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comparison gcc/config/i386/sol2-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 f6334be47118
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52:c156f1bd5cd9 55:77e2b8dfacca
1 /* DWARF2 EH unwinding support for AMD x86-64 and x86.
2 Copyright (C) 2009 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
30 #ifdef __x86_64__
31
32 #define MD_FALLBACK_FRAME_STATE_FOR x86_64_fallback_frame_state
33
34 static _Unwind_Reason_Code
35 x86_64_fallback_frame_state (struct _Unwind_Context *context,
36 _Unwind_FrameState *fs)
37 {
38 unsigned char *pc = context->ra;
39 mcontext_t *mctx;
40 long new_cfa;
41
42 if (/* Solaris 2.10
43 ------------
44 <__sighndlr+0>: push %rbp
45 <__sighndlr+1>: mov %rsp,%rbp
46 <__sighndlr+4>: callq *%rcx
47 <__sighndlr+6>: leaveq <--- PC
48 <__sighndlr+7>: retq */
49 *(unsigned long *)(pc - 6) == 0xc3c9d1ffe5894855)
50 /* We need to move up four frames (the kernel frame, the signal frame,
51 the call_user_handler frame and the __sighndlr frame). Two of them
52 have the minimum stack frame size (kernel and __sighndlr frames),
53 the signal frame has a stack frame size of 32 and there is another
54 with a stack frame size of 112 bytes (the call_user_handler frame).
55 The ucontext_t structure is after this offset. */
56 {
57 int off = 16 + 16 + 32 + 112;
58 mctx = &((ucontext_t *) (context->cfa + off))->uc_mcontext;
59 }
60 else
61 return _URC_END_OF_STACK;
62
63 new_cfa = mctx->gregs[REG_RSP];
64
65 fs->regs.cfa_how = CFA_REG_OFFSET;
66 fs->regs.cfa_reg = 7;
67 fs->regs.cfa_offset = new_cfa - (long) context->cfa;
68
69 /* The SVR4 register numbering macros aren't usable in libgcc. */
70 fs->regs.reg[0].how = REG_SAVED_OFFSET;
71 fs->regs.reg[0].loc.offset = (long)&mctx->gregs[REG_RAX] - new_cfa;
72 fs->regs.reg[1].how = REG_SAVED_OFFSET;
73 fs->regs.reg[1].loc.offset = (long)&mctx->gregs[REG_RDX] - new_cfa;
74 fs->regs.reg[2].how = REG_SAVED_OFFSET;
75 fs->regs.reg[2].loc.offset = (long)&mctx->gregs[REG_RCX] - new_cfa;
76 fs->regs.reg[3].how = REG_SAVED_OFFSET;
77 fs->regs.reg[3].loc.offset = (long)&mctx->gregs[REG_RBX] - new_cfa;
78 fs->regs.reg[4].how = REG_SAVED_OFFSET;
79 fs->regs.reg[4].loc.offset = (long)&mctx->gregs[REG_RSI] - new_cfa;
80 fs->regs.reg[5].how = REG_SAVED_OFFSET;
81 fs->regs.reg[5].loc.offset = (long)&mctx->gregs[REG_RDI] - new_cfa;
82 fs->regs.reg[6].how = REG_SAVED_OFFSET;
83 fs->regs.reg[6].loc.offset = (long)&mctx->gregs[REG_RBP] - new_cfa;
84 fs->regs.reg[8].how = REG_SAVED_OFFSET;
85 fs->regs.reg[8].loc.offset = (long)&mctx->gregs[REG_R8] - new_cfa;
86 fs->regs.reg[9].how = REG_SAVED_OFFSET;
87 fs->regs.reg[9].loc.offset = (long)&mctx->gregs[REG_R9] - new_cfa;
88 fs->regs.reg[10].how = REG_SAVED_OFFSET;
89 fs->regs.reg[10].loc.offset = (long)&mctx->gregs[REG_R10] - new_cfa;
90 fs->regs.reg[11].how = REG_SAVED_OFFSET;
91 fs->regs.reg[11].loc.offset = (long)&mctx->gregs[REG_R11] - new_cfa;
92 fs->regs.reg[12].how = REG_SAVED_OFFSET;
93 fs->regs.reg[12].loc.offset = (long)&mctx->gregs[REG_R12] - new_cfa;
94 fs->regs.reg[13].how = REG_SAVED_OFFSET;
95 fs->regs.reg[13].loc.offset = (long)&mctx->gregs[REG_R13] - new_cfa;
96 fs->regs.reg[14].how = REG_SAVED_OFFSET;
97 fs->regs.reg[14].loc.offset = (long)&mctx->gregs[REG_R14] - new_cfa;
98 fs->regs.reg[15].how = REG_SAVED_OFFSET;
99 fs->regs.reg[15].loc.offset = (long)&mctx->gregs[REG_R15] - new_cfa;
100 fs->regs.reg[16].how = REG_SAVED_OFFSET;
101 fs->regs.reg[16].loc.offset = (long)&mctx->gregs[REG_RIP] - new_cfa;
102 fs->retaddr_column = 16;
103 fs->signal_frame = 1;
104
105 return _URC_NO_REASON;
106 }
107
108 #else
109
110 #define MD_FALLBACK_FRAME_STATE_FOR x86_fallback_frame_state
111
112 static _Unwind_Reason_Code
113 x86_fallback_frame_state (struct _Unwind_Context *context,
114 _Unwind_FrameState *fs)
115 {
116 unsigned char *pc = context->ra;
117 mcontext_t *mctx;
118 long new_cfa;
119
120 if (/* Solaris 2.8 - single thread
121 -------------------------
122 <sigacthandler+17>: mov 0x10(%ebp),%esi
123 <sigacthandler+20>: push %esi
124 <sigacthandler+21>: pushl 0xc(%ebp)
125 <sigacthandler+24>: mov 0x8(%ebp),%ecx
126 <sigacthandler+27>: push %ecx
127 <sigacthandler+28>: mov offset(%ebx),%eax
128 <sigacthandler+34>: call *(%eax,%ecx,4)
129 <sigacthandler+37>: add $0xc,%esp <--- PC
130 <sigacthandler+40>: push %esi ... */
131 (*(unsigned long *)(pc - 20) == 0x5610758b
132 && *(unsigned long *)(pc - 16) == 0x8b0c75ff
133 && *(unsigned long *)(pc - 12) == 0x8b51084d
134 && *(unsigned char *)(pc - 8) == 0x83
135 && *(unsigned long *)(pc - 4) == 0x8814ff00
136 && *(unsigned long *)(pc - 0) == 0x560cc483)
137
138 || /* Solaris 2.8 - multi thread
139 ---------------------------
140 <__sighndlr+0>: push %ebp
141 <__sighndlr+1>: mov %esp,%ebp
142 <__sighndlr+3>: pushl 0x10(%ebp)
143 <__sighndlr+6>: pushl 0xc(%ebp)
144 <__sighndlr+9>: pushl 0x8(%ebp)
145 <__sighndlr+12>: call *0x14(%ebp)
146 <__sighndlr+15>: leave <--- PC */
147 (*(unsigned long *)(pc - 15) == 0xffec8b55
148 && *(unsigned long *)(pc - 11) == 0x75ff1075
149 && *(unsigned long *)(pc - 7) == 0x0875ff0c
150 && *(unsigned long *)(pc - 3) == 0xc91455ff)
151
152 || /* Solaris 2.10
153 ------------
154 <__sighndlr+0>: push %ebp
155 <__sighndlr+1>: mov %esp,%ebp
156 <__sighndlr+3>: pushl 0x10(%ebp)
157 <__sighndlr+6>: pushl 0xc(%ebp)
158 <__sighndlr+9>: pushl 0x8(%ebp)
159 <__sighndlr+12>: call *0x14(%ebp)
160 <__sighndlr+15>: add $0xc,%esp <--- PC
161 <__sighndlr+18>: leave
162 <__sighndlr+19>: ret */
163 (*(unsigned long *)(pc - 15) == 0xffec8b55
164 && *(unsigned long *)(pc - 11) == 0x75ff1075
165 && *(unsigned long *)(pc - 7) == 0x0875ff0c
166 && *(unsigned long *)(pc - 3) == 0x831455ff
167 && *(unsigned long *)(pc + 1) == 0xc3c90cc4))
168 {
169 struct handler_args {
170 int signo;
171 siginfo_t *sip;
172 ucontext_t *ucontext;
173 } *handler_args = context->cfa;
174 mctx = &handler_args->ucontext->uc_mcontext;
175 }
176 else
177 return _URC_END_OF_STACK;
178
179 new_cfa = mctx->gregs[UESP];
180
181 fs->regs.cfa_how = CFA_REG_OFFSET;
182 fs->regs.cfa_reg = 4;
183 fs->regs.cfa_offset = new_cfa - (long) context->cfa;
184
185 /* The SVR4 register numbering macros aren't usable in libgcc. */
186 fs->regs.reg[0].how = REG_SAVED_OFFSET;
187 fs->regs.reg[0].loc.offset = (long)&mctx->gregs[EAX] - new_cfa;
188 fs->regs.reg[3].how = REG_SAVED_OFFSET;
189 fs->regs.reg[3].loc.offset = (long)&mctx->gregs[EBX] - new_cfa;
190 fs->regs.reg[1].how = REG_SAVED_OFFSET;
191 fs->regs.reg[1].loc.offset = (long)&mctx->gregs[ECX] - new_cfa;
192 fs->regs.reg[2].how = REG_SAVED_OFFSET;
193 fs->regs.reg[2].loc.offset = (long)&mctx->gregs[EDX] - new_cfa;
194 fs->regs.reg[6].how = REG_SAVED_OFFSET;
195 fs->regs.reg[6].loc.offset = (long)&mctx->gregs[ESI] - new_cfa;
196 fs->regs.reg[7].how = REG_SAVED_OFFSET;
197 fs->regs.reg[7].loc.offset = (long)&mctx->gregs[EDI] - new_cfa;
198 fs->regs.reg[5].how = REG_SAVED_OFFSET;
199 fs->regs.reg[5].loc.offset = (long)&mctx->gregs[EBP] - new_cfa;
200 fs->regs.reg[8].how = REG_SAVED_OFFSET;
201 fs->regs.reg[8].loc.offset = (long)&mctx->gregs[EIP] - new_cfa;
202 fs->retaddr_column = 8;
203 fs->signal_frame = 1;
204
205 return _URC_NO_REASON;
206 }
207
208 #endif