source: trunk/libs/newlib/src/libgloss/arc/gcrt0.S @ 675

/*
   Copyright (c) 2016, Synopsys, Inc. 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) Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

   3) Neither the name of the Synopsys, Inc., nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 COPYRIGHT HOLDER OR 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.
*/
#define PROFILE_SUPPORT 1

#include "crt0.S"

        .global __mcount
        .type   __mcount, @function
        .align 4
__mcount:
        ;; When a function is compiled for profiling, gcc will insert
        ;; a call to __mcount without checking for resources.  Hence,
        ;; we need save all of the argument registers and temp registers,
        ;; extract the address of <func_name>, and call the _mcount_internal
        ;; to do the real work.  Finally, restore all the argument registers
        ;; before returning.
        push_s  blink
        push_s  r0
        push_s  r1
        push_s  r2
        push_s  r3
#ifndef __ARC_RF16__
        push    r4
        push    r5
        push    r6
        push    r7
        push    r8
        push    r9
#endif
        push    r10
        push    r11
        push    r12
        mov     r0,blink
        jl      @_mcount_internal
        pop     r12
        pop     r11
        pop     r10
#ifndef __ARC_RF16__
        pop     r9
        pop     r8
        pop     r7
        pop     r6
        pop     r5
        pop     r4
#endif
        pop_s   r3
        pop_s   r2
        pop_s   r1
        pop_s   r0
        pop_s   blink
        j_s     [blink]
        .size __mcount, . - __mcount