elf_spnt->sh_size + 3) & ~(3));
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}
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}
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else if (elf_spnt->sh_type == SHT_NOBITS && elf_spnt->sh_flags & SHF_ALLOC) {
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else if (elf_spnt->sh_type == SHT_NOBITS && elf_spnt->sh_flags & SHF_ALLOC) {
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|
|
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if(elf_spnt->sh_size == 0)
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continue;
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sec[i].pm_add = bss_end;
|
sec[i].pm_add = bss_end;
|
sec[i].vm_add = elf_spnt->sh_addr;
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sec[i].vm_add = elf_spnt->sh_addr;
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|
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bss_end = bss_end + ((elf_spnt->sh_size + 3) & ~(3));
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bss_end = bss_end + ((elf_spnt->sh_size + 3) & ~(3));
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}
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}
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| Line 462... |
Line 524... |
kfree(elf_shdata);
|
kfree(elf_shdata);
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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
|
elf_entry = do_find_main(sym_nb, sym_ptr, str_ptr);
|
elf_entry = do_find_main(sym_nb, sym_ptr, str_ptr);
|
|
#else
|
|
elf_entry = do_find_start(sym_nb, sym_ptr, str_ptr);
|
|
#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++) {
|
