diff --git a/orbis-kernel/include/orbis/sys/sysproto.hpp b/orbis-kernel/include/orbis/sys/sysproto.hpp
index 513367f3..9e9bdd99 100644
--- a/orbis-kernel/include/orbis/sys/sysproto.hpp
+++ b/orbis-kernel/include/orbis/sys/sysproto.hpp
@@ -676,8 +676,8 @@ SysResult sys_obs_eport_close(Thread *thread /* TODO */);
 SysResult sys_is_in_sandbox(Thread *thread /* TODO */);
 SysResult sys_dmem_container(Thread *thread);
 SysResult sys_get_authinfo(Thread *thread, pid_t pid, ptr<void> info);
-SysResult sys_mname(Thread *thread, ptr<void> address, uint64_t length,
-                    ptr<const char> name);
+SysResult sys_mname(Thread *thread, uint64_t address, uint64_t length,
+                    ptr<const char[32]> name);
 SysResult sys_dynlib_dlopen(Thread *thread /* TODO */);
 SysResult sys_dynlib_dlclose(Thread *thread /* TODO */);
 SysResult sys_dynlib_dlsym(Thread *thread, SceKernelModule handle,
diff --git a/orbis-kernel/include/orbis/thread/Process.hpp b/orbis-kernel/include/orbis/thread/Process.hpp
index e3947b36..89856de0 100644
--- a/orbis-kernel/include/orbis/thread/Process.hpp
+++ b/orbis-kernel/include/orbis/thread/Process.hpp
@@ -22,6 +22,18 @@ struct NamedObjInfo {
   uint16_t ty;
 };
 
+struct NamedMemoryRange {
+  uint64_t begin, end;
+
+  constexpr bool operator<(const NamedMemoryRange &rhs) const {
+    return end <= rhs.begin;
+  }
+
+  constexpr bool operator<(const void *ptr) const {
+    return end <= reinterpret_cast<uint64_t>(ptr);
+  }
+};
+
 struct Process final {
   KernelContext *context = nullptr;
   pid_t pid = -1;
@@ -49,5 +61,9 @@ struct Process final {
   utils::shared_mutex namedObjMutex;
   utils::kmap<void *, utils::kstring> namedObjNames;
   utils::OwningIdMap<NamedObjInfo, uint, 65535, 1> namedObjIds;
+
+  // Named memory ranges for debugging
+  utils::shared_mutex namedMemMutex;
+  utils::kmap<NamedMemoryRange, utils::kstring> namedMem;
 };
 } // namespace orbis
diff --git a/orbis-kernel/src/KernelContext.cpp b/orbis-kernel/src/KernelContext.cpp
index 1ffbda47..c88814ad 100644
--- a/orbis-kernel/src/KernelContext.cpp
+++ b/orbis-kernel/src/KernelContext.cpp
@@ -1,5 +1,6 @@
 #include "orbis/KernelContext.hpp"
 #include "orbis/thread/Process.hpp"
+#include "orbis/utils/Logs.hpp"
 #include <sys/mman.h>
 #include <sys/unistd.h>
 
@@ -182,4 +183,11 @@ void *kalloc(std::size_t size, std::size_t align) {
   return g_context.kalloc(size, align);
 }
 } // namespace utils
+
+inline namespace logs {
+template <>
+void log_class_string<kstring>::format(std::string &out, const void *arg) {
+  out += get_object(arg);
+}
+} // namespace logs
 } // namespace orbis
diff --git a/orbis-kernel/src/sys/sys_sce.cpp b/orbis-kernel/src/sys/sys_sce.cpp
index b1be4c45..e8880609 100644
--- a/orbis-kernel/src/sys/sys_sce.cpp
+++ b/orbis-kernel/src/sys/sys_sce.cpp
@@ -460,10 +460,32 @@ orbis::SysResult orbis::sys_get_authinfo(Thread *thread, pid_t pid,
 
   return {};
 }
-orbis::SysResult orbis::sys_mname(Thread *thread, ptr<void> address,
-                                  uint64_t length, ptr<const char> name) {
-  std::printf("sys_mname(%p, %p, '%s')\n", address, (char *)address + length,
-              name);
+orbis::SysResult orbis::sys_mname(Thread *thread, uint64_t addr, uint64_t len,
+                                  ptr<const char[32]> name) {
+  ORBIS_LOG_NOTICE(__FUNCTION__, addr, len, name);
+  if (addr < 0x40000 || addr >= 0x100'0000'0000 || 0x100'0000'0000 - addr < len)
+    return ErrorCode::INVAL;
+  char _name[32];
+  if (auto result = ureadString(_name, sizeof(_name), (const char *)name);
+      result != ErrorCode{}) {
+    return result;
+  }
+
+  NamedMemoryRange range;
+  range.begin = addr & ~0x3fffull;
+  range.end = range.begin;
+  range.end += ((addr & 0x3fff) + 0x3fff + len) & ~0x3fffull;
+
+  std::lock_guard lock(thread->tproc->namedMemMutex);
+  auto [it, end] = thread->tproc->namedMem.equal_range(range);
+  while (it != end) {
+    auto [addr2, end2] = it->first;
+    auto len2 = end2 - addr2;
+    ORBIS_LOG_NOTICE("sys_mname: removed overlapped", it->second, addr2, len2);
+    it = thread->tproc->namedMem.erase(it);
+  }
+  if (!thread->tproc->namedMem.try_emplace(range, _name).second)
+    std::abort();
   return {};
 }
 orbis::SysResult orbis::sys_dynlib_dlopen(Thread *thread /* TODO */) {