usr/src/lib/libc/mips/sys/brk.s

/*-
 * Copyright (c) 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ralph Campbell.
 *
 * %sccs.include.redist.c%
 */

#include "SYS.h"

#if defined(LIBC_SCCS) && !defined(lint)
        ASMSTR("@(#)brk.s       8.1 (Berkeley) %G%")
#endif /* LIBC_SCCS and not lint */

#define SYS_brk         17

LEAF(brk)
        lw      v0, minbrk
        bgeu    a0, v0, _brk
        move    a0, v0          # dont allow break < minbrk
ALEAF(_brk)
        li      v0, SYS_brk
        syscall
        bne     a3, zero, 1f
        sw      a0, curbrk
        move    v0, zero
        j       ra
1:
        j       _cerror
END(brk)