Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/m68k/linux-unwind.h @ 55:77e2b8dfacca gcc-4.4.5
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 |
| parents | a06113de4d67 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* DWARF2 EH unwinding support for Linux/m68k. |
| 2 Copyright (C) 2006, 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 Don't use this at all if inhibit_libc is used. */ | |
| 28 | |
| 29 #ifndef inhibit_libc | |
| 30 | |
| 31 #include <signal.h> | |
| 32 | |
| 33 /* <sys/ucontext.h> is unfortunately broken right now. */ | |
| 34 struct uw_ucontext { | |
| 35 unsigned long uc_flags; | |
| 36 struct ucontext *uc_link; | |
| 37 stack_t uc_stack; | |
| 38 mcontext_t uc_mcontext; | |
| 39 unsigned long uc_filler[80]; | |
| 40 __sigset_t uc_sigmask; | |
| 41 }; | |
| 42 | |
| 43 #define MD_FALLBACK_FRAME_STATE_FOR m68k_fallback_frame_state | |
| 44 | |
| 45 #ifdef __mcoldfire__ | |
| 46 #define M68K_FP_SIZE 8 | |
| 47 #else | |
| 48 #define M68K_FP_SIZE 12 | |
| 49 #endif | |
| 50 | |
| 51 static _Unwind_Reason_Code | |
| 52 m68k_fallback_frame_state (struct _Unwind_Context *context, | |
| 53 _Unwind_FrameState *fs) | |
| 54 { | |
| 55 unsigned short *pc = context->ra; | |
| 56 long cfa; | |
| 57 | |
| 58 /* moveq #__NR_sigreturn,%d0; trap #0 */ | |
| 59 if (pc[0] == 0x7077 && pc[1] == 0x4e40) | |
| 60 { | |
| 61 struct sigcontext *sc; | |
| 62 | |
| 63 /* Context is passed as the 3rd argument. */ | |
| 64 sc = *(struct sigcontext **) (context->cfa + 8); | |
| 65 | |
| 66 cfa = sc->sc_usp; | |
| 67 fs->regs.cfa_how = CFA_REG_OFFSET; | |
| 68 fs->regs.cfa_reg = 15; | |
| 69 fs->regs.cfa_offset = cfa - (long) context->cfa; | |
| 70 | |
| 71 fs->regs.reg[0].how = REG_SAVED_OFFSET; | |
| 72 fs->regs.reg[0].loc.offset = (long) &sc->sc_d0 - cfa; | |
| 73 fs->regs.reg[1].how = REG_SAVED_OFFSET; | |
| 74 fs->regs.reg[1].loc.offset = (long) &sc->sc_d1 - cfa; | |
| 75 fs->regs.reg[8].how = REG_SAVED_OFFSET; | |
| 76 fs->regs.reg[8].loc.offset = (long) &sc->sc_a0 - cfa; | |
| 77 fs->regs.reg[9].how = REG_SAVED_OFFSET; | |
| 78 fs->regs.reg[9].loc.offset = (long) &sc->sc_a1 - cfa; | |
| 79 | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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80 #ifdef __uClinux__ |
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77e2b8dfacca
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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81 fs->regs.reg[13].how = REG_SAVED_OFFSET; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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82 fs->regs.reg[13].loc.offset = (long) &sc->sc_a5 - cfa; |
|
77e2b8dfacca
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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83 #endif |
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77e2b8dfacca
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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84 |
| 0 | 85 fs->regs.reg[24].how = REG_SAVED_OFFSET; |
| 86 fs->regs.reg[24].loc.offset = (long) &sc->sc_pc - cfa; | |
| 87 | |
|
55
77e2b8dfacca
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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88 #ifndef __uClinux__ |
| 0 | 89 if (*(int *) sc->sc_fpstate) |
| 90 { | |
| 91 int *fpregs = (int *) sc->sc_fpregs; | |
| 92 | |
| 93 fs->regs.reg[16].how = REG_SAVED_OFFSET; | |
| 94 fs->regs.reg[16].loc.offset = (long) &fpregs[0] - cfa; | |
| 95 fs->regs.reg[17].how = REG_SAVED_OFFSET; | |
| 96 fs->regs.reg[17].loc.offset = (long) &fpregs[M68K_FP_SIZE/4] - cfa; | |
| 97 } | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
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98 #elif defined __mcffpu__ |
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77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
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99 # error Implement this when uClinux kernel is ported to an FPU architecture |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
100 #endif |
| 0 | 101 } |
| 102 #ifdef __mcoldfire__ | |
| 103 /* move.l #__NR_rt_sigreturn,%d0; trap #0 */ | |
| 104 else if (pc[0] == 0x203c && pc[1] == 0x0000 && | |
| 105 pc[2] == 0x00ad && pc[3] == 0x4e40) | |
| 106 #else | |
| 107 /* moveq #~__NR_rt_sigreturn,%d0; not.b %d0; trap #0 */ | |
| 108 else if (pc[0] == 0x7052 && pc[1] == 0x4600 && pc[2] == 0x4e40) | |
| 109 #endif | |
| 110 { | |
| 111 struct uw_ucontext *uc; | |
| 112 greg_t *gregs; | |
| 113 int i; | |
| 114 | |
| 115 /* Context is passed as the 3rd argument. */ | |
| 116 uc = *(struct uw_ucontext **) (context->cfa + 8); | |
| 117 | |
| 118 gregs = uc->uc_mcontext.gregs; | |
| 119 cfa = gregs[15]; | |
| 120 fs->regs.cfa_how = CFA_REG_OFFSET; | |
| 121 fs->regs.cfa_reg = 15; | |
| 122 fs->regs.cfa_offset = cfa - (long) context->cfa; | |
| 123 | |
| 124 /* register %d0-%d7/%a0-%a6 */ | |
| 125 for (i = 0; i <= 14; i++) | |
| 126 { | |
| 127 fs->regs.reg[i].how = REG_SAVED_OFFSET; | |
| 128 fs->regs.reg[i].loc.offset = (long) &gregs[i] - cfa; | |
| 129 } | |
| 130 | |
| 131 /* return address */ | |
| 132 fs->regs.reg[24].how = REG_SAVED_OFFSET; | |
| 133 fs->regs.reg[24].loc.offset = (long) &gregs[16] - cfa; | |
| 134 | |
| 135 #define uc_fpstate uc_filler[0] | |
| 136 | |
| 137 if (uc->uc_fpstate) | |
| 138 { | |
| 139 long fpregs = (long) uc->uc_mcontext.fpregs.f_fpregs; | |
| 140 | |
| 141 /* register %fp0-%fp7 */ | |
| 142 for (i = 16; i <= 23; i++) | |
| 143 { | |
| 144 fs->regs.reg[i].how = REG_SAVED_OFFSET; | |
| 145 fs->regs.reg[i].loc.offset = fpregs - cfa; | |
| 146 fpregs += M68K_FP_SIZE; | |
| 147 } | |
| 148 } | |
| 149 } | |
| 150 else | |
| 151 return _URC_END_OF_STACK; | |
| 152 | |
| 153 fs->retaddr_column = 24; | |
| 154 fs->signal_frame = 1; | |
| 155 | |
| 156 return _URC_NO_REASON; | |
| 157 } | |
| 158 #endif /* ifdef inhibit_libc */ |