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Diffstat (limited to 'gdb/doc/gdbint.texinfo')
| -rw-r--r-- | gdb/doc/gdbint.texinfo | 50 |
1 files changed, 3 insertions, 47 deletions
diff --git a/gdb/doc/gdbint.texinfo b/gdb/doc/gdbint.texinfo index c8053c0..9ce6ecb 100644 --- a/gdb/doc/gdbint.texinfo +++ b/gdb/doc/gdbint.texinfo @@ -8,7 +8,7 @@ @ifinfo This file documents the internals of the GNU debugger @value{GDBN}. -Copyright 1990,1991,1992,1993,1994,1996,1998,1999,2000,2001,2002 +Copyright 1990,1991,1992,1993,1994,1996,1998,1999,2000,2001,2002,2003 Free Software Foundation, Inc. Contributed by Cygnus Solutions. Written by John Gilmore. Second Edition by Stan Shebs. @@ -50,8 +50,8 @@ Software Foundation raise funds for GNU development.'' @end tex @vskip 0pt plus 1filll -Copyright @copyright{} 1990,1991,1992,1993,1994,1996,1998,1999,2000,2001, 2002 - Free Software Foundation, Inc. +Copyright @copyright{} 1990,1991,1992,1993,1994,1996,1998,1999,2000,2001, + 2002, 2003 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or @@ -3144,50 +3144,6 @@ and to cancel any deferred stores. Currently only implemented correctly for native Sparc configurations? -@item COERCE_FLOAT_TO_DOUBLE (@var{formal}, @var{actual}) -@findex COERCE_FLOAT_TO_DOUBLE -@cindex promotion to @code{double} -@cindex @code{float} arguments -@cindex prototyped functions, passing arguments to -@cindex passing arguments to prototyped functions -Return non-zero if GDB should promote @code{float} values to -@code{double} when calling a non-prototyped function. The argument -@var{actual} is the type of the value we want to pass to the function. -The argument @var{formal} is the type of this argument, as it appears in -the function's definition. Note that @var{formal} may be zero if we -have no debugging information for the function, or if we're passing more -arguments than are officially declared (for example, varargs). This -macro is never invoked if the function definitely has a prototype. - -How you should pass arguments to a function depends on whether it was -defined in K&R style or prototype style. If you define a function using -the K&R syntax that takes a @code{float} argument, then callers must -pass that argument as a @code{double}. If you define the function using -the prototype syntax, then you must pass the argument as a @code{float}, -with no promotion. - -Unfortunately, on certain older platforms, the debug info doesn't -indicate reliably how each function was defined. A function type's -@code{TYPE_FLAG_PROTOTYPED} flag may be unset, even if the function was -defined in prototype style. When calling a function whose -@code{TYPE_FLAG_PROTOTYPED} flag is unset, GDB consults the -@code{COERCE_FLOAT_TO_DOUBLE} macro to decide what to do. - -@findex standard_coerce_float_to_double -For modern targets, it is proper to assume that, if the prototype flag -is unset, that can be trusted: @code{float} arguments should be promoted -to @code{double}. You should use the function -@code{standard_coerce_float_to_double} to get this behavior. - -@findex default_coerce_float_to_double -For some older targets, if the prototype flag is unset, that doesn't -tell us anything. So we guess that, if we don't have a type for the -formal parameter (@i{i.e.}, the first argument to -@code{COERCE_FLOAT_TO_DOUBLE} is null), then we should promote it; -otherwise, we should leave it alone. The function -@code{default_coerce_float_to_double} provides this behavior; it is the -default value, for compatibility with older configurations. - @item int CONVERT_REGISTER_P(@var{regnum}) @findex CONVERT_REGISTER_P Return non-zero if register @var{regnum} can represent data values in a |