diff options
Diffstat (limited to 'na/kernel/syscall.cc')
| -rw-r--r-- | na/kernel/syscall.cc | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/na/kernel/syscall.cc b/na/kernel/syscall.cc deleted file mode 100644 index a5b80ec..0000000 --- a/na/kernel/syscall.cc +++ /dev/null @@ -1,208 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* Copyright (C) 2026 Richard Qin */ - -/* - * System Call MI Layer — Jump Table & Dispatcher - * - * O(1) function pointer array dispatch. No switch-case. - * syscall_init() registers all implemented handlers. - * - * Reference: docs/specs/syscall.md §6 - */ - -#include <lume/syscall.h> -#include <lume/syscall_nr.h> -#include <lume/errno.h> -#include <lume/kprintf.h> -#include <lume/klog.h> -#include <lume/console.h> -#include <arch/cpu.h> - -/* ====================================================================== - * Jump table - * ====================================================================== */ - -inline constexpr int kNrSyscalls = 512; - -static SyscallHandler sys_call_table[kNrSyscalls]; - -/* ====================================================================== - * MI Dispatcher - * ====================================================================== */ - -int64 syscall_dispatch(uint64 nr, uint64 args[6]) -{ - if (nr >= static_cast<uint64>(kNrSyscalls)) { - kprintf("[syscall] nr=%llu out of range\n", nr); - return -ENOSYS; - } - - /* Per-syscall entry trace. KLOG_DEBUG keeps it out of the console - * by default; enable via klog_set_level(KLOG_DEBUG) or read the - * ring buffer to investigate. Subsys mask gates this further. */ - pr_debug_s(KLOG_SUBSYS_SYSCALL, - "syscall: nr=%llu a0=%llx a1=%llx a2=%llx a3=%llx\n", - nr, args[0], args[1], args[2], args[3]); - - SyscallHandler handler = sys_call_table[nr]; - if (!handler) { - kprintf("[syscall] unimplemented nr=%llu\n", nr); - return -ENOSYS; - } - - return handler(args[0], args[1], args[2], - args[3], args[4], args[5]); -} - -/* ====================================================================== - * Forward declarations of sys_* handlers - * ====================================================================== */ - -/* sys_process.cc */ -int64 sys_exit(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_exit_group(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_getpid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_gettid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_getppid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_sched_yield_wrapper(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_clone_wrapper(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_wait4_wrapper(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_set_tid_address(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_getuid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_getgid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_nanosleep(uint64, uint64, uint64, uint64, uint64, uint64); - -/* sys_mm.cc */ -int64 sys_brk(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_mmap(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_munmap(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_mprotect(uint64, uint64, uint64, uint64, uint64, uint64); - -/* sys_info.cc */ -int64 sys_uname(uint64, uint64, uint64, uint64, uint64, uint64); - -/* sys_fs.cc */ -int64 sys_openat(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_close(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_read(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_write(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_lseek(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_fstat_wrapper(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_getdents64(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_dup(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_dup3(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_getcwd(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_chdir(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_mkdirat(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_unlinkat(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_writev(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_ioctl(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_ppoll(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_pipe2(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_fcntl(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_socket(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_sendto(uint64, uint64, uint64, uint64, uint64, uint64); - -/* sys_signal.cc */ -int64 sys_kill(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_tkill(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_tgkill(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_rt_sigaction(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_rt_sigprocmask(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_rt_sigreturn(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_rt_sigtimedwait(uint64, uint64, uint64, uint64, uint64, uint64); - -/* exec.cc */ -int64 sys_execve_wrapper(uint64, uint64, uint64, uint64, uint64, uint64); - -/* sys_misc.cc */ -int64 sys_reboot(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_prctl(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_setsid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_getsid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_setpgid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_getpgid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_geteuid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_getegid(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_sigaltstack(uint64, uint64, uint64, uint64, uint64, uint64); -int64 sys_clock_gettime(uint64, uint64, uint64, uint64, uint64, uint64); - -/* ====================================================================== - * syscall_init — register all handlers - * ====================================================================== */ - -void syscall_init() -{ - /* Zero the table (redundant for BSS, but explicit) */ - for (int i = 0; i < kNrSyscalls; i++) - sys_call_table[i] = nullptr; - - /* Phase 2: minimal runnable set */ - sys_call_table[SYS_exit] = sys_exit; - sys_call_table[SYS_exit_group] = sys_exit_group; - sys_call_table[SYS_getpid] = sys_getpid; - sys_call_table[SYS_gettid] = sys_gettid; - sys_call_table[SYS_getppid] = sys_getppid; - sys_call_table[SYS_sched_yield] = sys_sched_yield_wrapper; - sys_call_table[SYS_clone] = sys_clone_wrapper; - sys_call_table[SYS_wait4] = sys_wait4_wrapper; - sys_call_table[SYS_set_tid_address] = sys_set_tid_address; - sys_call_table[SYS_getuid] = sys_getuid; - sys_call_table[SYS_getgid] = sys_getgid; - sys_call_table[SYS_brk] = sys_brk; - sys_call_table[SYS_mmap] = sys_mmap; - sys_call_table[SYS_munmap] = sys_munmap; - sys_call_table[SYS_mprotect] = sys_mprotect; - sys_call_table[SYS_uname] = sys_uname; - - /* Phase 3: filesystem */ - sys_call_table[SYS_openat] = sys_openat; - sys_call_table[SYS_close] = sys_close; - sys_call_table[SYS_read] = sys_read; - sys_call_table[SYS_write] = sys_write; - sys_call_table[SYS_lseek] = sys_lseek; - sys_call_table[SYS_fstat] = sys_fstat_wrapper; - sys_call_table[SYS_getdents64] = sys_getdents64; - sys_call_table[SYS_dup] = sys_dup; - sys_call_table[SYS_dup3] = sys_dup3; - sys_call_table[SYS_getcwd] = sys_getcwd; - sys_call_table[SYS_chdir] = sys_chdir; - sys_call_table[SYS_mkdirat] = sys_mkdirat; - sys_call_table[SYS_unlinkat] = sys_unlinkat; - sys_call_table[SYS_writev] = sys_writev; - sys_call_table[SYS_ioctl] = sys_ioctl; - sys_call_table[SYS_ppoll] = sys_ppoll; - - /* Phase 4: signals */ - sys_call_table[SYS_kill] = sys_kill; - sys_call_table[SYS_tkill] = sys_tkill; - sys_call_table[SYS_tgkill] = sys_tgkill; - sys_call_table[SYS_rt_sigaction] = sys_rt_sigaction; - sys_call_table[SYS_rt_sigprocmask] = sys_rt_sigprocmask; - sys_call_table[SYS_rt_sigreturn] = sys_rt_sigreturn; - sys_call_table[SYS_rt_sigtimedwait] = sys_rt_sigtimedwait; - - /* Phase 5: exec */ - sys_call_table[SYS_execve] = sys_execve_wrapper; - - /* Phase 6: pipe + fcntl */ - sys_call_table[SYS_pipe2] = sys_pipe2; - sys_call_table[SYS_fcntl] = sys_fcntl; - - /* Phase 7: busybox bootstrap */ - sys_call_table[SYS_reboot] = sys_reboot; - sys_call_table[SYS_prctl] = sys_prctl; - sys_call_table[SYS_setsid] = sys_setsid; - sys_call_table[SYS_getsid] = sys_getsid; - sys_call_table[SYS_setpgid] = sys_setpgid; - sys_call_table[SYS_getpgid] = sys_getpgid; - sys_call_table[SYS_geteuid] = sys_geteuid; - sys_call_table[SYS_getegid] = sys_getegid; - sys_call_table[SYS_sigaltstack] = sys_sigaltstack; - sys_call_table[SYS_clock_gettime] = sys_clock_gettime; - sys_call_table[SYS_nanosleep] = sys_nanosleep; - sys_call_table[SYS_socket] = sys_socket; - sys_call_table[SYS_sendto] = sys_sendto; - - printk(KERN_INFO "init: syscall_init done (%d handlers registered)\n", 46); -} |