#
# Copyright (c) 2006 Jakub Jermar
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# - 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.
# - The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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#
#include <abi/asmtool.h>
/*
* IA-64 Software Conventions and Runtime Architecture Guide mandates that
* the zero-extended imm21 operand of the BREAK instruction is used as follows:
*
* MSB | Purpose
* ----+--------
* 000 | Reserved for architected software interrupts
* 001 | Available for application use as software interrupts
* 01x | Reserved for debugger breakpoints
* 1xx | Reserved for definition by each ABI
*/
#define SYSCALL_IMM 0x40000
FUNCTION_BEGIN(__syscall)
alloc r14 = ar.pfs, 7, 0, 0, 0 ;;
break SYSCALL_IMM
mov ar.pfs = r14 ;;
br.ret.sptk.many b0
FUNCTION_END(__syscall)