1 /* More subroutines needed by GCC output code on some machines. */
2 /* Compile this one with gcc. */
3 /* Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 In addition to the permissions in the GNU General Public License, the
14 Free Software Foundation gives you unlimited permission to link the
15 compiled version of this file into combinations with other programs,
16 and to distribute those combinations without any restriction coming
17 from the use of this file. (The General Public License restrictions
18 do apply in other respects; for example, they cover modification of
19 the file, and distribution when not linked into a combine
22 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
23 WARRANTY; without even the implied warranty of MERCHANTABILITY or
24 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
27 You should have received a copy of the GNU General Public License
28 along with GCC; see the file COPYING. If not, write to the Free
29 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
32 /* It is incorrect to include config.h here, because this file is being
33 compiled for the target, and hence definitions concerning only the host
41 /* Don't use `fancy_abort' here even if config.h says to use it. */
48 #if defined (L_negdi2) || defined (L_divdi3) || defined (L_moddi3)
49 #if defined (L_divdi3) || defined (L_moddi3)
61 w
.s
.high
= -uu
.s
.high
- ((UWtype
) w
.s
.low
> 0);
69 __addvsi3 (Wtype a
, Wtype b
)
75 if (b
>= 0 ? w
< a
: w
> a
)
84 __addvdi3 (DWtype a
, DWtype b
)
90 if (b
>= 0 ? w
< a
: w
> a
)
99 __subvsi3 (Wtype a
, Wtype b
)
102 return __addvsi3 (a
, (-b
));
108 if (b
>= 0 ? w
> a
: w
< a
)
118 __subvdi3 (DWtype a
, DWtype b
)
127 if (b
>= 0 ? w
> a
: w
< a
)
137 __mulvsi3 (Wtype a
, Wtype b
)
143 if (((a
>= 0) == (b
>= 0)) ? w
< 0 : w
> 0)
158 if (a
>= 0 ? w
> 0 : w
< 0)
173 if (a
>= 0 ? w
> 0 : w
< 0)
222 __mulvdi3 (DWtype u
, DWtype v
)
228 if (((u
>= 0) == (v
>= 0)) ? w
< 0 : w
> 0)
236 /* Unless shift functions are defined whith full ANSI prototypes,
237 parameter b will be promoted to int if word_type is smaller than an int. */
240 __lshrdi3 (DWtype u
, word_type b
)
251 bm
= (sizeof (Wtype
) * BITS_PER_UNIT
) - b
;
255 w
.s
.low
= (UWtype
) uu
.s
.high
>> -bm
;
259 UWtype carries
= (UWtype
) uu
.s
.high
<< bm
;
261 w
.s
.high
= (UWtype
) uu
.s
.high
>> b
;
262 w
.s
.low
= ((UWtype
) uu
.s
.low
>> b
) | carries
;
271 __ashldi3 (DWtype u
, word_type b
)
282 bm
= (sizeof (Wtype
) * BITS_PER_UNIT
) - b
;
286 w
.s
.high
= (UWtype
) uu
.s
.low
<< -bm
;
290 UWtype carries
= (UWtype
) uu
.s
.low
>> bm
;
292 w
.s
.low
= (UWtype
) uu
.s
.low
<< b
;
293 w
.s
.high
= ((UWtype
) uu
.s
.high
<< b
) | carries
;
302 __ashrdi3 (DWtype u
, word_type b
)
313 bm
= (sizeof (Wtype
) * BITS_PER_UNIT
) - b
;
316 /* w.s.high = 1..1 or 0..0 */
317 w
.s
.high
= uu
.s
.high
>> (sizeof (Wtype
) * BITS_PER_UNIT
- 1);
318 w
.s
.low
= uu
.s
.high
>> -bm
;
322 UWtype carries
= (UWtype
) uu
.s
.high
<< bm
;
324 w
.s
.high
= uu
.s
.high
>> b
;
325 w
.s
.low
= ((UWtype
) uu
.s
.low
>> b
) | carries
;
337 UWtype word
, count
, add
;
341 word
= uu
.s
.low
, add
= 0;
342 else if (uu
.s
.high
!= 0)
343 word
= uu
.s
.high
, add
= BITS_PER_UNIT
* sizeof (Wtype
);
347 count_trailing_zeros (count
, word
);
348 return count
+ add
+ 1;
354 __muldi3 (DWtype u
, DWtype v
)
362 w
.ll
= __umulsidi3 (uu
.s
.low
, vv
.s
.low
);
363 w
.s
.high
+= ((UWtype
) uu
.s
.low
* (UWtype
) vv
.s
.high
364 + (UWtype
) uu
.s
.high
* (UWtype
) vv
.s
.low
);
371 #if defined (sdiv_qrnnd)
373 __udiv_w_sdiv (UWtype
*rp
, UWtype a1
, UWtype a0
, UWtype d
)
380 if (a1
< d
- a1
- (a0
>> (W_TYPE_SIZE
- 1)))
382 /* dividend, divisor, and quotient are nonnegative */
383 sdiv_qrnnd (q
, r
, a1
, a0
, d
);
387 /* Compute c1*2^32 + c0 = a1*2^32 + a0 - 2^31*d */
388 sub_ddmmss (c1
, c0
, a1
, a0
, d
>> 1, d
<< (W_TYPE_SIZE
- 1));
389 /* Divide (c1*2^32 + c0) by d */
390 sdiv_qrnnd (q
, r
, c1
, c0
, d
);
391 /* Add 2^31 to quotient */
392 q
+= (UWtype
) 1 << (W_TYPE_SIZE
- 1);
397 b1
= d
>> 1; /* d/2, between 2^30 and 2^31 - 1 */
398 c1
= a1
>> 1; /* A/2 */
399 c0
= (a1
<< (W_TYPE_SIZE
- 1)) + (a0
>> 1);
401 if (a1
< b1
) /* A < 2^32*b1, so A/2 < 2^31*b1 */
403 sdiv_qrnnd (q
, r
, c1
, c0
, b1
); /* (A/2) / (d/2) */
405 r
= 2*r
+ (a0
& 1); /* Remainder from A/(2*b1) */
422 else if (c1
< b1
) /* So 2^31 <= (A/2)/b1 < 2^32 */
425 c0
= ~c0
; /* logical NOT */
427 sdiv_qrnnd (q
, r
, c1
, c0
, b1
); /* (A/2) / (d/2) */
429 q
= ~q
; /* (A/2)/b1 */
432 r
= 2*r
+ (a0
& 1); /* A/(2*b1) */
450 else /* Implies c1 = b1 */
451 { /* Hence a1 = d - 1 = 2*b1 - 1 */
469 /* If sdiv_qrnnd doesn't exist, define dummy __udiv_w_sdiv. */
471 __udiv_w_sdiv (UWtype
*rp
__attribute__ ((__unused__
)),
472 UWtype a1
__attribute__ ((__unused__
)),
473 UWtype a0
__attribute__ ((__unused__
)),
474 UWtype d
__attribute__ ((__unused__
)))
481 #if (defined (L_udivdi3) || defined (L_divdi3) || \
482 defined (L_umoddi3) || defined (L_moddi3))
487 const UQItype __clz_tab
[] =
489 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
490 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
491 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
492 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
493 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
494 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
495 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
496 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
502 #if (defined (L_udivdi3) || defined (L_divdi3) || \
503 defined (L_umoddi3) || defined (L_moddi3))
507 __udivmoddi4 (UDWtype n
, UDWtype d
, UDWtype
*rp
)
512 UWtype d0
, d1
, n0
, n1
, n2
;
524 #if !UDIV_NEEDS_NORMALIZATION
531 udiv_qrnnd (q0
, n0
, n1
, n0
, d0
);
534 /* Remainder in n0. */
541 d0
= 1 / d0
; /* Divide intentionally by zero. */
543 udiv_qrnnd (q1
, n1
, 0, n1
, d0
);
544 udiv_qrnnd (q0
, n0
, n1
, n0
, d0
);
546 /* Remainder in n0. */
557 #else /* UDIV_NEEDS_NORMALIZATION */
565 count_leading_zeros (bm
, d0
);
569 /* Normalize, i.e. make the most significant bit of the
573 n1
= (n1
<< bm
) | (n0
>> (W_TYPE_SIZE
- bm
));
577 udiv_qrnnd (q0
, n0
, n1
, n0
, d0
);
580 /* Remainder in n0 >> bm. */
587 d0
= 1 / d0
; /* Divide intentionally by zero. */
589 count_leading_zeros (bm
, d0
);
593 /* From (n1 >= d0) /\ (the most significant bit of d0 is set),
594 conclude (the most significant bit of n1 is set) /\ (the
595 leading quotient digit q1 = 1).
597 This special case is necessary, not an optimization.
598 (Shifts counts of W_TYPE_SIZE are undefined.) */
607 b
= W_TYPE_SIZE
- bm
;
611 n1
= (n1
<< bm
) | (n0
>> b
);
614 udiv_qrnnd (q1
, n1
, n2
, n1
, d0
);
619 udiv_qrnnd (q0
, n0
, n1
, n0
, d0
);
621 /* Remainder in n0 >> bm. */
631 #endif /* UDIV_NEEDS_NORMALIZATION */
642 /* Remainder in n1n0. */
654 count_leading_zeros (bm
, d1
);
657 /* From (n1 >= d1) /\ (the most significant bit of d1 is set),
658 conclude (the most significant bit of n1 is set) /\ (the
659 quotient digit q0 = 0 or 1).
661 This special case is necessary, not an optimization. */
663 /* The condition on the next line takes advantage of that
664 n1 >= d1 (true due to program flow). */
665 if (n1
> d1
|| n0
>= d0
)
668 sub_ddmmss (n1
, n0
, n1
, n0
, d1
, d0
);
687 b
= W_TYPE_SIZE
- bm
;
689 d1
= (d1
<< bm
) | (d0
>> b
);
692 n1
= (n1
<< bm
) | (n0
>> b
);
695 udiv_qrnnd (q0
, n1
, n2
, n1
, d1
);
696 umul_ppmm (m1
, m0
, q0
, d0
);
698 if (m1
> n1
|| (m1
== n1
&& m0
> n0
))
701 sub_ddmmss (m1
, m0
, m1
, m0
, d1
, d0
);
706 /* Remainder in (n1n0 - m1m0) >> bm. */
709 sub_ddmmss (n1
, n0
, n1
, n0
, m1
, m0
);
710 rr
.s
.low
= (n1
<< b
) | (n0
>> bm
);
711 rr
.s
.high
= n1
>> bm
;
726 __divdi3 (DWtype u
, DWtype v
)
737 uu
.ll
= __negdi2 (uu
.ll
);
740 vv
.ll
= __negdi2 (vv
.ll
);
742 w
= __udivmoddi4 (uu
.ll
, vv
.ll
, (UDWtype
*) 0);
752 __moddi3 (DWtype u
, DWtype v
)
763 uu
.ll
= __negdi2 (uu
.ll
);
765 vv
.ll
= __negdi2 (vv
.ll
);
767 (void) __udivmoddi4 (uu
.ll
, vv
.ll
, &w
);
777 __umoddi3 (UDWtype u
, UDWtype v
)
781 (void) __udivmoddi4 (u
, v
, &w
);
789 __udivdi3 (UDWtype n
, UDWtype d
)
791 return __udivmoddi4 (n
, d
, (UDWtype
*) 0);
797 __cmpdi2 (DWtype a
, DWtype b
)
801 au
.ll
= a
, bu
.ll
= b
;
803 if (au
.s
.high
< bu
.s
.high
)
805 else if (au
.s
.high
> bu
.s
.high
)
807 if ((UWtype
) au
.s
.low
< (UWtype
) bu
.s
.low
)
809 else if ((UWtype
) au
.s
.low
> (UWtype
) bu
.s
.low
)
817 __ucmpdi2 (DWtype a
, DWtype b
)
821 au
.ll
= a
, bu
.ll
= b
;
823 if ((UWtype
) au
.s
.high
< (UWtype
) bu
.s
.high
)
825 else if ((UWtype
) au
.s
.high
> (UWtype
) bu
.s
.high
)
827 if ((UWtype
) au
.s
.low
< (UWtype
) bu
.s
.low
)
829 else if ((UWtype
) au
.s
.low
> (UWtype
) bu
.s
.low
)
835 #if defined(L_fixunstfdi) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
836 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
837 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
840 __fixunstfDI (TFtype a
)
848 /* Compute high word of result, as a flonum. */
849 b
= (a
/ HIGH_WORD_COEFF
);
850 /* Convert that to fixed (but not to DWtype!),
851 and shift it into the high word. */
854 /* Remove high part from the TFtype, leaving the low part as flonum. */
856 /* Convert that to fixed (but not to DWtype!) and add it in.
857 Sometimes A comes out negative. This is significant, since
858 A has more bits than a long int does. */
867 #if defined(L_fixtfdi) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
872 return - __fixunstfDI (-a
);
873 return __fixunstfDI (a
);
877 #if defined(L_fixunsxfdi) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96)
878 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
879 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
882 __fixunsxfDI (XFtype a
)
890 /* Compute high word of result, as a flonum. */
891 b
= (a
/ HIGH_WORD_COEFF
);
892 /* Convert that to fixed (but not to DWtype!),
893 and shift it into the high word. */
896 /* Remove high part from the XFtype, leaving the low part as flonum. */
898 /* Convert that to fixed (but not to DWtype!) and add it in.
899 Sometimes A comes out negative. This is significant, since
900 A has more bits than a long int does. */
909 #if defined(L_fixxfdi) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96)
914 return - __fixunsxfDI (-a
);
915 return __fixunsxfDI (a
);
920 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
921 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
924 __fixunsdfDI (DFtype a
)
932 /* Compute high word of result, as a flonum. */
933 b
= (a
/ HIGH_WORD_COEFF
);
934 /* Convert that to fixed (but not to DWtype!),
935 and shift it into the high word. */
938 /* Remove high part from the DFtype, leaving the low part as flonum. */
940 /* Convert that to fixed (but not to DWtype!) and add it in.
941 Sometimes A comes out negative. This is significant, since
942 A has more bits than a long int does. */
956 return - __fixunsdfDI (-a
);
957 return __fixunsdfDI (a
);
962 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
963 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
966 __fixunssfDI (SFtype original_a
)
968 /* Convert the SFtype to a DFtype, because that is surely not going
969 to lose any bits. Some day someone else can write a faster version
970 that avoids converting to DFtype, and verify it really works right. */
971 DFtype a
= original_a
;
978 /* Compute high word of result, as a flonum. */
979 b
= (a
/ HIGH_WORD_COEFF
);
980 /* Convert that to fixed (but not to DWtype!),
981 and shift it into the high word. */
984 /* Remove high part from the DFtype, leaving the low part as flonum. */
986 /* Convert that to fixed (but not to DWtype!) and add it in.
987 Sometimes A comes out negative. This is significant, since
988 A has more bits than a long int does. */
1002 return - __fixunssfDI (-a
);
1003 return __fixunssfDI (a
);
1007 #if defined(L_floatdixf) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96)
1008 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
1009 #define HIGH_HALFWORD_COEFF (((UDWtype) 1) << (WORD_SIZE / 2))
1010 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
1013 __floatdixf (DWtype u
)
1017 d
= (Wtype
) (u
>> WORD_SIZE
);
1018 d
*= HIGH_HALFWORD_COEFF
;
1019 d
*= HIGH_HALFWORD_COEFF
;
1020 d
+= (UWtype
) (u
& (HIGH_WORD_COEFF
- 1));
1026 #if defined(L_floatditf) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
1027 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
1028 #define HIGH_HALFWORD_COEFF (((UDWtype) 1) << (WORD_SIZE / 2))
1029 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
1032 __floatditf (DWtype u
)
1036 d
= (Wtype
) (u
>> WORD_SIZE
);
1037 d
*= HIGH_HALFWORD_COEFF
;
1038 d
*= HIGH_HALFWORD_COEFF
;
1039 d
+= (UWtype
) (u
& (HIGH_WORD_COEFF
- 1));
1046 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
1047 #define HIGH_HALFWORD_COEFF (((UDWtype) 1) << (WORD_SIZE / 2))
1048 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
1051 __floatdidf (DWtype u
)
1055 d
= (Wtype
) (u
>> WORD_SIZE
);
1056 d
*= HIGH_HALFWORD_COEFF
;
1057 d
*= HIGH_HALFWORD_COEFF
;
1058 d
+= (UWtype
) (u
& (HIGH_WORD_COEFF
- 1));
1065 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
1066 #define HIGH_HALFWORD_COEFF (((UDWtype) 1) << (WORD_SIZE / 2))
1067 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
1068 #define DI_SIZE (sizeof (DWtype) * BITS_PER_UNIT)
1070 /* Define codes for all the float formats that we know of. Note
1071 that this is copied from real.h. */
1073 #define UNKNOWN_FLOAT_FORMAT 0
1074 #define IEEE_FLOAT_FORMAT 1
1075 #define VAX_FLOAT_FORMAT 2
1076 #define IBM_FLOAT_FORMAT 3
1078 /* Default to IEEE float if not specified. Nearly all machines use it. */
1079 #ifndef HOST_FLOAT_FORMAT
1080 #define HOST_FLOAT_FORMAT IEEE_FLOAT_FORMAT
1083 #if HOST_FLOAT_FORMAT == IEEE_FLOAT_FORMAT
1088 #if HOST_FLOAT_FORMAT == IBM_FLOAT_FORMAT
1093 #if HOST_FLOAT_FORMAT == VAX_FLOAT_FORMAT
1099 __floatdisf (DWtype u
)
1101 /* Do the calculation in DFmode
1102 so that we don't lose any of the precision of the high word
1103 while multiplying it. */
1106 /* Protect against double-rounding error.
1107 Represent any low-order bits, that might be truncated in DFmode,
1108 by a bit that won't be lost. The bit can go in anywhere below the
1109 rounding position of the SFmode. A fixed mask and bit position
1110 handles all usual configurations. It doesn't handle the case
1111 of 128-bit DImode, however. */
1112 if (DF_SIZE
< DI_SIZE
1113 && DF_SIZE
> (DI_SIZE
- DF_SIZE
+ SF_SIZE
))
1115 #define REP_BIT ((UDWtype) 1 << (DI_SIZE - DF_SIZE))
1116 if (! (- ((DWtype
) 1 << DF_SIZE
) < u
1117 && u
< ((DWtype
) 1 << DF_SIZE
)))
1119 if ((UDWtype
) u
& (REP_BIT
- 1))
1123 f
= (Wtype
) (u
>> WORD_SIZE
);
1124 f
*= HIGH_HALFWORD_COEFF
;
1125 f
*= HIGH_HALFWORD_COEFF
;
1126 f
+= (UWtype
) (u
& (HIGH_WORD_COEFF
- 1));
1132 #if defined(L_fixunsxfsi) && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
1133 /* Reenable the normal types, in case limits.h needs them. */
1146 __fixunsxfSI (XFtype a
)
1148 if (a
>= - (DFtype
) Wtype_MIN
)
1149 return (Wtype
) (a
+ Wtype_MIN
) - Wtype_MIN
;
1155 /* Reenable the normal types, in case limits.h needs them. */
1168 __fixunsdfSI (DFtype a
)
1170 if (a
>= - (DFtype
) Wtype_MIN
)
1171 return (Wtype
) (a
+ Wtype_MIN
) - Wtype_MIN
;
1177 /* Reenable the normal types, in case limits.h needs them. */
1190 __fixunssfSI (SFtype a
)
1192 if (a
>= - (SFtype
) Wtype_MIN
)
1193 return (Wtype
) (a
+ Wtype_MIN
) - Wtype_MIN
;
1198 /* From here on down, the routines use normal data types. */
1200 #define SItype bogus_type
1201 #define USItype bogus_type
1202 #define DItype bogus_type
1203 #define UDItype bogus_type
1204 #define SFtype bogus_type
1205 #define DFtype bogus_type
1223 /* Like bcmp except the sign is meaningful.
1224 Result is negative if S1 is less than S2,
1225 positive if S1 is greater, 0 if S1 and S2 are equal. */
1228 __gcc_bcmp (const unsigned char *s1
, const unsigned char *s2
, size_t size
)
1232 unsigned char c1
= *s1
++, c2
= *s2
++;
1242 /* __eprintf used to be used by GCC's private version of <assert.h>.
1243 We no longer provide that header, but this routine remains in libgcc.a
1244 for binary backward compatibility. Note that it is not included in
1245 the shared version of libgcc. */
1247 #ifndef inhibit_libc
1249 #undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */
1253 __eprintf (const char *string
, const char *expression
,
1254 unsigned int line
, const char *filename
)
1256 fprintf (stderr
, string
, expression
, line
, filename
);
1266 #if LONG_TYPE_SIZE == GCOV_TYPE_SIZE
1267 typedef long gcov_type
;
1269 typedef long long gcov_type
;
1273 /* Structure emitted by -a */
1277 const char *filename
;
1281 const unsigned long *addresses
;
1283 /* Older GCC's did not emit these fields. */
1285 const char **functions
;
1286 const long *line_nums
;
1287 const char **filenames
;
1291 #ifndef inhibit_libc
1293 /* Simple minded basic block profiling output dumper for
1294 systems that don't provide tcov support. At present,
1295 it requires atexit and stdio. */
1297 #undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */
1300 #include "gbl-ctors.h"
1301 #include "gcov-io.h"
1303 #ifdef TARGET_HAS_F_SETLKW
1308 static struct bb
*bb_head
;
1311 __bb_exit_func (void)
1320 i
= strlen (bb_head
->filename
) - 3;
1323 for (ptr
= bb_head
; ptr
!= (struct bb
*) 0; ptr
= ptr
->next
)
1327 /* Make sure the output file exists -
1328 but don't clobber exiting data. */
1329 if ((da_file
= fopen (ptr
->filename
, "a")) != 0)
1332 /* Need to re-open in order to be able to write from the start. */
1333 da_file
= fopen (ptr
->filename
, "r+b");
1334 /* Some old systems might not allow the 'b' mode modifier.
1335 Therefore, try to open without it. This can lead to a race
1336 condition so that when you delete and re-create the file, the
1337 file might be opened in text mode, but then, you shouldn't
1338 delete the file in the first place. */
1340 da_file
= fopen (ptr
->filename
, "r+");
1343 fprintf (stderr
, "arc profiling: Can't open output file %s.\n",
1348 /* After a fork, another process might try to read and/or write
1349 the same file simultanously. So if we can, lock the file to
1350 avoid race conditions. */
1351 #if defined (TARGET_HAS_F_SETLKW)
1353 struct flock s_flock
;
1355 s_flock
.l_type
= F_WRLCK
;
1356 s_flock
.l_whence
= SEEK_SET
;
1357 s_flock
.l_start
= 0;
1359 s_flock
.l_pid
= getpid ();
1361 while (fcntl (fileno (da_file
), F_SETLKW
, &s_flock
)
1366 /* If the file is not empty, and the number of counts in it is the
1367 same, then merge them in. */
1368 firstchar
= fgetc (da_file
);
1369 if (firstchar
== EOF
)
1371 if (ferror (da_file
))
1373 fprintf (stderr
, "arc profiling: Can't read output file ");
1374 perror (ptr
->filename
);
1381 if (ungetc (firstchar
, da_file
) == EOF
)
1383 if (__read_long (&n_counts
, da_file
, 8) != 0)
1385 fprintf (stderr
, "arc profiling: Can't read output file %s.\n",
1390 if (n_counts
== ptr
->ncounts
)
1394 for (i
= 0; i
< n_counts
; i
++)
1398 if (__read_gcov_type (&v
, da_file
, 8) != 0)
1401 "arc profiling: Can't read output file %s.\n",
1405 ptr
->counts
[i
] += v
;
1413 /* ??? Should first write a header to the file. Preferably, a 4 byte
1414 magic number, 4 bytes containing the time the program was
1415 compiled, 4 bytes containing the last modification time of the
1416 source file, and 4 bytes indicating the compiler options used.
1418 That way we can easily verify that the proper source/executable/
1419 data file combination is being used from gcov. */
1421 if (__write_gcov_type (ptr
->ncounts
, da_file
, 8) != 0)
1424 fprintf (stderr
, "arc profiling: Error writing output file %s.\n",
1430 gcov_type
*count_ptr
= ptr
->counts
;
1432 for (j
= ptr
->ncounts
; j
> 0; j
--)
1434 if (__write_gcov_type (*count_ptr
, da_file
, 8) != 0)
1442 fprintf (stderr
, "arc profiling: Error writing output file %s.\n",
1446 if (fclose (da_file
) == EOF
)
1447 fprintf (stderr
, "arc profiling: Error closing output file %s.\n",
1455 __bb_init_func (struct bb
*blocks
)
1457 /* User is supposed to check whether the first word is non-0,
1458 but just in case.... */
1460 if (blocks
->zero_word
)
1463 /* Initialize destructor. */
1465 atexit (__bb_exit_func
);
1467 /* Set up linked list. */
1468 blocks
->zero_word
= 1;
1469 blocks
->next
= bb_head
;
1473 /* Called before fork or exec - write out profile information gathered so
1474 far and reset it to zero. This avoids duplication or loss of the
1475 profile information gathered so far. */
1477 __bb_fork_func (void)
1482 for (ptr
= bb_head
; ptr
!= (struct bb
*) 0; ptr
= ptr
->next
)
1485 for (i
= ptr
->ncounts
- 1; i
>= 0; i
--)
1490 #endif /* not inhibit_libc */
1493 #ifdef L_clear_cache
1494 /* Clear part of an instruction cache. */
1496 #define INSN_CACHE_PLANE_SIZE (INSN_CACHE_SIZE / INSN_CACHE_DEPTH)
1499 __clear_cache (char *beg
__attribute__((__unused__
)),
1500 char *end
__attribute__((__unused__
)))
1502 #ifdef CLEAR_INSN_CACHE
1503 CLEAR_INSN_CACHE (beg
, end
);
1505 #ifdef INSN_CACHE_SIZE
1506 static char array
[INSN_CACHE_SIZE
+ INSN_CACHE_PLANE_SIZE
+ INSN_CACHE_LINE_WIDTH
];
1507 static int initialized
;
1511 typedef (*function_ptr
) (void);
1513 #if (INSN_CACHE_SIZE / INSN_CACHE_LINE_WIDTH) < 16
1514 /* It's cheaper to clear the whole cache.
1515 Put in a series of jump instructions so that calling the beginning
1516 of the cache will clear the whole thing. */
1520 int ptr
= (((int) array
+ INSN_CACHE_LINE_WIDTH
- 1)
1521 & -INSN_CACHE_LINE_WIDTH
);
1522 int end_ptr
= ptr
+ INSN_CACHE_SIZE
;
1524 while (ptr
< end_ptr
)
1526 *(INSTRUCTION_TYPE
*)ptr
1527 = JUMP_AHEAD_INSTRUCTION
+ INSN_CACHE_LINE_WIDTH
;
1528 ptr
+= INSN_CACHE_LINE_WIDTH
;
1530 *(INSTRUCTION_TYPE
*) (ptr
- INSN_CACHE_LINE_WIDTH
) = RETURN_INSTRUCTION
;
1535 /* Call the beginning of the sequence. */
1536 (((function_ptr
) (((int) array
+ INSN_CACHE_LINE_WIDTH
- 1)
1537 & -INSN_CACHE_LINE_WIDTH
))
1540 #else /* Cache is large. */
1544 int ptr
= (((int) array
+ INSN_CACHE_LINE_WIDTH
- 1)
1545 & -INSN_CACHE_LINE_WIDTH
);
1547 while (ptr
< (int) array
+ sizeof array
)
1549 *(INSTRUCTION_TYPE
*)ptr
= RETURN_INSTRUCTION
;
1550 ptr
+= INSN_CACHE_LINE_WIDTH
;
1556 /* Find the location in array that occupies the same cache line as BEG. */
1558 offset
= ((int) beg
& -INSN_CACHE_LINE_WIDTH
) & (INSN_CACHE_PLANE_SIZE
- 1);
1559 start_addr
= (((int) (array
+ INSN_CACHE_PLANE_SIZE
- 1)
1560 & -INSN_CACHE_PLANE_SIZE
)
1563 /* Compute the cache alignment of the place to stop clearing. */
1564 #if 0 /* This is not needed for gcc's purposes. */
1565 /* If the block to clear is bigger than a cache plane,
1566 we clear the entire cache, and OFFSET is already correct. */
1567 if (end
< beg
+ INSN_CACHE_PLANE_SIZE
)
1569 offset
= (((int) (end
+ INSN_CACHE_LINE_WIDTH
- 1)
1570 & -INSN_CACHE_LINE_WIDTH
)
1571 & (INSN_CACHE_PLANE_SIZE
- 1));
1573 #if INSN_CACHE_DEPTH > 1
1574 end_addr
= (start_addr
& -INSN_CACHE_PLANE_SIZE
) + offset
;
1575 if (end_addr
<= start_addr
)
1576 end_addr
+= INSN_CACHE_PLANE_SIZE
;
1578 for (plane
= 0; plane
< INSN_CACHE_DEPTH
; plane
++)
1580 int addr
= start_addr
+ plane
* INSN_CACHE_PLANE_SIZE
;
1581 int stop
= end_addr
+ plane
* INSN_CACHE_PLANE_SIZE
;
1583 while (addr
!= stop
)
1585 /* Call the return instruction at ADDR. */
1586 ((function_ptr
) addr
) ();
1588 addr
+= INSN_CACHE_LINE_WIDTH
;
1591 #else /* just one plane */
1594 /* Call the return instruction at START_ADDR. */
1595 ((function_ptr
) start_addr
) ();
1597 start_addr
+= INSN_CACHE_LINE_WIDTH
;
1599 while ((start_addr
% INSN_CACHE_SIZE
) != offset
);
1600 #endif /* just one plane */
1601 #endif /* Cache is large */
1602 #endif /* Cache exists */
1603 #endif /* CLEAR_INSN_CACHE */
1606 #endif /* L_clear_cache */
1610 /* Jump to a trampoline, loading the static chain address. */
1612 #if defined(_WIN32) && ! defined(__CYGWIN__) && ! defined (_UWIN)
1625 extern int VirtualProtect (char *, int, int, int *) __attribute__((stdcall));
1629 mprotect (char *addr
, int len
, int prot
)
1646 if (VirtualProtect (addr
, len
, np
, &op
))
1652 #endif /* _WIN32 && ! __CYGWIN__ && ! _UWIN */
1654 #ifdef TRANSFER_FROM_TRAMPOLINE
1655 TRANSFER_FROM_TRAMPOLINE
1658 #if defined (NeXT) && defined (__MACH__)
1660 /* Make stack executable so we can call trampolines on stack.
1661 This is called from INITIALIZE_TRAMPOLINE in next.h. */
1665 #include <mach/mach.h>
1669 __enable_execute_stack (char *addr
)
1672 char *eaddr
= addr
+ TRAMPOLINE_SIZE
;
1673 vm_address_t a
= (vm_address_t
) addr
;
1675 /* turn on execute access on stack */
1676 r
= vm_protect (task_self (), a
, TRAMPOLINE_SIZE
, FALSE
, VM_PROT_ALL
);
1677 if (r
!= KERN_SUCCESS
)
1679 mach_error("vm_protect VM_PROT_ALL", r
);
1683 /* We inline the i-cache invalidation for speed */
1685 #ifdef CLEAR_INSN_CACHE
1686 CLEAR_INSN_CACHE (addr
, eaddr
);
1688 __clear_cache ((int) addr
, (int) eaddr
);
1692 #endif /* defined (NeXT) && defined (__MACH__) */
1696 /* Make stack executable so we can call trampolines on stack.
1697 This is called from INITIALIZE_TRAMPOLINE in convex.h. */
1699 #include <sys/mman.h>
1700 #include <sys/vmparam.h>
1701 #include <machine/machparam.h>
1704 __enable_execute_stack (void)
1707 static unsigned lowest
= USRSTACK
;
1708 unsigned current
= (unsigned) &fp
& -NBPG
;
1710 if (lowest
> current
)
1712 unsigned len
= lowest
- current
;
1713 mremap (current
, &len
, PROT_READ
| PROT_WRITE
| PROT_EXEC
, MAP_PRIVATE
);
1717 /* Clear instruction cache in case an old trampoline is in it. */
1720 #endif /* __convex__ */
1724 /* Modified from the convex -code above. */
1726 #include <sys/param.h>
1728 #include <sys/m88kbcs.h>
1731 __enable_execute_stack (void)
1734 static unsigned long lowest
= USRSTACK
;
1735 unsigned long current
= (unsigned long) &save_errno
& -NBPC
;
1737 /* Ignore errno being set. memctl sets errno to EINVAL whenever the
1738 address is seen as 'negative'. That is the case with the stack. */
1741 if (lowest
> current
)
1743 unsigned len
=lowest
-current
;
1744 memctl(current
,len
,MCT_TEXT
);
1748 memctl(current
,NBPC
,MCT_TEXT
);
1752 #endif /* __sysV88__ */
1756 #include <sys/signal.h>
1759 /* Motorola forgot to put memctl.o in the libp version of libc881.a,
1760 so define it here, because we need it in __clear_insn_cache below */
1761 /* On older versions of this OS, no memctl or MCT_TEXT are defined;
1762 hence we enable this stuff only if MCT_TEXT is #define'd. */
1777 /* Clear instruction cache so we can call trampolines on stack.
1778 This is called from FINALIZE_TRAMPOLINE in mot3300.h. */
1781 __clear_insn_cache (void)
1786 /* Preserve errno, because users would be surprised to have
1787 errno changing without explicitly calling any system-call. */
1790 /* Keep it simple : memctl (MCT_TEXT) always fully clears the insn cache.
1791 No need to use an address derived from _start or %sp, as 0 works also. */
1792 memctl(0, 4096, MCT_TEXT
);
1797 #endif /* __sysV68__ */
1801 #undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */
1803 #include <sys/mman.h>
1804 #include <sys/types.h>
1805 #include <sys/param.h>
1806 #include <sys/vmmac.h>
1808 /* Modified from the convex -code above.
1809 mremap promises to clear the i-cache. */
1812 __enable_execute_stack (void)
1815 if (mprotect (((unsigned int)&fp
/PAGSIZ
)*PAGSIZ
, PAGSIZ
,
1816 PROT_READ
|PROT_WRITE
|PROT_EXEC
))
1818 perror ("mprotect in __enable_execute_stack");
1823 #endif /* __pyr__ */
1825 #if defined (sony_news) && defined (SYSTYPE_BSD)
1828 #include <sys/types.h>
1829 #include <sys/param.h>
1830 #include <syscall.h>
1831 #include <machine/sysnews.h>
1833 /* cacheflush function for NEWS-OS 4.2.
1834 This function is called from trampoline-initialize code
1835 defined in config/mips/mips.h. */
1838 cacheflush (char *beg
, int size
, int flag
)
1840 if (syscall (SYS_sysnews
, NEWS_CACHEFLUSH
, beg
, size
, FLUSH_BCACHE
))
1842 perror ("cache_flush");
1848 #endif /* sony_news */
1849 #endif /* L_trampoline */
1851 #if !defined __CYGWIN__ && !defined __MINGW32__
1853 #include "gbl-ctors.h"
1854 /* Some systems use __main in a way incompatible with its use in gcc, in these
1855 cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
1856 give the same symbol without quotes for an alternative entry point. You
1857 must define both, or neither. */
1859 #define NAME__MAIN "__main"
1860 #define SYMBOL__MAIN __main
1863 #ifdef INIT_SECTION_ASM_OP
1864 #undef HAS_INIT_SECTION
1865 #define HAS_INIT_SECTION
1868 #if !defined (HAS_INIT_SECTION) || !defined (OBJECT_FORMAT_ELF)
1870 /* Some ELF crosses use crtstuff.c to provide __CTOR_LIST__, but use this
1871 code to run constructors. In that case, we need to handle EH here, too. */
1873 #ifdef EH_FRAME_SECTION_NAME
1874 #include "unwind-dw2-fde.h"
1875 extern unsigned char __EH_FRAME_BEGIN__
[];
1878 /* Run all the global destructors on exit from the program. */
1881 __do_global_dtors (void)
1883 #ifdef DO_GLOBAL_DTORS_BODY
1884 DO_GLOBAL_DTORS_BODY
;
1886 static func_ptr
*p
= __DTOR_LIST__
+ 1;
1893 #if defined (EH_FRAME_SECTION_NAME) && !defined (HAS_INIT_SECTION)
1895 static int completed
= 0;
1899 __deregister_frame_info (__EH_FRAME_BEGIN__
);
1906 #ifndef HAS_INIT_SECTION
1907 /* Run all the global constructors on entry to the program. */
1910 __do_global_ctors (void)
1912 #ifdef EH_FRAME_SECTION_NAME
1914 static struct object object
;
1915 __register_frame_info (__EH_FRAME_BEGIN__
, &object
);
1918 DO_GLOBAL_CTORS_BODY
;
1919 atexit (__do_global_dtors
);
1921 #endif /* no HAS_INIT_SECTION */
1923 #if !defined (HAS_INIT_SECTION) || defined (INVOKE__main)
1924 /* Subroutine called automatically by `main'.
1925 Compiling a global function named `main'
1926 produces an automatic call to this function at the beginning.
1928 For many systems, this routine calls __do_global_ctors.
1929 For systems which support a .init section we use the .init section
1930 to run __do_global_ctors, so we need not do anything here. */
1935 /* Support recursive calls to `main': run initializers just once. */
1936 static int initialized
;
1940 __do_global_ctors ();
1943 #endif /* no HAS_INIT_SECTION or INVOKE__main */
1945 #endif /* L__main */
1946 #endif /* __CYGWIN__ */
1950 #include "gbl-ctors.h"
1952 /* Provide default definitions for the lists of constructors and
1953 destructors, so that we don't get linker errors. These symbols are
1954 intentionally bss symbols, so that gld and/or collect will provide
1955 the right values. */
1957 /* We declare the lists here with two elements each,
1958 so that they are valid empty lists if no other definition is loaded.
1960 If we are using the old "set" extensions to have the gnu linker
1961 collect ctors and dtors, then we __CTOR_LIST__ and __DTOR_LIST__
1962 must be in the bss/common section.
1964 Long term no port should use those extensions. But many still do. */
1965 #if !defined(INIT_SECTION_ASM_OP) && !defined(CTOR_LISTS_DEFINED_EXTERNALLY)
1966 #if defined (TARGET_ASM_CONSTRUCTOR) || defined (USE_COLLECT2)
1967 func_ptr __CTOR_LIST__
[2] = {0, 0};
1968 func_ptr __DTOR_LIST__
[2] = {0, 0};
1970 func_ptr __CTOR_LIST__
[2];
1971 func_ptr __DTOR_LIST__
[2];
1973 #endif /* no INIT_SECTION_ASM_OP and not CTOR_LISTS_DEFINED_EXTERNALLY */
1974 #endif /* L_ctors */
1978 #include "gbl-ctors.h"
1986 static func_ptr
*atexit_chain
= 0;
1987 static long atexit_chain_length
= 0;
1988 static volatile long last_atexit_chain_slot
= -1;
1991 atexit (func_ptr func
)
1993 if (++last_atexit_chain_slot
== atexit_chain_length
)
1995 atexit_chain_length
+= 32;
1997 atexit_chain
= (func_ptr
*) realloc (atexit_chain
, atexit_chain_length
1998 * sizeof (func_ptr
));
2000 atexit_chain
= (func_ptr
*) malloc (atexit_chain_length
2001 * sizeof (func_ptr
));
2004 atexit_chain_length
= 0;
2005 last_atexit_chain_slot
= -1;
2010 atexit_chain
[last_atexit_chain_slot
] = func
;
2014 extern void _cleanup (void);
2015 extern void _exit (int) __attribute__ ((__noreturn__
));
2022 for ( ; last_atexit_chain_slot
-- >= 0; )
2024 (*atexit_chain
[last_atexit_chain_slot
+ 1]) ();
2025 atexit_chain
[last_atexit_chain_slot
+ 1] = 0;
2027 free (atexit_chain
);
2040 /* Simple; we just need a wrapper for ON_EXIT. */
2042 atexit (func_ptr func
)
2044 return ON_EXIT (func
);
2047 #endif /* ON_EXIT */
2048 #endif /* NEED_ATEXIT */