Commit f278d5cb authored by Rabin Vincent's avatar Rabin Vincent Committed by Edgar E. Iglesias
Browse files

tests: cris: fix syscall inline asm 



Add the appropriate register constraints for the inline asm for the
write and exit system calls.  Without the correct constraints for the
write() function, correct failure messages are not printed succesfully
on newer version of GCC.

Reviewed-by: default avatarEdgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarRabin Vincent <rabinv@axis.com>
Signed-off-by: default avatarEdgar E. Iglesias <edgar.iglesias@xilinx.com>
parent 21ce148c

tests/tcg/cris/sys.c

+17 −9
Original line number Diff line number Diff line
@@ -33,19 +33,27 @@ void *memset (void *s, int c, size_t n) { 
}



void exit (int status) {

	asm volatile ("moveq 1, $r9\n" /* NR_exit.  */

		      "break 13\n");

	register unsigned int callno asm ("r9") = 1; /* NR_exit */



	asm volatile ("break 13\n"

		      :

		      : "r" (callno)

		      : "memory" );

	while(1)

		;

}



ssize_t write (int fd, const void *buf, size_t count) {

	int r;

	asm ("move.d %0, $r10\n"

	     "move.d %1, $r11\n"

	     "move.d %2, $r12\n"

	     "moveq 4, $r9\n" /* NR_write.  */

	     "break 13\n" : : "r" (fd), "r" (buf), "r" (count) : "memory");

	asm ("move.d $r10, %0\n" : "=r" (r));

	register unsigned int callno asm ("r9") = 4; /* NR_write */

	register unsigned int r10 asm ("r10") = fd;

	register const void *r11 asm ("r11") = buf;

	register size_t r12 asm ("r12") = count;

	register unsigned int r asm ("r10");



	asm volatile ("break 13\n"

	     : "=r" (r)

	     : "r" (callno), "0" (r10), "r" (r11), "r" (r12)

	     : "memory");



	return r;

}