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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-11-17 18:22:04 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-11-17 18:22:04 +1100 |
| commit | 71664fd8d2d2550a56cc6a9c2b81797bfe90d613 (patch) | |
| tree | 6f55e009ff6a8b00f9f1c7a905ad4075225dec93 /Makefile.main | |
| parent | 31d20fc02c8ee7c12d84bc28ce732bbc362ce369 (diff) | |
| download | skiboot-71664fd8d2d2550a56cc6a9c2b81797bfe90d613.zip skiboot-71664fd8d2d2550a56cc6a9c2b81797bfe90d613.tar.gz skiboot-71664fd8d2d2550a56cc6a9c2b81797bfe90d613.tar.bz2 | |
Stack checking extensions
This patch adds:
- Normal builds are done with -fstack-protector (we want to investigate
using -fstack-protector-strong on gcc4.9 but for now we just use that
- Build with STACK_CHECK=1 will use -fstack-protector-all and -pg and
will check the stack in mcount
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'Makefile.main')
| -rw-r--r-- | Makefile.main | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/Makefile.main b/Makefile.main index 4df3cfd..aff145e 100644 --- a/Makefile.main +++ b/Makefile.main @@ -50,7 +50,16 @@ CPPFLAGS += -DBITS_PER_LONG=64 -m64 -DHAVE_BIG_ENDIAN # causing all our printf's to warn CPPFLAGS += -ffreestanding -CFLAGS := -fno-strict-aliasing -fno-stack-protector -pie +CFLAGS := -fno-strict-aliasing -fstack-protector-all -pie + +ifeq ($(STACK_CHECK),1) +CFLAGS += -fstack-protector-all -pg +CPPFLAGS += -DSTACK_CHECK_ENABLED +else +# XXX Add -fstack-protector-strong on gcc 4.9 +CFLAGS += -fstack-protector +endif + CFLAGS += $(CWARNS) $(OPTS) $(DBG) LDFLAGS := -m64 -static -nostdlib -Wl,--gc-sections -pie |