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Fix a segfault in uclibc ldso.

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SVN-Revision: 12698
This commit is contained in:
Lars-Peter Clausen 2008-09-25 13:06:43 +00:00
parent c1ef612776
commit 387da72d9c
1 changed files with 30 additions and 0 deletions
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30
toolchain/uClibc/patches/150-fix-ldso-text-realloc-segfault.patch Normal file
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@ -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