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   /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux
  34      system.  */
  35   int is_elf;
  36 };
  37
  38 /*
  39  * Unwind table and descriptor.
  40  */
  41
  42 struct unwind_table_entry
  43   {
  44     CORE_ADDR region_start;
  45     CORE_ADDR region_end;
  46
  47     unsigned int Cannot_unwind:1;       /* 0 */
  48     unsigned int Millicode:1;   /* 1 */
  49     unsigned int Millicode_save_sr0:1;  /* 2 */
  50     unsigned int Region_description:2;  /* 3..4 */
  51     unsigned int reserved1:1;   /* 5 */
  52     unsigned int Entry_SR:1;    /* 6 */
  53     unsigned int Entry_FR:4;    /* number saved *//* 7..10 */
  54     unsigned int Entry_GR:5;    /* number saved *//* 11..15 */
  55     unsigned int Args_stored:1; /* 16 */
  56     unsigned int Variable_Frame:1;      /* 17 */
  57     unsigned int Separate_Package_Body:1;       /* 18 */
  58     unsigned int Frame_Extension_Millicode:1;   /* 19 */
  59     unsigned int Stack_Overflow_Check:1;        /* 20 */
  60     unsigned int Two_Instruction_SP_Increment:1;        /* 21 */
  61     unsigned int Ada_Region:1;  /* 22 */
  62     unsigned int cxx_info:1;    /* 23 */
  63     unsigned int cxx_try_catch:1;       /* 24 */
  64     unsigned int sched_entry_seq:1;     /* 25 */
  65     unsigned int reserved2:1;   /* 26 */
  66     unsigned int Save_SP:1;     /* 27 */
  67     unsigned int Save_RP:1;     /* 28 */
  68     unsigned int Save_MRP_in_frame:1;   /* 29 */
  69     unsigned int extn_ptr_defined:1;    /* 30 */
  70     unsigned int Cleanup_defined:1;     /* 31 */
  71
  72     unsigned int MPE_XL_interrupt_marker:1;     /* 0 */
  73     unsigned int HP_UX_interrupt_marker:1;      /* 1 */
  74     unsigned int Large_frame:1; /* 2 */
  75     unsigned int Pseudo_SP_Set:1;       /* 3 */
  76     unsigned int reserved4:1;   /* 4 */
  77     unsigned int Total_frame_size:27;   /* 5..31 */
  78
  79     /* This is *NOT* part of an actual unwind_descriptor in an object
  80        file.  It is *ONLY* part of the "internalized" descriptors that
  81        we create from those in a file.
  82      */
  83     struct
  84       {
  85         unsigned int stub_type:4;       /* 0..3 */
  86         unsigned int padding:28;        /* 4..31 */
  87       }
  88     stub_unwind;
  89   };
  90
  91 /* HP linkers also generate unwinds for various linker-generated stubs.
  92    GDB reads in the stubs from the $UNWIND_END$ subspace, then
  93    "converts" them into normal unwind entries using some of the reserved
  94    fields to store the stub type.  */
  95
  96 /* The gaps represent linker stubs used in MPE and space for future
  97    expansion.  */
  98 enum unwind_stub_types
  99   {
 100     LONG_BRANCH = 1,
 101     PARAMETER_RELOCATION = 2,
 102     EXPORT = 10,
 103     IMPORT = 11,
 104     IMPORT_SHLIB = 12,
 105   };
 106
 107 /* We use the objfile->obj_private pointer for two things:
 108  * 1.  An unwind table;
 109  *
 110  * 2.  A pointer to any associated shared library object.
 111  *
 112  * #defines are used to help refer to these objects.
 113  */
 114
 115 /* Info about the unwind table associated with an object file.
 116  * This is hung off of the "objfile->obj_private" pointer, and
 117  * is allocated in the objfile's psymbol obstack.  This allows
 118  * us to have unique unwind info for each executable and shared
 119  * library that we are debugging.
 120  */
 121 struct hppa_unwind_info
 122   {
 123     struct unwind_table_entry *table;   /* Pointer to unwind info */
 124     struct unwind_table_entry *cache;   /* Pointer to last entry we found */
 125     int last;                   /* Index of last entry */
 126   };
 127
 128 struct hppa_objfile_private
 129   {
 130     struct hppa_unwind_info *unwind_info;       /* a pointer */
 131     struct so_list *so_info;    /* a pointer  */
 132     CORE_ADDR dp;
 133   };
 134
 135 extern const struct objfile_data *hppa_objfile_priv_data;
 136
 137 #endif  /* HPPA_TDEP_H */