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-rw-r--r--kernel/syscall.cpp262
1 files changed, 0 insertions, 262 deletions
diff --git a/kernel/syscall.cpp b/kernel/syscall.cpp
deleted file mode 100644
index e194eb1..0000000
--- a/kernel/syscall.cpp
+++ /dev/null
@@ -1,262 +0,0 @@
-#include <hilbert/kernel/application.hpp>
-#include <hilbert/kernel/framebuffer.hpp>
-#include <hilbert/kernel/paging.hpp>
-#include <hilbert/kernel/input.hpp>
-#include <hilbert/kernel/vfile.hpp>
-
-namespace hilbert::kernel::syscall {
-
- enum file_result : uint64_t {
- file_result_success,
- file_result_bad_file_handle,
- file_result_device_error,
- file_result_file_system_corrupt,
- file_result_out_of_bounds,
- file_result_does_not_exist,
- file_result_directory
- };
-
- bool is_range_owned_by_application(uint64_t start, uint64_t end) {
- auto *app = application::running_app;
- uint64_t pstart = (start / 4096) * 4096;
- uint64_t pend = ((end - 1) / 4096 + 1) * 4096;
- for (uint64_t p = pstart; p < pend; p += 4096)
- if (!app->is_page_owned(p))
- return false;
- return true;
- }
-
- void set_zero(uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx) {
- rax = 0;
- rdi = 0;
- rsi = 0;
- rdx = 0;
- }
-
- void encode_color_syscall(
- uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx
- ) {
- rax = (uint64_t)framebuffer::encode_color(
- rdi & 0xff, (rdi >> 8) & 0xff, (rdi >> 16) & 0xff);
- rdi = 0;
- rsi = 0;
- rdx = 0;
- }
-
- void get_framebuffer_syscall(
- uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx
- ) {
-
- auto *app = application::running_app;
- if (app->framebuffer_vaddr == 0) {
- uint64_t pages_needed =
- (framebuffer::dword_pitch * framebuffer::height * 4 - 1) / 4096 + 1;
- uint64_t vaddr = app->get_free_vaddr_pages(pages_needed);
- for (uint64_t i = 0; i < pages_needed; ++i)
- app->map_page(
- vaddr + i * 4096, framebuffer::paddr + i * 4096, true, false, false);
- app->framebuffer_vaddr = vaddr;
- }
-
- rax = app->framebuffer_vaddr;
- rdi =
- (uint64_t)(uint32_t)framebuffer::width |
- ((uint64_t)(uint32_t)framebuffer::height << 32);
- rsi = (uint32_t)framebuffer::dword_pitch;
- rdx = 0;
-
- }
-
- void open_file_syscall(
- uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx
- ) {
-
- if (!is_range_owned_by_application(rdi, rdi + rsi)) {
- set_zero(rax, rdi, rsi, rdx);
- return;
- }
-
- utility::string path((const char *)rdi, rsi);
- vfile::canon_path cp;
- vfile::canonize_path(path, cp);
-
- set_zero(rax, rdi, rsi, rdx);
-
- vfile::vfile file;
- switch (vfile::lookup_path(cp, file, true)) {
- case storage::fs_result::success:
- break;
- case storage::fs_result::device_error:
- rax = file_result_device_error;
- return;
- case storage::fs_result::fs_corrupt:
- rax = file_result_file_system_corrupt;
- return;
- case storage::fs_result::does_not_exist:
- rax = file_result_does_not_exist;
- return;
- }
-
- if (file.dir_entry.type != storage::file_type::regular_file) {
- rax = file_result_directory;
- return;
- }
-
- unsigned handler =
- application::running_app->open_files.add_new(utility::move(file));
- rax = file_result_success;
- rdi = (uint64_t)handler;
-
- }
-
- void get_file_length_syscall(
- uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx
- ) {
-
- auto &open_files = application::running_app->open_files;
- unsigned handle = (unsigned)rdi;
-
- set_zero(rax, rdi, rsi, rdx);
-
- if (!open_files.has_id(handle)) {
- rax = file_result_bad_file_handle;
- return;
- }
-
- rax = file_result_success;
- rdi = open_files.get(handle).dir_entry.length;
-
- }
-
- void read_from_file_syscall(
- uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx
- ) {
-
- if (!is_range_owned_by_application(rdi, rdi + 32)) {
- set_zero(rax, rdi, rsi, rdx);
- return;
- }
-
- const uint64_t *request = (const uint64_t *)rdi;
- unsigned handle = (unsigned)request[0];
- uint64_t start = request[1];
- uint64_t length = request[2];
- uint64_t buffer_vaddr = request[3];
-
- set_zero(rax, rdi, rsi, rdx);
-
- if (!is_range_owned_by_application(buffer_vaddr, buffer_vaddr + length))
- return;
-
- auto &open_files = application::running_app->open_files;
-
- if (!open_files.has_id(handle))
- rax = file_result_bad_file_handle;
-
- vfile::vfile &file = open_files.get(handle);
-
- if (start + length > file.dir_entry.length)
- rax = file_result_out_of_bounds;
-
- switch (file.read_file(start, length, (void *)buffer_vaddr)) {
- case storage::fs_result::success:
- rax = file_result_success;
- return;
- case storage::fs_result::device_error:
- rax = file_result_device_error;
- return;
- case storage::fs_result::fs_corrupt:
- case storage::fs_result::does_not_exist:
- rax = file_result_file_system_corrupt;
- return;
- }
-
- }
-
- [[noreturn]] void end_this_process_syscall(
- uint64_t &, uint64_t &, uint64_t &, uint64_t &
- ) {
-
- //TODO
- while (1)
- ;
-
- }
-
- void get_new_pages_syscall(
- uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx
- ) {
-
- uint64_t count = rdi;
- set_zero(rax, rdi, rsi, rdx);
-
- auto *app = application::running_app;
- uint64_t vaddr = app->get_free_vaddr_pages(count);
-
- for (uint64_t i = 0; i < count; ++i) {
- uint64_t paddr = paging::take_pram_page();
- app->map_page(vaddr + i * 4096, paddr, true, false, true);
- }
-
- rax = vaddr;
-
- }
-
- void close_file_syscall(
- uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx
- ) {
-
- unsigned handle = rdi;
- set_zero(rax, rdi, rsi, rdx);
- application::running_app->open_files.remove_id(handle);
-
- }
-
- void read_key_packet_syscall(
- uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx
- ) {
-
- set_zero(rax, rdi, rsi, rdx);
-
- asm ("cli");
-
- while (input::key_queue->count == 0)
- asm ("sti\nhlt\ncli");
-
- rax = (uint64_t)input::key_queue->take();
-
- asm ("sti");
-
- }
-
- 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,
- &get_file_length_syscall,
- &read_from_file_syscall,
- &end_this_process_syscall,
- &get_new_pages_syscall,
- &close_file_syscall,
- &read_key_packet_syscall
- };
-
- static constexpr int max_syscall_number = 8;
-
-}
-
-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);
-
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 13:02:53 +0000