Build init.

4c1ef7b0 · Silas Boyd-Wickizer · 7bbae2fb · 4c1ef7b0 · 4c1ef7b0 · 4c1ef7b0
--- a/Makefile
+++ b/Makefile
+#
+# XXX compiling user progs with -mcmodel=kernel
+#
+# Custom config file?  Set the default below..
+-include config.mk
+TOOLPREFIX ?= x86_64-jos-elf-
+QEMU ?= qemu-system-x86_64
+CPUS ?= 2
+NM = $(TOOLPREFIX)nm
+CC = $(TOOLPREFIX)gcc
+AS = $(TOOLPREFIX)gas
+LD = $(TOOLPREFIX)ld
+OBJCOPY = $(TOOLPREFIX)objcopy
+OBJDUMP = $(TOOLPREFIX)objdump
+CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -O2 -Wall -MD -ggdb -m64 \
+         -Werror -std=c99 -fms-extensions -mno-sse -mcmodel=kernel
+CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
+ASFLAGS = -m64 -gdwarf-2
+LDFLAGS += -m elf_x86_64
 OBJS = \
 	asm.o \
 	bio.o \
@@ -26,24 +49,10 @@ OBJS = \
 	trap.o \
 	trapasm.o
-# Custom config file?  Set the default below..
+ULIB = ulib.o usys.o printf.o umalloc.o
-include config.mk
-TOOLPREFIX ?= x86_64-jos-elf-
+UPROGS= \
-QEMU ?= qemu-system-x86_64
+	_init \
-CPUS ?= 2
-NM = $(TOOLPREFIX)nm
-CC = $(TOOLPREFIX)gcc
-AS = $(TOOLPREFIX)gas
-LD = $(TOOLPREFIX)ld
-OBJCOPY = $(TOOLPREFIX)objcopy
-OBJDUMP = $(TOOLPREFIX)objdump
-CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -O2 -Wall -MD -ggdb -m64 \
-         -Werror -std=c99 -fms-extensions -mno-sse -mcmodel=kernel
-CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
-ASFLAGS = -m64 -gdwarf-2
-LDFLAGS += -m elf_x86_64
 kernel: boot.o $(OBJS) initcode bootother fs.img
 	$(LD) $(LDFLAGS) -T kernel.ld -z max-page-size=4096 -e start \
@@ -66,6 +75,11 @@ xv6memfs.img: bootblock kernelmemfs
 	dd if=bootblock of=xv6memfs.img conv=notrunc
 	dd if=kernelmemfs of=xv6memfs.img seek=1 conv=notrunc
+_%: %.o $(ULIB)
+	$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $@ $^
+	$(OBJDUMP) -S $@ > $*.asm
+	$(OBJDUMP) -t $@ | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $*.sym
 mkfs: mkfs.c fs.h
 	gcc -m32 -Werror -Wall -o mkfs mkfs.c

--- a/printf.c
+++ b/printf.c
@@ -11,7 +11,7 @@ printint(void (*putch) (void*, char), void *putarg,
  static char digits[] = "0123456789ABCDEF";
  char buf[16];
  int i, neg;
-  uint x;
+  int x;
  neg = 0;
  if(sgn && xx < 0){
@@ -51,9 +51,9 @@ vprintfmt(void (*putch) (void*, char), void *putarg,
      }
    } else if(state == '%'){
      if(c == 'd'){
-        printint(putch, putarg, va_arg(ap, uint), 10, 1);
+        printint(putch, putarg, va_arg(ap, u32), 10, 1);
-      } else if(c == 'x' || c == 'p'){
+      } else if(c == 'x') {
-        printint(putch, putarg, va_arg(ap, uint), 16, 0);
+        printint(putch, putarg, va_arg(ap, u32), 16, 0);
      } else if(c == 's'){
        s = (char*) va_arg(ap, char*);
        if(s == 0)
@@ -63,7 +63,7 @@ vprintfmt(void (*putch) (void*, char), void *putarg,
          s++;
        }
      } else if(c == 'c'){
-        putch(putarg, va_arg(ap, uint));
+        putch(putarg, va_arg(ap, u32));
      } else if(c == '%'){
        putch(putarg, c);
      } else {
@@ -80,7 +80,7 @@ vprintfmt(void (*putch) (void*, char), void *putarg,
 static void
 writec(void *arg, char c)
 {
-  int fd = (int) arg;
+    int fd = (int) (u64) arg;
  write(fd, &c, 1);
 }
@@ -90,7 +90,7 @@ printf(int fd, char *fmt, ...)
  va_list ap;
  va_start(ap, fmt);
-  vprintfmt(writec, (void*) fd, fmt, ap);
+  vprintfmt(writec, (void*) (u64)fd, fmt, ap);
  va_end(ap);
 }
@@ -111,7 +111,7 @@ writebuf(void *arg, char c)
 }
 void
-vsnprintf(char *buf, uint n, char *fmt, va_list ap)
+vsnprintf(char *buf, u32 n, char *fmt, va_list ap)
 {
  struct bufstate bs = { buf, buf+n-1 };
  vprintfmt(writebuf, (void*) &bs, fmt, ap);
@@ -119,7 +119,7 @@ vsnprintf(char *buf, uint n, char *fmt, va_list ap)
 }
 void
-snprintf(char *buf, uint n, char *fmt, ...)
+snprintf(char *buf, u32 n, char *fmt, ...)
 {
  va_list ap;

--- a/ulib.c
+++ b/ulib.c
@@ -30,10 +30,10 @@ strcmp(const char *p, const char *q)
 {
  while(*p && *p == *q)
    p++, q++;
-  return (uchar)*p - (uchar)*q;
+  return (u8)*p - (u8)*q;
 }
-uint
+unsigned int
 strlen(char *s)
 {
  int n;
@@ -44,7 +44,7 @@ strlen(char *s)
 }
 void*
-memset(void *dst, int c, uint n)
+memset(void *dst, int c, unsigned int n)
 {
  stosb(dst, c, n);
  return dst;
@@ -103,7 +103,7 @@ atoi(const char *s)
 }
 void*
-memcpy(void *dst, const void *src, uint n)
+memcpy(void *dst, const void *src, unsigned int n)
 {
  return memmove(dst, (void *)src, n);
 }

--- a/umalloc.c
+++ b/umalloc.c
@@ -11,7 +11,7 @@ typedef long Align;
 union header {
  struct {
    union header *ptr;
-    uint size;
+    u32 size;
  } s;
  Align x;
 };
@@ -44,7 +44,7 @@ free(void *ap)
 }
 static Header*
-morecore(uint nu)
+morecore(u32 nu)
 {
  char *p;
  Header *hp;
@@ -61,10 +61,10 @@ morecore(uint nu)
 }
 void*
-malloc(uint nbytes)
+malloc(u32 nbytes)
 {
  Header *p, *prevp;
-  uint nunits;
+  u32 nunits;
  nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
  if((prevp = freep) == 0){

--- a/user.h
+++ b/user.h
@@ -33,11 +33,11 @@ void *memmove(void*, void*, int);
 char* strchr(const char*, char c);
 int strcmp(const char*, const char*);
 void printf(int, char*, ...);
-void snprintf(char *buf, uint n, char *fmt, ...);
+void snprintf(char *buf, unsigned int n, char *fmt, ...);
 char* gets(char*, int max);
-uint strlen(char*);
+unsigned int strlen(char*);
-void* memset(void*, int, uint);
+void* memset(void*, int, unsigned int);
-void* malloc(uint);
+void* malloc(unsigned int);
 void free(void*);
 int atoi(const char*);