kernel_optimize_test/arch/um/sys-i386/Makefile
Paolo 'Blaisorblade' Giarrusso 275e6e1ee2 [PATCH] uml: fix compilation and execution with hardened GCC
To make some half-assembly stubs compile, disable various "hardened" GCC
features:

*) we can't make it build PIC code as we need %ebx to do syscalls and GCC
   wants it free for PIC

*) we can't leave stack protection as the stub is moved (not relocated!) in
   memory so the RIP-relative access to the canary tries reading from an
   unmapped address and causes a segfault, since we move the stub of various
   megabytes (the exact amount will be decided at runtime) away from the
   link-time address.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:45 -07:00

24 lines
663 B
Makefile

obj-y = bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \
ptrace_user.o signal.o sigcontext.o syscalls.o sysrq.o \
sys_call_table.o tls.o
obj-$(CONFIG_MODE_SKAS) += stub.o stub_segv.o
subarch-obj-y = lib/bitops.o kernel/semaphore.o
subarch-obj-$(CONFIG_HIGHMEM) += mm/highmem.o
subarch-obj-$(CONFIG_MODULES) += kernel/module.o
USER_OBJS := bugs.o ptrace_user.o sigcontext.o fault.o stub_segv.o
USER_OBJS += user-offsets.s
extra-y += user-offsets.s
CFLAGS_stub_segv.o := $(CFLAGS_NO_HARDENING)
extra-$(CONFIG_MODE_TT) += unmap.o
include arch/um/scripts/Makefile.rules
$(obj)/stub_segv.o $(obj)/unmap.o: \
_c_flags = $(call unprofile,$(CFLAGS))