vasilito
b0f4fee4c4
Phase II.X.W: extend the AcpiVerb enum with two new variants for the S3 round-trip: * AcpiVerb::SetS3WakingVector (= 5): acpid writes the kernel's S3 resume trampoline address to FACS. Mirrors Linux 7.1's acpi_set_firmware_waking_vector. The 8-byte write payload is the address in little-endian. A zero payload is a sentinel for 'use the kernel's default trampoline address' (s3_trampoline symbol). * AcpiVerb::EnterS3 (= 6): acpid requests the kernel to enter S3. The kernel's stop::enter_s3() reads the SLP_TYP value from S3_SLP_TYP and does the PM1 register write. The actual S3 entry happens via acpid writing to /scheme/sys/kstop. Hardware-agnostic: works on any x86_64 system with standard ACPI S3 support (Dell, HP, Lenovo, LG Gram 14). On Modern Standby-only systems (LG Gram 16 (2025)), the kernel never enters S3 so these verbs are no-ops.
568 lines
18 KiB
Rust
568 lines
18 KiB
Rust
use bitflags::bitflags as inner_bitflags;
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use core::{mem, ops::Deref, slice};
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macro_rules! bitflags {
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(
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$(#[$outer:meta])*
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pub struct $BitFlags:ident: $T:ty {
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$(
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$(#[$inner:ident $($args:tt)*])*
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const $Flag:ident = $value:expr;
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)+
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}
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) => {
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// First, use the inner bitflags
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inner_bitflags! {
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#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy, Default)]
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$(#[$outer])*
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pub struct $BitFlags: $T {
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$(
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$(#[$inner $($args)*])*
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const $Flag = $value;
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)+
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}
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}
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impl $BitFlags {
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#[deprecated = "use the safe `from_bits_retain` method instead"]
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pub unsafe fn from_bits_unchecked(bits: $T) -> Self {
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Self::from_bits_retain(bits)
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}
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}
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// Secondly, re-export all inner constants
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// (`pub use self::Struct::*` doesn't work)
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$(
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$(#[$inner $($args)*])*
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pub const $Flag: $BitFlags = $BitFlags::$Flag;
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)+
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}
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}
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pub const CLOCK_REALTIME: usize = 1;
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pub const CLOCK_MONOTONIC: usize = 4;
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bitflags! {
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pub struct EventFlags: usize {
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const EVENT_NONE = 0;
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const EVENT_READ = 1;
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const EVENT_WRITE = 2;
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}
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}
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pub const F_DUPFD: usize = 0;
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pub const F_GETFD: usize = 1;
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pub const F_SETFD: usize = 2;
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pub const F_GETFL: usize = 3;
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pub const F_SETFL: usize = 4;
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pub const F_DUPFD_CLOEXEC: usize = 1030;
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pub const FUTEX_WAIT: usize = 0;
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pub const FUTEX_WAKE: usize = 1;
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pub const FUTEX_REQUEUE: usize = 2;
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pub const FUTEX_WAIT64: usize = 3;
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// TODO: Split SendFdFlags into caller flags and flags that the scheme receives?
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bitflags::bitflags! {
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#[derive(Clone, Copy, Debug)]
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pub struct SendFdFlags: usize {
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/// If set, the kernel will enforce that the file descriptors are exclusively owned.
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///
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/// That is, there will no longer exist any other reference to those FDs when removed from
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/// the file table (sendfd always removes the FDs from the file table, but without this
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/// flag, it can be retained by SYS_DUPing them first).
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const EXCLUSIVE = 1;
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/// If set, the file descriptors will be cloned and *not* removed from the sender's file table.
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/// By default, `SYS_SENDFD` moves the file descriptors, removing them from the sender.
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const CLONE = 2;
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}
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}
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bitflags::bitflags! {
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#[derive(Clone, Copy, Debug)]
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pub struct FobtainFdFlags: usize {
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/// If set, the SYS_CALL payload specifies the destination file descriptor slots, otherwise the lowest
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/// available slots will be selected, and placed in the usize pointed to by SYS_CALL
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/// payload.
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const MANUAL_FD = 1;
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/// If set, the file descriptors received are guaranteed to be exclusively owned (by the file
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/// table the obtainer is running in).
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const EXCLUSIVE = 2;
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/// If set, the file descriptors received will be placed into the *upper* file table.
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const UPPER_TBL = 4;
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/// If set, the received file descriptors are marked as close-on-exec.
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const CLOEXEC = 8;
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// No, cloexec won't be stored in the kernel in the future, when the stable ABI is moved to
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// relibc, so no flag for that!
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}
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}
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bitflags::bitflags! {
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#[derive(Clone, Copy, Debug)]
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pub struct RecvFdFlags: usize {
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/// If set, the SYS_CALL payload specifies the destination file descriptor slots, otherwise the lowest
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/// available slots will be selected, and placed in the usize pointed to by SYS_CALL
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/// payload.
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const MANUAL_FD = 1;
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/// If set, the file descriptors received will be placed into the *upper* file table.
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const UPPER_TBL = 2;
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/// If set, the received file descriptors are marked as close-on-exec.
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const CLOEXEC = 4;
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}
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}
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bitflags::bitflags! {
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#[derive(Clone, Copy, Debug)]
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pub struct FmoveFdFlags: usize {
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/// If set, the kernel will enforce that the file descriptors are exclusively owned.
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///
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/// That is, there will no longer exist any other reference to those FDs when removed from
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/// the file table (SYS_CALL always removes the FDs from the file table, but without this
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/// flag, it can be retained by SYS_DUPing them first).
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const EXCLUSIVE = 1;
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/// If set, the file descriptors will be cloned and *not* removed from the sender's file table.
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/// By default, sendfd moves the file descriptors, removing them from the sender.
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const CLONE = 2;
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}
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}
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bitflags! {
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pub struct MapFlags: usize {
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// TODO: Downgrade PROT_NONE to global constant? (bitflags specifically states zero flags
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// can cause buggy behavior).
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const PROT_NONE = 0x0000_0000;
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const PROT_EXEC = 0x0001_0000;
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const PROT_WRITE = 0x0002_0000;
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const PROT_READ = 0x0004_0000;
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const MAP_SHARED = 0x0001;
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const MAP_PRIVATE = 0x0002;
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const MAP_FIXED = 0x0004;
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const MAP_FIXED_NOREPLACE = 0x000C;
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/// For *userspace-backed mmaps*, return from the mmap call before all pages have been
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/// provided by the scheme. This requires the scheme to be trusted, as the current context
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/// can block indefinitely, if the scheme does not respond to the page fault handler's
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/// request, as it tries to map the page by requesting it from the scheme.
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///
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/// In some cases however, such as the program loader, the data needs to be trusted as much
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/// with or without MAP_LAZY, and if so, mapping lazily will not cause insecureness by
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/// itself.
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///
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/// For kernel-backed mmaps, this flag has no effect at all. It is unspecified whether
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/// kernel mmaps are lazy or not.
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const MAP_LAZY = 0x0010;
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}
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}
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bitflags! {
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pub struct MunmapFlags: usize {
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/// Indicates whether the funmap call must implicitly do an msync, for the changes to
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/// become visible later.
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///
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/// This flag will currently be set if and only if MAP_SHARED | PROT_WRITE are set.
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const NEEDS_SYNC = 1;
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}
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}
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pub const MODE_TYPE: u16 = 0xF000;
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pub const MODE_DIR: u16 = 0x4000;
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pub const MODE_FILE: u16 = 0x8000;
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pub const MODE_SYMLINK: u16 = 0xA000;
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pub const MODE_FIFO: u16 = 0x1000;
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pub const MODE_CHR: u16 = 0x2000;
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pub const MODE_SOCK: u16 = 0xC000;
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pub const MODE_PERM: u16 = 0x0FFF;
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pub const MODE_SETUID: u16 = 0o4000;
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pub const MODE_SETGID: u16 = 0o2000;
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pub const O_RDONLY: usize = 0x0001_0000;
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pub const O_WRONLY: usize = 0x0002_0000;
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pub const O_RDWR: usize = 0x0003_0000;
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pub const O_NONBLOCK: usize = 0x0004_0000;
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pub const O_APPEND: usize = 0x0008_0000;
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pub const O_SHLOCK: usize = 0x0010_0000;
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pub const O_EXLOCK: usize = 0x0020_0000;
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pub const O_ASYNC: usize = 0x0040_0000;
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pub const O_FSYNC: usize = 0x0080_0000;
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pub const O_CLOEXEC: usize = 0x0100_0000;
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pub const O_CREAT: usize = 0x0200_0000;
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pub const O_TRUNC: usize = 0x0400_0000;
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pub const O_EXCL: usize = 0x0800_0000;
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pub const O_DIRECTORY: usize = 0x1000_0000;
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pub const O_STAT: usize = 0x2000_0000;
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pub const O_SYMLINK: usize = 0x4000_0000;
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pub const O_NOFOLLOW: usize = 0x8000_0000;
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pub const O_ACCMODE: usize = O_RDONLY | O_WRONLY | O_RDWR;
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pub const O_FCNTL_MASK: usize = O_NONBLOCK | O_APPEND | O_ASYNC | O_FSYNC;
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/// Remove directory instead of unlinking file.
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pub const AT_REMOVEDIR: usize = 0x200;
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// The top 48 bits of PTRACE_* are reserved, for now
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// NOT ABI STABLE!
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#[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
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#[repr(usize)]
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pub enum ContextStatus {
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Runnable,
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Blocked,
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NotYetStarted,
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Dead,
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ForceKilled,
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Stopped,
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UnhandledExcp,
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#[default]
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Other, // reserved
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}
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#[derive(Clone, Copy, Debug, Eq, PartialEq)]
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#[repr(usize)]
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pub enum ContextVerb {
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Stop = 1,
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Unstop = 2,
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Interrupt = 3,
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ForceKill = usize::MAX,
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}
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impl ContextVerb {
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pub fn try_from_raw(raw: usize) -> Option<Self> {
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Some(match raw {
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1 => Self::Stop,
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2 => Self::Unstop,
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3 => Self::Interrupt,
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usize::MAX => Self::ForceKill,
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_ => return None,
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})
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}
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}
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// NOT ABI STABLE!
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#[derive(Clone, Copy, Debug, Eq, PartialEq)]
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#[repr(u8)]
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pub enum AddrSpaceVerb {
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MmapMin = 255,
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}
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impl AddrSpaceVerb {
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pub fn try_from_raw(verb: u8) -> Option<Self> {
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Some(match verb {
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255 => Self::MmapMin,
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_ => return None,
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})
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}
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}
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// NOT ABI STABLE!
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#[derive(Clone, Copy, Debug, Eq, PartialEq)]
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#[repr(u8)]
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pub enum ProcSchemeVerb {
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RegsInt = 250,
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RegsFloat = 251,
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RegsEnv = 252,
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SchedAffinity = 253,
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Start = 254,
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Iopl = 255,
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}
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impl ProcSchemeVerb {
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pub fn try_from_raw(verb: u8) -> Option<Self> {
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Some(match verb {
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250 => Self::RegsInt,
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251 => Self::RegsFloat,
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252 => Self::RegsEnv,
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253 => Self::SchedAffinity,
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254 => Self::Start,
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255 => Self::Iopl,
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_ => return None,
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})
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}
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}
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#[derive(Clone, Copy, Debug, Eq, PartialEq)]
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pub enum FileTableVerb {
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Close = 1,
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Dup2 = 2,
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CloseCloExec = 3,
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}
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impl FileTableVerb {
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pub fn try_from_raw(value: u8) -> Option<Self> {
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Some(match value {
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1 => Self::Close,
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2 => Self::Dup2,
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3 => Self::CloseCloExec,
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_ => return None,
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})
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}
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}
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// NOT ABI-STABLE!
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#[derive(Clone, Copy, Debug, Eq, PartialEq)]
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#[repr(u64)]
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pub enum AcpiVerb {
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// copies the rsdt/xsdt to the payload buffer (the number of bytes that fit), and returns the
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// rsdt/xsdt length regardless
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ReadRxsdt = 1,
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// no payload, just returns 0 or 1
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CheckShutdown = 2,
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/// Red Bear OS extension (Phase I): acpid requests the kernel
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/// enter s2idle (Modern Standby / S0ix). The kernel sets
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/// `S2IDLE_REQUESTED`; the idle path calls `mwait_loop()`. Read
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/// payload (1 byte) returns the *previous* value of the flag.
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/// Write payload is opaque (ignored by current kernel).
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/// Mirrors Linux 7.1 `s2idle_enter()` in
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/// `kernel/power/suspend.c:91`. Hardware-agnostic — works on
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/// any platform with Modern Standby firmware (Dell, HP, Lenovo,
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/// LG Gram, etc.), not just LG Gram.
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EnterS2Idle = 3,
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/// Red Bear OS extension (Phase I): acpid signals s2idle
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/// exit. Kernel clears `S2IDLE_REQUESTED`. Read payload (1
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/// byte) always returns 0. Mirrors Linux 7.1 `s2idle_wake()` in
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/// `kernel/power/suspend.c:133`. Hardware-agnostic.
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ExitS2Idle = 4,
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/// Red Bear OS extension (Phase II.X.W): acpid writes the
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/// 64-bit kernel S3 resume trampoline address to
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/// FACS.xfirmware_waking_vector. The kernel's
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/// `arch/x86_shared/s3_resume.rs` trampoline is at this
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/// address; the platform firmware jumps to it on S3 wake.
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/// Write payload: 8-byte little-endian u64 (the trampoline
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/// address). Read payload: 0 (no error condition; this verb
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/// is one-way). Mirrors Linux 7.1's
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/// `acpi_set_firmware_waking_vector` in ACPICA.
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/// Hardware-agnostic: works on any x86_64 system with
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/// standard ACPI S3 support (Dell, HP, Lenovo, LG Gram 14).
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SetS3WakingVector = 5,
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/// Red Bear OS extension (Phase II.X.W): acpid requests
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/// the kernel to enter S3. The kernel's kstop handler
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/// dispatches on the "s3" string arg, dispatches on the
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/// SLP_TYP byte, and does the PM1 register write. The
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/// acpid has already done the AML prep (`_TTS(3)`, `_PTS(3)`,
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/// `_SST(3)`) and written the trampoline address to FACS
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/// via `SetS3WakingVector`. No payload needed.
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/// Mirrors Linux 7.1's `enter_sleep_state` /
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/// `acpi_hw_legacy_sleep` for S3.
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EnterS3 = 6,
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}
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impl AcpiVerb {
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pub const fn try_from_raw(value: u64) -> Option<Self> {
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Some(match value {
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1 => Self::ReadRxsdt,
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2 => Self::CheckShutdown,
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3 => Self::EnterS2Idle,
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4 => Self::ExitS2Idle,
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5 => Self::SetS3WakingVector,
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6 => Self::EnterS3,
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_ => return None,
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})
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}
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}
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#[derive(Clone, Copy, Debug, Eq, PartialEq)]
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#[repr(usize)]
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pub enum SchemeSocketCall {
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ObtainFd = 0,
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MoveFd = 1,
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}
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impl SchemeSocketCall {
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pub fn try_from_raw(raw: usize) -> Option<Self> {
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Some(match raw {
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0 => Self::ObtainFd,
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1 => Self::MoveFd,
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_ => return None,
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})
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}
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}
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#[derive(Clone, Copy, Debug, Eq, PartialEq)]
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#[repr(usize)]
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#[non_exhaustive]
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pub enum FsCall {
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Connect = 0,
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}
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impl FsCall {
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pub fn try_from_raw(raw: usize) -> Option<Self> {
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Some(match raw {
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0 => Self::Connect,
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_ => return None,
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})
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}
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}
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bitflags! {
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pub struct PtraceFlags: u64 {
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/// Stop before a syscall is handled. Send PTRACE_FLAG_IGNORE to not
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/// handle the syscall.
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const PTRACE_STOP_PRE_SYSCALL = 0x0000_0000_0000_0001;
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/// Stop after a syscall is handled.
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const PTRACE_STOP_POST_SYSCALL = 0x0000_0000_0000_0002;
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/// Stop after exactly one instruction. TODO: This may not handle
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/// fexec/signal boundaries. Should it?
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const PTRACE_STOP_SINGLESTEP = 0x0000_0000_0000_0004;
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/// Stop before a signal is handled. Send PTRACE_FLAG_IGNORE to not
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/// handle signal.
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const PTRACE_STOP_SIGNAL = 0x0000_0000_0000_0008;
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/// Stop on a software breakpoint, such as the int3 instruction for
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/// x86_64.
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const PTRACE_STOP_BREAKPOINT = 0x0000_0000_0000_0010;
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/// Stop just before exiting for good.
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const PTRACE_STOP_EXIT = 0x0000_0000_0000_0020;
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const PTRACE_STOP_MASK = 0x0000_0000_0000_00FF;
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/// Sent when a child is cloned, giving you the opportunity to trace it.
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/// If you don't catch this, the child is started as normal.
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const PTRACE_EVENT_CLONE = 0x0000_0000_0000_0100;
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/// Sent when current-addrspace is changed, allowing the tracer to reopen the memory file.
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const PTRACE_EVENT_ADDRSPACE_SWITCH = 0x0000_0000_0000_0200;
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const PTRACE_EVENT_MASK = 0x0000_0000_0000_0F00;
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/// Special meaning, depending on the event. Usually, when fired before
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/// an action, it will skip performing that action.
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const PTRACE_FLAG_IGNORE = 0x0000_0000_0000_1000;
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const PTRACE_FLAG_MASK = 0x0000_0000_0000_F000;
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}
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}
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impl Deref for PtraceFlags {
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type Target = [u8];
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fn deref(&self) -> &Self::Target {
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// Same as to_ne_bytes but in-place
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unsafe {
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slice::from_raw_parts(&self.bits() as *const _ as *const u8, mem::size_of::<u64>())
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}
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}
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}
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pub const SEEK_SET: usize = 0;
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pub const SEEK_CUR: usize = 1;
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pub const SEEK_END: usize = 2;
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pub const SIGCHLD: usize = 17;
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pub const SIGTSTP: usize = 20;
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pub const SIGTTIN: usize = 21;
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pub const SIGTTOU: usize = 22;
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pub const ADDRSPACE_OP_MMAP: usize = 0;
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pub const ADDRSPACE_OP_MUNMAP: usize = 1;
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pub const ADDRSPACE_OP_MPROTECT: usize = 2;
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pub const ADDRSPACE_OP_TRANSFER: usize = 3;
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bitflags! {
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pub struct MremapFlags: usize {
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const FIXED = 1;
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const FIXED_REPLACE = 3;
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/// Alias's memory region at `old_address` to `new_address` such that both regions share
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/// the same frames.
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|
const KEEP_OLD = 1 << 2;
|
|
// TODO: MAYMOVE, DONTUNMAP
|
|
}
|
|
}
|
|
bitflags! {
|
|
pub struct RwFlags: u32 {
|
|
const NONBLOCK = 1;
|
|
const APPEND = 2;
|
|
// TODO: sync/dsync
|
|
// TODO: O_DIRECT?
|
|
}
|
|
}
|
|
bitflags! {
|
|
pub struct SigcontrolFlags: usize {
|
|
/// Prevents the kernel from jumping the context to the signal trampoline, but otherwise
|
|
/// has absolutely no effect on which signals are blocked etc. Meant to be used for
|
|
/// short-lived critical sections inside libc.
|
|
const INHIBIT_DELIVERY = 1;
|
|
}
|
|
}
|
|
bitflags! {
|
|
pub struct CallFlags: usize {
|
|
// reserved
|
|
const RSVD0 = 1 << 0;
|
|
const RSVD1 = 1 << 1;
|
|
const RSVD2 = 1 << 2;
|
|
const RSVD3 = 1 << 3;
|
|
const RSVD4 = 1 << 4;
|
|
const RSVD5 = 1 << 5;
|
|
const RSVD6 = 1 << 6;
|
|
const RSVD7 = 1 << 7;
|
|
|
|
/// Remove the fd from the caller's file table before sending the message.
|
|
const CONSUME = 1 << 8;
|
|
|
|
const WRITE = 1 << 9;
|
|
const READ = 1 << 10;
|
|
|
|
/// Indicates the request is a bulk fd passing request.
|
|
const FD = 1 << 11;
|
|
/// Flags for the fd passing request.
|
|
const FD_EXCLUSIVE = 1 << 12;
|
|
const FD_CLONE = 1 << 13;
|
|
const FD_UPPER = 1 << 14;
|
|
const FD_CLOEXEC = 1 << 15;
|
|
|
|
/// Call is a standard fs call, with metadata defined in `StdFsCallMeta`
|
|
const STD_FS = 1 << 16;
|
|
|
|
/// Call is taking multiple fds as an argument
|
|
const MULTIPLE_FDS = 1 << 17;
|
|
}
|
|
}
|
|
|
|
#[repr(u8)]
|
|
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
|
|
pub enum StdFsCallKind {
|
|
// TODO: remove old syscalls
|
|
Fchmod = 1,
|
|
Fchown = 2,
|
|
Getdents = 3,
|
|
Fstat = 4,
|
|
Fstatvfs = 5,
|
|
Fsync = 6,
|
|
Ftruncate = 7,
|
|
Futimens = 8,
|
|
// 9 reserved in fscall RFC
|
|
// Unlinkat = 10,
|
|
Relpathat = 11,
|
|
Lock = 12,
|
|
Unlock = 13,
|
|
GetLock = 14,
|
|
}
|
|
|
|
impl StdFsCallKind {
|
|
pub fn try_from_raw(raw: u8) -> Option<Self> {
|
|
use StdFsCallKind::*;
|
|
|
|
// TODO: Use a library where this match can be automated.
|
|
Some(match raw {
|
|
1 => Fchmod,
|
|
2 => Fchown,
|
|
3 => Getdents,
|
|
4 => Fstat,
|
|
5 => Fstatvfs,
|
|
6 => Fsync,
|
|
7 => Ftruncate,
|
|
8 => Futimens,
|
|
// 9 reserved in fscall RFC
|
|
// 10 => Unlinkat,
|
|
11 => Relpathat,
|
|
12 => Lock,
|
|
13 => Unlock,
|
|
14 => GetLock,
|
|
_ => return None,
|
|
})
|
|
}
|
|
}
|
|
|
|
/// The tag for the fd number in the upper file descriptor table.
|
|
pub const UPPER_FDTBL_TAG: usize = 1 << (usize::BITS - 2);
|
|
|
|
/// The identifier for registering event timeout
|
|
pub const EVENT_TIMEOUT_ID: usize = usize::MAX - 2;
|