Add preliminary RISC-V platform support, remove hals, update dependencies

.cargo/config.toml

@@ -2,6 +2,13 @@
 # 使用系统 git 拉取依赖，可利用已配置的 git 凭证（如 gh auth、credential helper）
 git-fetch-with-cli = true
 
+[target.x86_64-unknown-none]
+rustflags = [
+    "-Clink-args=-no-pie",
+    "-Clink-args=-znostart-stop-gc",
+    "-Clink-args=-Tlink.x",
+]
+
 [target.aarch64-unknown-none-softfloat]
 rustflags = [
     "-Crelocation-model=pic",
@@ -10,15 +17,15 @@ rustflags = [
     "-Clink-args=-Taxplat.x",
 ]
 
-[target.'cfg(target_os = "none")']
-runner = "cargo osrun"
-
-[target.x86_64-unknown-none]
+[target.riscv64gc-unknown-none-elf]
 rustflags = [
     "-Clink-args=-no-pie",
     "-Clink-args=-znostart-stop-gc",
     "-Clink-args=-Tlink.x",
 ]
 
+[target.'cfg(target_os = "none")']
+runner = "cargo osrun"
+
 [alias]
-xtask = "run --bin xtask --no-default-features --features xtask --"
+xtask = "run --bin xtask --"

.github/workflows/qemu-riscv64.toml

@@ -0,0 +1,24 @@
+args = [
+  "-nographic",
+  "-cpu",
+  "rv64",
+  "-machine",
+  "virt",
+  "-bios",
+  "default",
+  "-smp",
+  "4",
+  "-device",
+  "virtio-blk-device,drive=disk0",
+  "-drive",
+  "id=disk0,if=none,format=raw,file=${workspaceFolder}/tmp/rootfs.img",
+  "-m",
+  "8g",
+]
+fail_regex = []
+success_regex = [
+    "Hello, world!",
+    "test pass!",
+]
+to_bin = true
+uefi = false