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mingw: do not let ld strip relocations

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This is the first step for enabling ASLR (Address Space Layout
Randomization) support. We want to enable ASLR for better protection
against exploiting security holes in Git: it makes it harder to attack
software by making code addresses unpredictable.

The problem fixed by this commit is that `ld.exe` seems to be stripping
relocations which in turn will break ASLR support. We just make sure
it's not stripping the main executable entry.

Signed-off-by: İsmail Dönmez <ismail@i10z.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
İsmail Dönmez 2019-05-08 04:30:58 -07:00 committed by Junio C Hamano
parent 6a6c0f10a7
commit 598b6c3a92
1 changed files with 2 additions and 0 deletions
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2
config.mak.uname
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@ -578,10 +578,12 @@ else
ifeq (MINGW32,$(MSYSTEM))
prefix = /mingw32
HOST_CPU = i686
BASIC_LDFLAGS += -Wl,--pic-executable,-e,_mainCRTStartup
endif
ifeq (MINGW64,$(MSYSTEM))
prefix = /mingw64
HOST_CPU = x86_64
BASIC_LDFLAGS += -Wl,--pic-executable,-e,mainCRTStartup
else
COMPAT_CFLAGS += -D_USE_32BIT_TIME_T
BASIC_LDFLAGS += -Wl,--large-address-aware