From a58c22d61260941fc651add73836882d5b112fdb Mon Sep 17 00:00:00 2001 From: Alex Smith Date: Sat, 26 Sep 2015 02:43:23 -0400 Subject: configure: Support for HEASLR on mingw targets The appropriate flag for HEASLR (--high-entropy-va) was added in binutils 2.25. Also set the image base >4GB so higher entropy gets applied to image base randomization when used with HEASLR (8 -> 17 bits of randomization). Windows does this for compatibility because of "latent pointer truncation issues". Signed-off-by: Alex Smith --- configure | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'configure') diff --git a/configure b/configure index bd4f91d18a..b572d598d4 100755 --- a/configure +++ b/configure @@ -4400,6 +4400,10 @@ case $target_os in add_ldexeflags -Wl,--pic-executable,-e,_mainCRTStartup elif enabled x86_64; then add_ldexeflags -Wl,--pic-executable,-e,mainCRTStartup + check_ldflags -Wl,--high-entropy-va # binutils 2.25 + # Set image base >4GB for extra entropy with HEASLR + add_ldexeflags -Wl,--image-base,0x140000000 + append SHFLAGS -Wl,--image-base,0x180000000 fi ;; win32|win64) -- cgit v1.2.3