+2012-05-02 Steven Bosscher <steven@gcc.gnu.org>
+
+ * config/alpha/vms.h (SUBTARGET_OVERRIDE_OPTIONS): For pic code,
+ unset flag_jump_tables.
+ * stmt.c (expand_case): Remove special flag_pic case conditional
+ on ASM_OUTPUT_ADDR_DIFF_ELT not being defined.
+
2012-05-02 Ulrich Weigand <ulrich.weigand@linaro.org>
* common/config/s390/s390-common.c (s390_option_optimization_table):
#undef ASM_FINAL_SPEC
/* The VMS convention is to always provide minimal debug info
- for a traceback unless specifically overridden. */
+ for a traceback unless specifically overridden.
+
+ Because ASM_OUTPUT_ADDR_DIFF_ELT is not defined for alpha-vms,
+ jump tables cannot be output for PIC code, because you can't put
+ an absolute address in a readonly section. Putting the table in
+ a writable section is a security hole. Therefore, we unset the
+ flag_jump_tables flag, forcing switch statements to be expanded
+ using decision trees. There are probably other ways to address
+ this issue, but using a decision tree is clearly safe. */
#undef SUBTARGET_OVERRIDE_OPTIONS
#define SUBTARGET_OVERRIDE_OPTIONS \
write_symbols = VMS_DEBUG; \
debug_info_level = DINFO_LEVEL_TERSE; \
} \
+ if (flag_pic) \
+ flag_jump_tables = 0; \
} while (0)
#undef LINK_SPEC
/* RANGE may be signed, and really large ranges will show up
as negative numbers. */
|| compare_tree_int (range, 0) < 0
-#ifndef ASM_OUTPUT_ADDR_DIFF_ELT
- || flag_pic
-#endif
|| !flag_jump_tables
|| TREE_CONSTANT (index_expr)
/* If neither casesi or tablejump is available, we can