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Import the latest version ehopt.c from the Cygnus Sourceware anoncvs

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repository (dated 5-3-1999).

This fixes the endless loop the assembler gets in when it is trying to
decide how big part of the exception handling table should be on the Alpha.
This version of this file allows qradiobutton.cpp from qt and widget.cc
from kdelibs11 to be compilable.
This commit is contained in:
David E. O'Brien 2000-02-02 03:10:44 +00:00
parent 2bc4294122
commit 0b91470ee9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/vendor/binutils/dist/; revision=56944
1 changed files with 37 additions and 2 deletions
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39
contrib/binutils/gas/ehopt.c
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@ -261,17 +261,52 @@ check_eh_frame (exp, pnbytes)
expressionS *exp;
unsigned int *pnbytes;
{
static int saw_size;
static symbolS *size_end_sym;
static int saw_advance_loc4;
static fragS *loc4_frag;
static int loc4_fix;
if (saw_size
&& S_IS_DEFINED (size_end_sym))
{
/* We have come to the end of the CIE or FDE. See below where
we set saw_size. We must check this first because we may now
be looking at the next size. */
saw_size = 0;
saw_advance_loc4 = 0;
}
if (flag_traditional_format)
{
/* Don't optimize. */
}
else if (strcmp (segment_name (now_seg), ".eh_frame") != 0)
saw_advance_loc4 = 0;
else if (*pnbytes == 1
{
saw_size = 0;
saw_advance_loc4 = 0;
}
else if (! saw_size
&& *pnbytes == 4)
{
/* This might be the size of the CIE or FDE. We want to know
the size so that we don't accidentally optimize across an FDE
boundary. We recognize the size in one of two forms: a
symbol which will later be defined as a difference, or a
subtraction of two symbols. Either way, we can tell when we
are at the end of the FDE because the symbol becomes defined
(in the case of a subtraction, the end symbol, from which the
start symbol is being subtracted). Other ways of describing
the size will not be optimized. */
if ((exp->X_op == O_symbol || exp->X_op == O_subtract)
&& ! S_IS_DEFINED (exp->X_add_symbol))
{
saw_size = 1;
size_end_sym = exp->X_add_symbol;
}
}
else if (saw_size
&& *pnbytes == 1
&& exp->X_op == O_constant
&& exp->X_add_number == DW_CFA_advance_loc4)
{