* doc/as.texinfo: Added section on reporting bugs.

1 files changed, 236 insertions, 1 deletions

diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo
index 6b3a75b..e9d1c87 100644
--- a/gas/doc/as.texinfo
+++ b/gas/doc/as.texinfo
@@ -170,6 +170,7 @@ code for @value{TARGET} architectures.
 * Expressions::                 Expressions
 * Pseudo Ops::                  Assembler Directives
 * Machine Dependencies::        Machine Dependent Features
+* Reporting Bugs::              Reporting Bugs
 * Acknowledgements::            Who Did What
 * Index::                       Index
 @end menu
@@ -206,6 +207,12 @@ Here is a brief summary of how to invoke @code{@value{AS}}.  For details,
  [ -mbig-endian | -mlittle-endian ]
 @end ifset
 @c end-sanitize-arc
+@c start-sanitize-d10v
+@ifset D10V
+ [ -O ]
+@end ifset
+@c end-sanitize-d10v
+
 @ifset H8
 @c Hitachi family chips have no machine-dependent assembler options
 @end ifset
@@ -352,6 +359,19 @@ Generate ``little endian'' format output.
 @end table
 @end ifset
 
+@c start-sanitize-d10v
+@ifset D10V
+The following options are available when @value{AS} is configured for
+a D10V processor.
+@table @code
+@cindex D10V optimization
+@cindex optimization, D10V
+@item -O
+Optimize output by parallelizing instructions.
+@end table
+@end ifset
+@c end-sanitize-d10v
+
 @ifset I960
 The following options are available when @value{AS} is configured for the
 Intel 80960 processor.
@@ -3002,7 +3022,9 @@ storage boundary.  The first expression (which must be absolute) is the
 alignment required, as described below.
 The second expression (also absolute) gives the value to be stored in
 the padding bytes.  It (and the comma) may be omitted.  If it is
-omitted, the padding bytes are zero.
+omitted, the padding bytes are zero.  
+For the alpha, if the section is marked as containing code and the
+padding expression is omitted, then the space is filled with no-ops.
 
 The way the required alignment is specified varies from system to system.
 For the a29k, hppa, m68k, m88k, w65, sparc, and Hitachi SH, and i386 using ELF
@@ -4353,6 +4375,11 @@ subject, see the hardware manufacturer's manual.
 * ARC-Dependent::               ARC Dependent Features
 @end ifset
 @c end-sanitize-arc
+@c start-sanitize-d10v
+@ifset D10V
+* D10V-Dependent::              D10V Dependent Features
+@end ifset
+@c end-sanitize-d10v
 @ifset H8/300
 * H8/300-Dependent::            Hitachi H8/300 Dependent Features
 @end ifset
@@ -4499,6 +4526,12 @@ family.
 @end ifclear
 @end ifset
 
+@c start-sanitize-d10v
+@ifset D10V
+@include c-d10v.texi
+@end ifset
+@c end-sanitize-d10v
+
 @ifset H8/300
 @include c-h8300.texi
 @end ifset
@@ -4552,6 +4585,208 @@ family.
 @raisesections
 @end ifset
 
+@node Reporting Bugs
+@chapter Reporting Bugs
+@cindex bugs in @code{@value{AS}}
+@cindex reporting bugs in @code{@value{AS}}
+
+Your bug reports play an essential role in making @code{@value{AS}} reliable.
+
+Reporting a bug may help you by bringing a solution to your problem, or it may
+not.  But in any case the principal function of a bug report is to help the
+entire community by making the next version of @code{@value{AS}} work better.
+Bug reports are your contribution to the maintenance of @code{@value{AS}}.
+
+In order for a bug report to serve its purpose, you must include the
+information that enables us to fix the bug.
+
+@menu
+* Bug Criteria::                Have you found a bug?
+* Bug Reporting::               How to report bugs
+@end menu
+
+@node Bug Criteria
+@section Have you found a bug?
+@cindex bug criteria
+
+If you are not sure whether you have found a bug, here are some guidelines:
+
+@itemize @bullet
+@cindex fatal signal
+@cindex assembler crash
+@cindex crash of assembler
+@item
+If the assembler gets a fatal signal, for any input whatever, that is a
+@code{@value{AS}} bug.  Reliable assemblers never crash.
+
+@cindex error on valid input
+@item
+If @code{@value{AS}} produces an error message for valid input, that is a bug.
+
+@cindex invalid input
+@item
+If @code{@value{AS}} does not produce an error message for invalid input, that
+is a bug.  However, you should note that your idea of ``invalid input'' might
+be our idea of ``an extension'' or ``support for traditional practice''.
+
+@item
+If you are an experienced user of assemblers, your suggestions for improvement
+of @code{@value{AS}} are welcome in any case.
+@end itemize
+
+@node Bug Reporting
+@section How to report bugs
+@cindex bug reports
+@cindex @code{@value{AS}} bugs, reporting
+
+A number of companies and individuals offer support for @sc{gnu} products.  If
+you obtained @code{@value{AS}} from a support organization, we recommend you
+contact that organization first.
+
+You can find contact information for many support companies and
+individuals in the file @file{etc/SERVICE} in the @sc{gnu} Emacs
+distribution.
+
+In any event, we also recommend that you send bug reports for @code{@value{AS}}
+to @samp{bug-gnu-utils@@prep.ai.mit.edu}.
+
+The fundamental principle of reporting bugs usefully is this:
+@strong{report all the facts}.  If you are not sure whether to state a
+fact or leave it out, state it!
+
+Often people omit facts because they think they know what causes the problem
+and assume that some details do not matter.  Thus, you might assume that the
+name of a symbol you use in an example does not matter.  Well, probably it does
+not, but one cannot be sure.  Perhaps the bug is a stray memory reference which
+happens to fetch from the location where that name is stored in memory;
+perhaps, if the name were different, the contents of that location would fool
+the assembler into doing the right thing despite the bug.  Play it safe and
+give a specific, complete example.  That is the easiest thing for you to do,
+and the most helpful.
+
+Keep in mind that the purpose of a bug report is to enable us to fix the bug if
+it is new to us.  Therefore, always write your bug reports on the assumption
+that the bug has not been reported previously.
+
+Sometimes people give a few sketchy facts and ask, ``Does this ring a
+bell?''  Those bug reports are useless, and we urge everyone to
+@emph{refuse to respond to them} except to chide the sender to report
+bugs properly.
+
+To enable us to fix the bug, you should include all these things:
+
+@itemize @bullet
+@item
+The version of @code{@value{AS}}.  @code{@value{AS}} announces it if you start
+with the @samp{--version} argument.
+
+Without this, we will not know whether there is any point in looking for
+the bug in the current version of @code{@value{AS}}.
+
+@item
+Any patches you may have applied to the @code{@value{AS}} source.
+
+@item
+The type of machine you are using, and the operating system name and
+version number.
+
+@item
+What compiler (and its version) was used to compile @code{@value{AS}}---e.g.
+``@code{gcc-2.7}''.
+
+@item
+The command arguments you gave the assembler to assemble your example and
+observe the bug.  To guarantee you will not omit something important, list them
+all.  A copy of the Makefile (or the output from make) is sufficient.
+
+If we were to try to guess the arguments, we would probably guess wrong
+and then we might not encounter the bug.
+
+@item
+A complete input file that will reproduce the bug.  If the bug is observed when
+the assembler is invoked via a compiler, send the assembler source, not the
+high level language source.  Most compilers will produce the assembler source
+when run with the @samp{-S} option.  If you are using @code{@value{GCC}}, use
+the options @samp{-v --save-temps}; this will save the assembler source in a
+file with an extension of @file{.s}, and also show you exactly how
+@code{@value{AS}} is being run.
+
+@item
+A description of what behavior you observe that you believe is
+incorrect.  For example, ``It gets a fatal signal.''
+
+Of course, if the bug is that @code{@value{AS}} gets a fatal signal, then we
+will certainly notice it.  But if the bug is incorrect output, we might not
+notice unless it is glaringly wrong.  You might as well not give us a chance to
+make a mistake.
+
+Even if the problem you experience is a fatal signal, you should still say so
+explicitly.  Suppose something strange is going on, such as, your copy of
+@code{@value{AS}} is out of synch, or you have encountered a bug in the C
+library on your system.  (This has happened!)  Your copy might crash and ours
+would not.  If you told us to expect a crash, then when ours fails to crash, we
+would know that the bug was not happening for us.  If you had not told us to
+expect a crash, then we would not be able to draw any conclusion from our
+observations.
+
+@item
+If you wish to suggest changes to the @code{@value{AS}} source, send us context
+diffs, as generated by @code{diff} with the @samp{-u}, @samp{-c}, or @samp{-p}
+option.  Always send diffs from the old file to the new file.  If you even
+discuss something in the @code{@value{AS}} source, refer to it by context, not
+by line number.
+
+The line numbers in our development sources will not match those in your
+sources.  Your line numbers would convey no useful information to us.
+@end itemize
+
+Here are some things that are not necessary:
+
+@itemize @bullet
+@item
+A description of the envelope of the bug.
+
+Often people who encounter a bug spend a lot of time investigating
+which changes to the input file will make the bug go away and which
+changes will not affect it.
+
+This is often time consuming and not very useful, because the way we
+will find the bug is by running a single example under the debugger
+with breakpoints, not by pure deduction from a series of examples.
+We recommend that you save your time for something else.
+
+Of course, if you can find a simpler example to report @emph{instead}
+of the original one, that is a convenience for us.  Errors in the
+output will be easier to spot, running under the debugger will take
+less time, and so on.
+
+However, simplification is not vital; if you do not want to do this,
+report the bug anyway and send us the entire test case you used.
+
+@item
+A patch for the bug.
+
+A patch for the bug does help us if it is a good one.  But do not omit
+the necessary information, such as the test case, on the assumption that
+a patch is all we need.  We might see problems with your patch and decide
+to fix the problem another way, or we might not understand it at all.
+
+Sometimes with a program as complicated as @code{@value{AS}} it is very hard to
+construct an example that will make the program follow a certain path through
+the code.  If you do not send us the example, we will not be able to construct
+one, so we will not be able to verify that the bug is fixed.
+
+And if we cannot understand what bug you are trying to fix, or why your
+patch should be an improvement, we will not install it.  A test case will
+help us to understand.
+
+@item
+A guess about what the bug is or what it depends on.
+
+Such guesses are usually wrong.  Even we cannot guess right about such
+things without first using the debugger to find the facts.
+@end itemize
+
 @node Acknowledgements
 @chapter Acknowledgements