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52 lines
1.6 KiB
ArmAsm
52 lines
1.6 KiB
ArmAsm
/* Copyright (C) 2001-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <features.h>
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/* When a context set up by __makecontext() is activated, control
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transfers to __start_context. When we get here:
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b1 = entry point of function to call
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in0 = address of UCP to resume after function returns
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in1 = global pointer for __start_context
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out0 .. outN = arguments for function */
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ENTRY(__start_context)
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.prologue
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alloc r2 = ar.pfs, 2, 0, 8, 0
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.save rp, r4 // terminate call chain with a NULL rp
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mov r4 = r0
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;;
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.body
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br.call.sptk rp = b1
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1:
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mov gp = in1 // restore gp
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cmp.ne p6,p0 = in0, r0 // uc_link != 0 ?
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;;
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(p6) mov out0 = in0
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(p6) br.call.sptk rp = __setcontext
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.Lexit:
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mov out0 = 0
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br.call.sptk rp = HIDDEN_JUMPTARGET(exit)
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1: br.cond.sptk .Lexit
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END(__start_context)
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