diff options
Diffstat (limited to 'gdb/gdbserver/linux-aarch64-low.c')
| -rw-r--r-- | gdb/gdbserver/linux-aarch64-low.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/gdb/gdbserver/linux-aarch64-low.c b/gdb/gdbserver/linux-aarch64-low.c index dcc19ce18c0..6cea4b215ae 100644 --- a/gdb/gdbserver/linux-aarch64-low.c +++ b/gdb/gdbserver/linux-aarch64-low.c @@ -3042,7 +3042,26 @@ aarch64_supports_hardware_single_step (void) static bool aarch64_validate_tdesc (struct thread_info *thread) { - return true; + /* For SVE there is a target descriptor for each VL. Read the current vector + length and check if it matches the size of a variable register in the + current target descriptor. */ + + int tid = (ptid_of (thread)).lwp (); + long vl = sve_vl_from_vq (aarch64_sve_get_vq (tid)); + struct regcache *regcache = thread_regcache_data (thread); + struct process_info *proc; + + /* Non SVE targets always validate as true. */ + if (vl == 0) + return true; + + /* If there is a register cache, check the z0 register size. */ + if (regcache) + return (register_size (regcache->tdesc, AARCH64_SVE_Z0_REGNUM) == vl); + + /* Otherwise, check the z0 register size in the description. */ + proc = get_thread_process (thread); + return (register_size (proc->tdesc, AARCH64_SVE_Z0_REGNUM) == vl); } struct linux_target_ops the_low_target = |