Texas Instruments Corporation

Madan Srinivas

Veeramanikandan Raju

Keshava Munegowda

Amritpal Singh Mundra

Rohit Joshi

Sachin Billore

Kavitha Malarvizhi

An embedded device is provided that is configured to randomize execution time of a boot process of the embedded device performed responsive to a reset signal, wherein reset release time is nondeterministic. The embedded device may include a randomizer component configured to generate a timeout signal after a random interval, wherein to randomize execution time, the embedded device is further configured to execute a first portion of a reset process, signal the randomizer component to generate the timeout signal after a first random interval, wait for the timeout signal, and execute a second portion of the reset process responsive to the timeout signal.

Randomized execution countermeasures against fault injection attacks during boot of an embedded device

Disclosed embodiments relate to storing and accessing files. In an embodiment, a method includes writing a file to a writing a file to a storage device having a file system having a file allocation table (FAT). Writing the file includes allocating a plurality of clusters of the file system to the file, wherein at least a portion of the allocated clusters is contiguous. The FAT includes a plurality of cluster addresses corresponding to the allocated clusters. A signature value is stored in a cluster address corresponding to a first cluster of the contiguous clusters to indicate the presence of the contiguous clusters. In each of a set of consecutive cluster addresses succeeding the cluster address corresponding to the first cluster, a value that partially represents the number of the contiguous clusters is stored. The number of contiguous clusters is determinable by combining the values stored in the consecutive cluster addresses.

Method and system for file storage and access

Several systems and methods for accessing files stored in a storage device are disclosed. In an embodiment, the method includes accessing a file allocation table (FAT) in a computer file system associated with the storage device. The FAT includes a plurality of cluster addresses corresponding to a plurality of clusters allocated to a file stored in the storage device. A cluster address is read to identify a location of a next cluster. One or more bits in the cluster address are read to determine a presence of a signature value indicating allocation of a set of contiguous clusters from among the plurality of clusters. A number of contiguous clusters is computed based on a pre-determined number of consecutive cluster addresses succeeding the cluster address if the signature value is present. The set of contiguous clusters are read from the storage device based on the computed number of contiguous clusters.

File access method and system thereof

A computer device () with a file system having clusters and meta data. The computer device () includes a processor () and a storage () coupled to the processor and having physical representations of instructions so that the processor is operable to reserve () at least one of the clusters and to create a log record when meta data for the file system is to be updated by a write () of such meta data beforehand to such a reserved cluster, and then set () at least one state entry to substantially represent readiness to write the meta data to the file system.

IC updating file system meta data with log record data

A computer device () has a file system having clusters and meta data. The computer device () includes a processor () and a storage () coupled to the processor and having physical representations of instructions so that the processor is operable to reserve () at least one of the clusters and to create a log record when meta data for the file system is to be updated by a write () of such meta data beforehand to such a reserved cluster, and then set () at least one state entry to substantially represent readiness to write the meta data to the file system.

Growing community of inventors

Trivandrum, India

Madan Srinivas