diff options
Diffstat (limited to 'kernel/sys_process.cc')
| -rw-r--r-- | kernel/sys_process.cc | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/kernel/sys_process.cc b/kernel/sys_process.cc deleted file mode 100644 index 438ad1b..0000000 --- a/kernel/sys_process.cc +++ /dev/null @@ -1,185 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* Copyright (C) 2026 Richard Qin */ - -/* - * Process Control System Calls - * - * Implements: exit, exit_group, getpid, gettid, getppid, - * sched_yield, clone (stub), wait4 (stub), - * set_tid_address, getuid, getgid. - * - * Reference: docs/specs/syscall.md §7.1 - */ - -#include "lume/klog.h" -#include <lume/types.h> -#include <lume/task.h> -#include <lume/sched.h> -#include <lume/errno.h> -#include <lume/uaccess.h> -#include <lume/wait.h> - -/* External: task lifecycle (kernel/task.cc) */ -extern void task_exit(int code); -extern int32 do_wait4(int32 wait_pid, int options, int32* exit_code); -extern int32 task_clone(arch::TrapFrame* tf, uint64 clone_flags, - uint64 child_stack, uint64 parent_tidptr, - uint64 child_tidptr, uint64 tls); -extern int32 task_fork(arch::TrapFrame* tf); - -/* ====================================================================== - * sys_exit / sys_exit_group - * ====================================================================== */ - -int64 sys_exit(uint64 code, uint64, uint64, uint64, uint64, uint64) -{ - task_exit(static_cast<int>(code & 0xFF)); - __builtin_unreachable(); -} - -int64 sys_exit_group(uint64 code, uint64, uint64, uint64, uint64, uint64) -{ - /* Phase 2: single-threaded, equivalent to sys_exit. - * Phase 3: kill all threads in tgid then exit. */ - task_exit(static_cast<int>(code & 0xFF)); - __builtin_unreachable(); -} - -/* ====================================================================== - * sys_getpid / sys_gettid / sys_getppid - * ====================================================================== */ - -int64 sys_getpid(uint64, uint64, uint64, uint64, uint64, uint64) -{ - return current_task()->tgid; /* Linux: getpid() returns tgid */ -} - -int64 sys_gettid(uint64, uint64, uint64, uint64, uint64, uint64) -{ - return current_task()->pid; /* Linux: gettid() returns real tid */ -} - -int64 sys_getppid(uint64, uint64, uint64, uint64, uint64, uint64) -{ - TaskControlBlock* parent = current_task()->parent; - return parent ? parent->tgid : 0; -} - -/* ====================================================================== - * sys_sched_yield - * ====================================================================== */ - -int64 sys_sched_yield_wrapper(uint64, uint64, uint64, uint64, uint64, uint64) -{ - sched_yield(); - return 0; -} - -int64 sys_clone_wrapper(uint64 flags, uint64 child_stack, - uint64 ptid, uint64 ctid, uint64 tls, uint64) -{ - arch::TrapFrame* tf = current_task()->trapframe; - if (!tf) return -EINVAL; - - return task_clone(tf, flags, child_stack, ptid, ctid, tls); -} - -/* ======================================================================== - * sys_wait4 — Wait for child to exit - * ======================================================================== */ - -int64 sys_wait4_wrapper(uint64 pid, uint64 wstatus_ptr, - uint64 options, uint64, uint64, uint64) -{ - int32 exit_code = 0; - int32 child_pid = do_wait4(static_cast<int32>(pid), - static_cast<int>(options), - &exit_code); - - if (child_pid < 0) return child_pid; - - /* exit_code is already in Linux wstatus format */ - if (wstatus_ptr != 0) { - if (copy_to_user(wstatus_ptr, &exit_code, sizeof(int)) < 0) - return -EFAULT; - } - - return child_pid; -} - -/* ====================================================================== - * sys_set_tid_address — musl libc calls this very early - * ====================================================================== */ - -int64 sys_set_tid_address(uint64 tidptr, uint64, uint64, - uint64, uint64, uint64) -{ - /* Store clear_child_tid pointer — on exit, kernel writes 0 here - * and does futex_wake (enables pthread_join). */ - current_task()->clear_child_tid = tidptr; - return current_task()->pid; -} - -/* ====================================================================== - * sys_getuid / sys_getgid — Phase 2: always root - * ====================================================================== */ - -int64 sys_getuid(uint64, uint64, uint64, uint64, uint64, uint64) -{ - return 0; /* root */ -} - -int64 sys_getgid(uint64, uint64, uint64, uint64, uint64, uint64) -{ - return 0; /* root */ -} - -/* ====================================================================== - * sys_nanosleep (SYS_nanosleep = 101) - * ====================================================================== */ -#include <lume/wait.h> -#include <lume/kprintf.h> -#include <lume/timer.h> - -struct linux_timespec { - int64 tv_sec; - int64 tv_nsec; -}; - -static void nanosleep_wakeup(TimerList* t) { - TaskControlBlock* task = static_cast<TaskControlBlock*>(t->data); - task->state = TaskState::Runnable; - sched_enqueue(task); -} - -int64 sys_nanosleep(uint64 req_ptr, uint64 rem_ptr, uint64, uint64, uint64, uint64) { - if (req_ptr == 0) return -EINVAL; - - linux_timespec req; - if (copy_from_user(&req, req_ptr, sizeof(req)) != 0) { - return -EFAULT; - } - - uint64 target = *(volatile uint64*)&g_jiffies + (req.tv_sec * 100) + (req.tv_nsec / 10000000); - - TaskControlBlock* curr = current_task(); - curr->state = TaskState::Sleeping; - - TimerList t; - t.init(nanosleep_wakeup); - t.expires = target; - t.data = curr; - - add_timer(&t); - - if (*(volatile uint64*)&g_jiffies < target) { - schedule(); - } else { - curr->state = TaskState::Running; - } - - - del_timer(&t); - - return 0; -} |