Thanks, this commits helps narrow down the issue. The 73fc4e28b9464f0e refactor did not
add the GL(dl_phdr) and GL(dl_phnum) for static case, relying on the __ehdr_start symbol
to get the correct values.
The issue is for some archs, alpha for instance, the hidden weak reference is not making
the static linker to define the __ehdr_start address correctly: it is being set to 0 and
thus GL(dl_phdr) and GL(dl_phnum) are set to invalid values.
And I am not sure if the hidden weak __ehdr_start does work on all architectures, so I
think it would be safer to just restore the previous behavior to setup GL(dl_phdr) and
GL(dl_phnum) for static and we can simplify __ehdr_start fallback case to not use
a weak ref (as for PIE). I am checking if the following patch trigger any regression,
at least for alpha it fixes the static failures:
diff --git a/csu/libc-start.c b/csu/libc-start.c
index 543560f36c..63a3eceaea 100644
--- a/csu/libc-start.c
+++ b/csu/libc-start.c
@@ -271,18 +271,10 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
So we can set up _dl_phdr and _dl_phnum even without any
information from auxv. */
- extern const ElfW(Ehdr) __ehdr_start
-# if BUILD_PIE_DEFAULT
- __attribute__ ((visibility ("hidden")));
-# else
- __attribute__ ((weak, visibility ("hidden")));
- if (&__ehdr_start != NULL)
-# endif
- {
- assert (__ehdr_start.e_phentsize == sizeof *GL(dl_phdr));
- GL(dl_phdr) = (const void *) &__ehdr_start + __ehdr_start.e_phoff;
- GL(dl_phnum) = __ehdr_start.e_phnum;
- }
+ extern const ElfW(Ehdr) __ehdr_start attribute_hidden;
+ assert (__ehdr_start.e_phentsize == sizeof *GL(dl_phdr));
+ GL(dl_phdr) = (const void *) &__ehdr_start + __ehdr_start.e_phoff;
+ GL(dl_phnum) = __ehdr_start.e_phnum;
}
__tunables_init (__environ);
diff --git a/sysdeps/unix/sysv/linux/dl-parse_auxv.h b/sysdeps/unix/sysv/linux/dl-parse_auxv.h
index bf9374371e..5913c9d6e5 100644
--- a/sysdeps/unix/sysv/linux/dl-parse_auxv.h
+++ b/sysdeps/unix/sysv/linux/dl-parse_auxv.h
@@ -56,6 +56,10 @@ void _dl_parse_auxv (ElfW(auxv_t) *av, dl_parse_auxv_t auxv_values)
if (GLRO(dl_sysinfo_dso) != NULL)
GLRO(dl_sysinfo) = auxv_values[AT_SYSINFO];
#endif
+#ifndef SHARED
+ GL(dl_phdr) = (void*) auxv_values[AT_PHDR];
+ GL(dl_phnum) = auxv_values[AT_PHENT];
+#endif
DL_PLATFORM_AUXV
}