HI!<br>
I&#39;m always trying to build l4 for mips64. I&#39;ve decided to try to
correct errors i obtain during the compilation. I&#39;ve repaired some of
them but now I&#39;m stuck.<br>
I think I&#39;ve understand the problem, but I don&#39;t know how to solve it.<br>
When compiling, I got this error :<br>
<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc: In function
`threadid_t sys_exchange_registers(threadid_t, word_t, word_t, word_t,
word_t, word_t, threadid_t, bool)&#39;:<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:333: error: data type of &#39;pgr&#39; isn&#39;t suitable for a register<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:333: error: register name given for non-register variable &#39;pgr&#39;<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:333: confused by earlier errors, bailing out<br>
make[1]: *** [src/api/v4/exregs.o] Error 1<br>
<br>
I&#39;ve found in syscall.h where this function is declared. I got this code :<br>
<br>
#define return_exchange_registers(result, control, sp, ip, flags, pager, handle)&nbsp;&nbsp;&nbsp; \<br>
{&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; register word_t ctrl asm(&quot;$4&quot;) = control;&nbsp;&nbsp;&nbsp; /* a0 */&nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; register word_t sp_r asm(&quot;$5&quot;) = sp;&nbsp;&nbsp;&nbsp; /* a1 */&nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; register word_t ip_r asm(&quot;$6&quot;) = ip;&nbsp;&nbsp;&nbsp; /* a2 */&nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; register word_t flg asm(&quot;$7&quot;) = flags;&nbsp;&nbsp;&nbsp; /* a3 */&nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; register threadid_t pgr asm(&quot;$8&quot;) = pager;&nbsp;&nbsp;&nbsp; /* t0 */&nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; register word_t hdl asm(&quot;$9&quot;) = handle;&nbsp;&nbsp;&nbsp; /* t1 */&nbsp;&nbsp;&nbsp; \<br>
\<br>
&nbsp;&nbsp;&nbsp; __asm__ __volatile__ (&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; &quot;&quot; : : &quot;r&quot; (ctrl), &quot;r&quot; (sp_r), &quot;r&quot; (ip_r),&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; &quot;r&quot; (flg), &quot;r&quot; (pgr), &quot;r&quot; (hdl)&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; );&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \<br>
&nbsp;&nbsp;&nbsp; return (result);&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \<br>
}<br>
<br>
I think that it&#39;s impossible to store a threadid_t in a register so i
tried to cast it to word_t but after i got this error message :<br>
<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc: In function
`threadid_t sys_exchange_registers(threadid_t, word_t, word_t, word_t,
word_t, word_t, threadid_t, bool)&#39;:<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:333: error: expected primary-expression before &quot;register&quot;<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:333: error: expected `;&#39; before &quot;register&quot;<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:333: error: `pgr&#39; undeclared (first use this function)<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:333: error:
(Each undeclared identifier is reported only once for each function it
appears in.)<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:352: error: expected primary-expression before &quot;register&quot;<br>
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:352: error: expected `;&#39; before &quot;register&quot;<br>
make[1]: *** [src/api/v4/exregs.o] Error 1<br>
<br>
Maybe my idea is not good or I haven&#39;t really understand the problem.<br>
Any ideas?<br>
Thanks<br>
Antoine