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1 LWLINK linker scripts
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2
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3 A linker script is used to instruct the linker about how to assemble the
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4 various sections into a completed binary. It consists of a series of
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5 directives which are considered in the order they are encountered. Any
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6 section not referenced by a directive is assumed to be loaded after the
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7 final section explicitly referenced.
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8
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9 A section may only be referenced once. Any subsequent references will have
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10 no effect.
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11
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12 section <name> load at <addr>
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13
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14 This causes the section <name> to load at <addr>. For raw target, only one
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15 "load at" entry is allowed for non-bss sections and it must be the first
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16 one. For raw targets, it affects the addresses the linker assigns to symbols
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17 but has no other affect on the output. bss sections may all have separate
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18 load addresses but since they will not appear in the binary anyway, this is
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19 okay.
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20
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21 For the DECB target, each "load at" entry will cause a new "block" to be
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22 output to the binary which will contain the load address. It is legal for
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23 sections to overlap in this manner - the linker assumes the loader will sort
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24 everything out.
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25
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26 section <name> load after <name2>
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27
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28 This will cause the section <name> to load after <name2>. This has the
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29 effect of essentially gluing <name> onto the end of <name2>. If multiple
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30 sections are specified to load after a particular section, they will load in
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31 the order specified.
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32
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33 pad to <size>
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34
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35 This will cause the output file to be padded with NUL bytes to be exactly
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36 <size> bytes in length. This only makes sense for a raw target.
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37
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38
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39 If <name> is "*", then any section not already matched by the script will be
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40 matched. For format *,<flags> can be used to select sections which have
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41 particular flags set (or not set). For instance:
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42
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43 *,!bss This would match all sections that do not have the bss flag set
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44 *,bss this would match all sections that do have the bss flag set
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45
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46
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