gdb/config/mcore/tm-mcore.h

   1 /* Parameters for execution on a Motorola MCore.
   2    Copyright 1995, 1999, 2000 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA. */
  20
  21 #include "regcache.h"
  22
  23 /* The mcore is little endian (by default) */
  24 #define TARGET_BYTE_ORDER_DEFAULT BFD_ENDIAN_LITTLE
  25
  26 /* All registers are 32 bits */
  27 #define REGISTER_SIZE 4
  28 #define MAX_REGISTER_RAW_SIZE 4
  29
  30 #define REGISTER_VIRTUAL_TYPE(REG) builtin_type_int
  31
  32 #define REGISTER_BYTE(REG) ((REG) * REGISTER_SIZE)
  33 #define REGISTER_VIRTUAL_SIZE(REG) 4
  34 #define REGISTER_RAW_SIZE(REG) 4
  35
  36 #define MAX_REGISTER_VIRTUAL_SIZE 4
  37
  38 #define REGISTER_BYTES (NUM_REGS * REGISTER_SIZE)
  39
  40 extern char *mcore_register_names[];
  41 #define REGISTER_NAME(I) mcore_register_names[I]
  42
  43 /* Registers. The Motorola MCore contains:
  44
  45    16 32-bit general purpose registers (r0-r15)
  46    16 32-bit alternate file registers (ar0-ar15)
  47    32 32-bit control registers (cr0-cr31)
  48    + 1 pc
  49    ------
  50    65 registers */
  51 #define NUM_REGS 65
  52 #define PC_REGNUM 64
  53 #define SP_REGNUM 0
  54 #define FP_REGNUM (SP_REGNUM)
  55 #define PR_REGNUM 15
  56 #define FIRST_ARGREG 2
  57 #define LAST_ARGREG 7
  58 #define RETVAL_REGNUM 2
  59
  60 /* Offset from address of function to start of its code.
  61    Zero on most machines.  */
  62 #define FUNCTION_START_OFFSET 0
  63
  64 #define DECR_PC_AFTER_BREAK 0
  65
  66 /* BREAKPOINT_FROM_PC uses the program counter value to determine
  67    the breakpoint that should be used. */
  68 extern breakpoint_from_pc_fn mcore_breakpoint_from_pc;
  69 #define BREAKPOINT_FROM_PC(PCPTR, LENPTR) mcore_breakpoint_from_pc (PCPTR, LENPTR)
  70
  71 #define INNER_THAN(LHS,RHS) ((LHS) < (RHS))
  72
  73 #define SAVED_PC_AFTER_CALL(FRAME)  read_register (PR_REGNUM)
  74
  75 struct frame_info;
  76 struct type;
  77 struct value;
  78
  79 extern void mcore_init_extra_frame_info (struct frame_info *fi);
  80 #define INIT_EXTRA_FRAME_INFO(FROMLEAF, FI) mcore_init_extra_frame_info ((FI))
  81 #define INIT_FRAME_PC           /* Not necessary */
  82 #define FRAME_INIT_SAVED_REGS(FI)       /* handled by init_extra_frame_info */
  83
  84 extern CORE_ADDR mcore_frame_chain (struct frame_info *fi);
  85 #define FRAME_CHAIN(FI) mcore_frame_chain ((FI))
  86 #define FRAME_CHAIN_VALID(FP, FI) generic_file_frame_chain_valid ((FP), (FI))
  87
  88 extern CORE_ADDR mcore_frame_saved_pc (struct frame_info *);
  89 #define FRAME_SAVED_PC(FI) (mcore_frame_saved_pc ((FI)))
  90
  91 /* Extracting/storing return values. */
  92 extern void mcore_store_return_value (struct type *type, char *valbuf);
  93 #define STORE_RETURN_VALUE(TYPE, VALBUF) mcore_store_return_value ((TYPE), (VALBUF))
  94
  95 extern void mcore_extract_return_value (struct type *type, char *regbut, char *valbuf);
  96 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
  97     mcore_extract_return_value ((TYPE), (REGBUF), (VALBUF));
  98
  99 #define STORE_STRUCT_RETURN(ADDR, SP)   /* handled by mcore_push_arguments */
 100
 101 extern CORE_ADDR mcore_extract_struct_value_address (char *regbuf);
 102 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
 103     mcore_extract_struct_value_address (REGBUF)
 104
 105 extern CORE_ADDR mcore_skip_prologue (CORE_ADDR pc);
 106 #define SKIP_PROLOGUE(PC) mcore_skip_prologue (PC)
 107
 108 #define FRAME_ARGS_SKIP 0
 109 extern CORE_ADDR mcore_frame_args_address (struct frame_info *fi);
 110 #define FRAME_ARGS_ADDRESS(FI) mcore_frame_args_address ((FI))
 111 extern CORE_ADDR mcore_frame_locals_address (struct frame_info *fi);
 112 #define FRAME_LOCALS_ADDRESS(FI) mcore_frame_locals_address ((FI))
 113 #define FRAME_NUM_ARGS(FI) (-1)
 114
 115
 116 extern void mcore_pop_frame (struct frame_info *fi);
 117 #define POP_FRAME mcore_pop_frame (get_current_frame ())
 118
 119 #define USE_GENERIC_DUMMY_FRAMES 1
 120 #define CALL_DUMMY                   {0}
 121 #define CALL_DUMMY_START_OFFSET      (0)
 122 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
 123 #define CALL_DUMMY_LOCATION          AT_ENTRY_POINT
 124 #define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP)
 125 #define CALL_DUMMY_ADDRESS()         entry_point_address ()
 126 #define SIZEOF_CALL_DUMMY_WORDS      0
 127 #define SAVE_DUMMY_FRAME_TOS(SP)     generic_save_dummy_frame_tos (SP)
 128
 129 extern CORE_ADDR mcore_push_return_address (CORE_ADDR, CORE_ADDR);
 130 #define PUSH_RETURN_ADDRESS(PC, SP)  mcore_push_return_address (PC, SP)
 131
 132 #define PUSH_DUMMY_FRAME        generic_push_dummy_frame ()
 133
 134 extern CORE_ADDR mcore_push_arguments (int, struct value **, CORE_ADDR,
 135                                        unsigned char, CORE_ADDR);
 136 #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
 137   (SP) = mcore_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)
 138
 139 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
 140
 141 /* MCore will never pass a sturcture by reference. It will always be split
 142    between registers and stack. */
 143 #define REG_STRUCT_HAS_ADDR(GCC_P, TYPE) 0
 144
 145 extern use_struct_convention_fn mcore_use_struct_convention;
 146 #define USE_STRUCT_CONVENTION(GCC_P, TYPE) mcore_use_struct_convention (GCC_P, TYPE)
 147
 148 /* override the default get_saved_register function with
 149    one that takes account of generic CALL_DUMMY frames */
 150 #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
 151     generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
 152
 153 /* Cons up virtual frame pointer for trace */
 154 extern void mcore_virtual_frame_pointer (CORE_ADDR, int *, LONGEST *);
 155 #define TARGET_VIRTUAL_FRAME_POINTER(PC, REGP, OFFP) \
 156         mcore_virtual_frame_pointer ((PC), (REGP), (OFFP))
 157
 158 /* MCore can be bi-endian. */
 159 #define TARGET_BYTE_ORDER_SELECTABLE_P 1
 160
 161 /* For PE, gcc will tell us what th real type of
 162    arguments are when it promotes arguments. */
 163 #define BELIEVE_PCC_PROMOTION 1