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1 | /* Translate Mach exception codes into signal numbers. MIPS version. | |
2 | Copyright (C) 1996, 1997 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | #include <hurd.h> | |
21 | #include <hurd/signal.h> | |
22 | #include <mach/exception.h> | |
23 | ||
24 | /* Translate the Mach exception codes, as received in an `exception_raise' RPC, | |
25 | into a signal number and signal subcode. */ | |
26 | ||
27 | void | |
28 | _hurd_exception2signal (struct hurd_signal_detail *detail, int *signo) | |
29 | { | |
30 | detail->error = 0; | |
31 | ||
32 | switch (detail->exc) | |
33 | { | |
34 | default: | |
35 | *signo = SIGIOT; | |
36 | detail->code = detail->exc; | |
37 | break; | |
38 | ||
39 | case EXC_BAD_ACCESS: | |
40 | if (detail->exc_code == KERN_PROTECTION_FAILURE) | |
41 | *signo = SIGSEGV; | |
42 | else | |
43 | *signo = SIGBUS; | |
44 | detail->code = detail->exc_subcode; | |
45 | detail->error = detail->exc_code; | |
46 | break; | |
47 | ||
48 | case EXC_BAD_INSTRUCTION: | |
49 | *signo = SIGILL; | |
50 | if (detail->exc_code == EXC_MIPS_II) | |
51 | detail->code = detail->exc_subcode; | |
52 | else | |
53 | detail->code = 0; | |
54 | break; | |
55 | ||
56 | case EXC_ARITHMETIC: | |
57 | switch (detail->exc_code) | |
58 | { | |
59 | case EXC_MIPS_OV: /* integer overflow */ | |
60 | *signo = SIGFPE; | |
61 | detail->code = detail->exc_subcode; | |
62 | break; | |
63 | ||
64 | default: | |
65 | *signo = SIGFPE; | |
66 | detail->code = 0; | |
67 | break; | |
68 | ||
69 | case EXC_MIPS_INT: | |
70 | /* Subcode is the fp_status word saved by the hardware. | |
71 | Give an error code corresponding to the first bit set. */ | |
72 | if (detail->exc_subcode == EXC_MIPS_FLT_UNIMP) | |
73 | *signo = SIGILL; | |
74 | else | |
75 | *signo = SIGFPE; | |
76 | detail->code = detail->exc_subcode; | |
77 | break; | |
78 | } | |
79 | break; | |
80 | ||
81 | case EXC_EMULATION: | |
82 | /* 3.0 doesn't give this one, why, I don't know. */ | |
83 | *signo = SIGEMT; | |
84 | detail->code = 0; | |
85 | break; | |
86 | ||
87 | case EXC_SOFTWARE: | |
88 | *signo = SIGEMT; | |
89 | detail->code = 0; | |
90 | break; | |
91 | ||
92 | case EXC_BREAKPOINT: | |
93 | *signo = SIGTRAP; | |
94 | detail->code = 0; | |
95 | break; | |
96 | } | |
97 | } |