diff options
Diffstat (limited to 'gdbserver/linux-aarch64-low.cc')
| -rw-r--r-- | gdbserver/linux-aarch64-low.cc | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/gdbserver/linux-aarch64-low.cc b/gdbserver/linux-aarch64-low.cc index 7dabd57..9d3ac80 100644 --- a/gdbserver/linux-aarch64-low.cc +++ b/gdbserver/linux-aarch64-low.cc @@ -1,7 +1,7 @@ /* GNU/Linux/AArch64 specific low level interface, for the remote server for GDB. - Copyright (C) 2009-2024 Free Software Foundation, Inc. + Copyright (C) 2009-2025 Free Software Foundation, Inc. Contributed by ARM Ltd. This file is part of GDB. @@ -39,6 +39,7 @@ #include "gdb_proc_service.h" #include "arch/aarch64.h" +#include "arch/aarch64-gcs-linux.h" #include "arch/aarch64-mte-linux.h" #include "arch/aarch64-scalable-linux.h" #include "linux-aarch32-tdesc.h" @@ -321,6 +322,42 @@ aarch64_store_tlsregset (struct regcache *regcache, const void *buf) supply_register (regcache, *regnum, tls_buf + sizeof (uint64_t)); } +/* Fill BUF with the GCS registers from REGCACHE. */ + +static void +aarch64_fill_gcsregset (regcache *regcache, void *buf) +{ + user_gcs *regset = (user_gcs *) buf; + int gcspr_regnum = find_regno (regcache->tdesc, "gcspr"); + int features_enabled_regnum = find_regno (regcache->tdesc, + "gcs_features_enabled"); + int features_locked_regnum = find_regno (regcache->tdesc, + "gcs_features_locked"); + + collect_register (regcache, gcspr_regnum, ®set->gcspr_el0); + collect_register (regcache, features_enabled_regnum, + ®set->features_enabled); + collect_register (regcache, features_locked_regnum, ®set->features_locked); +} + +/* Store the GCS registers in BUF to REGCACHE. */ + +static void +aarch64_store_gcsregset (regcache *regcache, const void *buf) +{ + const user_gcs *regset = (const user_gcs *) buf; + int gcspr_regnum = find_regno (regcache->tdesc, "gcspr"); + int features_enabled_regnum = find_regno (regcache->tdesc, + "gcs_features_enabled"); + int features_locked_regnum = find_regno (regcache->tdesc, + "gcs_features_locked"); + + supply_register (regcache, gcspr_regnum, ®set->gcspr_el0); + supply_register (regcache, features_enabled_regnum, + ®set->features_enabled); + supply_register (regcache, features_locked_regnum, ®set->features_locked); +} + bool aarch64_target::low_supports_breakpoints () { @@ -846,6 +883,10 @@ static struct regset_info aarch64_regsets[] = { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_TLS, 0, OPTIONAL_REGS, aarch64_fill_tlsregset, aarch64_store_tlsregset }, + /* Guarded Control Stack registers. */ + { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_GCS, + 0, OPTIONAL_REGS, + aarch64_fill_gcsregset, aarch64_store_gcsregset }, NULL_REGSET }; @@ -909,6 +950,10 @@ aarch64_adjust_register_sets (const struct aarch64_features &features) if (features.sme2) regset->size = AARCH64_SME2_ZT0_SIZE; break; + case NT_ARM_GCS: + if (features.gcs_linux) + regset->size = sizeof (user_gcs); + break; default: gdb_assert_not_reached ("Unknown register set found."); } @@ -940,6 +985,7 @@ aarch64_target::low_arch_setup () /* A-profile MTE is 64-bit only. */ features.mte = linux_get_hwcap2 (pid, 8) & HWCAP2_MTE; features.tls = aarch64_tls_register_count (tid); + features.gcs = features.gcs_linux = linux_get_hwcap (pid, 8) & HWCAP_GCS; /* Scalable Matrix Extension feature and size check. */ if (linux_get_hwcap2 (pid, 8) & HWCAP2_SME) |