1 /* Translate Mach exception codes into signal numbers. i386 version.
2 Copyright (C) 1991-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
20 #include <hurd/signal.h>
21 #include <mach/exception.h>
23 /* Translate the Mach exception codes, as received in an `exception_raise' RPC,
24 into a signal number and signal subcode. */
27 _hurd_exception2signal (struct hurd_signal_detail
*detail
, int *signo
)
35 detail
->code
= detail
->exc
;
39 if (detail
->exc_code
== KERN_INVALID_ADDRESS
40 || detail
->exc_code
== KERN_PROTECTION_FAILURE
41 || detail
->exc_code
== KERN_WRITE_PROTECTION_FAILURE
)
45 detail
->code
= detail
->exc_subcode
;
46 detail
->error
= detail
->exc_code
;
49 case EXC_BAD_INSTRUCTION
:
51 if (detail
->exc_code
== EXC_I386_INVOP
)
52 detail
->code
= ILL_INVOPR_FAULT
;
53 else if (detail
->exc_code
== EXC_I386_STKFLT
)
54 detail
->code
= ILL_STACK_FAULT
;
60 switch (detail
->exc_code
)
62 case EXC_I386_DIV
: /* integer divide by zero */
64 detail
->code
= FPE_INTDIV_FAULT
;
67 case EXC_I386_INTO
: /* integer overflow */
69 detail
->code
= FPE_INTOVF_TRAP
;
72 /* These aren't anywhere documented or used in Mach 3.0. */
81 /* Subcode is the fp_status word saved by the hardware.
82 Give an error code corresponding to the first bit set. */
83 if (detail
->exc_subcode
& FPS_IE
)
86 detail
->code
= ILL_FPEOPR_FAULT
;
88 else if (detail
->exc_subcode
& FPS_DE
)
91 detail
->code
= FPE_FLTDNR_FAULT
;
93 else if (detail
->exc_subcode
& FPS_ZE
)
96 detail
->code
= FPE_FLTDIV_FAULT
;
98 else if (detail
->exc_subcode
& FPS_OE
)
101 detail
->code
= FPE_FLTOVF_FAULT
;
103 else if (detail
->exc_subcode
& FPS_UE
)
106 detail
->code
= FPE_FLTUND_FAULT
;
108 else if (detail
->exc_subcode
& FPS_PE
)
111 detail
->code
= FPE_FLTINX_FAULT
;
120 /* These two can only be arithmetic exceptions if we
121 are in V86 mode, which sounds like emulation to me.
122 (See Mach 3.0 i386/trap.c.) */
125 detail
->code
= FPE_EMERR_FAULT
;
129 detail
->code
= FPE_EMBND_FAULT
;
135 /* 3.0 doesn't give this one, why, I don't know. */
141 /* The only time we get this in Mach 3.0
142 is for an out of bounds trap. */
143 if (detail
->exc_code
== EXC_I386_BOUND
)
146 detail
->code
= FPE_SUBRNG_FAULT
;
157 if (detail
->exc_code
== EXC_I386_SGL
)
158 detail
->code
= DBG_SINGLE_TRAP
;
159 else if (detail
->exc_code
== EXC_I386_BPT
)
160 detail
->code
= DBG_BRKPNT_FAULT
;