Searched hist:c35dfd95ce514b5619cc56ddc7ee37b6fe44733e (Results 1 – 3 of 3) sorted by relevance
| /optee_os/ldelf/ |
| H A D | main.c | c35dfd95ce514b5619cc56ddc7ee37b6fe44733e Tue Jul 30 06:39:27 UTC 2019 Jens Wiklander <jens.wiklander@linaro.org> ldelf: accurate non-legacy TA check
Prior to this patch ldelf relied on e_entry in the ELF header to point
anywhere but at the lowest possible executable address to tell that it's
not a legacy TA. This isn't enough since all TAs can use this entry
address depending on compiler and linker. The only reliable indicator
that the TA is not a legacy TA is that the depr_entry field of the TA
header is UINT64_MAX. Unfortunately this means assuming that the ELF is
not a legacy TA at load time and that the process needs to be restarted
in case it turns out that it was a legacy TA.
With this patch we have reliable detection of non-legacy TAs, but with
increased load time for legacy TAs since the main ELF needs to be loaded
and verified twice due to the TA store interface.
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
|
| H A D | ta_elf.h | c35dfd95ce514b5619cc56ddc7ee37b6fe44733e Tue Jul 30 06:39:27 UTC 2019 Jens Wiklander <jens.wiklander@linaro.org> ldelf: accurate non-legacy TA check
Prior to this patch ldelf relied on e_entry in the ELF header to point
anywhere but at the lowest possible executable address to tell that it's
not a legacy TA. This isn't enough since all TAs can use this entry
address depending on compiler and linker. The only reliable indicator
that the TA is not a legacy TA is that the depr_entry field of the TA
header is UINT64_MAX. Unfortunately this means assuming that the ELF is
not a legacy TA at load time and that the process needs to be restarted
in case it turns out that it was a legacy TA.
With this patch we have reliable detection of non-legacy TAs, but with
increased load time for legacy TAs since the main ELF needs to be loaded
and verified twice due to the TA store interface.
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
|
| H A D | ta_elf.c | c35dfd95ce514b5619cc56ddc7ee37b6fe44733e Tue Jul 30 06:39:27 UTC 2019 Jens Wiklander <jens.wiklander@linaro.org> ldelf: accurate non-legacy TA check
Prior to this patch ldelf relied on e_entry in the ELF header to point
anywhere but at the lowest possible executable address to tell that it's
not a legacy TA. This isn't enough since all TAs can use this entry
address depending on compiler and linker. The only reliable indicator
that the TA is not a legacy TA is that the depr_entry field of the TA
header is UINT64_MAX. Unfortunately this means assuming that the ELF is
not a legacy TA at load time and that the process needs to be restarted
in case it turns out that it was a legacy TA.
With this patch we have reliable detection of non-legacy TAs, but with
increased load time for legacy TAs since the main ELF needs to be loaded
and verified twice due to the TA store interface.
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
|