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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [config/] [i386/] [sol2-unwind.h] - Blame information for rev 734

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1 734 jeremybenn
/* DWARF2 EH unwinding support for AMD x86-64 and x86.
2
   Copyright (C) 2009, 2010 Free Software Foundation, Inc.
3
 
4
This file is part of GCC.
5
 
6
GCC is free software; you can redistribute it and/or modify
7
it under the terms of the GNU General Public License as published by
8
the Free Software Foundation; either version 3, or (at your option)
9
any later version.
10
 
11
GCC is distributed in the hope that it will be useful,
12
but WITHOUT ANY WARRANTY; without even the implied warranty of
13
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
GNU General Public License for more details.
15
 
16
Under Section 7 of GPL version 3, you are granted additional
17
permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
19
 
20
You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
22
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23
<http://www.gnu.org/licenses/>.  */
24
 
25
/* Do code reading to identify a signal frame, and set the frame
26
   state data appropriately.  See unwind-dw2.c for the structs.  */
27
 
28
#include <ucontext.h>
29
#include <sys/frame.h>
30
 
31
#ifdef __x86_64__
32
 
33
#define MD_FALLBACK_FRAME_STATE_FOR x86_64_fallback_frame_state
34
 
35
static _Unwind_Reason_Code
36
x86_64_fallback_frame_state (struct _Unwind_Context *context,
37
                             _Unwind_FrameState *fs)
38
{
39
  unsigned char *pc = context->ra;
40
  mcontext_t *mctx;
41
  long new_cfa;
42
 
43
  if (/* Solaris 10+
44
        ------------
45
        <__sighndlr+0>:      push   %rbp
46
        <__sighndlr+1>:      mov    %rsp,%rbp
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        <__sighndlr+4>:      callq  *%rcx
48
        <__sighndlr+6>:      leaveq           <--- PC
49
        <__sighndlr+7>:      retq  */
50
      *(unsigned long *)(pc - 6) == 0xc3c9d1ffe5894855)
51
 
52
    /* We need to move up three frames:
53
 
54
                <signal handler>        <-- context->cfa
55
                __sighndlr
56
                call_user_handler
57
                sigacthandler
58
                <kernel>
59
 
60
       context->cfa points into the frame after the saved frame pointer and
61
       saved pc (struct frame).
62
 
63
       The ucontext_t structure is in the kernel frame after the signal
64
       number and a siginfo_t *.  Since the frame sizes vary even within
65
       Solaris 10 updates, we need to walk the stack to get there.  */
66
    {
67
      struct frame *fp = (struct frame *) context->cfa - 1;
68
      struct handler_args {
69
        int signo;
70
        siginfo_t *sip;
71
        ucontext_t ucontext;
72
      } *handler_args;
73
      ucontext_t *ucp;
74
 
75
      /* Next frame: __sighndlr frame pointer.  */
76
      fp = (struct frame *) fp->fr_savfp;
77
      /* call_user_handler frame pointer.  */
78
      fp = (struct frame *) fp->fr_savfp;
79
      /* sigacthandler frame pointer.  */
80
      fp = (struct frame *) fp->fr_savfp;
81
 
82
      /* The argument area precedes the struct frame.  */
83
      handler_args = (struct handler_args *) (fp + 1);
84
      ucp = &handler_args->ucontext;
85
      mctx = &ucp->uc_mcontext;
86
    }
87
  else
88
    return _URC_END_OF_STACK;
89
 
90
  new_cfa = mctx->gregs[REG_RSP];
91
 
92
  fs->regs.cfa_how = CFA_REG_OFFSET;
93
  fs->regs.cfa_reg = 7;
94
  fs->regs.cfa_offset = new_cfa - (long) context->cfa;
95
 
96
  /* The SVR4 register numbering macros aren't usable in libgcc.  */
97
  fs->regs.reg[0].how = REG_SAVED_OFFSET;
98
  fs->regs.reg[0].loc.offset = (long)&mctx->gregs[REG_RAX] - new_cfa;
99
  fs->regs.reg[1].how = REG_SAVED_OFFSET;
100
  fs->regs.reg[1].loc.offset = (long)&mctx->gregs[REG_RDX] - new_cfa;
101
  fs->regs.reg[2].how = REG_SAVED_OFFSET;
102
  fs->regs.reg[2].loc.offset = (long)&mctx->gregs[REG_RCX] - new_cfa;
103
  fs->regs.reg[3].how = REG_SAVED_OFFSET;
104
  fs->regs.reg[3].loc.offset = (long)&mctx->gregs[REG_RBX] - new_cfa;
105
  fs->regs.reg[4].how = REG_SAVED_OFFSET;
106
  fs->regs.reg[4].loc.offset = (long)&mctx->gregs[REG_RSI] - new_cfa;
107
  fs->regs.reg[5].how = REG_SAVED_OFFSET;
108
  fs->regs.reg[5].loc.offset = (long)&mctx->gregs[REG_RDI] - new_cfa;
109
  fs->regs.reg[6].how = REG_SAVED_OFFSET;
110
  fs->regs.reg[6].loc.offset = (long)&mctx->gregs[REG_RBP] - new_cfa;
111
  fs->regs.reg[8].how = REG_SAVED_OFFSET;
112
  fs->regs.reg[8].loc.offset = (long)&mctx->gregs[REG_R8] - new_cfa;
113
  fs->regs.reg[9].how = REG_SAVED_OFFSET;
114
  fs->regs.reg[9].loc.offset = (long)&mctx->gregs[REG_R9] - new_cfa;
115
  fs->regs.reg[10].how = REG_SAVED_OFFSET;
116
  fs->regs.reg[10].loc.offset = (long)&mctx->gregs[REG_R10] - new_cfa;
117
  fs->regs.reg[11].how = REG_SAVED_OFFSET;
118
  fs->regs.reg[11].loc.offset = (long)&mctx->gregs[REG_R11] - new_cfa;
119
  fs->regs.reg[12].how = REG_SAVED_OFFSET;
120
  fs->regs.reg[12].loc.offset = (long)&mctx->gregs[REG_R12] - new_cfa;
121
  fs->regs.reg[13].how = REG_SAVED_OFFSET;
122
  fs->regs.reg[13].loc.offset = (long)&mctx->gregs[REG_R13] - new_cfa;
123
  fs->regs.reg[14].how = REG_SAVED_OFFSET;
124
  fs->regs.reg[14].loc.offset = (long)&mctx->gregs[REG_R14] - new_cfa;
125
  fs->regs.reg[15].how = REG_SAVED_OFFSET;
126
  fs->regs.reg[15].loc.offset = (long)&mctx->gregs[REG_R15] - new_cfa;
127
  fs->regs.reg[16].how = REG_SAVED_OFFSET;
128
  fs->regs.reg[16].loc.offset = (long)&mctx->gregs[REG_RIP] - new_cfa;
129
  fs->retaddr_column = 16;
130
  fs->signal_frame = 1;
131
 
132
  return _URC_NO_REASON;
133
}
134
 
135
#else
136
 
137
#define MD_FALLBACK_FRAME_STATE_FOR x86_fallback_frame_state
138
 
139
static _Unwind_Reason_Code
140
x86_fallback_frame_state (struct _Unwind_Context *context,
141
                          _Unwind_FrameState *fs)
142
{
143
  unsigned char *pc = context->ra;
144
  mcontext_t *mctx;
145
  long new_cfa;
146
 
147
  if (/* Solaris 8 - single-threaded
148
        ----------------------------
149
        <sigacthandler+17>:  mov    0x10(%ebp),%esi
150
        <sigacthandler+20>:  push   %esi
151
        <sigacthandler+21>:  pushl  0xc(%ebp)
152
        <sigacthandler+24>:  mov    0x8(%ebp),%ecx
153
        <sigacthandler+27>:  push   %ecx
154
        <sigacthandler+28>:  mov    offset(%ebx),%eax
155
        <sigacthandler+34>:  call   *(%eax,%ecx,4)
156
        <sigacthandler+37>:  add    $0xc,%esp        <--- PC
157
        <sigacthandler+40>:  push   %esi ... */
158
      (*(unsigned long *)(pc - 20) == 0x5610758b
159
       && *(unsigned long *)(pc - 16) == 0x8b0c75ff
160
       && *(unsigned long *)(pc - 12) == 0x8b51084d
161
       && *(unsigned char *)(pc - 8)  == 0x83
162
       && *(unsigned long *)(pc - 4)  == 0x8814ff00
163
       && *(unsigned long *)(pc - 0)  == 0x560cc483)
164
 
165
      || /* Solaris 8 - multi-threaded
166
           ---------------------------
167
           <__sighndlr+0>:      push   %ebp
168
           <__sighndlr+1>:      mov    %esp,%ebp
169
           <__sighndlr+3>:      pushl  0x10(%ebp)
170
           <__sighndlr+6>:      pushl  0xc(%ebp)
171
           <__sighndlr+9>:      pushl  0x8(%ebp)
172
           <__sighndlr+12>:     call   *0x14(%ebp)
173
           <__sighndlr+15>:     leave               <--- PC  */
174
         (*(unsigned long *)(pc - 15) == 0xffec8b55
175
          && *(unsigned long *)(pc - 11) == 0x75ff1075
176
          && *(unsigned long *)(pc - 7)  == 0x0875ff0c
177
          && *(unsigned long *)(pc - 3)  == 0xc91455ff)
178
 
179
      || /* Solaris 9 - single-threaded
180
           ----------------------------
181
           <sigacthandler+16>:    mov    0x244(%ebx),%ecx
182
           <sigacthandler+22>:    mov    0x8(%ebp),%eax
183
           <sigacthandler+25>:    mov    (%ecx,%eax,4),%ecx
184
           <sigacthandler+28>:    pushl  0x10(%ebp)
185
           <sigacthandler+31>:    pushl  0xc(%ebp)
186
           <sigacthandler+34>:    push   %eax
187
           <sigacthandler+35>:    call   *%ecx
188
           <sigacthandler+37>:    add    $0xc,%esp      <--- PC
189
           <sigacthandler+40>:    pushl  0x10(%ebp) */
190
         (*(unsigned long *)(pc - 21) == 0x2448b8b
191
          && *(unsigned long *)(pc - 17) == 0x458b0000
192
          && *(unsigned long *)(pc - 13) == 0x810c8b08
193
          && *(unsigned long *)(pc - 9)  == 0xff1075ff
194
          && *(unsigned long *)(pc - 5)  == 0xff500c75
195
          && *(unsigned long *)(pc - 1)  == 0xcc483d1)
196
 
197
      || /* Solaris 9 - multi-threaded, Solaris 10
198
           ---------------------------------------
199
           <__sighndlr+0>:      push   %ebp
200
           <__sighndlr+1>:      mov    %esp,%ebp
201
           <__sighndlr+3>:      pushl  0x10(%ebp)
202
           <__sighndlr+6>:      pushl  0xc(%ebp)
203
           <__sighndlr+9>:      pushl  0x8(%ebp)
204
           <__sighndlr+12>:     call   *0x14(%ebp)
205
           <__sighndlr+15>:     add    $0xc,%esp     <--- PC
206
           <__sighndlr+18>:     leave
207
           <__sighndlr+19>:     ret  */
208
         (*(unsigned long *)(pc - 15) == 0xffec8b55
209
          && *(unsigned long *)(pc - 11) == 0x75ff1075
210
          && *(unsigned long *)(pc - 7)  == 0x0875ff0c
211
          && *(unsigned long *)(pc - 3)  == 0x831455ff
212
          && *(unsigned long *)(pc + 1)  == 0xc3c90cc4)
213
 
214
      || /* Solaris 11 before snv_125
215
           --------------------------
216
          <__sighndlr+0>        push   %ebp
217
          <__sighndlr+1>        mov    %esp,%ebp
218
          <__sighndlr+4>        pushl  0x10(%ebp)
219
          <__sighndlr+6>        pushl  0xc(%ebp)
220
          <__sighndlr+9>        pushl  0x8(%ebp)
221
          <__sighndlr+12>       call   *0x14(%ebp)
222
          <__sighndlr+15>       add    $0xc,%esp
223
          <__sighndlr+18>       leave                <--- PC
224
          <__sighndlr+19>       ret  */
225
         (*(unsigned long *)(pc - 18) == 0xffec8b55
226
          && *(unsigned long *)(pc - 14) == 0x7fff107f
227
          && *(unsigned long *)(pc - 10)  == 0x0875ff0c
228
          && *(unsigned long *)(pc - 6)  == 0x83145fff
229
          && *(unsigned long *)(pc - 1)  == 0xc3c90cc4)
230
 
231
      || /* Solaris 11 since snv_125
232
           -------------------------
233
          <__sighndlr+0>        push   %ebp
234
          <__sighndlr+1>        mov    %esp,%ebp
235
          <__sighndlr+3>        and    $0xfffffff0,%esp
236
          <__sighndlr+6>        sub    $0x4,%esp
237
          <__sighndlr+9>        pushl  0x10(%ebp)
238
          <__sighndlr+12>       pushl  0xc(%ebp)
239
          <__sighndlr+15>       pushl  0x8(%ebp)
240
          <__sighndlr+18>       call   *0x14(%ebp)
241
          <__sighndlr+21>       leave                <--- PC
242
          <__sighndlr+22>       ret  */
243
         (*(unsigned long *)(pc - 21) == 0x83ec8b55
244
          && *(unsigned long *)(pc - 17) == 0xec83f0e4
245
          && *(unsigned long *)(pc - 13)  == 0x1075ff04
246
          && *(unsigned long *)(pc - 9)  == 0xff0c75ff
247
          && *(unsigned long *)(pc - 5)  == 0x55ff0875
248
          && (*(unsigned long *)(pc - 1) & 0x00ffffff) == 0x00c3c914))
249
    {
250
      struct handler_args {
251
        int signo;
252
        siginfo_t *sip;
253
        ucontext_t *ucontext;
254
      } *handler_args = context->cfa;
255
      mctx = &handler_args->ucontext->uc_mcontext;
256
    }
257
  else
258
    return _URC_END_OF_STACK;
259
 
260
  new_cfa = mctx->gregs[UESP];
261
 
262
  fs->regs.cfa_how = CFA_REG_OFFSET;
263
  fs->regs.cfa_reg = 4;
264
  fs->regs.cfa_offset = new_cfa - (long) context->cfa;
265
 
266
  /* The SVR4 register numbering macros aren't usable in libgcc.  */
267
  fs->regs.reg[0].how = REG_SAVED_OFFSET;
268
  fs->regs.reg[0].loc.offset = (long)&mctx->gregs[EAX] - new_cfa;
269
  fs->regs.reg[3].how = REG_SAVED_OFFSET;
270
  fs->regs.reg[3].loc.offset = (long)&mctx->gregs[EBX] - new_cfa;
271
  fs->regs.reg[1].how = REG_SAVED_OFFSET;
272
  fs->regs.reg[1].loc.offset = (long)&mctx->gregs[ECX] - new_cfa;
273
  fs->regs.reg[2].how = REG_SAVED_OFFSET;
274
  fs->regs.reg[2].loc.offset = (long)&mctx->gregs[EDX] - new_cfa;
275
  fs->regs.reg[6].how = REG_SAVED_OFFSET;
276
  fs->regs.reg[6].loc.offset = (long)&mctx->gregs[ESI] - new_cfa;
277
  fs->regs.reg[7].how = REG_SAVED_OFFSET;
278
  fs->regs.reg[7].loc.offset = (long)&mctx->gregs[EDI] - new_cfa;
279
  fs->regs.reg[5].how = REG_SAVED_OFFSET;
280
  fs->regs.reg[5].loc.offset = (long)&mctx->gregs[EBP] - new_cfa;
281
  fs->regs.reg[8].how = REG_SAVED_OFFSET;
282
  fs->regs.reg[8].loc.offset = (long)&mctx->gregs[EIP] - new_cfa;
283
  fs->retaddr_column = 8;
284
  fs->signal_frame = 1;
285
 
286
  return _URC_NO_REASON;
287
}
288
 
289
#endif

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