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| author | cracauer <cracauer@FreeBSD.org> | 1999-07-25 13:16:09 +0000 |
|---|---|---|
| committer | cracauer <cracauer@FreeBSD.org> | 1999-07-25 13:16:09 +0000 |
| commit | 36a7b829a04919c4ca14a6e4fe1bf3797c135a82 (patch) | |
| tree | 8748ed38e03651976646062add8e82dac5601f42 /sys/kern/subr_trap.c | |
| parent | 1c17b991d77a8dc353f1efc23d293b80176cb18b (diff) | |
| download | FreeBSD-src-36a7b829a04919c4ca14a6e4fe1bf3797c135a82.zip FreeBSD-src-36a7b829a04919c4ca14a6e4fe1bf3797c135a82.tar.gz | |
On FPU exceptions, pass a useful error code (one of the FPE_...
macros) to the signal handler, for old-style BSD signal handlers as
the second (int) argument, for SA_SIGINFO signal handlers as
siginfo_t->si_code. This is source-compatible with Solaris, except
that we have no <siginfo.h> (which isn't even mentioned in POSIX
1003.1b).
An rather complete example program is at
http://www3.cons.org/cracauer/freebsd-signal.c
This will be added to the regression tests in src/.
This commit also adds code to disable the (hardware) FPU from
userconfig, so that you can use a software FP emulator on a machine
that has hardware floating point. See LINT.
Diffstat (limited to 'sys/kern/subr_trap.c')
| -rw-r--r-- | sys/kern/subr_trap.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c index 1d9d216..e717563 100644 --- a/sys/kern/subr_trap.c +++ b/sys/kern/subr_trap.c @@ -35,7 +35,7 @@ * SUCH DAMAGE. * * from: @(#)trap.c 7.4 (Berkeley) 5/13/91 - * $Id: trap.c,v 1.138 1999/06/01 18:19:47 jlemon Exp $ + * $Id: trap.c,v 1.139 1999/06/18 14:32:16 bde Exp $ */ /* @@ -360,7 +360,7 @@ restart: break; case T_DIVIDE: /* integer divide fault */ - ucode = FPE_INTDIV_TRAP; + ucode = FPE_INTDIV; i = SIGFPE; break; @@ -382,12 +382,12 @@ restart: #endif /* NISA > 0 */ case T_OFLOW: /* integer overflow fault */ - ucode = FPE_INTOVF_TRAP; + ucode = FPE_INTOVF; i = SIGFPE; break; case T_BOUND: /* bounds check fault */ - ucode = FPE_SUBRNG_TRAP; + ucode = FPE_FLTSUB; i = SIGFPE; break; |
