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/* Copyright (C) 1996 Free Software Foundation, Inc.
Contributed by David Mosberger (davidm@cs.arizona.edu).
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/* __bb_init_func is invoked at the beginning of each function, before
any registers have been saved. It is therefore safe to use any
caller-saved (call-used) registers (except for argument registers
a1-a5). */
#include <sysdep.h>
#ifdef __linux__
# include <alpha/regdef.h>
#else
# include <regdef.h>
#endif
/*
* These offsets should match with "struct bb" declared in gcc/libgcc2.c.
*/
#define ZERO_WORD 0x00
#define NEXT 0x20
.set noat
.set noreorder
ENTRY(__bb_init_func)
ldq t0, ZERO_WORD(a0) /* t0 <- blocks->zero_word */
beq t0, init /* not initialized yet -> */
ret
init: subq sp, 0x38, sp
stq pv, 0x30(sp)
br pv, 1f
1: ldgp gp, 0(pv)
lda t1, __bb_head
lda t3, _gmonparam
ldq t2, 0(t1)
ldl t3, 0(t3) /* t3 = _gmonparam.state */
ldi t0, 1
stq t0, ZERO_WORD(a0) /* blocks->zero_word = 1 */
stq t2, NEXT(a0) /* blocks->next = __bb_head */
stq a0, 0(t1)
bne t2, leave
beq t3, leave /* t3 == GMON_PROF_ON? yes -> */
/* also need to initialize destructor: */
stq ra, 0x00(sp)
lda a0, __bb_exit_func
stq a1, 0x08(sp)
lda pv, atexit
stq a2, 0x10(sp)
stq a3, 0x18(sp)
stq a4, 0x20(sp)
stq a5, 0x28(sp)
jsr ra, (pv), atexit
ldq ra, 0x00(sp)
ldq a1, 0x08(sp)
ldq a2, 0x10(sp)
ldq a3, 0x18(sp)
ldq a4, 0x20(sp)
ldq a5, 0x28(sp)
leave: ldq pv, 0x30(sp)
addq sp, 0x38, sp
ret
.end __bb_init_func
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