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<a name="MSP430"></a>
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<hr>
<a name="ld-and-MSP430"></a>
<h3 class="section">4.8 <code>ld</code> and MSP430</h3>
<p>For the MSP430 it is possible to select the MPU architecture.  The flag &lsquo;<samp>-m [mpu type]</samp>&rsquo;
will select an appropriate linker script for selected MPU type.  (To get a list of known MPUs
just pass &lsquo;<samp>-m help</samp>&rsquo; option to the linker).
</p>
<a name="index-MSP430-extra-sections"></a>
<p>The linker will recognize some extra sections which are MSP430 specific:
</p>
<dl compact="compact">
<dt><code>&lsquo;<samp>.vectors</samp>&rsquo;</code></dt>
<dd><p>Defines a portion of ROM where interrupt vectors located.
</p>
</dd>
<dt><code>&lsquo;<samp>.bootloader</samp>&rsquo;</code></dt>
<dd><p>Defines the bootloader portion of the ROM (if applicable).  Any code
in this section will be uploaded to the MPU.
</p>
</dd>
<dt><code>&lsquo;<samp>.infomem</samp>&rsquo;</code></dt>
<dd><p>Defines an information memory section (if applicable).  Any code in
this section will be uploaded to the MPU.
</p>
</dd>
<dt><code>&lsquo;<samp>.infomemnobits</samp>&rsquo;</code></dt>
<dd><p>This is the same as the &lsquo;<samp>.infomem</samp>&rsquo; section except that any code
in this section will not be uploaded to the MPU.
</p>
</dd>
<dt><code>&lsquo;<samp>.noinit</samp>&rsquo;</code></dt>
<dd><p>Denotes a portion of RAM located above &lsquo;<samp>.bss</samp>&rsquo; section.
</p>
<p>The last two sections are used by gcc.
</p></dd>
</dl>

<dl compact="compact">
<dd><a name="index-MSP430-Options"></a>
<a name="index-_002d_002dcode_002dregion"></a>
</dd>
<dt><samp>--code-region=[either,lower,upper,none]</samp></dt>
<dd><p>This will transform .text* sections to [either,lower,upper].text* sections. The
argument passed to GCC for -mcode-region is propagated to the linker
using this option.
</p>
<a name="index-_002d_002ddata_002dregion"></a>
</dd>
<dt><samp>--data-region=[either,lower,upper,none]</samp></dt>
<dd><p>This will transform .data*, .bss* and .rodata* sections to
[either,lower,upper].[data,bss,rodata]* sections. The argument passed to GCC
for -mdata-region is propagated to the linker using this option.
</p>
<a name="index-_002d_002ddisable_002dsec_002dtransformation"></a>
</dd>
<dt><samp>--disable-sec-transformation</samp></dt>
<dd><p>Prevent the transformation of sections as specified by the <code>--code-region</code>
and <code>--data-region</code> options.
This is useful if you are compiling and linking using a single call to the GCC
wrapper, and want to compile the source files using -m[code,data]-region but
not transform the sections for prebuilt libraries and objects.
</p></dd>
</dl>


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