Mercurial > hg > CbC > CbC_gcc

annotate gcc/config/ia64/vms-unwind.h @ 55:77e2b8dfacca gcc-4.4.5

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update it from 4.4.3 to 4.5.0
author ryoma <e075725@ie.u-ryukyu.ac.jp>
date Fri, 12 Feb 2010 23:39:51 +0900
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children
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55
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1 /* DWARF2 EH unwinding support for IA64 VMS.
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2 Copyright (C) 2005-2009 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published
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8 by the Free Software Foundation; either version 3, or (at your
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9 option) any later version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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14 License for more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25 #include <vms/libicb.h>
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26 #include <vms/chfdef.h>
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27 #include <vms/chfctxdef.h>
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28
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29 #define __int64 long long
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30 #include <vms/intstkdef.h>
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31
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32 #include <stdio.h>
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33 #include <string.h>
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34
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35 #define DYN$C_SSENTRY 66
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36 /* ??? would rather get the proper header file. */
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37
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38 #define MD_FALLBACK_FRAME_STATE_FOR ia64_vms_fallback_frame_state
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39
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40 extern INVO_CONTEXT_BLK * LIB$I64_CREATE_INVO_CONTEXT (void);
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41
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42 extern int LIB$I64_IS_EXC_DISPATCH_FRAME (void *);
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43 extern int LIB$I64_IS_AST_DISPATCH_FRAME (void *);
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44
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45 extern int LIB$I64_INIT_INVO_CONTEXT (INVO_CONTEXT_BLK *, int, int);
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46 extern int LIB$I64_GET_CURR_INVO_CONTEXT (INVO_CONTEXT_BLK *);
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47 extern int LIB$I64_GET_PREV_INVO_CONTEXT (INVO_CONTEXT_BLK *);
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48
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49 typedef unsigned long ulong;
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50 typedef unsigned int uint;
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51 typedef unsigned long uw_reg;
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52 typedef uw_reg * uw_loc;
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53
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54 typedef char fp_reg[16];
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55
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56 #define DENOTES_VMS_DISPATCHER_FRAME(icb) \
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57 (LIB$I64_IS_EXC_DISPATCH_FRAME (&(icb)->libicb$ih_pc))
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58
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59 #define DENOTES_BOTTOM_OF_STACK(icb) ((icb)->libicb$v_bottom_of_stack)
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60
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61 #define FAIL_IF(COND) \
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62 do { if (COND) { context->rp = 0; return _URC_END_OF_STACK; } } while (0)
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63 /* Clearing context->rp is required to prevent the ia64 gcc unwinder from
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64 attempting to keep on walking the call chain. */
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65
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66 static int
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67 ia64_vms_fallback_frame_state (struct _Unwind_Context *context,
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68 _Unwind_FrameState *fs)
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69 {
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70 int i, status;
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71
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72 INVO_CONTEXT_BLK local_icb;
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73 INVO_CONTEXT_BLK *icb = &local_icb;
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74
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75 CHFCTX * chfctx;
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76 CHF$MECH_ARRAY * chfmech;
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77 CHF64$SIGNAL_ARRAY *chfsig64;
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78 INTSTK * intstk;
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79
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80 static int eh_debug = -1;
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81 int try_bs_copy = 0;
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82 /* Non zero to attempt copy of alternate backing store contents for
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83 dirty partition in interrupted context. ??? Alpha code, only activated
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84 on specific request via specific bit in EH_DEBUG. */
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85
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86 if (eh_debug == -1)
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87 {
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88 char * EH_DEBUG = getenv ("EH_DEBUG");
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89 const uint try_bs_copy_mask = (1 << 16);
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90
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91 eh_debug = EH_DEBUG ? atoi (EH_DEBUG) : 0;
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92
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93 /* Fetch and clear the try_bs_copy bit. */
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94 try_bs_copy = (uint)eh_debug & try_bs_copy_mask;
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95 eh_debug &= ~try_bs_copy_mask;
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96 }
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97
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98 /* We're called to attempt unwinding through a frame for which no unwind
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99 info is available, typical of an operating system exception dispatcher
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100 frame. The code below knows how to handle this case, and only this one,
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101 returning a failure code if it finds it is not in this situation.
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102
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103 Note that we're called from deep down in the exception propagation call
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104 chain, possibly below an exception dispatcher but for a frame above it
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105 like some os entry point. */
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106
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107 if (eh_debug)
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108 printf ("FALLBACK - ctxt->rp=0x%lx, sp=0x%lx, psp=0x%lx, bsp=0x%lx\n",
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109 context->rp, context->sp, context->psp, context->bsp);
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110
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111 /* Step 0 :
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112 -------------------------------------------------------------------------
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113 VMS-unwind up until we reach a VMS dispatcher frame corresponding to the
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114 context we are trying to unwind through. Fail if get past this context or
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115 if we reach the bottom of stack along the way.
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116 -------------------------------------------------------------------------
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117 */
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118
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119 status = LIB$I64_INIT_INVO_CONTEXT (icb, LIBICB$K_INVO_CONTEXT_VERSION, 0);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
120 FAIL_IF (status == 0);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
121
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
122 status = LIB$I64_GET_CURR_INVO_CONTEXT (icb);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
123
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
124 /* Beware: we might be unwinding through nested condition handlers, so the
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
125 dispatcher frame we seek might not be the first one on the way up. Loop
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
126 thus. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
127 do {
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
128
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
129 /* Seek the next dispatcher frame up the "current" point. Stop if we
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
130 either get past the target context or hit the bottom-of-stack along
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
131 the way. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
132 status = LIB$I64_GET_PREV_INVO_CONTEXT (icb);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
133 FAIL_IF (status == 0);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
134 FAIL_IF ((uw_reg)icb->libicb$ih_sp > (uw_reg)context->psp
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
135 || DENOTES_BOTTOM_OF_STACK (icb));
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
136
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
137 if (eh_debug)
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138 printf ("frame%s sp @ 0x%llx, pc @ 0x%llx bsp=0x%llx\n",
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 DENOTES_VMS_DISPATCHER_FRAME (icb) ? " (dispatcher)" : "",
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 icb->libicb$ih_sp, icb->libicb$ih_pc, icb->libicb$ih_bsp);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
141
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
142 /* Continue until the target frame is found. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
143 } while ((uw_reg)icb->libicb$ih_bsp != (uw_reg)context->bsp);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
144
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 /* If this is not a dispatcher frame, this is certainly a frame for a leaf
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146 subprogram. Use default unwind information. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
147 if (! DENOTES_VMS_DISPATCHER_FRAME (icb))
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 return _URC_END_OF_STACK;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150 /* At this point, we know we are really trying to unwind past an exception
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 dispatcher frame, and have it described in ICB. Proceed. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
153 /* Step 1 :
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
154 ------------------------------------------------------------------------
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
155 We have the VMS dispatcher frame ICB handy and know we are trying to
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 unwind past it. Fetch pointers to useful datastructures from there, then
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 unwind one step further up to the interrupted user context from which
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
158 some required values will be easily accessible.
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 ------------------------------------------------------------------------
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
160 */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
161
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
162 chfctx = icb->libicb$ph_chfctx_addr;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 FAIL_IF (chfctx == 0);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
164
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
165 chfmech = (CHF$MECH_ARRAY *)chfctx->chfctx$q_mcharglst;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
166 FAIL_IF (chfmech == 0);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
167
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
168 chfsig64 = (CHF64$SIGNAL_ARRAY *)chfmech->chf$ph_mch_sig64_addr;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
169 FAIL_IF (chfsig64 == 0);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
170
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
171 intstk = (INTSTK *)chfmech->chf$q_mch_esf_addr;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 FAIL_IF (intstk == 0 || intstk->intstk$b_subtype == DYN$C_SSENTRY);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
173
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
174 status = LIB$I64_GET_PREV_INVO_CONTEXT (icb);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
175 FAIL_IF (status == 0);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
176
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 if (eh_debug)
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
178 printf ("User frame, "
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 "chfmech @ 0x%lx, chfsig64 @ 0x%lx, intstk @ 0x%lx\n",
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 (ulong)chfmech, (ulong)chfsig64, (ulong)intstk);
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
181
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
182 /* Step 2 :
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
183 ------------------------------------------------------------------------
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
184 Point the GCC context locations/values required for further unwinding at
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
185 their corresponding locations/values in the datastructures at hand.
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
186 ------------------------------------------------------------------------
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
187 */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
189 /* Static General Register locations, including scratch registers in case
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
190 the unwinder needs to refer to a value stored in one of them. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
191 {
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
192 uw_reg * ctxregs = (uw_reg *)&intstk->intstk$q_regbase;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
193
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
194 for (i = 2; i <= 3; i++)
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
195 context->ireg[i - 2].loc = (uw_loc)&ctxregs[i];
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
196 for (i = 8; i <= 11; i++)
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
197 context->ireg[i - 2].loc = (uw_loc)&ctxregs[i];
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
198 for (i = 14; i <= 31; i++)
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
199 context->ireg[i - 2].loc = (uw_loc)&ctxregs[i];
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
200 }
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
201
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
202 /* Static Floating Point Register locations, as available from the
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
203 mechargs array, which happens to include all the to be preserved
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
204 ones + others. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
205 {
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
206 fp_reg * ctxregs;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
207
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
208 ctxregs = (fp_reg *)&chfmech->chf$fh_mch_savf2;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
209 for (i = 2; i <= 5 ; i++)
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
210 context->fr_loc[i - 2] = (uw_loc)&ctxregs[i - 2];
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
211
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
212 ctxregs = (fp_reg *)&chfmech->chf$fh_mch_savf12;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
213 for (i = 12; i <= 31 ; i++)
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
214 context->fr_loc[i - 2] = (uw_loc)&ctxregs[i - 12];
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
215 }
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
216
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
217 /* Relevant application register locations. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
218
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
219 context->fpsr_loc = (uw_loc)&intstk->intstk$q_fpsr;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
220 context->lc_loc = (uw_loc)&intstk->intstk$q_lc;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
221 context->unat_loc = (uw_loc)&intstk->intstk$q_unat;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
222
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
223 /* Branch register locations. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
224
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
225 {
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
226 uw_reg * ctxregs = (uw_reg *)&intstk->intstk$q_b0;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
227
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
228 for (i = 0; i < 8; i++)
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
229 context->br_loc[i] = (uw_loc)&ctxregs[i];
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
230 }
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
231
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
232 /* Necessary register values. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
233
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
234 /* ??? Still unclear if we need to account for possible flushes to an
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
235 alternate backing store (maybe the unwinding performed above did the
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
236 trick already) and how this would be handled. Blind alpha tentative
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
237 below for experimentation purposes in malfunctioning cases. */
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
238 {
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
239 ulong q_bsp = (ulong) intstk->intstk$q_bsp;
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
240 ulong q_bspstore = (ulong) intstk->intstk$q_bspstore;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
241 ulong q_bspbase = (ulong) intstk->intstk$q_bspbase;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
242 ulong ih_bspbase = (ulong) icb->libicb$ih_bspbase;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
243
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
244 if (eh_debug)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
245 printf ("q_bspstore = 0x%lx, q_bsp = 0x%lx, q_bspbase = 0x%lx\n"
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
246 "ih_bspbase = 0x%lx\n",
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
247 q_bspstore, q_bsp, q_bspbase, ih_bspbase);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
248
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
249 /* We witness many situations where q_bspbase is set while ih_bspbase is
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
250 null, and every attempt made with q_bspbase badly failed while doing
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
251 nothing resulted in proper behavior. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
252 if (q_bspstore < q_bsp && ih_bspbase && try_bs_copy)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
253 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
254 ulong dirty_size = q_bsp - q_bspstore;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
255 ulong q_rnat = (ulong) intstk->intstk$q_rnat;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
256
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
257 if (eh_debug)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
258 printf ("Attempting an alternate backing store copy ...\n");
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
259
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
260 ia64_copy_rbs
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
261 (context, q_bspstore, ih_bspbase, dirty_size, q_rnat);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
262 /* Not clear if these are the proper arguments here. This is what
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
263 looked the closest to what is performed in the Linux case. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
264 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
265
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
266 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
267
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
268 context->bsp = (uw_reg)intstk->intstk$q_bsp;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
269 fs->no_reg_stack_frame = 1;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
270
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
271 context->pr = (uw_reg)intstk->intstk$q_preds;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
272 context->gp = (uw_reg)intstk->intstk$q_gp;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
273
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
274 /* We're directly setting up the "context" for a VMS exception handler.
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
275 The "previous SP" for it is the SP upon the handler's entry, that is
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
276 the SP at the condition/interruption/exception point. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
277 context->psp = (uw_reg)icb->libicb$ih_sp;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
278
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
279 /* Previous Frame State location. What eventually ends up in pfs_loc is
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
280 installed with ar.pfs = pfs_loc; br.ret; so setup to target intstk->q_ifs
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
281 to have the interrupted context restored and not that of its caller if
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
282 we happen to have a handler in the interrupted context itself. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
283 fs->curr.reg[UNW_REG_PFS].where = UNW_WHERE_PSPREL;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
284 fs->curr.reg[UNW_REG_PFS].val
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
285 = (uw_reg)&intstk->intstk$q_ifs - (uw_reg)context->psp;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
286 fs->curr.reg[UNW_REG_PFS].when = -1;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
287
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
288 /* If we need to unwind further up, past the interrupted context, we need to
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
289 hand out the interrupted context's pfs, still. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
290 context->signal_pfs_loc = (uw_loc) &intstk->intstk$q_pfs;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
291
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
292 /* Finally, rules for RP . */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
293 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
294 uw_reg * post_sigarray
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
295 = (uw_reg *)chfsig64 + 1 + chfsig64->chf64$l_sig_args;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
296
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
297 uw_reg * ih_pc_loc = post_sigarray - 2;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
298
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
299 fs->curr.reg[UNW_REG_RP].where = UNW_WHERE_PSPREL;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
300 fs->curr.reg[UNW_REG_RP].val
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
301 = (uw_reg)ih_pc_loc - (uw_reg)context->psp;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
302 fs->curr.reg[UNW_REG_RP].when = -1;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
303 }
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
304
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
305 return _URC_NO_REASON;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
306 }
77e2b8dfacca update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
307