Fix multiboot for ACK-built images

Move the profiling buffer to the end of the data segment

kernel/Makefile

@@ -6,7 +6,7 @@ PROG=	kernel
 # first-stage, arch-dependent startup code
 SRCS=	mpx.S
 SRCS+=	start.c table.c main.c proc.c \
-	system.c clock.c utility.c debug.c profile.c interrupt.c \
+	system.c clock.c utility.c debug.c interrupt.c \
 	watchdog.c cpulocals.c
 
 .ifdef CONFIG_SMP
@@ -38,6 +38,10 @@ MAN=
 
 .include "system/Makefile.inc"
 .include "arch/${ARCH}/Makefile.inc"
+
+# These come last, so the profiling buffer is at the end of the data segment
+SRCS+= profile.c do_sprofile.c
+
 .include <bsd.prog.mk>
 
 debug.d: extracted-errno.h extracted-mfield.h extracted-mtype.h

kernel/profile.c

@@ -28,6 +28,8 @@
 #include <string.h>
 #include "watchdog.h"
 
+char sprof_sample_buffer[SAMPLE_BUFFER_SIZE];
+
 /* Function prototype for the profiling clock handler. */ 
 FORWARD _PROTOTYPE( int profile_clock_handler, (irq_hook_t *hook) );
 

kernel/profile.h

@@ -8,7 +8,7 @@
 #include "arch_watchdog.h"
 
 #define SAMPLE_BUFFER_SIZE	(64 << 20)
-EXTERN char sprof_sample_buffer[SAMPLE_BUFFER_SIZE];
+extern char sprof_sample_buffer[SAMPLE_BUFFER_SIZE];
 
 EXTERN int sprofiling;			/* whether profiling is running */
 EXTERN int sprofiling_type;			/* whether profiling is running */

kernel/system/Makefile.inc

@@ -34,7 +34,6 @@ SRCS+= 	\
 	do_sigreturn.c \
 	do_abort.c \
 	do_getinfo.c \
-	do_sprofile.c \
 	do_cprofile.c \
 	do_profbuf.c \
 	do_vmctl.c \