ro: Implement ro:dmnt

stratosphere/ro/source/ro_registration.cpp

@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2018-2019 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 <cstdio>
+#include <algorithm>
+#include <stratosphere.hpp>
+
+#include "ro_registration.hpp"
+
+/* Declare process contexts as static to this function. */
+static Registration::RoProcessContext g_process_contexts[Registration::MaxSessions] = {};
+
+Result Registration::RegisterProcess(RoProcessContext **out_context, Handle process_handle, u64 process_id) {
+    /* Check if a process context already exists. */
+    for (size_t i = 0; i < Registration::MaxSessions; i++) {
+        if (g_process_contexts[i].process_id == process_id) {
+            return ResultRoInvalidSession;
+        }
+    }
+    
+    /* Find a free process context. */
+    for (size_t i = 0; i < Registration::MaxSessions; i++) {
+        if (!g_process_contexts[i].in_use) {
+            g_process_contexts[i].process_id = process_id;
+            g_process_contexts[i].process_handle = process_handle;
+            g_process_contexts[i].in_use = true;
+            *out_context = &g_process_contexts[i];
+            return ResultSuccess;
+        }
+    }
+    
+    /* Failure to find a free context is actually an abort condition. */
+    /* TODO: Should this return an unofficial error code? */
+    std::abort();
+}
+
+void Registration::UnregisterProcess(RoProcessContext *context) {
+    if (context->process_handle != INVALID_HANDLE) {
+        for (size_t i = 0; i < Registration::MaxNrrInfos; i++) {
+            if (context->nrr_in_use[i]) {
+                UnmapNrr(context->process_handle, context->nrr_infos[i].header, context->nrr_infos[i].nrr_heap_address, context->nrr_infos[i].nrr_heap_size, context->nrr_infos[i].mapped_code_address);
+            }
+        }
+    }
+}
+
+Result Registration::GetProcessModuleInfo(u32 *out_count, LoaderModuleInfo *out_infos, size_t max_out_count, u64 process_id) {
+    size_t count = 0;
+    for (size_t sess = 0; sess < Registration::MaxSessions; sess++) {
+        if (g_process_contexts[sess].process_id == process_id) {
+            /* For convenience, helper. */
+            const RoProcessContext *context = &g_process_contexts[sess];
+
+            for (size_t i = 0; i < Registration::MaxNroInfos && count < max_out_count; i++) {
+                if (!context->nro_in_use[i]) {
+                    continue;
+                }
+
+                /* Just copy out the info. */
+                LoaderModuleInfo *out_info = &out_infos[count++];
+                memcpy(out_info->build_id, &context->nro_infos[i].module_id, sizeof(context->nro_infos[i].module_id));
+                out_info->base_address = context->nro_infos[i].base_address;
+                out_info->size = context->nro_infos[i].nro_heap_size + context->nro_infos[i].bss_heap_size;
+            }
+
+            break;
+        }
+    }
+
+    *out_count = static_cast<u32>(count);
+    return ResultSuccess;
+}
+
+Result Registration::UnmapNrr(Handle process_handle, const NrrHeader *header, u64 nrr_heap_address, u64 nrr_heap_size, u64 mapped_code_address) {
+    Result rc = svcUnmapProcessMemory((void *)header, process_handle, mapped_code_address, nrr_heap_size);
+    if (R_FAILED(rc)) {
+        return rc;
+    }
+    
+    return svcUnmapProcessCodeMemory(process_handle, mapped_code_address, nrr_heap_address, nrr_heap_size);
+}