toolchain/uClibc/patches/150-fix-ldso-text-realloc-segfault.patch

   1 diff -urN uClibc-0.9.29.old/ldso/ldso/ldso.c uClibc-0.9.29/ldso/ldso/ldso.c
   2 --- uClibc-0.9.29.old/ldso/ldso/ldso.c  2008-09-25 01:02:42.000000000 +0200
   3 +++ uClibc-0.9.29/ldso/ldso/ldso.c      2008-09-24 23:55:11.000000000 +0200
   4 @@ -286,15 +286,20 @@
   5                         _dl_debug_early("calling mprotect on the application program\n");
   6                         /* Now cover the application program. */
   7                         if (app_tpnt->dynamic_info[DT_TEXTREL]) {
   8 -                               ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
   9 -                               for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
  10 -                                       if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W))
  11 -                                               _dl_mprotect((void *) (DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr) & PAGE_ALIGN),
  12 -                                                            ((ppnt->p_vaddr + app_tpnt->loadaddr) & ADDR_ALIGN) +
  13 -                                                            (unsigned long) ppnt->p_filesz,
  14 +                               ElfW(Phdr) *ppnt_inner = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
  15 +                               for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt_inner++) {
  16 +                                       if (ppnt_inner->p_type == PT_LOAD && !(ppnt_inner->p_flags & PF_W))
  17 +                                               _dl_mprotect((void *) (DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt_inner->p_vaddr) & PAGE_ALIGN),
  18 +                                                            ((ppnt_inner->p_vaddr + app_tpnt->loadaddr) & ADDR_ALIGN) +
  19 +                                                            (unsigned long) ppnt_inner->p_filesz,
  20                                                              PROT_READ | PROT_WRITE | PROT_EXEC);
  21                                 }
  22                         }
  23 +#else
  24 +                       if (app_tpnt->dynamic_info[DT_TEXTREL]) {
  25 +                               _dl_dprintf(_dl_debug_file, "Can't modify application's text section; use the GCC option -fPIE for position-independent executables.\n");
  26 +                               _dl_exit(1);
  27 +}
  28  #endif
  29
  30  #ifndef ALLOW_ZERO_PLTGOT