* doc/as.texinfo (Pseudo Ops): Remove no-file-dir conditional around
menu entry for File; remove version-specific .file operands from menu description. Replace "LNS directives" menu entry with new entries for "Loc" and "Loc_mark_labels". (LNS directives): Split into separate nodes for each directive. (Loc): New node for .loc directive. Mention that this directive is for DWARF2 and add a missing article. (Loc_mark_labels): Likewise for .loc_mark_labels. (File): Change this node to describe both the default version and the DWARF2 version of .file. Move the no-file-dir conditional to include only the default version.
This commit is contained in:
Bob Wilson
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ad5fec3b3a
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14082c7624
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@ -1,3 +1,17 @@
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2008-10-09 Bob Wilson <bob.wilson@acm.org>
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* doc/as.texinfo (Pseudo Ops): Remove no-file-dir conditional around
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menu entry for File; remove version-specific .file operands from menu
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description. Replace "LNS directives" menu entry with new entries
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for "Loc" and "Loc_mark_labels".
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(LNS directives): Split into separate nodes for each directive.
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(Loc): New node for .loc directive. Mention that this directive
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is for DWARF2 and add a missing article.
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(Loc_mark_labels): Likewise for .loc_mark_labels.
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(File): Change this node to describe both the default version and
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the DWARF2 version of .file. Move the no-file-dir conditional to
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include only the default version.
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2008-10-09 Eric Botcazou <ebotcazou@adacore.com>
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* dw2gencfi.c (cfi_finish): Deal with md_fix_up_eh_frame.
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@ -3841,10 +3841,7 @@ Some machine configurations provide additional directives.
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* Exitm:: @code{.exitm}
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* Extern:: @code{.extern}
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* Fail:: @code{.fail}
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@ifclear no-file-dir
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* File:: @code{.file @var{string}}
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@end ifclear
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* File:: @code{.file}
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* Fill:: @code{.fill @var{repeat} , @var{size} , @var{value}}
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* Float:: @code{.float @var{flonums}}
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* Func:: @code{.func}
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@ -3875,8 +3872,8 @@ Some machine configurations provide additional directives.
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* Linkonce:: @code{.linkonce [@var{type}]}
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* List:: @code{.list}
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* Ln:: @code{.ln @var{line-number}}
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* LNS directives:: @code{.file}, @code{.loc}, etc.
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* Loc:: @code{.loc @var{fileno} @var{lineno}}
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* Loc_mark_labels:: @code{.loc_mark_labels @var{enable}}
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@ifset ELF
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* Local:: @code{.local @var{names}}
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@end ifset
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@ -4244,22 +4241,11 @@ mark a code segment that has only one return address which is reached
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by a direct branch and no copy of the return address exists in memory
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or another register.
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@node LNS directives
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@section @code{.file @var{fileno} @var{filename}}
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@cindex @code{file} directive
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When emitting dwarf2 line number information @code{.file} assigns filenames
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to the @code{.debug_line} file name table. The @var{fileno} operand should
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be a unique positive integer to use as the index of the entry in the table.
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The @var{filename} operand is a C string literal.
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The detail of filename indices is exposed to the user because the filename
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table is shared with the @code{.debug_info} section of the dwarf2 debugging
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information, and thus the user must know the exact indices that table
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entries will have.
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@node Loc
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@section @code{.loc @var{fileno} @var{lineno} [@var{column}] [@var{options}]}
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@cindex @code{loc} directive
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The @code{.loc} directive will add row to the @code{.debug_line} line
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When emitting DWARF2 line number information,
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the @code{.loc} directive will add a row to the @code{.debug_line} line
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number matrix corresponding to the immediately following assembly
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instruction. The @var{fileno}, @var{lineno}, and optional @var{column}
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arguments will be applied to the @code{.debug_line} state machine before
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@ -4291,9 +4277,11 @@ state machine to @var{value}, which must be an unsigned integer.
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@end table
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@node Loc_mark_labels
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@section @code{.loc_mark_labels @var{enable}}
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@cindex @code{loc_mark_labels} directive
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The @code{.loc_mark_labels} directive makes the assembler emit an entry
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When emitting DWARF2 line number information,
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the @code{.loc_mark_labels} directive makes the assembler emit an entry
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to the @code{.debug_line} line number matrix with the @code{basic_block}
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register in the state machine set whenever a code label is seen.
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The @var{enable} argument should be either 1 or 0, to enable or disable
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@ -4529,21 +4517,51 @@ than 500, @command{@value{AS}} will print an error message. The message will
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include the value of @var{expression}. This can occasionally be useful inside
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complex nested macros or conditional assembly.
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@ifclear no-file-dir
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@node File
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@section @code{.file @var{string}}
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@section @code{.file}
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@cindex @code{file} directive
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@ifclear no-file-dir
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There are two different versions of the @code{.file} directive. Targets
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that support DWARF2 line number information use the DWARF2 version of
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@code{.file}. Other targets use the default version.
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@subheading Default Version
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@cindex logical file name
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@cindex file name, logical
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@code{.file} tells @command{@value{AS}} that we are about to start a new logical
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file. @var{string} is the new file name. In general, the filename is
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This version of the @code{.file} directive tells @command{@value{AS}} that we
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are about to start a new logical file. The syntax is:
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@smallexample
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.file @var{string}
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@end smallexample
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@var{string} is the new file name. In general, the filename is
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recognized whether or not it is surrounded by quotes @samp{"}; but if you wish
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to specify an empty file name, you must give the quotes--@code{""}. This
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statement may go away in future: it is only recognized to be compatible with
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old @command{@value{AS}} programs.
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@subheading DWARF2 Version
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@end ifclear
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When emitting DWARF2 line number information, @code{.file} assigns filenames
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to the @code{.debug_line} file name table. The syntax is:
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@smallexample
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.file @var{fileno} @var{filename}
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@end smallexample
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The @var{fileno} operand should be a unique positive integer to use as the
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index of the entry in the table. The @var{filename} operand is a C string
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literal.
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The detail of filename indices is exposed to the user because the filename
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table is shared with the @code{.debug_info} section of the DWARF2 debugging
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information, and thus the user must know the exact indices that table
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entries will have.
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@node Fill
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@section @code{.fill @var{repeat} , @var{size} , @var{value}}
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