From 8da092e746bd130c88c5c4e754ed98e3a7b26e0e Mon Sep 17 00:00:00 2001
From: lars <lars@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Thu, 25 Sep 2008 13:06:43 +0000
Subject: [PATCH] Fix a segfault in uclibc ldso.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12698 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
.../150-fix-ldso-text-realloc-segfault.patch | 30 +++++++++++++++++++
1 file changed, 30 insertions(+)
create mode 100644 toolchain/uClibc/patches/150-fix-ldso-text-realloc-segfault.patch
diff --git a/toolchain/uClibc/patches/150-fix-ldso-text-realloc-segfault.patch b/toolchain/uClibc/patches/150-fix-ldso-text-realloc-segfault.patch
new file mode 100644
index 000000000..ce5fb3046
--- /dev/null
+++ b/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
--
2.20.1