gdb/h8300-tdep.c

   1 #include <stdio.h>
   2 #include "defs.h"
   3
   4 /* an easy to debug H8 stack frame looks like:
   5 0x6df2  push    r2
   6 0x6df3  push    r3
   7 0x6df6  push    r6
   8 0x      mov.w   r7,r6
   9         subs    stuff,sp  mov.w #x,r5
  10                           subs  r5,sp
  11
  12  */
  13 #define IS_PUSH(x) ((x & 0xff00)==0x6d00)
  14 CORE_ADDR h8300_skip_prologue(start_pc)
  15 CORE_ADDR start_pc;
  16
  17 {
  18   /* Skip past all push insns */
  19   short int w;
  20
  21   w = read_memory_integer(start_pc, 2);
  22   while (IS_PUSH(w))
  23   {
  24     start_pc+=2;
  25     w = read_memory_integer(start_pc, 2);
  26   }
  27 return start_pc;
  28
  29 }
  30
  31 h8300_pop_frame()
  32 {
  33   printf("pop frame\n");
  34
  35 }
  36
  37 int
  38 print_insn(memaddr, stream)
  39 CORE_ADDR memaddr;
  40 FILE *stream;
  41 {
  42   /* Nothing is bigger than 8 bytes */
  43   char   data[8];
  44   read_memory (memaddr, data, sizeof(data));
  45   return print_insn_h8300(memaddr,  data   , stream);
  46
  47
  48 }
  49
  50
  51
  52      FRAME_CHAIN()
  53      {
  54
  55      printf("Frame chain\n");
  56
  57      }
  58
  59