- Introduce some macros for field names, so that endpt, pendpt,

addr and taddr don't have to be defined any more, so that <sys/mman.h>
    can be included for proper prototypes of munmap() and friends.
  - rename our GETPID to MINIX_GETPID to avoid a name conflict with
    other sources
  - PM needs its own munmap() and munmap_text() to avoid sending messages
    to VM at the startup phase. It *does* want to do that, but only
    after initialising. So they're called again with unmap_ok set to 1
    later.
  - getnuid(), getngid() implementation

servers/pm/break.c

@@ -13,8 +13,8 @@ PUBLIC int do_brk()
 {
   int r;
 /* Entry point to brk(addr) system call.  */
-  r = vm_brk(mp->mp_endpoint, m_in.addr);
-  mp->mp_reply.reply_ptr = (r == OK ? m_in.addr : (char *) -1);
+  r = vm_brk(mp->mp_endpoint, m_in.PMBRK_ADDR);
+  mp->mp_reply.reply_ptr = (r == OK ? m_in.PMBRK_ADDR : (char *) -1);
   return r;
 }
 

servers/pm/exec.c

@@ -113,6 +113,8 @@ PUBLIC int exec_newmem()
 		mp->mp_reply.reply_res3= flags;
 		if (allow_setuid)
 			mp->mp_reply.reply_res3 |= EXC_NM_RF_ALLOW_SETUID;
+	} else {
+		printf("PM: newmem failed for %s\n", args.progname);
 	}
 	return r;
 }

servers/pm/forkexit.c

@@ -248,6 +248,7 @@ int dump_core;			/* flag indicating whether to dump core */
   if((r=vm_willexit(proc_nr_e)) != OK) {
 	panic(__FILE__, "exit_proc: vm_willexit failed", r);
   }
+  vm_notify_sig_wrapper(rmp->mp_endpoint);
 
   if (proc_nr_e == INIT_PROC_NR)
   {
@@ -276,8 +277,7 @@ int dump_core;			/* flag indicating whether to dump core */
   }
   else
   {
-	printf("PM: FS died\n");
-	return;
+	panic(__FILE__, "pm_exit: FS died", r);
   }
 
   /* The process is now officially exiting. The ZOMBIE flag is not enough, as

servers/pm/getset.c

@@ -7,6 +7,7 @@
 #include "pm.h"
 #include <minix/callnr.h>
 #include <minix/endpoint.h>
+#include <minix/com.h>
 #include <signal.h>
 #include "mproc.h"
 #include "param.h"
@@ -29,17 +30,21 @@ PUBLIC int do_getset()
 	case GETUID:
 		r = rmp->mp_realuid;
 		rmp->mp_reply.reply_res2 = rmp->mp_effuid;
+		if (pm_isokendpt(m_in.PM_ENDPT, &proc) == OK && proc >= 0)
+			rmp->mp_reply.reply_res3 = mproc[proc].mp_effuid;
 		break;
 
 	case GETGID:
 		r = rmp->mp_realgid;
 		rmp->mp_reply.reply_res2 = rmp->mp_effgid;
+		if (pm_isokendpt(m_in.PM_ENDPT, &proc) == OK && proc >= 0)
+			rmp->mp_reply.reply_res3 = mproc[proc].mp_effgid;
 		break;
 
-	case GETPID:
+	case MINIX_GETPID:
 		r = mproc[who_p].mp_pid;
 		rmp->mp_reply.reply_res2 = mproc[rmp->mp_parent].mp_pid;
-		if(pm_isokendpt(m_in.endpt, &proc) == OK && proc >= 0)
+		if(pm_isokendpt(m_in.PM_ENDPT, &proc) == OK && proc >= 0)
 			rmp->mp_reply.reply_res3 = mproc[proc].mp_pid;
 		break;
 

servers/pm/main.c

@@ -19,6 +19,7 @@
 #include <minix/minlib.h>
 #include <minix/type.h>
 #include <minix/vm.h>
+#include <minix/crtso.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <fcntl.h>
@@ -208,6 +209,8 @@ int result;			/* result of call (usually OK or error #) */
   rmp->mp_flags |= REPLY;	/* reply pending */
 }
 
+extern int unmap_ok;
+
 /*===========================================================================*
  *				pm_init					     *
  *===========================================================================*/
@@ -340,6 +343,17 @@ PRIVATE void pm_init()
  if(f > 0) printf("PM: failed to register %d processes with DS.\n", f);
 
  system_hz = sys_hz();
+
+ /* Map out our own text and data. This is normally done in crtso.o
+  * but PM is an exception - we don't get to talk to VM so early on.
+  * That's why we override munmap() and munmap_text() in utility.c.
+  *
+  * _minix_unmapzero() is the same code in crtso.o that normally does
+  * it on startup. It's best that it's there as crtso.o knows exactly
+  * what the ranges are of the filler data.
+  */
+  unmap_ok = 1;
+  _minix_unmapzero();
 }
 
 /*===========================================================================*

servers/pm/misc.c

@@ -325,7 +325,7 @@ PUBLIC int do_getprocnr()
   if (m_in.pid >= 0) {			/* lookup process by pid */
   	for (rmp = &mproc[0]; rmp < &mproc[NR_PROCS]; rmp++) {
 		if ((rmp->mp_flags & IN_USE) && (rmp->mp_pid==m_in.pid)) {
-  			mp->mp_reply.endpt = rmp->mp_endpoint;
+  			mp->mp_reply.PM_ENDPT = rmp->mp_endpoint;
 #if 0
   			printf("PM: pid result: %d\n", rmp->mp_endpoint);
 #endif
@@ -335,27 +335,24 @@ PUBLIC int do_getprocnr()
   	return(ESRCH);			
   } else if (m_in.namelen > 0) {	/* lookup process by name */
   	key_len = MIN(m_in.namelen, PROC_NAME_LEN);
- 	if (OK != (s=sys_datacopy(who_e, (vir_bytes) m_in.addr, 
+ 	if (OK != (s=sys_datacopy(who_e, (vir_bytes) m_in.PMBRK_ADDR, 
  			SELF, (vir_bytes) search_key, key_len))) 
  		return(s);
  	search_key[key_len] = '\0';	/* terminate for safety */
   	for (rmp = &mproc[0]; rmp < &mproc[NR_PROCS]; rmp++) {
 		if (((rmp->mp_flags & (IN_USE | EXITING)) == IN_USE) && 
 			strncmp(rmp->mp_name, search_key, key_len)==0) {
-  			mp->mp_reply.endpt = rmp->mp_endpoint;
-  			printf("PM: name %s result: %d\n", search_key, 
-					rmp->mp_endpoint);
+  			mp->mp_reply.PM_ENDPT = rmp->mp_endpoint;
   			return(OK);
 		} 
 	}
-	printf("PM: name %s result: ESRCH\n", search_key);
   	return(ESRCH);			
   } else {			/* return own/parent process number */
 #if 0
-	printf("PM: endpt result: %d\n", mp->mp_reply.endpt);
+	printf("PM: endpt result: %d\n", mp->mp_reply.PM_ENDPT);
 #endif
-  	mp->mp_reply.endpt = who_e;
-	mp->mp_reply.pendpt = mproc[mp->mp_parent].mp_endpoint;
+  	mp->mp_reply.PM_ENDPT = who_e;
+	mp->mp_reply.PM_PENDPT = mproc[mp->mp_parent].mp_endpoint;
   }
 
   return(OK);
@@ -378,7 +375,7 @@ PUBLIC int do_getpuid()
 	return EPERM;
   }
 
-  ep= m_in.endpt;
+  ep= m_in.PM_ENDPT;
 
   for (rmp = &mproc[0]; rmp < &mproc[NR_PROCS]; rmp++) {
 	if ((rmp->mp_flags & IN_USE) && (rmp->mp_endpoint == ep)) {

servers/pm/param.h

@@ -1,13 +1,10 @@
 /* The following names are synonyms for the variables in the input message. */
-#define addr            m1_p1
 #define exec_name	m1_p1
 #define exec_len	m1_i1
 #define func		m6_f1
 #define grp_id		m1_i1
 #define namelen		m1_i2
 #define pid		m1_i1
-#define endpt		m1_i1
-#define pendpt		m1_i2
 #define seconds		m1_i1
 #define which_timer	m1_i1
 #define new_val		m1_p1
@@ -18,7 +15,6 @@
 #define status		m1_i1
 #define usr_id		m1_i1
 #define request		m2_i2
-#define taddr		m2_l1
 #define data		m2_l2
 #define sig_nr		m1_i2
 #define sig_nsa		m1_p1

servers/pm/signal.c

@@ -306,6 +306,28 @@ PUBLIC int do_pause()
   return(SUSPEND);
 }
 
+PRIVATE vm_notify_sig_wrapper(endpoint_t ep)
+{
+	/* get IPC's endpoint,
+	 * the reason that we directly get the endpoint
+	 * instead of from DS server is that otherwise
+	 * it will cause deadlock between PM, VM and DS.
+	 */
+	struct mproc *rmp;
+	endpoint_t ipc_ep = 0;
+
+	for (rmp = &mproc[0]; rmp < &mproc[NR_PROCS]; rmp++) {
+		if (!(rmp->mp_flags & IN_USE))
+			continue;
+		if (!strcmp(rmp->mp_name, "ipc")) {
+			ipc_ep = rmp->mp_endpoint;
+			vm_notify_sig(ep, ipc_ep);
+
+			return;
+		}
+	}
+}
+
 /*===========================================================================*
  *				sig_proc				     *
  *===========================================================================*/
@@ -411,6 +433,7 @@ int signo;			/* signal to send to process (1 to _NSIG) */
 	 * ready.
 	 */
 	unpause(slot, FALSE /*!for_trace*/);
+	vm_notify_sig_wrapper(rmp->mp_endpoint);
 	return;
   }
   else if (sigismember(&rmp->mp_sig2mess, signo)) {

servers/pm/trace.c

@@ -55,7 +55,7 @@ PUBLIC int do_trace()
 	if ((child=find_proc(m_in.pid))==NIL_MPROC)
 		return(ESRCH);
 
-	r= sys_trace(m_in.request,child->mp_endpoint,m_in.taddr,&m_in.data);
+	r= sys_trace(m_in.request,child->mp_endpoint,m_in.PMTRACE_ADDR,&m_in.data);
 	if (r != OK) return(r);
 
 	mp->mp_reply.reply_trace = m_in.data;
@@ -80,7 +80,7 @@ PUBLIC int do_trace()
 	child->mp_ctime= 0;
 #endif
 
-	r= sys_trace(m_in.request,child->mp_endpoint,m_in.taddr,&m_in.data);
+	r= sys_trace(m_in.request,child->mp_endpoint,m_in.PMTRACE_ADDR,&m_in.data);
 	if (r != OK) return(r);
 
 	mp->mp_reply.reply_trace = m_in.data;
@@ -135,7 +135,7 @@ PUBLIC int do_trace()
 	child->mp_flags &= ~STOPPED;
   	break;
   }
-  r= sys_trace(m_in.request,child->mp_endpoint,m_in.taddr,&m_in.data);
+  r= sys_trace(m_in.request,child->mp_endpoint,m_in.PMTRACE_ADDR,&m_in.data);
   if (r != OK) return(r);
 
   mp->mp_reply.reply_trace = m_in.data;

servers/pm/utility.c

@@ -28,6 +28,12 @@
 #include "../../kernel/type.h"
 #include "../../kernel/proc.h"
 
+#define munmap _munmap
+#define munmap_text _munmap_text
+#include <sys/mman.h>
+#undef munmap
+#undef munmap_text
+
 /*===========================================================================*
  *				get_free_pid				     *
  *===========================================================================*/
@@ -111,3 +117,21 @@ PUBLIC int pm_isokendpt(int endpoint, int *proc)
 	return OK;
 }
 
+int unmap_ok = 0;
+
+PUBLIC int munmap(void *addrstart, vir_bytes len)
+{
+	if(!unmap_ok) 
+		return ENOSYS;
+
+	return _munmap(addrstart, len);
+}
+
+PUBLIC int munmap_text(void *addrstart, vir_bytes len)
+{
+	if(!unmap_ok)
+		return ENOSYS;
+
+	return _munmap_text(addrstart, len);
+
+}