gdb/config/mips/tm-mips.h

   1 /* Definitions to make GDB run on a mips box under 4.3bsd.
   2
   3    Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996,
   4    1997, 1998, 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
   5
   6    Contributed by Per Bothner (bothner@cs.wisc.edu) at U.Wisconsin
   7    and by Alessandro Forin (af@cs.cmu.edu) at CMU..
   8
   9    This file is part of GDB.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 2 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 59 Temple Place - Suite 330,
  24    Boston, MA 02111-1307, USA.  */
  25
  26 #ifndef TM_MIPS_H
  27 #define TM_MIPS_H 1
  28
  29 #define GDB_MULTI_ARCH 1
  30
  31 #include "regcache.h"
  32
  33 struct frame_info;
  34 struct symbol;
  35 struct type;
  36 struct value;
  37
  38 #include <bfd.h>
  39 #include "coff/sym.h"           /* Needed for PDR below.  */
  40 #include "coff/symconst.h"
  41
  42 /* Return non-zero if PC points to an instruction which will cause a step
  43    to execute both the instruction at PC and an instruction at PC+4.  */
  44 extern int mips_step_skips_delay (CORE_ADDR);
  45 #define STEP_SKIPS_DELAY_P (1)
  46 #define STEP_SKIPS_DELAY(pc) (mips_step_skips_delay (pc))
  47
  48 /* Initializer for an array of names for registers 32 and above.
  49    There should be NUM_REGS-32 strings in this initializer.  */
  50
  51 #ifndef MIPS_REGISTER_NAMES
  52 #define MIPS_REGISTER_NAMES     \
  53     {   "sr",   "lo",   "hi",   "bad",  "cause","pc",    \
  54         "f0",   "f1",   "f2",   "f3",   "f4",   "f5",   "f6",   "f7", \
  55         "f8",   "f9",   "f10",  "f11",  "f12",  "f13",  "f14",  "f15", \
  56         "f16",  "f17",  "f18",  "f19",  "f20",  "f21",  "f22",  "f23",\
  57         "f24",  "f25",  "f26",  "f27",  "f28",  "f29",  "f30",  "f31",\
  58         "fsr",  "fir",  ""/*"fp"*/,     "", \
  59         "",     "",     "",     "",     "",     "",     "",     "", \
  60         "",     "",     "",     "",     "",     "",     "",     "", \
  61     }
  62 #endif
  63
  64 /* Register numbers of various important registers.
  65    Note that some of these values are "real" register numbers,
  66    and correspond to the general registers of the machine,
  67    and some are "phony" register numbers which are too large
  68    to be actual register numbers as far as the user is concerned
  69    but do serve to get the desired values when passed to read_register.  */
  70
  71 #define ZERO_REGNUM 0           /* read-only register, always 0 */
  72 #define V0_REGNUM 2             /* Function integer return value */
  73 #define A0_REGNUM 4             /* Loc of first arg during a subr call */
  74 #define T9_REGNUM 25            /* Contains address of callee in PIC */
  75 #define SP_REGNUM 29            /* Contains address of top of stack */
  76 #define RA_REGNUM 31            /* Contains return address value */
  77 #define PS_REGNUM 32            /* Contains processor status */
  78 #define UNUSED_REGNUM 73        /* Never used, FIXME */
  79 #define FIRST_EMBED_REGNUM 74   /* First CP0 register for embedded use */
  80 #define PRID_REGNUM 89          /* Processor ID */
  81 #define LAST_EMBED_REGNUM 89    /* Last one */
  82
  83 /* Special symbol found in blocks associated with routines.  We can hang
  84    mips_extra_func_info_t's off of this.  */
  85
  86 #define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__"
  87 extern void ecoff_relocate_efi (struct symbol *, CORE_ADDR);
  88
  89 /* Specific information about a procedure.
  90    This overlays the MIPS's PDR records,
  91    mipsread.c (ab)uses this to save memory */
  92
  93 typedef struct mips_extra_func_info
  94   {
  95     long numargs;               /* number of args to procedure (was iopt) */
  96     bfd_vma high_addr;          /* upper address bound */
  97     long frame_adjust;          /* offset of FP from SP (used on MIPS16) */
  98     PDR pdr;                    /* Procedure descriptor record */
  99   }
 100  *mips_extra_func_info_t;
 101
 102 /* It takes two values to specify a frame on the MIPS.
 103
 104    In fact, the *PC* is the primary value that sets up a frame.  The
 105    PC is looked up to see what function it's in; symbol information
 106    from that function tells us which register is the frame pointer
 107    base, and what offset from there is the "virtual frame pointer".
 108    (This is usually an offset from SP.)  On most non-MIPS machines,
 109    the primary value is the SP, and the PC, if needed, disambiguates
 110    multiple functions with the same SP.  But on the MIPS we can't do
 111    that since the PC is not stored in the same part of the frame every
 112    time.  This does not seem to be a very clever way to set up frames,
 113    but there is nothing we can do about that.  */
 114
 115 #define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv)
 116 extern struct frame_info *setup_arbitrary_frame (int, CORE_ADDR *);
 117
 118 /* These are defined in mdebugread.c and are used in mips-tdep.c  */
 119 extern CORE_ADDR sigtramp_address, sigtramp_end;
 120 extern void fixup_sigtramp (void);
 121
 122 /* Defined in mips-tdep.c and used in remote-mips.c */
 123 extern char *mips_read_processor_type (void);
 124
 125 /* Functions for dealing with MIPS16 call and return stubs.  */
 126 #define IGNORE_HELPER_CALL(pc)                  mips_ignore_helper (pc)
 127 extern int mips_ignore_helper (CORE_ADDR pc);
 128
 129 /* Definitions and declarations used by mips-tdep.c and remote-mips.c  */
 130 #define MIPS_INSTLEN 4          /* Length of an instruction */
 131 #define MIPS16_INSTLEN 2        /* Length of an instruction on MIPS16 */
 132 #define MIPS_NUMREGS 32         /* Number of integer or float registers */
 133 typedef unsigned long t_inst;   /* Integer big enough to hold an instruction */
 134
 135 #endif /* TM_MIPS_H */
 136
 137 /* Command to set the processor type. */
 138 extern void mips_set_processor_type_command (char *, int);
 139
 140 /* Single step based on where the current instruction will take us.  */
 141 extern void mips_software_single_step (enum target_signal, int);