panic() cleanup.

this change
   - makes panic() variadic, doing full printf() formatting -
     no more NO_NUM, and no more separate printf() statements
     needed to print extra info (or something in hex) before panicing
   - unifies panic() - same panic() name and usage for everyone -
     vm, kernel and rest have different names/syntax currently
     in order to implement their own luxuries, but no longer
   - throws out the 1st argument, to make source less noisy.
     the panic() in syslib retrieves the server name from the kernel
     so it should be clear enough who is panicing; e.g.
         panic("sigaction failed: %d", errno);
     looks like:
         at_wini(73130): panic: sigaction failed: 0
         syslib:panic.c: stacktrace: 0x74dc 0x2025 0x100a
   - throws out report() - printf() is more convenient and powerful
   - harmonizes/fixes the use of panic() - there were a few places
     that used printf-style formatting (didn't work) and newlines
     (messes up the formatting) in panic()
   - throws out a few per-server panic() functions
   - cleans up a tie-in of tty with panic()

merging printf() and panic() statements to be done incrementally.

include/minix/const.h

@@ -60,7 +60,6 @@
 #define BYTE            0377	/* mask for 8 bits */
 #define READING            0	/* copy data to user */
 #define WRITING            1	/* copy data from user */
-#define NO_NUM        0x8000	/* used as numerical argument to panic() */
 #define NIL_PTR   (char *) 0	/* generally useful expression */
 #define HAVE_SCATTERED_IO  1	/* scattered I/O is now standard */
 

include/minix/devio.h

@@ -32,7 +32,7 @@ typedef struct { u16_t port; u32_t value; } pvl_pair_t;
 		printf("%s:%d: actual port: 0x%x != 0x%lx || "	\
 			"actual value: 0x%x != 0x%lx\n",	\
 			__FILE__, __LINE__, (pv).port, _p, (pv).value, _v); \
-		panic(__FILE__, "pv_set(" #pv ", " #p ", " #v ")", NO_NUM); \
+		panic("pv_set(" #pv ", " #p ", " #v ")"); \
 	}							\
 } while(0)
 

include/minix/sysutil.h

@@ -44,8 +44,7 @@ _PROTOTYPE( int fkey_ctl, (int req, int *fkeys, int *sfkeys)		);
 
 _PROTOTYPE( int printf, (const char *fmt, ...));
 _PROTOTYPE( void kputc, (int c));
-_PROTOTYPE( void report, (char *who, char *mess, int num));
-_PROTOTYPE( void panic, (char *who, char *mess, int num));
+_PROTOTYPE( void panic, (const char *fmt, ...));
 _PROTOTYPE( int getuptime, (clock_t *ticks));
 _PROTOTYPE( int getuptime2, (clock_t *ticks, time_t *boottime));
 _PROTOTYPE( int tickdelay, (clock_t ticks));
@@ -65,7 +64,7 @@ _PROTOTYPE( void get_randomness, (struct k_randomness *, int));
 #define asynsend(ep, msg) asynsend3(ep, msg, 0)
 _PROTOTYPE( int asynsend3, (endpoint_t ep, message *msg, int flags));
 
-#define ASSERT(c) if(!(c)) { panic(__FILE__, "assert " #c " failed at line", __LINE__); }
+#define ASSERT(c) if(!(c)) { panic("%s:%d: assert %s failed", __FILE__, __LINE__, #c); }
 
 /* timing library */
 #define TIMING_CATEGORIES       20

include/minix/type.h

@@ -167,7 +167,7 @@ struct memory {
 #define STATICINIT(v, n) \
 	if(!(v)) {	\
 		if(!((v) = alloc_contig(sizeof(*(v)) * (n), 0, NULL))) { \
-			panic(__FILE__, "allocating " #v " failed", n);	\
+			panic("allocating " #v " failed: %d", n);	\
 		}	\
 	}