Loader: Button override + first-class HBL support

stratosphere/loader/source/ini.c

@@ -0,0 +1,269 @@
+/* inih -- simple .INI file parser
+
+inih is released under the New BSD license (see LICENSE.txt). Go to the project
+home page for more info:
+
+https://github.com/benhoyt/inih
+
+*/
+
+#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+
+#include "ini.h"
+
+#if !INI_USE_STACK
+#include <stdlib.h>
+#endif
+
+#define MAX_SECTION 50
+#define MAX_NAME 50
+
+/* Used by ini_parse_string() to keep track of string parsing state. */
+typedef struct {
+    const char* ptr;
+    size_t num_left;
+} ini_parse_string_ctx;
+
+/* Strip whitespace chars off end of given string, in place. Return s. */
+static char* rstrip(char* s)
+{
+    char* p = s + strlen(s);
+    while (p > s && isspace((unsigned char)(*--p)))
+        *p = '\0';
+    return s;
+}
+
+/* Return pointer to first non-whitespace char in given string. */
+static char* lskip(const char* s)
+{
+    while (*s && isspace((unsigned char)(*s)))
+        s++;
+    return (char*)s;
+}
+
+/* Return pointer to first char (of chars) or inline comment in given string,
+   or pointer to null at end of string if neither found. Inline comment must
+   be prefixed by a whitespace character to register as a comment. */
+static char* find_chars_or_comment(const char* s, const char* chars)
+{
+#if INI_ALLOW_INLINE_COMMENTS
+    int was_space = 0;
+    while (*s && (!chars || !strchr(chars, *s)) &&
+           !(was_space && strchr(INI_INLINE_COMMENT_PREFIXES, *s))) {
+        was_space = isspace((unsigned char)(*s));
+        s++;
+    }
+#else
+    while (*s && (!chars || !strchr(chars, *s))) {
+        s++;
+    }
+#endif
+    return (char*)s;
+}
+
+/* Version of strncpy that ensures dest (size bytes) is null-terminated. */
+static char* strncpy0(char* dest, const char* src, size_t size)
+{
+    strncpy(dest, src, size - 1);
+    dest[size - 1] = '\0';
+    return dest;
+}
+
+/* See documentation in header file. */
+int ini_parse_stream(ini_reader reader, void* stream, ini_handler handler,
+                     void* user)
+{
+    /* Uses a fair bit of stack (use heap instead if you need to) */
+#if INI_USE_STACK
+    char line[INI_MAX_LINE];
+    int max_line = INI_MAX_LINE;
+#else
+    char* line;
+    int max_line = INI_INITIAL_ALLOC;
+#endif
+#if INI_ALLOW_REALLOC
+    char* new_line;
+    int offset;
+#endif
+    char section[MAX_SECTION] = "";
+    char prev_name[MAX_NAME] = "";
+
+    char* start;
+    char* end;
+    char* name;
+    char* value;
+    int lineno = 0;
+    int error = 0;
+
+#if !INI_USE_STACK
+    line = (char*)malloc(INI_INITIAL_ALLOC);
+    if (!line) {
+        return -2;
+    }
+#endif
+
+#if INI_HANDLER_LINENO
+#define HANDLER(u, s, n, v) handler(u, s, n, v, lineno)
+#else
+#define HANDLER(u, s, n, v) handler(u, s, n, v)
+#endif
+
+    /* Scan through stream line by line */
+    while (reader(line, max_line, stream) != NULL) {
+#if INI_ALLOW_REALLOC
+        offset = strlen(line);
+        while (offset == max_line - 1 && line[offset - 1] != '\n') {
+            max_line *= 2;
+            if (max_line > INI_MAX_LINE)
+                max_line = INI_MAX_LINE;
+            new_line = realloc(line, max_line);
+            if (!new_line) {
+                free(line);
+                return -2;
+            }
+            line = new_line;
+            if (reader(line + offset, max_line - offset, stream) == NULL)
+                break;
+            if (max_line >= INI_MAX_LINE)
+                break;
+            offset += strlen(line + offset);
+        }
+#endif
+
+        lineno++;
+
+        start = line;
+#if INI_ALLOW_BOM
+        if (lineno == 1 && (unsigned char)start[0] == 0xEF &&
+                           (unsigned char)start[1] == 0xBB &&
+                           (unsigned char)start[2] == 0xBF) {
+            start += 3;
+        }
+#endif
+        start = lskip(rstrip(start));
+
+        if (strchr(INI_START_COMMENT_PREFIXES, *start)) {
+            /* Start-of-line comment */
+        }
+#if INI_ALLOW_MULTILINE
+        else if (*prev_name && *start && start > line) {
+            /* Non-blank line with leading whitespace, treat as continuation
+               of previous name's value (as per Python configparser). */
+            if (!HANDLER(user, section, prev_name, start) && !error)
+                error = lineno;
+        }
+#endif
+        else if (*start == '[') {
+            /* A "[section]" line */
+            end = find_chars_or_comment(start + 1, "]");
+            if (*end == ']') {
+                *end = '\0';
+                strncpy0(section, start + 1, sizeof(section));
+                *prev_name = '\0';
+            }
+            else if (!error) {
+                /* No ']' found on section line */
+                error = lineno;
+            }
+        }
+        else if (*start) {
+            /* Not a comment, must be a name[=:]value pair */
+            end = find_chars_or_comment(start, "=:");
+            if (*end == '=' || *end == ':') {
+                *end = '\0';
+                name = rstrip(start);
+                value = end + 1;
+#if INI_ALLOW_INLINE_COMMENTS
+                end = find_chars_or_comment(value, NULL);
+                if (*end)
+                    *end = '\0';
+#endif
+                value = lskip(value);
+                rstrip(value);
+
+                /* Valid name[=:]value pair found, call handler */
+                strncpy0(prev_name, name, sizeof(prev_name));
+                if (!HANDLER(user, section, name, value) && !error)
+                    error = lineno;
+            }
+            else if (!error) {
+                /* No '=' or ':' found on name[=:]value line */
+                error = lineno;
+            }
+        }
+
+#if INI_STOP_ON_FIRST_ERROR
+        if (error)
+            break;
+#endif
+    }
+
+#if !INI_USE_STACK
+    free(line);
+#endif
+
+    return error;
+}
+
+/* See documentation in header file. */
+int ini_parse_file(FILE* file, ini_handler handler, void* user)
+{
+    return ini_parse_stream((ini_reader)fgets, file, handler, user);
+}
+
+/* See documentation in header file. */
+int ini_parse(const char* filename, ini_handler handler, void* user)
+{
+    FILE* file;
+    int error;
+
+    file = fopen(filename, "r");
+    if (!file)
+        return -1;
+    error = ini_parse_file(file, handler, user);
+    fclose(file);
+    return error;
+}
+
+/* An ini_reader function to read the next line from a string buffer. This
+   is the fgets() equivalent used by ini_parse_string(). */
+static char* ini_reader_string(char* str, int num, void* stream) {
+    ini_parse_string_ctx* ctx = (ini_parse_string_ctx*)stream;
+    const char* ctx_ptr = ctx->ptr;
+    size_t ctx_num_left = ctx->num_left;
+    char* strp = str;
+    char c;
+
+    if (ctx_num_left == 0 || num < 2)
+        return NULL;
+
+    while (num > 1 && ctx_num_left != 0) {
+        c = *ctx_ptr++;
+        ctx_num_left--;
+        *strp++ = c;
+        if (c == '\n')
+            break;
+        num--;
+    }
+
+    *strp = '\0';
+    ctx->ptr = ctx_ptr;
+    ctx->num_left = ctx_num_left;
+    return str;
+}
+
+/* See documentation in header file. */
+int ini_parse_string(const char* string, ini_handler handler, void* user) {
+    ini_parse_string_ctx ctx;
+
+    ctx.ptr = string;
+    ctx.num_left = strlen(string);
+    return ini_parse_stream((ini_reader)ini_reader_string, &ctx, handler,
+                            user);
+}

stratosphere/loader/source/ini.h

@@ -0,0 +1,130 @@
+/* inih -- simple .INI file parser
+
+inih is released under the New BSD license (see LICENSE.txt). Go to the project
+home page for more info:
+
+https://github.com/benhoyt/inih
+
+*/
+
+#ifndef __INI_H__
+#define __INI_H__
+
+/* Make this header file easier to include in C++ code */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdio.h>
+
+/* Nonzero if ini_handler callback should accept lineno parameter. */
+#ifndef INI_HANDLER_LINENO
+#define INI_HANDLER_LINENO 0
+#endif
+
+/* Typedef for prototype of handler function. */
+#if INI_HANDLER_LINENO
+typedef int (*ini_handler)(void* user, const char* section,
+                           const char* name, const char* value,
+                           int lineno);
+#else
+typedef int (*ini_handler)(void* user, const char* section,
+                           const char* name, const char* value);
+#endif
+
+/* Typedef for prototype of fgets-style reader function. */
+typedef char* (*ini_reader)(char* str, int num, void* stream);
+
+/* Parse given INI-style file. May have [section]s, name=value pairs
+   (whitespace stripped), and comments starting with ';' (semicolon). Section
+   is "" if name=value pair parsed before any section heading. name:value
+   pairs are also supported as a concession to Python's configparser.
+
+   For each name=value pair parsed, call handler function with given user
+   pointer as well as section, name, and value (data only valid for duration
+   of handler call). Handler should return nonzero on success, zero on error.
+
+   Returns 0 on success, line number of first error on parse error (doesn't
+   stop on first error), -1 on file open error, or -2 on memory allocation
+   error (only when INI_USE_STACK is zero).
+*/
+int ini_parse(const char* filename, ini_handler handler, void* user);
+
+/* Same as ini_parse(), but takes a FILE* instead of filename. This doesn't
+   close the file when it's finished -- the caller must do that. */
+int ini_parse_file(FILE* file, ini_handler handler, void* user);
+
+/* Same as ini_parse(), but takes an ini_reader function pointer instead of
+   filename. Used for implementing custom or string-based I/O (see also
+   ini_parse_string). */
+int ini_parse_stream(ini_reader reader, void* stream, ini_handler handler,
+                     void* user);
+
+/* Same as ini_parse(), but takes a zero-terminated string with the INI data
+instead of a file. Useful for parsing INI data from a network socket or
+already in memory. */
+int ini_parse_string(const char* string, ini_handler handler, void* user);
+
+/* Nonzero to allow multi-line value parsing, in the style of Python's
+   configparser. If allowed, ini_parse() will call the handler with the same
+   name for each subsequent line parsed. */
+#ifndef INI_ALLOW_MULTILINE
+#define INI_ALLOW_MULTILINE 1
+#endif
+
+/* Nonzero to allow a UTF-8 BOM sequence (0xEF 0xBB 0xBF) at the start of
+   the file. See http://code.google.com/p/inih/issues/detail?id=21 */
+#ifndef INI_ALLOW_BOM
+#define INI_ALLOW_BOM 1
+#endif
+
+/* Chars that begin a start-of-line comment. Per Python configparser, allow
+   both ; and # comments at the start of a line by default. */
+#ifndef INI_START_COMMENT_PREFIXES
+#define INI_START_COMMENT_PREFIXES ";#"
+#endif
+
+/* Nonzero to allow inline comments (with valid inline comment characters
+   specified by INI_INLINE_COMMENT_PREFIXES). Set to 0 to turn off and match
+   Python 3.2+ configparser behaviour. */
+#ifndef INI_ALLOW_INLINE_COMMENTS
+#define INI_ALLOW_INLINE_COMMENTS 1
+#endif
+#ifndef INI_INLINE_COMMENT_PREFIXES
+#define INI_INLINE_COMMENT_PREFIXES ";"
+#endif
+
+/* Nonzero to use stack for line buffer, zero to use heap (malloc/free). */
+#ifndef INI_USE_STACK
+#define INI_USE_STACK 1
+#endif
+
+/* Maximum line length for any line in INI file (stack or heap). Note that
+   this must be 3 more than the longest line (due to '\r', '\n', and '\0'). */
+#ifndef INI_MAX_LINE
+#define INI_MAX_LINE 200
+#endif
+
+/* Nonzero to allow heap line buffer to grow via realloc(), zero for a
+   fixed-size buffer of INI_MAX_LINE bytes. Only applies if INI_USE_STACK is
+   zero. */
+#ifndef INI_ALLOW_REALLOC
+#define INI_ALLOW_REALLOC 0
+#endif
+
+/* Initial size in bytes for heap line buffer. Only applies if INI_USE_STACK
+   is zero. */
+#ifndef INI_INITIAL_ALLOC
+#define INI_INITIAL_ALLOC 200
+#endif
+
+/* Stop parsing on first error (default is to keep parsing). */
+#ifndef INI_STOP_ON_FIRST_ERROR
+#define INI_STOP_ON_FIRST_ERROR 0
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __INI_H__ */

stratosphere/loader/source/ldr_content_management.cpp

@@ -14,19 +14,32 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  
+#include <cstring>
 #include <switch.h>
-#include <string.h>
+#include <strings.h>
 #include <vector>
 #include <algorithm>
 
 #include "ldr_registration.hpp"
 #include "ldr_content_management.hpp"
+#include "ldr_hid.hpp"
+
+
+#include "ini.h"
 
 static FsFileSystem g_CodeFileSystem = {0};
+static FsFileSystem g_HblFileSystem = {0};
 
 static std::vector<u64> g_created_titles;
 static bool g_has_initialized_fs_dev = false;
 
+/* Default to Key R, hold disables override, HBL at atmosphere/hbl.nsp. */
+static bool g_mounted_hbl_nsp = false;
+static char g_hbl_sd_path[FS_MAX_PATH+1] = "@Sdcard:/atmosphere/hbl.nsp\x00";
+static u64 g_override_key_combination = KEY_R;
+static bool g_override_by_default = true;
+static u64 g_override_hbl_tid = 0x010000000000100D;
+
 Result ContentManagement::MountCode(u64 tid, FsStorageId sid) {
     char path[FS_MAX_PATH] = {0};
     Result rc;
@@ -36,10 +49,9 @@ Result ContentManagement::MountCode(u64 tid, FsStorageId sid) {
         TryMountSdCard();
     }
     
-    if (kernelAbove200() && g_has_initialized_fs_dev && R_SUCCEEDED(MountCodeNspOnSd(tid))) {
+    if (ShouldOverrideContents() && R_SUCCEEDED(MountCodeNspOnSd(tid))) {
         return 0x0;
     }
-
         
     if (R_FAILED(rc = ResolveContentPath(path, tid, sid))) {
         return rc;
@@ -63,23 +75,44 @@ Result ContentManagement::MountCode(u64 tid, FsStorageId sid) {
     }
     
     fsdevMountDevice("code", g_CodeFileSystem);
+    TryMountHblNspOnSd();
     
     fsldrExit();
     return rc;
 }
 
 Result ContentManagement::UnmountCode() {
+    if (g_mounted_hbl_nsp) {
+        fsdevUnmountDevice("hbl");
+        g_mounted_hbl_nsp = false;
+    }
     fsdevUnmountDevice("code");
     return 0;
 }
 
+
+void ContentManagement::TryMountHblNspOnSd() {
+    char path[FS_MAX_PATH+1] = {0};
+    strncpy(path, g_hbl_sd_path, FS_MAX_PATH);
+    for (unsigned int i = 0; i < FS_MAX_PATH && path[i] != '\x00'; i++) {
+        if (path[i] == '\\') {
+            path[i] = '/';
+        }
+    }
+    if (g_has_initialized_fs_dev && !g_mounted_hbl_nsp && R_SUCCEEDED(fsOpenFileSystemWithId(&g_HblFileSystem, 0, FsFileSystemType_ApplicationPackage, path))) {   
+        fsdevMountDevice("hbl", g_HblFileSystem);
+        g_mounted_hbl_nsp = true;
+    }
+}
+
 Result ContentManagement::MountCodeNspOnSd(u64 tid) {
     char path[FS_MAX_PATH+1] = {0};
     snprintf(path, FS_MAX_PATH, "@Sdcard:/atmosphere/titles/%016lx/exefs.nsp", tid); 
     Result rc = fsOpenFileSystemWithId(&g_CodeFileSystem, 0, FsFileSystemType_ApplicationPackage, path);
     
-    if (R_SUCCEEDED(rc)) {   
+    if (R_SUCCEEDED(rc)) {
         fsdevMountDevice("code", g_CodeFileSystem);
+        TryMountHblNspOnSd();
     }
     
     return rc;
@@ -158,6 +191,94 @@ void ContentManagement::SetCreatedTitle(u64 tid) {
     }
 }
 
+static int LoaderIniHandler(void *user, const char *section, const char *name, const char *value) {
+    /* Taken and modified, with love, from Rajkosto's implementation. */
+    if (strcasecmp(section, "config") == 0) {
+        if (strcasecmp(name, "hbl_tid") == 0) {
+            u64 override_tid = strtoul(value, NULL, 16);
+            if (override_tid != 0) {
+                g_override_hbl_tid = override_tid;
+            }
+        } else if (strcasecmp(name, "hbl_path") == 0) {
+            while (*value == '/' || *value == '\\') {
+                value++;
+            }
+            snprintf(g_hbl_sd_path, FS_MAX_PATH, "@Sdcard:/%s", value);
+            g_hbl_sd_path[FS_MAX_PATH] = 0;
+        } else if (strcasecmp(name, "override_key") == 0) {
+            if (value[0] == '!') {
+                g_override_by_default = true;
+                value++;
+            } else {
+                g_override_by_default = false;
+            }
+            
+            if (strcasecmp(value, "A") == 0) {
+                g_override_key_combination = KEY_A;
+            } else if (strcasecmp(value, "B") == 0) {
+                g_override_key_combination = KEY_B;
+            } else if (strcasecmp(value, "X") == 0) {
+                g_override_key_combination = KEY_X;
+            } else if (strcasecmp(value, "Y") == 0) {
+                g_override_key_combination = KEY_Y;
+            } else if (strcasecmp(value, "LS") == 0) {
+                g_override_key_combination = KEY_LSTICK;
+            } else if (strcasecmp(value, "RS") == 0) {
+                g_override_key_combination = KEY_RSTICK;
+            } else if (strcasecmp(value, "L") == 0) {
+                g_override_key_combination = KEY_L;
+            } else if (strcasecmp(value, "R") == 0) {
+                g_override_key_combination = KEY_R;
+            } else if (strcasecmp(value, "ZL") == 0) {
+                g_override_key_combination = KEY_ZL;
+            } else if (strcasecmp(value, "ZR") == 0) {
+                g_override_key_combination = KEY_ZR;
+            } else if (strcasecmp(value, "PLUS") == 0) {
+                g_override_key_combination = KEY_PLUS;
+            } else if (strcasecmp(value, "MINUS") == 0) {
+                g_override_key_combination = KEY_MINUS;
+            } else if (strcasecmp(value, "DLEFT") == 0) {
+                g_override_key_combination = KEY_DLEFT;
+            } else if (strcasecmp(value, "DUP") == 0) {
+                g_override_key_combination = KEY_DUP;
+            } else if (strcasecmp(value, "DRIGHT") == 0) {
+                g_override_key_combination = KEY_DRIGHT;
+            } else if (strcasecmp(value, "DDOWN") == 0) {
+                g_override_key_combination = KEY_DDOWN;
+            } else if (strcasecmp(value, "SL") == 0) {
+                g_override_key_combination = KEY_SL;
+            } else if (strcasecmp(value, "SR") == 0) {
+                g_override_key_combination = KEY_SR;
+            } else {
+                g_override_key_combination = 0;
+            }
+        }
+    } else {
+        return 0;
+    }
+    return 1;
+}
+
+void ContentManagement::LoadConfiguration(FILE *config) {
+    if (config == NULL) {
+        return;
+    }
+    
+    char *config_str = new char[0x800];
+    if (config_str != NULL) {
+        /* Read in string. */
+        std::fill(config_str, config_str + FS_MAX_PATH, 0);
+        fread(config_str, 1, 0x7FF, config);
+        config_str[strlen(config_str)] = 0x0;
+        
+        ini_parse_string(config_str, LoaderIniHandler, NULL);
+        
+        delete[] config_str;
+    }
+    
+    fclose(config);
+}
+
 void ContentManagement::TryMountSdCard() {
     /* Mount SD card, if psc, bus, and pcv have been created. */
     if (!g_has_initialized_fs_dev && HasCreatedTitle(0x0100000000000021) && HasCreatedTitle(0x010000000000000A) && HasCreatedTitle(0x010000000000001A)) {
@@ -172,7 +293,23 @@ void ContentManagement::TryMountSdCard() {
         }
         
         if (R_SUCCEEDED(fsdevMountSdmc())) {
+            ContentManagement::LoadConfiguration(fopen("sdmc:/atmosphere/loader.ini", "r"));
             g_has_initialized_fs_dev = true;
         }
     }
 }
+
+bool ContentManagement::ShouldReplaceWithHBL(u64 tid) {
+    return g_mounted_hbl_nsp && tid == g_override_hbl_tid;
+}
+
+bool ContentManagement::ShouldOverrideContents() {
+    if (HasCreatedTitle(0x0100000000001000)) {
+        u64 kDown = 0;
+        bool keys_triggered = (R_SUCCEEDED(HidManagement::GetKeysDown(&kDown)) && ((kDown & g_override_key_combination) != 0));
+        return g_has_initialized_fs_dev && (g_override_by_default ^ keys_triggered);
+    } else {
+        /* Always redirect before qlaunch. */
+        return g_has_initialized_fs_dev;
+    }
+}

stratosphere/loader/source/ldr_content_management.hpp

@@ -23,6 +23,7 @@ class ContentManagement {
     public:
         static Result MountCode(u64 tid, FsStorageId sid);
         static Result MountCodeNspOnSd(u64 tid);
+        static void TryMountHblNspOnSd();
         static Result UnmountCode();
         static Result MountCodeForTidSid(Registration::TidSid *tid_sid);
 
@@ -33,5 +34,9 @@ class ContentManagement {
         
         static bool HasCreatedTitle(u64 tid);
         static void SetCreatedTitle(u64 tid);
+        static void LoadConfiguration(FILE *config);
         static void TryMountSdCard();
+        
+        static bool ShouldReplaceWithHBL(u64 tid);
+        static bool ShouldOverrideContents();
 };

stratosphere/loader/source/ldr_hid.cpp

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/>.
+ */
+ 
+#include <switch.h>
+#include <string.h>
+
+#include "ldr_content_management.hpp"
+#include "ldr_hid.hpp"
+
+static bool g_has_opened_hid_session = false;
+
+Result HidManagement::GetKeysDown(u64 *keys) {
+    if (!ContentManagement::HasCreatedTitle(0x0100000000000013) || R_FAILED(hidInitialize())) {
+        return MAKERESULT(Module_Libnx, LibnxError_InitFail_HID);
+    }
+    
+    hidScanInput();
+    *keys = hidKeysDown(CONTROLLER_P1_AUTO);
+    
+    hidExit();
+    return 0x0;
+}

stratosphere/loader/source/ldr_hid.hpp

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/>.
+ */
+ 
+#pragma once
+#include <switch.h>
+
+class HidManagement {
+    public:
+        static Result GetKeysDown(u64 *keys);
+};

stratosphere/loader/source/ldr_npdm.cpp

@@ -19,8 +19,10 @@
 #include <cstdio>
 #include "ldr_npdm.hpp"
 #include "ldr_registration.hpp"
+#include "ldr_content_management.hpp"
 
 static NpdmUtils::NpdmCache g_npdm_cache = {0};
+static NpdmUtils::NpdmCache g_original_npdm_cache = {0};
 static char g_npdm_path[FS_MAX_PATH] = {0};
 
 Result NpdmUtils::LoadNpdmFromCache(u64 tid, NpdmInfo *out) {
@@ -31,6 +33,12 @@ Result NpdmUtils::LoadNpdmFromCache(u64 tid, NpdmInfo *out) {
     return 0;
 }
 
+FILE *NpdmUtils::OpenNpdmFromHBL() {
+    std::fill(g_npdm_path, g_npdm_path + FS_MAX_PATH, 0);
+    snprintf(g_npdm_path, FS_MAX_PATH, "hbl:/main.npdm");
+    return fopen(g_npdm_path, "rb");
+}
+
 FILE *NpdmUtils::OpenNpdmFromExeFS() {
     std::fill(g_npdm_path, g_npdm_path + FS_MAX_PATH, 0);
     snprintf(g_npdm_path, FS_MAX_PATH, "code:/main.npdm");
@@ -45,20 +53,23 @@ FILE *NpdmUtils::OpenNpdmFromSdCard(u64 title_id) {
 
 
 FILE *NpdmUtils::OpenNpdm(u64 title_id) {
-    FILE *f_out = OpenNpdmFromSdCard(title_id);
-    if (f_out != NULL) {
-        return f_out;
+    if (ContentManagement::ShouldOverrideContents()) {
+        if (ContentManagement::ShouldReplaceWithHBL(title_id)) {
+            return OpenNpdmFromHBL();
+        }
+        FILE *f_out = OpenNpdmFromSdCard(title_id);
+        if (f_out != NULL) {
+            return f_out;
+        }
     }
     return OpenNpdmFromExeFS();
 }
 
-Result NpdmUtils::LoadNpdm(u64 tid, NpdmInfo *out) {
+Result NpdmUtils::LoadNpdmInternal(FILE *f_npdm, NpdmUtils::NpdmCache *cache) {
     Result rc;
     
-    g_npdm_cache.info = (const NpdmUtils::NpdmInfo){0};
-    
-    FILE *f_npdm = OpenNpdm(tid);
-    
+    cache->info = (const NpdmUtils::NpdmInfo){0};
+
     rc = 0x202;
     if (f_npdm == NULL) {
         /* For generic "Couldn't open the file" error, just say the file doesn't exist. */
@@ -70,7 +81,7 @@ Result NpdmUtils::LoadNpdm(u64 tid, NpdmInfo *out) {
     fseek(f_npdm, 0, SEEK_SET);
     
     rc = 0x609;
-    if ((npdm_size > sizeof(g_npdm_cache.buffer)) || (fread(g_npdm_cache.buffer, 1, npdm_size, f_npdm) != npdm_size)) {
+    if ((npdm_size > sizeof(cache->buffer)) || (fread(cache->buffer, 1, npdm_size, f_npdm) != npdm_size)) {
         fclose(f_npdm);
         return rc;
     }
@@ -83,8 +94,8 @@ Result NpdmUtils::LoadNpdm(u64 tid, NpdmInfo *out) {
     }
     
     /* For ease of access... */
-    g_npdm_cache.info.header = (NpdmUtils::NpdmHeader *)(g_npdm_cache.buffer);
-    NpdmInfo *info = &g_npdm_cache.info;
+    cache->info.header = (NpdmUtils::NpdmHeader *)(cache->buffer);
+    NpdmInfo *info = &cache->info;
     
     if (info->header->magic != MAGIC_META) {
         return rc;
@@ -98,7 +109,7 @@ Result NpdmUtils::LoadNpdm(u64 tid, NpdmInfo *out) {
         return rc;
     }
     
-    info->aci0 = (NpdmAci0 *)(g_npdm_cache.buffer + info->header->aci0_offset);
+    info->aci0 = (NpdmAci0 *)(cache->buffer + info->header->aci0_offset);
     
     if (info->aci0->magic != MAGIC_ACI0) {
         return rc;
@@ -126,7 +137,7 @@ Result NpdmUtils::LoadNpdm(u64 tid, NpdmInfo *out) {
         return rc;
     }
     
-    info->acid = (NpdmAcid *)(g_npdm_cache.buffer + info->header->acid_offset);
+    info->acid = (NpdmAcid *)(cache->buffer + info->header->acid_offset);
     
     if (info->acid->magic != MAGIC_ACID) {
         return rc;
@@ -152,7 +163,48 @@ Result NpdmUtils::LoadNpdm(u64 tid, NpdmInfo *out) {
     
     info->acid_kac = (void *)((uintptr_t)info->acid + info->acid->kac_offset);
     
+    rc = 0;
+    return rc;
+}
+
+Result NpdmUtils::LoadNpdm(u64 tid, NpdmInfo *out) {
+    Result rc;
+        
+    rc = LoadNpdmInternal(OpenNpdm(tid), &g_npdm_cache);
     
+    if (R_FAILED(rc)) {
+        return rc;
+    }
+    
+    NpdmInfo *info = &g_npdm_cache.info;
+    /* Override the ACID/ACI0 title ID, in order to facilitate HBL takeover of any title. */
+    info->acid->title_id_range_min = tid;
+    info->acid->title_id_range_max = tid;
+    info->aci0->title_id = tid;
+    
+    if (ContentManagement::ShouldOverrideContents() && ContentManagement::ShouldReplaceWithHBL(tid) 
+        && R_SUCCEEDED(LoadNpdmInternal(OpenNpdmFromExeFS(), &g_original_npdm_cache))) {
+        NpdmInfo *original_info = &g_original_npdm_cache.info;
+        /* Fix pool partition. */
+        if (kernelAbove500()) {
+            info->acid->flags = (info->acid->flags & 0xFFFFFFF9) | (original_info->acid->flags & 0x00000006);
+        }
+        /* Fix application type. */
+        const u32 original_application_type = GetApplicationType((u32 *)original_info->aci0_kac, original_info->aci0->kac_size/sizeof(u32)) & 7;
+        u32 *caps = (u32 *)info->aci0_kac;
+        for (unsigned int i = 0; i < info->aci0->kac_size/sizeof(u32); i++) {
+            if ((caps[i] & 0x3FFF) == 0x1FFF) {
+                caps[i] = (caps[i] & 0xFFFE3FFF) | (original_application_type << 14);
+            }
+        }
+        caps = (u32 *)info->acid_kac;
+        for (unsigned int i = 0; i < info->acid->kac_size/sizeof(u32); i++) {
+            if ((caps[i] & 0x3FFF) == 0x1FFF) {
+                caps[i] = (caps[i] & 0xFFFE3FFF) | (original_application_type << 14);
+            }
+        }
+    }
+        
     /* We validated! */
     info->title_id = tid;
     *out = *info;

stratosphere/loader/source/ldr_npdm.hpp

@@ -50,7 +50,7 @@ class NpdmUtils {
             u32 magic;
             u32 size;
             u32 _0x208;
-            u32 is_retail;
+            u32 flags;
             u64 title_id_range_min;
             u64 title_id_range_max;
             u32 fac_offset;
@@ -101,9 +101,12 @@ class NpdmUtils {
         static Result ValidateCapabilities(u32 *acid_caps, size_t num_acid_caps, u32 *aci0_caps, size_t num_aci0_caps);
         
         
+        static FILE *OpenNpdmFromHBL();
         static FILE *OpenNpdmFromExeFS();
         static FILE *OpenNpdmFromSdCard(u64 tid);
         static FILE *OpenNpdm(u64 tid);
         static Result LoadNpdm(u64 tid, NpdmInfo *out);
         static Result LoadNpdmFromCache(u64 tid, NpdmInfo *out);
+    private:
+        static Result LoadNpdmInternal(FILE *f_npdm, NpdmCache *cache);
 };

stratosphere/loader/source/ldr_nso.cpp

@@ -24,12 +24,19 @@
 #include "ldr_map.hpp"
 #include "ldr_random.hpp"
 #include "ldr_patcher.hpp"
+#include "ldr_content_management.hpp"
 
 static NsoUtils::NsoHeader g_nso_headers[NSO_NUM_MAX] = {0};
 static bool g_nso_present[NSO_NUM_MAX] = {0};
 
 static char g_nso_path[FS_MAX_PATH] = {0};
 
+FILE *NsoUtils::OpenNsoFromHBL(unsigned int index) {
+    std::fill(g_nso_path, g_nso_path + FS_MAX_PATH, 0);
+    snprintf(g_nso_path, FS_MAX_PATH, "hbl:/%s", NsoUtils::GetNsoFileName(index));
+    return fopen(g_nso_path, "rb");
+}
+
 FILE *NsoUtils::OpenNsoFromExeFS(unsigned int index) {
     std::fill(g_nso_path, g_nso_path + FS_MAX_PATH, 0);
     snprintf(g_nso_path, FS_MAX_PATH, "code:/%s", NsoUtils::GetNsoFileName(index));
@@ -54,14 +61,18 @@ bool NsoUtils::CheckNsoStubbed(unsigned int index, u64 title_id) {
 }
 
 FILE *NsoUtils::OpenNso(unsigned int index, u64 title_id) {
-    FILE *f_out = OpenNsoFromSdCard(index, title_id);
-    if (f_out != NULL) {
-        return f_out;
-    } else if (CheckNsoStubbed(index, title_id)) {
-        return NULL;
-    } else {
-        return OpenNsoFromExeFS(index);
+    if (ContentManagement::ShouldOverrideContents()) {
+        if (ContentManagement::ShouldReplaceWithHBL(title_id)) {
+            return OpenNsoFromHBL(index);
+        }
+        FILE *f_out = OpenNsoFromSdCard(index, title_id);
+        if (f_out != NULL) {
+            return f_out;
+        } else if (CheckNsoStubbed(index, title_id)) {
+            return NULL;
+        }
     }
+    return OpenNsoFromExeFS(index);
 }
 
 bool NsoUtils::IsNsoPresent(unsigned int index) {

stratosphere/loader/source/ldr_nso.hpp

@@ -97,6 +97,7 @@ class NsoUtils {
             }
         }
         
+        static FILE *OpenNsoFromHBL(unsigned int index);
         static FILE *OpenNsoFromExeFS(unsigned int index);
         static FILE *OpenNsoFromSdCard(unsigned int index, u64 title_id);
         static bool CheckNsoStubbed(unsigned int index, u64 title_id);

stratosphere/loader/source/ldr_process_creation.cpp

@@ -24,15 +24,6 @@
 #include "ldr_npdm.hpp"
 #include "ldr_nso.hpp"
 
-extern "C" {
-    
-    bool __attribute__((weak)) kernelAbove600(void) {
-        u64 tmp;
-        return (svcGetInfo(&tmp, 21, INVALID_HANDLE, 0) != 0xF001);
-    }
-    
-}
-
 Result ProcessCreation::InitializeProcessInfo(NpdmUtils::NpdmInfo *npdm, Handle reslimit_h, u64 arg_flags, ProcessInfo *out_proc_info) {
     /* Initialize a ProcessInfo using an npdm. */
     *out_proc_info = (const ProcessCreation::ProcessInfo){0};
@@ -87,7 +78,7 @@ Result ProcessCreation::InitializeProcessInfo(NpdmUtils::NpdmInfo *npdm, Handle
     
     /* 5.0.0+ Pool Partition. */
     if (kernelAbove500()) {
-        u32 pool_partition_id = (npdm->acid->is_retail >> 2) & 0xF;
+        u32 pool_partition_id = (npdm->acid->flags >> 2) & 0xF;
         switch (pool_partition_id) {
             case 0: /* Application. */
                 if ((application_type & 3) == 2) {