[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_r837116560



##########
File path: arch/risc-v/include/syscall.h
##########
@@ -78,6 +79,7 @@
  */
 
 #define SYS_switch_context        (2)
+#endif /* CONFIG_ARCH_USE_S_MODE */

Review comment:
       It is included, riscv_swint.c:
   ```
   
   #endif /* CONFIG_ARCH_USE_S_MODE */
   
   
         /* A0=SYS_syscall_return: This is a SYSCALL return command:
         /* A0=SYS_syscall_return: This is a SYSCALL return command:
          *
          *
          *   void up_sycall_return(void);
          *   void up_sycall_return(void);
          *
          *
          * At this point, the following values are saved in context:
          * At this point, the following values are saved in context:
          *
          *
          *   A0 = SYS_syscall_return
          *   A0 = SYS_syscall_return
          *
          *
          * We need to restore the saved return address and return in
          * We need to restore the saved return address and return in
          * unprivileged thread mode.
          * unprivileged thread mode.
          */
          */
   #ifdef CONFIG_LIB_SYSCALL
   
         case SYS_syscall_return:
   
   ```




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