libredox: Red Bear OS Phase J fork (use local syscall with EnterS2Idle/ExitS2Idle)

Phase J: hardware-agnostic s2idle / Modern Standby support
in libredox. The libredox 0.1.17 dep on redox_syscall is
redirected to the local fork at ../syscall (the fork at
local/sources/syscall/ which adds EnterS2Idle/ExitS2Idle
AcPiVerb variants to upstream's 0.8.1).

This breaks the libredox::error::Error <-> syscall::Error
type-identity barrier that previously caused E0277 errors
in scheme-utils and daemon when the local syscall fork
was used. Now that libredox also uses the local fork,
both types are the same compile-time type.

The version field stays at upstream 0.1.17 per the
AGENTS.md 'GOLDEN RULE — Red Bear adapts to upstream,
never the reverse'. Periodic rebase via 'git fetch
upstream' is the workflow when upstream changes.

Hardware-agnostic: works for any platform with Modern
Standby firmware (Dell, HP, Lenovo, LG Gram, etc.).

Cargo.toml

@@ -0,0 +1,75 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2021"
+name = "libredox"
+version = "0.1.17"
+authors = ["4lDO2 <4lDO2@protonmail.com>"]
+build = false
+exclude = ["target"]
+autolib = false
+autobins = false
+autoexamples = false
+autotests = false
+autobenches = false
+description = "Redox stable ABI"
+readme = false
+license = "MIT"
+repository = "https://gitlab.redox-os.org/redox-os/libredox.git"
+
+[features]
+base = ["libc"]
+call = ["base"]
+default = [
+    "base",
+    "call",
+    "std",
+    "redox_syscall",
+    "protocol",
+]
+mkns = ["ioslice"]
+protocol = [
+    "plain",
+    "bitflags",
+]
+std = ["base"]
+
+[lib]
+name = "libredox"
+path = "src/lib.rs"
+
+[dependencies.bitflags]
+version = "2"
+optional = true
+
+[dependencies.ioslice]
+version = "0.6"
+optional = true
+
+[dependencies.libc]
+version = "0.2"
+optional = true
+
+[dependencies.plain]
+version = "0.2"
+optional = true
+
+# Red Bear OS Phase J: path override to the local syscall
+# fork. The local fork at ../syscall/ adds the
+# EnterS2Idle/ExitS2Idle AcPiVerb variants. This breaks
+# the libredox::error::Error <-> syscall::Error type-
+# identity barrier that previously caused E0277 errors in
+# scheme-utils and daemon.
+[dependencies.redox_syscall]
+path = "../syscall"
+version = "0.8"
+optional = true

Cargo.toml.orig

@@ -0,0 +1,42 @@
+[package]
+name = "libredox"
+authors = ["4lDO2 <4lDO2@protonmail.com>"]
+# Red Bear OS Phase J: version is 0.1.17 upstream but the
+# redox_syscall dep is redirected to the local fork at
+# ../syscall (which adds EnterS2Idle/ExitS2Idle AcpiVerb
+# variants). The version field stays at upstream 0.1.17
+# per the AGENTS.md "GOLDEN RULE" — periodic rebase via
+# `git fetch upstream` is the workflow when upstream changes.
+version = "0.1.17"
+edition = "2021"
+license = "MIT"
+description = "Redox stable ABI"
+# Red Bear OS fork lives at the canonical outer repo
+# (gitea.redbearos.org/vasilito/RedBear-OS).
+repository = "https://gitea.redbearos.org/vasilito/RedBear-OS"
+exclude = ["target"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[features]
+default = ["base", "call", "std", "redox_syscall", "protocol"]
+base = ["libc"]
+call = ["base"]
+std = ["base"]
+protocol = ["plain", "bitflags", "redox_syscall"]
+mkns = ["ioslice"]
+
+[dependencies]
+bitflags = { version = "2", optional = true }
+libc = { version = "0.2", optional = true }
+# Phase J: path override to the local fork (../syscall
+# relative to the libredox fork's local/sources/libredox/
+# path). This gives libredox access to the EnterS2Idle /
+# ExitS2Idle AcpiVerb variants. Cargo's [patch.crates-io]
+# in the workspace's outer Cargo.toml (in base/ and kernel/)
+# is what wires this path through to the actual
+# redox_syscall crate; this path entry is the libredox-
+# side patch override for the same crate.
+redox_syscall = { path = "../syscall", version = "0.8", optional = true }
+ioslice = { version = "0.6", optional = true }
+plain = { version = "0.2", optional = true }