misc: Add vkGetInstanceProcAddr() entrypoint

Adding this entrypoint as this has been discussed in khronos  and is needed
for the loader/layer/extension proposal.

Caveats:
1) Have not updated layers or any tests/demos yet that will come later;
2) No one including loader is using this call yet;
3) Leaving exisitng vkGetProcAddr() as is for now; later once loader
is using vkGetInstanceProcAddr call can switch vkGetProcAddr() to
vkGetDeviceProcAddr()

3 files changed, 18 insertions, 0 deletions

diff --git a/loader/gpa_helper.h b/loader/gpa_helper.h
index b2a6f311..b9bd688b 100644
--- a/loader/gpa_helper.h
+++ b/loader/gpa_helper.h
@@ -38,6 +38,8 @@ static inline void* globalGetProcAddr(const char *name)
         return (void*) vkEnumeratePhysicalDevices;
     if (!strcmp(name, "GetPhysicalDeviceInfo"))
         return (void*) vkGetPhysicalDeviceInfo;
+    if (!strcmp(name, "GetInstanceProcAddr"))
+        return (void*) vkGetInstanceProcAddr;
     if (!strcmp(name, "GetProcAddr"))
         return (void*) vkGetProcAddr;
     if (!strcmp(name, "CreateDevice"))
@@ -312,6 +314,8 @@ static inline void *loader_non_passthrough_gpa(const char *name)
         return (void*) vkEnumeratePhysicalDevices;
     if (!strcmp(name, "GetPhysicalDeviceInfo"))
         return (void*) vkGetPhysicalDeviceInfo;
+    if (!strcmp(name, "GetInstanceProcAddr"))
+        return (void*) vkGetInstanceProcAddr;
     if (!strcmp(name, "GetProcAddr"))
         return (void*) vkGetProcAddr;
     if (!strcmp(name, "CreateDevice"))
diff --git a/loader/loader.c b/loader/loader.c
index 17778d5b..c452ce52 100644
--- a/loader/loader.c
+++ b/loader/loader.c
@@ -1288,6 +1288,17 @@ LOADER_EXPORT VkResult VKAPI vkEnumeratePhysicalDevices(
     return (count > 0) ? VK_SUCCESS : res;
 }
 
+LOADER_EXPORT void * VKAPI vkGetInstanceProcAddr(VkInstance instance, const char * pName)
+{
+    if (instance != VK_NULL_HANDLE) {
+
+        /* return entrypoint addresses that are global (in the loader)*/
+        return globalGetProcAddr(pName);
+    }
+
+    return NULL;
+}
+
 LOADER_EXPORT void * VKAPI vkGetProcAddr(VkPhysicalDevice gpu, const char * pName)
 {
     if (gpu == VK_NULL_HANDLE) {
diff --git a/loader/table_ops.h b/loader/table_ops.h
index 3a3535d2..1b59a453 100644
--- a/loader/table_ops.h
+++ b/loader/table_ops.h
@@ -35,6 +35,7 @@ static inline void loader_initialize_dispatch_table(VkLayerDispatchTable *table,
     table->DestroyInstance = (PFN_vkDestroyInstance) gpa(gpu, "vkDestroyInstance");
     table->EnumeratePhysicalDevices = (PFN_vkEnumeratePhysicalDevices) gpa(gpu, "vkEnumeratePhysicalDevices");
     table->GetPhysicalDeviceInfo = (PFN_vkGetPhysicalDeviceInfo) gpa(gpu, "vkGetPhysicalDeviceInfo");
+    table->GetInstanceProcAddr = (PFN_vkGetInstanceProcAddr) gpa(gpu, "vkGetInstanceProcAddr");
     table->GetProcAddr = (PFN_vkGetProcAddr) gpa(gpu, "vkGetProcAddr");
     table->CreateDevice = (PFN_vkCreateDevice) gpa(gpu, "vkCreateDevice");
     table->DestroyDevice = (PFN_vkDestroyDevice) gpa(gpu, "vkDestroyDevice");
@@ -176,6 +177,8 @@ static inline void *loader_lookup_dispatch_table(const VkLayerDispatchTable *tab
         return (void *) table->EnumeratePhysicalDevices;
     if (!strcmp(name, "GetPhysicalDeviceInfo"))
         return (void *) table->GetPhysicalDeviceInfo;
+    if (!strcmp(name, "GetInstanceProcAddr"))
+        return (void *) table->GetInstanceProcAddr;
     if (!strcmp(name, "GetProcAddr"))
         return (void *) table->GetProcAddr;
     if (!strcmp(name, "CreateDevice"))