gdb/hppa-tdep.h - gdb

Data types defined

Macros defined

Source code

  1. /* Target-dependent code for the HP PA-RISC architecture.

  3.    Copyright (C) 2003-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  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.

  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.

  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/>.  */

  20. #ifndef HPPA_TDEP_H
  21. ‌#define HPPA_TDEP_H

  23. struct trad_frame_saved_reg;
  24. struct objfile;
  25. struct so_list;

  27. /* Register numbers of various important registers.  */

  29. ‌enum hppa_regnum
  30. {
  31.   HPPA_R0_REGNUM = 0,                /* Doesn't actually exist, used as base for
  32.                                    other r registers.  */
  33.   HPPA_R1_REGNUM = 1,
  34.   HPPA_FLAGS_REGNUM = 0,        /* Various status flags */
  35.   HPPA_RP_REGNUM = 2,                /* return pointer */
  36.   HPPA_FP_REGNUM = 3,                /* The ABI's frame pointer, when used */
  37.   HPPA_DP_REGNUM = 27,
  38.   HPPA_RET0_REGNUM = 28,
  39.   HPPA_RET1_REGNUM = 29,
  40.   HPPA_SP_REGNUM = 30,                /* Stack pointer.  */
  41.   HPPA_R31_REGNUM = 31,
  42.   HPPA_SAR_REGNUM = 32,                /* Shift Amount Register */
  43.   HPPA_IPSW_REGNUM = 41,        /* Interrupt Processor Status Word */
  44.   HPPA_PCOQ_HEAD_REGNUM = 33,        /* instruction offset queue head */
  45.   HPPA_PCSQ_HEAD_REGNUM = 34,        /* instruction space queue head */
  46.   HPPA_PCOQ_TAIL_REGNUM = 35,        /* instruction offset queue tail */
  47.   HPPA_PCSQ_TAIL_REGNUM = 36,        /* instruction space queue tail */
  48.   HPPA_EIEM_REGNUM = 37,        /* External Interrupt Enable Mask */
  49.   HPPA_IIR_REGNUM = 38,                /* Interrupt Instruction Register */
  50.   HPPA_ISR_REGNUM = 39,                /* Interrupt Space Register */
  51.   HPPA_IOR_REGNUM = 40,                /* Interrupt Offset Register */
  52.   HPPA_SR4_REGNUM = 43,                /* space register 4 */
  53.   HPPA_SR0_REGNUM = 44,                /* space register 0 */
  54.   HPPA_SR1_REGNUM = 45,                /* space register 1 */
  55.   HPPA_SR2_REGNUM = 46,                /* space register 2 */
  56.   HPPA_SR3_REGNUM = 47,                /* space register 3 */
  57.   HPPA_SR5_REGNUM = 48,                /* space register 5 */
  58.   HPPA_SR6_REGNUM = 49,                /* space register 6 */
  59.   HPPA_SR7_REGNUM = 50,                /* space register 7 */
  60.   HPPA_RCR_REGNUM = 51,                /* Recover Counter (also known as cr0) */
  61.   HPPA_PID0_REGNUM = 52,        /* Protection ID */
  62.   HPPA_PID1_REGNUM = 53,        /* Protection ID */
  63.   HPPA_PID2_REGNUM = 55,        /* Protection ID */
  64.   HPPA_PID3_REGNUM = 56,        /* Protection ID */
  65.   HPPA_CCR_REGNUM = 54,                /* Coprocessor Configuration Register */
  66.   HPPA_TR0_REGNUM = 57,                /* Temporary Registers (cr24 -> cr31) */
  67.   HPPA_CR26_REGNUM = 59,
  68.   HPPA_CR27_REGNUM = 60,        /* Base register for thread-local
  69.                                    storage, cr27 */
  70.   HPPA_FP0_REGNUM = 64,                /* First floating-point.  */
  71.   HPPA_FP4_REGNUM = 72,
  72.   HPPA64_FP4_REGNUM = 68,
  73.   HPPA_FP31R_REGNUM = 127,        /* Last floating-point.  */

  75.   HPPA_ARG0_REGNUM = 26,        /* The first argument of a callee.  */
  76.   HPPA_ARG1_REGNUM = 25,        /* The second argument of a callee.  */
  77.   HPPA_ARG2_REGNUM = 24,        /* The third argument of a callee.  */
  78.   HPPA_ARG3_REGNUM = 23                /* The fourth argument of a callee.  */
  79. };

  81. /* Instruction size.  */
  82. ‌#define HPPA_INSN_SIZE 4

  84. /* Target-dependent structure in gdbarch.  */
  85. ‌struct gdbarch_tdep
  86. {
  87.   /* The number of bytes in an address.  For now, this field is designed
  88.      to allow us to differentiate hppa32 from hppa64 targets.  */
  89.   int bytes_per_address;

  91.   /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux
  92.      system.  */
  93.   int is_elf;

  95.   /* Given a function address, try to find the global pointer for the
  96.      corresponding shared object.  */
  97.   CORE_ADDR (*find_global_pointer) (struct gdbarch *, struct value *);

  99.   /* For shared libraries, each call goes through a small piece of
  100.      trampoline code in the ".plt" section.  IN_SOLIB_CALL_TRAMPOLINE
  101.      evaluates to nonzero if we are currently stopped in one of these.  */
  102.   int (*in_solib_call_trampoline) (struct gdbarch *gdbarch, CORE_ADDR pc);

  104.   /* For targets that support multiple spaces, we may have additional stubs
  105.      in the return path.  These stubs are internal to the ABI, and users are
  106.      not interested in them.  If we detect that we are returning to a stub,
  107.      adjust the pc to the real caller.  This improves the behavior of commands
  108.      that traverse frames such as "up" and "finish".  */
  109.   void (*unwind_adjust_stub) (struct frame_info *this_frame, CORE_ADDR base,
  110.                                 struct trad_frame_saved_reg *saved_regs);

  112.   /* These are solib-dependent methods.  They are really HPUX only, but
  113.      we don't have a HPUX-specific tdep vector at the moment.  */
  114.   CORE_ADDR (*solib_thread_start_addr) (struct so_list *so);
  115.   CORE_ADDR (*solib_get_got_by_pc) (CORE_ADDR addr);
  116.   CORE_ADDR (*solib_get_solib_by_pc) (CORE_ADDR addr);
  117.   CORE_ADDR (*solib_get_text_base) (struct objfile *objfile);
  118. };

  120. /*
  121. * Unwind table and descriptor.
  122. */

  124. ‌struct unwind_table_entry
  125.   {
  126.     CORE_ADDR region_start;
  127.     CORE_ADDR region_end;

  129.     unsigned int Cannot_unwind:1;        /* 0 */
  130.     unsigned int Millicode:1;        /* 1 */
  131.     unsigned int Millicode_save_sr0:1;        /* 2 */
  132.     unsigned int Region_description:2;        /* 3..4 */
  133.     unsigned int reserved:1;        /* 5 */
  134.     unsigned int Entry_SR:1;        /* 6 */
  135.     unsigned int Entry_FR:4;        /* number saved *//* 7..10 */
  136.     unsigned int Entry_GR:5;        /* number saved *//* 11..15 */
  137.     unsigned int Args_stored:1;        /* 16 */
  138.     unsigned int Variable_Frame:1;        /* 17 */
  139.     unsigned int Separate_Package_Body:1;        /* 18 */
  140.     unsigned int Frame_Extension_Millicode:1;        /* 19 */
  141.     unsigned int Stack_Overflow_Check:1;        /* 20 */
  142.     unsigned int Two_Instruction_SP_Increment:1;        /* 21 */
  143.     unsigned int sr4export:1;        /* 22 */
  144.     unsigned int cxx_info:1;        /* 23 */
  145.     unsigned int cxx_try_catch:1;        /* 24 */
  146.     unsigned int sched_entry_seq:1;        /* 25 */
  147.     unsigned int reserved1:1;        /* 26 */
  148.     unsigned int Save_SP:1;        /* 27 */
  149.     unsigned int Save_RP:1;        /* 28 */
  150.     unsigned int Save_MRP_in_frame:1;        /* 29 */
  151.     unsigned int save_r19:1;        /* 30 */
  152.     unsigned int Cleanup_defined:1;        /* 31 */

  154.     unsigned int MPE_XL_interrupt_marker:1;        /* 0 */
  155.     unsigned int HP_UX_interrupt_marker:1;        /* 1 */
  156.     unsigned int Large_frame:1;        /* 2 */
  157.     unsigned int alloca_frame:1;        /* 3 */
  158.     unsigned int reserved2:1;        /* 4 */
  159.     unsigned int Total_frame_size:27;        /* 5..31 */

  161.     /* This is *NOT* part of an actual unwind_descriptor in an object
  162.        file.  It is *ONLY* part of the "internalized" descriptors that
  163.        we create from those in a file.  */

  165.     struct
  166.       {
  167.         unsigned int stub_type:4;        /* 0..3 */
  168.         unsigned int padding:28;        /* 4..31 */
  169.       }
  170.     stub_unwind;
  171.   };

  173. /* HP linkers also generate unwinds for various linker-generated stubs.
  174.    GDB reads in the stubs from the $UNWIND_END$ subspace, then
  175.    "converts" them into normal unwind entries using some of the reserved
  176.    fields to store the stub type.  */

  178. /* The gaps represent linker stubs used in MPE and space for future
  179.    expansion.  */
  180. ‌enum unwind_stub_types
  181.   {
  182.     LONG_BRANCH = 1,
  183.     PARAMETER_RELOCATION = 2,
  184.     EXPORT = 10,
  185.     IMPORT = 11,
  186.     IMPORT_SHLIB = 12,
  187.   };

  189. struct unwind_table_entry *find_unwind_entry (CORE_ADDR);

  191. /* We use the objfile->obj_private pointer for two things:
  192. * 1.  An unwind table;
  193. *
  194. * 2.  A pointer to any associated shared library object.
  195. *
  196. * #defines are used to help refer to these objects.
  197. */

  199. /* Info about the unwind table associated with an object file.
  200. * This is hung off of the "objfile->obj_private" pointer, and
  201. * is allocated in the objfile's psymbol obstack.  This allows
  202. * us to have unique unwind info for each executable and shared
  203. * library that we are debugging.
  204. */
  205. ‌struct hppa_unwind_info
  206.   {
  207.     struct unwind_table_entry *table;        /* Pointer to unwind info */
  208.     struct unwind_table_entry *cache;        /* Pointer to last entry we found */
  209.     int last;                                /* Index of last entry */
  210.   };

  212. ‌struct hppa_objfile_private
  213.   {
  214.     struct hppa_unwind_info *unwind_info;        /* a pointer */
  215.     struct so_list *so_info;                        /* a pointer  */
  216.     CORE_ADDR dp;

  218.     int dummy_call_sequence_reg;
  219.     CORE_ADDR dummy_call_sequence_addr;
  220.   };

  222. extern const struct objfile_data *hppa_objfile_priv_data;

  224. int hppa_get_field (unsigned word, int from, int to);
  225. int hppa_extract_5_load (unsigned int);
  226. unsigned hppa_extract_5R_store (unsigned int);
  227. unsigned hppa_extract_5r_store (unsigned int);
  228. int hppa_extract_17 (unsigned int);
  229. int hppa_extract_21 (unsigned);
  230. int hppa_extract_14 (unsigned);
  231. CORE_ADDR hppa_symbol_address(const char *sym);

  233. extern struct value *
  234.   hppa_frame_prev_register_helper (struct frame_info *this_frame,
  235.                                    struct trad_frame_saved_reg *saved_regs,
  236.                                    int regnum);

  238. extern CORE_ADDR hppa_read_pc (struct regcache *regcache);
  239. extern void hppa_write_pc (struct regcache *regcache, CORE_ADDR pc);
  240. extern CORE_ADDR hppa_unwind_pc (struct gdbarch *gdbarch,
  241.                                  struct frame_info *next_frame);

  243. extern struct bound_minimal_symbol
  244.   hppa_lookup_stub_minimal_symbol (const char *name,
  245.                                    enum unwind_stub_types stub_type);

  247. extern struct hppa_objfile_private *hppa_init_objfile_priv_data (struct objfile *objfile);

  249. extern int hppa_in_solib_call_trampoline (struct gdbarch *gdbarch,
  250.                                           CORE_ADDR pc);
  251. extern CORE_ADDR hppa_skip_trampoline_code (struct frame_info *, CORE_ADDR pc);

  253. #endif  /* hppa-tdep.h */