MFi386: the part of 219452

  - bunch of variables are turned into uint8_t.
  - the setting and reading of "fmt" in load() is removed.
  - buf in printf() is made static to save space.

sys/boot/pc98/boot2/boot2.c

@@ -137,7 +137,7 @@ static const char *kname = NULL;
 static uint32_t opts;
 static int comspeed = SIOSPD;
 static struct bootinfo bootinfo;
-static unsigned ioctrl = IO_KEYBOARD;
+static uint8_t ioctrl = IO_KEYBOARD;
 
 void exit(int);
 static void load(void);
@@ -445,9 +445,8 @@ load(void)
     static Elf32_Shdr es[2];
     caddr_t p;
     ino_t ino;
-    uint32_t addr, x;
+    uint32_t addr;
     int i, j;
-    uint8_t fmt;
 
     if (!(ino = lookup(kname))) {
 	if (!ls)
@@ -456,15 +455,8 @@ load(void)
     }
     if (xfsread(ino, &hdr, sizeof(hdr)))
 	return;
-    if (N_GETMAGIC(hdr.ex) == ZMAGIC)
-	fmt = 0;
-    else if (IS_ELF(hdr.eh))
-	fmt = 1;
-    else {
-	printf("Invalid %s\n", "format");
-	return;
-    }
-    if (fmt == 0) {
+
+    if (N_GETMAGIC(hdr.ex) == ZMAGIC) {
 	addr = hdr.ex.a_entry & 0xffffff;
 	p = PTOV(addr);
 	fs_off = PAGE_SIZE;
@@ -473,7 +465,7 @@ load(void)
 	p += roundup2(hdr.ex.a_text, PAGE_SIZE);
 	if (xfsread(ino, p, hdr.ex.a_data))
 	    return;
-    } else {
+    } else if (IS_ELF(hdr.eh)) {
 	fs_off = hdr.eh.e_phoff;
 	for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) {
 	    if (xfsread(ino, ep + j, sizeof(ep[0])))
@@ -505,7 +497,11 @@ load(void)
 	}
 	addr = hdr.eh.e_entry & 0xffffff;
 	bootinfo.bi_esymtab = VTOP(p);
+    } else {
+	printf("Invalid %s\n", "format");
+	return;
     }
+
     bootinfo.bi_kernelname = VTOP(kname);
     bootinfo.bi_bios_dev = dsk.daua;
     __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
@@ -672,7 +668,7 @@ static void
 printf(const char *fmt,...)
 {
     va_list ap;
-    char buf[10];
+    static char buf[10];
     char *s;
     unsigned u;
     int c;