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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
18 
3.1, as published by the Free Software Foundation.
19 
 
20 
You should have received a copy of the GNU General Public License and
21 
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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