meta: update kernel

arch/x86_64/QEMU.cmake

@@ -9,10 +9,11 @@ find_program(GDB gdb)
 
 set(patched_kernel ${CMAKE_CURRENT_BINARY_DIR}/kernel/${kernel_name}.elf32)
 set(generic_flags -m 1G)
+set(no_debug_flags)
 
 if (${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
 	message(STATUS "QEMU: Enabling KVM acceleration")
-	set(generic_flags ${generic_flags} -enable-kvm)
+	set(no_debug_flags ${no_debug_flags} -enable-kvm)
 else ()
 	message(STATUS "QEMU: Host system is not Linux. KVM acceleration unavailable")
 endif ()
@@ -33,7 +34,7 @@ add_custom_target(run-kernel
 		${QEMU}
 		-kernel ${patched_kernel}
 		-initrd ${sys_dir}/${bsp_name}
-		${generic_flags}
+		${generic_flags} ${no_debug_flags}
 		-serial stdio
 		--append kernel.early-console=ttyS0
 	USES_TERMINAL
@@ -42,12 +43,12 @@ add_custom_target(run-kernel
 add_custom_target(run-kernel-monitor
 	COMMAND
 		${QEMU}
-		-kernel $<TARGET_FILE:${kernel_name}>
+		-kernel ${patched_kernel}
 		-initrd ${sys_dir}/${bsp_name}
-		${generic_flags}
+		${generic_flags} ${no_debug_flags}
 		-monitor stdio
 	USES_TERMINAL
-	DEPENDS ${kernel_name} bsp)
+	DEPENDS ${patched_kernel} bsp)
 
 if (image_cdrom)
 	message(STATUS "QEMU: Enable CD-ROM boot")
@@ -55,7 +56,7 @@ if (image_cdrom)
 		COMMAND
 			${QEMU}
 			-cdrom ${image_cdrom}
-			${generic_flags}
+			${generic_flags} ${no_debug_flags}
 			-serial stdio
 		USES_TERMINAL
 		DEPENDS ${image_cdrom})
@@ -99,9 +100,9 @@ elseif (GDB)
 				-initrd ${sys_dir}/${bsp_name}
 				${generic_flags}
 				-s -S &
-			${GDB}
-				-o "file ${CMAKE_BINARY_DIR}/kernel/${kernel_name}.debug"
-				-o "remote localhost:1234"
+			${GDB}  -tui
+				-ex "file ${CMAKE_BINARY_DIR}/kernel/${kernel_name}.debug"
+				-ex "target remote localhost:1234"
 		USES_TERMINAL
 		DEPENDS ${patched_kernel} bsp)
 
@@ -114,10 +115,9 @@ elseif (GDB)
 				${generic_flags}
 				-s -S &
 			${GDB}  -tui
-				-s "${CMAKE_BINARY_DIR}/kernel/${kernel_name}.debug"
+				-ex "file ${CMAKE_BINARY_DIR}/kernel/${kernel_name}.debug"
 				-ex "target remote localhost:1234"
 			USES_TERMINAL
 			DEPENDS ${image_cdrom})
 	endif ()
 endif ()
-

configure-build

@@ -8,6 +8,7 @@ if [ ! -n "$target_arch" ]; then
 	exit -1
 fi
 
+build_type=Debug
 source_dir=$(realpath $(dirname "$0"))
 native_build_dir=$source_dir/build-native
 target_build_dir=$source_dir/build
@@ -28,6 +29,7 @@ cmake \
 	-DCMAKE_LIBRARY_OUTPUT_DIRECTORY="$native_build_dir/lib" \
 	-DCMAKE_ARCHIVE_OUTPUT_DIRECTORY="$native_build_dir/lib" \
 	-DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
+	-DCMAKE_BUILD_TYPE=$build_type \
 	$source_dir/kernel/tools
 
 popd
@@ -39,6 +41,7 @@ cmake \
 	-DCMAKE_INSTALL_PREFIX=$sysroot_dir \
 	-DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
 	-DTARGET_ARCH=$target_arch \
+	-DCMAKE_BUILD_TYPE=$build_type \
 	$source_dir \
 	-DCMAKE_MODULE_PATH=$source_dir/arch/$target_arch \
 	-DCMAKE_SYSTEM_NAME=Rosetta \

lib/libmsg-fs/CMakeLists.txt

@@ -18,4 +18,4 @@ sysroot_add_library(
 	HEADER_DIR /usr/include
 	LIB_DIR /usr/lib)
 
-target_link_libraries(libmsg-fs libmsg libmango)
+target_link_libraries(libmsg-fs libmsg libmango ulibc)

lib/libmsg-fs/fs.c

@@ -1,3 +1,111 @@
-void msg_fs_tmp(void)
+#include <rosetta/msg/fs.h>
+#include <string.h>
+
+kern_status_t rosetta_msg_fs_open_send(
+	kern_handle_t port,
+	const char *path,
+	int flags,
+	int *out_err)
 {
+	size_t path_len = strlen(path);
+
+	struct rosetta_msg_fs_open msg = {0};
+	rosetta_msg_init(&msg.msg_base, ROSETTA_MSG_FS, ROSETTA_MSG_FS_OPEN);
+	uint16_t offset = sizeof msg;
+	msg.msg_request.o_path = offset;
+	msg.msg_request.o_path_len = path_len;
+	msg.msg_request.o_flags = flags;
+
+	struct iovec send_vec[] = {
+		IOVEC(&msg, sizeof msg),
+		IOVEC(path, path_len),
+	};
+
+	struct iovec reply_vec[] = {
+		IOVEC(&msg, sizeof msg),
+	};
+
+	struct msg req = {
+		.msg_data = send_vec,
+		.msg_data_count = sizeof send_vec / sizeof send_vec[0],
+	};
+
+	struct msg resp = {
+		.msg_data = reply_vec,
+		.msg_data_count = sizeof reply_vec / sizeof reply_vec[0],
+	};
+
+	kern_status_t status = msg_send(port, 0, &req, &resp);
+	if (status != KERN_OK) {
+		return status;
+	}
+
+	*out_err = msg.msg_response.o_err;
+
+	return KERN_OK;
+}
+
+kern_status_t rosetta_msg_fs_open_recv(
+	kern_handle_t channel,
+	msgid_t id,
+	struct rosetta_msg_string *out_path,
+	int *out_flags)
+{
+	struct rosetta_msg_fs_open msg;
+	struct iovec vec = IOVEC(&msg, sizeof msg);
+	size_t r = 0;
+
+	kern_status_t status = msg_read(channel, id, 0, &vec, 1, &r);
+	if (status != KERN_OK) {
+		return status;
+	}
+
+	if (r != sizeof msg) {
+		/* TODO better error code for malformed messages */
+		return KERN_INVALID_ARGUMENT;
+	}
+
+	out_path->s_len = msg.msg_request.o_path_len;
+	if (out_path->s_max > 0) {
+		vec.io_base = (virt_addr_t)out_path->s_buf;
+		vec.io_len = out_path->s_max - 1;
+
+		if (vec.io_len > out_path->s_len) {
+			vec.io_len = out_path->s_len;
+		}
+
+		status = msg_read(
+			channel,
+			id,
+			msg.msg_request.o_path,
+			&vec,
+			1,
+			&r);
+		if (status != KERN_OK) {
+			return status;
+		}
+
+		if (r != out_path->s_len) {
+			return KERN_INVALID_ARGUMENT;
+		}
+
+		out_path->s_buf[out_path->s_len] = 0;
+	}
+
+	*out_flags = msg.msg_request.o_flags;
+
+	return KERN_OK;
+}
+
+kern_status_t rosetta_msg_fs_open_reply(
+	kern_handle_t channel,
+	msgid_t id,
+	int err)
+{
+	struct rosetta_msg_fs_open msg = {0};
+	msg.msg_response.o_err = err;
+	struct iovec vec = IOVEC(&msg, sizeof msg);
+
+	struct msg kmsg = {.msg_data = &vec, .msg_data_count = 1};
+	return msg_reply(channel, 0, id, &kmsg);
 }

lib/libmsg-fs/include/rosetta/msg/fs.h

@@ -7,21 +7,36 @@
 #define ROSETTA_MSG_FS      0x01409DD2U
 
 /* rosetta.msg.fs.open message ID */
-#define ROSETTA_MSG_FS_OPEN 0x7D837778U
+#define ROSETTA_MSG_FS_OPEN 0x7778U
 
 struct rosetta_msg_fs_open {
 	struct rosetta_msg msg_base;
 	union {
 		struct {
 			uint16_t o_path;
+			uint16_t o_path_len;
 			uint16_t o_flags;
 		} msg_request;
 
 		struct {
 			int o_err;
-			uint16_t o_fd_index;
 		} msg_response;
 	};
 };
 
+extern kern_status_t rosetta_msg_fs_open_send(
+	kern_handle_t port,
+	const char *path,
+	int flags,
+	int *out_err);
+extern kern_status_t rosetta_msg_fs_open_recv(
+	kern_handle_t channel,
+	msgid_t id,
+	struct rosetta_msg_string *out_path,
+	int *out_flags);
+extern kern_status_t rosetta_msg_fs_open_reply(
+	kern_handle_t channel,
+	msgid_t id,
+	int err);
+
 #endif

lib/libmsg/CMakeLists.txt

@@ -18,4 +18,4 @@ sysroot_add_library(
 	HEADER_DIR /usr/include
 	LIB_DIR /usr/lib)
 
-target_link_libraries(libmsg libmango)
+target_link_libraries(libmsg libmango ulibc)

lib/libmsg/include/rosetta/msg.h

@@ -3,6 +3,7 @@
 
 #define ROSETTA_MSG_MAGIC 0x9AB07D10U
 
+#include <mango/msg.h>
 #include <stdint.h>
 
 struct rosetta_msg {
@@ -12,4 +13,19 @@ struct rosetta_msg {
 	uint16_t msg_reserved;
 };
 
+struct rosetta_msg_string {
+	char *s_buf;
+	size_t s_len;
+	size_t s_max;
+};
+
+extern void rosetta_msg_init(
+	struct rosetta_msg *msg,
+	uint32_t protocol_id,
+	uint16_t msg_id);
+extern kern_status_t rosetta_msg_recv(
+	kern_handle_t channel,
+	msgid_t *out_id,
+	struct rosetta_msg *out_msg);
+
 #endif

lib/libmsg/msg.c

@@ -1,3 +1,33 @@
-void msg_tmp(void)
+#include <rosetta/msg.h>
+#include <string.h>
+
+void rosetta_msg_init(
+	struct rosetta_msg *msg,
+	uint32_t protocol_id,
+	uint16_t msg_id)
 {
+	memset(msg, 0x0, sizeof *msg);
+
+	msg->msg_magic = ROSETTA_MSG_MAGIC;
+	msg->msg_protocol = protocol_id;
+	msg->msg_id = msg_id;
+}
+
+kern_status_t rosetta_msg_recv(
+	kern_handle_t channel,
+	msgid_t *out_id,
+	struct rosetta_msg *out_msg)
+{
+	struct iovec iov = IOVEC(out_msg, sizeof *out_msg);
+	struct msg kmsg = MSG(&iov, 1, NULL, 0);
+	kern_status_t status = msg_recv(channel, 0, out_id, &kmsg);
+	if (status != KERN_OK) {
+		return status;
+	}
+
+	if (out_msg->msg_magic != ROSETTA_MSG_MAGIC) {
+		return KERN_INVALID_ARGUMENT;
+	}
+
+	return KERN_OK;
 }

sys/bootstrap/CMakeLists.txt

@@ -5,7 +5,7 @@ set_property(SOURCE ${arch_sources} PROPERTY LANGUAGE C)
 
 add_executable(bootstrap ${c_sources} ${arch_sources})
 
-target_link_libraries(bootstrap libmango ulibc liblaunch)
+target_link_libraries(bootstrap libmango ulibc liblaunch libmsg-fs)
 
 target_compile_options(bootstrap PRIVATE
 	-fPIC -pie -fno-stack-protector -nostdlib -ffreestanding)

sys/bootstrap/main.c

@@ -5,9 +5,10 @@
 #include <mango/msg.h>
 #include <mango/task.h>
 #include <mango/types.h>
+#include <rosetta/msg.h>
+#include <rosetta/msg/fs.h>
 #include <stdint.h>
 #include <stdio.h>
-#include <string.h>
 
 #define INIT_PATH "/usr/bin/test"
 
@@ -98,27 +99,47 @@ int main(
 	kern_logf("launch result: %d", status);
 
 #if 1
-	char msg_buf[512];
-	struct iovec vec = {
-		.io_base = (virt_addr_t)msg_buf,
-		.io_len = sizeof msg_buf,
-	};
-	struct msg msg = {.msg_data = &vec, .msg_data_count = 1};
 
 	while (1) {
-		msgid_t id = 0;
-		kern_status_t kstatus = msg_recv(channel, 0, &id, &msg);
-		if (kstatus != KERN_OK) {
-			kern_logf("msg_recv failed %d", kstatus);
-			break;
+		msgid_t id;
+		struct rosetta_msg msg;
+		kern_status_t status = rosetta_msg_recv(channel, &id, &msg);
+		if (status != KERN_OK) {
+			kern_logf("message recv error %d", status);
+			continue;
 		}
 
-		kern_logf("received message %zx: %s", id, msg_buf);
+		if (msg.msg_protocol != ROSETTA_MSG_FS) {
+			kern_logf(
+				"unknown message protocol %u",
+				msg.msg_protocol);
+			continue;
+		}
 
-		size_t len = snprintf(msg_buf, sizeof msg_buf, "Goodbye!");
-		vec.io_len = len + 1;
+		if (msg.msg_id != ROSETTA_MSG_FS_OPEN) {
+			kern_logf("unknown message function %u", msg.msg_id);
+			continue;
+		}
 
-		msg_reply(channel, 0, id, &msg);
+		char path[4096];
+		int flags;
+		struct rosetta_msg_string path_str = {
+			.s_buf = path,
+			.s_max = sizeof path,
+		};
+		status = rosetta_msg_fs_open_recv(
+			channel,
+			id,
+			&path_str,
+			&flags);
+		if (status != KERN_OK) {
+			kern_logf("rosetta.fs.open recv error %d", status);
+			continue;
+		}
+
+		kern_logf("open(%s, %d)", path, flags);
+
+		rosetta_msg_fs_open_reply(channel, id, 0);
 	}
 #endif
 

sys/ld/CMakeLists.txt

@@ -9,7 +9,7 @@ set_target_properties(ld PROPERTIES
 	OUTPUT_NAME "ld64"
 	SUFFIX ".so")
 
-target_link_libraries(ld ulibc libmango)
+target_link_libraries(ld ulibc libmango libmsg-fs)
 
 target_compile_options(ld PRIVATE
 	-fPIC -fno-stack-protector -nostdlib -ffreestanding)

sys/ld/main.c

@@ -1,6 +1,7 @@
 #include <mango/log.h>
 #include <mango/msg.h>
 #include <mango/types.h>
+#include <rosetta/msg/fs.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -35,21 +36,21 @@ int main(
 #if 1
 	port_connect(port, 0, 0);
 
-	const char msg_buf[] = "Hello!";
-	struct iovec vec = IOVEC(msg_buf, 7);
-	struct msg msg = MSG(&vec, 1, NULL, 0);
+	const char *path = "/usr/lib/libc.so";
+	int flags = 4;
+	int err = 0;
 
-	char recv_buf[64];
-	struct iovec recv_vec = IOVEC(recv_buf, sizeof recv_buf);
-	struct msg recv_msg = MSG(&recv_vec, 1, NULL, 0);
+	kern_logf("calling open(%s, %d)", path, flags);
+	status = rosetta_msg_fs_open_send(port, path, flags, &err);
 
-	kern_logf("sending message...");
-	status = msg_send(port, 0, &msg, &recv_msg);
-	kern_logf("msg_send: %d", status);
-
-	if (status == KERN_OK) {
-		kern_logf("reply: %s", recv_buf);
+	if (status != KERN_OK) {
+		kern_logf("open call failed (status %d)", status);
+	} else if (err != 0) {
+		kern_logf("open call returned error %d", err);
+	} else {
+		kern_logf("open call succeeded");
 	}
+
 #endif
 	return 0;
 }