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This patch renames build_id_find_nhdr() to
build_id_find_nhdr_for_addr(), and changes it to never examine the
library name.
Tested on Fedora by confirming that build_id_get_data() returns the same
build-id as the file(1) tool. For BSD, I confirmed that the API used
(dladdr() and struct Dl_info) is documented in FreeBSD's manpages.
This solves two problems:
- We can now the query the build-id without knowing the installed library's
filename.
This matters because Android requires specific filenames for HAL
modules, such as "/vendor/lib/hw/vulkan.${board}.so". The HAL
filenames do not follow the Unix convention of "libfoo.so". In
other words, the same query code will now work on Linux and Android.
- Querying the build-id now works correctly when the process
contains multiple shared objects with the same basename.
(Admittedly, this is a highly unlikely scenario).
Cc: Jonathan Gray <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>
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Signed-off-by: Emil Velikov <[email protected]>
Acked-by: Vedran Miletić <[email protected]>
Acked-by: Juha-Pekka Heikkila <[email protected]>
Reviewed-by: Edward O'Callaghan <[email protected]>
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We're about to use the build-id as the starting point for another SHA1
hash in the Intel Vulkan driver, and returning a pointer is far more
convenient.
Reviewed-by: Chad Versace <[email protected]>
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Provides the ability to read the .note.gnu.build-id section of ELF
binaries, which is inserted by the --build-id=... flag to ld.
Reviewed-by: Emil Velikov <[email protected]>
Reviewed-by: Chad Versace <[email protected]>
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