Implement /proc/slabinfo

Add a node 'slabinfo' to the root directory that contains information
about the slab allocator used in GNU Mach.

The formatting code has been taken from Richard Braun's standalone
client available here:

git://darnassus.sceen.net/rbraun/slabinfo.git

* rootdir.c (rootdir_gc_slabinfo): New function.
(rootdir_entries): Add node 'slabinfo'.
* Makefile (OBJS): Add mach_debugUser.o.
(rootdir.o): Add an explicit dependency on mach_debug_U.h.
Furthermore, add rules to create both functions.

1 files changed, 21 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 5c51c1d..2820596 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 TARGET = procfs
 OBJS = procfs.o netfs.o procfs_dir.o \
-       process.o proclist.o rootdir.o dircat.o main.o
+       process.o proclist.o rootdir.o dircat.o main.o mach_debugUser.o
 LIBS = -lnetfs -lps -lfshelp -lpthread
 
 CC = gcc
@@ -19,8 +19,28 @@ CPPFLAGS += -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
 
 all: $(TARGET)
 
+rootdir.o: rootdir.c mach_debug_U.h
+
 $(TARGET): $(OBJS)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
 
 clean:
 	$(RM) $(TARGET) $(OBJS)
+
+# This is the gist of the MIG user stub handling from Hurd's build
+# system:
+
+# Where to find .defs files.
+vpath %.defs /usr/include/mach_debug
+
+MIG = mig
+MIGCOM = $(MIG) -cc cat - /dev/null
+MIGCOMFLAGS := -subrprefix __
+
+%.udefsi: %.defs
+	$(CPP) -x c $(CPPFLAGS) $(MIGUFLAGS) $($*-MIGUFLAGS) \
+	  $< -o $*.udefsi
+
+%_U.h %User.c: %.udefsi
+	$(MIGCOM) $(MIGCOMFLAGS) $(MIGCOMUFLAGS) $($*-MIGCOMUFLAGS) < $< \
+		  -user $*User.c -server /dev/null -header $*_U.h