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      1 /* libunwind - a platform-independent unwind library
      2    Copyright (C) 2003-2004 Hewlett-Packard Co
      3 
      4 This file is part of libunwind.
      5 
      6 Permission is hereby granted, free of charge, to any person obtaining
      7 a copy of this software and associated documentation files (the
      8 "Software"), to deal in the Software without restriction, including
      9 without limitation the rights to use, copy, modify, merge, publish,
     10 distribute, sublicense, and/or sell copies of the Software, and to
     11 permit persons to whom the Software is furnished to do so, subject to
     12 the following conditions:
     13 
     14 The above copyright notice and this permission notice shall be
     15 included in all copies or substantial portions of the Software.
     16 
     17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     18 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     20 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     21 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     22 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     23 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
     24 
     25 #ifndef LIBUNWIND_H
     26 #define LIBUNWIND_H
     27 
     28 #if defined(__cplusplus) || defined(c_plusplus)
     29 extern "C" {
     30 #endif
     31 
     32 #include <inttypes.h>
     33 #include <ucontext.h>
     34 
     35 #define UNW_TARGET	hppa
     36 #define UNW_TARGET_HPPA	1
     37 
     38 #define _U_TDEP_QP_TRUE	0	/* see libunwind-dynamic.h  */
     39 
     40 /* This needs to be big enough to accommodate "struct cursor", while
     41    leaving some slack for future expansion.  Changing this value will
     42    require recompiling all users of this library.  Stack allocation is
     43    relatively cheap and unwind-state copying is relatively rare, so we
     44    want to err on making it rather too big than too small.  */
     45 #define UNW_TDEP_CURSOR_LEN	511
     46 
     47 typedef uint32_t unw_word_t;
     48 typedef int32_t unw_sword_t;
     49 
     50 typedef union
     51   {
     52     struct { unw_word_t bits[2]; } raw;
     53     double val;
     54   }
     55 unw_tdep_fpreg_t;
     56 
     57 typedef enum
     58   {
     59     /* Note: general registers are expected to start with index 0.
     60        This convention facilitates architecture-independent
     61        implementation of the C++ exception handling ABI.  See
     62        _Unwind_SetGR() and _Unwind_GetGR() for details.  */
     63     UNW_HPPA_GR = 0,
     64      UNW_HPPA_RP = 2,			/* return pointer */
     65      UNW_HPPA_FP = 3,			/* frame pointer */
     66      UNW_HPPA_SP = UNW_HPPA_GR + 30,
     67 
     68     UNW_HPPA_FR = UNW_HPPA_GR + 32,
     69 
     70     UNW_HPPA_IP = UNW_HPPA_FR + 32,	/* instruction pointer */
     71 
     72     /* other "preserved" registers (fpsr etc.)... */
     73 
     74     /* PA-RISC has 4 exception-argument registers but they're not
     75        contiguous.  To deal with this, we define 4 pseudo
     76        exception-handling registers which we then alias to the actual
     77        physical register.  */
     78 
     79     UNW_HPPA_EH0 = UNW_HPPA_IP + 1,	/* alias for UNW_HPPA_GR + 20 */
     80     UNW_HPPA_EH1 = UNW_HPPA_EH0 + 1,	/* alias for UNW_HPPA_GR + 21 */
     81     UNW_HPPA_EH2 = UNW_HPPA_EH1 + 1,	/* alias for UNW_HPPA_GR + 22 */
     82     UNW_HPPA_EH3 = UNW_HPPA_EH2 + 1,	/* alias for UNW_HPPA_GR + 31 */
     83 
     84     /* frame info (read-only) */
     85     UNW_HPPA_CFA,
     86 
     87     UNW_TDEP_LAST_REG = UNW_HPPA_IP,
     88 
     89     UNW_TDEP_IP = UNW_HPPA_IP,
     90     UNW_TDEP_SP = UNW_HPPA_SP,
     91     UNW_TDEP_EH = UNW_HPPA_EH0
     92   }
     93 hppa_regnum_t;
     94 
     95 #define UNW_TDEP_NUM_EH_REGS	4
     96 
     97 typedef struct unw_tdep_save_loc
     98   {
     99     /* Additional target-dependent info on a save location.  */
    100   }
    101 unw_tdep_save_loc_t;
    102 
    103 /* On PA-RISC, we can directly use ucontext_t as the unwind context.  */
    104 typedef ucontext_t unw_tdep_context_t;
    105 
    106 #define unw_tdep_is_fpreg(r)		((unsigned) ((r) - UNW_HPPA_FR) < 32)
    107 
    108 #include "libunwind-dynamic.h"
    109 
    110 typedef struct
    111   {
    112     /* no PA-RISC-specific auxiliary proc-info */
    113   }
    114 unw_tdep_proc_info_t;
    115 
    116 #include "libunwind-common.h"
    117 
    118 #define unw_tdep_getcontext		UNW_ARCH_OBJ (getcontext)
    119 extern int unw_tdep_getcontext (unw_tdep_context_t *);
    120 
    121 #if defined(__cplusplus) || defined(c_plusplus)
    122 }
    123 #endif
    124 
    125 #endif /* LIBUNWIND_H */
    126