Fix a segfault in uclibc ldso.

SVN-Revision: 12698

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

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