Hi all,
The attached patch fixes a problem you get if you build dynamic binaries
for a 32-bit powerpc target on a 64-bit powerpc host.
At the time I did this port I didn't fully understand all the scenarios
you might run into.
The issue is this, on all FreeBSD archs the interpreter is ld-elf.so.1.
On powerpc64 we have also an ld-elf32.so.1 for 32-bit binaries. In case
we run a 32-bit binary on a 64-bit host the RTLD reroutes the call to
this ld-elf32.so.1.
Up to now this rerouting didn't happen since gcc used the ld-elf32.so.1
instead. The binary runs fine on the 64-bit host since the RTLD finds a
ld-elf32.so.1.
But now when I take this binary to a 32-bit host I can't run it since
the RTLD does not find the ld-elf32.so.1.
The patch fixes this and simplifies the LINK_OS_FREEBSD_SPEC_DEF for
FreeBSD powerpc64.
If there are no major objections I'm going to apply this patch to trunk,
gcc-5 and gcc-49 branch in the next days. It is FreeBSD powerpc64 only
and it is a bug.
Thanks,
Andreas
2015-12-22 Andreas Tobler <andre...@gcc.gnu.org>
* config/rs6000/freebsd64.h: Delete FREEBSD_DYNAMIC_LINKER32/64
defines. Use FBSD_DYNAMIC_LINKER instead.
Rename and simplify LINK_OS_FREEBSD_SPEC_DEF32/64 to
LINK_OS_FREEBSD_SPEC_DEF.
Index: freebsd64.h
===================================================================
--- freebsd64.h (revision 231662)
+++ freebsd64.h (working copy)
@@ -167,10 +167,7 @@
{ "link_os_freebsd_spec32", LINK_OS_FREEBSD_SPEC32 }, \
{ "link_os_freebsd_spec64", LINK_OS_FREEBSD_SPEC64 },
-#define FREEBSD_DYNAMIC_LINKER32 "/libexec/ld-elf32.so.1"
-#define FREEBSD_DYNAMIC_LINKER64 "/libexec/ld-elf.so.1"
-
-#define LINK_OS_FREEBSD_SPEC_DEF32 "\
+#define LINK_OS_FREEBSD_SPEC_DEF "\
%{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \
%{v:-V} \
%{assert*} %{R*} %{rpath*} %{defsym*} \
@@ -178,25 +175,13 @@
%{!shared: \
%{!static: \
%{rdynamic: -export-dynamic} \
- %{!dynamic-linker:-dynamic-linker " FREEBSD_DYNAMIC_LINKER32 "}} \
+ %{!dynamic-linker:-dynamic-linker " FBSD_DYNAMIC_LINKER "}} \
%{static:-Bstatic}} \
%{symbolic:-Bsymbolic}"
-#define LINK_OS_FREEBSD_SPEC_DEF64 "\
- %{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \
- %{v:-V} \
- %{assert*} %{R*} %{rpath*} %{defsym*} \
- %{shared:-Bshareable %{h*} %{soname*}} \
- %{!shared: \
- %{!static: \
- %{rdynamic: -export-dynamic} \
- %{!dynamic-linker:-dynamic-linker " FREEBSD_DYNAMIC_LINKER64 "}} \
- %{static:-Bstatic}} \
- %{symbolic:-Bsymbolic}"
-
-#define LINK_OS_FREEBSD_SPEC32 "-melf32ppc_fbsd " LINK_OS_FREEBSD_SPEC_DEF32
+#define LINK_OS_FREEBSD_SPEC32 "-melf32ppc_fbsd " LINK_OS_FREEBSD_SPEC_DEF
-#define LINK_OS_FREEBSD_SPEC64 "-melf64ppc_fbsd " LINK_OS_FREEBSD_SPEC_DEF64
+#define LINK_OS_FREEBSD_SPEC64 "-melf64ppc_fbsd " LINK_OS_FREEBSD_SPEC_DEF
#undef MULTILIB_DEFAULTS
#define MULTILIB_DEFAULTS { "m64" }
