kern: implement KUserPointer (and test with QueryMemory) in advance of svc dev

2020-02-20 09:05:01 -08:00
parent 9f9593e05f
commit efae01c165
17 changed files with 460 additions and 72 deletions
--- a/libraries/libmesosphere/source/svc/kern_svc_query_memory.cpp
+++ b/libraries/libmesosphere/source/svc/kern_svc_query_memory.cpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2018-2020 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 <mesosphere.hpp>
+
+namespace ams::kern::svc {
+
+    /* =============================    Common    ============================= */
+
+    namespace {
+
+        Result QueryProcessMemory(ams::svc::MemoryInfo *out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle process_handle, uintptr_t address) {
+            MESOSPHERE_LOG("%s: QueryProcessMemory(0x%08x, 0x%zx) was called\n", GetCurrentProcess().GetName(), process_handle, address);
+
+            /* Get the process. */
+            KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
+            R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
+
+            /* Query the mapping's info. */
+            KMemoryInfo info;
+            R_TRY(process->GetPageTable().QueryInfo(std::addressof(info), out_page_info, address));
+
+            /* Write output. */
+            *out_memory_info = info.GetSvcMemoryInfo();
+            return ResultSuccess();
+        }
+
+        Result QueryMemory(ams::svc::MemoryInfo *out_memory_info, ams::svc::PageInfo *out_page_info,  uintptr_t address) {
+            /* Query memory is just QueryProcessMemory on the current process. */
+            return QueryProcessMemory(out_memory_info, out_page_info, ams::svc::PseudoHandle::CurrentProcess, address);
+        }
+
+    }
+
+    /* =============================    64 ABI    ============================= */
+
+    Result QueryMemory64(KUserPointer<ams::svc::lp64::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Address address) {
+        /* Get an ams::svc::MemoryInfo for the region. */
+        ams::svc::MemoryInfo info = {};
+        R_TRY(QueryMemory(std::addressof(info), out_page_info, address));
+
+        /* Try to copy to userspace. In the 64-bit case, ams::svc::lp64::MemoryInfo is the same as ams::svc::MemoryInfo. */
+        static_assert(sizeof(ams::svc::MemoryInfo) == sizeof(ams::svc::lp64::MemoryInfo));
+        R_TRY(out_memory_info.CopyFrom(std::addressof(info)));
+
+        return ResultSuccess();
+    }
+
+    Result QueryProcessMemory64(KUserPointer<ams::svc::lp64::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle process_handle, uint64_t address) {
+        MESOSPHERE_PANIC("Stubbed SvcQueryProcessMemory64 was called.");
+    }
+
+    /* ============================= 64From32 ABI ============================= */
+
+    Result QueryMemory64From32(KUserPointer<ams::svc::ilp32::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Address address) {
+        MESOSPHERE_PANIC("Stubbed SvcQueryMemory64From32 was called.");
+    }
+
+    Result QueryProcessMemory64From32(KUserPointer<ams::svc::ilp32::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle process_handle, uint64_t address) {
+        MESOSPHERE_PANIC("Stubbed SvcQueryProcessMemory64From32 was called.");
+    }
+
+}