gdb/m68k-tdep.h - gdb

Data types defined

Macros defined

Source code

  1. /* Target-dependent code for the Motorola 68000 series.

  3.    Copyright (C) 1990-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  7.    This program is free software; you can redistribute it and/or modify
  8.    it under the terms of the GNU General Public License as published by
  9.    the Free Software Foundation; either version 3 of the License, or
  10.    (at your option) any later version.

  12.    This program is distributed in the hope that it will be useful,
  13.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.    GNU General Public License for more details.

  17.    You should have received a copy of the GNU General Public License
  18.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  20. #ifndef M68K_TDEP_H
  21. ‌#define M68K_TDEP_H

  23. struct frame_info;

  25. /* Register numbers of various important registers.  */

  27. ‌enum m68k_regnum
  28. {
  29.   M68K_D0_REGNUM = 0,
  30.   M68K_D1_REGNUM = 1,
  31.   M68K_D2_REGNUM = 2,
  32.   M68K_D7_REGNUM = 7,
  33.   M68K_A0_REGNUM = 8,
  34.   M68K_A1_REGNUM = 9,
  35.   M68K_A2_REGNUM = 10,
  36.   M68K_FP_REGNUM = 14,                /* Address of executing stack frame.  */
  37.   M68K_SP_REGNUM = 15,                /* Address of top of stack.  */
  38.   M68K_PS_REGNUM = 16,                /* Processor status.  */
  39.   M68K_PC_REGNUM = 17,                /* Program counter.  */
  40.   M68K_FP0_REGNUM = 18,                /* Floating point register 0.  */
  41.   M68K_FPC_REGNUM = 26,                /* 68881 control register.  */
  42.   M68K_FPS_REGNUM = 27,                /* 68881 status register.  */
  43.   M68K_FPI_REGNUM = 28
  44. };

  46. /* Number of machine registers.  */
  47. ‌#define M68K_NUM_REGS        (M68K_FPI_REGNUM + 1)

  49. /* Size of the largest register.  */
  50. ‌#define M68K_MAX_REGISTER_SIZE        12

  52. /* Convention for returning structures.  */

  54. ‌enum struct_return
  55. {
  56.   pcc_struct_return,                /* Return "short" structures in memory.  */
  57.   reg_struct_return                /* Return "short" structures in registers.  */
  58. };

  60. /* Particular flavour of m68k.  */
  61. ‌enum m68k_flavour
  62.   {
  63.     m68k_no_flavour,
  64.     m68k_coldfire_flavour,
  65.     m68k_fido_flavour
  66.   };

  68. /* Target-dependent structure in gdbarch.  */

  70. ‌struct gdbarch_tdep
  71. {
  72.   /* Offset to PC value in the jump buffer.  If this is negative,
  73.      longjmp support will be disabled.  */
  74.   int jb_pc;
  75.   /* The size of each entry in the jump buffer.  */
  76.   size_t jb_elt_size;

  78.   /* Register in which the address to store a structure value is
  79.      passed to a function.  */
  80.   int struct_value_regnum;

  82.   /* Convention for returning structures.  */
  83.   enum struct_return struct_return;

  85.   /* Convention for returning floats.  zero in int regs, non-zero in float.  */
  86.   int float_return;

  88.   /* The particular flavour of m68k.  */
  89.   enum m68k_flavour flavour;

  91.   /* Flag set if the floating point registers are present, or assumed
  92.      to be present.  */
  93.   int fpregs_present;

  95.    /* ISA-specific data types.  */
  96.   struct type *m68k_ps_type;
  97.   struct type *m68881_ext_type;
  98. };

  100. /* Initialize a SVR4 architecture variant.  */
  101. extern void m68k_svr4_init_abi (struct gdbarch_info, struct gdbarch *);


  104. /* Functions exported from m68kbsd-tdep.c.  */

  106. extern int m68kbsd_fpreg_offset (struct gdbarch *gdbarch, int regnum);

  108. #endif /* m68k-tdep.h */