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Pointer Authentication is a new feature in AArch64 v8.3-a. When enabled in the compiler, function return addresses will be mangled by the kernel. Add register description xml and wire up to aarch64_linux_read_description. This description includes the two pauth user registers. Nothing yet uses the feature - that is added in later patches. gdb/ChangeLog: * aarch64-linux-nat.c (aarch64_linux_nat_target::read_description): Add pauth param. * aarch64-linux-tdep.c (aarch64_linux_core_read_description): Likewise. * aarch64-tdep.c (struct target_desc): Add in pauth. (aarch64_read_description): Add pauth param. (aarch64_gdbarch_init): Likewise. * aarch64-tdep.h (aarch64_read_description): Likewise. * arch/aarch64.c (aarch64_create_target_description): Likewise. * arch/aarch64.h (aarch64_create_target_description): Likewise. * features/Makefile: Add new files. * features/aarch64-pauth.c: New file. * features/aarch64-pauth.xml: New file. gdb/doc/ChangeLog: * gdb.texinfo: Describe pauth feature. gdb/gdbserver/ChangeLog: * linux-aarch64-ipa.c (get_ipa_tdesc): Add pauth param. (initialize_low_tracepoint): Likewise. * linux-aarch64-low.c (aarch64_arch_setup): Likewise. * linux-aarch64-tdesc-selftest.c (aarch64_tdesc_test): Likewise. * linux-aarch64-tdesc.c (struct target_desc): Likewise. (aarch64_linux_read_description): Likewise. * linux-aarch64-tdesc.h (aarch64_linux_read_description): Likewise.
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/* GNU/Linux/aarch64 specific target description, for the remote server
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for GDB.
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Copyright (C) 2017-2019 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "tdesc.h"
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#include "arch/aarch64.h"
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#include "linux-aarch32-low.h"
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#include <inttypes.h>
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/* All possible aarch64 target descriptors. */
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struct target_desc *tdesc_aarch64_list[AARCH64_MAX_SVE_VQ + 1][2/*pauth*/];
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/* Create the aarch64 target description. */
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const target_desc *
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aarch64_linux_read_description (uint64_t vq, bool pauth_p)
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{
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if (vq > AARCH64_MAX_SVE_VQ)
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error (_("VQ is %" PRIu64 ", maximum supported value is %d"), vq,
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AARCH64_MAX_SVE_VQ);
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struct target_desc *tdesc = tdesc_aarch64_list[vq][pauth_p];
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if (tdesc == NULL)
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{
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tdesc = aarch64_create_target_description (vq, pauth_p);
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static const char *expedite_regs_aarch64[] = { "x29", "sp", "pc", NULL };
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static const char *expedite_regs_aarch64_sve[] = { "x29", "sp", "pc",
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"vg", NULL };
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if (vq == 0)
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init_target_desc (tdesc, expedite_regs_aarch64);
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else
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init_target_desc (tdesc, expedite_regs_aarch64_sve);
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tdesc_aarch64_list[vq][pauth_p] = tdesc;
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}
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return tdesc;
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}
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