diff --git a/DevTools/UserspaceEmulator/Emulator.cpp b/DevTools/UserspaceEmulator/Emulator.cpp index cc246a267f..9f3b6acff8 100644 --- a/DevTools/UserspaceEmulator/Emulator.cpp +++ b/DevTools/UserspaceEmulator/Emulator.cpp @@ -404,6 +404,8 @@ u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3) return virt$watch_file(arg1, arg2); case SC_clock_nanosleep: return virt$clock_nanosleep(arg1); + case SC_readlink: + return virt$readlink(arg1); default: reportln("\n=={}== \033[31;1mUnimplemented syscall: {}\033[0m, {:p}", getpid(), Syscall::to_string((Syscall::Function)function), function); dump_backtrace(); @@ -1527,4 +1529,26 @@ int Emulator::virt$clock_nanosleep(FlatPtr params_addr) return rc; } +int Emulator::virt$readlink(FlatPtr params_addr) +{ + Syscall::SC_readlink_params params; + mmu().copy_from_vm(¶ms, params_addr, sizeof(params)); + + if (params.path.length > PATH_MAX) { + return -ENAMETOOLONG; + } + auto path = mmu().copy_buffer_from_vm((FlatPtr)params.path.characters, params.path.length); + char host_buffer[PATH_MAX] = {}; + size_t host_buffer_size = min(sizeof(host_buffer), params.buffer.size); + + Syscall::SC_readlink_params host_params; + host_params.path = { (const char*)path.data(), path.size() }; + host_params.buffer = { host_buffer, host_buffer_size }; + int rc = syscall(SC_readlink, &host_params); + if (rc < 0) + return rc; + mmu().copy_to_vm((FlatPtr)params.buffer.data, host_buffer, host_buffer_size); + return rc; +} + } diff --git a/DevTools/UserspaceEmulator/Emulator.h b/DevTools/UserspaceEmulator/Emulator.h index 3fb0a07ad0..764fb68bc1 100644 --- a/DevTools/UserspaceEmulator/Emulator.h +++ b/DevTools/UserspaceEmulator/Emulator.h @@ -157,6 +157,7 @@ private: int virt$set_thread_name(pid_t, FlatPtr, size_t); pid_t virt$setsid(); int virt$watch_file(FlatPtr, size_t); + int virt$readlink(FlatPtr); FlatPtr allocate_vm(size_t size, size_t alignment);