Make clock hook configurable

chunihook/dllmain.c

@@ -13,7 +13,6 @@
 
 #include "hook/process.h"
 
-#include "hooklib/clock.h"
 #include "hooklib/gfx.h"
 #include "hooklib/serial.h"
 #include "hooklib/spike.h"
@@ -48,8 +47,6 @@ static DWORD CALLBACK chuni_pre_startup(void)
 
     /* Hook Win32 APIs */
 
-    clock_read_hook_init();
-    clock_write_hook_init();
     gfx_hook_init();
     serial_hook_init();
 

divahook/dllmain.c

@@ -13,7 +13,6 @@
 
 #include "hook/process.h"
 
-#include "hooklib/clock.h"
 #include "hooklib/gfx.h"
 #include "hooklib/serial.h"
 #include "hooklib/spike.h"
@@ -36,7 +35,6 @@ static DWORD CALLBACK diva_pre_startup(void)
 
     /* Hook Win32 APIs */
 
-    clock_write_hook_init();
     serial_hook_init();
 
     /* Initialize emulation hooks */

hooklib/clock.h

@@ -1,4 +0,0 @@
-#pragma once
-
-void clock_read_hook_init(void);
-void clock_write_hook_init(void);

hooklib/meson.build

@@ -7,8 +7,6 @@ hooklib_lib = static_library(
         capnhook.get_variable('hook_dep'),
     ],
     sources : [
-        'clock.c',
-        'clock.h',
         'dll.c',
         'dll.h',
         'dns.c',

idzhook/dllmain.c

@@ -9,7 +9,6 @@
 
 #include "hook/process.h"
 
-#include "hooklib/clock.h"
 #include "hooklib/gfx.h"
 #include "hooklib/serial.h"
 #include "hooklib/spike.h"
@@ -35,7 +34,6 @@ static DWORD CALLBACK idz_pre_startup(void)
 
     /* Hook Win32 APIs */
 
-    clock_write_hook_init();
     serial_hook_init();
 
     /* Initialize emulation hooks */

minihook/dllmain.c

@@ -5,9 +5,9 @@
 
 #include "hook/process.h"
 
-#include "hooklib/clock.h"
 #include "hooklib/spike.h"
 
+#include "platform/clock.h"
 #include "platform/config.h"
 #include "platform/nusec.h"
 
@@ -17,17 +17,17 @@ static process_entry_t app_startup;
 
 static DWORD CALLBACK app_pre_startup(void)
 {
-    struct nusec_config nusec_cfg;
+    struct clock_config clock_cfg;
     struct ds_config ds_cfg;
+    struct nusec_config nusec_cfg;
 
     dprintf("--- Begin %s ---\n", __func__);
 
-    nusec_config_load(&nusec_cfg, L".\\segatools.ini");
+    clock_config_load(&clock_cfg, L".\\segatools.ini");
     ds_config_load(&ds_cfg, L".\\segatools.ini");
+    nusec_config_load(&nusec_cfg, L".\\segatools.ini");
 
-    // TODO make use of clock read hook configurable
-    clock_read_hook_init();
-    clock_write_hook_init();
+    clock_hook_init(&clock_cfg);
     nusec_hook_init(&nusec_cfg, "SSSS", "AAV0");
     ds_hook_init(&ds_cfg);
 

mu3hook/dllmain.c

@@ -6,7 +6,6 @@
 
 #include "hook/process.h"
 
-#include "hooklib/clock.h"
 #include "hooklib/serial.h"
 #include "hooklib/spike.h"
 
@@ -31,7 +30,6 @@ static DWORD CALLBACK mu3_pre_startup(void)
 
     /* Hook Win32 APIs */
 
-    clock_write_hook_init();
     serial_hook_init();
 
     /* Initialize emulation hooks */

platform/clock.c

@@ -1,9 +1,13 @@
 #include <windows.h>
 
+#include <assert.h>
 #include <stdint.h>
 
 #include "hook/table.h"
 
+#include "platform/clock.h"
+#include "platform/config.h"
+
 #include "util/dprintf.h"
 
 static void WINAPI my_GetSystemTimeAsFileTime(FILETIME *out);
@@ -16,13 +20,18 @@ static BOOL WINAPI my_SetTimeZoneInformation(TIME_ZONE_INFORMATION *tzinfo);
 
 static BOOL (WINAPI * next_GetSystemTimeAsFileTime)(FILETIME *out);
 static int64_t clock_current_day;
+static bool clock_time_warp;
 
-static const struct hook_symbol clock_read_hook_syms[] = {
+static const struct hook_symbol clock_base_hook_syms[] = {
     {
         .name   = "GetSystemTimeAsFileTime",
         .patch  = my_GetSystemTimeAsFileTime,
         .link   = (void **) &next_GetSystemTimeAsFileTime,
-    }, {
+    }
+};
+
+static const struct hook_symbol clock_read_hook_syms[] = {
+    {
         .name   = "GetLocalTime",
         .patch  = my_GetLocalTime,
     }, {
@@ -65,6 +74,12 @@ static void WINAPI my_GetSystemTimeAsFileTime(FILETIME *out)
     int64_t fake_jiffies_biased;
     int64_t fake_jiffies;
 
+    if (!clock_time_warp) {
+        next_GetSystemTimeAsFileTime(out);
+
+        return;
+    }
+
     if (out == NULL) {
         SetLastError(ERROR_INVALID_PARAMETER);
 
@@ -207,20 +222,39 @@ static BOOL WINAPI my_SetTimeZoneInformation(TIME_ZONE_INFORMATION *in)
     return TRUE;
 }
 
-void clock_read_hook_init(void)
+HRESULT clock_hook_init(const struct clock_config *cfg)
 {
-    hook_table_apply(
-            NULL,
-            "kernel32.dll",
-            clock_read_hook_syms,
-            _countof(clock_read_hook_syms));
-}
+    assert(cfg != NULL);
 
-void clock_write_hook_init(void)
-{
-    hook_table_apply(
-            NULL,
-            "kernel32.dll",
-            clock_write_hook_syms,
-            _countof(clock_write_hook_syms));
+    clock_time_warp = cfg->timewarp;
+
+    if (cfg->timezone || cfg->timewarp || !cfg->writeable) {
+        /* All the clock hooks require the core GSTAFT hook to be installed */
+        /* Note the ! up there btw. */
+
+        hook_table_apply(
+                NULL,
+                "kernel32.dll",
+                clock_base_hook_syms,
+                _countof(clock_base_hook_syms));
+    }
+
+    if (cfg->timezone) {
+        hook_table_apply(
+                NULL,
+                "kernel32.dll",
+                clock_read_hook_syms,
+                _countof(clock_read_hook_syms));
+    }
+
+    if (!cfg->writeable) {
+        /* Install hook if this config parameter is FALSE! */
+        hook_table_apply(
+                NULL,
+                "kernel32.dll",
+                clock_write_hook_syms,
+                _countof(clock_write_hook_syms));
+    }
+
+    return S_OK;
 }

platform/clock.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <windows.h>
+
+#include "platform/config.h"
+
+HRESULT clock_hook_init(const struct clock_config *cfg);

platform/config.c

@@ -17,6 +17,7 @@ void alls_config_load(struct alls_config *cfg, const wchar_t *filename)
     assert(filename != NULL);
 
     amvideo_config_load(&cfg->amvideo, filename);
+    clock_config_load(&cfg->clock, filename);
     dns_config_load(&cfg->dns, filename);
     hwmon_config_load(&cfg->hwmon, filename);
     misc_config_load(&cfg->misc, filename);
@@ -31,6 +32,7 @@ void nu_config_load(struct nu_config *cfg, const wchar_t *filename)
     assert(filename != NULL);
 
     amvideo_config_load(&cfg->amvideo, filename);
+    clock_config_load(&cfg->clock, filename);
     dns_config_load(&cfg->dns, filename);
     hwmon_config_load(&cfg->hwmon, filename);
     misc_config_load(&cfg->misc, filename);
@@ -46,6 +48,20 @@ void amvideo_config_load(struct amvideo_config *cfg, const wchar_t *filename)
     cfg->enable = GetPrivateProfileIntW(L"amvideo", L"enable", 1, filename);
 }
 
+void clock_config_load(struct clock_config *cfg, const wchar_t *filename)
+{
+    assert(cfg != NULL);
+    assert(filename != NULL);
+
+    cfg->timezone = GetPrivateProfileIntW(L"clock", L"timezone", 1, filename);
+    cfg->timewarp = GetPrivateProfileIntW(L"clock", L"timewarp", 0, filename);
+    cfg->writeable = GetPrivateProfileIntW(
+            L"clock",
+            L"writeable",
+            0,
+            filename);
+}
+
 void dns_config_load(struct dns_config *cfg, const wchar_t *filename)
 {
     wchar_t default_[128];

platform/config.h

@@ -10,6 +10,12 @@ struct amvideo_config {
     bool enable;
 };
 
+struct clock_config {
+    bool timezone;
+    bool timewarp;
+    bool writeable;
+};
+
 struct dns_config {
     bool enable;
     wchar_t router[128];
@@ -51,6 +57,7 @@ struct vfs_config {
 
 struct nu_config {
     struct amvideo_config amvideo;
+    struct clock_config clock;
     struct dns_config dns;
     struct hwmon_config hwmon;
     struct misc_config misc;
@@ -60,6 +67,7 @@ struct nu_config {
 
 struct alls_config {
     struct amvideo_config amvideo;
+    struct clock_config clock;
     struct dns_config dns;
     struct hwmon_config hwmon;
     struct misc_config misc;
@@ -72,6 +80,7 @@ void alls_config_load(struct alls_config *cfg, const wchar_t *filename);
 void nu_config_load(struct nu_config *cfg, const wchar_t *filename);
 
 void amvideo_config_load(struct amvideo_config *cfg, const wchar_t *filename);
+void clock_config_load(struct clock_config *cfg, const wchar_t *filename);
 void dns_config_load(struct dns_config *cfg, const wchar_t *filename);
 void hwmon_config_load(struct hwmon_config *cfg, const wchar_t *filename);
 void misc_config_load(struct misc_config *cfg, const wchar_t *filename);

platform/meson.build

@@ -9,6 +9,8 @@ platform_lib = static_library(
     sources : [
         'amvideo.c',
         'amvideo.h',
+        'clock.c',
+        'clock.h',
         'config.c',
         'config.h',
         'dns.c',

platform/platform.c

@@ -3,6 +3,7 @@
 #include <assert.h>
 
 #include "platform/amvideo.h"
+#include "platform/clock.h"
 #include "platform/config.h"
 #include "platform/dns.h"
 #include "platform/hwmon.h"
@@ -31,6 +32,12 @@ HRESULT platform_hook_init_alls(
         return hr;
     }
 
+    hr = clock_hook_init(&cfg->clock);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
     hr = dns_platform_hook_init(&cfg->dns);
 
     if (FAILED(hr)) {
@@ -85,6 +92,12 @@ HRESULT platform_hook_init_nu(
         return hr;
     }
 
+    hr = clock_hook_init(&cfg->clock);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
     hr = dns_platform_hook_init(&cfg->dns);
 
     if (FAILED(hr)) {