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Diffstat (limited to 'contrib/binutils/gas/doc/as.texinfo')
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1 files changed, 351 insertions, 84 deletions
diff --git a/contrib/binutils/gas/doc/as.texinfo b/contrib/binutils/gas/doc/as.texinfo index 7bfdc08..5917a00 100644 --- a/contrib/binutils/gas/doc/as.texinfo +++ b/contrib/binutils/gas/doc/as.texinfo @@ -1,5 +1,5 @@ \input texinfo @c -*-Texinfo-*- -@c Copyright (c) 1991, 92, 93, 94, 95, 96, 97, 1998 +@c Copyright (c) 1991, 92, 93, 94, 95, 96, 97, 98, 2000 @c Free Software Foundation, Inc. @c UPDATE!! On future updates-- @c (1) check for new machine-dep cmdline options in @@ -16,6 +16,7 @@ @set have-stabs @c --- @include asconfig.texi +@include gasver.texi @c --- @c common OR combinations of conditions @ifset AOUT @@ -115,7 +116,7 @@ into another language, under the above conditions for modified versions. @subtitle for the @value{TARGET} family @end ifclear @sp 1 -@subtitle January 1994 +@subtitle Version @value{VERSION} @sp 1 @sp 13 The Free Software Foundation Inc. thanks The Nice Computer @@ -160,7 +161,8 @@ into another language, under the above conditions for modified versions. @node Top @top Using @value{AS} -This file is a user guide to the @sc{gnu} assembler @code{@value{AS}}. +This file is a user guide to the @sc{gnu} assembler @code{@value{AS}} version +@value{VERSION}. @ifclear GENERIC This version of the file describes @code{@value{AS}} configured to generate code for @value{TARGET} architectures. @@ -200,9 +202,10 @@ Here is a brief summary of how to invoke @code{@value{AS}}. For details, @c to be limited to one line for the header. @smallexample @value{AS} [ -a[cdhlns][=file] ] [ -D ] [ --defsym @var{sym}=@var{val} ] - [ -f ] [ --gstabs ] [ --help ] [ -I @var{dir} ] [ -J ] [ -K ] [ -L ] + [ -f ] [ --gstabs ] [ --gdwarf2 ] [ --help ] [ -I @var{dir} ] [ -J ] [ -K ] [ -L ] [ --keep-locals ] [ -o @var{objfile} ] [ -R ] [ --statistics ] [ -v ] - [ -version ] [ --version ] [ -W ] [ -w ] [ -x ] [ -Z ] + [ -version ] [ --version ] [ -W ] [ --warn ] [ --fatal-warnings ] + [ -w ] [ -x ] [ -Z ] @ifset A29K @c am29k has no machine-dependent assembler options @end ifset @@ -210,22 +213,36 @@ Here is a brief summary of how to invoke @code{@value{AS}}. For details, [ -mbig-endian | -mlittle-endian ] @end ifset @ifset ARM - [ -m[arm]1 | -m[arm]2 | -m[arm]250 | -m[arm]3 | -m[arm]6 | -m[arm]7[t][[d]m[i]] ] - [ -m[arm]v2 | -m[arm]v2a | -m[arm]v3 | -m[arm]v3m | -m[arm]v4 | -m[arm]v4t ] + [ -m[arm]1 | -m[arm]2 | -m[arm]250 | -m[arm]3 | -m[arm]6 | -m[arm]60 | + -m[arm]600 | -m[arm]610 | -m[arm]620 | -m[arm]7[t][[d]m[i]][fe] | -m[arm]70 | + -m[arm]700 | -m[arm]710[c] | -m[arm]7100 | -m[arm]7500 | -m[arm]8 | + -m[arm]810 | -m[arm]9 | -m[arm]920 | -m[arm]920t | -m[arm]9tdmi | + -mstrongarm | -mstrongarm110 | -mstrongarm1100 ] + [ -m[arm]v2 | -m[arm]v2a | -m[arm]v3 | -m[arm]v3m | -m[arm]v4 | -m[arm]v4t | + -m[arm]v5 | -[arm]v5t ] [ -mthumb | -mall ] [ -mfpa10 | -mfpa11 | -mfpe-old | -mno-fpu ] [ -EB | -EL ] - [ -mapcs-32 | -mapcs-26 ] + [ -mapcs-32 | -mapcs-26 | -mapcs-float | -mapcs-reentrant ] + [ -mthumb-interwork ] + [ -moabi ] + [ -k ] @end ifset @ifset D10V [ -O ] @end ifset +@ifset D30V + [ -O | -n | -N ] +@end ifset @ifset H8 @c Hitachi family chips have no machine-dependent assembler options @end ifset @ifset HPPA @c HPPA has no machine-dependent assembler options (yet). @end ifset +@ifset PJ + [ -mb | -me ] +@end ifset @ifset SPARC @c The order here is important. See c-sparc.texi. [ -Av6 | -Av7 | -Av8 | -Asparclet | -Asparclite @@ -243,6 +260,9 @@ Here is a brief summary of how to invoke @code{@value{AS}}. For details, @ifset M680X0 [ -l ] [ -m68000 | -m68010 | -m68020 | ... ] @end ifset +@ifset MCORE + [ -jsri2bsr ] [ -sifilter ] [ -relax ] +@end ifset @ifset MIPS [ -nocpp ] [ -EL ] [ -EB ] [ -G @var{num} ] [ -mcpu=@var{CPU} ] [ -mips1 ] [ -mips2 ] [ -mips3 ] [ -m4650 ] [ -no-m4650 ] @@ -303,6 +323,10 @@ compiler output). Generate stabs debugging information for each assembler line. This may help debugging assembler code, if the debugger can handle it. +@item --gdwarf2 +Generate DWARF2 debugging information for each assembler line. This +may help debugging assembler code, if the debugger can handle it. + @item --help Print a summary of the command line options and exit. @@ -347,8 +371,15 @@ Print the @code{as} version. Print the @code{as} version and exit. @item -W +@itemx --no-warn Suppress warning messages. +@item --fatal-warnings +Treat warnings as errors. + +@item --warn +Don't suppress warning messages or treat them as errors. + @item -w Ignored. @@ -387,16 +418,23 @@ The following options are available when @value{AS} is configured for the ARM processor family. @table @code -@item -m[arm]1 | -m[arm]2 | -m[arm]250 | -m[arm]3 | -m[arm]6 | -m[arm]7[t][[d]m] | -m[arm]v2 | -m[arm]v2a | -m[arm]v3 | -m[arm]v3m | -m[arm]v4 | -m[arm]v4t -Specify which variant of the ARM architecture is the target. +@item -m[arm][1|2|3|6|7|8|9][...] +Specify which ARM processor variant is the target. +@item -m[arm]v[2|2a|3|3m|4|4t|5|5t] +Specify which ARM architecture variant is used by the target. @item -mthumb | -mall Enable or disable Thumb only instruction decoding. @item -mfpa10 | -mfpa11 | -mfpe-old | -mno-fpu Select which Floating Point architcture is the target. -@item -mapcs-32 | -mapcs-26 +@item -mapcs-32 | -mapcs-26 | -mapcs-float | -mapcs-reentrant | -moabi Select which procedure calling convention is in use. @item -EB | -EL Select either big-endian (-EB) or little-endian (-EL) output. +@item -mthumb-interwork +Specify that the code has been generated with interworking between Thumb and +ARM code in mind. +@item -k +Specify that PIC code has been generated. @end table @end ifset @@ -411,6 +449,24 @@ Optimize output by parallelizing instructions. @end table @end ifset +@ifset D30V +The following options are available when @value{AS} is configured for a D30V +processor. +@table @code +@cindex D30V optimization +@cindex optimization, D30V +@item -O +Optimize output by parallelizing instructions. + +@cindex D30V nops +@item -n +Warn when nops are generated. + +@cindex D30V nops after 32-bit multiply +@item -N +Warn when a nop after a 32-bit multiply instruction is generated. +@end table +@end ifset @ifset I960 The following options are available when @value{AS} is configured for the @@ -459,6 +515,26 @@ unit coprocessor. The default is to assume an MMU for 68020 and up. @end table @end ifset +@ifset PJ +The following options are available when @value{AS} is configured for +a picoJava processor. + +@table @code + +@cindex PJ endianness +@cindex endianness, PJ +@cindex big endian output, PJ +@item -mb +Generate ``big endian'' format output. + +@cindex little endian output, PJ +@item -ml +Generate ``little endian'' format output. + +@end table +@end ifset + + @ifset SPARC The following options are available when @code{@value{AS}} is configured for the SPARC architecture: @@ -565,6 +641,28 @@ break exception. @end table @end ifset +@ifset MCORE +The following options are available when @value{AS} is configured for +an MCore processor. + +@table @code +@item -jsri2bsr +@itemx -nojsri2bsr +Enable or disable the JSRI to BSR transformation. By default this is enabled. +The command line option @samp{-nojsri2bsr} can be used to disable it. + +@item -sifilter +@itemx -nosifilter +Enable or disable the silicon filter behaviour. By default this is disabled. +The default can be overidden by the @samp{-sifilter} command line option. + +@item -relax +Alter jump instructions for long displacements. + + +@end table +@end ifset + @menu * Manual:: Structure of this Manual * GNU Assembler:: The GNU Assembler @@ -791,10 +889,11 @@ number in a physical file; the other refers to a line number in a to @code{@value{AS}}. @dfn{Logical files} are simply names declared explicitly by assembler -directives; they bear no relation to physical files. Logical file names -help error messages reflect the original source file, when @code{@value{AS}} -source is itself synthesized from other files. -@xref{App-File,,@code{.app-file}}. +directives; they bear no relation to physical files. Logical file names help +error messages reflect the original source file, when @code{@value{AS}} source +is itself synthesized from other files. @code{@value{AS}} understands the +@samp{#} directives emitted by the @code{@value{GCC}} preprocessor. See also +@ref{File,,@code{.file}}. @node Object @section Output (Object) File @@ -853,9 +952,8 @@ file_name:@b{NNN}:Warning Message Text @noindent @cindex line numbers, in warnings/errors (where @b{NNN} is a line number). If a logical file name has been given -(@pxref{App-File,,@code{.app-file}}) it is used for the filename, -otherwise the name of the current input file is used. If a logical line -number was given +(@pxref{File,,@code{.file}}) it is used for the filename, otherwise the name of +the current input file is used. If a logical line number was given @ifset GENERIC (@pxref{Line,,@code{.line}}) @end ifset @@ -894,18 +992,19 @@ to the @value{TARGET}. to particular machine architectures. @end ifset -If you are invoking @code{@value{AS}} via the @sc{gnu} C compiler (version 2), you -can use the @samp{-Wa} option to pass arguments through to the -assembler. The assembler arguments must be separated from each other -(and the @samp{-Wa}) by commas. For example: +If you are invoking @code{@value{AS}} via the @sc{gnu} C compiler (version 2), +you can use the @samp{-Wa} option to pass arguments through to the assembler. +The assembler arguments must be separated from each other (and the @samp{-Wa}) +by commas. For example: @smallexample gcc -c -g -O -Wa,-alh,-L file.c @end smallexample @noindent -emits a listing to standard output with high-level -and assembly source. +This passes two options to the assembler: @samp{-alh} (emit a listing to +standard output with with high-level and assembly source) and @samp{-L} (retain +local symbols in the symbol table). Usually you do not need to use this @samp{-Wa} mechanism, since many compiler command-line options are automatically passed to the assembler by the compiler. @@ -933,7 +1032,7 @@ assembler.) * statistics:: --statistics to see statistics about assembly * traditional-format:: --traditional-format for compatible output * v:: -v to announce version -* W:: -W to suppress warnings +* W:: -W, --no-warn, --warn, --fatal-warnings to control warnings * Z:: -Z to make object file even after errors @end menu @@ -1309,19 +1408,32 @@ option @samp{-v} (which you can also spell as @samp{-version}) on the command line. @node W -@section Suppress Warnings: @code{-W} +@section Control Warnings: @code{-W}, @code{--warn}, @code{--no-warn}, @code{--fatal-warnings} -@kindex -W -@cindex suppressing warnings -@cindex warnings, suppressing @code{@value{AS}} should never give a warning or error message when assembling compiler output. But programs written by people often cause @code{@value{AS}} to give a warning that a particular assumption was made. All such warnings are directed to the standard error file. -If you use this option, no warnings are issued. This option only -affects the warning messages: it does not change any particular of how -@code{@value{AS}} assembles your file. Errors, which stop the assembly, are -still reported. + +@kindex @samp{-W} +@kindex @samp{--no-warn} +@cindex suppressing warnings +@cindex warnings, suppressing +If you use the @code{-W} and @code{--no-warn} options, no warnings are issued. +This only affects the warning messages: it does not change any particular of +how @code{@value{AS}} assembles your file. Errors, which stop the assembly, +are still reported. + +@kindex @samp{--fatal-warnings} +@cindex errors, caused by warnings +@cindex warnings, causing error +If you use the @code{--fatal-warnings} option, @code{@value{AS}} considers +files that generate warnings to be in error. + +@kindex @samp{--warn} +@cindex warnings, switching on +You can switch these options off again by specifying @code{--warn}, which +causes warnings to be output as usual. @node Z @section Generate Object File in Spite of Errors: @code{-Z} @@ -1443,6 +1555,9 @@ is considered a comment and is ignored. The line comment character is @ifset ARC @samp{;} on the ARC; @end ifset +@ifset ARM +@samp{@@} on the ARM; +@end ifset @ifset H8/300 @samp{;} for the H8/300 family; @end ifset @@ -1455,6 +1570,9 @@ is considered a comment and is ignored. The line comment character is @ifset I960 @samp{#} on the i960; @end ifset +@ifset PJ +@samp{;} for picoJava; +@end ifset @ifset SH @samp{!} for the Hitachi SH; @end ifset @@ -1593,16 +1711,6 @@ exception: they do not end statements. It is an error to end any statement with end-of-file: the last character of any input file should be a newline.@refill -@cindex continuing statements -@cindex multi-line statements -@cindex statement on multiple lines -You may write a statement on more than one line if you put a -backslash (@kbd{\}) immediately in front of any newlines within the -statement. When @code{@value{AS}} reads a backslashed newline both -characters are ignored. You can even put backslashed newlines in -the middle of symbol names without changing the meaning of your -source program. - An empty statement is allowed, and may include whitespace. It is ignored. @cindex instructions and directives @@ -2982,7 +3090,6 @@ Some machine configurations provide additional directives. @end ifset * Align:: @code{.align @var{abs-expr} , @var{abs-expr}} -* App-File:: @code{.app-file @var{string}} * Ascii:: @code{.ascii "@var{string}"}@dots{} * Asciz:: @code{.asciz "@var{string}"}@dots{} * Balign:: @code{.balign @var{abs-expr} , @var{abs-expr}} @@ -3002,21 +3109,27 @@ Some machine configurations provide additional directives. * Double:: @code{.double @var{flonums}} * Eject:: @code{.eject} * Else:: @code{.else} +* Elseif:: @code{.elseif} +* End:: @code{.end} @ifset COFF * Endef:: @code{.endef} @end ifset +* Endfunc:: @code{.endfunc} * Endif:: @code{.endif} * Equ:: @code{.equ @var{symbol}, @var{expression}} * Equiv:: @code{.equiv @var{symbol}, @var{expression}} * Err:: @code{.err} +* Exitm:: @code{.exitm} * Extern:: @code{.extern} +* Fail:: @code{.fail} @ifclear no-file-dir * File:: @code{.file @var{string}} @end ifclear * Fill:: @code{.fill @var{repeat} , @var{size} , @var{value}} * Float:: @code{.float @var{flonums}} +* Func:: @code{.func} * Global:: @code{.global @var{symbol}}, @code{.globl @var{symbol}} * hword:: @code{.hword @var{expressions}} * Ident:: @code{.ident} @@ -3046,7 +3159,9 @@ Some machine configurations provide additional directives. * Octa:: @code{.octa @var{bignums}} * Org:: @code{.org @var{new-lc} , @var{fill}} * P2align:: @code{.p2align @var{abs-expr} , @var{abs-expr}} +* Print:: @code{.print @var{string}} * Psize:: @code{.psize @var{lines}, @var{columns}} +* Purgem:: @code{.purgem @var{name}} * Quad:: @code{.quad @var{bignums}} * Rept:: @code{.rept @var{count}} * Sbttl:: @code{.sbttl "@var{subheading}"} @@ -3070,6 +3185,7 @@ Some machine configurations provide additional directives. @end ifset * String:: @code{.string "@var{str}"} +* Struct:: @code{.struct @var{expression}} @ifset ELF * Symver:: @code{.symver @var{name},@var{name2@@nodename}} @end ifset @@ -3083,6 +3199,9 @@ Some machine configurations provide additional directives. * Type:: @code{.type @var{int}} * Val:: @code{.val @var{addr}} @end ifset +@ifset ELF +* Visibility:: @code{.internal @var{name}, .hidden @var{name}, .protected @var{name}} +@end ifset * Uleb128:: @code{.uleb128 @var{expressions}} * Word:: @code{.word @var{expressions}} @@ -3157,24 +3276,6 @@ GAS also provides @code{.balign} and @code{.p2align} directives, described later, which have a consistent behavior across all architectures (but are specific to GAS). -@node App-File -@section @code{.app-file @var{string}} - -@cindex logical file name -@cindex file name, logical -@cindex @code{app-file} directive -@code{.app-file} -@ifclear no-file-dir -(which may also be spelled @samp{.file}) -@end ifclear -tells @code{@value{AS}} that we are about to start a new -logical file. @var{string} is the new file name. In general, the -filename is recognized whether or not it is surrounded by quotes @samp{"}; -but if you wish to specify an empty file name is permitted, -you must give the quotes--@code{""}. This statement may go away in -future: it is only recognized to be compatible with old @code{@value{AS}} -programs.@refill - @node Ascii @section @code{.ascii "@var{string}"}@dots{} @@ -3366,15 +3467,20 @@ assembly; @pxref{If,,@code{.if}}. It marks the beginning of a section of code to be assembled if the condition for the preceding @code{.if} was false. -@ignore -@node End, Endef, Else, Pseudo Ops +@node Elseif +@section @code{.elseif} + +@cindex @code{elseif} directive +@code{.elseif} is part of the @code{@value{AS}} support for conditional +assembly; @pxref{If,,@code{.if}}. It is shorthand for beginning a new +@code{.if} block that would otherwise fill the entire @code{.else} section. + +@node End @section @code{.end} @cindex @code{end} directive -This doesn't do anything---but isn't an s_ignore, so I suspect it's -meant to do something eventually (which is why it isn't documented here -as "for compatibility with blah"). -@end ignore +@code{.end} marks the end of the assembly file. @code{@value{AS}} does not +process anything in the file past the @code{.end} directive. @ifset COFF @node Endef @@ -3391,6 +3497,11 @@ directive but ignores it. @end ifset @end ifset +@node Endfunc +@section @code{.endfunc} +@cindex @code{endfunc} directive +@code{.endfunc} marks the end of a function specified with @code{.func}. + @node Endif @section @code{.endif} @@ -3434,6 +3545,10 @@ If @code{@value{AS}} assembles a @code{.err} directive, it will print an error message and, unless the @code{-Z} option was used, it will not generate an object file. This can be used to signal error an conditionally compiled code. +@node Exitm +@section @code{.exitm} +Exit early from the current macro definition. @xref{Macro}. + @node Extern @section @code{.extern} @@ -3442,6 +3557,16 @@ object file. This can be used to signal error an conditionally compiled code. with other assemblers---but it is ignored. @code{@value{AS}} treats all undefined symbols as external. +@node Fail +@section @code{.fail @var{expression}} + +@cindex @code{fail} directive +Generates an error or a warning. If the value of the @var{expression} is 500 +or more, @code{@value{AS}} will print a warning message. If the value is less +than 500, @code{@value{AS}} will print an error message. The message will +include the value of @var{expression}. This can occasionally be useful inside +complex nested macros or conditional assembly. + @ifclear no-file-dir @node File @section @code{.file @var{string}} @@ -3449,13 +3574,12 @@ all undefined symbols as external. @cindex @code{file} directive @cindex logical file name @cindex file name, logical -@code{.file} (which may also be spelled @samp{.app-file}) tells -@code{@value{AS}} that we are about to start a new logical file. -@var{string} is the new file name. In general, the filename is -recognized whether or not it is surrounded by quotes @samp{"}; but if -you wish to specify an empty file name, you must give the -quotes--@code{""}. This statement may go away in future: it is only -recognized to be compatible with old @code{@value{AS}} programs. +@code{.file} tells @code{@value{AS}} that we are about to start a new logical +file. @var{string} is the new file name. In general, the filename is +recognized whether or not it is surrounded by quotes @samp{"}; but if you wish +to specify an empty file name, you must give the quotes--@code{""}. This +statement may go away in future: it is only recognized to be compatible with +old @code{@value{AS}} programs. @ifset A29K In some configurations of @code{@value{AS}}, @code{.file} has already been removed to avoid conflicts with other assemblers. @xref{Machine Dependencies}. @@ -3504,6 +3628,18 @@ in @sc{ieee} format. @end ifset @end ifclear +@node Func +@section @code{.func @var{name}[,@var{label}]} +@cindex @code{func} directive +@code{.func} emits debugging information to denote function @var{name}, and +is ignored unless the file is assembled with debugging enabled. +Only @samp{--gstabs} is currently supported. +@var{label} is the entry point of the function and if omitted @var{name} +prepended with the @samp{leading char} is used. +@samp{leading char} is usually @code{_} or nothing, depending on the target. +All functions are currently defined to have @code{void} return type. +The function must be terminated with @code{.endfunc}. + @node Global @section @code{.global @var{symbol}}, @code{.globl @var{symbol}} @@ -3567,6 +3703,8 @@ considered part of the source program being assembled if the argument the conditional section of code must be marked by @code{.endif} (@pxref{Endif,,@code{.endif}}); optionally, you may include code for the alternative condition, flagged by @code{.else} (@pxref{Else,,@code{.else}}). +If you have several conditions to check, @code{.elseif} may be used to avoid +nesting blocks if/else within each subsequent @code{.else} block. The following variants of @code{.if} are also supported: @table @code @@ -3575,11 +3713,44 @@ The following variants of @code{.if} are also supported: Assembles the following section of code if the specified @var{symbol} has been defined. -@ignore +@cindex @code{ifc} directive +@item .ifc @var{string1},@var{string2} +Assembles the following section of code if the two strings are the same. The +strings may be optionally quoted with single quotes. If they are not quoted, +the first string stops at the first comma, and the second string stops at the +end of the line. Strings which contain whitespace should be quoted. The +string comparison is case sensitive. + +@cindex @code{ifeq} directive +@item .ifeq @var{absolute expression} +Assembles the following section of code if the argument is zero. + @cindex @code{ifeqs} directive -@item .ifeqs -Not yet implemented. -@end ignore +@item .ifeqs @var{string1},@var{string2} +Another form of @code{.ifc}. The strings must be quoted using double quotes. + +@cindex @code{ifge} directive +@item .ifge @var{absolute expression} +Assembles the following section of code if the argument is greater than or +equal to zero. + +@cindex @code{ifgt} directive +@item .ifgt @var{absolute expression} +Assembles the following section of code if the argument is greater than zero. + +@cindex @code{ifle} directive +@item .ifle @var{absolute expression} +Assembles the following section of code if the argument is less than or equal +to zero. + +@cindex @code{iflt} directive +@item .iflt @var{absolute expression} +Assembles the following section of code if the argument is less than zero. + +@cindex @code{ifnc} directive +@item .ifnc @var{string1},@var{string2}. +Like @code{.ifc}, but the sense of the test is reversed: this assembles the +following section of code if the two strings are not the same. @cindex @code{ifndef} directive @cindex @code{ifnotdef} directive @@ -3588,10 +3759,15 @@ Not yet implemented. Assembles the following section of code if the specified @var{symbol} has not been defined. Both spelling variants are equivalent. -@ignore -@item ifnes -Not yet implemented. -@end ignore +@cindex @code{ifne} directive +@item .ifne @var{absolute expression} +Assembles the following section of code if the argument is not equal to zero +(in other words, this is equivalent to @code{.if}). + +@cindex @code{ifnes} directive +@item .ifnes @var{string1},@var{string2} +Like @code{.ifeqs}, but the sense of the test is reversed: this assembles the +following section of code if the two strings are not the same. @end table @node Include @@ -4053,6 +4229,13 @@ filled in with the value 0x368d (the exact placement of the bytes depends upon the endianness of the processor). If it skips 1 or 3 bytes, the fill value is undefined. +@node Print +@section @code{.print @var{string}} + +@cindex @code{print} directive +@code{@value{AS}} will print @var{string} on the standard output during +assembly. You must put @var{string} in double quotes. + @node Psize @section @code{.psize @var{lines} , @var{columns}} @@ -4073,6 +4256,13 @@ lines is exceeded (or whenever you explicitly request one, using If you specify @var{lines} as @code{0}, no formfeeds are generated save those explicitly specified with @code{.eject}. +@node Purgem +@section @code{.purgem @var{name}} + +@cindex @code{purgem} directive +Undefine the macro @var{name}, so that later uses of the string will not be +expanded. @xref{Macro}. + @node Quad @section @code{.quad @var{bignums}} @@ -4184,6 +4374,8 @@ data section read-only section @item x executable section +@item s +shared section (meaningful for PE targets) @end table If no flags are specified, the default flags depend upon the section name. If @@ -4447,6 +4639,26 @@ one string to copy, separated by commas. Unless otherwise specified for a particular machine, the assembler marks the end of each string with a 0 byte. You can use any of the escape sequences described in @ref{Strings,,Strings}. +@node Struct +@section @code{.struct @var{expression}} + +@cindex @code{struct} directive +Switch to the absolute section, and set the section offset to @var{expression}, +which must be an absolute expression. You might use this as follows: +@smallexample + .struct 0 +field1: + .struct field1 + 4 +field2: + .struct field2 + 4 +field3: +@end smallexample +This would define the symbol @code{field1} to have the value 0, the symbol +@code{field2} to have the value 4, and the symbol @code{field3} to have the +value 8. Assembly would be left in the absolute section, and you would need to +use a @code{.section} directive of some sort to change to some other section +before further assembly. + @ifset ELF @node Symver @section @code{.symver} @@ -4561,6 +4773,40 @@ configured for @code{b.out}, it accepts this directive but ignores it. compact, variable length representation of numbers used by the DWARF symbolic debugging format. @xref{Sleb128,@code{.sleb128}}. +@ifset ELF +@node Visibility +@section @code{.internal}, @code{.hidden}, @code{.protected} +@cindex @code{internal} directive +@cindex @code{hidden} directive +@cindex @code{protected} directive +@cindex symbol visibility + +These directives can be used to set the visibility of a specified symbol. By +default a symbol's visibility is set by its binding (local, global or weak), +but these directives can be used to override that. + +A visibility of @code{protected} means that any references to the symbol from +within the component that defines the symbol must be resolved to the definition +in that component, even if a definition in another component would normally +preempt this. + +A visibility of @code{hidden} means that the symbol is not visible to other +components. Such a symbol is always considered to be protected as well. + +A visibility of @code{internal} is the same as a visibility of @code{hidden}, +except that some extra, processor specific processing must also be performed +upon the symbol. + +For ELF targets, the directives are used like this: + +@smallexample +.internal @var{name} +.hidden @var{name} +.protected @var{name} +@end smallexample + +@end ifset + @node Word @section @code{.word @var{expressions}} @@ -4636,7 +4882,6 @@ One day these directives won't work. They are included for compatibility with older assemblers. @table @t @item .abort -@item .app-file @item .line @end table @@ -4670,6 +4915,9 @@ subject, see the hardware manufacturer's manual. @ifset D10V * D10V-Dependent:: D10V Dependent Features @end ifset +@ifset D30V +* D30V-Dependent:: D30V Dependent Features +@end ifset @ifset H8/300 * H8/300-Dependent:: Hitachi H8/300 Dependent Features @end ifset @@ -4679,6 +4927,9 @@ subject, see the hardware manufacturer's manual. @ifset HPPA * HPPA-Dependent:: HPPA Dependent Features @end ifset +@ifset I370 +* ESA/390-Dependent:: IBM ESA/390 Dependent Features +@end ifset @ifset I80386 * i386-Dependent:: Intel 80386 Dependent Features @end ifset @@ -4694,6 +4945,9 @@ subject, see the hardware manufacturer's manual. @ifset SH * SH-Dependent:: Hitachi SH Dependent Features @end ifset +@ifset PJ +* PJ-Dependent:: picoJava Dependent Features +@end ifset @ifset SPARC * Sparc-Dependent:: SPARC Dependent Features @end ifset @@ -4827,6 +5081,9 @@ family. @include c-d10v.texi @end ifset +@ifset D30V +@include c-d30v.texi +@end ifset @ifset H8/300 @include c-h8300.texi @@ -4840,6 +5097,10 @@ family. @include c-hppa.texi @end ifset +@ifset I370 +@include c-i370.texi +@end ifset + @ifset I80386 @include c-i386.texi @end ifset @@ -4861,6 +5122,10 @@ family. @include c-ns32k.texi @end ifset +@ifset PJ +@include c-pj.texi +@end ifset + @ifset SH @include c-sh.texi @end ifset @@ -5167,6 +5432,8 @@ Jeff Law at the University of Utah (HPPA mainly), Michael Meissner of the Open Software Foundation (i386 mainly), and Ken Raeburn of Cygnus Support (sparc, and some initial 64-bit support). +Linas Vepstas added GAS support for the ESA/390 "IBM 370" architecture. + Richard Henderson rewrote the Alpha assembler. Klaus Kaempf wrote GAS and BFD support for openVMS/Alpha. |
