| 1 | /* Header file for unwinding stack frames for exception handling. */
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| 2 | /* Compile this one with gcc. */
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| 3 | /* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
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| 4 | Contributed by Jason Merrill <jason@cygnus.com>.
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| 5 |
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| 6 | This file is part of GNU CC.
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| 7 |
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| 8 | GNU CC is free software; you can redistribute it and/or modify
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| 9 | it under the terms of the GNU General Public License as published by
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| 10 | the Free Software Foundation; either version 2, or (at your option)
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| 11 | any later version.
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| 12 |
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| 13 | GNU CC is distributed in the hope that it will be useful,
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with GNU CC; see the file COPYING. If not, write to
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| 20 | the Free Software Foundation, 59 Temple Place - Suite 330,
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| 21 | Boston, MA 02111-1307, USA. */
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| 22 |
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| 23 |
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| 24 | /* Number of hardware registers known to the compiler.
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| 25 | We have 128 general registers, 128 floating point registers, 64 predicate
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| 26 | registers, 8 branch registers, and one frame pointer register. */
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| 27 |
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| 28 | /* ??? Should add ar.lc, ar.ec and probably also ar.pfs. */
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| 29 |
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| 30 | #define FIRST_PSEUDO_REGISTER 330
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| 31 |
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| 32 | #ifndef DWARF_FRAME_REGISTERS
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| 33 | #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
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| 34 | #endif
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| 35 |
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| 36 | typedef struct frame_state
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| 37 | {
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| 38 | void *cfa;
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| 39 | void *eh_ptr;
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| 40 | long cfa_offset;
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| 41 | long args_size;
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| 42 | long reg_or_offset[DWARF_FRAME_REGISTERS+1];
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| 43 | unsigned short cfa_reg;
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| 44 | unsigned short retaddr_column;
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| 45 | char saved[DWARF_FRAME_REGISTERS+1];
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| 46 | } frame_state;
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| 47 |
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| 48 | /* Values for 'saved' above. */
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| 49 | #define REG_UNSAVED 0
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| 50 | #define REG_SAVED_OFFSET 1
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| 51 | #define REG_SAVED_REG 2
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| 52 |
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| 53 | /* The representation for an "object" to be searched for frame unwind info.
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| 54 | For targets with named sections, one object is an executable or shared
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| 55 | library; for other targets, one object is one translation unit.
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| 56 |
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| 57 | A copy of this structure declaration is printed by collect2.c;
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| 58 | keep the copies synchronized! */
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| 59 |
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| 60 | struct object {
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| 61 | #ifdef IA64_UNWIND_INFO
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| 62 | void *pc_base; /* This field will be set by __do_frame_setup. */
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| 63 | #endif
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| 64 | void *pc_begin;
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| 65 | void *pc_end;
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| 66 | struct dwarf_fde *fde_begin;
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| 67 | struct dwarf_fde **fde_array;
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| 68 | size_t count;
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| 69 | struct object *next;
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| 70 | };
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| 71 |
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| 72 | /* Called from __throw to find the registers to restore for a given
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| 73 | PC_TARGET. The caller should allocate a local variable of `struct
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| 74 | frame_state' (declared in frame.h) and pass its address to STATE_IN.
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| 75 | Returns NULL on failure, otherwise returns STATE_IN. */
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| 76 |
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| 77 | extern struct frame_state *__frame_state_for (void *, struct frame_state *);
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| 78 |
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| 79 | #ifdef IA64_UNWIND_INFO
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| 80 |
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| 81 | /* This is the information required for unwind records in an ia64
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| 82 | object file. This is required by GAS and the compiler runtime. */
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| 83 |
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| 84 | /* These are the starting point masks for the various types of
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| 85 | unwind records. To create a record of type R3 for instance, one
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| 86 | starts by using the value UNW_R3 and or-ing in any other required values.
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| 87 | These values are also unique (in context), so they can be used to identify
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| 88 | the various record types as well. UNW_Bx and some UNW_Px do have the
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| 89 | same value, but Px can only occur in a prologue context, and Bx in
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| 90 | a body context. */
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| 91 |
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| 92 | #define UNW_R1 0x00
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| 93 | #define UNW_R2 0x40
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| 94 | #define UNW_R3 0x60
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| 95 | #define UNW_P1 0x80
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| 96 | #define UNW_P2 0xA0
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| 97 | #define UNW_P3 0xB0
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| 98 | #define UNW_P4 0xB8
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| 99 | #define UNW_P5 0xB9
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| 100 | #define UNW_P6 0xC0
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| 101 | #define UNW_P7 0xE0
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| 102 | #define UNW_P8 0xF0
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| 103 | #define UNW_P9 0xF1
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| 104 | #define UNW_P10 0xFF
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| 105 | #define UNW_X1 0xF9
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| 106 | #define UNW_X2 0xFA
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| 107 | #define UNW_X3 0xFB
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| 108 | #define UNW_X4 0xFC
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| 109 | #define UNW_B1 0x80
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| 110 | #define UNW_B2 0xC0
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| 111 | #define UNW_B3 0xE0
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| 112 | #define UNW_B4 0xF0
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| 113 |
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| 114 | /* These are all the various types of unwind records. */
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| 115 |
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| 116 | typedef enum
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| 117 | {
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| 118 | prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel,
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| 119 | rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel,
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| 120 | pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel,
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| 121 | fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask,
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| 122 | unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel,
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| 123 | lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel,
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| 124 | priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel,
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| 125 | priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when,
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| 126 | bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr,
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| 127 | rnat_psprel, rnat_sprel, epilogue, label_state, copy_state,
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| 128 | spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p,
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| 129 | spill_reg_p
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| 130 | } unw_record_type;
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| 131 |
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| 132 |
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| 133 | /* These structures declare the fields that can be used in each of the
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| 134 | 4 record formats, R, P, B and X. */
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| 135 |
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| 136 | typedef struct unw_r_record
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| 137 | {
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| 138 | unsigned long rlen;
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| 139 | unsigned short mask;
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| 140 | unsigned short grsave;
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| 141 | } unw_r_record;
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| 142 |
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| 143 | typedef struct unw_p_record
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| 144 | {
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| 145 | void *imask;
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| 146 | unsigned long t;
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| 147 | unsigned long size;
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| 148 | unsigned long spoff;
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| 149 | unsigned long br;
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| 150 | unsigned long pspoff;
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| 151 | unsigned short gr;
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| 152 | unsigned short rmask;
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| 153 | unsigned short grmask;
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| 154 | unsigned long frmask;
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| 155 | unsigned short brmask;
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| 156 | } unw_p_record;
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| 157 |
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| 158 | typedef struct unw_b_record
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| 159 | {
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| 160 | unsigned long t;
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| 161 | unsigned long label;
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| 162 | unsigned short ecount;
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| 163 | } unw_b_record;
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| 164 |
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| 165 | typedef struct unw_x_record
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| 166 | {
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| 167 | unsigned long t;
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| 168 | unsigned long spoff;
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| 169 | unsigned long pspoff;
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| 170 | unsigned short reg;
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| 171 | unsigned short treg;
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| 172 | unsigned short qp;
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| 173 | unsigned short xy; /* Value of the XY field.. */
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| 174 | } unw_x_record;
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| 175 |
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| 176 | /* This structure is used to determine the specific record type and
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| 177 | its fields. */
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| 178 | typedef struct unwind_record
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| 179 | {
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| 180 | unw_record_type type;
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| 181 | union {
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| 182 | unw_r_record r;
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| 183 | unw_p_record p;
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| 184 | unw_b_record b;
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| 185 | unw_x_record x;
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| 186 | } record;
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| 187 | } unwind_record;
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| 188 |
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| 189 | /* This structure represents the start of an unwind information pointer.
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| 190 | 'unwind_descriptors' is the beginninng of the unwind descriptors, which
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| 191 | use up 'length' bytes of storage. */
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| 192 |
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| 193 | typedef struct unwind_info_ptr
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| 194 | {
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| 195 | unsigned short version;
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| 196 | unsigned short flags;
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| 197 | unsigned int length;
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| 198 | unsigned char unwind_descriptors[1];
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| 199 | } unwind_info_ptr;
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| 200 |
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| 201 |
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| 202 | #define IA64_UNW_LOC_TYPE_NONE 0
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| 203 | #define IA64_UNW_LOC_TYPE_MEM 1
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| 204 | #define IA64_UNW_LOC_TYPE_GR 2
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| 205 | #define IA64_UNW_LOC_TYPE_FR 3
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| 206 | #define IA64_UNW_LOC_TYPE_BR 4
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| 207 | #define IA64_UNW_LOC_TYPE_SPOFF 5
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| 208 | #define IA64_UNW_LOC_TYPE_PSPOFF 6
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| 209 | #define IA64_UNW_LOC_TYPE_OFFSET 7
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| 210 | #define IA64_UNW_LOC_TYPE_SPILLBASE 8
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| 211 |
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| 212 | typedef struct ia64_reg_loc
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| 213 | {
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| 214 | long when; /* PC relative offset from start of function. */
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| 215 | union { /* In memory or another register? */
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| 216 | void *mem;
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| 217 | int regno;
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| 218 | int offset;
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| 219 | } l;
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| 220 | short loc_type; /* Where to find value. */
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| 221 | short reg_size;
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| 222 | } ia64_reg_loc;
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| 223 |
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| 224 | /* Frame information record. */
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| 225 |
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| 226 | typedef struct ia64_frame_state
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| 227 | {
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| 228 | ia64_reg_loc gr[4]; /* gr4 to gr7. */
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| 229 | ia64_reg_loc fr[20]; /* fr2 to fr5, fr16 to fr31. */
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| 230 | ia64_reg_loc br[5]; /* br1 to br5. */
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| 231 | ia64_reg_loc rp;
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| 232 | ia64_reg_loc fpsr;
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| 233 | ia64_reg_loc bsp;
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| 234 | ia64_reg_loc bspstore;
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| 235 | ia64_reg_loc rnat;
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| 236 | ia64_reg_loc pfs;
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| 237 | ia64_reg_loc unat;
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| 238 | ia64_reg_loc lc;
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| 239 | ia64_reg_loc pr;
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| 240 | ia64_reg_loc priunat;
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| 241 | ia64_reg_loc sp;
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| 242 | ia64_reg_loc psp;
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| 243 | ia64_reg_loc spill_base;
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| 244 | void *my_sp;
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| 245 | void *my_bsp;
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| 246 | } ia64_frame_state;
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| 247 |
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| 248 |
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| 249 | extern unwind_info_ptr *build_ia64_frame_state (unsigned char *, ia64_frame_state *,
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| 250 | void *, void *);
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| 251 | extern void *get_real_reg_value (ia64_reg_loc *);
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| 252 | extern void *get_personality (unwind_info_ptr *);
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| 253 | extern void *get_except_table (unwind_info_ptr *);
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| 254 | extern void set_real_reg_value (ia64_reg_loc *, void *);
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| 255 | void *calc_caller_bsp (long, unsigned char *);
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| 256 |
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| 257 | #endif /* IA64_UNWIND_INFO */
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| 258 |
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| 259 | /* Note the following routines are exported interfaces from libgcc; do not
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| 260 | change these interfaces. Instead create new interfaces. Also note
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| 261 | references to these functions may be made weak in files where they
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| 262 | are referenced. */
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| 263 |
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| 264 | extern void __register_frame (void * );
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| 265 | extern void __register_frame_table (void *);
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| 266 | extern void __deregister_frame (void *);
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| 267 |
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| 268 | /* Called either from crtbegin.o or a static constructor to register the
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| 269 | unwind info for an object or translation unit, respectively. */
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| 270 |
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| 271 | extern void __register_frame_info (void *, struct object *);
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| 272 |
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| 273 | /* Similar, but BEGIN is actually a pointer to a table of unwind entries
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| 274 | for different translation units. Called from the file generated by
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| 275 | collect2. */
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| 276 | extern void __register_frame_info_table (void *, struct object *);
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| 277 |
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| 278 | /* Called from crtend.o to deregister the unwind info for an object. */
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| 279 |
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| 280 | extern void *__deregister_frame_info (void *);
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| 281 |
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| 282 |
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