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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [hppa-tdep.h] - Blame information for rev 157

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1 24 jeremybenn
/* Target-dependent code for the HP PA-RISC architecture.
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   Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
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   Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#ifndef HPPA_TDEP_H
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#define HPPA_TDEP_H
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struct trad_frame_saved_reg;
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struct objfile;
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struct so_list;
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/* Register numbers of various important registers.  */
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enum hppa_regnum
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{
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  HPPA_R0_REGNUM = 0,            /* Doesn't actually exist, used as base for
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                                   other r registers.  */
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  HPPA_R1_REGNUM = 1,
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  HPPA_FLAGS_REGNUM = 0, /* Various status flags */
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  HPPA_RP_REGNUM = 2,           /* return pointer */
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  HPPA_FP_REGNUM = 3,           /* The ABI's frame pointer, when used */
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  HPPA_DP_REGNUM = 27,
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  HPPA_RET0_REGNUM = 28,
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  HPPA_RET1_REGNUM = 29,
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  HPPA_SP_REGNUM = 30,          /* Stack pointer.  */
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  HPPA_R31_REGNUM = 31,
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  HPPA_SAR_REGNUM = 32,         /* Shift Amount Register */
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  HPPA_IPSW_REGNUM = 41,        /* Interrupt Processor Status Word */
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  HPPA_PCOQ_HEAD_REGNUM = 33,   /* instruction offset queue head */
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  HPPA_PCSQ_HEAD_REGNUM = 34,   /* instruction space queue head */
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  HPPA_PCOQ_TAIL_REGNUM = 35,   /* instruction offset queue tail */
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  HPPA_PCSQ_TAIL_REGNUM = 36,   /* instruction space queue tail */
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  HPPA_EIEM_REGNUM = 37,        /* External Interrupt Enable Mask */
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  HPPA_IIR_REGNUM = 38,         /* Interrupt Instruction Register */
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  HPPA_ISR_REGNUM = 39,         /* Interrupt Space Register */
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  HPPA_IOR_REGNUM = 40,         /* Interrupt Offset Register */
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  HPPA_SR4_REGNUM = 43,         /* space register 4 */
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  HPPA_RCR_REGNUM = 51,         /* Recover Counter (also known as cr0) */
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  HPPA_PID0_REGNUM = 52,        /* Protection ID */
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  HPPA_PID1_REGNUM = 53,        /* Protection ID */
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  HPPA_PID2_REGNUM = 55,        /* Protection ID */
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  HPPA_PID3_REGNUM = 56,        /* Protection ID */
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  HPPA_CCR_REGNUM = 54,         /* Coprocessor Configuration Register */
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  HPPA_TR0_REGNUM = 57,         /* Temporary Registers (cr24 -> cr31) */
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  HPPA_CR26_REGNUM = 59,
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  HPPA_CR27_REGNUM = 60,        /* Base register for thread-local storage, cr27 */
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  HPPA_FP0_REGNUM = 64,         /* First floating-point.  */
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  HPPA_FP4_REGNUM = 72,
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  HPPA64_FP4_REGNUM = 68,
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  HPPA_FP31R_REGNUM = 127,      /* Last floating-point.  */
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  HPPA_ARG0_REGNUM = 26,        /* The first argument of a callee. */
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  HPPA_ARG1_REGNUM = 25,        /* The second argument of a callee. */
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  HPPA_ARG2_REGNUM = 24,        /* The third argument of a callee. */
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  HPPA_ARG3_REGNUM = 23         /* The fourth argument of a callee. */
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};
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/* Instruction size.  */
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#define HPPA_INSN_SIZE 4
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/* Target-dependent structure in gdbarch.  */
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struct gdbarch_tdep
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{
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  /* The number of bytes in an address.  For now, this field is designed
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     to allow us to differentiate hppa32 from hppa64 targets.  */
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  int bytes_per_address;
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  /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux
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     system.  */
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  int is_elf;
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  /* Given a function address, try to find the global pointer for the
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     corresponding shared object.  */
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  CORE_ADDR (*find_global_pointer) (struct gdbarch *, struct value *);
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  /* For shared libraries, each call goes through a small piece of
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     trampoline code in the ".plt", or equivalent, section.
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     IN_SOLIB_CALL_TRAMPOLINE evaluates to nonzero if we are currently
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     stopped in one of these.  */
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  int (*in_solib_call_trampoline) (CORE_ADDR pc, char *name);
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  /* For targets that support multiple spaces, we may have additional stubs
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     in the return path.  These stubs are internal to the ABI, and users are
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     not interested in them.  If we detect that we are returning to a stub,
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     adjust the pc to the real caller.  This improves the behavior of commands
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     that traverse frames such as "up" and "finish".  */
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  void (*unwind_adjust_stub) (struct frame_info *next_frame, CORE_ADDR base,
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                              struct trad_frame_saved_reg *saved_regs);
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  /* These are solib-dependent methods.  They are really HPUX only, but
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     we don't have a HPUX-specific tdep vector at the moment.  */
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  CORE_ADDR (*solib_thread_start_addr) (struct so_list *so);
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  CORE_ADDR (*solib_get_got_by_pc) (CORE_ADDR addr);
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  CORE_ADDR (*solib_get_solib_by_pc) (CORE_ADDR addr);
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  CORE_ADDR (*solib_get_text_base) (struct objfile *objfile);
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};
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/*
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 * Unwind table and descriptor.
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 */
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struct unwind_table_entry
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  {
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    CORE_ADDR region_start;
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    CORE_ADDR region_end;
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    unsigned int Cannot_unwind:1;       /* 0 */
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    unsigned int Millicode:1;   /* 1 */
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    unsigned int Millicode_save_sr0:1;  /* 2 */
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    unsigned int Region_description:2;  /* 3..4 */
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    unsigned int reserved:1;    /* 5 */
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    unsigned int Entry_SR:1;    /* 6 */
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    unsigned int Entry_FR:4;    /* number saved *//* 7..10 */
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    unsigned int Entry_GR:5;    /* number saved *//* 11..15 */
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    unsigned int Args_stored:1; /* 16 */
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    unsigned int Variable_Frame:1;      /* 17 */
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    unsigned int Separate_Package_Body:1;       /* 18 */
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    unsigned int Frame_Extension_Millicode:1;   /* 19 */
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    unsigned int Stack_Overflow_Check:1;        /* 20 */
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    unsigned int Two_Instruction_SP_Increment:1;        /* 21 */
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    unsigned int sr4export:1;   /* 22 */
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    unsigned int cxx_info:1;    /* 23 */
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    unsigned int cxx_try_catch:1;       /* 24 */
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    unsigned int sched_entry_seq:1;     /* 25 */
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    unsigned int reserved1:1;   /* 26 */
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    unsigned int Save_SP:1;     /* 27 */
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    unsigned int Save_RP:1;     /* 28 */
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    unsigned int Save_MRP_in_frame:1;   /* 29 */
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    unsigned int save_r19:1;    /* 30 */
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    unsigned int Cleanup_defined:1;     /* 31 */
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    unsigned int MPE_XL_interrupt_marker:1;     /* 0 */
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    unsigned int HP_UX_interrupt_marker:1;      /* 1 */
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    unsigned int Large_frame:1; /* 2 */
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    unsigned int alloca_frame:1;        /* 3 */
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    unsigned int reserved2:1;   /* 4 */
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    unsigned int Total_frame_size:27;   /* 5..31 */
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    /* This is *NOT* part of an actual unwind_descriptor in an object
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       file.  It is *ONLY* part of the "internalized" descriptors that
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       we create from those in a file.
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     */
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    struct
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      {
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        unsigned int stub_type:4;       /* 0..3 */
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        unsigned int padding:28;        /* 4..31 */
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      }
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    stub_unwind;
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  };
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/* HP linkers also generate unwinds for various linker-generated stubs.
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   GDB reads in the stubs from the $UNWIND_END$ subspace, then
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   "converts" them into normal unwind entries using some of the reserved
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   fields to store the stub type.  */
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/* The gaps represent linker stubs used in MPE and space for future
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   expansion.  */
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enum unwind_stub_types
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  {
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    LONG_BRANCH = 1,
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    PARAMETER_RELOCATION = 2,
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    EXPORT = 10,
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    IMPORT = 11,
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    IMPORT_SHLIB = 12,
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  };
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struct unwind_table_entry *find_unwind_entry (CORE_ADDR);
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/* We use the objfile->obj_private pointer for two things:
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 * 1.  An unwind table;
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 *
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 * 2.  A pointer to any associated shared library object.
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 *
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 * #defines are used to help refer to these objects.
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 */
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/* Info about the unwind table associated with an object file.
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 * This is hung off of the "objfile->obj_private" pointer, and
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 * is allocated in the objfile's psymbol obstack.  This allows
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 * us to have unique unwind info for each executable and shared
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 * library that we are debugging.
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 */
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struct hppa_unwind_info
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  {
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    struct unwind_table_entry *table;   /* Pointer to unwind info */
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    struct unwind_table_entry *cache;   /* Pointer to last entry we found */
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    int last;                   /* Index of last entry */
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  };
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struct hppa_objfile_private
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  {
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    struct hppa_unwind_info *unwind_info;       /* a pointer */
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    struct so_list *so_info;    /* a pointer  */
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    CORE_ADDR dp;
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    int dummy_call_sequence_reg;
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    CORE_ADDR dummy_call_sequence_addr;
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  };
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extern const struct objfile_data *hppa_objfile_priv_data;
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int hppa_get_field (unsigned word, int from, int to);
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int hppa_extract_5_load (unsigned int);
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unsigned hppa_extract_5R_store (unsigned int);
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unsigned hppa_extract_5r_store (unsigned int);
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int hppa_extract_17 (unsigned int);
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int hppa_extract_21 (unsigned);
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int hppa_extract_14 (unsigned);
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int hppa_low_sign_extend (unsigned int, unsigned int);
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int hppa_sign_extend (unsigned int, unsigned int);
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CORE_ADDR hppa_symbol_address(const char *sym);
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extern void
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  hppa_frame_prev_register_helper (struct frame_info *next_frame,
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                                   struct trad_frame_saved_reg *saved_regs,
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                                   int regnum, int *optimizedp,
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                                   enum lval_type *lvalp, CORE_ADDR *addrp,
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                                   int *realnump, gdb_byte *valuep);
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extern CORE_ADDR hppa_read_pc (struct regcache *regcache);
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extern void hppa_write_pc (struct regcache *regcache, CORE_ADDR pc);
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extern CORE_ADDR hppa_unwind_pc (struct gdbarch *gdbarch,
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                                 struct frame_info *next_frame);
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extern struct minimal_symbol *
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  hppa_lookup_stub_minimal_symbol (const char *name,
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                                   enum unwind_stub_types stub_type);
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extern struct hppa_objfile_private *
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hppa_init_objfile_priv_data (struct objfile *objfile);
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extern int hppa_in_solib_call_trampoline (CORE_ADDR pc, char *name);
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extern CORE_ADDR hppa_skip_trampoline_code (struct frame_info *, CORE_ADDR pc);
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#endif  /* hppa-tdep.h */

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