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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [i386/] [sol2-unwind.h] - Blame information for rev 473

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1 282 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
47 
        <__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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