John Baldwin wrote: >On Sunday 12 December 2004 01:00 am, Julian Elischer wrote: > > >>We need to decide what to do with this PR >> >> > >I just don't like loosing the bell but I guess it can go in. It also needs to >be merged into boot0ext.S, but that wouldn't have to lose the bell as that >version has more room for code. > > Peter Edwards has made a reply to kern/66248 that saves enough bytes to allow us to keep the bell. could you look at that? thanks. > > >>-------- Original Message -------- >>Subject: Re: kern/66248: [panic] bootloader is confused by booting from USB >>flash, trashes main drives boot block >>Date: Mon, 8 Nov 2004 17:20:21 GMT >>From: Hans Petter Selasky <hselasky_at_c2i.net> >>Reply-To: Hans Petter Selasky <hselasky_at_c2i.net> >>To: freebsd-usb_at_freebsd.org >> >>The following reply was made to PR kern/66248; it has been noted by GNATS. >> >>From: Hans Petter Selasky <hselasky_at_c2i.net> >>To: jhb_at_freebsd.org, freebsd-gnats-submit_at_freebsd.org, bremner_at_unb.ca >>Cc: >>Subject: Re: kern/66248: [panic] bootloader is confused by booting from USB >>flash, trashes main drives boot block >>Date: Mon, 8 Nov 2004 18:24:03 +0100 >> >> --SUOF0GtieIMvvwua >> Content-Type: text/plain; charset=us-ascii >> Content-Disposition: inline >> >> Hi, >> >> Attached patch for /src/sys/boot/i386/boot0/boot0.S closes kern/66248 >> Apply using: cat boot0.S.diff | patch -N -l >> >> >> When the boot0 boot-manager is used on a floppy or USB drive, the >>floppy's or USB's boot-sector gets written to the hdd! >> >> Solution: Only update the boot-sector when there is a valid drive number >>or the drive number is set manually. >> >> To make the patch fit into the code I had to disable the "beep-signal". >> >> Yours >> -HPS >> >> >> --SUOF0GtieIMvvwua >> Content-Type: text/plain; charset=us-ascii >> Content-Disposition: attachment; filename="boot0.S.diff" >> >> *** boot0.S.ref Wed Oct 20 17:24:19 2004 >> --- boot0.S Wed Oct 20 17:30:56 2004 >> *************** >> *** 103,112 **** >> * Check what flags were loaded with us, specifically, Use a predefined >>Drive. * If what the bios gives us is bad, use the '0' in the block >>instead, as well. */ >> ! testb $0x20,_FLAGS(%bp) # Set number drive? >> jnz main.1 # Yes >> testb %dl,%dl # Drive number valid? >> js main.2 # Possibly (0x80 set) >> main.1: movb _SETDRV(%bp),%dl # Drive number to use >> /* >> * Whatever we decided to use, now store it into the fake >> --- 103,117 ---- >> * Check what flags were loaded with us, specifically, Use a predefined >>Drive. * If what the bios gives us is bad, use the '0' in the block >>instead, as well. */ >> ! testb $0x20,_FLAGS(%bp) # Set drive number? >> jnz main.1 # Yes >> testb %dl,%dl # Drive number valid? >> js main.2 # Possibly (0x80 set) >> + /* >> + * Only update the boot-sector when there is a valid drive number or >> + * the drive number is set manually. >> + */ >> + orb $0x40,_FLAGS(%bp) # Disable updates >> main.1: movb _SETDRV(%bp),%dl # Drive number to use >> /* >> * Whatever we decided to use, now store it into the fake >> *************** >> *** 203,210 **** >> /* >> * Start of input loop. Beep and take note of time >> */ >> ! main.10: movb $ASCII_BEL,%al # Signal >> callw putchr # beep! >> xorb %ah,%ah # BIOS: Get >> int $0x1a # system time >> movw %dx,%di # Ticks when >> --- 208,218 ---- >> /* >> * Start of input loop. Beep and take note of time >> */ >> ! main.10: >> ! #ifdef BEL >> ! movb $ASCII_BEL,%al # Signal >> callw putchr # beep! >> + #endif >> xorb %ah,%ah # BIOS: Get >> int $0x1a # system time >> movw %dx,%di # Ticks when >> >> --SUOF0GtieIMvvwua-- >>_______________________________________________ >>freebsd-usb_at_freebsd.org mailing list >>http://lists.freebsd.org/mailman/listinfo/freebsd-usb >>To unsubscribe, send any mail to "freebsd-usb-unsubscribe_at_freebsd.org" >>_______________________________________________ >>freebsd-current_at_freebsd.org mailing list >>http://lists.freebsd.org/mailman/listinfo/freebsd-current >>To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" >> >> > > >Received on Thu Jan 06 2005 - 20:32:22 UTC
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