From b809d8674925d3c6e6b25efa91dccc04a460a62f Mon Sep 17 00:00:00 2001
From: Luciano Ciccariello <xeeynamo@hotmail.com>
Date: Mon, 4 Mar 2024 20:41:38 +0000
Subject: [PATCH] Fix HD mode on Prime 1

---
 cmake/src/main/hook/patch/CMakeLists.txt |  1 +
 src/main/hook/patch/sysinfo.c            | 31 ++++++++++++++++++++++++
 src/main/hook/patch/sysinfo.h            |  8 ++++++
 src/main/hook/pri/main.c                 |  9 +++++++
 4 files changed, 49 insertions(+)
 create mode 100644 src/main/hook/patch/sysinfo.c
 create mode 100644 src/main/hook/patch/sysinfo.h

diff --git a/cmake/src/main/hook/patch/CMakeLists.txt b/cmake/src/main/hook/patch/CMakeLists.txt
index 9d55729..b25abd4 100644
--- a/cmake/src/main/hook/patch/CMakeLists.txt
+++ b/cmake/src/main/hook/patch/CMakeLists.txt
@@ -26,6 +26,7 @@ set(SOURCE_FILES
         ${SRC}/redir.c
         ${SRC}/sigsegv.c
         ${SRC}/sound.c
+        ${SRC}/sysinfo.c
         ${SRC}/usb-emu.c
         ${SRC}/usb-init-fix.c
         ${SRC}/usb-mnt.c
diff --git a/src/main/hook/patch/sysinfo.c b/src/main/hook/patch/sysinfo.c
new file mode 100644
index 0000000..3a8cc3b
--- /dev/null
+++ b/src/main/hook/patch/sysinfo.c
@@ -0,0 +1,31 @@
+#define LOG_MODULE "patch-sysinfo"
+
+#include <sys/sysinfo.h>
+#include <stdbool.h>
+
+#include "capnhook/hook/lib.h"
+
+#include "util/log.h"
+
+typedef int (*sysinfo_t)(struct sysinfo *info);
+
+static bool patch_sysinfo_initialized;
+static sysinfo_t patch_sysinfo_real_sysinfo;
+int sysinfo(struct sysinfo *info) {
+    if (!patch_sysinfo_real_sysinfo) {
+        patch_sysinfo_real_sysinfo = (sysinfo_t)cnh_lib_get_func_addr("sysinfo");
+    }
+
+    // Prime will not run in HD if totalram / (mem_unit * 1024) is less than 999999
+    int ret = patch_sysinfo_real_sysinfo(info);
+    info->totalram = info->totalram * info->mem_unit;
+    info->mem_unit = 1;
+
+    return ret;
+}
+
+void patch_sysinfo_init()
+{
+  patch_sysinfo_initialized = true;
+  log_info("Initialized");
+}
diff --git a/src/main/hook/patch/sysinfo.h b/src/main/hook/patch/sysinfo.h
new file mode 100644
index 0000000..f1a9441
--- /dev/null
+++ b/src/main/hook/patch/sysinfo.h
@@ -0,0 +1,8 @@
+#pragma once
+
+/**
+ * Initialize the patch module
+ *
+ * This takes care of overriding system specs
+ */
+void patch_sysinfo_init();
diff --git a/src/main/hook/pri/main.c b/src/main/hook/pri/main.c
index 9f94a62..005e30d 100644
--- a/src/main/hook/pri/main.c
+++ b/src/main/hook/pri/main.c
@@ -26,6 +26,7 @@
 #include "hook/patch/redir.h"
 #include "hook/patch/sigsegv.h"
 #include "hook/patch/sound.h"
+#include "hook/patch/sysinfo.h"
 #include "hook/patch/usb-emu.h"
 #include "hook/patch/usb-init-fix.h"
 #include "hook/patch/usb-mnt.h"
@@ -151,6 +152,13 @@ static void prihook_patch_gfx_init(struct prihook_options *options)
   }
 }
 
+static void prihook_patch_sysinfo_init(struct prihook_options *options)
+{
+  log_assert(options);
+
+  patch_sysinfo_init();
+}
+
 static void prihook_patch_main_loop_init(struct prihook_options *options)
 {
   log_assert(options);
@@ -283,6 +291,7 @@ void prihook_trap_before_main(int argc, char **argv)
   prihook_fs_redirs_init(&options, game_data_path);
   prihook_patch_fs_mounting_init();
   prihook_patch_gfx_init(&options);
+  prihook_patch_sysinfo_init(&options);
   prihook_patch_main_loop_init(&options);
   prihook_patch_sound_init(&options);
   prihook_patch_sigsegv_init(&options);