diff options
Diffstat (limited to 'sysdeps/mach/hurd/i386/exc2signal.c')
| -rw-r--r-- | sysdeps/mach/hurd/i386/exc2signal.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/i386/exc2signal.c b/sysdeps/mach/hurd/i386/exc2signal.c new file mode 100644 index 0000000000..19f845a49e --- /dev/null +++ b/sysdeps/mach/hurd/i386/exc2signal.c @@ -0,0 +1,165 @@ +/* Translate Mach exception codes into signal numbers. i386 version. +Copyright (C) 1991, 1992, 1994 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#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 (int exception, int code, int subcode, + int *signo, long int *sigcode, int *error) +{ + *error = 0; + + switch (exception) + { + default: + *signo = SIGIOT; + *sigcode = exception; + break; + + case EXC_BAD_ACCESS: + if (code == KERN_PROTECTION_FAILURE) + *signo = SIGSEGV; + else + *signo = SIGBUS; + *sigcode = subcode; + *error = code; + break; + + case EXC_BAD_INSTRUCTION: + *signo = SIGILL; + if (code == EXC_I386_INVOP) + *sigcode = ILL_INVOPR_FAULT; + else if (code == EXC_I386_STKFLT) + *sigcode = ILL_STACK_FAULT; + else + *sigcode = 0; + break; + + case EXC_ARITHMETIC: + switch (code) + { + case EXC_I386_DIV: /* integer divide by zero */ + *signo = SIGFPE; + *sigcode = FPE_INTDIV_FAULT; + break; + + case EXC_I386_INTO: /* integer overflow */ + *signo = SIGFPE; + *sigcode = 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; + *sigcode = 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 (subcode & FPS_IE) + { + *signo = SIGILL; + *sigcode = ILL_FPEOPR_FAULT; + } + else if (subcode & FPS_DE) + { + *signo = SIGFPE; + *sigcode = FPE_FLTDNR_FAULT; + } + else if (subcode & FPS_ZE) + { + *signo = SIGFPE; + *sigcode = FPE_FLTDIV_FAULT; + } + else if (subcode & FPS_OE) + { + *signo = SIGFPE; + *sigcode = FPE_FLTOVF_FAULT; + } + else if (subcode & FPS_UE) + { + *signo = SIGFPE; + *sigcode = FPE_FLTUND_FAULT; + } + else if (subcode & FPS_PE) + { + *signo = SIGFPE; + *sigcode = FPE_FLTINX_FAULT; + } + else + { + *signo = SIGFPE; + *sigcode = 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; + *sigcode = FPE_EMERR_FAULT; + break; + case EXC_I386_BOUND: + *signo = SIGFPE; + *sigcode = FPE_EMBND_FAULT; + break; + } + break; + + case EXC_EMULATION: + /* 3.0 doesn't give this one, why, I don't know. */ + *signo = SIGEMT; + *sigcode = 0; + break; + + case EXC_SOFTWARE: + /* The only time we get this in Mach 3.0 + is for an out of bounds trap. */ + if (code == EXC_I386_BOUND) + { + *signo = SIGFPE; + *sigcode = FPE_SUBRNG_FAULT; + } + else + { + *signo = SIGEMT; + *sigcode = 0; + } + break; + + case EXC_BREAKPOINT: + *signo = SIGTRAP; + if (code == EXC_I386_SGL) + *sigcode = DBG_SINGLE_TRAP; + else if (code == EXC_I386_BPT) + *sigcode = DBG_BRKPNT_FAULT; + else + *sigcode = 0; + break; + } +} |