@ifinfo
This document describes the stabs debugging symbol tables.
-Copyright 1992, 93, 94, 95, 97, 1998 Free Software Foundation, Inc.
+Copyright 1992,1993,1994,1995,1997,1998,2000,2001
+ Free Software Foundation, Inc.
Contributed by Cygnus Support. Written by Julia Menapace, Jim Kingdon,
and David MacKenzie.
-Permission is granted to make and distribute verbatim copies of
-this manual provided the copyright notice and this permission notice
-are preserved on all copies.
-
-@ignore
-Permission is granted to process this file through Tex and print the
-results, provided the printed document carries copying permission
-notice identical to this one except for the removal of this paragraph
-(this paragraph not being relevant to the printed manual).
-
-@end ignore
-Permission is granted to copy or distribute modified versions of this
-manual under the terms of the GPL (for which purpose this text may be
-regarded as a program in the language TeX).
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.1 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts. A copy of the license is included in the section entitled ``GNU
+Free Documentation License''.
@end ifinfo
@setchapternewpage odd
@end tex
@vskip 0pt plus 1filll
-Copyright @copyright{} 1992, 93, 94, 95, 97, 1998 Free Software Foundation, Inc.
+Copyright @copyright{} 1992,1993,1994,1995,1997,1998,2000,2001 Free Software Foundation, Inc.
Contributed by Cygnus Support.
-Permission is granted to make and distribute verbatim copies of
-this manual provided the copyright notice and this permission notice
-are preserved on all copies.
-
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.1 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts. A copy of the license is included in the section entitled ``GNU
+Free Documentation License''.
@end titlepage
@ifinfo
* Stab Sections:: In some object file formats, stabs are
in sections.
* Symbol Types Index:: Index of symbolic stab symbol type names.
+* GNU Free Documentation License:: The license for this documentation
@end menu
@end ifinfo
or a bitstring instead of a set. It doesn't change the layout of the
data being represented, but does enable the debugger to know which type
it is.
+
+@item V
+Indicate that this type is a vector instead of an array. The only
+major difference between vectors and arrays is that vectors are
+passed by value instead of by reference (vector coprocessor extension).
+
@end table
All of this can make the string field quite long. All versions of GDB,
Following the @samp{s} type descriptor is the number of bytes the
structure occupies, followed by a description of each structure element.
-The structure element descriptions are of the form @var{name:type, bit
-offset from the start of the struct, number of bits in the element}.
+The structure element descriptions are of the form
+@samp{@var{name}:@var{type}, @var{bit offset from the start of the
+struct}, @var{number of bits in the element}}.
@c FIXME: phony line break. Can probably be fixed by using an example
@c with fewer fields.
descriptor @samp{u}, following the @samp{23=} of the type definition,
narrows it down to a union type definition. Following the @samp{u} is
the number of bytes in the union. After that is a list of union element
-descriptions. Their format is @var{name:type, bit offset into the
-union, number of bytes for the element;}.
+descriptions. Their format is @samp{@var{name}:@var{type}, @var{bit
+offset into the union}, @var{number of bytes for the element};}.
The stab for the union variable is:
@node Member Type Descriptor
@section The @samp{@@} Type Descriptor
-The @samp{@@} type descriptor is for a member (class and variable) type.
-It is followed by type information for the offset basetype, a comma, and
-type information for the type of the field being pointed to. (FIXME:
-this is acknowledged to be gibberish. Can anyone say what really goes
-here?).
+The @samp{@@} type descriptor is used together with the @samp{*} type
+descriptor for a pointer-to-non-static-member-data type. It is followed
+by type information for the class (or union), a comma, and type
+information for the member data.
+
+The following C++ source:
+
+@smallexample
+typedef int A::*int_in_a;
+@end smallexample
+
+generates the following stab:
+
+@smallexample
+.stabs "int_in_a:t20=*21=@@19,1",128,0,0,0
+@end smallexample
Note that there is a conflict between this and type attributes
(@pxref{String Field}); both use type descriptor @samp{@@}.
solves the problem of having to associate the ELF and stab symbols.
However, no one has yet designed or implemented such a scheme.
+@include fdl.texi
+
@node Symbol Types Index
@unnumbered Symbol Types Index
projects / deliverable / binutils-gdb.git / blobdiff