root/usr/src/lib/libumem/i386/asm_subr.S
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/asm_linkage.h>

#define NOP4    \
        nop;    \
        nop;    \
        nop;    \
        nop;

#define NOP16   \
        NOP4    \
        NOP4    \
        NOP4    \
        NOP4

#define NOP64   \
        NOP16   \
        NOP16   \
        NOP16   \
        NOP16

#define NOP256  \
        NOP64   \
        NOP64   \
        NOP64   \
        NOP64

#if defined(lint)

void *
getfp(void)
{
        return (NULL);
}

#ifndef UMEM_STANDALONE
void
_breakpoint(void)
{
        return;
}
#endif

#else   /* lint */

#if defined(__amd64)

        ENTRY(getfp)
        movq    %rbp, %rax
        ret
        SET_SIZE(getfp)

#else   /* __i386 */

        ENTRY(getfp)
        movl    %ebp, %eax
        ret
        SET_SIZE(getfp)

#endif

#ifndef UMEM_STANDALONE
        ENTRY(_breakpoint)
        int     $3
        ret
        SET_SIZE(_breakpoint)
#endif
        .section ".ptctext", "ax"
        .globl _malloc
        .type _malloc, @function
        .align ASM_ENTRY_ALIGN
_malloc:
        jmp umem_malloc;
        NOP256
        NOP256
#if defined(__amd64)
        NOP64
#endif
        SET_SIZE(_malloc)

        .section ".ptctext","ax"
        .globl _free
        .type _free, @function
        .align ASM_ENTRY_ALIGN
_free:
        jmp umem_malloc_free;
        NOP256
        NOP256
#if defined(__amd64)
        NOP64
#endif
        SET_SIZE(_free)

        ANSI_PRAGMA_WEAK2(malloc,_malloc,function)
        ANSI_PRAGMA_WEAK2(free,_free,function)

#endif  /* lint */