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| <h4 class="subsection">21.3.2 ARM</h4> |
| |
| <p><span class="sc">gdb</span> provides the following ARM-specific commands: |
| |
| <dl> |
| <dt><code>set arm disassembler</code><dd><a name="index-set-arm-1578"></a>This commands selects from a list of disassembly styles. The |
| <code>"std"</code> style is the standard style. |
| |
| <br><dt><code>show arm disassembler</code><dd><a name="index-show-arm-1579"></a>Show the current disassembly style. |
| |
| <br><dt><code>set arm apcs32</code><dd><a name="index-ARM-32_002dbit-mode-1580"></a>This command toggles ARM operation mode between 32-bit and 26-bit. |
| |
| <br><dt><code>show arm apcs32</code><dd>Display the current usage of the ARM 32-bit mode. |
| |
| <br><dt><code>set arm fpu </code><var>fputype</var><dd>This command sets the ARM floating-point unit (FPU) type. The |
| argument <var>fputype</var> can be one of these: |
| |
| <dl> |
| <dt><code>auto</code><dd>Determine the FPU type by querying the OS ABI. |
| <br><dt><code>softfpa</code><dd>Software FPU, with mixed-endian doubles on little-endian ARM |
| processors. |
| <br><dt><code>fpa</code><dd>GCC-compiled FPA co-processor. |
| <br><dt><code>softvfp</code><dd>Software FPU with pure-endian doubles. |
| <br><dt><code>vfp</code><dd>VFP co-processor. |
| </dl> |
| |
| <br><dt><code>show arm fpu</code><dd>Show the current type of the FPU. |
| |
| <br><dt><code>set arm abi</code><dd>This command forces <span class="sc">gdb</span> to use the specified ABI. |
| |
| <br><dt><code>show arm abi</code><dd>Show the currently used ABI. |
| |
| <br><dt><code>set arm fallback-mode (arm|thumb|auto)</code><dd><span class="sc">gdb</span> uses the symbol table, when available, to determine |
| whether instructions are ARM or Thumb. This command controls |
| <span class="sc">gdb</span>'s default behavior when the symbol table is not |
| available. The default is ‘<samp><span class="samp">auto</span></samp>’, which causes <span class="sc">gdb</span> to |
| use the current execution mode (from the <code>T</code> bit in the <code>CPSR</code> |
| register). |
| |
| <br><dt><code>show arm fallback-mode</code><dd>Show the current fallback instruction mode. |
| |
| <br><dt><code>set arm force-mode (arm|thumb|auto)</code><dd>This command overrides use of the symbol table to determine whether |
| instructions are ARM or Thumb. The default is ‘<samp><span class="samp">auto</span></samp>’, which |
| causes <span class="sc">gdb</span> to use the symbol table and then the setting |
| of ‘<samp><span class="samp">set arm fallback-mode</span></samp>’. |
| |
| <br><dt><code>show arm force-mode</code><dd>Show the current forced instruction mode. |
| |
| <br><dt><code>set debug arm</code><dd>Toggle whether to display ARM-specific debugging messages from the ARM |
| target support subsystem. |
| |
| <br><dt><code>show debug arm</code><dd>Show whether ARM-specific debugging messages are enabled. |
| </dl> |
| |
| <dl> |
| <dt><code>target sim </code><span class="roman">[</span><var>simargs</var><span class="roman">]</span><code> ...</code><dd>The <span class="sc">gdb</span> ARM simulator accepts the following optional arguments. |
| |
| <dl> |
| <dt><code>--swi-support=</code><var>type</var><dd>Tell the simulator which SWI interfaces to support. The argument |
| <var>type</var> may be a comma separated list of the following values. |
| The default value is <code>all</code>. |
| |
| <dl> |
| <dt><code>none</code><br><dt><code>demon</code><br><dt><code>angel</code><br><dt><code>redboot</code><br><dt><code>all</code><dd></dl> |
| </dl> |
| </dl> |
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