On Thu, 2 Aug 2012 14:39:54 -0700 Steve Kargl <s...@troutmask.apl.washington.edu> wrote:
> % file /usr/local/bin/ppdpo > /usr/local/bin/ppdpo: ELF 32-bit LSB shared object, Intel 80386, \ > version 1 (FreeBSD), dynamically linked (uses shared libs), > FreeBSD-style,\ for FreeBSD 10.0 (1000015), stripped > > % ldd /usr/local/bin/ppdpo > /usr/local/bin/ppdpo: > /usr/local/bin/ppdpo: signal 11 > It is weird that program tries to dlopen what appears to be the binary (itself?), but that did uncover the issue. Please try attached patch, I only very lightly tested it here. Also available here: http://people.freebsd.org/~kan/rtld-digest-notes.diff -- Alexander Kabaev
diff --git a/libexec/rtld-elf/map_object.c b/libexec/rtld-elf/map_object.c
index 509a64f..350d437 100644
--- a/libexec/rtld-elf/map_object.c
+++ b/libexec/rtld-elf/map_object.c
@@ -153,7 +153,6 @@ map_object(int fd, const char *path, const struct stat *sb)
break;
note_start = (Elf_Addr)(char *)hdr + phdr->p_offset;
note_end = note_start + phdr->p_filesz;
- digest_notes(obj, note_start, note_end);
break;
}
@@ -292,6 +291,11 @@ map_object(int fd, const char *path, const struct stat *sb)
obj->relro_page = obj->relocbase + trunc_page(relro_page);
obj->relro_size = round_page(relro_size);
+ if (note_start < note_end)
+ {
+ digest_notes(obj, note_start, note_end);
+ }
+
munmap(hdr, PAGE_SIZE);
return (obj);
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