Support single-step

acac1cfd · Wesley W. Terpstra · 2020a563 · acac1cfd · acac1cfd · acac1cfd
Commit acac1cfd authored Apr 11, 2011 by Wesley W. Terpstra
4 changed files
--- a/src/components/gdb-rsp/gdb-rsp.cpp
+++ b/src/components/gdb-rsp/gdb-rsp.cpp
@@ -273,7 +273,19 @@ void GDB_RSP::cmdDetach(const std::string& str) {
 }

 void GDB_RSP::cmdContinue(const std::string& str) {
-  run();
+  const char* ptr = str.c_str() + 1;
+  
+  uint64_t address;
+  if (fromHex(ptr, address) == 0) {
+    register_address(Bits(PC));
+    register_write(Bits(address));
+  }
+  
+  if (str[0] == 's')
+    run(Bits(static_cast<uint8_t>(1)));
+  else
+    run(Bits(static_cast<uint8_t>(0)));
+  
  cmdStatus(str);
 }


--- a/src/components/gdb-rsp/gdb-rsp.h
+++ b/src/components/gdb-rsp/gdb-rsp.h
@@ -38,8 +38,8 @@ class GDB_RSP : public Component {
    SlavePort& breakpoint_del; /* width -> void */
 #endif
    
-    /* Run processor */
-    SlavePort& run; /* 0-bit -> void */
+    /* Run processor: 1 = single-step, 0 = continue */
+    SlavePort& run; /* 8-bit -> void */
    
  protected:
    uint8_t registers, PC, SP, SIG;

--- a/src/components/gdb-rsp/gdb-serial.cpp
+++ b/src/components/gdb-rsp/gdb-serial.cpp
@@ -3,7 +3,7 @@
 #include "gdb-serial.h"
 #include "pinouts/pinouts.h"

-// #define DEBUG_GDB 1
+#define DEBUG_GDB 1

 GDB_Serial::GDB_Serial(Interconnect* ic)
 : Component(ic),

--- a/src/components/lm32/lm32-drom.cpp
+++ b/src/components/lm32/lm32-drom.cpp
@@ -86,6 +86,11 @@ SendQueue::const_iterator LM32DROM::send(SendQueue::const_iterator i, SendQueue:
          --i;
        } else {
          assert (i->master == &run);
+          if (i->bits[0])
+            setReg(DC, getReg(DC) | 1);
+          else
+            setReg(DC, getReg(DC) & ~1);
+          
          update();
          uart_write(Bits(static_cast<uint8_t>(0)));
          state = RUNNING;