armv6: bop_panic should hexdump the stack
It's the little things that make debugging easier.

*** 32,41 ****
--- 32,42 ----
  #include <sys/bootstat.h>
  #include <sys/privregs.h>
  #include <sys/cpu_asm.h>
  #include <sys/boot_mmu.h>
  #include <sys/elf.h>
+ #include <sys/archsystm.h>
  
  static bootops_t bootop;
  
  /*
   * Debugging help
*** 111,124 ****
          char *bp_value;
  } bootprop_t;
  
  static bootprop_t *bprops = NULL;
  
  void
  bop_panic(const char *msg)
  {
!         bop_printf(NULL, "ARM bop_panic:\n%s\nSpinning Forever...", msg);
          for (;;)
                  ;
  }
  
  /*
--- 112,156 ----
          char *bp_value;
  } bootprop_t;
  
  static bootprop_t *bprops = NULL;
  
+ static void
+ hexdump_stack()
+ {
+         extern char t0stack[];
+ 
+         uint8_t *start = (uint8_t *)t0stack;
+         uint8_t *end = start + DEFAULTSTKSZ;
+         uint8_t *ptr;
+         int i;
+ 
+         bop_printf(NULL, "stack (fp = %x):\n", getfp());
+ 
+         ptr = (uint8_t *)(getfp() & ~0xf);
+         if (ptr <= start || ptr >= end)
+                 ptr = start;
+ 
+         while (ptr < end) {
+                 uint32_t *tmp = (uint32_t *)ptr;
+ 
+                 bop_printf(NULL, "%p: %08x %08x %08x %08x\n", ptr,
+                     tmp[0], tmp[1], tmp[2], tmp[3]);
+ 
+                 ptr += 16;
+         }
+ 
+ }
+ 
  void
  bop_panic(const char *msg)
  {
!         bop_printf(NULL, "ARM bop_panic:\n%s\n", msg);
! 
!         hexdump_stack();
! 
!         bop_printf(NULL, "Spinning Forever...", msg);
          for (;;)
                  ;
  }
  
  /*