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65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/* Machine-dependent definitions for profiling support. Nios II version.
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Copyright (C) 1996-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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#define _MCOUNT_DECL(frompc, selfpc) \
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static void __attribute_used__ __mcount_internal (u_long frompc, u_long selfpc)
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/* This macro/func MUST save r4, r5, r6, r7 and r8 because the compiler inserts
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blind calls to mcount(), ignoring the fact that mcount may clobber
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registers; therefore, mcount may NOT clobber registers. */
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#if defined(__PIC__) || defined(PIC)
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#define NIOS2_MCOUNT_CALL \
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"nextpc r3\n\t" \
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"1: movhi r2, %hiadj(_gp_got - 1b)\n\t" \
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"addi r2, r2, %lo(_gp_got - 1b)\n\t" \
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"add r2, r2, r3\n\t" \
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"ldw r2, %call(__mcount_internal)(r2)\n\t" \
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"callr r2\n\t"
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#else
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#define NIOS2_MCOUNT_CALL \
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"call\t__mcount_internal\n\t"
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#endif
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#define MCOUNT \
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asm (".globl _mcount\n\t" \
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".type _mcount,@function\n\t" \
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"_mcount:\n\t" \
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"subi sp, sp, 24\n\t" \
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"stw ra, 20(sp)\n\t" \
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"stw r8, 16(sp)\n\t" \
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"stw r7, 12(sp)\n\t" \
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"stw r6, 8(sp)\n\t" \
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"stw r5, 4(sp)\n\t" \
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"stw r4, 0(sp)\n\t" \
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"mov r4, r8\n\t" \
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"mov r5, ra\n\t" \
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NIOS2_MCOUNT_CALL \
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"ldw ra, 20(sp)\n\t" \
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"ldw r8, 16(sp)\n\t" \
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"ldw r7, 12(sp)\n\t" \
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"ldw r6, 8(sp)\n\t" \
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"ldw r5, 4(sp)\n\t" \
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"ldw r4, 0(sp)\n\t" \
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"addi sp, sp, 24\n\t" \
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"ret\n\t" \
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".size _mcount, . - _mcount\n\t" \
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);
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