feature (syscalls): implemented 'nx_pcreate'

inc/platform/syscall.h

@@ -32,9 +32,12 @@ typedef enum {
     SYSCALL_MEMORY_ACCESS               = 0x0205,
 
     SYSCALL_PROCESS_CREATE              = 0x0301,
-    SYSCALL_PROCESS_ENVFILE             = 0x0302,
-    SYSCALL_PROCESS_START               = 0x0303,
-    SYSCALL_PROCESS_SIGNAL              = 0x0304,
+    SYSCALL_PROCESS_ENV                 = 0x0302,
+    SYSCALL_PROCESS_SIGNAL              = 0x0303,
+    SYSCALL_PROCESS_THREAD_CREATE       = 0x0304,
+    SYSCALL_PROCESS_THREAD_START        = 0x0305,
+    SYSCALL_PROCESS_THREAD_PAUSE        = 0x0306,
+    SYSCALL_PROCESS_THREAD_KILL         = 0x0307,
 
     SYSCALL_RUNTIME_LINKER_OPEN         = 0x0401,
     SYSCALL_RUNTIME_LINKER_CLOSE        = 0x0402,

inc/utils/status.h

@@ -9,7 +9,9 @@ typedef enum {
     STATUS_SUCCESS,
 
     STATUS_PERMISSION_DENIED,
-    STATUS_RESOURCE_NOT_AVAILABLE
+    STATUS_RESOURCE_NOT_AVAILABLE,
+    STATUS_NOT_SUPPORTED,
+    STATUS_GENERIC_ERROR
 } status_E;
 
 extern string_t g_status_code_strings[3];

src/boot/kmain.c

@@ -7,6 +7,7 @@
 #include "boot/config.h"
 #include "platform/interrupts.h"
 #include "platform/gdt.h"
+#include "platform/syscall.h"
 #include "mm/page_frame.h"
 #include "mm/page_map.h"
 #include "mm/region.h"
@@ -64,16 +65,16 @@ void kmain(boot_info_T boot_info) {
 
     log(LOG_INFO, "!=====[ Kernel Initialized ]=====!\n");
 
-    void* buffer = vfs_resolve_path(&g_root_fs, "/initrd/shell.elf")->cache->buffer;
-    elf_executable_T* exec = elf_executable_create(buffer);
-    pid_t proc = process_spawn(PROCESS_KERNEL, "shell", exec, buffer);
+    pid_t pid;
+    syscall_perform(SYSCALL_PROCESS_CREATE, (uint64_t)"/initrd/shell.elf", 0, (uint64_t)&pid, 0);
 
-    process_T* process = scheduler_get_process(proc);
+    process_T* process = scheduler_get_process(pid);
+    thread_start(process->threads);
+
+    scheduler_dump_info(scheduler_get_process(PROCESS_KERNEL), 0);
 
     g_tty->output   = &process->stdin;
     process->stdout = &g_tty->input;
 
-    thread_start(thread_spawn(proc, symbol_resolve_from_name(exec->symbols, exec->num_symbols, "_start")->address + MEM_REGION_PROCESS_EXEC));
-
     CORE_HALT_FOREVER
 }

src/platform/syscall.c

@@ -207,6 +207,44 @@ void syscall_handle_nx_munmap(cpu_state_T* state) {
     state->rax = STATUS_SUCCESS;
 }
 
+void syscall_handle_nx_pcreate(cpu_state_T* state) {
+    string_t path = (string_t)state->rdi;  // arg1
+    uint64_t len  = state->rsi;            // arg2
+    pid_t*   pid  = (pid_t*)state->rdx;    // arg3
+    string_t name = (string_t)state->rcx;  // arg4
+
+    vfs_node_T* node = vfs_resolve_path(&g_root_fs, path);
+    if (node == NULL || node->type != VFS_NODE_FILE) {
+        state->rax = STATUS_RESOURCE_NOT_AVAILABLE;
+        return;
+    }
+
+    uint8_t* buffer = memory_allocate(node->size);
+    vfs_file_read(node, 0, node->size, buffer);
+
+    elf_executable_T* exec = elf_executable_create(buffer);
+    if (exec == NULL) {
+        memory_free(buffer);
+        state->rax = STATUS_NOT_SUPPORTED;
+        return;
+    }
+
+    if (name == NULL) {
+        name = path;
+    }
+
+    *pid = process_spawn(scheduler_get_current_process()->id, name, exec, buffer);
+    if (*pid == PROCESS_NONE) {
+        state->rax = STATUS_GENERIC_ERROR;
+        return;
+    }
+    void* entry = (void*)(symbol_resolve_from_name(exec->symbols, exec->num_symbols, "_start")->address + MEM_REGION_PROCESS_EXEC);
+
+    thread_spawn(*pid, entry);
+
+    state->rax = STATUS_SUCCESS;
+}
+
 
 cpu_state_T* syscall_handle(cpu_state_T* state) {
     cpu_state_T*    return_state = state;
@@ -260,6 +298,12 @@ cpu_state_T* syscall_handle(cpu_state_T* state) {
         }
 
         case SYSCALLS_PROC: {
+            switch (state->rax) {
+                case SYSCALL_PROCESS_CREATE: {
+                    syscall_handle_nx_pcreate(state);
+                    break;
+                }
+            }
             break;
         }