pctl Add kill command

kernel/Makefile

@@ -53,8 +53,6 @@ SRCFILES += $(call GRABSRC, \
               fs/portlfs \
               baseimg \
               proc \
-              proc/kproc \
-              proc/serialproc \
               hal \
               hal/$(ARCH) \
               std \

kernel/proc/kproc/kproc.c

@@ -1,16 +0,0 @@
-#include <stdint.h>
-#include "proc/proc.h"
-#include "hal/hal.h"
-#include "ipc/pipe/pipe.h"
-#include "kprintf.h"
-
-Proc *KPROC;
-
-void kproc_init(Proc *proc) {
-  KPROC = proc;
-}
-
-void kproc_fn(void) {
-  for (;;) {
-  }
-}

kernel/proc/kproc/kproc.h

@@ -1,11 +0,0 @@
-#ifndef PROC_KPROC_KPROC_H_
-#define PROC_KPROC_KPROC_H_
-
-#include "proc/proc.h"
-
-extern Proc *KPROC;
-
-void kproc_fn(void);
-void kproc_init(Proc *proc);
-
-#endif // PROC_KPROC_KPROC_H_

kernel/proc/proc.c

@@ -13,8 +13,6 @@
 #include "vfs/vfs.h"
 #include "bootinfo/bootinfo.h"
 #include "ipc/pipe/pipe.h"
-#include "kproc/kproc.h"
-#include "serialproc/serialproc.h"
 #include "sysdefs/processctl.h"
 
 #define PROC_REAPER_FREQ 30
@@ -75,41 +73,6 @@ ElfAuxval proc_load_elf_segs(Proc *proc, uint8_t *data) {
   return aux;
 }
 
-Proc *proc_spawnkern(void (*ent)(void), char *name) {
-  if (pids >= PROC_MAX) {
-    return NULL;
-  }
-
-  Proc *proc = dlmalloc(sizeof(*proc));
-  if (proc == NULL) {
-    return NULL;
-  }
-  hal_memset(proc, 0, sizeof(*proc));
-  hal_memcpy(proc->name, name, PROC_NAME_MAX);
-
-  proc->kern = true;
-
-  uint8_t *pstackp = (uint8_t *)pmm_alloc(PROC_STACKBLOCKS) + PROC_STACKSIZE;
-  uint8_t *kstackp = (uint8_t *)pmm_alloc(PROC_STACKBLOCKS) + PROC_STACKSIZE;
-  proc->platformdata.kstack = kstackp;
-  proc->platformdata.pstack = pstackp;
-
-  hal_memset(&proc->platformdata.trapframe, 0, sizeof(proc->platformdata.trapframe));
-
-  proc->platformdata.trapframe.ss = 0x10;
-  proc->platformdata.trapframe.rsp = (uint64_t)VIRT(pstackp);
-  proc->platformdata.trapframe.rflags = 0x202;
-  proc->platformdata.trapframe.cs = 0x08;
-  proc->platformdata.trapframe.rip = (uint64_t)ent;
-  proc->platformdata.cr3 = KERNEL_CR3;
-  proc->state = PROC_EMBRYO;
-  proc->pid = pids++;
-  spinlock_init(&proc->bcast_pipes.spinlock);
-  spinlock_init(&proc->pipes_spinlock);
-
-  return proc;
-}
-
 Proc *proc_spawnuser(char *mountpoint, char *path) {
   VfsObj *vobj = vfs_open(mountpoint, path, VFS_FLAG_READ);
   if (vobj == NULL) {
@@ -237,7 +200,6 @@ void proc_reaper(void) {
     pmm_free((uintptr_t)(zombie->platformdata.kstack - PROC_STACKSIZE), PROC_STACKBLOCKS);
     pmm_free((uintptr_t)(zombie->platformdata.pstack - PROC_STACKSIZE), PROC_STACKBLOCKS);
     
-    if (!zombie->kern) {
     VasRange *vas, *vastmp;
     LL_FOREACH_SAFE(zombie->vas, vas, vastmp) {
       hal_vmm_unmap_range(zombie->platformdata.cr3, vas->virtstart, vas->physstart, vas->size);
@@ -252,7 +214,6 @@ void proc_reaper(void) {
       dlfree(arg->string);
       dlfree(arg);
     }
-    }
     dlfree(zombie);
   }
   spinlock_release(&PROCS.spinlock);
@@ -287,22 +248,6 @@ void proc_killself(void) {
   spinlock_release(&PROCS.spinlock);
 }
 
-void proc_status(void) {
-  static const char *statuses[] = {"ready", "running", "zombie", "waiting"};
-  for (;;) {
-    spinlock_acquire(&PROCS.spinlock);
-    Proc *head = PROCS.procs;
-    while (head) {
-      kprintf("%s %s %s\n", head->kern ? "kern" : "user", statuses[head->state], head->name);
-      head = head->next;
-    }
-    kprintf("\n\n");
-    spinlock_release(&PROCS.spinlock);
-  
-    hal_wait(3 * 1000);
-  }
-}
-
 void proc_init(void) {
   spinlock_init(&PROCS.spinlock);
   PROCS.procs = NULL;

kernel/proc/proc.h

@@ -54,8 +54,6 @@ typedef struct Proc {
   uint8_t state;
   VasRange *vas;
 
-  bool kern;
-
   VfsObj *vobjs[PROC_VFSHANDLES_MAX];
   uint64_t vobjcnt;
 
@@ -88,7 +86,6 @@ extern Procs PROCS;
 
 void proc_init(void);
 void proc_register(Proc *proc);
-Proc *proc_spawnkern(void (*ent)(void), char *name);
 Proc *proc_spawnuser(char *mountpoint, char *path);
 void proc_sched(void *cpustate);
 void proc_killself(void);

kernel/proc/serialproc/serialproc.c

@@ -1,79 +0,0 @@
-#include <stdint.h>
-#include <stddef.h>
-#include "proc/proc.h"
-#include "ipc/pipe/pipe.h"
-#include "hal/hal.h"
-#include "dlmalloc/malloc.h"
-
-#define SERIAL_PORT 0x3f8
-
-Proc *SERIALPROC;
-
-void serialproc_init(Proc *proc) {
-  SERIALPROC = proc;
-  SERIALPROC->pipes[0] = dlmalloc(sizeof(IpcPipe));
-  ipc_pipeinit(SERIALPROC->pipes[0], SERIALPROC->pid);
-  SERIALPROC->pipes[1] = dlmalloc(sizeof(IpcPipe));
-  ipc_pipeinit(SERIALPROC->pipes[1], SERIALPROC->pid);
-  
-  io_out8(SERIAL_PORT + 1, 0x00); 
-  io_out8(SERIAL_PORT + 3, 0x80); 
-  io_out8(SERIAL_PORT + 0, 0x03);
-  io_out8(SERIAL_PORT + 1, 0x00);
-  io_out8(SERIAL_PORT + 3, 0x03);
-  io_out8(SERIAL_PORT + 2, 0xc7);
-  io_out8(SERIAL_PORT + 4, 0x0b);
-  io_out8(SERIAL_PORT + 4, 0x1e);
-  io_out8(SERIAL_PORT + 0, 0xae);
-
-  if (io_in8(SERIAL_PORT + 0) != 0xae) {
-    return;
-  }
-
-  io_out8(SERIAL_PORT + 4, 0x0f);
-}
-
-int serialproc_received(void) {
-  return io_in8(SERIAL_PORT + 5) & 1;
-}
-
-uint8_t serialproc_read(void) {
-  while (serialproc_received() == 0);
-  return io_in8(SERIAL_PORT);
-}
-
-int serialproc_trans_empty(void) {
-  return io_in8(SERIAL_PORT + 5) & 0x20;
-}
-
-void serialproc_write(uint8_t value) {
-  while (!serialproc_trans_empty());
-  io_out8(SERIAL_PORT, value);
-}
-
-void serialproc_fn(void) {
-  char buf[0x100];
-  for (;;) {
-
-    hal_memset(buf, 0, sizeof(buf));
-    spinlock_acquire(&SERIALPROC->pipes_spinlock);
-    IpcPipe *inpipe = SERIALPROC->pipes[1];
-    spinlock_release(&SERIALPROC->pipes_spinlock);
-    int32_t read = ipc_piperead(inpipe, (uint8_t *)buf, sizeof(buf));
-    if (read > 0) {
-      for (size_t i = 0; i < sizeof(buf); i++) {
-        serialproc_write(buf[i]);
-      }
-    }
-
-    if (serialproc_received() == 0) {
-      continue;
-    }
-
-    uint8_t inchar = io_in8(SERIAL_PORT);
-    spinlock_acquire(&SERIALPROC->pipes_spinlock);
-    IpcPipe *outpipe = SERIALPROC->pipes[0];
-    spinlock_release(&SERIALPROC->pipes_spinlock);
-    ipc_pipewrite(outpipe, &inchar, sizeof(inchar));
-  }
-}

kernel/proc/serialproc/serialproc.h

@@ -1,11 +0,0 @@
-#ifndef PROC_SERIALPROC_SERIALPROC_H_
-#define PROC_SERIALPROC_SERIALPROC_H_
-
-#include "proc/proc.h"
-
-extern Proc *SERIALPROC;
-
-void serialproc_init(Proc *proc);
-void serialproc_fn(void);
-
-#endif // PROC_SERIALPROC_SERIALPROC_H_

kernel/syscall/processctl.c

@@ -139,7 +139,6 @@ int32_t SYSCALL5(sys_processctl, pid1, cmd1, arg1, arg2, arg3) {
           stat->pid = p->pid;
           hal_strcpy(stat->name, p->name);
           stat->state = p->state;
-          stat->kern = p->kern;
 
           VasRange *vas, *vastmp;
           LL_FOREACH_SAFE(p->vas, vas, vastmp) {

share/sysdefs/processctl.h

@@ -20,7 +20,8 @@ typedef struct {
   char name[0x100];
   uint8_t state;
   size_t usemem;
-  bool kern;
 } ProcStat;
 
+typedef uint64_t PID_t;
+
 #endif // SHARE_HDRS_PROCESSCTL_H_

user/pctl/kill.c

@@ -0,0 +1,28 @@
+#include <stddef.h>
+#include <stdint.h>
+#include <ulib.h>
+#include "kill.h"
+#include "macros.h"
+
+struct {
+  int32_t pid;
+} PCTL_KILL_CONFIG = {
+  .pid = -1,
+};
+
+static Arg ARGS[] = {
+  ARG("-pid", ARG_INT, &PCTL_KILL_CONFIG.pid),
+  ARG_END(),
+};
+
+void pctl_kill(void) {
+  int32_t ret;
+  if ((ret = parse_args(SUBCMD_ARGS(), SUBCMD_ARGSLEN(), ARGS)) < 0) {
+    uprintf("pctl kill: Could not parse args: %d\n", ret);
+    return;
+  }
+
+  if (PCTL_KILL_CONFIG.pid != -1) {
+    processctl(PCTL_KILL_CONFIG.pid, PCTL_KILL, 0, 0, 0);
+  }
+}

user/pctl/kill.h

@@ -0,0 +1,6 @@
+#ifndef PCTL_KILL_H_
+#define PCTL_KILL_H_
+
+void pctl_kill(void);
+
+#endif // PCTL_KILL_H_

user/pctl/ls.c

@@ -64,7 +64,7 @@ void pctl_ls(void) {
   char *namebuf = umalloc(34);
   char *membuf = umalloc(20);
   
-  uprintf("%-30s %s %-6s %-15s %-8s\n", "NAME", "PID", "TYPE", "MEMORY", "STATE");
+  uprintf("%-30s %s %-15s %-8s\n", "NAME", "PID", "MEMORY", "STATE");
   for (size_t i = 0; i < procslen; i++) {
     ProcStat stat; ZERO(&stat);
 
@@ -86,10 +86,9 @@ void pctl_ls(void) {
       namebuf[31] = namebuf[32] = namebuf[33] = '.';
 
       // Too big format string causes a stack overflow. This is an issue with printf ;(
-      uprintf("%-30s %-3lu %-6s %-15s ",
+      uprintf("%-30s %-3lu %-15s ",
               namebuf,
               stat.pid,
-              stat.kern ? "KERNEL" : "USER",
               human_size(stat.usemem, membuf, 20)
             );
       uprintf("%-8s", states[stat.state]);

user/pctl/main.c

@@ -2,6 +2,7 @@
 #include <stdint.h>
 #include <ulib.h>
 #include "ls.h"
+#include "kill.h"
 
 void main(void) {
   if (argslen() == 0) {
@@ -12,6 +13,8 @@ void main(void) {
 
   if (string_strcmp(cmd, "ls") == 0) {
     pctl_ls();
+  } else if (string_strcmp(cmd, "kill") == 0) {
+    pctl_kill();
   } else {
     uprintf("pctl: unknown command %s\n", cmd);
   }

user/tb/interp.c

@@ -5,7 +5,7 @@
 #include "runtime.h"
 #include "macros.h"
 
-extern uint64_t PID;
+extern PID_t PID;
 
 static InterpResult RES;
 

user/tb/main.c

@@ -6,7 +6,7 @@
 
 #define LINEBUF_MAX 1024
 
-uint64_t PID;
+PID_t PID;
 
 struct {
   char *modestr;

user/tb/runtime.c

@@ -4,6 +4,8 @@
 #include "runtime.h"
 #include "interp.h"
 
+extern PID_t PID;
+
 RtCmd *RTCMDS = NULL;
 RtAlias *RTALIASES = NULL;
 
@@ -45,7 +47,13 @@ bool rt_mkalias(Token *tks) {
   return true;
 }
 
+bool rt_PID(Token *tks) {
+  uprintf("%lu\n", PID);
+  return true;
+}
+
 void rt_init(void) {
   RTCMD("%print", &rt_print);
   RTCMD("%mkalias", &rt_mkalias);
+  RTCMD("%PID", &rt_PID);
 }