Bump Rust to nightly-2022-04-11 && support debugging in release mode

os/Cargo.toml

@@ -22,3 +22,6 @@ easy-fs = { path = "../easy-fs" }
 [features]
 board_qemu = []
 board_k210 = []
+
+[profile.release]
+debug = true

os/Makefile

@@ -14,6 +14,11 @@ SBI ?= rustsbi
 BOOTLOADER := ../bootloader/$(SBI)-$(BOARD).bin
 K210_BOOTLOADER_SIZE := 131072
 
+# Building mode argument
+ifeq ($(MODE), release)
+	MODE_ARG := --release
+endif
+
 # KERNEL ENTRY
 ifeq ($(BOARD), qemu)
 	KERNEL_ENTRY_PA := 0x80200000
@@ -106,4 +111,11 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
-.PHONY: build env kernel clean disasm disasm-vim run-inner switch-check fs-img
+
+gdbserver: build
+	@qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
+gdbclient:
+	@riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'
+
+.PHONY: build env kernel clean disasm disasm-vim run-inner switch-check fs-img gdbserver gdbclient