1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2001-2004 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 4 5 This file is part of libunwind. 6 7 Permission is hereby granted, free of charge, to any person obtaining 8 a copy of this software and associated documentation files (the 9 "Software"), to deal in the Software without restriction, including 10 without limitation the rights to use, copy, modify, merge, publish, 11 distribute, sublicense, and/or sell copies of the Software, and to 12 permit persons to whom the Software is furnished to do so, subject to 13 the following conditions: 14 15 The above copyright notice and this permission notice shall be 16 included in all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 25 26 #ifndef LIBUNWIND_H 27 #define LIBUNWIND_H 28 29 #include <inttypes.h> 30 #include <ucontext.h> 31 32 #if defined(__cplusplus) || defined(c_plusplus) 33 extern "C" { 34 #endif 35 36 #ifdef ia64 37 /* This works around a bug in Intel's ECC v7.0 which defines "ia64" 38 as "1". */ 39 # undef ia64 40 #endif 41 42 #ifdef __hpux 43 /* On HP-UX, there is no hope of supporting UNW_LOCAL_ONLY, because 44 it's impossible to obtain the address of the members in the 45 sigcontext structure. */ 46 # undef UNW_LOCAL_ONLY 47 # define UNW_GENERIC_ONLY 48 #endif 49 50 #define UNW_TARGET ia64 51 #define UNW_TARGET_IA64 1 52 53 #define _U_TDEP_QP_TRUE 0 /* see libunwind-dynamic.h */ 54 55 /* This needs to be big enough to accommodate "struct cursor", while 56 leaving some slack for future expansion. Changing this value will 57 require recompiling all users of this library. Stack allocation is 58 relatively cheap and unwind-state copying is relatively rare, so we 59 want to err on making it rather too big than too small. */ 60 #define UNW_TDEP_CURSOR_LEN 511 61 62 /* If this bit is it indicates that the procedure saved all of ar.bsp, 63 ar.bspstore, and ar.rnat. If, additionally, ar.bsp != saved ar.bsp, 64 then this procedure has performed a register-backing-store switch. */ 65 #define UNW_PI_FLAG_IA64_RBS_SWITCH_BIT (UNW_PI_FLAG_FIRST_TDEP_BIT + 0) 66 67 #define UNW_PI_FLAG_IA64_RBS_SWITCH (1 << UNW_PI_FLAG_IA64_RBS_SWITCH_BIT) 68 69 typedef uint64_t unw_word_t; 70 typedef int64_t unw_sword_t; 71 72 /* On IA-64, we want to access the contents of floating-point 73 registers as a pair of "words", but to ensure 16-byte alignment, we 74 make it a union that contains a "long double". This will do the 75 Right Thing on all known IA-64 platforms, including HP-UX. */ 76 typedef union 77 { 78 struct { unw_word_t bits[2]; } raw; 79 long double dummy; /* dummy to force 16-byte alignment */ 80 } 81 unw_tdep_fpreg_t; 82 83 typedef struct 84 { 85 /* no ia64-specific auxiliary proc-info */ 86 } 87 unw_tdep_proc_info_t; 88 89 typedef enum 90 { 91 /* Note: general registers are excepted to start with index 0. 92 This convention facilitates architecture-independent 93 implementation of the C++ exception handling ABI. See 94 _Unwind_SetGR() and _Unwind_GetGR() for details. */ 95 UNW_IA64_GR = 0, /* general registers (r0..r127) */ 96 UNW_IA64_GP = UNW_IA64_GR + 1, 97 UNW_IA64_TP = UNW_IA64_GR + 13, 98 99 UNW_IA64_NAT = UNW_IA64_GR + 128, /* NaT registers (nat0..nat127) */ 100 101 UNW_IA64_FR = UNW_IA64_NAT + 128, /* fp registers (f0..f127) */ 102 103 UNW_IA64_AR = UNW_IA64_FR + 128, /* application registers (ar0..r127) */ 104 UNW_IA64_AR_RSC = UNW_IA64_AR + 16, 105 UNW_IA64_AR_BSP = UNW_IA64_AR + 17, 106 UNW_IA64_AR_BSPSTORE = UNW_IA64_AR + 18, 107 UNW_IA64_AR_RNAT = UNW_IA64_AR + 19, 108 UNW_IA64_AR_CSD = UNW_IA64_AR + 25, 109 UNW_IA64_AR_26 = UNW_IA64_AR + 26, 110 UNW_IA64_AR_SSD = UNW_IA64_AR_26, 111 UNW_IA64_AR_CCV = UNW_IA64_AR + 32, 112 UNW_IA64_AR_UNAT = UNW_IA64_AR + 36, 113 UNW_IA64_AR_FPSR = UNW_IA64_AR + 40, 114 UNW_IA64_AR_PFS = UNW_IA64_AR + 64, 115 UNW_IA64_AR_LC = UNW_IA64_AR + 65, 116 UNW_IA64_AR_EC = UNW_IA64_AR + 66, 117 118 UNW_IA64_BR = UNW_IA64_AR + 128, /* branch registers (b0..p7) */ 119 UNW_IA64_RP = UNW_IA64_BR + 0, /* return pointer (rp) */ 120 UNW_IA64_PR = UNW_IA64_BR + 8, /* predicate registers (p0..p63) */ 121 UNW_IA64_CFM, 122 123 /* frame info: */ 124 UNW_IA64_BSP, 125 UNW_IA64_IP, 126 UNW_IA64_SP, 127 128 UNW_TDEP_LAST_REG = UNW_IA64_SP, 129 130 UNW_TDEP_IP = UNW_IA64_IP, 131 UNW_TDEP_SP = UNW_IA64_SP, 132 UNW_TDEP_EH = UNW_IA64_GR + 15 133 } 134 ia64_regnum_t; 135 136 #define UNW_TDEP_NUM_EH_REGS 4 /* r15-r18 are exception args */ 137 138 typedef struct unw_tdep_save_loc 139 { 140 /* Additional target-dependent info on a save location. On IA-64, 141 we use this to provide the bit number in which a NaT bit gets 142 saved. */ 143 uint8_t nat_bitnr; 144 145 /* Padding reserved for future use. */ 146 uint8_t reserved[7]; 147 } 148 unw_tdep_save_loc_t; 149 150 /* On IA-64, we can directly use ucontext_t as the unwind context. */ 151 typedef ucontext_t unw_tdep_context_t; 152 153 #define unw_tdep_is_fpreg(r) ((unsigned) ((r) - UNW_IA64_FR) < 128) 154 155 #include "libunwind-dynamic.h" 156 #include "libunwind-common.h" 157 158 #ifdef __hpux 159 /* In theory, we could use _Uia64_getcontext() on HP-UX as well, but 160 the benefit of doing so would be marginal given that it can't 161 support UNW_LOCAL_ONLY. */ 162 # define unw_tdep_getcontext getcontext 163 #else 164 # define unw_tdep_getcontext UNW_ARCH_OBJ (getcontext) 165 extern int unw_tdep_getcontext (unw_tdep_context_t *); 166 #endif 167 168 /* This is a helper routine to search an ia64 unwind table. If the 169 address-space argument AS points to something other than the local 170 address-space, the memory for the unwind-info will be allocated 171 with malloc(), and should be free()d during the put_unwind_info() 172 callback. This routine is signal-safe for the local-address-space 173 case ONLY. */ 174 #define unw_search_ia64_unwind_table UNW_OBJ(search_unwind_table) 175 extern int unw_search_ia64_unwind_table (unw_addr_space_t, unw_word_t, 176 unw_dyn_info_t *, unw_proc_info_t *, 177 int, void *); 178 179 /* This is a helper routine which the get_dyn_info_list_addr() 180 callback can use to locate the special dynamic-info list entry in 181 an IA-64 unwind table. If the entry exists in the table, the 182 list-address is returned. In all other cases, 0 is returned. */ 183 extern unw_word_t _Uia64_find_dyn_list (unw_addr_space_t, unw_dyn_info_t *, 184 void *); 185 186 /* This is a helper routine to obtain the kernel-unwind info. It is 187 signal-safe. */ 188 extern int _Uia64_get_kernel_table (unw_dyn_info_t *); 189 190 #if defined(__cplusplus) || defined(c_plusplus) 191 } 192 #endif 193 194 #endif /* LIBUNWIND_H */ 195