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88 lines
3.1 KiB
ArmAsm
88 lines
3.1 KiB
ArmAsm
/* Copyright (C) 2011 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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Based on work contributed by David Mosberger (davidm@cs.arizona.edu).
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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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/* Assembly stub to invoke __mcount_internal(). Compiler-generated
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code calls mcount after executing a function's prologue, placing
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the "lr" register in "r10" for the call. As a result "lr" is the
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function that invoked mcount, and "r10" is mcount's caller's
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caller. However, we have to save all the parameter registers here
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before invoking _mcount_internal. Callee-save and temporary
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registers need no special attention. We save r10 and restore it to
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lr on the way out, to properly handle the case of ENTRY() in
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assembly code, before lr is saved. We use the name __mcount since
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the gcc community prefers using the reserved namespace. */
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#include <sysdep.h>
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.text
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ENTRY(__mcount)
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{
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ST sp, lr
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ADDI_PTR r29, sp, - (12 * REGSIZE)
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}
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cfi_offset (lr, 0)
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{
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ADDI_PTR sp, sp, - (13 * REGSIZE)
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ST r29, sp
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ADDI_PTR r29, r29, REGSIZE
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}
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cfi_def_cfa_offset (13 * REGSIZE)
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{ ST r29, r0; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r1; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r2; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r3; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r4; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r5; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r6; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r7; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r8; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r9; ADDI_PTR r29, r29, REGSIZE }
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{ ST r29, r10; ADDI_PTR r29, r29, REGSIZE; move r0, r10 }
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{
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move r1, lr
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jal __mcount_internal
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}
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{
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ADDI_PTR r29, sp, (2 * REGSIZE)
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}
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{ LD r0, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r1, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r2, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r3, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r4, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r5, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r6, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r7, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r8, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r9, r29; ADDI_PTR r29, r29, REGSIZE }
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{ LD r10, r29; ADDI_PTR sp, sp, (13 * REGSIZE) }
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cfi_def_cfa_offset (0)
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{
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LD lr, sp
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}
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{
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move lr, r10
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jrp lr
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}
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END(__mcount)
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#undef mcount
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weak_alias (__mcount, _mcount) /* exported in gmon/Versions */
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weak_alias (__mcount, mcount) /* exported in stdlib/Versions */
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