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boreddevnl
2026-03-03 20:34:50 +01:00
parent 8b3ca448ed
commit 3c7d36a50f
42 changed files with 5841 additions and 78 deletions
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26
src/kernel/process.c
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@@ -15,7 +15,7 @@ extern void cmd_write(const char *str);
extern void serial_write(const char *str);
#define MAX_PROCESSES 16
static process_t processes[MAX_PROCESSES];
static process_t processes[MAX_PROCESSES] __attribute__((aligned(16)));
static int process_count = 0;
static process_t* current_process = NULL;
static uint32_t next_pid = 0;
@@ -31,6 +31,10 @@ void process_init(void) {
kernel_proc->pml4_phys = paging_get_pml4_phys();
kernel_proc->kernel_stack = 0;
// Initialize FPU state for kernel
asm volatile("fxsave %0" : "=m"(kernel_proc->fpu_state));
kernel_proc->fpu_initialized = true;
for (int i = 0; i < MAX_PROCESS_FDS; i++) kernel_proc->fds[i] = NULL;
kernel_proc->next = kernel_proc; // Circular linked list
@@ -101,6 +105,11 @@ void process_create(void* entry_point, bool is_user) {
new_proc->kernel_stack = 0;
new_proc->rsp = (uint64_t)stack_ptr;
}
// Initialize FPU state for new process
asm volatile("fninit");
asm volatile("fxsave %0" : "=m"(new_proc->fpu_state));
new_proc->fpu_initialized = true;
// Add to linked list
new_proc->next = current_process->next;
@@ -260,6 +269,11 @@ process_t* process_create_elf(const char* filepath, const char* args_str) {
new_proc->user_stack_alloc = stack;
new_proc->rsp = (uint64_t)stack_ptr;
// Initialize FPU state for new process
asm volatile("fninit");
asm volatile("fxsave %0" : "=m"(new_proc->fpu_state));
new_proc->fpu_initialized = true;
// Slot is already counted in process_count if new, or reused.
// Add to linked list
@@ -285,8 +299,18 @@ uint64_t process_schedule(uint64_t current_rsp) {
// Save context
current_process->rsp = current_rsp;
// Save FPU state
if (current_process->fpu_initialized) {
asm volatile("fxsave %0" : "=m"(current_process->fpu_state));
}
// Switch process
current_process = current_process->next;
// Restore FPU state
if (current_process->fpu_initialized) {
asm volatile("fxrstor %0" : : "m"(current_process->fpu_state));
}
// Update Kernel Stack for User Mode interrupts and System Calls
if (current_process->is_user && current_process->kernel_stack) {