massive feat: added a GDB stub for debugging

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
2024-06-16 07:45:54 +05:30
parent c22333812e
commit a7d919eea0
15 changed files with 708 additions and 34 deletions
--- a/src/cpu/cpu.cc
+++ b/src/cpu/cpu.cc
@@ -129,6 +129,14 @@ Cpu::step() {
        // word align
        rst_bit(pc, 1);

+#ifdef GDB_DEBUG
+        if (breakpoints.contains(pc - 2 * arm::INSTRUCTION_SIZE)) {
+            glogger.info_bold("CPU halted");
+            halted = true;
+            return;
+        }
+#endif
+
        arm::Instruction instruction(opcodes[0]);

        opcodes[0] = opcodes[1];
@@ -148,6 +156,15 @@ Cpu::step() {
        } else
            advance_pc_arm();
    } else {
+
+#ifdef GDB_DEBUG
+        if (breakpoints.contains(pc - 2 * thumb::INSTRUCTION_SIZE)) {
+            glogger.info_bold("CPU halted");
+            halted = true;
+            return;
+        }
+#endif
+
        thumb::Instruction instruction(opcodes[0]);

        opcodes[0] = opcodes[1];