Below are the port changes to enable building ASAN on powerpc*-linux.
The libsanitizer changes required for powerpc*-linux have already been
committed. This passes bootstrap and regtesting with no regressions
and we also pass the two ASAN test suite test cases.
Ok for mainline?
Peter
libsanitizer/
* configure.tgt: Enable build on powerpc*-linux.
gcc/
* config/rs6000/rs6000.c (TARGET_ASAN_SHADOW_OFFSET): Define.
(rs6000_asan_shadow_offset): New function.
* config/rs6000/rs6000.h (FRAME_GROWS_DOWNWARD): Define to
flag_stack_protect != 0 || flag_asan != 0.
Index: libsanitizer/configure.tgt
===================================================================
--- libsanitizer/configure.tgt (revision 194226)
+++ libsanitizer/configure.tgt (working copy)
@@ -25,6 +25,8 @@ case "${target}" in
TSAN_SUPPORTED=yes
fi
;;
+ powerpc*-*-linux*)
+ ;;
sparc*-*-linux*)
;;
x86_64-*-darwin* | i?86-*-darwin*)
Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c (revision 194226)
+++ gcc/config/rs6000/rs6000.c (working copy)
@@ -1187,6 +1187,9 @@ static const struct attribute_spec rs600
#undef TARGET_DELEGITIMIZE_ADDRESS
#define TARGET_DELEGITIMIZE_ADDRESS rs6000_delegitimize_address
+#undef TARGET_ASAN_SHADOW_OFFSET
+#define TARGET_ASAN_SHADOW_OFFSET rs6000_asan_shadow_offset
+
#undef TARGET_CONST_NOT_OK_FOR_DEBUG_P
#define TARGET_CONST_NOT_OK_FOR_DEBUG_P rs6000_const_not_ok_for_debug_p
@@ -27521,6 +27524,13 @@ rs6000_final_prescan_insn (rtx insn, rtx
}
}
+/* Implement the TARGET_ASAN_SHADOW_OFFSET hook. */
+
+static unsigned HOST_WIDE_INT
+rs6000_asan_shadow_offset (void)
+{
+ return (unsigned HOST_WIDE_INT) 1 << (TARGET_64BIT ? 41 : 29);
+}
/* Mask options that we want to support inside of attribute((target)) and
#pragma GCC target operations. Note, we do not include things like
Index: gcc/config/rs6000/rs6000.h
===================================================================
--- gcc/config/rs6000/rs6000.h (revision 194226)
+++ gcc/config/rs6000/rs6000.h (working copy)
@@ -1406,7 +1406,7 @@ extern enum reg_class rs6000_constraints
On the RS/6000, we grow upwards, from the area after the outgoing
arguments. */
-#define FRAME_GROWS_DOWNWARD (flag_stack_protect != 0)
+#define FRAME_GROWS_DOWNWARD (flag_stack_protect != 0 || flag_asan != 0)
/* Size of the outgoing register save area */
#define RS6000_REG_SAVE ((DEFAULT_ABI == ABI_AIX \
