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Diffstat (limited to 'gdb/aarch64-linux-tdep.c')
-rw-r--r--gdb/aarch64-linux-tdep.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
index 1f3e888e40d..ba5757d276b 100644
--- a/gdb/aarch64-linux-tdep.c
+++ b/gdb/aarch64-linux-tdep.c
@@ -1062,6 +1062,11 @@ aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* Syscall record. */
tdep->aarch64_syscall_record = aarch64_linux_syscall_record;
+ /* The top byte of a user space address known as the "tag",
+ is ignored by the kernel and can be regarded as additional
+ data associated with the address. */
+ set_gdbarch_significant_addr_bit (gdbarch, 56);
+
/* Initialize the aarch64_linux_record_tdep. */
/* These values are the size of the type that will be used in a system
call. They are obtained from Linux Kernel source. */