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x86: enable PIE for dynamically linked executables

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Compile all x86 programs on Android with -fPIE and -pie. This enables
PIE (Position Independent Executables), which helps protect Android
applications from exploitation due to memory management bugs.

Note 1: PIE *static* executables are not supported at this time and
require additional linker changes.

Note 2: This change compliments 026a85b129,
which was the exact same change, except for ARM.

Testing: Rebuilt the tree completely from scratch, and verified
that the system boots and basic functionality works in the emulator.

Change-Id: I990064c37da3d857e663b27f31fee05f689a2824
This commit is contained in:
Nick Kralevich
2011-11-04 13:07:26 -07:00
parent 7bbc9a174d
commit d9d2e7a42c
1 changed files with 2 additions and 1 deletions
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3
core/combo/TARGET_linux-x86.mk
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@@ -73,7 +73,7 @@ TARGET_GLOBAL_CFLAGS += \
-Wa,--noexecstack \ -Wa,--noexecstack \
-Werror=format-security \ -Werror=format-security \
-Wstrict-aliasing=2 \ -Wstrict-aliasing=2 \
-fPIC \ -fPIC -fPIE \
-ffunction-sections \ -ffunction-sections \
-finline-functions \ -finline-functions \
-finline-limit=300 \ -finline-limit=300 \
@@ -158,6 +158,7 @@ $(hide) $(PRIVATE_CXX) \
-nostdlib -Bdynamic \ -nostdlib -Bdynamic \
-Wl,-dynamic-linker,/system/bin/linker \ -Wl,-dynamic-linker,/system/bin/linker \
-Wl,-z,nocopyreloc \ -Wl,-z,nocopyreloc \
-fPIE -pie \
-o $@ \ -o $@ \
$(TARGET_GLOBAL_LD_DIRS) \ $(TARGET_GLOBAL_LD_DIRS) \
-Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \ -Wl,-rpath-link=$(TARGET_OUT_INTERMEDIATE_LIBRARIES) \