gdb/hppa-tdep.h

   1 /* Common target dependent code for GDB on HPPA systems.
   2    Copyright 2003 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 #ifndef HPPA_TDEP_H
  22 #define HPPA_TDEP_H
  23
  24 enum { HPPA_INSTRUCTION_SIZE = 4 };
  25
  26 /* Target-dependent structure in gdbarch.  */
  27 struct gdbarch_tdep
  28 {
  29   /* The number of bytes in an address.  For now, this field is designed
  30      to allow us to differentiate hppa32 from hppa64 targets.  */
  31   int bytes_per_address;
  32 };
  33
  34 /*
  35  * Unwind table and descriptor.
  36  */
  37
  38 struct unwind_table_entry
  39   {
  40     CORE_ADDR region_start;
  41     CORE_ADDR region_end;
  42
  43     unsigned int Cannot_unwind:1;       /* 0 */
  44     unsigned int Millicode:1;   /* 1 */
  45     unsigned int Millicode_save_sr0:1;  /* 2 */
  46     unsigned int Region_description:2;  /* 3..4 */
  47     unsigned int reserved1:1;   /* 5 */
  48     unsigned int Entry_SR:1;    /* 6 */
  49     unsigned int Entry_FR:4;    /* number saved *//* 7..10 */
  50     unsigned int Entry_GR:5;    /* number saved *//* 11..15 */
  51     unsigned int Args_stored:1; /* 16 */
  52     unsigned int Variable_Frame:1;      /* 17 */
  53     unsigned int Separate_Package_Body:1;       /* 18 */
  54     unsigned int Frame_Extension_Millicode:1;   /* 19 */
  55     unsigned int Stack_Overflow_Check:1;        /* 20 */
  56     unsigned int Two_Instruction_SP_Increment:1;        /* 21 */
  57     unsigned int Ada_Region:1;  /* 22 */
  58     unsigned int cxx_info:1;    /* 23 */
  59     unsigned int cxx_try_catch:1;       /* 24 */
  60     unsigned int sched_entry_seq:1;     /* 25 */
  61     unsigned int reserved2:1;   /* 26 */
  62     unsigned int Save_SP:1;     /* 27 */
  63     unsigned int Save_RP:1;     /* 28 */
  64     unsigned int Save_MRP_in_frame:1;   /* 29 */
  65     unsigned int extn_ptr_defined:1;    /* 30 */
  66     unsigned int Cleanup_defined:1;     /* 31 */
  67
  68     unsigned int MPE_XL_interrupt_marker:1;     /* 0 */
  69     unsigned int HP_UX_interrupt_marker:1;      /* 1 */
  70     unsigned int Large_frame:1; /* 2 */
  71     unsigned int Pseudo_SP_Set:1;       /* 3 */
  72     unsigned int reserved4:1;   /* 4 */
  73     unsigned int Total_frame_size:27;   /* 5..31 */
  74
  75     /* This is *NOT* part of an actual unwind_descriptor in an object
  76        file.  It is *ONLY* part of the "internalized" descriptors that
  77        we create from those in a file.
  78      */
  79     struct
  80       {
  81         unsigned int stub_type:4;       /* 0..3 */
  82         unsigned int padding:28;        /* 4..31 */
  83       }
  84     stub_unwind;
  85   };
  86
  87 /* HP linkers also generate unwinds for various linker-generated stubs.
  88    GDB reads in the stubs from the $UNWIND_END$ subspace, then
  89    "converts" them into normal unwind entries using some of the reserved
  90    fields to store the stub type.  */
  91
  92 /* The gaps represent linker stubs used in MPE and space for future
  93    expansion.  */
  94 enum unwind_stub_types
  95   {
  96     LONG_BRANCH = 1,
  97     PARAMETER_RELOCATION = 2,
  98     EXPORT = 10,
  99     IMPORT = 11,
 100     IMPORT_SHLIB = 12,
 101   };
 102
 103 /* We use the objfile->obj_private pointer for two things:
 104  * 1.  An unwind table;
 105  *
 106  * 2.  A pointer to any associated shared library object.
 107  *
 108  * #defines are used to help refer to these objects.
 109  */
 110
 111 /* Info about the unwind table associated with an object file.
 112  * This is hung off of the "objfile->obj_private" pointer, and
 113  * is allocated in the objfile's psymbol obstack.  This allows
 114  * us to have unique unwind info for each executable and shared
 115  * library that we are debugging.
 116  */
 117 struct hppa_unwind_info
 118   {
 119     struct unwind_table_entry *table;   /* Pointer to unwind info */
 120     struct unwind_table_entry *cache;   /* Pointer to last entry we found */
 121     int last;                   /* Index of last entry */
 122   };
 123
 124 struct hppa_objfile_private
 125   {
 126     struct hppa_unwind_info *unwind_info;       /* a pointer */
 127     struct so_list *so_info;    /* a pointer  */
 128     CORE_ADDR dp;
 129   };
 130
 131 extern const struct objfile_data *hppa_objfile_priv_data;
 132
 133 #endif  /* HPPA_TDEP_H */