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authorPaul Elder <paul.elder@ideasonboard.com>2020-06-08 19:36:12 +0900
committerPaul Elder <paul.elder@ideasonboard.com>2020-06-19 20:21:00 +0900
commit1023107b6405266d480ce9c08cd82a30449a505b (patch)
treea09a761ac510ef61b9b17ae912466e5e1519456a /src/qcam/assets/feathericons/battery.svg
parentee5dc92dc19965f12b950aa52ad231e192086711 (diff)
v4l2: v4l2_compat: Intercept open64, openat64, and mmap64
Some applications (eg. Firefox, Google Chrome, Skype) use open64, openat64, and mmap64 instead of their non-64 versions that we currently intercept. Intercept these calls as well. _LARGEFILE64_SOURCE needs to be set so that the 64-bit symbols are available and not synonymous to the non-64-bit versions on 64-bit systems. Also, since we set _FILE_OFFSET_BITS to 32 to force the various open and mmap symbols that we export to not be the 64-bit versions, our dlsym to get the original open and mmap calls will not automatically be converted to their 64-bit versions. Since we intercept both 32-bit and 64-bit versions of open and mmap, we should be using the 64-bit version to service both. Fetch the 64-bit versions of openat and mmap directly. musl defines the 64-bit symbols as macros that are equivalent to the non-64-bit symbols, so we put compile guards that check if the 64-bit symbols are defined. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # Compile with musl Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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