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author | lost |
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date | Wed, 21 Jan 2009 06:14:08 +0000 |
parents | 7a3d66e72a4c |
children | 9c6462b3a288 |
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LWLINK linker scripts A linker script is used to instruct the linker about how to assemble the various sections into a completed binary. It consists of a series of directives which are considered in the order they are encountered. Any section not referenced by a directive is assumed to be loaded after the final section explicitly referenced. A section may only be referenced once. Any subsequent references will have no effect. section <name> load at <addr> This causes the section <name> to load at <addr>. For raw target, only one "load at" entry is allowed for non-bss sections and it must be the first one. For raw targets, it affects the addresses the linker assigns to symbols but has no other affect on the output. bss sections may all have separate load addresses but since they will not appear in the binary anyway, this is okay. For the DECB target, each "load at" entry will cause a new "block" to be output to the binary which will contain the load address. It is legal for sections to overlap in this manner - the linker assumes the loader will sort everything out. section <name> load after <name2> This will cause the section <name> to load after <name2>. This has the effect of essentially gluing <name> onto the end of <name2>. If multiple sections are specified to load after a particular section, they will load in the order specified. pad to <size> This will cause the output file to be padded with NUL bytes to be exactly <size> bytes in length. This only makes sense for a raw target. If <name> is "*", then any section not already matched by the script will be matched. For format *,<flags> can be used to select sections which have particular flags set (or not set). For instance: *,!bss This would match all sections that do not have the bss flag set *,bss this would match all sections that do have the bss flag set