Hi, (All on 10.2-BETA1.)
I noticed that the latest patch in the bug https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187594 <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187594> works on amd64 but fails to load zfs.ko on i386 with a symbol not found error. Looking at the patch, there is one file that has “extern int zio_use_uma” to reference a variable that is declared elsewhere as “static int zio_use_uma”. To me this obviously should not work. However it does work on amd64 but fails on i386. Below is a small test case that reproduces the problem. The generated kernel module loads on amd64 but fails on i386. On amd64 one compilation unit is accessing a static in from another compilation unit by declaring the variable “extern”. I haven’t looked further to attempt to find the bug. However, it looks like a Bad Thing™ to me. Regards, Jan. ——Makefile: KMOD= refstatic SRCS= refstatic.c testfunc.c bus_if.h device_if.h pci_if.h .include <bsd.kmod.mk> —— refstatic.c: #include <sys/param.h> #include <sys/kernel.h> #include <sys/bus.h> #include <sys/module.h> #include <sys/systm.h> #include <sys/types.h> #include <sys/malloc.h> #include <sys/kthread.h> #include <sys/conf.h> #include <sys/uio.h> #include <sys/bus.h> #include <sys/rman.h> #include <sys/queue.h> #include <dev/pci/pcireg.h> #include <dev/pci/pcivar.h> #include <machine/bus.h> #include <machine/resource.h> static int testvar = 1; int func(void); static int refstatic_probe(device_t dev) { ++testvar; device_printf(dev, "func returns %d\n", func()); return ENXIO; } static int refstatic_attach(device_t dev) { (void) dev; return ENXIO; } static int refstatic_detach(device_t dev) { return 0; } static device_method_t refstatic_methods[] = { DEVMETHOD(device_probe, refstatic_probe), DEVMETHOD(device_attach, refstatic_attach), DEVMETHOD(device_detach, refstatic_detach), { 0, 0 } }; static driver_t refstatic_driver = { "refstatic", refstatic_methods, 64 }; static devclass_t refstatic_devclass; DRIVER_MODULE(refstatic, pci, refstatic_driver, refstatic_devclass, 0, 0); ——testfunc.c: extern int testvar; int func(void); int func(void) { return testvar; } _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
