gdb/config/pa/tm-hppa.h

   1 /* Parameters for execution on any Hewlett-Packard PA-RISC machine.
   2
   3    Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
   4    1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
   5    Foundation, Inc.
   6
   7    Contributed by the Center for Software Science at the
   8    University of Utah (pa-gdb-bugs@cs.utah.edu).
   9
  10    This file is part of GDB.
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 2 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 59 Temple Place - Suite 330,
  25    Boston, MA 02111-1307, USA.  */
  26
  27 #include "regcache.h"
  28
  29 #define GDB_MULTI_ARCH 1
  30
  31 /* Hack, get around problem with including "arch-utils.h".  */
  32 struct frame_info;
  33
  34 /* Forward declarations of some types we use in prototypes */
  35
  36 struct frame_info;
  37 struct frame_saved_regs;
  38 struct value;
  39 struct type;
  40 struct inferior_status;
  41
  42 /* Sequence of bytes for breakpoint instruction.  */
  43
  44 const unsigned char *hppa_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr);
  45 #define BREAKPOINT_FROM_PC(PCPTR,LENPTR) hppa_breakpoint_from_pc ((PCPTR), (LENPTR))
  46 #define BREAKPOINT32 0x10004
  47
  48 extern int hppa_pc_requires_run_before_use (CORE_ADDR pc);
  49 #define PC_REQUIRES_RUN_BEFORE_USE(pc) hppa_pc_requires_run_before_use (pc)
  50
  51 /* Register numbers of various important registers.
  52    Note that some of these values are "real" register numbers,
  53    and correspond to the general registers of the machine,
  54    and some are "phony" register numbers which are too large
  55    to be actual register numbers as far as the user is concerned
  56    but do serve to get the desired values when passed to read_register.  */
  57
  58 #define R0_REGNUM 0             /* Doesn't actually exist, used as base for
  59                                    other r registers.  */
  60 #define FLAGS_REGNUM 0          /* Various status flags */
  61 #define RP_REGNUM 2             /* return pointer */
  62 #define HPPA_FP_REGNUM 3        /* The ABI's frame pointer, when used */
  63 #define HPPA_SP_REGNUM 30       /* Stack pointer.  */
  64 #define SAR_REGNUM 32           /* Shift Amount Register */
  65 #define IPSW_REGNUM 41          /* Interrupt Processor Status Word */
  66 #define PCOQ_HEAD_REGNUM 33     /* instruction offset queue head */
  67 #define PCSQ_HEAD_REGNUM 34     /* instruction space queue head */
  68 #define PCOQ_TAIL_REGNUM 35     /* instruction offset queue tail */
  69 #define PCSQ_TAIL_REGNUM 36     /* instruction space queue tail */
  70 #define EIEM_REGNUM 37          /* External Interrupt Enable Mask */
  71 #define IIR_REGNUM 38           /* Interrupt Instruction Register */
  72 #define IOR_REGNUM 40           /* Interrupt Offset Register */
  73 #define SR4_REGNUM 43           /* space register 4 */
  74 #define RCR_REGNUM 51           /* Recover Counter (also known as cr0) */
  75 #define CCR_REGNUM 54           /* Coprocessor Configuration Register */
  76 #define TR0_REGNUM 57           /* Temporary Registers (cr24 -> cr31) */
  77 #define CR27_REGNUM 60          /* Base register for thread-local storage, cr27 */
  78 #define HPPA_FP0_REGNUM 64      /* First floating-point.  */
  79 #define FP4_REGNUM 72
  80
  81 #define ARG0_REGNUM 26          /* The first argument of a callee. */
  82 #define ARG1_REGNUM 25          /* The second argument of a callee. */
  83 #define ARG2_REGNUM 24          /* The third argument of a callee. */
  84 #define ARG3_REGNUM 23          /* The fourth argument of a callee. */
  85
  86 /* When fetching register values from an inferior or a core file,
  87    clean them up using this macro.  BUF is a char pointer to
  88    the raw value of the register in the registers[] array.  */
  89
  90 #define DEPRECATED_CLEAN_UP_REGISTER_VALUE(regno, buf) \
  91   do {  \
  92     if ((regno) == PCOQ_HEAD_REGNUM || (regno) == PCOQ_TAIL_REGNUM) \
  93       (buf)[sizeof(CORE_ADDR) -1] &= ~0x3; \
  94   } while (0)
  95
  96 /* PA specific macro to see if the current instruction is nullified. */
  97 #ifndef INSTRUCTION_NULLIFIED
  98 extern int hppa_instruction_nullified (void);
  99 #define INSTRUCTION_NULLIFIED hppa_instruction_nullified ()
 100 #endif
 101
 102 #define INSTRUCTION_SIZE 4
 103
 104 #define REG_PARM_STACK_SPACE 16
 105
 106 #define GDB_TARGET_IS_HPPA
 107
 108 /*
 109  * Unwind table and descriptor.
 110  */
 111
 112 struct unwind_table_entry
 113   {
 114     CORE_ADDR region_start;
 115     CORE_ADDR region_end;
 116
 117     unsigned int Cannot_unwind:1;       /* 0 */
 118     unsigned int Millicode:1;   /* 1 */
 119     unsigned int Millicode_save_sr0:1;  /* 2 */
 120     unsigned int Region_description:2;  /* 3..4 */
 121     unsigned int reserved1:1;   /* 5 */
 122     unsigned int Entry_SR:1;    /* 6 */
 123     unsigned int Entry_FR:4;    /* number saved *//* 7..10 */
 124     unsigned int Entry_GR:5;    /* number saved *//* 11..15 */
 125     unsigned int Args_stored:1; /* 16 */
 126     unsigned int Variable_Frame:1;      /* 17 */
 127     unsigned int Separate_Package_Body:1;       /* 18 */
 128     unsigned int Frame_Extension_Millicode:1;   /* 19 */
 129     unsigned int Stack_Overflow_Check:1;        /* 20 */
 130     unsigned int Two_Instruction_SP_Increment:1;        /* 21 */
 131     unsigned int Ada_Region:1;  /* 22 */
 132     unsigned int cxx_info:1;    /* 23 */
 133     unsigned int cxx_try_catch:1;       /* 24 */
 134     unsigned int sched_entry_seq:1;     /* 25 */
 135     unsigned int reserved2:1;   /* 26 */
 136     unsigned int Save_SP:1;     /* 27 */
 137     unsigned int Save_RP:1;     /* 28 */
 138     unsigned int Save_MRP_in_frame:1;   /* 29 */
 139     unsigned int extn_ptr_defined:1;    /* 30 */
 140     unsigned int Cleanup_defined:1;     /* 31 */
 141
 142     unsigned int MPE_XL_interrupt_marker:1;     /* 0 */
 143     unsigned int HP_UX_interrupt_marker:1;      /* 1 */
 144     unsigned int Large_frame:1; /* 2 */
 145     unsigned int Pseudo_SP_Set:1;       /* 3 */
 146     unsigned int reserved4:1;   /* 4 */
 147     unsigned int Total_frame_size:27;   /* 5..31 */
 148
 149     /* This is *NOT* part of an actual unwind_descriptor in an object
 150        file.  It is *ONLY* part of the "internalized" descriptors that
 151        we create from those in a file.
 152      */
 153     struct
 154       {
 155         unsigned int stub_type:4;       /* 0..3 */
 156         unsigned int padding:28;        /* 4..31 */
 157       }
 158     stub_unwind;
 159   };
 160
 161 /* HP linkers also generate unwinds for various linker-generated stubs.
 162    GDB reads in the stubs from the $UNWIND_END$ subspace, then
 163    "converts" them into normal unwind entries using some of the reserved
 164    fields to store the stub type.  */
 165
 166 /* The gaps represent linker stubs used in MPE and space for future
 167    expansion.  */
 168 enum unwind_stub_types
 169   {
 170     LONG_BRANCH = 1,
 171     PARAMETER_RELOCATION = 2,
 172     EXPORT = 10,
 173     IMPORT = 11,
 174     IMPORT_SHLIB = 12,
 175   };
 176
 177 /* We use the objfile->obj_private pointer for two things:
 178
 179  * 1.  An unwind table;
 180  *
 181  * 2.  A pointer to any associated shared library object.
 182  *
 183  * #defines are used to help refer to these objects.
 184  */
 185
 186 /* Info about the unwind table associated with an object file.
 187
 188  * This is hung off of the "objfile->obj_private" pointer, and
 189  * is allocated in the objfile's psymbol obstack.  This allows
 190  * us to have unique unwind info for each executable and shared
 191  * library that we are debugging.
 192  */
 193 struct obj_unwind_info
 194   {
 195     struct unwind_table_entry *table;   /* Pointer to unwind info */
 196     struct unwind_table_entry *cache;   /* Pointer to last entry we found */
 197     int last;                   /* Index of last entry */
 198   };
 199
 200 typedef struct obj_private_struct
 201   {
 202     struct obj_unwind_info *unwind_info;        /* a pointer */
 203     struct so_list *so_info;    /* a pointer  */
 204     CORE_ADDR dp;
 205   }
 206 obj_private_data_t;
 207
 208 /* For a number of horrible reasons we may have to adjust the location
 209    of variables on the stack.  Ugh.  */
 210 #define HPREAD_ADJUST_STACK_ADDRESS(ADDR) hpread_adjust_stack_address(ADDR)
 211 extern int hpread_adjust_stack_address (CORE_ADDR);
 212
 213 /* Here's how to step off a permanent breakpoint.  */
 214 #define SKIP_PERMANENT_BREAKPOINT (hppa_skip_permanent_breakpoint)
 215 extern void hppa_skip_permanent_breakpoint (void);
 216
 217 /* On HP-UX, certain system routines (millicode) have names beginning
 218    with $ or $$, e.g. $$dyncall, which handles inter-space procedure
 219    calls on PA-RISC.  Tell the expression parser to check for those
 220    when parsing tokens that begin with "$".  */
 221 #define SYMBOLS_CAN_START_WITH_DOLLAR (1)