From 06c3215546f58c988360f5e0df3ac5f05090ba30 Mon Sep 17 00:00:00 2001
From: PabloMK7 <hackyglitch2@gmail.com>
Date: Sat, 17 Jun 2023 17:21:42 +0200
Subject: [PATCH] Add svcGetSystemInfo option to get booted firm path

---
 arm9/source/patches.c                    | 6 ++++++
 k11_extension/include/globals.h          | 2 ++
 k11_extension/source/svc/GetSystemInfo.c | 9 ++++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/arm9/source/patches.c b/arm9/source/patches.c
index f9af12c..e01a631 100644
--- a/arm9/source/patches.c
+++ b/arm9/source/patches.c
@@ -44,6 +44,8 @@
 
 #define K11EXT_VA         0x70000000
 
+extern u16 launchedPath[];
+
 u8 *getProcess9Info(u8 *pos, u32 size, u32 *process9Size, u32 *process9MemAddr)
 {
     u8 *temp = memsearch(pos, "NCCH", size, 4);
@@ -139,6 +141,8 @@ u32 installK11Extension(u8 *pos, u32 size, bool needToInitSd, u32 baseK11VA, u32
 
             u64 autobootTwlTitleId;
             u8 autobootCtrAppmemtype;
+
+            u16 launchedPath[80+1];
         } info;
     };
 
@@ -226,6 +230,8 @@ u32 installK11Extension(u8 *pos, u32 size, bool needToInitSd, u32 baseK11VA, u32
     if(needToInitSd) info->flags |= 1 << 5;
     if(isSdMode) info->flags |= 1 << 6;
 
+    memcpy(info->launchedPath, launchedPath, sizeof(info->launchedPath));
+
     return 0;
 }
 
diff --git a/k11_extension/include/globals.h b/k11_extension/include/globals.h
index 6468589..d6e4dcb 100644
--- a/k11_extension/include/globals.h
+++ b/k11_extension/include/globals.h
@@ -146,6 +146,8 @@ typedef struct CfwInfo
 
     u64 autobootTwlTitleId;
     u8 autobootCtrAppmemtype;
+
+    u16 launchedPath[80+1];
 } CfwInfo;
 
 extern CfwInfo cfwInfo;
diff --git a/k11_extension/source/svc/GetSystemInfo.c b/k11_extension/source/svc/GetSystemInfo.c
index 0e88365..6ed13c0 100644
--- a/k11_extension/source/svc/GetSystemInfo.c
+++ b/k11_extension/source/svc/GetSystemInfo.c
@@ -37,7 +37,14 @@ Result GetSystemInfoHook(s64 *out, s32 type, s32 param)
     {
         case 0x10000:
         {
-            switch(param)
+            if (param >= 0x400 && param < 0x500) {
+                *out = 0;
+                s32 offset = param - 0x400;
+                s32 toCopy = (s32)sizeof(cfwInfo.launchedPath) - offset;
+                if (toCopy > 8) toCopy = 8;
+                memcpy(out, (u8*)cfwInfo.launchedPath + offset, (toCopy > 0) ? toCopy : 0);
+            } 
+            else switch(param)
             {
                 // Please do not use these, except 0, 1, and 0x200
                 // Other types may get removed or reordered without notice