Hello! > 2015-11-29 Andreas Tobler <andre...@gcc.gnu.org> > > * config/i386/i386.h: Define two new macros: > SUBTARGET_SHADOW_OFFSET_64 and SUBTARGET_SHADOW_OFFSET_32. > * config/i386/i386.c (ix86_asan_shadow_offset): Use these macros. > * config/i386/darwin.h: Override the SUBTARGET_SHADOW_OFFSET_64 > macro. > * config/i386/freebsd.h: Override the SUBTARGET_SHADOW_OFFSET_64 > and the SUBTARGET_SHADOW_OFFSET_32 macro. > * config/freebsd.h (LIBASAN_EARLY_SPEC): Define. > (LIBTSAN_EARLY_SPEC): Likewise. > (LIBLSAN_EARLY_SPEC): Likewise.
IMO, there is no compelling reason for _64 and _32 subtargets split, especially since it depends on TARGET_LP64, not on the usual TARGET_64BIT. Due to this, I'd rather introduce only TARGET_SHADOW_OFFSET, like: #define TARGET_SHADOW_OFFSET \ (TARGET_LP64 ? HOST_WIDE_INT_C (0x7fff8000) : HOST_WIDE_INT_1 << 29) (and similar for other targets). Uros.
