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| author | Louis Mayencourt <louis.mayencourt@arm.com> | 2019-07-09 11:40:55 +0100 |
|---|---|---|
| committer | Louis Mayencourt <louis.mayencourt@arm.com> | 2019-07-17 10:43:48 +0100 |
| commit | b8b31ad00046e163c40427758ec8cf976008e99b (patch) | |
| tree | 85dead6c1119f9bf03a280a8b864d73a80efabcd /lib/psci/psci_on.c | |
| parent | 2cbeee4d519bac0d79da98faae969fae9f9558f9 (diff) | |
backtrace: Strip PAC field when PAUTH is enabled
When pointer authentication is enabled, the LR value saved on the stack
contains a Pointer Authentication Code (PAC). It must be stripped to
retrieve the return address.
The PAC field is stored on the high bits of the address and defined as:
- PAC field = Xn[54:bottom_PAC_bit], when address tagging is used.
- PAC field = Xn[63:56, 54:bottom_PAC_bit], without address tagging.
With bottom_PAC_bit = 64 - TCR_ELx.TnSZ
Change-Id: I21d804e58200dfeca1da4c2554690bed5d191936
Signed-off-by: Louis Mayencourt <louis.mayencourt@arm.com>
Diffstat (limited to 'lib/psci/psci_on.c')
0 files changed, 0 insertions, 0 deletions