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FEAT: VFS overhaul

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boreddevnl
2026-04-12 17:53:31 +02:00
parent 921e8a5658
commit 700839e6be
48 changed files with 1897 additions and 482 deletions
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29
src/sys/process.c
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@@ -20,7 +20,6 @@ extern void serial_write(const char *str);
#define MAX_PROCESSES 16
#define MAX_CPUS_SCHED 32
process_t processes[MAX_PROCESSES] __attribute__((aligned(16)));
int process_count = 0;
static process_t* current_process[MAX_CPUS_SCHED] = {0}; // Per-CPU
static uint32_t next_pid = 0;
static void *free_kernel_stack_later[MAX_CPUS_SCHED] = {0};
@@ -34,9 +33,10 @@ void process_init(void) {
}
// Current kernel execution is PID 0
process_t *kernel_proc = &processes[process_count++];
process_t *kernel_proc = &processes[0];
kernel_proc->pid = next_pid++;
kernel_proc->is_user = false;
kernel_proc->is_idle = true;
// We don't have its RSP or PML4 yet, but it's already running.
// The timer interrupt will naturally capture its context on the first tick!
@@ -55,21 +55,39 @@ void process_init(void) {
kernel_proc->next = kernel_proc; // Circular linked list
kernel_proc->cpu_affinity = 0; // Kernel always on BSP
mem_memset(kernel_proc->cwd, 0, 1024);
kernel_proc->cwd[0] = '/';
current_process[0] = kernel_proc;
}
process_t* process_create(void (*entry_point)(void), bool is_user) {
uint64_t rflags = spinlock_acquire_irqsave(&runqueue_lock);
if (process_count >= MAX_PROCESSES) {
process_t *new_proc = NULL;
for (int i = 0; i < MAX_PROCESSES; i++) {
if (processes[i].pid == 0xFFFFFFFF) {
new_proc = &processes[i];
break;
}
}
if (!new_proc) {
spinlock_release_irqrestore(&runqueue_lock, rflags);
return NULL;
}
process_t *new_proc = &processes[process_count++];
new_proc->pid = next_pid++;
new_proc->is_user = is_user;
process_t *parent = process_get_current();
if (parent) {
extern void mem_memcpy(void *dest, const void *src, size_t len);
mem_memcpy(new_proc->cwd, parent->cwd, 1024);
} else {
mem_memset(new_proc->cwd, 0, 1024);
new_proc->cwd[0] = '/';
}
// 1. Setup Page Table
if (is_user) {
new_proc->pml4_phys = paging_create_user_pml4_phys();
@@ -163,9 +181,8 @@ process_t* process_create_elf(const char* filepath, const char* args_str) {
// Find an available slot
for (int i = 0; i < MAX_PROCESSES; i++) {
if (processes[i].pid == 0xFFFFFFFF || i >= process_count) {
if (processes[i].pid == 0xFFFFFFFF) {
new_proc = &processes[i];
if (i >= process_count) process_count = i + 1;
break;
}
}