1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2008 CodeSourcery 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 #ifdef mips 36 # undef mips 37 #endif 38 39 #define UNW_TARGET mips 40 #define UNW_TARGET_MIPS 1 41 42 #define _U_TDEP_QP_TRUE 0 /* see libunwind-dynamic.h */ 43 44 /* This needs to be big enough to accommodate "struct cursor", while 45 leaving some slack for future expansion. Changing this value will 46 require recompiling all users of this library. Stack allocation is 47 relatively cheap and unwind-state copying is relatively rare, so we 48 want to err on making it rather too big than too small. */ 49 50 /* FIXME for MIPS. Too big? What do other things use for similar tasks? */ 51 #define UNW_TDEP_CURSOR_LEN 4096 52 53 /* The size of a "word" varies on MIPS. This type is used for memory 54 addresses and register values. To allow a single library to support 55 multiple ABIs, and to support N32 at all, we must use a 64-bit type 56 even when addresses are only 32 bits. */ 57 typedef uint64_t unw_word_t; 58 typedef int32_t unw_sword_t; 59 60 /* FIXME: MIPS ABIs. */ 61 typedef long double unw_tdep_fpreg_t; 62 63 typedef enum 64 { 65 UNW_MIPS_R0, 66 UNW_MIPS_R1, 67 UNW_MIPS_R2, 68 UNW_MIPS_R3, 69 UNW_MIPS_R4, 70 UNW_MIPS_R5, 71 UNW_MIPS_R6, 72 UNW_MIPS_R7, 73 UNW_MIPS_R8, 74 UNW_MIPS_R9, 75 UNW_MIPS_R10, 76 UNW_MIPS_R11, 77 UNW_MIPS_R12, 78 UNW_MIPS_R13, 79 UNW_MIPS_R14, 80 UNW_MIPS_R15, 81 UNW_MIPS_R16, 82 UNW_MIPS_R17, 83 UNW_MIPS_R18, 84 UNW_MIPS_R19, 85 UNW_MIPS_R20, 86 UNW_MIPS_R21, 87 UNW_MIPS_R22, 88 UNW_MIPS_R23, 89 UNW_MIPS_R24, 90 UNW_MIPS_R25, 91 UNW_MIPS_R26, 92 UNW_MIPS_R27, 93 UNW_MIPS_R28, 94 UNW_MIPS_R29, 95 UNW_MIPS_R30, 96 UNW_MIPS_R31, 97 98 UNW_MIPS_PC = 34, 99 100 /* FIXME: Other registers! */ 101 102 /* For MIPS, the CFA is the value of SP (r29) at the call site in the 103 previous frame. */ 104 UNW_MIPS_CFA, 105 106 UNW_TDEP_LAST_REG = UNW_MIPS_R31, 107 108 UNW_TDEP_IP = UNW_MIPS_R31, 109 UNW_TDEP_SP = UNW_MIPS_R29, 110 UNW_TDEP_EH = UNW_MIPS_R0 /* FIXME. */ 111 } 112 mips_regnum_t; 113 114 typedef enum 115 { 116 UNW_MIPS_ABI_O32, 117 UNW_MIPS_ABI_N32, 118 UNW_MIPS_ABI_N64 119 } 120 mips_abi_t; 121 122 #define UNW_TDEP_NUM_EH_REGS 2 /* FIXME for MIPS. */ 123 124 typedef struct unw_tdep_save_loc 125 { 126 /* Additional target-dependent info on a save location. */ 127 /* ANDROID support update. */ 128 char __reserved; 129 /* End of ANDROID update. */ 130 } 131 unw_tdep_save_loc_t; 132 133 /* On x86, we can directly use ucontext_t as the unwind context. FIXME for 134 MIPS. */ 135 typedef ucontext_t unw_tdep_context_t; 136 137 #include "libunwind-dynamic.h" 138 139 typedef struct 140 { 141 /* no mips-specific auxiliary proc-info */ 142 /* ANDROID support update. */ 143 char __reserved; 144 /* End of ANDROID update. */ 145 } 146 unw_tdep_proc_info_t; 147 148 #include "libunwind-common.h" 149 150 /* There is no getcontext() on MIPS. Use a stub version which only saves GP 151 registers. FIXME: Not ideal, may not be sufficient for all libunwind 152 use cases. */ 153 #define unw_tdep_getcontext UNW_ARCH_OBJ(getcontext) 154 extern int unw_tdep_getcontext (ucontext_t *uc); 155 156 #define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg) 157 extern int unw_tdep_is_fpreg (int); 158 159 #if defined(__cplusplus) || defined(c_plusplus) 160 } 161 #endif 162 163 #endif /* LIBUNWIND_H */ 164