feat：Improve OSComp musl compatibility, VFS page cache behavior, and procfs/syscall semantics

Makefile

@@ -37,7 +37,7 @@ LOCAL_TESTIMG_DIR ?= ../CCYOS
 TESTIMG_RV ?= $(firstword $(wildcard $(LOCAL_TESTIMG_DIR)/sdcard-rv.img sdcard-rv.img))
 TESTIMG_LA ?= $(firstword $(wildcard $(LOCAL_TESTIMG_DIR)/sdcard-la.img sdcard-la.img))
 RV_TEST_DRIVE := -drive file=$(TESTIMG_RV)$(COMMA)if=none$(COMMA)format=raw$(COMMA)id=test0 -device virtio-blk-device$(COMMA)drive=test0$(COMMA)bus=virtio-mmio-bus.0
-LA_TEST_DRIVE := -drive file=$(TESTIMG_LA)$(COMMA)if=none$(COMMA)format=raw$(COMMA)id=test0 -device virtio-blk-pci$(COMMA)drive=test0
+LA_TEST_DRIVE := -drive file=$(TESTIMG_LA)$(COMMA)if=none$(COMMA)format=raw$(COMMA)id=x0 -device virtio-blk-pci$(COMMA)drive=x0
 
 # 评测构建 profile：默认 release（提交用）。本地调试可 `make all PROFILE=debug`。
 PROFILE ?= release
@@ -141,11 +141,11 @@ disk-la.img: kernel-la $(VFAT_IMG) $(ASSEMBLE_DISK)
 	@$(ASSEMBLE_DISK) $(OS_DIR)/fs-loongarch.img $(VFAT_IMG) $@
 
 # ------------------------------------------------------------
-# 本地运行评测形态：我们的 MBR 分区盘作为 /dev/vda（vda1=rootfs，vda2=VFAT）；
-# 官方测试盘作为额外裸 ext4 块设备 /dev/vdb，由 rcS 挂载到 /tests。
+# 本地运行评测形态：官方测试盘作为额外裸 ext4 块设备，由 rcS 挂载到 /tests。
 # RISC-V virtio-mmio 设备树按高地址先探测，因此我们的分区盘放 bus.1，
 # 官方测试盘放 bus.0，注册出来才是 vda=disk、vdb=sdcard。
-# 设备型号对齐 os/qemu-run.sh（riscv: virtio-mmio）与 os/qemu-loongarch-run.sh（loongarch: pci）。
+# LoongArch 评测命令先挂官方测试盘、后挂 disk-la.img，因此 la 下是
+# vda=sdcard-la.img、vdb=disk-la.img、vdb1=rootfs。
 # ------------------------------------------------------------
 run-rv: kernel-rv disk.img
 	@if [ -z "$(TESTIMG_RV)" ]; then \
@@ -165,12 +165,12 @@ run-la: kernel-la disk-la.img
 		echo "Error: no LoongArch test image found. Set TESTIMG_LA=/path/to/sdcard-la.img" >&2; \
 		exit 1; \
 	fi
-	@echo "[Run] 运行 LoongArch QEMU（内核盘：vda1 rootfs，vda2 VFAT；测试盘：vdb）"
+	@echo "[Run] 运行 LoongArch QEMU（测试盘：vda；内核盘：vdb1 rootfs，vdb2 VFAT）"
 	qemu-system-loongarch64 -machine virt -kernel kernel-la -m $(LA_MEM) -nographic \
 		-smp $(LA_SMP) -no-reboot -rtc base=utc \
-		-drive file=disk-la.img,if=none,format=raw,id=x0 \
-		-device virtio-blk-pci,drive=x0 \
 		$(LA_TEST_DRIVE) \
+		-drive file=disk-la.img,if=none,format=raw,id=x1 \
+		-device virtio-blk-pci,drive=x1 \
 		-device virtio-net-pci,netdev=net0 \
 		-netdev user,id=net0,hostfwd=tcp::5555-:5555,hostfwd=udp::5555-:5555
 

data/loongarch_musl/etc/init.d/rcS

@@ -58,7 +58,7 @@ mount_official_test_image_if_present() {
 
     # Official test images are raw ext4 filesystems whose root contains
     # /musl and /glibc. Mounting one at /tests exposes /tests/musl.
-    dev="/dev/vdb"
+    dev="/dev/vda"
     [ -e "$dev" ] || return 1
 
     echo "[Tests] probing official test image on $dev"
@@ -71,8 +71,8 @@ mount_official_test_image_if_present() {
         /bin/umount /tests 2>/dev/null || true
     fi
 
-    # Old multi-device probe disabled. The run scripts attach the official
-    # input image at /dev/vdb; our own partitioned kernel disk is /dev/vda.
+    # Old multi-device probe disabled. The LoongArch judge attaches the official
+    # input image at /dev/vda; our own partitioned kernel disk is /dev/vdb.
     # for dev in \
     #     /dev/vdb \
     #     /dev/vda \
@@ -116,7 +116,7 @@ stage_musl_tests_to_tmpfs() {
                 ;;
         esac
 
-        if ! /bin/cp -a "$entry" "$dst/"; then
+        if ! /bin/cp -R "$entry" "$dst/"; then
             echo "[Tests] failed to stage $entry"
             /bin/rm -rf "$dst"
             return 1

data/risc-v_musl/etc/init.d/rcS

@@ -116,7 +116,7 @@ stage_musl_tests_to_tmpfs() {
                 ;;
         esac
 
-        if ! /bin/cp -a "$entry" "$dst/"; then
+        if ! /bin/cp -R "$entry" "$dst/"; then
             echo "[Tests] failed to stage $entry"
             /bin/rm -rf "$dst"
             return 1
@@ -127,8 +127,8 @@ stage_musl_tests_to_tmpfs() {
 }
 
 run_musl_tests_if_present() {
-    # 官方测试镜像挂载到 /tests 后，自动扫描并运行 musl 下的全部测试脚本；
-    # glibc 分组保留在测试镜像中，后续需要时直接调整本脚本。
+    # 官方测试镜像挂载到 /tests 后，自动扫描 musl 下的全部测试脚本；
+    # 需要排除的脚本维护在 skip-list 中。
     mount_official_test_image_if_present || true
     [ -d /tests/musl ] || return 1
 
@@ -143,9 +143,9 @@ run_musl_tests_if_present() {
     echo "[Tests] detected musl test scripts; running in rcS"
 
     if [ -n "$staged_musl_dir" ]; then
-        export PATH="/bin:/sbin:/usr/bin:/usr/sbin:$staged_musl_dir:/tests/musl"
+        export PATH="/bin:/sbin:/usr/bin:/usr/sbin:$staged_musl_dir:/tests/musl:/tests/musl/ltp/testcases/bin"
     else
-        export PATH="/bin:/sbin:/usr/bin:/usr/sbin:/tests/musl"
+        export PATH="/bin:/sbin:/usr/bin:/usr/sbin:/tests/musl:/tests/musl/ltp/testcases/bin"
     fi
     export TMPDIR="/tmp"
     export HOME="/"
@@ -155,8 +155,9 @@ run_musl_tests_if_present() {
 
         base="${src_f##*/}"
         case "$base" in
-            unixbench_testcode.sh|lmbench_testcode.sh|libcbench_testcode.sh|libctest_testcode.sh)
-                echo "[Tests] skipping already-validated $src_f"
+            ltp_testcode.sh|\
+            unixbench_testcode.sh)
+                echo "[Tests] skipping $src_f"
                 continue
                 ;;
         esac

os/src/config.rs

@@ -34,7 +34,7 @@ pub const USER_SIGRETURN_TRAMPOLINE: usize =
     align_down(<ArchImpl as VirtualMemory>::USER_TOP, PAGE_SIZE);
 
 /// Maximum heap size (prevent OOM)
-pub const MAX_USER_HEAP_SIZE: usize = 64 * 1024 * 1024; // 64MB
+pub const MAX_USER_HEAP_SIZE: usize = 128 * 1024 * 1024; // 128MB
 
 pub const DEFAULT_MAX_FDS: usize = 256;