gdb/mips-tdep.h

   1 /* Target-dependent header for the MIPS architecture, for GDB, the GNU Debugger.
   2
   3    Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   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.
  11
  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.
  16
  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/>.  */
  19
  20 #ifndef MIPS_TDEP_H
  21 #define MIPS_TDEP_H
  22
  23 struct gdbarch;
  24
  25 /* All the possible MIPS ABIs. */
  26 enum mips_abi
  27   {
  28     MIPS_ABI_UNKNOWN = 0,
  29     MIPS_ABI_N32,
  30     MIPS_ABI_O32,
  31     MIPS_ABI_N64,
  32     MIPS_ABI_O64,
  33     MIPS_ABI_EABI32,
  34     MIPS_ABI_EABI64,
  35     MIPS_ABI_LAST
  36   };
  37
  38 /* Return the MIPS ABI associated with GDBARCH.  */
  39 enum mips_abi mips_abi (struct gdbarch *gdbarch);
  40
  41 /* Return the MIPS ISA's register size.  Just a short cut to the BFD
  42    architecture's word size.  */
  43 extern int mips_isa_regsize (struct gdbarch *gdbarch);
  44
  45 /* Return the current index for various MIPS registers.  */
  46 struct mips_regnum
  47 {
  48   int pc;
  49   int fp0;
  50   int fp_implementation_revision;
  51   int fp_control_status;
  52   int badvaddr;         /* Bad vaddr for addressing exception.  */
  53   int cause;            /* Describes last exception.  */
  54   int hi;               /* Multiply/divide temp.  */
  55   int lo;               /* ...  */
  56 };
  57 extern const struct mips_regnum *mips_regnum (struct gdbarch *gdbarch);
  58
  59 /* Register numbers of various important registers.  */
  60
  61 enum
  62 {
  63   MIPS_ZERO_REGNUM = 0,         /* Read-only register, always 0.  */
  64   MIPS_AT_REGNUM = 1,
  65   MIPS_V0_REGNUM = 2,           /* Function integer return value.  */
  66   MIPS_A0_REGNUM = 4,           /* Loc of first arg during a subr call */
  67   MIPS_T9_REGNUM = 25,          /* Contains address of callee in PIC.  */
  68   MIPS_SP_REGNUM = 29,
  69   MIPS_RA_REGNUM = 31,
  70   MIPS_PS_REGNUM = 32,          /* Contains processor status.  */
  71   MIPS_EMBED_LO_REGNUM = 33,
  72   MIPS_EMBED_HI_REGNUM = 34,
  73   MIPS_EMBED_BADVADDR_REGNUM = 35,
  74   MIPS_EMBED_CAUSE_REGNUM = 36,
  75   MIPS_EMBED_PC_REGNUM = 37,
  76   MIPS_EMBED_FP0_REGNUM = 38,
  77   MIPS_UNUSED_REGNUM = 73,      /* Never used, FIXME */
  78   MIPS_FIRST_EMBED_REGNUM = 74, /* First CP0 register for embedded use.  */
  79   MIPS_PRID_REGNUM = 89,        /* Processor ID.  */
  80   MIPS_LAST_EMBED_REGNUM = 89   /* Last one.  */
  81 };
  82
  83 /* Defined in mips-tdep.c and used in remote-mips.c */
  84 extern void deprecated_mips_set_processor_regs_hack (void);
  85
  86 /* Instruction sizes and other useful constants.  */
  87 enum
  88 {
  89   MIPS_INSN16_SIZE = 2,
  90   MIPS_INSN32_SIZE = 4,
  91   /* The number of floating-point or integer registers.  */
  92   MIPS_NUMREGS = 32
  93 };
  94
  95 /* Single step based on where the current instruction will take us.  */
  96 extern int mips_software_single_step (struct frame_info *frame);
  97
  98 /* Tell if the program counter value in MEMADDR is in a MIPS16
  99    function.  */
 100 extern int mips_pc_is_mips16 (bfd_vma memaddr);
 101
 102 /* Return the currently configured (or set) saved register size. */
 103 extern unsigned int mips_abi_regsize (struct gdbarch *gdbarch);
 104
 105 #endif /* MIPS_TDEP_H */