Repair shared mod fixture linkage and validate the combined bridge

docs/MMX6_MODERN_SDK_BRIDGE.md

@@ -11,6 +11,15 @@ callbacks use the same explicit ownership restoration. The original validation
 below is historical evidence; combined source/build/game qualification is
 tracked in `beads-9zi2` and optimization campaign `beads-fobc`.
 
+The combined GCC15.2 build now passes all18 targeted runtime cases, including
+the ordinary scheduler-escape fixture, missing-profile/image checks, loader
+negotiation, modern settings profiles, own-view isolation, resident loading and
+both PGXP compilation flavors. Replacement codegen, compiled-overlay ABI35
+forwarding and interpreted-entry guard checks also pass. Fixture-only duplicate
+definitions/missing link inputs were repaired, and netplay assertions stay active
+in Release. This supersedes the historical fixture failures below for this
+combined source; built-game and two-peer qualification remain separate.
+
 This branch bridges X6's native replacement and negotiated loading services to
 modern SDK `6f0ccbc6b67fee626de6a7b0945ca3abb26332aa`. It is a local integration
 candidate, not a qualified game repin. No games or memory cards were launched.

runtime/CMakeLists.txt

@@ -987,6 +987,8 @@ if(BUILD_TESTING)
     # Run the same session fixture in both real compilation flavors.
     foreach(_pgxp_session_test IN ITEMS pgxp_session_test pgxp_session_hooks_test)
         add_executable(${_pgxp_session_test} tests/test_pgxp_session.cpp
+            src/mod_immediate.c src/func_override.c
+            src/host_overlay.c src/host_span_ring.c
             src/pgxp_session.cpp src/mod_builtin_pgxp.c src/pgxp.cpp
             src/psx_ram_geometry.c
             src/mod_runtime.cpp src/mod_function_replacements.c
@@ -1526,6 +1528,7 @@ if(BUILD_TESTING)
     add_test(NAME resident_sector_test COMMAND resident_sector_test)
     add_executable(netplay_view_mods_test
         tests/test_netplay_view_mods.cpp
+        src/mod_immediate.c src/func_override.c src/host_overlay.c
         src/iso_reader_c.cpp
         src/host_span_ring.c
         src/mod_runtime.cpp src/mod_function_replacements.c
@@ -2464,7 +2467,7 @@ endif()
 
 # Fixtures compiling the real mod runtime also need its read-only installer.
 if(BUILD_TESTING)
-    foreach(fixture pgxp_session_test mod_runtime_test netplay_view_mods_test mod_runtime_cache_test mod_resident_test)
+    foreach(fixture pgxp_session_test pgxp_session_hooks_test mod_runtime_test netplay_view_mods_test mod_runtime_cache_test mod_resident_test)
         target_sources(${fixture} PRIVATE src/texture_pack_install.cpp src/duckstation_texture_pack.cpp tests/texture_install_stb.cpp)
         target_link_libraries(${fixture} PRIVATE psx_texture_image_decode Threads::Threads)
     endforeach()

runtime/tests/test_mod_netplay.c

@@ -1,6 +1,7 @@
 #include "mod_netplay.h"
 #include "netplay_state_digest.h"
 #include "crc32.h"
+#undef NDEBUG
 #include <assert.h>
 #include <stdio.h>
 #include <string.h>

runtime/tests/test_mod_resident.cpp

@@ -56,7 +56,6 @@ extern "C" int gpu_hd_textures_reload(char*, size_t) { return 1; }
 extern "C" void psx_projection_reset_session(void) {}
 extern "C" void gpu_ws_set_native_scene_predicate(int (*)(void)) {}
 extern "C" int psx_ws_x_margin(void) { return 0; }
-extern "C" int psx_netplay_active(void) { return 0; }
 extern "C" void spu_set_pcm_overlay(PSXModPCMCallback) {}
 extern "C" void gpu_get_display_info(GpuDisplayInfo* out) { *out = GpuDisplayInfo{}; }
 extern "C" void dirty_ram_mark_executable_range(uint32_t, uint32_t) {}

runtime/tests/test_netplay_view_mods.cpp

@@ -13,6 +13,7 @@
 #include <array>
 #include <algorithm>
 #include <cstdint>
+#include <cstdlib>
 #include <filesystem>
 #include <fstream>
 #include <iostream>
@@ -61,12 +62,26 @@ int memcard_is_present(int) { return 0; }
 int memcard_read_sector(int, int, uint8_t* buf) { std::memset(buf, 0, 128); return -1; }
 int memcard_write_sector(int, int, const uint8_t*) { return -1; }
 void memcard_flush(int) {}
+int memcard_last_flush_result(int) { return -1; } /* No cards in this fixture. */
+uint64_t psx_cycle_count=0, psx_next_service_cycle=0;
+int psx_in_device_service=0, g_event_step_conservative=0, g_ls_replay_active=0;
+uint32_t g_psx_cyc_batch=0, g_psx_cyc_batch_limit=0;
+void psx_devices_service_to_now(void) { std::abort(); }
+void psx_advance_cycles_slow(uint32_t) { std::abort(); }
+void psx_dispatch_call(CPUState*, uint32_t, uint32_t) { std::abort(); }
+void spu_set_pcm_overlay(PSXModPCMCallback callback) { if (callback) std::abort(); }
 }
 
 /* The guest bus: main RAM, plus the real SIO (sio.c) at 0x1F801040..5F, so
  * a bus read of SIO_DATA / SIO_STAT has its hardware side effects here too.
  * Every MMIO bus access is counted. */
 static int mmio_bus_accesses;
+extern "C" uint32_t psx_peek_word_untraced(uint32_t address) {
+    if ((address & 0x1FFFFFFFu) >= ram.size() || (address & 3u)) std::abort();
+    uint32_t value;
+    std::memcpy(&value,ram.data()+(address & 0x1FFFFFFFu),sizeof value);
+    return value;
+}
 static bool is_sio(uint32_t a) {
     a &= 0x1fffffffu;
     return a >= 0x1F801040u && a < 0x1F801060u;

runtime/tests/test_pgxp_session.cpp

@@ -128,6 +128,18 @@ extern "C" void psx_write_word(uint32_t a, uint32_t v) {
 extern "C" void psx_host_write_byte(uint32_t a, uint8_t v) { psx_write_byte(a, v); }
 extern "C" void psx_host_write_half(uint32_t a, uint16_t v) { psx_write_half(a, v); }
 extern "C" void psx_host_write_word(uint32_t a, uint32_t v) { psx_write_word(a, v); }
+/* This fixture installs presentation policy; it never dispatches guest code,
+ * credits guest cycles, or installs an audio callback. Fail on accidental use. */
+extern "C" uint32_t psx_peek_word_untraced(uint32_t a) { return psx_read_word(a); }
+extern "C" {
+uint64_t psx_cycle_count=0, psx_next_service_cycle=0;
+int psx_in_device_service=0, g_event_step_conservative=0, g_ls_replay_active=0;
+uint32_t g_psx_cyc_batch=0, g_psx_cyc_batch_limit=0;
+void psx_devices_service_to_now(void) { std::abort(); }
+void psx_advance_cycles_slow(uint32_t) { std::abort(); }
+}
+extern "C" void psx_dispatch_call(CPUState*, uint32_t, uint32_t) { std::abort(); }
+extern "C" void spu_set_pcm_overlay(PSXModPCMCallback callback) { if (callback) std::abort(); }
 extern "C" uint32_t psx_mod_memory_alloc(uint32_t, uint32_t) { return 0; }
 extern "C" uint32_t psx_mod_gpu_dma_memory_alloc(uint32_t, uint32_t) { return 0; }
 extern "C" int psx_ws_x_margin(void) { return 0; }
@@ -143,12 +155,6 @@ extern "C" void gpu_ws_set_adaptive_backdrop_preload(int) {}
 extern "C" void psx_projection_reset_session(void) {}
 extern "C" void gpu_ws_set_native_scene_predicate(int (*)(void)) {}
 extern "C" int gpu_ws_configured_x_reveal(void) { return 0; }
-extern "C" int psx_netplay_active(void) { return 0; }
-extern "C" void gpu_hd_textures_shutdown(void) {}
-extern "C" int gpu_hd_textures_configure(const char*, int, int, char*, size_t) { return 1; }
-extern "C" void gpu_hd_textures_set_dump_enabled(int) {}
-extern "C" void gpu_hd_textures_get_diag(GpuHdTextureDiag* out) { *out = {}; }
-extern "C" int gpu_hd_textures_reload(char*, size_t) { return 1; }
 extern "C" void gpu_ws_set_manual_view_anchor(int, int) {}
 extern "C" void gpu_ws_tag_hud_prim(uint32_t, int) {}
 extern "C" void gpu_ws_tag_screen_mask_quad(uint32_t) {}