[GitHub] [incubator-nuttx] pussuw commented on a change in pull request #5782: RISC-V: Implement option to run NuttX in supervisor mode (S-mode)

[GitBox]

pussuw commented on a change in pull request #5782:
URL: https://github.com/apache/incubator-nuttx/pull/5782#discussion_r838525221



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File path: arch/risc-v/include/syscall.h
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@@ -207,7 +162,15 @@ static inline uintptr_t sys_call0(unsigned int nbr)
 
   asm volatile
     (
+#if defined (CONFIG_ARCH_USE_S_MODE) && defined (__KERNEL__)
+     " addi sp, sp, -16\n"                  /* Make room */
+     " sd   ra, 0(sp)\n"                    /* Save ra */

Review comment:
       Yes that would be the way to do it. Also riscv_swint.c can be refactored 
then. 




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