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+syscall
+
+---
+
+To refactor `linux-user/mips/cpu_loop.c` to handle your custom syscall more effectively, you can introduce a MIPS-specific base number similar to how ARM handles it with `ARM_NR_BASE`. Here's a suggestion on how you could modify the code:
+
+1. **Define a Base Number:**
+   First, define a constant for the MIPS base number in your file.
+
+   ```c
+   #define MIPS_SYS_NR_BASE 4000
+   ```
+
+2. **Modify Syscall Handling Logic:**
+
+   Update the logic that determines if the syscall is supported by using this base number:
+
+   ```c
+   int syscall_num = env->active_tc.gpr[2] - MIPS_SYS_NR_BASE;
+   if (syscall_num >= sizeof(mips_syscall_args) / sizeof(struct mips_syscall_args_entry)) {
+     ret = -TARGET_ENOSYS;
+   } else {
+     // Handle the syscall using mips_syscall_args[syscall_num]
+   }
+   ```
+
+3. **Ensure Proper Array Size Calculation:**
+
+   When checking the size of `mips_syscall_args`, use the correct calculation to determine the number of entries:
+
+   ```c
+   sizeof(mips_syscall_args) / sizeof(struct mips_syscall_args_entry)
+   ```
+
+By introducing `MIPS_SYS_NR_BASE`, you make the code more maintainable and consistent with ARM's approach, which should help in correctly handling your custom syscall.
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