Darwin : Make trampoline templates linker-visible.

For aarch64, the alignment of the LTRAMPn symbols matters.

Actually, the LTRAMPn  symbols _are_ 8 byte aligned, but because
they are Local, the linker doesn't know that this guarantee can be met.
It assumes that they are not necessarily more aligned than the
containing section (ld64 atoms strike again).

The fix is to publish the trampoline symbol for the linker to access
directly - it can then see that the atom is suitably aligned.

Fixes issue #11 on the development branch.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
gcc/ChangeLog:

	* config/darwin.h (ASM_GENERATE_INTERNAL_LABEL): Add LTRAMP
	to the list of symbol prefixes that must be made linker-
	visible.

diff --git a/gcc/config/darwin.h b/gcc/config/darwin.h
index 27cb3e4bb3042757b9f6266fda51706163244f3d..e54cbb11cee6ab05900587268c7b91a66ad33f59 100644 (file)
--- a/gcc/config/darwin.h
+++ b/gcc/config/darwin.h
@@ -921,6 +921,8 @@ extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
       sprintf (LABEL, "*%s%ld", "lubsan_type", (long)(NUM));\
     else if (strcmp ("LASAN", PREFIX) == 0)    \
       sprintf (LABEL, "*%s%ld", "lASAN", (long)(NUM));\
+    else if (strcmp ("LTRAMP", PREFIX) == 0)   \
+      sprintf (LABEL, "*%s%ld", "lTRAMP", (long)(NUM));\
     else                                               \
       sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM));  \
   } while (0)