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CheckP: smp support

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boreddevnl
2026-03-17 21:44:21 +01:00
parent 7eb55f3a59
commit a7c3cccce7
11 changed files with 593 additions and 99 deletions
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28
src/sys/process.c
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@@ -10,6 +10,7 @@
#include "memory_manager.h"
#include "elf.h"
#include "wm.h"
#include "spinlock.h"
extern void cmd_write(const char *str);
extern void serial_write(const char *str);
@@ -20,6 +21,7 @@ int process_count = 0;
static process_t* current_process = NULL;
static uint32_t next_pid = 0;
static void *free_kernel_stack_later = NULL;
static spinlock_t runqueue_lock = SPINLOCK_INIT;
void process_init(void) {
for (int i = 0; i < MAX_PROCESSES; i++) {
@@ -132,11 +134,10 @@ void process_create(void* entry_point, bool is_user) {
new_proc->fpu_initialized = true;
// Add to linked list (Critical Section)
uint64_t rflags;
asm volatile("pushfq; pop %0; cli" : "=r"(rflags));
uint64_t rflags = spinlock_acquire_irqsave(&runqueue_lock);
new_proc->next = current_process->next;
current_process->next = new_proc;
asm volatile("push %0; popfq" : : "r"(rflags));
spinlock_release_irqrestore(&runqueue_lock, rflags);
}
process_t* process_create_elf(const char* filepath, const char* args_str) {
@@ -316,11 +317,10 @@ process_t* process_create_elf(const char* filepath, const char* args_str) {
new_proc->fpu_initialized = true;
// Add to linked list (Critical Section)
uint64_t rflags;
asm volatile("pushfq; pop %0; cli" : "=r"(rflags));
uint64_t rflags = spinlock_acquire_irqsave(&runqueue_lock);
new_proc->next = current_process->next;
current_process->next = new_proc;
asm volatile("push %0; popfq" : : "r"(rflags));
spinlock_release_irqrestore(&runqueue_lock, rflags);
serial_write("[PROCESS] Spawned ELF Executable: ");
serial_write(filepath);
@@ -411,8 +411,7 @@ static void process_cleanup_inner(process_t *proc) {
void process_terminate(process_t *to_delete) {
if (!to_delete || to_delete->pid == 0xFFFFFFFF || to_delete->pid == 0) return;
uint64_t rflags;
asm volatile("pushfq; pop %0; cli" : "=r"(rflags));
uint64_t rflags = spinlock_acquire_irqsave(&runqueue_lock);
process_cleanup_inner(to_delete);
@@ -424,7 +423,7 @@ void process_terminate(process_t *to_delete) {
if (prev == to_delete) {
// Only one process (should be kernel), cannot terminate.
asm volatile("push %0; popfq" : : "r"(rflags));
spinlock_release_irqrestore(&runqueue_lock, rflags);
return;
}
@@ -459,15 +458,14 @@ void process_terminate(process_t *to_delete) {
to_delete->kernel_stack_alloc = NULL;
to_delete->pml4_phys = 0;
asm volatile("push %0; popfq" : : "r"(rflags));
spinlock_release_irqrestore(&runqueue_lock, rflags);
}
uint64_t process_terminate_current(void) {
uint64_t rflags;
asm volatile("pushfq; pop %0; cli" : "=r"(rflags));
uint64_t rflags = spinlock_acquire_irqsave(&runqueue_lock);
if (!current_process || current_process->pid == 0) {
asm volatile("push %0; popfq" : : "r"(rflags));
spinlock_release_irqrestore(&runqueue_lock, rflags);
return 0;
}
@@ -484,7 +482,7 @@ uint64_t process_terminate_current(void) {
if (prev == current_process) {
// Only one process (should be kernel), cannot terminate.
asm volatile("push %0; popfq" : : "r"(rflags));
spinlock_release_irqrestore(&runqueue_lock, rflags);
return to_delete->rsp;
}
@@ -520,7 +518,7 @@ uint64_t process_terminate_current(void) {
to_delete->pml4_phys = 0;
uint64_t next_rsp = current_process->rsp;
asm volatile("push %0; popfq" : : "r"(rflags));
spinlock_release_irqrestore(&runqueue_lock, rflags);
return next_rsp;
}