Building libunwind with new CMakeLists.

The old CMakeLists file of libunwind used the C compiler to compile assembly files. This caused such code not to be hardened.

Author: raoulstrackx

src/test/assembly/x86_64-fortanix-unknown-sgx-lvi-module-level-assembly.rs

@@ -10,7 +10,3 @@ global_asm!(".start_module_asm:
             movq (%rdi), %rax
             retq
             .end_module_asm:" );
-
-// CHECK: .start_module_asm
-// TODO add check, when module-level pass is corrected
-// CHECK: .end_module_asm

src/test/run-make/x86_64-fortanix-unknown-sgx-lvi/script.sh

@@ -31,12 +31,8 @@ function check {
 
 build
 
-#TODO: re-enable check when newly compiled libunwind is used
-#check unw_getcontext unw_getcontext.checks
-
-#TODO: re-enable check when newly compiled libunwind is used
-#check "libunwind::Registers_x86_64::jumpto()" jumpto.checks
-
+check unw_getcontext unw_getcontext.checks
+check "libunwind::Registers_x86_64::jumpto()" jumpto.checks
 check "std::io::stdio::_print::h87f0c238421c45bc" print.checks
 check rust_plus_one_global_asm rust_plus_one_global_asm.checks || echo "warning: module level assembly currently not hardened"
 

src/test/run-make/x86_64-fortanix-unknown-sgx-lvi/unw_getcontext.checks

@@ -1,7 +1,6 @@
 CHECK: unw_getcontext
 CHECK:      lfence
 CHECK:      lfence
-CHECK:      notq (%rsp)
-CHECK-NEXT: notq (%rsp)
+CHECK:      shlq    $0, (%rsp)
 CHECK-NEXT: lfence
 CHECK-NEXT: retq