/* More subroutines needed by GCC output code on some machines. */
/* Compile this one with gcc. */
-/* Copyright (C) 1989, 92, 93, 94, 95, 96, 97, 98, 1999, 2000
- Free Software Foundation, Inc.
+/* Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ 2000, 2001 Free Software Foundation, Inc.
This file is part of GNU CC.
the Free Software Foundation; either version 2, or (at your option)
any later version.
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
GNU CC 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
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
-
/* It is incorrect to include config.h here, because this file is being
compiled for the target, and hence definitions concerning only the host
do not apply. */
#include "tsystem.h"
#include "machmode.h"
-#include "defaults.h"
/* Don't use `fancy_abort' here even if config.h says to use it. */
#ifdef abort
#undef abort
#endif
-/* In a cross-compilation situation, default to inhibiting compilation
- of routines that use libc. */
-
-#if defined(CROSS_COMPILE) && !defined(inhibit_libc)
-#define inhibit_libc
-#endif
-
#include "libgcc2.h"
\f
#if defined (L_negdi2) || defined (L_divdi3) || defined (L_moddi3)
return w.ll;
}
#endif
+
+#ifdef L_addvsi3
+Wtype
+__addvsi3 (Wtype a, Wtype b)
+{
+ Wtype w;
+
+ w = a + b;
+
+ if (b >= 0 ? w < a : w > a)
+ abort ();
+
+ return w;
+}
+#endif
+\f
+#ifdef L_addvdi3
+DWtype
+__addvdi3 (DWtype a, DWtype b)
+{
+ DWtype w;
+
+ w = a + b;
+
+ if (b >= 0 ? w < a : w > a)
+ abort ();
+
+ return w;
+}
+#endif
+\f
+#ifdef L_subvsi3
+Wtype
+__subvsi3 (Wtype a, Wtype b)
+{
+#ifdef L_addvsi3
+ return __addvsi3 (a, (-b));
+#else
+ DWtype w;
+
+ w = a - b;
+
+ if (b >= 0 ? w > a : w < a)
+ abort ();
+
+ return w;
+#endif
+}
+#endif
\f
+#ifdef L_subvdi3
+DWtype
+__subvdi3 (DWtype a, DWtype b)
+{
+#ifdef L_addvdi3
+ return (a, (-b));
+#else
+ DWtype w;
+
+ w = a - b;
+
+ if (b >= 0 ? w > a : w < a)
+ abort ();
+
+ return w;
+#endif
+}
+#endif
+\f
+#ifdef L_mulvsi3
+Wtype
+__mulvsi3 (Wtype a, Wtype b)
+{
+ DWtype w;
+
+ w = a * b;
+
+ if (((a >= 0) == (b >= 0)) ? w < 0 : w > 0)
+ abort ();
+
+ return w;
+}
+#endif
+\f
+#ifdef L_negvsi2
+Wtype
+__negvsi2 (Wtype a)
+{
+ Wtype w;
+
+ w = -a;
+
+ if (a >= 0 ? w > 0 : w < 0)
+ abort ();
+
+ return w;
+}
+#endif
+\f
+#ifdef L_negvdi2
+DWtype
+__negvdi2 (DWtype a)
+{
+ DWtype w;
+
+ w = -a;
+
+ if (a >= 0 ? w > 0 : w < 0)
+ abort ();
+
+ return w;
+}
+#endif
+\f
+#ifdef L_absvsi2
+Wtype
+__absvsi2 (Wtype a)
+{
+ Wtype w = a;
+
+ if (a < 0)
+#ifdef L_negvsi2
+ w = __negvsi2 (a);
+#else
+ w = -a;
+
+ if (w < 0)
+ abort ();
+#endif
+
+ return w;
+}
+#endif
+\f
+#ifdef L_absvdi2
+DWtype
+__absvdi2 (DWtype a)
+{
+ DWtype w = a;
+
+ if (a < 0)
+#ifdef L_negvsi2
+ w = __negvsi2 (a);
+#else
+ w = -a;
+
+ if (w < 0)
+ abort ();
+#endif
+
+ return w;
+}
+#endif
+\f
+#ifdef L_mulvdi3
+DWtype
+__mulvdi3 (DWtype u, DWtype v)
+{
+ DWtype w;
+
+ w = u * v;
+
+ if (((u >= 0) == (v >= 0)) ? w < 0 : w > 0)
+ abort ();
+
+ return w;
+}
+#endif
+\f
+
/* Unless shift functions are defined whith full ANSI prototypes,
parameter b will be promoted to int if word_type is smaller than an int. */
#ifdef L_lshrdi3
if (bm <= 0)
{
w.s.high = 0;
- w.s.low = (UWtype)uu.s.high >> -bm;
+ w.s.low = (UWtype) uu.s.high >> -bm;
}
else
{
- UWtype carries = (UWtype)uu.s.high << bm;
- w.s.high = (UWtype)uu.s.high >> b;
- w.s.low = ((UWtype)uu.s.low >> b) | carries;
+ UWtype carries = (UWtype) uu.s.high << bm;
+
+ w.s.high = (UWtype) uu.s.high >> b;
+ w.s.low = ((UWtype) uu.s.low >> b) | carries;
}
return w.ll;
if (bm <= 0)
{
w.s.low = 0;
- w.s.high = (UWtype)uu.s.low << -bm;
+ w.s.high = (UWtype) uu.s.low << -bm;
}
else
{
- UWtype carries = (UWtype)uu.s.low >> bm;
- w.s.low = (UWtype)uu.s.low << b;
- w.s.high = ((UWtype)uu.s.high << b) | carries;
+ UWtype carries = (UWtype) uu.s.low >> bm;
+
+ w.s.low = (UWtype) uu.s.low << b;
+ w.s.high = ((UWtype) uu.s.high << b) | carries;
}
return w.ll;
}
else
{
- UWtype carries = (UWtype)uu.s.high << bm;
+ UWtype carries = (UWtype) uu.s.high << bm;
+
w.s.high = uu.s.high >> b;
- w.s.low = ((UWtype)uu.s.low >> b) | carries;
+ w.s.low = ((UWtype) uu.s.low >> b) | carries;
}
return w.ll;
DWtype
__ffsdi2 (DWtype u)
{
- DWunion uu, w;
+ DWunion uu;
+ UWtype word, count, add;
+
uu.ll = u;
- w.s.high = 0;
- w.s.low = ffs (uu.s.low);
- if (w.s.low != 0)
- return w.ll;
- w.s.low = ffs (uu.s.high);
- if (w.s.low != 0)
- {
- w.s.low += BITS_PER_UNIT * sizeof (Wtype);
- return w.ll;
- }
- return w.ll;
+ if (uu.s.low != 0)
+ word = uu.s.low, add = 0;
+ else if (uu.s.high != 0)
+ word = uu.s.high, add = BITS_PER_UNIT * sizeof (Wtype);
+ else
+ return 0;
+
+ count_trailing_zeros (count, word);
+ return count + add + 1;
}
#endif
\f
#define L_udivmoddi4
#endif
-#ifdef L_udivmoddi4
-static const UQItype __clz_tab[] =
+#ifdef L_clz
+const UQItype __clz_tab[] =
{
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,
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,
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,
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,
};
+#endif
+
+#ifdef L_udivmoddi4
#if (defined (L_udivdi3) || defined (L_divdi3) || \
defined (L_umoddi3) || defined (L_moddi3))
#define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
DWtype
-__fixunstfdi (TFtype a)
+__fixunstfDI (TFtype a)
{
TFtype b;
UDWtype v;
__fixtfdi (TFtype a)
{
if (a < 0)
- return - __fixunstfdi (-a);
- return __fixunstfdi (a);
+ return - __fixunstfDI (-a);
+ return __fixunstfDI (a);
}
#endif
#define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
DWtype
-__fixunsxfdi (XFtype a)
+__fixunsxfDI (XFtype a)
{
XFtype b;
UDWtype v;
__fixxfdi (XFtype a)
{
if (a < 0)
- return - __fixunsxfdi (-a);
- return __fixunsxfdi (a);
+ return - __fixunsxfDI (-a);
+ return __fixunsxfDI (a);
}
#endif
#define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
DWtype
-__fixunsdfdi (DFtype a)
+__fixunsdfDI (DFtype a)
{
DFtype b;
UDWtype v;
__fixdfdi (DFtype a)
{
if (a < 0)
- return - __fixunsdfdi (-a);
- return __fixunsdfdi (a);
+ return - __fixunsdfDI (-a);
+ return __fixunsdfDI (a);
}
#endif
#define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
DWtype
-__fixunssfdi (SFtype original_a)
+__fixunssfDI (SFtype original_a)
{
/* Convert the SFtype to a DFtype, because that is surely not going
to lose any bits. Some day someone else can write a faster version
v = (UWtype) b;
v <<= WORD_SIZE;
/* Remove high part from the DFtype, leaving the low part as flonum. */
- a -= (DFtype)v;
+ a -= (DFtype) v;
/* Convert that to fixed (but not to DWtype!) and add it in.
Sometimes A comes out negative. This is significant, since
A has more bits than a long int does. */
__fixsfdi (SFtype a)
{
if (a < 0)
- return - __fixunssfdi (-a);
- return __fixunssfdi (a);
+ return - __fixunssfDI (-a);
+ return __fixunssfDI (a);
}
#endif
if (DF_SIZE < DI_SIZE
&& DF_SIZE > (DI_SIZE - DF_SIZE + SF_SIZE))
{
-#define REP_BIT ((UWtype) 1 << (DI_SIZE - DF_SIZE))
+#define REP_BIT ((UDWtype) 1 << (DI_SIZE - DF_SIZE))
if (! (- ((DWtype) 1 << DF_SIZE) < u
&& u < ((DWtype) 1 << DF_SIZE)))
{
- if ((UWtype) u & (REP_BIT - 1))
+ if ((UDWtype) u & (REP_BIT - 1))
u |= REP_BIT;
}
}
#include <limits.h>
UWtype
-__fixunsxfsi (XFtype a)
+__fixunsxfSI (XFtype a)
{
- if (a >= - (DFtype) LONG_MIN)
- return (Wtype) (a + LONG_MIN) - LONG_MIN;
+ if (a >= - (DFtype) Wtype_MIN)
+ return (Wtype) (a + Wtype_MIN) - Wtype_MIN;
return (Wtype) a;
}
#endif
#include <limits.h>
UWtype
-__fixunsdfsi (DFtype a)
+__fixunsdfSI (DFtype a)
{
- if (a >= - (DFtype) LONG_MIN)
- return (Wtype) (a + LONG_MIN) - LONG_MIN;
+ if (a >= - (DFtype) Wtype_MIN)
+ return (Wtype) (a + Wtype_MIN) - Wtype_MIN;
return (Wtype) a;
}
#endif
#include <limits.h>
UWtype
-__fixunssfsi (SFtype a)
+__fixunssfSI (SFtype a)
{
- if (a >= - (SFtype) LONG_MIN)
- return (Wtype) (a + LONG_MIN) - LONG_MIN;
+ if (a >= - (SFtype) Wtype_MIN)
+ return (Wtype) (a + Wtype_MIN) - Wtype_MIN;
return (Wtype) a;
}
#endif
}
#endif
-\f\f
-#ifdef L__dummy
-void
-__dummy (void) {}
-#endif
-
-#ifdef L_varargs
-#ifdef __i860__
-#if defined(__svr4__) || defined(__alliant__)
- asm (" .text");
- asm (" .align 4");
-
-/* The Alliant needs the added underscore. */
- asm (".globl __builtin_saveregs");
-asm ("__builtin_saveregs:");
- asm (".globl ___builtin_saveregs");
-asm ("___builtin_saveregs:");
-
- asm (" andnot 0x0f,%sp,%sp"); /* round down to 16-byte boundary */
- asm (" adds -96,%sp,%sp"); /* allocate stack space for reg save
- area and also for a new va_list
- structure */
- /* Save all argument registers in the arg reg save area. The
- arg reg save area must have the following layout (according
- to the svr4 ABI):
-
- struct {
- union {
- float freg[8];
- double dreg[4];
- } float_regs;
- long ireg[12];
- };
- */
-
- asm (" fst.q %f8, 0(%sp)"); /* save floating regs (f8-f15) */
- asm (" fst.q %f12,16(%sp)");
-
- asm (" st.l %r16,32(%sp)"); /* save integer regs (r16-r27) */
- asm (" st.l %r17,36(%sp)");
- asm (" st.l %r18,40(%sp)");
- asm (" st.l %r19,44(%sp)");
- asm (" st.l %r20,48(%sp)");
- asm (" st.l %r21,52(%sp)");
- asm (" st.l %r22,56(%sp)");
- asm (" st.l %r23,60(%sp)");
- asm (" st.l %r24,64(%sp)");
- asm (" st.l %r25,68(%sp)");
- asm (" st.l %r26,72(%sp)");
- asm (" st.l %r27,76(%sp)");
-
- asm (" adds 80,%sp,%r16"); /* compute the address of the new
- va_list structure. Put in into
- r16 so that it will be returned
- to the caller. */
-
- /* Initialize all fields of the new va_list structure. This
- structure looks like:
-
- typedef struct {
- unsigned long ireg_used;
- unsigned long freg_used;
- long *reg_base;
- long *mem_ptr;
- } va_list;
- */
-
- asm (" st.l %r0, 0(%r16)"); /* nfixed */
- asm (" st.l %r0, 4(%r16)"); /* nfloating */
- asm (" st.l %sp, 8(%r16)"); /* __va_ctl points to __va_struct. */
- asm (" bri %r1"); /* delayed return */
- asm (" st.l %r28,12(%r16)"); /* pointer to overflow args */
-
-#else /* not __svr4__ */
-#if defined(__PARAGON__)
- /*
- * we'll use SVR4-ish varargs but need SVR3.2 assembler syntax,
- * and we stand a better chance of hooking into libraries
- * compiled by PGI. [andyp@ssd.intel.com]
- */
- asm (" .text");
- asm (" .align 4");
- asm (".globl __builtin_saveregs");
-asm ("__builtin_saveregs:");
- asm (".globl ___builtin_saveregs");
-asm ("___builtin_saveregs:");
-
- asm (" andnot 0x0f,sp,sp"); /* round down to 16-byte boundary */
- asm (" adds -96,sp,sp"); /* allocate stack space for reg save
- area and also for a new va_list
- structure */
- /* Save all argument registers in the arg reg save area. The
- arg reg save area must have the following layout (according
- to the svr4 ABI):
-
- struct {
- union {
- float freg[8];
- double dreg[4];
- } float_regs;
- long ireg[12];
- };
- */
-
- asm (" fst.q f8, 0(sp)");
- asm (" fst.q f12,16(sp)");
- asm (" st.l r16,32(sp)");
- asm (" st.l r17,36(sp)");
- asm (" st.l r18,40(sp)");
- asm (" st.l r19,44(sp)");
- asm (" st.l r20,48(sp)");
- asm (" st.l r21,52(sp)");
- asm (" st.l r22,56(sp)");
- asm (" st.l r23,60(sp)");
- asm (" st.l r24,64(sp)");
- asm (" st.l r25,68(sp)");
- asm (" st.l r26,72(sp)");
- asm (" st.l r27,76(sp)");
-
- asm (" adds 80,sp,r16"); /* compute the address of the new
- va_list structure. Put in into
- r16 so that it will be returned
- to the caller. */
-
- /* Initialize all fields of the new va_list structure. This
- structure looks like:
-
- typedef struct {
- unsigned long ireg_used;
- unsigned long freg_used;
- long *reg_base;
- long *mem_ptr;
- } va_list;
- */
-
- asm (" st.l r0, 0(r16)"); /* nfixed */
- asm (" st.l r0, 4(r16)"); /* nfloating */
- asm (" st.l sp, 8(r16)"); /* __va_ctl points to __va_struct. */
- asm (" bri r1"); /* delayed return */
- asm (" st.l r28,12(r16)"); /* pointer to overflow args */
-#else /* not __PARAGON__ */
- asm (" .text");
- asm (" .align 4");
-
- asm (".globl ___builtin_saveregs");
- asm ("___builtin_saveregs:");
- asm (" mov sp,r30");
- asm (" andnot 0x0f,sp,sp");
- asm (" adds -96,sp,sp"); /* allocate sufficient space on the stack */
-
-/* Fill in the __va_struct. */
- asm (" st.l r16, 0(sp)"); /* save integer regs (r16-r27) */
- asm (" st.l r17, 4(sp)"); /* int fixed[12] */
- asm (" st.l r18, 8(sp)");
- asm (" st.l r19,12(sp)");
- asm (" st.l r20,16(sp)");
- asm (" st.l r21,20(sp)");
- asm (" st.l r22,24(sp)");
- asm (" st.l r23,28(sp)");
- asm (" st.l r24,32(sp)");
- asm (" st.l r25,36(sp)");
- asm (" st.l r26,40(sp)");
- asm (" st.l r27,44(sp)");
-
- asm (" fst.q f8, 48(sp)"); /* save floating regs (f8-f15) */
- asm (" fst.q f12,64(sp)"); /* int floating[8] */
-
-/* Fill in the __va_ctl. */
- asm (" st.l sp, 80(sp)"); /* __va_ctl points to __va_struct. */
- asm (" st.l r28,84(sp)"); /* pointer to more args */
- asm (" st.l r0, 88(sp)"); /* nfixed */
- asm (" st.l r0, 92(sp)"); /* nfloating */
-
- asm (" adds 80,sp,r16"); /* return address of the __va_ctl. */
- asm (" bri r1");
- asm (" mov r30,sp");
- /* recover stack and pass address to start
- of data. */
-#endif /* not __PARAGON__ */
-#endif /* not __svr4__ */
-#else /* not __i860__ */
-#ifdef __sparc__
- asm (".global __builtin_saveregs");
- asm ("__builtin_saveregs:");
- asm (".global ___builtin_saveregs");
- asm ("___builtin_saveregs:");
-#ifdef NEED_PROC_COMMAND
- asm (".proc 020");
-#endif
- asm ("st %i0,[%fp+68]");
- asm ("st %i1,[%fp+72]");
- asm ("st %i2,[%fp+76]");
- asm ("st %i3,[%fp+80]");
- asm ("st %i4,[%fp+84]");
- asm ("retl");
- asm ("st %i5,[%fp+88]");
-#ifdef NEED_TYPE_COMMAND
- asm (".type __builtin_saveregs,#function");
- asm (".size __builtin_saveregs,.-__builtin_saveregs");
-#endif
-#else /* not __sparc__ */
-#if defined(__MIPSEL__) | defined(__R3000__) | defined(__R2000__) | defined(__mips__)
-
- asm (" .text");
-#ifdef __mips16
- asm (" .set nomips16");
-#endif
- asm (" .ent __builtin_saveregs");
- asm (" .globl __builtin_saveregs");
- asm ("__builtin_saveregs:");
- asm (" sw $4,0($30)");
- asm (" sw $5,4($30)");
- asm (" sw $6,8($30)");
- asm (" sw $7,12($30)");
- asm (" j $31");
- asm (" .end __builtin_saveregs");
-#else /* not __mips__, etc. */
-
-void * __attribute__ ((__noreturn__))
-__builtin_saveregs (void)
-{
- abort ();
-}
-
-#endif /* not __mips__ */
-#endif /* not __sparc__ */
-#endif /* not __i860__ */
-#endif
\f
+/* __eprintf used to be used by GCC's private version of <assert.h>.
+ We no longer provide that header, but this routine remains in libgcc.a
+ for binary backward compatibility. Note that it is not included in
+ the shared version of libgcc. */
#ifdef L_eprintf
#ifndef inhibit_libc
#undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */
#include <stdio.h>
-/* This is used by the `assert' macro. */
+
void
__eprintf (const char *string, const char *expression,
unsigned int line, const char *filename)
#undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */
#include <stdio.h>
-char *ctime ();
+char *ctime PARAMS ((const time_t *));
#include "gbl-ctors.h"
#include "gcov-io.h"
#endif /* not BLOCK_PROFILER_CODE */
#endif /* L_bb */
\f
-#ifdef L_shtab
-unsigned int __shtab[] = {
- 0x00000001, 0x00000002, 0x00000004, 0x00000008,
- 0x00000010, 0x00000020, 0x00000040, 0x00000080,
- 0x00000100, 0x00000200, 0x00000400, 0x00000800,
- 0x00001000, 0x00002000, 0x00004000, 0x00008000,
- 0x00010000, 0x00020000, 0x00040000, 0x00080000,
- 0x00100000, 0x00200000, 0x00400000, 0x00800000,
- 0x01000000, 0x02000000, 0x04000000, 0x08000000,
- 0x10000000, 0x20000000, 0x40000000, 0x80000000
- };
-#endif
-\f
#ifdef L_clear_cache
/* Clear part of an instruction cache. */
code to run constructors. In that case, we need to handle EH here, too. */
#ifdef EH_FRAME_SECTION
-#include "frame.h"
+#include "unwind-dw2-fde.h"
extern unsigned char __EH_FRAME_BEGIN__[];
#endif
#endif /* NEED_ATEXIT */
#endif /* L_exit */
-\f
-#ifdef L_eh
-
-#include "gthr.h"
-
-/* Shared exception handling support routines. */
-
-void
-__default_terminate (void)
-{
- abort ();
-}
-
-void (*__terminate_func)(void) __attribute__ ((__noreturn__)) =
- __default_terminate;
-
-void
-__terminate (void)
-{
- (*__terminate_func)();
-}
-
-void *
-__throw_type_match (void *catch_type, void *throw_type, void *obj)
-{
-#if 0
- printf ("__throw_type_match (): catch_type = %s, throw_type = %s\n",
- catch_type, throw_type);
-#endif
- if (strcmp ((const char *)catch_type, (const char *)throw_type) == 0)
- return obj;
- return 0;
-}
-
-void
-__empty (void)
-{
-}
-\f
-
-/* Include definitions of EH context and table layout */
-
-#include "eh-common.h"
-#ifndef inhibit_libc
-#include <stdio.h>
-#endif
-
-/* Allocate and return a new EH context structure. */
-
-#if __GTHREADS
-static void *
-new_eh_context (void)
-{
- struct eh_full_context {
- struct eh_context c;
- void *top_elt[2];
- } *ehfc = (struct eh_full_context *) malloc (sizeof *ehfc);
-
- if (! ehfc)
- __terminate ();
-
- memset (ehfc, 0, sizeof *ehfc);
-
- ehfc->c.dynamic_handler_chain = (void **) ehfc->top_elt;
-
- /* This should optimize out entirely. This should always be true,
- but just in case it ever isn't, don't allow bogus code to be
- generated. */
-
- if ((void*)(&ehfc->c) != (void*)ehfc)
- __terminate ();
-
- return &ehfc->c;
-}
-
-static __gthread_key_t eh_context_key;
-
-/* Destructor for struct eh_context. */
-static void
-eh_context_free (void *ptr)
-{
- __gthread_key_dtor (eh_context_key, ptr);
- if (ptr)
- free (ptr);
-}
-#endif
-
-/* Pointer to function to return EH context. */
-
-static struct eh_context *eh_context_initialize (void);
-static struct eh_context *eh_context_static (void);
-#if __GTHREADS
-static struct eh_context *eh_context_specific (void);
-#endif
-
-static struct eh_context *(*get_eh_context) (void) = &eh_context_initialize;
-
-/* Routine to get EH context.
- This one will simply call the function pointer. */
-
-void *
-__get_eh_context (void)
-{
- return (void *) (*get_eh_context) ();
-}
-
-/* Get and set the language specific info pointer. */
-
-void **
-__get_eh_info (void)
-{
- struct eh_context *eh = (*get_eh_context) ();
- return &eh->info;
-}
-\f
-#ifdef DWARF2_UNWIND_INFO
-static int dwarf_reg_size_table_initialized = 0;
-static char dwarf_reg_size_table[DWARF_FRAME_REGISTERS];
-
-static void
-init_reg_size_table (void)
-{
- __builtin_init_dwarf_reg_size_table (dwarf_reg_size_table);
- dwarf_reg_size_table_initialized = 1;
-}
-#endif
-
-#if __GTHREADS
-static void
-eh_threads_initialize (void)
-{
- /* Try to create the key. If it fails, revert to static method,
- otherwise start using thread specific EH contexts. */
- if (__gthread_key_create (&eh_context_key, &eh_context_free) == 0)
- get_eh_context = &eh_context_specific;
- else
- get_eh_context = &eh_context_static;
-}
-#endif /* no __GTHREADS */
-
-/* Initialize EH context.
- This will be called only once, since we change GET_EH_CONTEXT
- pointer to another routine. */
-
-static struct eh_context *
-eh_context_initialize (void)
-{
-#if __GTHREADS
-
- static __gthread_once_t once = __GTHREAD_ONCE_INIT;
- /* Make sure that get_eh_context does not point to us anymore.
- Some systems have dummy thread routines in their libc that
- return a success (Solaris 2.6 for example). */
- if (__gthread_once (&once, eh_threads_initialize) != 0
- || get_eh_context == &eh_context_initialize)
- {
- /* Use static version of EH context. */
- get_eh_context = &eh_context_static;
- }
-#ifdef DWARF2_UNWIND_INFO
- {
- static __gthread_once_t once_regsizes = __GTHREAD_ONCE_INIT;
- if (__gthread_once (&once_regsizes, init_reg_size_table) != 0
- || ! dwarf_reg_size_table_initialized)
- init_reg_size_table ();
- }
-#endif
-
-#else /* no __GTHREADS */
-
- /* Use static version of EH context. */
- get_eh_context = &eh_context_static;
-
-#ifdef DWARF2_UNWIND_INFO
- init_reg_size_table ();
-#endif
-
-#endif /* no __GTHREADS */
-
- return (*get_eh_context) ();
-}
-
-/* Return a static EH context. */
-
-static struct eh_context *
-eh_context_static (void)
-{
- static struct eh_context eh;
- static int initialized;
- static void *top_elt[2];
-
- if (! initialized)
- {
- initialized = 1;
- memset (&eh, 0, sizeof eh);
- eh.dynamic_handler_chain = top_elt;
- }
- return &eh;
-}
-
-#if __GTHREADS
-/* Return a thread specific EH context. */
-
-static struct eh_context *
-eh_context_specific (void)
-{
- struct eh_context *eh;
- eh = (struct eh_context *) __gthread_getspecific (eh_context_key);
- if (! eh)
- {
- eh = new_eh_context ();
- if (__gthread_setspecific (eh_context_key, (void *) eh) != 0)
- __terminate ();
- }
-
- return eh;
-}
-#endif __GTHREADS
-\f
-/* Support routines for setjmp/longjmp exception handling. */
-
-/* Calls to __sjthrow are generated by the compiler when an exception
- is raised when using the setjmp/longjmp exception handling codegen
- method. */
-
-#ifdef DONT_USE_BUILTIN_SETJMP
-extern void longjmp (void *, int);
-#endif
-
-/* Routine to get the head of the current thread's dynamic handler chain
- use for exception handling. */
-
-void ***
-__get_dynamic_handler_chain (void)
-{
- struct eh_context *eh = (*get_eh_context) ();
- return &eh->dynamic_handler_chain;
-}
-
-/* This is used to throw an exception when the setjmp/longjmp codegen
- method is used for exception handling.
-
- We call __terminate if there are no handlers left. Otherwise we run the
- cleanup actions off the dynamic cleanup stack, and pop the top of the
- dynamic handler chain, and use longjmp to transfer back to the associated
- handler. */
-
-void
-__sjthrow (void)
-{
- struct eh_context *eh = (*get_eh_context) ();
- void ***dhc = &eh->dynamic_handler_chain;
- void *jmpbuf;
- void (*func)(void *, int);
- void *arg;
- /* The cleanup chain is one word into the buffer. Get the cleanup chain. */
- void ***cleanup = (void***)&(*dhc)[1];
-
- /* If there are any cleanups in the chain, run them now. */
- if (cleanup[0])
- {
- double store[200];
- void **buf = (void**)store;
- buf[1] = 0;
- buf[0] = (*dhc);
-
- /* try { */
-#ifdef DONT_USE_BUILTIN_SETJMP
- if (! setjmp (&buf[2]))
-#else
- if (! __builtin_setjmp (&buf[2]))
-#endif
- {
- *dhc = buf;
- while (cleanup[0])
- {
- func = (void(*)(void*, int))cleanup[0][1];
- arg = (void*)cleanup[0][2];
-
- /* Update this before running the cleanup. */
- cleanup[0] = (void **)cleanup[0][0];
-
- (*func)(arg, 2);
- }
- *dhc = buf[0];
- }
- /* catch (...) */
- else
- {
- __terminate ();
- }
- }
-
- /* We must call terminate if we try and rethrow an exception, when
- there is no exception currently active and when there are no
- handlers left. */
- if (! eh->info || (*dhc)[0] == 0)
- __terminate ();
-
- /* Find the jmpbuf associated with the top element of the dynamic
- handler chain. The jumpbuf starts two words into the buffer. */
- jmpbuf = &(*dhc)[2];
-
- /* Then we pop the top element off the dynamic handler chain. */
- *dhc = (void**)(*dhc)[0];
-
- /* And then we jump to the handler. */
-
-#ifdef DONT_USE_BUILTIN_SETJMP
- longjmp (jmpbuf, 1);
-#else
- __builtin_longjmp (jmpbuf, 1);
-#endif
-}
-
-/* Run cleanups on the dynamic cleanup stack for the current dynamic
- handler, then pop the handler off the dynamic handler stack, and
- then throw. This is used to skip the first handler, and transfer
- control to the next handler in the dynamic handler stack. */
-
-void
-__sjpopnthrow (void)
-{
- struct eh_context *eh = (*get_eh_context) ();
- void ***dhc = &eh->dynamic_handler_chain;
- void (*func)(void *, int);
- void *arg;
- /* The cleanup chain is one word into the buffer. Get the cleanup chain. */
- void ***cleanup = (void***)&(*dhc)[1];
-
- /* If there are any cleanups in the chain, run them now. */
- if (cleanup[0])
- {
- double store[200];
- void **buf = (void**)store;
- buf[1] = 0;
- buf[0] = (*dhc);
-
- /* try { */
-#ifdef DONT_USE_BUILTIN_SETJMP
- if (! setjmp (&buf[2]))
-#else
- if (! __builtin_setjmp (&buf[2]))
-#endif
- {
- *dhc = buf;
- while (cleanup[0])
- {
- func = (void(*)(void*, int))cleanup[0][1];
- arg = (void*)cleanup[0][2];
-
- /* Update this before running the cleanup. */
- cleanup[0] = (void **)cleanup[0][0];
-
- (*func)(arg, 2);
- }
- *dhc = buf[0];
- }
- /* catch (...) */
- else
- {
- __terminate ();
- }
- }
-
- /* Then we pop the top element off the dynamic handler chain. */
- *dhc = (void**)(*dhc)[0];
-
- __sjthrow ();
-}
-\f
-/* Support code for all exception region-based exception handling. */
-
-int
-__eh_rtime_match (void *rtime)
-{
- void *info;
- __eh_matcher matcher;
- void *ret;
-
- info = *(__get_eh_info ());
- matcher = ((__eh_info *)info)->match_function;
- if (! matcher)
- {
-#ifndef inhibit_libc
- fprintf (stderr, "Internal Compiler Bug: No runtime type matcher.");
-#endif
- return 0;
- }
- ret = (*matcher) (info, rtime, (void *)0);
- return (ret != NULL);
-}
-
-/* This value identifies the place from which an exception is being
- thrown. */
-
-#ifdef EH_TABLE_LOOKUP
-
-EH_TABLE_LOOKUP
-
-#else
-
-#ifdef DWARF2_UNWIND_INFO
-
-/* Return the table version of an exception descriptor */
-
-short
-__get_eh_table_version (exception_descriptor *table)
-{
- return table->lang.version;
-}
-
-/* Return the originating table language of an exception descriptor */
-
-short
-__get_eh_table_language (exception_descriptor *table)
-{
- return table->lang.language;
-}
-
-/* This routine takes a PC and a pointer to the exception region TABLE for
- its translation unit, and returns the address of the exception handler
- associated with the closest exception table handler entry associated
- with that PC, or 0 if there are no table entries the PC fits in.
-
- In the advent of a tie, we have to give the last entry, as it represents
- an inner block. */
-
-static void *
-old_find_exception_handler (void *pc, old_exception_table *table)
-{
- if (table)
- {
- int pos;
- int best = -1;
-
- /* We can't do a binary search because the table isn't guaranteed
- to be sorted from function to function. */
- for (pos = 0; table[pos].start_region != (void *) -1; ++pos)
- {
- if (table[pos].start_region <= pc && table[pos].end_region > pc)
- {
- /* This can apply. Make sure it is at least as small as
- the previous best. */
- if (best == -1 || (table[pos].end_region <= table[best].end_region
- && table[pos].start_region >= table[best].start_region))
- best = pos;
- }
- /* But it is sorted by starting PC within a function. */
- else if (best >= 0 && table[pos].start_region > pc)
- break;
- }
- if (best != -1)
- return table[best].exception_handler;
- }
-
- return (void *) 0;
-}
-
-/* find_exception_handler finds the correct handler, if there is one, to
- handle an exception.
- returns a pointer to the handler which controlled should be transferred
- to, or NULL if there is nothing left.
- Parameters:
- PC - pc where the exception originates. If this is a rethrow,
- then this starts out as a pointer to the exception table
- entry we wish to rethrow out of.
- TABLE - exception table for the current module.
- EH_INFO - eh info pointer for this exception.
- RETHROW - 1 if this is a rethrow. (see incoming value of PC).
- CLEANUP - returned flag indicating whether this is a cleanup handler.
-*/
-static void *
-find_exception_handler (void *pc, exception_descriptor *table,
- __eh_info *eh_info, int rethrow, int *cleanup)
-{
-
- void *retval = NULL;
- *cleanup = 1;
- if (table)
- {
- int pos = 0;
- /* The new model assumed the table is sorted inner-most out so the
- first region we find which matches is the correct one */
-
- exception_table *tab = &(table->table[0]);
-
- /* Subtract 1 from the PC to avoid hitting the next region */
- if (rethrow)
- {
- /* pc is actually the region table entry to rethrow out of */
- pos = ((exception_table *) pc) - tab;
- pc = ((exception_table *) pc)->end_region - 1;
-
- /* The label is always on the LAST handler entry for a region,
- so we know the next entry is a different region, even if the
- addresses are the same. Make sure its not end of table tho. */
- if (tab[pos].start_region != (void *) -1)
- pos++;
- }
- else
- pc--;
-
- /* We can't do a binary search because the table is in inner-most
- to outermost address ranges within functions */
- for ( ; tab[pos].start_region != (void *) -1; pos++)
- {
- if (tab[pos].start_region <= pc && tab[pos].end_region > pc)
- {
- if (tab[pos].match_info)
- {
- __eh_matcher matcher = eh_info->match_function;
- /* match info but no matcher is NOT a match */
- if (matcher)
- {
- void *ret = (*matcher)((void *) eh_info,
- tab[pos].match_info, table);
- if (ret)
- {
- if (retval == NULL)
- retval = tab[pos].exception_handler;
- *cleanup = 0;
- break;
- }
- }
- }
- else
- {
- if (retval == NULL)
- retval = tab[pos].exception_handler;
- }
- }
- }
- }
- return retval;
-}
-#endif /* DWARF2_UNWIND_INFO */
-#endif /* EH_TABLE_LOOKUP */
-\f
-#ifdef DWARF2_UNWIND_INFO
-/* Support code for exception handling using static unwind information. */
-
-#include "frame.h"
-
-/* This type is used in get_reg and put_reg to deal with ABIs where a void*
- is smaller than a word, such as the Irix 6 n32 ABI. We cast twice to
- avoid a warning about casting between int and pointer of different
- sizes. */
-
-typedef int ptr_type __attribute__ ((mode (pointer)));
-
-#ifdef INCOMING_REGNO
-/* Is the saved value for register REG in frame UDATA stored in a register
- window in the previous frame? */
-
-/* ??? The Sparc INCOMING_REGNO references TARGET_FLAT. This allows us
- to use the macro here. One wonders, though, that perhaps TARGET_FLAT
- compiled functions won't work with the frame-unwind stuff here.
- Perhaps the entireity of in_reg_window should be conditional on having
- seen a DW_CFA_GNU_window_save? */
-#define target_flags 0
-
-static int
-in_reg_window (int reg, frame_state *udata)
-{
- if (udata->saved[reg] == REG_SAVED_REG)
- return INCOMING_REGNO (reg) == reg;
- if (udata->saved[reg] != REG_SAVED_OFFSET)
- return 0;
-
-#ifdef STACK_GROWS_DOWNWARD
- return udata->reg_or_offset[reg] > 0;
-#else
- return udata->reg_or_offset[reg] < 0;
-#endif
-}
-#else
-static inline int
-in_reg_window (int reg __attribute__ ((__unused__)),
- frame_state *udata __attribute__ ((__unused__)))
-{
- return 0;
-}
-#endif /* INCOMING_REGNO */
-
-/* Get the address of register REG as saved in UDATA, where SUB_UDATA is a
- frame called by UDATA or 0. */
-
-static word_type *
-get_reg_addr (unsigned reg, frame_state *udata, frame_state *sub_udata)
-{
- while (udata->saved[reg] == REG_SAVED_REG)
- {
- reg = udata->reg_or_offset[reg];
- if (in_reg_window (reg, udata))
- {
- udata = sub_udata;
- sub_udata = NULL;
- }
- }
- if (udata->saved[reg] == REG_SAVED_OFFSET)
- return (word_type *)(udata->cfa + udata->reg_or_offset[reg]);
- else
- abort ();
-}
-
-/* Get the value of register REG as saved in UDATA, where SUB_UDATA is a
- frame called by UDATA or 0. */
-
-static inline void *
-get_reg (unsigned reg, frame_state *udata, frame_state *sub_udata)
-{
- return (void *)(ptr_type) *get_reg_addr (reg, udata, sub_udata);
-}
-
-/* Overwrite the saved value for register REG in frame UDATA with VAL. */
-
-static inline void
-put_reg (unsigned reg, void *val, frame_state *udata)
-{
- *get_reg_addr (reg, udata, NULL) = (word_type)(ptr_type) val;
-}
-
-/* Copy the saved value for register REG from frame UDATA to frame
- TARGET_UDATA. Unlike the previous two functions, this can handle
- registers that are not one word large. */
-
-static void
-copy_reg (unsigned reg, frame_state *udata, frame_state *target_udata)
-{
- word_type *preg = get_reg_addr (reg, udata, NULL);
- word_type *ptreg = get_reg_addr (reg, target_udata, NULL);
-
- memcpy (ptreg, preg, dwarf_reg_size_table [reg]);
-}
-
-/* Retrieve the return address for frame UDATA. */
-
-static inline void *
-get_return_addr (frame_state *udata, frame_state *sub_udata)
-{
- return __builtin_extract_return_addr
- (get_reg (udata->retaddr_column, udata, sub_udata));
-}
-
-/* Overwrite the return address for frame UDATA with VAL. */
-
-static inline void
-put_return_addr (void *val, frame_state *udata)
-{
- val = __builtin_frob_return_addr (val);
- put_reg (udata->retaddr_column, val, udata);
-}
-
-/* Given the current frame UDATA and its return address PC, return the
- information about the calling frame in CALLER_UDATA. */
-
-static void *
-next_stack_level (void *pc, frame_state *udata, frame_state *caller_udata)
-{
- caller_udata = __frame_state_for (pc, caller_udata);
- if (! caller_udata)
- return 0;
-
- /* Now go back to our caller's stack frame. If our caller's CFA register
- was saved in our stack frame, restore it; otherwise, assume the CFA
- register is SP and restore it to our CFA value. */
- if (udata->saved[caller_udata->cfa_reg])
- caller_udata->cfa = get_reg (caller_udata->cfa_reg, udata, 0);
- else
- caller_udata->cfa = udata->cfa;
- caller_udata->cfa += caller_udata->cfa_offset;
-
- return caller_udata;
-}
-
-/* Hook to call before __terminate if only cleanup handlers remain. */
-void
-__unwinding_cleanup (void)
-{
-}
-
-/* throw_helper performs some of the common grunt work for a throw. This
- routine is called by throw and rethrows. This is pretty much split
- out from the old __throw routine. An addition has been added which allows
- for a dummy call to a routine __unwinding_cleanup() when there are nothing
- but cleanups remaining. This allows a debugger to examine the state
- at which the throw was executed, before any cleanups, rather than
- at the terminate point after the stack has been unwound.
-
- EH is the current eh_context structure.
- PC is the address of the call to __throw.
- MY_UDATA is the unwind information for __throw.
- OFFSET_P is where we return the SP adjustment offset. */
-
-static void *
-throw_helper (struct eh_context *eh, void *pc, frame_state *my_udata,
- long *offset_p)
-{
- frame_state ustruct2, *udata = &ustruct2;
- frame_state ustruct;
- frame_state *sub_udata = &ustruct;
- void *saved_pc = pc;
- void *handler;
- void *handler_p = 0;
- void *pc_p = 0;
- frame_state saved_ustruct;
- int new_eh_model;
- int cleanup = 0;
- int only_cleanup = 0;
- int rethrow = 0;
- int saved_state = 0;
- long args_size;
- __eh_info *eh_info = (__eh_info *)eh->info;
-
- /* Do we find a handler based on a re-throw PC? */
- if (eh->table_index != (void *) 0)
- rethrow = 1;
-
- memcpy (udata, my_udata, sizeof (*udata));
-
- handler = (void *) 0;
- for (;;)
- {
- frame_state *p = udata;
- udata = next_stack_level (pc, udata, sub_udata);
- sub_udata = p;
-
- /* If we couldn't find the next frame, we lose. */
- if (! udata)
- break;
-
- if (udata->eh_ptr == NULL)
- new_eh_model = 0;
- else
- new_eh_model = (((exception_descriptor *)(udata->eh_ptr))->
- runtime_id_field == NEW_EH_RUNTIME);
-
- if (rethrow)
- {
- rethrow = 0;
- handler = find_exception_handler (eh->table_index, udata->eh_ptr,
- eh_info, 1, &cleanup);
- eh->table_index = (void *)0;
- }
- else
- if (new_eh_model)
- handler = find_exception_handler (pc, udata->eh_ptr, eh_info,
- 0, &cleanup);
- else
- handler = old_find_exception_handler (pc, udata->eh_ptr);
-
- /* If we found one, we can stop searching, if its not a cleanup.
- for cleanups, we save the state, and keep looking. This allows
- us to call a debug hook if there are nothing but cleanups left. */
- if (handler)
- {
- if (cleanup)
- {
- if (!saved_state)
- {
- saved_ustruct = *udata;
- handler_p = handler;
- pc_p = pc;
- saved_state = 1;
- only_cleanup = 1;
- }
- }
- else
- {
- only_cleanup = 0;
- break;
- }
- }
-
- /* Otherwise, we continue searching. We subtract 1 from PC to avoid
- hitting the beginning of the next region. */
- pc = get_return_addr (udata, sub_udata) - 1;
- }
-
- if (saved_state)
- {
- udata = &saved_ustruct;
- handler = handler_p;
- pc = pc_p;
- if (only_cleanup)
- __unwinding_cleanup ();
- }
-
- /* If we haven't found a handler by now, this is an unhandled
- exception. */
- if (! handler)
- __terminate();
-
- eh->handler_label = handler;
-
- args_size = udata->args_size;
-
- if (pc == saved_pc)
- /* We found a handler in the throw context, no need to unwind. */
- udata = my_udata;
- else
- {
- int i;
-
- /* Unwind all the frames between this one and the handler by copying
- their saved register values into our register save slots. */
-
- /* Remember the PC where we found the handler. */
- void *handler_pc = pc;
-
- /* Start from the throw context again. */
- pc = saved_pc;
- memcpy (udata, my_udata, sizeof (*udata));
-
- while (pc != handler_pc)
- {
- frame_state *p = udata;
- udata = next_stack_level (pc, udata, sub_udata);
- sub_udata = p;
-
- for (i = 0; i < DWARF_FRAME_REGISTERS; ++i)
- if (i != udata->retaddr_column && udata->saved[i])
- {
- /* If you modify the saved value of the return address
- register on the SPARC, you modify the return address for
- your caller's frame. Don't do that here, as it will
- confuse get_return_addr. */
- if (in_reg_window (i, udata)
- && udata->saved[udata->retaddr_column] == REG_SAVED_REG
- && udata->reg_or_offset[udata->retaddr_column] == i)
- continue;
- copy_reg (i, udata, my_udata);
- }
-
- pc = get_return_addr (udata, sub_udata) - 1;
- }
-
- /* But we do need to update the saved return address register from
- the last frame we unwind, or the handler frame will have the wrong
- return address. */
- if (udata->saved[udata->retaddr_column] == REG_SAVED_REG)
- {
- i = udata->reg_or_offset[udata->retaddr_column];
- if (in_reg_window (i, udata))
- copy_reg (i, udata, my_udata);
- }
- }
- /* udata now refers to the frame called by the handler frame. */
-
- /* We adjust SP by the difference between __throw's CFA and the CFA for
- the frame called by the handler frame, because those CFAs correspond
- to the SP values at the two call sites. We need to further adjust by
- the args_size of the handler frame itself to get the handler frame's
- SP from before the args were pushed for that call. */
-#ifdef STACK_GROWS_DOWNWARD
- *offset_p = udata->cfa - my_udata->cfa + args_size;
-#else
- *offset_p = my_udata->cfa - udata->cfa - args_size;
-#endif
-
- return handler;
-}
-
-
-/* We first search for an exception handler, and if we don't find
- it, we call __terminate on the current stack frame so that we may
- use the debugger to walk the stack and understand why no handler
- was found.
-
- If we find one, then we unwind the frames down to the one that
- has the handler and transfer control into the handler. */
-
-/*extern void __throw(void) __attribute__ ((__noreturn__));*/
-
-void
-__throw (void)
-{
- struct eh_context *eh = (*get_eh_context) ();
- void *pc, *handler;
- long offset;
-
- /* XXX maybe make my_ustruct static so we don't have to look it up for
- each throw. */
- frame_state my_ustruct, *my_udata = &my_ustruct;
-
- /* This is required for C++ semantics. We must call terminate if we
- try and rethrow an exception, when there is no exception currently
- active. */
- if (! eh->info)
- __terminate ();
-
- /* Start at our stack frame. */
-label:
- my_udata = __frame_state_for (&&label, my_udata);
- if (! my_udata)
- __terminate ();
-
- /* We need to get the value from the CFA register. */
- my_udata->cfa = __builtin_dwarf_cfa ();
-
- /* Do any necessary initialization to access arbitrary stack frames.
- On the SPARC, this means flushing the register windows. */
- __builtin_unwind_init ();
-
- /* Now reset pc to the right throw point. */
- pc = __builtin_extract_return_addr (__builtin_return_address (0)) - 1;
-
- handler = throw_helper (eh, pc, my_udata, &offset);
-
- /* Now go! */
-
- __builtin_eh_return ((void *)eh, offset, handler);
-
- /* Epilogue: restore the handler frame's register values and return
- to the stub. */
-}
-
-/*extern void __rethrow(void *) __attribute__ ((__noreturn__));*/
-
-void
-__rethrow (void *index)
-{
- struct eh_context *eh = (*get_eh_context) ();
- void *pc, *handler;
- long offset;
-
- /* XXX maybe make my_ustruct static so we don't have to look it up for
- each throw. */
- frame_state my_ustruct, *my_udata = &my_ustruct;
-
- /* This is required for C++ semantics. We must call terminate if we
- try and rethrow an exception, when there is no exception currently
- active. */
- if (! eh->info)
- __terminate ();
-
- /* This is the table index we want to rethrow from. The value of
- the END_REGION label is used for the PC of the throw, and the
- search begins with the next table entry. */
- eh->table_index = index;
-
- /* Start at our stack frame. */
-label:
- my_udata = __frame_state_for (&&label, my_udata);
- if (! my_udata)
- __terminate ();
-
- /* We need to get the value from the CFA register. */
- my_udata->cfa = __builtin_dwarf_cfa ();
-
- /* Do any necessary initialization to access arbitrary stack frames.
- On the SPARC, this means flushing the register windows. */
- __builtin_unwind_init ();
-
- /* Now reset pc to the right throw point. */
- pc = __builtin_extract_return_addr (__builtin_return_address (0)) - 1;
-
- handler = throw_helper (eh, pc, my_udata, &offset);
-
- /* Now go! */
-
- __builtin_eh_return ((void *)eh, offset, handler);
-
- /* Epilogue: restore the handler frame's register values and return
- to the stub. */
-}
-#endif /* DWARF2_UNWIND_INFO */
-
-#endif /* L_eh */
-\f
-#ifdef L_pure
-#ifndef inhibit_libc
-/* This gets us __GNU_LIBRARY__. */
-#undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */
-#include <stdio.h>
-
-#ifdef __GNU_LIBRARY__
- /* Avoid forcing the library's meaning of `write' on the user program
- by using the "internal" name (for use within the library) */
-#define write(fd, buf, n) __write((fd), (buf), (n))
-#endif
-#endif /* inhibit_libc */
-
-#define MESSAGE "pure virtual method called\n"
-
-void
-__pure_virtual (void)
-{
-#ifndef inhibit_libc
- write (2, MESSAGE, sizeof (MESSAGE) - 1);
-#endif
- __terminate ();
-}
-#endif
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