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Added a "fillval" attribute to the segment definition. When given, it

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overrides the value from the memory area for all space that lies within the
segment itself.


git-svn-id: svn://svn.cc65.org/cc65/trunk@5823 b7a2c559-68d2-44c3-8de9-860c34a00d81
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uz
2012-09-09 19:00:43 +00:00
parent 1c77d3a6f0
commit 574c8fa273
5 changed files with 55 additions and 19 deletions
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doc/ld65.sgml
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@@ -728,8 +728,11 @@ into a memory area that is marked as readonly.
Unused memory in a memory area may be filled. Use the "<tt/fill = yes/"
attribute to request this. The default value to fill unused space is zero. If
you don't like this, you may specify a byte value that is used to fill these
areas with the "<tt/fillval/" attribute. This value is also used to fill unfilled
areas generated by the assemblers <tt/.ALIGN/ and <tt/.RES/ directives.
areas with the "<tt/fillval/" attribute. If there is no "<tt/fillval/"
attribute for the segment, the "<tt/fillval/" attribute of the memory area (or
its default) is used instead. This means that the value may also be used to
fill unfilled areas generated by the assemblers <tt/.ALIGN/ and <tt/.RES/
directives.
The symbol <tt/%S/ may be used to access the default start address (that is,
the one defined in the <ref id="FEATURES" name="FEATURES"> section, or the
@@ -804,6 +807,13 @@ segment in the load memory area, in case different load and run areas have
been specified. There are no special attributes to set start or offset for
just the load memory area.
A "<tt/fillval/" attribute may not only be specified for a memory area, but
also for a segment. The value must be an integer between 0 and 255. It is used
as fill value for space reserved by the assemblers <tt/.ALIGN/ and <tt/.RES/
commands. It is also used as fill value for space between sections (part of a
segment that comes from one object file) caused by alignment, but not for
space that preceeds the first section.
To suppress the warning, the linker issues if it encounters a segment that is
not found in any of the input files, use "<tt/optional=yes/" as additional
segment attribute. Be careful when using this attribute, because a missing