743 lines
20 KiB
C++
743 lines
20 KiB
C++
#include <hilbert/kernel/application.hpp>
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#include <hilbert/kernel/framebuffer.hpp>
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#include <hilbert/kernel/load-app.hpp>
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#include <hilbert/kernel/paging.hpp>
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#include <hilbert/kernel/input.hpp>
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#include <hilbert/kernel/panic.hpp>
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#include <hilbert/kernel/vfile.hpp>
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namespace hilbert::kernel::syscall {
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enum file_result : uint64_t {
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file_result_success,
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file_result_bad_file_handle,
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file_result_device_error,
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file_result_file_system_corrupt,
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file_result_out_of_bounds,
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file_result_does_not_exist,
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file_result_directory
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};
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void set_zero(uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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rax = 0;
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rdi = 0;
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rsi = 0;
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rdx = 0;
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}
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void encode_color_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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rax = (uint64_t)framebuffer::encode_color(
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rdi & 0xff, (rdi >> 8) & 0xff, (rdi >> 16) & 0xff);
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rdi = 0;
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rsi = 0;
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rdx = 0;
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}
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void get_framebuffer_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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auto *process = application::running_thread->owner;
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if (process->framebuffer_vaddr == 0) {
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uint64_t pages_needed =
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(framebuffer::dword_pitch * framebuffer::height * 4 - 1) / 4096 + 1;
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uint64_t vaddr = process->memory->get_free_vaddr_pages(pages_needed);
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for (uint64_t i = 0; i < pages_needed; ++i)
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process->memory->map_page(
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vaddr + i * 4096, framebuffer::paddr + i * 4096, true, false, false);
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process->framebuffer_vaddr = vaddr;
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}
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rax = process->framebuffer_vaddr;
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rdi =
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(uint64_t)(uint32_t)framebuffer::width |
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((uint64_t)(uint32_t)framebuffer::height << 32);
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rsi = (uint32_t)framebuffer::dword_pitch;
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rdx = 0;
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}
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void open_file_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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const char *path = (const char *)rdi;
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uint64_t path_length = rsi;
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bool allow_creation = rdx & 1;
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bool only_allow_creation = rdx & 2;
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set_zero(rax, rdi, rsi, rdx);
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auto *process = application::running_thread->owner;
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if (!process->memory->valid_to_read(path, path + path_length, false))
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return;
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utility::string path_string(path, path_length);
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vfile::canon_path cp;
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vfile::vfile file;
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vfile::canonize_path(path_string, cp);
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switch (vfile::look_up_path(cp, file, true)) {
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case storage::fs_result::device_error:
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case storage::fs_result::fs_corrupt:
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rax = (uint64_t)application::stream_result::io_error;
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return;
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case storage::fs_result::does_not_exist:
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if (!allow_creation) {
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rax = (uint64_t)application::stream_result::does_not_exist;
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return;
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}
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//TODO: create the file
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panic(0x9af5e6);
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case storage::fs_result::success:
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if (only_allow_creation) {
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rax = (uint64_t)application::stream_result::already_exists;
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return;
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}
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if (file.dir_entry.type != storage::file_type::regular_file) {
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rax = (uint64_t)application::stream_result::not_a_regular_file;
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return;
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}
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rdi = process->add_file_stream(new application::file_stream {
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.the_file = utility::move(file), .offset = 0 });
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rax = (uint64_t)application::stream_result::success;
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}
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}
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void end_this_thread_syscall(
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uint64_t &, uint64_t &rdi, uint64_t &, uint64_t &) {
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int exit_code = (int)(uint32_t)rdi;
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auto *t = application::running_thread;
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t->on_end_thread();
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t->owner->notify_thread_ended(t, exit_code);
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delete t;
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application::resume_next_thread();
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}
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void get_new_pages_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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uint64_t count = rdi;
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set_zero(rax, rdi, rsi, rdx);
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auto *p = application::running_thread->owner;
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uint64_t vaddr = p->memory->get_free_vaddr_pages(count);
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for (uint64_t i = 0; i < count; ++i) {
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uint64_t kvaddr;
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uint64_t paddr;
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paging::map_new_kernel_page(kvaddr, paddr);
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for (int i = 0; i < 4096; ++i)
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((uint8_t *)kvaddr)[i] = 0;
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paging::unmap_kernel_page((uint64_t)kvaddr);
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p->memory->map_page(vaddr + i * 4096, paddr, true, false, true);
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}
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rax = vaddr;
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}
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void get_input_packet_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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set_zero(rax, rdi, rsi, rdx);
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while (input::input_queue->count == 0)
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application::running_thread->wait_for_input();
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input::input_packet packet = input::input_queue->take();
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if (packet.is_mouse) {
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rax = packet.mouse.buttons | 0x80;
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rdi = (uint16_t)packet.mouse.x_change;
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rsi = (uint16_t)packet.mouse.y_change;
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}
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else {
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rax = 0;
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rdi = packet.keyboard;
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}
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}
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void create_socket(
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application::process *p1, application::process *p2,
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application::socket_stream_end *&se1_out,
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application::socket_stream_end *&se2_out) {
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application::socket *s = new application::socket();
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se1_out = new application::socket_stream_end {
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.the_socket = s, .read_queue = s->queue_1, .write_queue = s->queue_2,
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.waiting_to_read = utility::queue<application::thread *>(),
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.is_other_side_open = true, .other_process = p2, .other_end = 0 };
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se2_out = new application::socket_stream_end {
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.the_socket = s, .read_queue = s->queue_2, .write_queue = s->queue_2,
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.waiting_to_read = utility::queue<application::thread *>(),
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.is_other_side_open = true, .other_process = p1, .other_end = se1_out };
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se1_out->other_end = se2_out;
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}
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void create_private_socket_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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set_zero(rax, rdi, rsi, rdx);
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auto *p = application::running_thread->owner;
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application::socket_stream_end *se1, *se2;
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create_socket(p, p, se1, se2);
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rax = p->add_socket_stream(se1);
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rdi = p->add_socket_stream(se2);
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}
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void create_socket_listener_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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auto *p = application::running_thread->owner;
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const char *id = (const char *)rdi;
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uint64_t id_length = rsi;
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set_zero(rax, rdi, rsi, rdx);
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if (!p->memory->valid_to_read(id, id + id_length, false))
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return;
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auto *sl =
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application::try_register_socket_listener(
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utility::string(id, id_length));
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if (sl) {
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rdx = p->add_socket_listener(sl);
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rax = (uint64_t)application::stream_result::success;
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}
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else
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rax = (uint64_t)application::stream_result::socket_id_already_in_use;
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}
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void stop_socket_listener_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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unsigned handle = (unsigned)rdi;
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set_zero(rax, rdi, rsi, rdx);
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auto *sl =
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application::running_thread->owner->take_socket_listener(handle);
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if (!sl)
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return;
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while (sl->waiting_to_accept.count > 0)
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sl->waiting_to_accept.take()->notify_no_socket_stream();
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while (sl->waiting_to_connect.count > 0)
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sl->waiting_to_connect.take()->notify_no_socket_stream();
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application::remove_socket_listener(sl);
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}
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void accept_socket_connection_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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unsigned handle = (unsigned)rdi;
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set_zero(rax, rdi, rsi, rdx);
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auto *t = application::running_thread;
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auto *sl = t->owner->get_socket_listener(handle);
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if (!sl) {
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rax = (uint64_t)application::stream_result::bad_handle;
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return;
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}
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if (sl->waiting_to_connect.count > 0) {
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auto *ot = sl->waiting_to_connect.take();
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application::socket_stream_end *our_end, *their_end;
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create_socket(t->owner, ot->owner, our_end, their_end);
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unsigned our_handle = t->owner->add_socket_stream(our_end);
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unsigned their_handle = ot->owner->add_socket_stream(their_end);
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ot->notify_new_socket_stream(their_handle);
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rax = (uint64_t)application::stream_result::success;
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rdi = our_handle;
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}
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else {
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auto result = t->wait_to_accept_from(sl);
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if (result.has_value) {
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rax = (uint64_t)application::stream_result::success;
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rdi = result.value;
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}
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else
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rax = (uint64_t)application::stream_result::socket_listener_closed;
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}
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}
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void connect_to_socket_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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const char *id = (const char *)rdi;
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uint64_t id_length = rsi;
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set_zero(rax, rdi, rsi, rdx);
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auto *t = application::running_thread;
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if (!t->owner->memory->valid_to_read(id, id + id_length, false))
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return;
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utility::string id_string(id, id_length);
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auto *sl = application::try_get_socket_listener(id_string);
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if (!sl) {
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rax = (uint64_t)application::stream_result::socket_id_not_in_use;
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return;
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}
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if (sl->waiting_to_accept.count > 0) {
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auto *ot = sl->waiting_to_accept.take();
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application::socket_stream_end *our_end, *their_end;
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create_socket(t->owner, ot->owner, our_end, their_end);
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unsigned our_handle = t->owner->add_socket_stream(our_end);
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unsigned their_handle = ot->owner->add_socket_stream(their_end);
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ot->notify_new_socket_stream(their_handle);
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rax = (uint64_t)application::stream_result::success;
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rdi = our_handle;
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}
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else {
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auto result = t->wait_to_connect_to(sl);
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if (result.has_value) {
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rax = (uint64_t)application::stream_result::success;
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rdi = result.value;
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}
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else
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rax = (uint64_t)application::stream_result::socket_listener_closed;
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}
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}
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void close_stream_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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unsigned handle = (unsigned)rdi;
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set_zero(rax, rdi, rsi, rdx);
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application::running_thread->owner->close_stream(handle);
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}
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void seek_stream_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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unsigned handle = (unsigned)rdi;
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uint8_t origin = (uint8_t)rsi;
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int64_t offset = (int64_t)rdx;
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set_zero(rax, rdi, rsi, rdx);
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if (origin >= 3)
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return;
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auto stream = application::running_thread->owner->get_stream(handle);
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if (stream.is_null()) {
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rax = (uint64_t)application::stream_result::bad_handle;
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return;
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}
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if (stream.is_socket) {
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rax = (uint64_t)application::stream_result::not_seekable;
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return;
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}
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auto *fs = stream.as_file_stream;
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switch (origin) {
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case 0://beginning
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if (offset < 0 || (uint64_t)offset > fs->the_file.dir_entry.length) {
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rax = (uint64_t)application::stream_result::out_of_bounds;
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return;
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}
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fs->offset = offset;
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rax = (uint64_t)application::stream_result::success;
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return;
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case 1://end
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if (offset > 0 || (uint64_t)-offset > fs->the_file.dir_entry.length) {
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rax = (uint64_t)application::stream_result::out_of_bounds;
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return;
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}
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fs->offset = fs->the_file.dir_entry.length + offset;
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rax = (uint64_t)application::stream_result::success;
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return;
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case 2://current position
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int64_t new_offset = offset + fs->offset;
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if (new_offset < 0 || (uint64_t)new_offset > fs->the_file.dir_entry.length) {
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rax = (uint64_t)application::stream_result::out_of_bounds;
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return;
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}
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fs->offset = (uint64_t)new_offset;
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rax = (uint64_t)application::stream_result::success;
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return;
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}
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}
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void read_from_stream_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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unsigned handle = (unsigned)rdi;
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uint64_t count = (uint64_t)rsi;
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uint8_t *buffer = (uint8_t *)rdx;
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set_zero(rax, rdi, rsi, rdx);
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auto *t = application::running_thread;
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if (!t->owner->memory->valid_to_read(buffer, buffer + count, true))
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return;
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auto stream = t->owner->get_stream(handle);
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if (stream.is_null()) {
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rax = (uint64_t)application::stream_result::bad_handle;
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return;
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}
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if (stream.is_socket) {
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auto *ss = stream.as_socket_stream;
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for (uint64_t i = 0; i < count; ++i) {
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while (ss->read_queue.count == 0) {
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if (!ss->is_other_side_open) {
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rax = (uint64_t)application::stream_result::other_end_closed;
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return;
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}
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t->wait_for_socket_stream(ss);
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}
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buffer[i] = ss->read_queue.take();
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}
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rax = (uint64_t)application::stream_result::success;
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}
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else {
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auto *fs = stream.as_file_stream;
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if (fs->offset + count > fs->the_file.dir_entry.length) {
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rax = (uint64_t)application::stream_result::out_of_bounds;
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return;
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}
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auto read_result = fs->the_file.read_file(fs->offset, count, buffer);
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if (read_result != storage::fs_result::success) {
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rax = (uint64_t)application::stream_result::io_error;
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return;
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}
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fs->offset += count;
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rax = (uint64_t)application::stream_result::success;
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}
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}
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void write_to_stream_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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unsigned handle = (unsigned)rdi;
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uint64_t count = (uint64_t)rsi;
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const uint8_t *buffer = (uint8_t *)rdx;
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set_zero(rax, rdi, rsi, rdx);
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auto *t = application::running_thread;
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if (!t->owner->memory->valid_to_read(buffer, buffer + count, false))
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return;
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auto stream = t->owner->get_stream(handle);
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if (stream.is_null()) {
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rax = (uint64_t)application::stream_result::bad_handle;
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return;
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}
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if (stream.is_socket) {
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auto *ss = stream.as_socket_stream;
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if (!ss->is_other_side_open) {
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rax = (uint64_t)application::stream_result::other_end_closed;
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return;
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}
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for (uint64_t i = 0; i < count; ++i)
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ss->write_queue.insert(buffer[i]);
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rax = (uint64_t)application::stream_result::success;
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}
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else {
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//TODO: write to file
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panic(0x9af5e6);
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}
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}
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void get_stream_length_syscall(
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uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
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unsigned handle = (unsigned)rdi;
|
|
set_zero(rax, rdi, rsi, rdx);
|
|
|
|
auto *t = application::running_thread;
|
|
|
|
auto stream = t->owner->get_stream(handle);
|
|
|
|
if (stream.is_null())
|
|
rax = (uint64_t)application::stream_result::bad_handle;
|
|
|
|
else if (stream.is_socket)
|
|
rax = (uint64_t)application::stream_result::not_sized;
|
|
|
|
else {
|
|
rdi = stream.as_file_stream->the_file.dir_entry.length;
|
|
rax = (uint64_t)application::stream_result::success;
|
|
}
|
|
|
|
}
|
|
|
|
struct env_var_spec {
|
|
uint64_t name_len;
|
|
const char *name;
|
|
uint64_t value_len;
|
|
const char *value;
|
|
};
|
|
|
|
struct gstream_spec {
|
|
uint64_t parent_handle;
|
|
uint64_t child_handle;
|
|
};
|
|
|
|
struct psi_spec {
|
|
uint64_t path_len;
|
|
const char *path;
|
|
uint64_t env_var_count;
|
|
const env_var_spec *env_vars;
|
|
uint64_t gstream_count;
|
|
const gstream_spec *gstreams;
|
|
};
|
|
|
|
void start_process_syscall(
|
|
uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
|
|
|
|
const psi_spec *psi = (const psi_spec *)rdi;
|
|
set_zero(rax, rdi, rsi, rdx);
|
|
|
|
auto *owner = application::running_thread->owner;
|
|
|
|
if (!owner->memory->valid_to_read(psi, psi + 1, false) ||
|
|
!owner->memory->valid_to_read(
|
|
psi->path, psi->path + psi->path_len, false) ||
|
|
!owner->memory->valid_to_read(
|
|
psi->env_vars, psi->env_vars + psi->env_var_count, false) ||
|
|
!owner->memory->valid_to_read(
|
|
psi->gstreams, psi->gstreams + psi->gstream_count, false))
|
|
return;
|
|
|
|
for (uint64_t i = 0; i < psi->env_var_count; ++i)
|
|
if (!owner->memory->valid_to_read(psi->env_vars[i].name,
|
|
psi->env_vars[i].name + psi->env_vars[i].name_len, false) ||
|
|
!owner->memory->valid_to_read(psi->env_vars[i].value,
|
|
psi->env_vars[i].value + psi->env_vars[i].value_len, false))
|
|
return;
|
|
|
|
for (uint64_t i = 0; i < psi->gstream_count; ++i) {
|
|
auto owner_stream = owner->get_stream(psi->gstreams[i].parent_handle);
|
|
if (owner_stream.is_null() || (owner_stream.is_socket &&
|
|
owner_stream.as_socket_stream->waiting_to_read.count != 0) ||
|
|
psi->gstreams[i].child_handle >= 65536)
|
|
return;
|
|
}
|
|
|
|
utility::string path_string(psi->path, psi->path_len);
|
|
vfile::canon_path cpath;
|
|
vfile::canonize_path(path_string, cpath);
|
|
|
|
vfile::vfile file;
|
|
auto lookup_result = vfile::look_up_path(cpath, file, true);
|
|
switch (lookup_result) {
|
|
case storage::fs_result::does_not_exist:
|
|
rax = (uint64_t)application::stream_result::does_not_exist;
|
|
return;
|
|
case storage::fs_result::device_error:
|
|
case storage::fs_result::fs_corrupt:
|
|
rax = (uint64_t)application::stream_result::io_error;
|
|
return;
|
|
case storage::fs_result::success:
|
|
break;
|
|
}
|
|
|
|
app_memory *memory = new app_memory();
|
|
uint64_t entry_point;
|
|
load_app_result load_result = load_app(file, *memory, entry_point);
|
|
|
|
switch (load_result) {
|
|
case load_app_result::io_error:
|
|
rax = (uint64_t)application::stream_result::io_error;
|
|
delete memory;
|
|
return;
|
|
case load_app_result::not_app:
|
|
rax = (uint64_t)application::stream_result::not_an_executable;
|
|
delete memory;
|
|
return;
|
|
case load_app_result::success:
|
|
break;
|
|
}
|
|
|
|
application::process *p = new application::process(memory);
|
|
|
|
for (uint64_t i = 0; i < psi->env_var_count; ++i)
|
|
p->add_environment_variable(
|
|
utility::string(psi->env_vars[i].name, psi->env_vars[i].name_len),
|
|
utility::string(psi->env_vars[i].value, psi->env_vars[i].value_len));
|
|
|
|
for (uint64_t i = 0; i < psi->gstream_count; ++i) {
|
|
auto s = owner->take_stream(psi->gstreams[i].parent_handle);
|
|
if (s.is_socket && s.as_socket_stream->is_other_side_open)
|
|
s.as_socket_stream->other_end->other_process = p;
|
|
p->add_stream_with_handle(psi->gstreams[i].child_handle, s);
|
|
}
|
|
|
|
rax = (uint64_t)application::stream_result::success;
|
|
rdi = application::add_process(p);
|
|
application::thread *t = new application::thread(p, entry_point);
|
|
p->add_thread(t);
|
|
application::paused_threads->insert(t);
|
|
|
|
}
|
|
|
|
void end_this_process_syscall(
|
|
uint64_t &, uint64_t &rdi, uint64_t &, uint64_t &) {
|
|
|
|
int exit_code = (int32_t)(uint32_t)rdi;
|
|
auto *p = application::running_thread->owner;
|
|
p->on_end_process(exit_code);
|
|
application::resume_next_thread();
|
|
|
|
}
|
|
|
|
void set_stream_length_syscall(
|
|
uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
|
|
|
|
unsigned handle = (unsigned)rdi;
|
|
set_zero(rax, rdi, rsi, rdx);
|
|
|
|
auto *t = application::running_thread;
|
|
|
|
auto stream = t->owner->get_stream(handle);
|
|
|
|
if (stream.is_null())
|
|
rax = (uint64_t)application::stream_result::bad_handle;
|
|
|
|
else if (stream.is_socket)
|
|
rax = (uint64_t)application::stream_result::not_sized;
|
|
|
|
else {
|
|
//TODO
|
|
panic(0x9af5e6);
|
|
}
|
|
|
|
}
|
|
|
|
void get_other_end_process_handle_syscall(
|
|
uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
|
|
|
|
unsigned handle = (unsigned)rdi;
|
|
set_zero(rax, rdi, rsi, rdx);
|
|
|
|
auto *t = application::running_thread;
|
|
|
|
auto stream = t->owner->get_stream(handle);
|
|
|
|
if (stream.is_null())
|
|
rax = (uint64_t)application::stream_result::bad_handle;
|
|
|
|
else if (!stream.is_socket)
|
|
rax = (uint64_t)application::stream_result::other_end_closed;
|
|
|
|
else {
|
|
auto s = stream.as_socket_stream;
|
|
if (!s->is_other_side_open)
|
|
rax = (uint64_t)application::stream_result::other_end_closed;
|
|
else {
|
|
rax = (uint64_t)application::stream_result::success;
|
|
rdi = (uint64_t)s->other_process->id;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
typedef void (*syscall_handler)(
|
|
uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx);
|
|
|
|
syscall_handler handlers[] = {
|
|
&encode_color_syscall,
|
|
&get_framebuffer_syscall,
|
|
&open_file_syscall,
|
|
&end_this_thread_syscall,
|
|
&get_new_pages_syscall,
|
|
&get_input_packet_syscall,
|
|
&create_private_socket_syscall,
|
|
&create_socket_listener_syscall,
|
|
&stop_socket_listener_syscall,
|
|
&accept_socket_connection_syscall,
|
|
&connect_to_socket_syscall,
|
|
&close_stream_syscall,
|
|
&seek_stream_syscall,
|
|
&read_from_stream_syscall,
|
|
&write_to_stream_syscall,
|
|
&get_stream_length_syscall,
|
|
&start_process_syscall,
|
|
&end_this_process_syscall,
|
|
&set_stream_length_syscall,
|
|
&get_other_end_process_handle_syscall
|
|
};
|
|
|
|
static constexpr int max_syscall_number = 19;
|
|
|
|
}
|
|
|
|
using namespace hilbert::kernel::syscall;
|
|
|
|
extern "C" void do_syscall(
|
|
uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
|
|
|
|
if (rax <= max_syscall_number && handlers[rax] != 0)
|
|
handlers[rax](rax, rdi, rsi, rdx);
|
|
else
|
|
set_zero(rax, rdi, rsi, rdx);
|
|
|
|
}
|