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87 lines
2.2 KiB
ArmAsm
87 lines
2.2 KiB
ArmAsm
/* Copyright (C) 1996-2016 Free Software Foundation, Inc.
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Contributed by David Mosberger (davidm@cs.arizona.edu).
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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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/* __bb_init_func is invoked at the beginning of each function, before
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any registers have been saved. It is therefore safe to use any
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caller-saved (call-used) registers (except for argument registers
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a1-a5). */
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#include <sysdep.h>
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/*
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* These offsets should match with "struct bb" declared in gcc/libgcc2.c.
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*/
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#define ZERO_WORD 0x00
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#define NEXT 0x20
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.set noat
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.set noreorder
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ENTRY(__bb_init_func)
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.prologue 0
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ldq t0, ZERO_WORD(a0) /* t0 <- blocks->zero_word */
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beq t0, init /* not initialized yet -> */
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ret
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END(__bb_init_func)
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.ent init
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init:
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.frame sp, 0x38, ra, 0
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subq sp, 0x38, sp
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.prologue 0
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stq pv, 0x30(sp)
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br pv, 1f
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1: ldgp gp, 0(pv)
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ldiq t1, __bb_head
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lda t3, _gmonparam
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ldq t2, 0(t1)
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ldl t3, 0(t3) /* t3 = _gmonparam.state */
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lda t0, 1
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stq t0, ZERO_WORD(a0) /* blocks->zero_word = 1 */
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stq t2, NEXT(a0) /* blocks->next = __bb_head */
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stq a0, 0(t1)
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bne t2, $leave
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beq t3, $leave /* t3 == GMON_PROF_ON? yes -> */
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/* also need to initialize destructor: */
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stq ra, 0x00(sp)
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lda a0, __bb_exit_func
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stq a1, 0x08(sp)
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lda pv, atexit
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stq a2, 0x10(sp)
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stq a3, 0x18(sp)
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stq a4, 0x20(sp)
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stq a5, 0x28(sp)
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jsr ra, (pv), atexit
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ldq ra, 0x00(sp)
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ldq a1, 0x08(sp)
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ldq a2, 0x10(sp)
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ldq a3, 0x18(sp)
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ldq a4, 0x20(sp)
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ldq a5, 0x28(sp)
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$leave: ldq pv, 0x30(sp)
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addq sp, 0x38, sp
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ret
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.end init
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