creport: Implement process open, stub exception parsing.

stratosphere/creport/source/creport_crash_report.cpp

@@ -1,10 +1,105 @@
 #include <switch.h>
 #include "creport_crash_report.hpp"
+#include "creport_debug_types.hpp"
 
 void CrashReport::BuildReport(u64 pid, bool has_extra_info) {
     this->has_extra_info = has_extra_info;
     if (OpenProcess(pid)) {
-        /* TODO: Actually generate report... */
+        ProcessExceptions();
+        
+        /* TODO: More stuff here (sub_7100002260)... */
         Close();
     }
 }
+
+void CrashReport::ProcessExceptions() {
+    if (!IsOpen()) {
+        return;
+    }
+    
+    DebugEventInfo d;
+    while (R_SUCCEEDED(svcGetDebugEvent((u8 *)&d, this->debug_handle))) {
+        switch (d.type) {
+            case DebugEventType::AttachProcess:
+                HandleAttachProcess(d);
+                break;
+            case DebugEventType::Exception:
+                HandleException(d);
+                break;
+            case DebugEventType::AttachThread:
+            case DebugEventType::ExitProcess:
+            case DebugEventType::ExitThread:
+            default:
+                break;
+        }
+    }
+}
+
+void CrashReport::HandleAttachProcess(DebugEventInfo &d) {
+    this->process_info = d.info.attach_process;
+    if (kernelAbove500() && IsApplication()) {
+        /* Parse out user data. */
+        MemoryInfo mi;
+        u32 pi;
+        u64 address = this->process_info.user_exception_context_address;
+        u64 userdata_address = 0;
+        u64 userdata_size = 0;
+        
+        if (R_FAILED(svcQueryDebugProcessMemory(&mi, &pi, this->debug_handle, address))) {
+            return;
+        }
+        
+        /* Must be read or read-write */
+        if ((mi.perm | Perm_W) != Perm_Rw) {
+            return;
+        }
+        
+        /* Must have space for both userdata address and userdata size. */
+        if (address < mi.addr || mi.addr + mi.size < address + 2 * sizeof(u64)) {
+            return;
+        }
+        
+        /* Read userdata address. */
+        if (R_FAILED(svcReadDebugProcessMemory(&userdata_address, this->debug_handle, address, sizeof(userdata_address)))) {
+            return;
+        }
+        
+        /* Validate userdata address. */
+        if (userdata_address == 0 || userdata_address & 0xFFF) {
+            return;
+        }
+        
+        /* Read userdata size. */
+        if (R_FAILED(svcReadDebugProcessMemory(&userdata_size, this->debug_handle, address + sizeof(userdata_address), sizeof(userdata_size)))) {
+            return;
+        }
+        
+        /* Cap userdata size. */
+        if (userdata_size > 0x1000) {
+            userdata_size = 0x1000;
+        }
+        
+        /* Assign. */
+        this->userdata_5x_address = userdata_address;
+        this->userdata_5x_size = userdata_size;
+    }
+}
+
+void CrashReport::HandleException(DebugEventInfo &d) {
+    switch (d.info.exception.type) {
+        case DebugExceptionType::UndefinedInstruction:
+        case DebugExceptionType::InstructionAbort:
+        case DebugExceptionType::DataAbort:
+        case DebugExceptionType::AlignmentFault:
+        case DebugExceptionType::UserBreak:
+        case DebugExceptionType::BadSvc:
+        case DebugExceptionType::UnknownNine:
+            /* TODO: Handle these exceptions...creport seems to discard all but the latest exception? */
+            break;
+        case DebugExceptionType::DebuggerAttached:
+        case DebugExceptionType::BreakPoint:
+        case DebugExceptionType::DebuggerBreak:
+        default:
+            break;
+    }
+}

stratosphere/creport/source/creport_crash_report.hpp

@@ -2,16 +2,24 @@
 
 #include <switch.h>
 
+#include "creport_debug_types.hpp"
+
 class CrashReport {
     private:
         Handle debug_handle;
         bool has_extra_info;
         Result result;
         
+        /* Attach Process Info. */ 
+        AttachProcessInfo process_info;
+        u64 userdata_5x_address;
+        u64 userdata_5x_size;
+        
     public:
-        CrashReport() : debug_handle(INVALID_HANDLE), result(0x4A2) { }
+        CrashReport() : debug_handle(INVALID_HANDLE), result(0xC6A8), process_info({0}) { }
         
         void BuildReport(u64 pid, bool has_extra_info);
+        void ProcessExceptions();
         
         Result GetResult() {
             return this->result;
@@ -21,10 +29,25 @@ class CrashReport {
             return R_SUCCEEDED(svcDebugActiveProcess(&debug_handle, pid));
         }
         
+        bool IsOpen() {
+            return this->debug_handle != INVALID_HANDLE;
+        }
+        
         void Close() {
-            if (debug_handle != INVALID_HANDLE) {
+            if (IsOpen()) {
                 svcCloseHandle(debug_handle);
                 debug_handle = INVALID_HANDLE;
             }
         }
+        
+        bool IsApplication() {
+            return (process_info.flags & 0x40) != 0;
+        }
+        
+        bool Is64Bit() {
+            return (process_info.flags & 0x01) != 0;
+        }
+    private:
+        void HandleAttachProcess(DebugEventInfo &d);
+        void HandleException(DebugEventInfo &d);
 };

stratosphere/creport/source/creport_debug_types.hpp

@@ -0,0 +1,86 @@
+#pragma once
+#include <switch.h>
+
+struct AttachProcessInfo {
+    u64 title_id;
+    u64 process_id;
+    char name[0xC];
+    u32 flags;
+    u64 user_exception_context_address; /* 5.0.0+ */
+};
+
+struct AttachThreadInfo {
+    u64 thread_id;
+    u64 tls_address;
+    u64 entrypoint;
+};
+
+/* TODO: ExitProcessInfo */
+/* TODO: ExitThreadInfo */
+
+enum class DebugExceptionType : u32 {
+    UndefinedInstruction = 0,
+    InstructionAbort = 1,
+    DataAbort = 2,
+    AlignmentFault = 3,
+    DebuggerAttached = 4,
+    BreakPoint = 5,
+    UserBreak = 6,
+    DebuggerBreak = 7,
+    BadSvc = 8,
+    UnknownNine = 9,
+};
+
+struct UndefinedInstructionInfo {
+    u32 insn;
+};
+
+struct DataAbortInfo {
+    u64 address;
+};
+
+struct AlignmentFaultInfo {
+    u64 address;
+};
+
+struct BadSvcInfo {
+    u32 id;
+};
+
+union SpecificExceptionInfo {
+    UndefinedInstructionInfo undefined_instruction;
+    DataAbortInfo data_abort;
+    AlignmentFaultInfo alignment_fault;
+    BadSvcInfo bad_svc;
+    u64 raw;
+};
+
+static_assert(sizeof(SpecificExceptionInfo) == sizeof(u64), "Bad SpecificExceptionInfo definition!");
+
+struct ExceptionInfo {
+    DebugExceptionType type;
+    u64 address;
+    SpecificExceptionInfo specific;
+};
+
+
+enum class DebugEventType : u32 {
+    AttachProcess = 0,
+    AttachThread = 1,
+    ExitProcess = 2,
+    ExitThread = 3,
+    Exception = 4
+};
+
+union DebugInfo {
+    AttachProcessInfo attach_process;
+    AttachThreadInfo attach_thread;
+    ExceptionInfo exception;
+};
+
+struct DebugEventInfo {
+    DebugEventType type;
+    u32 flags;
+    u64 thread_id;
+    DebugInfo info;
+};