[llvm-objdump][llvm-readobj] Decode code caprelocs permissions

For non-c18n runtimes this is the same as a plain function capreloc, but
for c18n runtimes this marks capabilities that must not be wrapped in a
trampoline as they must point directly to the code in question.

Author: jrtc27

llvm/tools/llvm-objdump/llvm-objdump.cpp

@@ -2715,6 +2715,7 @@ printELFCapRelocations(const ELFObjectFile<ELFT> *Obj) {
     const uint64_t Function = UINT64_C(1) << ((sizeof(TargetUint) * 8) - 1);
     const uint64_t Constant = UINT64_C(1) << ((sizeof(TargetUint) * 8) - 2);
     const uint64_t Indirect = UINT64_C(1) << ((sizeof(TargetUint) * 8) - 3);
+    const uint64_t Code = UINT64_C(1) << ((sizeof(TargetUint) * 8) - 4);
     StringRef PermStr;
     switch (Perms) {
     case 0:
@@ -2729,6 +2730,9 @@ printELFCapRelocations(const ELFObjectFile<ELFT> *Obj) {
     case Function | Indirect:
       PermStr = " (GNU Indirect Function)";
       break;
+    case Function | Code:
+      PermStr = " (Code)";
+      break;
     default:
       PermStr = " (Unknown)";
       break;

llvm/tools/llvm-readobj/ELFDumper.cpp

@@ -3529,6 +3529,7 @@ template <class ELFT> void ELFDumper<ELFT>::printCheriCapRelocs() {
     const uint64_t Function = UINT64_C(1) << ((sizeof(TargetUint) * 8) - 1);
     const uint64_t Constant = UINT64_C(1) << ((sizeof(TargetUint) * 8) - 2);
     const uint64_t Indirect = UINT64_C(1) << ((sizeof(TargetUint) * 8) - 3);
+    const uint64_t Code = UINT64_C(1) << ((sizeof(TargetUint) * 8) - 4);
     StringRef PermStr;
     switch (Perms) {
     case 0:
@@ -3543,6 +3544,9 @@ template <class ELFT> void ELFDumper<ELFT>::printCheriCapRelocs() {
     case Function | Indirect:
       PermStr = "GNU Indirect Function";
       break;
+    case Function | Code:
+      PermStr = "Code";
+      break;
     default:
       PermStr = "Unknown";
       break;