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| <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 ‘<samp><span class="samp">-m [mpu type]</span></samp>’ |
| will select an appropriate linker script for selected MPU type. (To get a list of known MPUs |
| just pass ‘<samp><span class="samp">-m help</span></samp>’ option to the linker). |
| |
| <p><a name="index-MSP430-extra-sections-694"></a>The linker will recognize some extra sections which are MSP430 specific: |
| |
| <dl> |
| <dt><code>‘</code><samp><span class="samp">.vectors</span></samp><code>’</code><dd>Defines a portion of ROM where interrupt vectors located. |
| |
| <br><dt><code>‘</code><samp><span class="samp">.bootloader</span></samp><code>’</code><dd>Defines the bootloader portion of the ROM (if applicable). Any code |
| in this section will be uploaded to the MPU. |
| |
| <br><dt><code>‘</code><samp><span class="samp">.infomem</span></samp><code>’</code><dd>Defines an information memory section (if applicable). Any code in |
| this section will be uploaded to the MPU. |
| |
| <br><dt><code>‘</code><samp><span class="samp">.infomemnobits</span></samp><code>’</code><dd>This is the same as the ‘<samp><span class="samp">.infomem</span></samp>’ section except that any code |
| in this section will not be uploaded to the MPU. |
| |
| <br><dt><code>‘</code><samp><span class="samp">.noinit</span></samp><code>’</code><dd>Denotes a portion of RAM located above ‘<samp><span class="samp">.bss</span></samp>’ section. |
| |
| <p>The last two sections are used by gcc. |
| </dl> |
| |
| |
| <a name="index-MSP430-Options-695"></a> |
| <a name="index-g_t_002d_002dcode_002dregion-696"></a> |
| <dl><dt><samp><span class="option">--code-region=[either,lower,upper,none]</span></samp><dd>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-g_t_002d_002ddata_002dregion-697"></a><br><dt><samp><span class="option">--data-region=[either,lower,upper,none]</span></samp><dd>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-g_t_002d_002ddisable_002dsec_002dtransformation-698"></a><br><dt><samp><span class="option">--disable-sec-transformation</span></samp><dd>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. |
| </dl> |
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