[Lldb-commits] [lldb] [lldb][AIX] Implement read/write handling for GPR and SPR registers (PR #193205)

[Hemang Gadhavi via lldb-commits]

================
@@ -279,13 +283,90 @@ llvm::Error NativeProcessAIX::Detach(lldb::tid_t tid) {
   return PtraceWrapper(PT_DETACH, tid).takeError();
 }
 
+template <typename GPR_T, typename PTSPRS_T>
+llvm::Expected<int> GetSPRs(int req, lldb::tid_t tid, GPR_T *gpr) {
+  PTSPRS_T sprs;
+
+  int ret = ptrace64(req, tid, (long long)&sprs, 0, 0);
+
+  if (ret != -1) {
+    gpr->cr = sprs.pt_cr;
+    gpr->msr = sprs.pt_msr;
+    gpr->xer = sprs.pt_xer;
+    gpr->lr = sprs.pt_lr;
+    gpr->ctr = sprs.pt_ctr;
+    gpr->pc = sprs.pt_iar;
+  }
+  return ret;
+}
+
+template <typename GPR_T, typename PTSPRS_T>
+llvm::Expected<int> SetSPRs(int req, lldb::tid_t tid, GPR_T *gpr) {
+  PTSPRS_T sprs;
+
+  sprs.pt_cr = gpr->cr;
+  sprs.pt_msr = gpr->msr;
+  sprs.pt_xer = gpr->xer;
+  sprs.pt_lr = gpr->lr;
+  sprs.pt_ctr = gpr->ctr;
+  sprs.pt_iar = gpr->pc;
+
+  return (ptrace64(req, tid, (long long)&sprs, 0, 0));
+}
+
 llvm::Expected<int> NativeProcessAIX::PtraceWrapper(int req, lldb::pid_t pid,
                                                     void *addr, void *data,
                                                     size_t data_size) {
   int ret;
-
   Log *log = GetLog(POSIXLog::Ptrace);
+  // for PTT_*
+  const char procdir[] = "/proc/";
+  const char lwpdir[] = "/lwp/";
+  std::string process_task_dir = procdir + std::to_string(pid) + lwpdir;
+  DIR *dirproc = opendir(process_task_dir.c_str());
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HemangGadhavi wrote:

Yes sounds good. updated the code with llvm style. 

https://github.com/llvm/llvm-project/pull/193205