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  • Read DVDs with bogus permissions in Ubuntu

    Jan 3, 2015 • Roger Ferrer Ibáñez • linux • debian, fixes, opensource, packages, ubuntu

    What if your DVD recorder sets bogus permissions to your DVDs?

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  • ARM assembler in Raspberry Pi – Chapter 23

    Jan 2, 2015 • Roger Ferrer Ibáñez • Raspberry Pi

    Today we will see what happens when we nest a function inside another. It seems a harmless thing to do but it happens to come with its own dose of interesting details.

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  • ARM assembler in Raspberry Pi – Chapter 22

    Dec 20, 2014 • Roger Ferrer Ibáñez • Raspberry Pi • arm, assembler

    Several times in previous chapters we have talked about ARM as an architecture that has several features aimed at embedding systems. In embedded systems memory is scarce and expensive, so designs that help reduce the memory footprint are very welcome. Today we will see another of these features: the Thumb instruction set.

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  • ARM assembler in Raspberry Pi – Chapter 21

    Aug 23, 2014 • Roger Ferrer Ibáñez • Raspberry Pi

    We already know that ARM is a 32-bit architecture: general purpose registers are 32-bit wide and addresses in memory are 32-bit numbers. The natural integer size for an architecture is usually called a word and in ARM is obviously 32-bit integers. Sometimes, though, we need to deal with subword data: integers of size smaller than 32 bits.

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  • ARM assembler in Raspberry Pi – Chapter 20

    Aug 20, 2014 • Roger Ferrer Ibáñez • Raspberry Pi

    Today we will see how to make indirect calls.

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