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 2 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, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #ifndef MIPS_TDEP_H
  23 #define MIPS_TDEP_H
  24
  25 struct gdbarch;
  26
  27 /* All the possible MIPS ABIs. */
  28 enum mips_abi
  29   {
  30     MIPS_ABI_UNKNOWN = 0,
  31     MIPS_ABI_N32,
  32     MIPS_ABI_O32,
  33     MIPS_ABI_N64,
  34     MIPS_ABI_O64,
  35     MIPS_ABI_EABI32,
  36     MIPS_ABI_EABI64,
  37     MIPS_ABI_LAST
  38   };
  39
  40 /* Return the MIPS ABI associated with GDBARCH.  */
  41 enum mips_abi mips_abi (struct gdbarch *gdbarch);
  42
  43 /* Return the MIPS ISA's register size.  Just a short cut to the BFD
  44    architecture's word size.  */
  45 extern int mips_isa_regsize (struct gdbarch *gdbarch);
  46
  47 /* Return the current index for various MIPS registers.  */
  48 struct mips_regnum
  49 {
  50   int pc;
  51   int fp0;
  52   int fp_implementation_revision;
  53   int fp_control_status;
  54   int badvaddr;         /* Bad vaddr for addressing exception.  */
  55   int cause;            /* Describes last exception.  */
  56   int hi;               /* Multiply/divide temp.  */
  57   int lo;               /* ...  */
  58 };
  59 extern const struct mips_regnum *mips_regnum (struct gdbarch *gdbarch);
  60
  61 /* Register numbers of various important registers.  */
  62
  63 enum
  64 {
  65   MIPS_ZERO_REGNUM = 0,         /* Read-only register, always 0.  */
  66   MIPS_AT_REGNUM = 1,
  67   MIPS_V0_REGNUM = 2,           /* Function integer return value.  */
  68   MIPS_A0_REGNUM = 4,           /* Loc of first arg during a subr call */
  69   MIPS_T9_REGNUM = 25,          /* Contains address of callee in PIC.  */
  70   MIPS_SP_REGNUM = 29,
  71   MIPS_RA_REGNUM = 31,
  72   MIPS_PS_REGNUM = 32,          /* Contains processor status.  */
  73   MIPS_EMBED_LO_REGNUM = 33,
  74   MIPS_EMBED_HI_REGNUM = 34,
  75   MIPS_EMBED_BADVADDR_REGNUM = 35,
  76   MIPS_EMBED_CAUSE_REGNUM = 36,
  77   MIPS_EMBED_PC_REGNUM = 37,
  78   MIPS_EMBED_FP0_REGNUM = 38,
  79   MIPS_UNUSED_REGNUM = 73,      /* Never used, FIXME */
  80   MIPS_FIRST_EMBED_REGNUM = 74, /* First CP0 register for embedded use.  */
  81   MIPS_PRID_REGNUM = 89,        /* Processor ID.  */
  82   MIPS_LAST_EMBED_REGNUM = 89   /* Last one.  */
  83 };
  84
  85 /* Defined in mips-tdep.c and used in remote-mips.c */
  86 extern void deprecated_mips_set_processor_regs_hack (void);
  87
  88 /* Instruction sizes and other useful constants.  */
  89 enum
  90 {
  91   MIPS_INSN16_SIZE = 2,
  92   MIPS_INSN32_SIZE = 4,
  93   /* The number of floating-point or integer registers.  */
  94   MIPS_NUMREGS = 32
  95 };
  96
  97 /* Single step based on where the current instruction will take us.  */
  98 extern int mips_software_single_step (struct frame_info *frame);
  99
 100 /* Tell if the program counter value in MEMADDR is in a MIPS16
 101    function.  */
 102 extern int mips_pc_is_mips16 (bfd_vma memaddr);
 103
 104 /* Return the currently configured (or set) saved register size. */
 105 extern unsigned int mips_abi_regsize (struct gdbarch *gdbarch);
 106
 107 #endif /* MIPS_TDEP_H */