Try to add support for VFP registers

src/core/gdbstub/gdbstub.cpp

@@ -56,6 +56,7 @@ const u32 MSG_WAITALL = 8;
 const u32 R0_REGISTER = 0;
 const u32 R15_REGISTER = 15;
 const u32 CSPR_REGISTER = 25;
+const u32 FPSCR_REGISTER = 58;
 
 namespace GDBStub {
 
@@ -468,6 +469,10 @@ static void ReadRegister() {
         IntToHex(reply, Core::g_app_core->GetReg(id));
     } else if (id == CSPR_REGISTER) {
         IntToHex(reply, Core::g_app_core->GetCPSR());
+    } else if (id > CSPR_REGISTER && id < FPSCR_REGISTER) {
+        IntToHex(reply, Core::g_app_core->GetVFPReg(id - CSPR_REGISTER - 1)); // VFP registers should start at 26, so one after CSPR_REGISTER
+    } else if (id == FPSCR_REGISTER) {
+        IntToHex(reply, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR)); // Get FPSCR
     } else {
         return SendReply("E01");
     }
@@ -481,15 +486,19 @@ static void ReadRegisters() {
     memset(buffer, 0, sizeof(buffer));
 
     u8* bufptr = buffer;
-    for (int i = 0; i <= CSPR_REGISTER; i++) {
+    for (int i = 0; i <= FPSCR_REGISTER; i++) {
         if (i <= R15_REGISTER) {
             IntToHex(bufptr + i * 8, Core::g_app_core->GetReg(i));
         } else if (i == CSPR_REGISTER) {
             IntToHex(bufptr + i * 8, Core::g_app_core->GetCPSR());
-        } else {
+        } else if (i < CSPR_REGISTER) {
             IntToHex(bufptr + i * 8, 0);
             IntToHex(bufptr + (i + 1) * 8, 0);
             i++; // These registers seem to be all 64bit instead of 32bit, so skip two instead of one
+        } else if (i > CSPR_REGISTER && i < FPSCR_REGISTER) {
+            IntToHex(bufptr + i * 8, Core::g_app_core->GetVFPReg(i - CSPR_REGISTER - 1));
+        } else if (i == FPSCR_REGISTER) {
+            IntToHex(bufptr + i * 8, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR));
         }
     }
 
@@ -511,6 +520,10 @@ static void WriteRegister() {
         Core::g_app_core->SetReg(id, HexToInt(buffer_ptr));
     } else if (id == CSPR_REGISTER) {
         Core::g_app_core->SetCPSR(HexToInt(buffer_ptr));
+    } else if (id > CSPR_REGISTER && id < FPSCR_REGISTER) {
+        Core::g_app_core->SetVFPReg(id - CSPR_REGISTER - 1, HexToInt(buffer_ptr));
+    } else if (id == FPSCR_REGISTER) {
+        Core::g_app_core->SetVFPSystemReg(VFP_FPSCR, HexToInt(buffer_ptr));
     } else {
         return SendReply("E01");
     }
@@ -525,13 +538,17 @@ static void WriteRegisters() {
     if (command_buffer[0] != 'G')
         return SendReply("E01");
 
-    for (int i = 0; i <= CSPR_REGISTER; i++) {
+    for (int i = 0; i <= FPSCR_REGISTER; i++) {
         if (i <= R15_REGISTER) {
             Core::g_app_core->SetReg(i, HexToInt(buffer_ptr + i * 8));
         } else if (i == CSPR_REGISTER) {
             Core::g_app_core->SetCPSR(HexToInt(buffer_ptr + i * 8));
-        } else {
+        } else if (i < CSPR_REGISTER) {
             i++; // These registers seem to be all 64bit instead of 32bit, so skip two instead of one
+        } else if (i > CSPR_REGISTER && i < FPSCR_REGISTER) {
+            Core::g_app_core->SetVFPReg(i - CSPR_REGISTER - 1, HexToInt(buffer_ptr + i * 8));
+        } else if (i == FPSCR_REGISTER) {
+            Core::g_app_core->SetVFPSystemReg(VFP_FPSCR, HexToInt(buffer_ptr + i * 8));
         }
     }