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| author | Koudai Iwahori <koudai@google.com> | 2022-10-04 04:21:35 -0700 |
|---|---|---|
| committer | Antonio Borneo <borneo.antonio@gmail.com> | 2023-01-15 14:51:44 +0000 |
| commit | d0436b0cdabb2106701222628d78932c973a1e62 (patch) | |
| tree | 0055aa21084ebfa6dd8c6ecaa289e9a6d9105257 /doc/openocd.texi | |
| parent | d96dc47ef67e427cd64a07d9825fd297e3a81633 (diff) | |
| download | riscv-openocd-d0436b0cdabb2106701222628d78932c973a1e62.zip riscv-openocd-d0436b0cdabb2106701222628d78932c973a1e62.tar.gz riscv-openocd-d0436b0cdabb2106701222628d78932c973a1e62.tar.bz2 | |
armv8: Add support of pointer authentication
When pointer authentication is enabled, some upper bits of the link
register (LR[63:VA_SIZE]) are used to store a signature. Therefore, GDB
need to remove the signature to get backtraces.
GDB has support of pointer authentication. When pointer authenticaion is
enabled, GDB requests 8-bytes mask to the target to remove the
signature. mask[63:VA_SIZE] should be all set and mask[VA_SIZE-1:0]
should be all cleared. GDB removes the signature by addr&~mask or
addr|mask.
I added a feature to provide the mask for pointer authentication.
Signed-off-by: Koudai Iwahori <koudai@google.com>
Change-Id: I56fbbf9cc23619b6536ecd326f350c8bf137f322
Reviewed-on: https://review.openocd.org/c/openocd/+/7248
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Diffstat (limited to 'doc/openocd.texi')
| -rw-r--r-- | doc/openocd.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/openocd.texi b/doc/openocd.texi index c7fee3e..aa1707b 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -10297,6 +10297,16 @@ the target, the exception catch must be disabled again with @command{$target_nam Issuing the command without options prints the current configuration. @end deffn +@deffn {Command} {$target_name pauth} [@option{off}|@option{on}] +Enable or disable pointer authentication features. +When pointer authentication is used on ARM cores, GDB asks GDB servers for an 8-bytes mask to remove signature bits added by pointer authentication. +If this feature is enabled, OpenOCD provides GDB with an 8-bytes mask. +Pointer authentication feature is broken until gdb 12.1, going to be fixed. +Consider using a newer version of gdb if you want to enable pauth feature. +The default configuration is @option{off}. +@end deffn + + @section EnSilica eSi-RISC Architecture eSi-RISC is a highly configurable microprocessor architecture for embedded systems |