h8300: gcc-8.1 fix

Since gcc 8.1 does not generate an assignment statement to er 0,
we had to explicitly write it.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>

diff --git a/arch/h8300/kernel/sim-console.c b/arch/h8300/kernel/sim-console.c
index 46138f5..03aa35b 100644 (file)
--- a/arch/h8300/kernel/sim-console.c
+++ b/arch/h8300/kernel/sim-console.c
@@ -13,12 +13,13 @@
 
 static void sim_write(struct console *con, const char *s, unsigned n)
 {
-       register const int fd __asm__("er0") = 1; /* stdout */
        register const char *_ptr __asm__("er1") = s;
        register const unsigned _len __asm__("er2") = n;
 
-       __asm__(".byte 0x5e,0x00,0x00,0xc7\n\t" /* jsr @0xc7 (sys_write) */
-               : : "g"(fd), "g"(_ptr), "g"(_len));
+       __asm__("sub.l er0,er0\n\t"             /* er0 = 1 (stdout) */
+               "inc.l #1,er0\n\t"
+               ".byte 0x5e,0x00,0x00,0xc7\n\t" /* jsr @0xc7 (sys_write) */
+               : : "g"(_ptr), "g"(_len):"er0");
 }
 
 static int __init sim_setup(struct earlycon_device *device, const char *opt)