Problems with installing Nios2 Linux

Hi,

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In entry.h, it seems normal

#ifdef CONFIG_MMU
    rdctl    r24,estatus

I wonder if there could be something wrong with my toolchain? I use the pre-built toolchain and I first didn't include `nios2-linux/toolchain-mmu/x86-linux2/bin`

If I do include the aforementioned path then I get a different error.

I installed the pre-built toolchain in `opt/nios2/bin`

in entry.h the wrctl instruction is just

wrctl    estatus,r24

Any idea what I could do to make it build cleanly?

My PATH is

echo $PATH
/usr/bin:/home/developer/eclipse/java-neon/eclipse:/home/developer/altera/nios2-linux/toolchain-mmu/x86-linux2/bin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/developer/Downloads/NuSMV-2.6.0-Linux/bin:/snap/bin:/opt/nios2/bin

I also installed gcc 4.2 with the multilib for 4.2. I think I did everything right, still it won't build.

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The message

/home/developer/altera/nios2-linux/linux-2.6/arch/nios2/kernel/entry.S:138: Error: expecting control register

is made in the function

/* The function consume_arg takes a pointer into a string
   of instruction tokens (args) and a pointer into a string
   representing the expected sequence of tokens and separators.
   It checks whether the first argument in argStr is of the
   expected type, throwing an error if it is not, and returns
   the pointer argStr.  */
char *
nios2_consume_arg (char *argStr, const char *argType)
{
  char *temp;
  int regno = -1;
  
  switch (*argType)
    {
    case 'c':
      if (strncmp (argStr, "ctl", strlen ("ctl")) != 0
      && strncmp (argStr, "cpuid", strlen ("cpuid")) != 0
      && strncmp (argStr, "status", strlen ("status")) != 0
      && strncmp (argStr, "estatus", strlen ("estatus")) != 0
      && strncmp (argStr, "bstatus", strlen ("bstatus")) != 0
      && strncmp (argStr, "ienable", strlen ("ienable")) != 0
      && strncmp (argStr, "ipending", strlen ("ipending")) != 0
      && strncmp (argStr, "exception", strlen ("exception")) != 0
      && strncmp (argStr, "pteaddr", strlen ("pteaddr")) != 0
      && strncmp (argStr, "tlbacc", strlen ("tlbacc")) != 0
      && strncmp (argStr, "tlbmisc", strlen ("tlbmisc")) != 0
      && strncmp (argStr, "fstatus", strlen ("fstatus")) != 0
      && strncmp (argStr, "config", strlen ("config")) != 0
      && strncmp (argStr, "mpubase", strlen ("mpubase")) != 0
      && strncmp (argStr, "mpuacc", strlen ("mpuacc")) != 0
      && strncmp (argStr, "badaddr", strlen ("badaddr")) != 0)
    {
      as_bad (_("expecting control register"));
    }
      break;

of file "tc-nios2.c". So I think that you are calling the genuine nios2's 'gas'.

Please try to compile the 'entry.S' only, by evoking the 'nios2-***-gcc' or 'nios2-***-as' directly ?

Kazu