5f23f6d082
This code should be a good demonstration of how to use the new system calls as well as how to use protection keys in general. This code shows how to: 1. Manipulate the Protection Keys Rights User (PKRU) register 2. Set a protection key on memory 3. Fetch and/or modify PKRU from the signal XSAVE state 4. Read the kernel-provided protection key in the siginfo 5. Set up an execute-only mapping There are currently 13 tests: test_read_of_write_disabled_region test_read_of_access_disabled_region test_write_of_write_disabled_region test_write_of_access_disabled_region test_kernel_write_of_access_disabled_region test_kernel_write_of_write_disabled_region test_kernel_gup_of_access_disabled_region test_kernel_gup_write_to_write_disabled_region test_executing_on_unreadable_memory test_ptrace_of_child test_pkey_syscalls_on_non_allocated_pkey test_pkey_syscalls_bad_args test_pkey_alloc_exhaust Each of the tests is run with plain memory (via mmap(MAP_ANON)), transparent huge pages, and hugetlb. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: linux-arch@vger.kernel.org Cc: Dave Hansen <dave@sr71.net> Cc: mgorman@techsingularity.net Cc: arnd@arndb.de Cc: linux-api@vger.kernel.org Cc: shuahkh@osg.samsung.com Cc: linux-mm@kvack.org Cc: luto@kernel.org Cc: akpm@linux-foundation.org Cc: torvalds@linux-foundation.org Link: http://lkml.kernel.org/r/20160729163024.FC5A0C2D@viggo.jf.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
77 lines
2.3 KiB
Makefile
77 lines
2.3 KiB
Makefile
all:
|
|
|
|
include ../lib.mk
|
|
|
|
.PHONY: all all_32 all_64 warn_32bit_failure clean
|
|
|
|
TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs syscall_nt ptrace_syscall test_mremap_vdso \
|
|
check_initial_reg_state sigreturn ldt_gdt iopl \
|
|
protection_keys
|
|
TARGETS_C_32BIT_ONLY := entry_from_vm86 syscall_arg_fault test_syscall_vdso unwind_vdso \
|
|
test_FCMOV test_FCOMI test_FISTTP \
|
|
vdso_restorer
|
|
TARGETS_C_64BIT_ONLY := fsgsbase
|
|
|
|
TARGETS_C_32BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_32BIT_ONLY)
|
|
TARGETS_C_64BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_64BIT_ONLY)
|
|
BINARIES_32 := $(TARGETS_C_32BIT_ALL:%=%_32)
|
|
BINARIES_64 := $(TARGETS_C_64BIT_ALL:%=%_64)
|
|
|
|
CFLAGS := -O2 -g -std=gnu99 -pthread -Wall
|
|
|
|
UNAME_M := $(shell uname -m)
|
|
CAN_BUILD_I386 := $(shell ./check_cc.sh $(CC) trivial_32bit_program.c -m32)
|
|
CAN_BUILD_X86_64 := $(shell ./check_cc.sh $(CC) trivial_64bit_program.c)
|
|
|
|
ifeq ($(CAN_BUILD_I386),1)
|
|
all: all_32
|
|
TEST_PROGS += $(BINARIES_32)
|
|
endif
|
|
|
|
ifeq ($(CAN_BUILD_X86_64),1)
|
|
all: all_64
|
|
TEST_PROGS += $(BINARIES_64)
|
|
endif
|
|
|
|
all_32: $(BINARIES_32)
|
|
|
|
all_64: $(BINARIES_64)
|
|
|
|
clean:
|
|
$(RM) $(BINARIES_32) $(BINARIES_64)
|
|
|
|
$(TARGETS_C_32BIT_ALL:%=%_32): %_32: %.c
|
|
$(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl -lm
|
|
|
|
$(TARGETS_C_64BIT_ALL:%=%_64): %_64: %.c
|
|
$(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl
|
|
|
|
# x86_64 users should be encouraged to install 32-bit libraries
|
|
ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),01)
|
|
all: warn_32bit_failure
|
|
|
|
warn_32bit_failure:
|
|
@echo "Warning: you seem to have a broken 32-bit build" 2>&1; \
|
|
echo "environment. This will reduce test coverage of 64-bit" 2>&1; \
|
|
echo "kernels. If you are using a Debian-like distribution," 2>&1; \
|
|
echo "try:"; 2>&1; \
|
|
echo ""; \
|
|
echo " apt-get install gcc-multilib libc6-i386 libc6-dev-i386"; \
|
|
echo ""; \
|
|
echo "If you are using a Fedora-like distribution, try:"; \
|
|
echo ""; \
|
|
echo " yum install glibc-devel.*i686"; \
|
|
exit 0;
|
|
endif
|
|
|
|
# Some tests have additional dependencies.
|
|
sysret_ss_attrs_64: thunks.S
|
|
ptrace_syscall_32: raw_syscall_helper_32.S
|
|
test_syscall_vdso_32: thunks_32.S
|
|
|
|
# check_initial_reg_state is special: it needs a custom entry, and it
|
|
# needs to be static so that its interpreter doesn't destroy its initial
|
|
# state.
|
|
check_initial_reg_state_32: CFLAGS += -Wl,-ereal_start -static
|
|
check_initial_reg_state_64: CFLAGS += -Wl,-ereal_start -static
|