| /* Translate Mach exception codes into signal numbers. i386 version. |
| Copyright (C) 1991-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <hurd.h> |
| #include <hurd/signal.h> |
| #include <mach/exception.h> |
| |
| /* Translate the Mach exception codes, as received in an `exception_raise' RPC, |
| into a signal number and signal subcode. */ |
| |
| void |
| _hurd_exception2signal (struct hurd_signal_detail *detail, int *signo) |
| { |
| detail->error = 0; |
| |
| switch (detail->exc) |
| { |
| default: |
| *signo = SIGIOT; |
| detail->code = detail->exc; |
| break; |
| |
| case EXC_BAD_ACCESS: |
| if (detail->exc_code == KERN_INVALID_ADDRESS |
| || detail->exc_code == KERN_PROTECTION_FAILURE |
| || detail->exc_code == KERN_WRITE_PROTECTION_FAILURE) |
| *signo = SIGSEGV; |
| else |
| *signo = SIGBUS; |
| detail->code = detail->exc_subcode; |
| detail->error = detail->exc_code; |
| break; |
| |
| case EXC_BAD_INSTRUCTION: |
| *signo = SIGILL; |
| if (detail->exc_code == EXC_I386_INVOP) |
| detail->code = ILL_INVOPR_FAULT; |
| else if (detail->exc_code == EXC_I386_STKFLT) |
| detail->code = ILL_STACK_FAULT; |
| else |
| detail->code = 0; |
| break; |
| |
| case EXC_ARITHMETIC: |
| switch (detail->exc_code) |
| { |
| case EXC_I386_DIV: /* integer divide by zero */ |
| *signo = SIGFPE; |
| detail->code = FPE_INTDIV_FAULT; |
| break; |
| |
| case EXC_I386_INTO: /* integer overflow */ |
| *signo = SIGFPE; |
| detail->code = FPE_INTOVF_TRAP; |
| break; |
| |
| /* These aren't anywhere documented or used in Mach 3.0. */ |
| case EXC_I386_NOEXT: |
| case EXC_I386_EXTOVR: |
| default: |
| *signo = SIGFPE; |
| detail->code = 0; |
| break; |
| |
| case EXC_I386_EXTERR: |
| /* Subcode is the fp_status word saved by the hardware. |
| Give an error code corresponding to the first bit set. */ |
| if (detail->exc_subcode & FPS_IE) |
| { |
| *signo = SIGILL; |
| detail->code = ILL_FPEOPR_FAULT; |
| } |
| else if (detail->exc_subcode & FPS_DE) |
| { |
| *signo = SIGFPE; |
| detail->code = FPE_FLTDNR_FAULT; |
| } |
| else if (detail->exc_subcode & FPS_ZE) |
| { |
| *signo = SIGFPE; |
| detail->code = FPE_FLTDIV_FAULT; |
| } |
| else if (detail->exc_subcode & FPS_OE) |
| { |
| *signo = SIGFPE; |
| detail->code = FPE_FLTOVF_FAULT; |
| } |
| else if (detail->exc_subcode & FPS_UE) |
| { |
| *signo = SIGFPE; |
| detail->code = FPE_FLTUND_FAULT; |
| } |
| else if (detail->exc_subcode & FPS_PE) |
| { |
| *signo = SIGFPE; |
| detail->code = FPE_FLTINX_FAULT; |
| } |
| else |
| { |
| *signo = SIGFPE; |
| detail->code = 0; |
| } |
| break; |
| |
| /* These two can only be arithmetic exceptions if we |
| are in V86 mode, which sounds like emulation to me. |
| (See Mach 3.0 i386/trap.c.) */ |
| case EXC_I386_EMERR: |
| *signo = SIGFPE; |
| detail->code = FPE_EMERR_FAULT; |
| break; |
| case EXC_I386_BOUND: |
| *signo = SIGFPE; |
| detail->code = FPE_EMBND_FAULT; |
| break; |
| } |
| break; |
| |
| case EXC_EMULATION: |
| /* 3.0 doesn't give this one, why, I don't know. */ |
| *signo = SIGEMT; |
| detail->code = 0; |
| break; |
| |
| case EXC_SOFTWARE: |
| /* The only time we get this in Mach 3.0 |
| is for an out of bounds trap. */ |
| if (detail->exc_code == EXC_I386_BOUND) |
| { |
| *signo = SIGFPE; |
| detail->code = FPE_SUBRNG_FAULT; |
| } |
| else |
| { |
| *signo = SIGEMT; |
| detail->code = 0; |
| } |
| break; |
| |
| case EXC_BREAKPOINT: |
| *signo = SIGTRAP; |
| if (detail->exc_code == EXC_I386_SGL) |
| detail->code = DBG_SINGLE_TRAP; |
| else if (detail->exc_code == EXC_I386_BPT) |
| detail->code = DBG_BRKPNT_FAULT; |
| else |
| detail->code = 0; |
| break; |
| } |
| } |