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freebsd/sys/boot/ia64/skiload/start.S
Marcel Moolenaar c770dc0b63 Fix the ski loader, broken by the gcc upgrade. Update the linker
script to match the one for the EFI loader and rewrite __start()
in assembly to have gp defined without getting in the way of the
compiler.
2003-07-17 01:49:59 +00:00

65 lines
1.7 KiB
ArmAsm

/*
* Copyright (c) 2003 Marcel Moolenaar
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <machine/fpu.h>
#define STACKSIZE 16384
#define FPSR_DEFAULT 0x0009804c0270033f
.text
.global _start
.proc _start
_start:
{ .mlx
mov ar.rsc=0
movl gp=__gp
;;
}
{ .mlx
add r2=@gprel(stack),gp
movl r14=FPSR_DEFAULT
;;
}
{ .mib
mov ar.bspstore=r2
add r12=STACKSIZE-16,r2
bsw.1
;;
}
{ .mmb
mov ar.rsc=3
mov ar.fpsr=r14
br.sptk ski_main
;;
}
.endp _start
.data
.align 16
stack: .skip STACKSIZE