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/* vi: set sw=8 ts=8: */
/* 
 * ldso/ldso/sh64/resolve.S
 * 
 * SuperH (sh64) dynamic resolver support
 *
 * Copyright (C) 2003  Paul Mundt <lethal@linux-sh.org>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. The name of the above contributors may not be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

        .section .text..SHmedia32,"ax"
        .globl  _dl_linux_resolver
        .globl  _dl_linux_resolve
        .type   _dl_linux_resolve, @function

        .balign 16
_dl_linux_resolve:
        addi    r15, -72, r15           ! make room on the stack
        pt      _dl_linux_resolver, tr0
        st.q    r15, 0, r2              ! save regs
        st.q    r15, 8, r3
        st.q    r15, 16, r4
        st.q    r15, 24, r5
        st.q    r15, 32, r6
        st.q    r15, 40, r7
        st.q    r15, 48, r8
        st.q    r15, 56, r9
        st.q    r15, 64, r18

#ifdef HAVE_FPU
        addi    r15, -48, r15           ! make room for FP regs
        fst.d   r15, 0, dr0             ! save FP regs
        fst.d   r15, 8, dr2
        fst.d   r15, 16, dr4
        fst.d   r15, 24, dr6
        fst.d   r15, 32, dr8
        fst.d   r15, 40, dr10
#endif

        /*
         * Args for _dl_linux_resolver(), set in r17/r21 by PLT code
         */

        add     r17, r63, r2            ! link map address
        add     r21, r63, r3            ! GOT offset
        blink   tr0, r18                ! call _dl_linux_resolver()
        ptabs/l r2, tr0                 ! save result = addr of function called
        
#ifdef HAVE_FPU
        fld.d   r15, 0, dr0             ! restore FP regs
        fld.d   r15, 8, dr2
        fld.d   r15, 16, dr4
        fld.d   r15, 24, dr6
        fld.d   r15, 32, dr8
        fld.d   r15, 40, dr10
        addi    r15, 48, r15
#endif

        ld.q    r15, 0, r2              ! restore regs
        ld.q    r15, 8, r3
        ld.q    r15, 16, r4
        ld.q    r15, 24, r5
        ld.q    r15, 32, r6
        ld.q    r15, 40, r7
        ld.q    r15, 48, r8
        ld.q    r15, 56, r9
        ld.q    r15, 64, r18

        addi    r15, 72, r15
        blink   tr0, r63                ! jump to function address

        .size   _dl_linux_resolve, . - _dl_linux_resolve