Interrupt system fixed up and installed.
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7e66a68afa
commit
ea9745ee2f
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@ -107,6 +107,7 @@ SCSHOBJS = \
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scsh/flock.o scsh/flock1.o \
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scsh/flock.o scsh/flock1.o \
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scsh/machine/stdio_dep.o \
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scsh/machine/stdio_dep.o \
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scsh/machine/time_dep1.o \
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scsh/machine/time_dep1.o \
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scsh/machine/signals1.o \
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scsh/machine/libansi.o \
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scsh/machine/libansi.o \
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scsh/network.o scsh/network1.o \
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scsh/network.o scsh/network1.o \
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scsh/putenv.o \
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scsh/putenv.o \
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@ -635,11 +636,13 @@ scsh/scsh.image: $(VM) $(SCHEME) $(CIG).image
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echo ",load $(srcdir)/scsh/scsh-interfaces.scm"; \
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echo ",load $(srcdir)/scsh/scsh-interfaces.scm"; \
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echo ",load $(srcdir)/scsh/machine/packages.scm"; \
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echo ",load $(srcdir)/scsh/machine/packages.scm"; \
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echo ",load $(srcdir)/scsh/scsh-package.scm"; \
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echo ",load $(srcdir)/scsh/scsh-package.scm"; \
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echo ",user"; \
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echo ",load-package scsh"; \
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echo ",load-package scsh"; \
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echo ",load-package scsh-here-string-hax"; \
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echo ",load-package scsh-here-string-hax"; \
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echo ",open scsh"; \
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echo ",translate =scheme48/ $(LIB)/"; \
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echo ",translate =scheme48/ $(LIB)/"; \
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echo ",in scsh-level-0"; \
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echo "(%install-scsh-handlers)"; \
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echo ",user"; \
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echo ",open scsh"; \
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echo "(dump-scsh \"scsh/scsh.image\")") \
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echo "(dump-scsh \"scsh/scsh.image\")") \
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| ./$(VM) -o ./$(VM) -i $(CIG).image
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| ./$(VM) -o ./$(VM) -i $(CIG).image
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@ -28,3 +28,6 @@
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(usr1 30) ; user defined signal 1
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(usr1 30) ; user defined signal 1
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(usr2 31) ; user defined signal 2
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(usr2 31) ; user defined signal 2
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)
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)
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(define signals-ignored-by-default
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(list signal/chld signal/cont)) ; These are Posix.
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@ -707,7 +707,8 @@
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(define (init-scsh-hindbrain relink-ff?)
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(define (init-scsh-hindbrain relink-ff?)
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(if relink-ff? (lookup-all-externals)) ; Re-link C calls.
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(if relink-ff? (lookup-all-externals)) ; Re-link C calls.
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(init-fdports!))
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(init-fdports!)
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(%install-unix-scsh-handlers))
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;;; Some globals:
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;;; Some globals:
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@ -59,6 +59,31 @@
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(define with-enabled-interrupts* with-interrupts)
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(define with-enabled-interrupts* with-interrupts)
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(define interrupt/alarm (enum interrupt alarm))
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(define interrupt/keyboard (enum interrupt keyboard))
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(define interrupt/memory-shortage (enum interrupt memory-shortage))
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(define interrupt/chld (enum interrupt chld))
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(define interrupt/cont (enum interrupt cont))
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(define interrupt/hup (enum interrupt hup))
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(define interrupt/quit (enum interrupt quit))
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(define interrupt/term (enum interrupt term))
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(define interrupt/tstp (enum interrupt tstp))
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(define interrupt/usr1 (enum interrupt usr1))
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(define interrupt/usr2 (enum interrupt usr2))
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(define interrupt/info (enum interrupt info))
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(define interrupt/io (enum interrupt io))
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(define interrupt/poll (enum interrupt poll))
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(define interrupt/prof (enum interrupt prof))
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(define interrupt/pwr (enum interrupt pwr))
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(define interrupt/urg (enum interrupt urg))
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(define interrupt/vtalrm (enum interrupt vtalrm))
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(define interrupt/winch (enum interrupt winch))
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(define interrupt/xcpu (enum interrupt xcpu))
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(define interrupt/xfsz (enum interrupt xfsz))
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(define interrupt/int interrupt/keyboard)
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(define interrupt/alrm interrupt/alarm)
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;;; Get/Set signal handlers
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;;; Get/Set signal handlers
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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@ -76,44 +101,42 @@
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(define-foreign %do-default-sigaction (do_default_sigaction (fixnum signal))
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(define-foreign %do-default-sigaction (do_default_sigaction (fixnum signal))
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ignore)
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ignore)
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;;; This gives the default handler for each signal.
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(define default-int-handler-vec
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(define default-handler-vec
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;; Non-Unix-signal interrupts just get their default values from
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(initialize-vector 32 (lambda (sig)
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;; the current value of I-H.
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;; This is the guy to call when you want signal
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(let ((v (copy-vector interrupt-handlers)))
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;; SIG handled in the default manner.
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(do ((sig 31 (- sig 1))) ; For each Unix signal
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(if (memv sig signals-ignored-by-default)
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((< sig 0)) ; make & install a default
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(lambda (enabled-interrupts) #f)
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(let ((i (%signal->interrupt sig))) ; signal handler.
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(lambda (enabled-interrupts)
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(if (>= i 0) ; Don't mess with non-signal interrupts.
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(%do-default-sigaction sig))))))
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(vector-set! v i (if (memv sig signals-ignored-by-default)
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(lambda (enabled-interrupts) #f)
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(lambda (enabled-interrupts)
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(%do-default-sigaction sig)))))))
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v))
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;;; HANDLER is #f (ignore), #t (default), or a procedure taking an integer
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;;; HANDLER is #f (ignore), #t (default), or a procedure taking an integer
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;;; argument. The interrupt is delivered to a procedure by (1) setting the
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;;; argument. The interrupt is delivered to a procedure by (1) setting the
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;;; ENABLED-INTERRUPTS register to 0 (i.e., blocking all interrupts), and (2)
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;;; ENABLED-INTERRUPTS register to 0 (i.e., blocking all interrupts), and (2)
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;;; applying the procedure to the previous value of the ENABLED-INTERRUPTS
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;;; applying the procedure to the previous value of the ENABLED-INTERRUPTS
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;;; register. If the procedure returns normally (i.e., it doesn't throw to a
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;;; register. If the procedure returns normally, the ENABLED-INTERRUPTS
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;;; continuation), the ENABLED-INTERRUPTS register will be restored to its
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;;; register will be restored to its previous value.
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;;; previous value.
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;;; This handler does nothing -- used when the handler is #f.
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;;; This handler does nothing -- used when the handler is #f.
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(define (noop-sig-handler enabled-interrupts) #f)
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(define (noop-sig-handler enabled-interrupts) #f)
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(define (set-signal-handler! sig handler)
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(define (set-interrupt-handler! int handler)
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(let ((nhandler (case handler
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(let ((ohandler (interrupt-handler int)))
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((#t) (vector-ref default-handler-vec sig))
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(vector-set! interrupt-handlers int
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((#f) noop-sig-handler)
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(case handler
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(else handler)))
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((#t) (vector-ref default-int-handler-vec int))
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(int (signal->interrupt sig)))
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((#f) noop-sig-handler)
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(with-enabled-interrupts 0
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(else handler)))
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(let ((ohandler (vector-ref interrupt-handlers int)))
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ohandler))
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(vector-set! interrupt-handlers int nhandler)
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(cond ((eq? ohandler (vector-ref default-handler-vec sig)) #t)
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((eq? ohandler noop-sig-handler) #f)
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(else ohandler))))))
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(define (signal-handler sig)
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(define (interrupt-handler int)
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(let ((handler (vector-ref interrupt-handlers (signal->interrupt sig))))
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(let ((handler (vector-ref interrupt-handlers int)))
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(cond ((eq? handler (vector-ref default-handler-vec sig)) #t)
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(cond ((eq? handler (vector-ref default-int-handler-vec int)) #t)
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((eq? handler noop-sig-handler) #f)
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((eq? handler noop-sig-handler) #f)
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(else handler))))
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(else handler))))
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@ -166,6 +189,8 @@
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(do ((sig 32 (- sig 1)))
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(do ((sig 32 (- sig 1)))
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((< sig 0))
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((< sig 0))
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(let ((i (%signal->interrupt sig)))
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(let ((i (%signal->interrupt sig)))
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(if (not (or (= i -1) (= sig signal/int) (= sig signal/alrm)))
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(if (not (or (= i -1)
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(= sig signal/int) ; Leave ^c and
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(= sig signal/alrm))) ; alarm handlers alone.
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(vector-set! interrupt-handlers i
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(vector-set! interrupt-handlers i
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(vector-ref default-handler-vec sig))))))
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(vector-ref default-int-handler-vec i))))))
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@ -12,6 +12,9 @@
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/* Make sure our exports match up w/the implementation: */
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/* Make sure our exports match up w/the implementation: */
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#include "sighandlers1.h"
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#include "sighandlers1.h"
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/* Import the OS-dependent set of signals and their translations
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** to S48 vm interrupts.
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*/
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#include "signals1.h"
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#include "signals1.h"
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extern int errno;
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extern int errno;
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@ -63,7 +66,7 @@ int get_procmask(int *old_lo_p)
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static void scm_handle_sig(int sig)
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static void scm_handle_sig(int sig)
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{
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{
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/* fprintf(stderr, "scm_handle_sig(%d)\n", sig); */
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/*fprintf(stderr, "scm_handle_sig(%d) = int %d\n", sig, sig2int[sig]);*/
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Spending_interruptsS |= (1<<sig2int[sig]);
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Spending_interruptsS |= (1<<sig2int[sig]);
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}
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}
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@ -169,6 +172,7 @@ void install_scsh_handlers(void)
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sigemptyset(&new.sa_mask); /* WTF */
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sigemptyset(&new.sa_mask); /* WTF */
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new.sa_handler = scm_handle_sig;
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new.sa_handler = scm_handle_sig;
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new.sa_flags = 0;
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for(i=max_sig; i>=0; i--)
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for(i=max_sig; i>=0; i--)
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if( sig2int[i] ) {
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if( sig2int[i] ) {
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@ -1,4 +1,4 @@
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/* Exports from signals1.c */
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/* Exports from signals1.c */
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const int sig2int[];
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extern const int sig2int[];
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const int max_sig;
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extern const int max_sig;
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