rosalina: add hidden debug info menu

k11_extension/include/globals.h

@@ -132,6 +132,7 @@ typedef struct CfwInfo
 } CfwInfo;
 
 extern CfwInfo cfwInfo;
+extern u32 kextBasePa;
 
 extern vu32 rosalinaState;
 extern bool hasStartedRosalinaNetworkFuncsOnce;

k11_extension/source/globals.c

@@ -108,6 +108,7 @@ void (*mcuReboot)(void);
 void (*coreBarrier)(void);
 
 CfwInfo cfwInfo;
+u32 kextBasePa;
 
 vu32 rosalinaState;
 bool hasStartedRosalinaNetworkFuncsOnce;

k11_extension/source/main.c

@@ -271,6 +271,7 @@ void main(FcramLayout *layout, KCoreContext *ctxs)
     memcpy(L1MMUTableAddrs, (const void *)p->L1MMUTableAddrs, 16);
     exceptionStackTop = (u32 *)0xFFFF2000 + (1 << (32 - TTBCR - 20));
     cfwInfo = p->cfwInfo;
+    kextBasePa = p->basePA;
 
     memcpy(originalHandlers + 1, p->originalHandlers, 16);
     void **arm11SvcTable = (void**)originalHandlers[2];

k11_extension/source/svc/GetSystemInfo.c

@@ -79,7 +79,7 @@ Result GetSystemInfoHook(s64 *out, s32 type, s32 param)
                     break;
 
                 case 0x300: // K11Ext size
-                    *out = (s64)(__end__ - __start__);
+                    *out = (s64)(((u64)kextBasePa << 32) | (u64)(__end__ - __start__));
                     break;
 
                 default:

sysmodules/rosalina/include/menus.h

@@ -39,3 +39,6 @@ void RosalinaMenu_ProcessList(void);
 void RosalinaMenu_PowerOff(void);
 void RosalinaMenu_Reboot(void);
 void RosalinaMenu_Cheats(void);
+
+bool rosalinaMenuShouldShowDebugInfo(void);
+void RosalinaMenu_ShowDebugInfo(void);

sysmodules/rosalina/include/utils.h

@@ -62,3 +62,7 @@ static inline bool isServiceUsable(const char *name)
     bool r;
     return R_SUCCEEDED(srvIsServiceRegistered(&r, name)) && r;
 }
+
+void formatMemoryPermission(char *outbuf, MemPerm perm);
+void formatUserMemoryState(char *outbuf, MemState state);
+u32 formatMemoryMapOfProcess(char *outbuf, u32 bufLen, Handle handle);

sysmodules/rosalina/source/gdb/remote_command.c

@@ -11,6 +11,8 @@
 #include "fmt.h"
 #include "gdb/breakpoints.h"
 
+#include "../utils.h"
+
 struct
 {
     const char *name;
@@ -208,84 +210,19 @@ GDB_DECLARE_REMOTE_COMMAND_HANDLER(GetMmuConfig)
     return GDB_SendHexPacket(ctx, outbuf, n);
 }
 
-static const char  *FormatMemPerm(u32 perm)
-{
-    if (perm == MEMPERM_DONTCARE)
-        return "???";
-
-    static char     buf[4] = {0};
-
-    buf[0] = perm & MEMPERM_READ ? 'r' : '-';
-    buf[1] = perm & MEMPERM_WRITE ? 'w' : '-';
-    buf[2] = perm & MEMPERM_EXECUTE ? 'x' : '-';
-
-    return buf;
-}
-
-static const char   *FormatMemState(u32 state)
-{
-    if (state > 11)
-        return "Unknown";
-
-    static const char *states[12] =
-    {
-        "Free",
-        "Reserved",
-        "IO",
-        "Static",
-        "Code",
-        "Private",
-        "Shared",
-        "Continuous",
-        "Aliased",
-        "Alias",
-        "AliasCode",
-        "Locked"
-    };
-
-    return states[state];
-}
-
 GDB_DECLARE_REMOTE_COMMAND_HANDLER(GetMemRegions)
 {
-    u32         address = 0;
     u32         posInBuffer = 0;
-    u32         maxPosInBuffer = GDB_BUF_LEN / 2 - 35; ///< 35 is the maximum length of a formatted region
     Handle      handle;
-    MemInfo     memi;
-    PageInfo    pagei;
     char        outbuf[GDB_BUF_LEN / 2 + 1];
 
     if(R_FAILED(svcOpenProcess(&handle, ctx->pid)))
     {
         posInBuffer = sprintf(outbuf, "Invalid process (wtf?)\n");
-        goto end;
+        return GDB_SendHexPacket(ctx, outbuf, posInBuffer);
     }
 
-    s64 TTBCR;
-    svcGetSystemInfo(&TTBCR, 0x10002, 0);
-
-    while (address < (1u << (32 - (u32)TTBCR)) ///< Limit to check for regions
-        && posInBuffer < maxPosInBuffer
-        && R_SUCCEEDED(svcQueryProcessMemory(&memi, &pagei, handle, address)))
-    {
-        // Update the address for next region
-        address = memi.base_addr + memi.size;
-
-        // If region isn't FREE then add it to the list
-        if (memi.state != MEMSTATE_FREE)
-        {
-            const char *perm = FormatMemPerm(memi.perm);
-            const char *state = FormatMemState(memi.state);
-
-            posInBuffer += sprintf(outbuf + posInBuffer, "%08lx - %08lx %s %s\n",
-                memi.base_addr, address, perm, state);
-        }
-    }
-
-    svcCloseHandle(handle);
-
-end:
+    posInBuffer = formatMemoryMapOfProcess(outbuf, GDB_BUF_LEN / 2, handle);
     return GDB_SendHexPacket(ctx, outbuf, posInBuffer);
 }
 

sysmodules/rosalina/source/menus.c

@@ -55,10 +55,44 @@ Menu rosalinaMenu = {
         { "Power off", METHOD, .method = &RosalinaMenu_PowerOff },
         { "Reboot", METHOD, .method = &RosalinaMenu_Reboot },
         { "Credits", METHOD, .method = &RosalinaMenu_ShowCredits },
+        { "Debug info", METHOD, .method = &RosalinaMenu_ShowDebugInfo, .visibility = &rosalinaMenuShouldShowDebugInfo },
         {},
     }
 };
 
+bool rosalinaMenuShouldShowDebugInfo(void)
+{
+    return false;
+}
+
+void RosalinaMenu_ShowDebugInfo(void)
+{
+    Draw_Lock();
+    Draw_ClearFramebuffer();
+    Draw_FlushFramebuffer();
+    Draw_Unlock();
+
+    char memoryMap[512];
+    formatMemoryMapOfProcess(memoryMap, 511, CUR_PROCESS_HANDLE);
+
+    s64 kextAddrSize;
+    svcGetSystemInfo(&kextAddrSize, 0x10000, 0x300);
+    u32 kextPa = (u32)((u64)kextAddrSize >> 32);
+    u32 kextSize = (u32)kextAddrSize;
+
+    do
+    {
+        Draw_Lock();
+        Draw_DrawString(10, 10, COLOR_TITLE, "Rosalina -- Debug info");
+
+        u32 posY = Draw_DrawString(10, 30, COLOR_WHITE, memoryMap);
+        Draw_DrawFormattedString(10, posY, COLOR_WHITE, "Kernel ext PA: %08lx - %08lx\n", kextPa, kextPa + kextSize);
+        Draw_FlushFramebuffer();
+        Draw_Unlock();
+    }
+    while(!(waitInput() & KEY_B) && !menuShouldExit);
+}
+
 void RosalinaMenu_ShowCredits(void)
 {
     Draw_Lock();

sysmodules/rosalina/source/utils.c

@@ -0,0 +1,110 @@
+/*
+*   This file is part of Luma3DS
+*   Copyright (C) 2016-2020 Aurora Wright, TuxSH
+*
+*   This program is free software: you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation, either version 3 of the License, or
+*   (at your option) any later version.
+*
+*   This program is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details.
+*
+*   You should have received a copy of the GNU General Public License
+*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*
+*   Additional Terms 7.b and 7.c of GPLv3 apply to this file:
+*       * Requiring preservation of specified reasonable legal notices or
+*         author attributions in that material or in the Appropriate Legal
+*         Notices displayed by works containing it.
+*       * Prohibiting misrepresentation of the origin of that material,
+*         or requiring that modified versions of such material be marked in
+*         reasonable ways as different from the original version.
+*/
+
+#include "utils.h"
+#include "csvc.h"
+#include <string.h>
+#include <stdio.h>
+
+void formatMemoryPermission(char *outbuf, MemPerm perm)
+{
+    if (perm == MEMPERM_DONTCARE)
+    {
+        strcpy(outbuf, "???");
+        return;
+    }
+
+    outbuf[0] = perm & MEMPERM_READ ? 'r' : '-';
+    outbuf[1] = perm & MEMPERM_WRITE ? 'w' : '-';
+    outbuf[2] = perm & MEMPERM_EXECUTE ? 'x' : '-';
+    outbuf[3] = '\0';
+}
+
+void formatUserMemoryState(char *outbuf, MemState state)
+{
+    static const char *states[12] =
+    {
+        "Free",
+        "Reserved",
+        "IO",
+        "Static",
+        "Code",
+        "Private",
+        "Shared",
+        "Continuous",
+        "Aliased",
+        "Alias",
+        "AliasCode",
+        "Locked"
+    };
+
+    strcpy(outbuf, state > 11 ? "Unknown" : states[state]);
+}
+
+u32 formatMemoryMapOfProcess(char *outbuf, u32 bufLen, Handle handle)
+{
+    u32         maxLineSize = 35 + (handle == CUR_PROCESS_HANDLE ? 15 : 0);
+    u32         address = 0;
+    u32         posInBuffer = 0;
+    u32         maxPosInBuffer = bufLen - maxLineSize; // 35 is the maximum length of a formatted region
+    MemInfo     memi;
+    PageInfo    pagei;
+    char        pabuf[32];
+    char        permbuf[8];
+    char        statebuf[16];
+
+    s64 TTBCR;
+    svcGetSystemInfo(&TTBCR, 0x10002, 0);
+
+    while (address < (1u << (32 - (u32)TTBCR)) // Limit to check for regions
+        && posInBuffer < maxPosInBuffer
+        && R_SUCCEEDED(svcQueryProcessMemory(&memi, &pagei, handle, address)))
+    {
+        // Update the address for next region
+        address = memi.base_addr + memi.size;
+
+        // If region isn't FREE then add it to the list
+        if (memi.state != MEMSTATE_FREE)
+        {
+            if (handle == CUR_PROCESS_HANDLE)
+            {
+                u32 pa = svcConvertVAToPA((void *)memi.base_addr, false);
+                sprintf(pabuf, " (PA %08lx)", pa);
+            }
+            else
+                pabuf[0] = '\0';
+
+            formatMemoryPermission(permbuf, memi.perm);
+            formatUserMemoryState(statebuf, memi.state);
+
+            posInBuffer += sprintf(outbuf + posInBuffer, "%08lx - %08lx%s %s %s\n",
+                memi.base_addr, address, pabuf, permbuf, statebuf);
+        }
+    }
+
+    svcCloseHandle(handle);
+    return posInBuffer;
+}