January 2008 - Darwin-dev - lists.apple.com

Re: ECX_BAD_ACCESS again
by Robert Bielik 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Thunderbird 2.0.0.9 (Windows/20071031) Thanks Jonas, /R _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Jonas Maebe wrote: One warning about this: for i386 (Intel 32 bit), passing arguments is not going to work like that in C because the default calling convention there passes everything on the stack (while ours is fastcall, where the first three parameters are passed in registers). You may be able to declare your handler in gcc also as fastcall to work around this, but I don't know by heart how this is done. Or you may simply not pass any parameters at all. Ok, nice! As I know exactly where and when the exception might be thrown, I don't need to pass any params. As an aside, is there a way to register signal handlers scope-wise? That is, only to intercept a signal within a specific scope? Even though the library call is the only place where this happens, I guess that signal handling is global for the entire process? This email sent to site_archiver(a)lists.apple.com

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Re: ECX_BAD_ACCESS again
by Jonas Maebe 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 05 Jan 2008, at 12:00, Robert Bielik wrote: 1) PPC: http://svn.freepascal.org/svn/fpc/trunk/rtl/darwin/ppcgen/ppchnd.inc 2) Intel: http://svn.freepascal.org/svn/fpc/trunk/rtl/darwin/x86/x86hnd.inc Jonas _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Is there no way to do something similar in Mac OS X? I.e. just to handle the exception and to move on. You can catch the signal using a Unix signal handler. From there you can either longjmp (not advised for floating point exceptions because then the kernel does not restore the fpu exception mask on ppc; although by default all fpu exceptions are masked on darwin, so unlikely to affect you), or modify the signal context's program counter and return to where ever you want (e.g. a function which in turn raises a C++ exception). You can find the Pascal code I wrote for translating such signals into Pascal run time errors and exceptions (using the "modify the signal context" method) at I've kept the names of the data structures the same as in the original C headers, so it should be fairly straightforward to translate it to C ("grep -r uc_mcontext /usr/include" and go from there to see how those types are defined, but in your program you probably only have to include signal.h). The most important part for you is the stuff at the end of the handlers: there I setup the arguments for the function I'm returning to, and its address. One warning about this: for i386 (Intel 32 bit), passing arguments is not going to work like that in C because the default calling convention there passes everything on the stack (while ours is fastcall, where the first three parameters are passed in registers). You may be able to declare your handler in gcc also as fastcall to work around this, but I don't know by heart how this is done. Or you may simply not pass any parameters at all. This email sent to site_archiver(a)lists.apple.com

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ECX_BAD_ACCESS again
by Robert Bielik 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Thunderbird 2.0.0.9 (Windows/20071031) Hi all, TIA /R _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I've been searching the lists here with a fine-tooth comb, but have not found one adequate explanation on how to handle EXC_BAD_ACCESS exceptions. My problem: I'm developing a cross platform appl, where I'm using a third-party library which occasionally throws a EXC_BAD_ACCESS. I don't have the source code for the library, and I have NO choice but to use that particular library. In other words I have no choice but to handle the EXC_BAD_ACCESS. The problem occurs in Windows too (with the windows version of the library), but there I can use set_se_translator to translate the SE to a normal C++ exception. Is there no way to do something similar in Mac OS X? I.e. just to handle the exception and to move on. This email sent to site_archiver(a)lists.apple.com

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Re: DKIOCCDREADTOC returning BCD numbers?
by Chris Sarcone 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: DKIOCCDREADTOC returning BCD numbers?
by Stephen F. Booth 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: DKIOCCDREADTOC returning BCD numbers?
by David M. Cotter 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com do you get an error when you set formatAsTime to 1?? i have found this problem with many external (non-apple supplied) drives _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Thanks, but we have a workaround in the driver stack already if you use MSF=1 (probably the same you have - guess your best if it's BCD or not). I believe this is just a device issue which you'll have to take up with Plextor. This email sent to site_archiver(a)lists.apple.com

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Re: DKIOCCDREADTOC returning BCD numbers?
by Chris Sarcone 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: DKIOCCDREADTOC returning BCD numbers?
by David M. Cotter 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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fread/fwrite/fflush bug
by Norm Green 04 Jan '08

04 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Building kext for Leopard and Tiger
by Duane Murphy 04 Jan '08

04 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com --- At Fri, 4 Jan 2008 07:24:33 -0800, Duane Murphy wrote: >The interface that I am interested in overriding is the requestProbe My mistake. requestProbe is not a new API. It's just newly being called and supported by partitionScheme's. ...Duane _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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