/* Target-dependent code for GNU/Linux AArch64.
- Copyright (C) 2009-2021 Free Software Foundation, Inc.
+ Copyright (C) 2009-2022 Free Software Foundation, Inc.
Contributed by ARM Ltd.
This file is part of GDB.
#include "arch-utils.h"
#include "value.h"
+#include "gdbsupport/selftest.h"
+
/* Signal frame handling.
+------------+ ^
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
CORE_ADDR sp = get_frame_register_unsigned (this_frame, AARCH64_SP_REGNUM);
CORE_ADDR sigcontext_addr = (sp + AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET
+ AARCH64_UCONTEXT_SIGCONTEXT_OFFSET );
gdb_byte *header = (gdb_byte *) buf;
struct gdbarch *gdbarch = regcache->arch ();
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- uint64_t vq = gdbarch_tdep (gdbarch)->vq;
+ aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
+ uint64_t vq = tdep->vq;
gdb_assert (buf != NULL);
gdb_assert (size > SVE_HEADER_SIZE);
void *cb_data,
const struct regcache *regcache)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
cb (".reg", AARCH64_LINUX_SIZEOF_GREGSET, AARCH64_LINUX_SIZEOF_GREGSET,
&aarch64_linux_gregset, NULL, cb_data);
{
{ 32, AARCH64_SVE_Z0_REGNUM, (int) (tdep->vq * 16) },
{ 16, AARCH64_SVE_P0_REGNUM, (int) (tdep->vq * 16 / 8) },
- { 1, AARCH64_SVE_FFR_REGNUM, 4 },
+ { 1, AARCH64_SVE_FFR_REGNUM, (int) (tdep->vq * 16 / 8) },
{ 1, AARCH64_FPSR_REGNUM, 4 },
{ 1, AARCH64_FPCR_REGNUM, 4 },
{ 0 }
AARCH64_LINUX_SIZEOF_PAUTH, &aarch64_linux_pauth_regset,
"pauth registers", cb_data);
}
+
+ /* Handle MTE registers. */
+ if (tdep->has_mte ())
+ {
+ /* Create this on the fly in order to handle the variable location. */
+ const struct regcache_map_entry mte_regmap[] =
+ {
+ { 1, tdep->mte_reg_base, 8},
+ { 0 }
+ };
+
+ const struct regset aarch64_linux_mte_regset =
+ {
+ mte_regmap, regcache_supply_regset, regcache_collect_regset
+ };
+
+ cb (".reg-aarch-mte", AARCH64_LINUX_SIZEOF_MTE_REGSET,
+ AARCH64_LINUX_SIZEOF_MTE_REGSET, &aarch64_linux_mte_regset,
+ "MTE registers", cb_data);
+ }
}
/* Implement the "core_read_description" gdbarch method. */
if (syscall_gdb < 0)
{
- printf_unfiltered (_("Process record and replay target doesn't "
- "support syscall number %s\n"),
- plongest (svc_number));
+ fprintf_unfiltered (gdb_stderr,
+ _("Process record and replay target doesn't "
+ "support syscall number %s\n"),
+ plongest (svc_number));
return -1;
}
CORE_ADDR addr = value_as_address (address);
/* Fetch the allocation tag for ADDRESS. */
- gdb::optional<CORE_ADDR> atag = aarch64_mte_get_atag (addr);
+ gdb::optional<CORE_ADDR> atag
+ = aarch64_mte_get_atag (address_significant (gdbarch, addr));
if (!atag.has_value ())
return true;
/* Update the value's content with the tag. */
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- gdb_byte *srcbuf = value_contents_raw (address);
+ gdb_byte *srcbuf = value_contents_raw (address).data ();
store_unsigned_integer (srcbuf, sizeof (addr), byte_order, addr);
}
else
{
+ /* Remove the top byte. */
+ addr = address_significant (gdbarch, addr);
+
/* Make sure we are dealing with a tagged address to begin with. */
if (!aarch64_linux_tagged_address_p (gdbarch, address))
return false;
if (!aarch64_linux_tagged_address_p (gdbarch, address))
return nullptr;
+ /* Remove the top byte. */
+ addr = address_significant (gdbarch, addr);
gdb::optional<CORE_ADDR> atag = aarch64_mte_get_atag (addr);
if (!atag.has_value ())
return string_printf ("0x%s", phex_nz (tag, sizeof (tag)));
}
+/* AArch64 Linux implementation of the report_signal_info gdbarch
+ hook. Displays information about possible memory tag violations. */
+
+static void
+aarch64_linux_report_signal_info (struct gdbarch *gdbarch,
+ struct ui_out *uiout,
+ enum gdb_signal siggnal)
+{
+ aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
+
+ if (!tdep->has_mte () || siggnal != GDB_SIGNAL_SEGV)
+ return;
+
+ CORE_ADDR fault_addr = 0;
+ long si_code = 0;
+
+ try
+ {
+ /* Sigcode tells us if the segfault is actually a memory tag
+ violation. */
+ si_code = parse_and_eval_long ("$_siginfo.si_code");
+
+ fault_addr
+ = parse_and_eval_long ("$_siginfo._sifields._sigfault.si_addr");
+ }
+ catch (const gdb_exception_error &exception)
+ {
+ exception_print (gdb_stderr, exception);
+ return;
+ }
+
+ /* If this is not a memory tag violation, just return. */
+ if (si_code != SEGV_MTEAERR && si_code != SEGV_MTESERR)
+ return;
+
+ uiout->text ("\n");
+
+ uiout->field_string ("sigcode-meaning", _("Memory tag violation"));
+
+ /* For synchronous faults, show additional information. */
+ if (si_code == SEGV_MTESERR)
+ {
+ uiout->text (_(" while accessing address "));
+ uiout->field_core_addr ("fault-addr", gdbarch, fault_addr);
+ uiout->text ("\n");
+
+ gdb::optional<CORE_ADDR> atag
+ = aarch64_mte_get_atag (address_significant (gdbarch, fault_addr));
+ gdb_byte ltag = aarch64_mte_get_ltag (fault_addr);
+
+ if (!atag.has_value ())
+ uiout->text (_("Allocation tag unavailable"));
+ else
+ {
+ uiout->text (_("Allocation tag "));
+ uiout->field_string ("allocation-tag", hex_string (*atag));
+ uiout->text ("\n");
+ uiout->text (_("Logical tag "));
+ uiout->field_string ("logical-tag", hex_string (ltag));
+ }
+ }
+ else
+ {
+ uiout->text ("\n");
+ uiout->text (_("Fault address unavailable"));
+ }
+}
+
static void
aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
NULL };
static const char *const stap_register_indirection_suffixes[] = { "]",
NULL };
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
tdep->lowest_pc = 0x8000;
linux_init_abi (info, gdbarch, 1);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_lp64_fetch_link_map_offsets);
+ linux_lp64_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
/* Register a hook for converting a memory tag to a string. */
set_gdbarch_memtag_to_string (gdbarch, aarch64_linux_memtag_to_string);
+
+ set_gdbarch_report_signal_info (gdbarch,
+ aarch64_linux_report_signal_info);
}
/* Initialize the aarch64_linux_record_tdep. */
set_gdbarch_gcc_target_options (gdbarch, aarch64_linux_gcc_target_options);
}
+#if GDB_SELF_TEST
+
+namespace selftests {
+
+/* Verify functions to read and write logical tags. */
+
+static void
+aarch64_linux_ltag_tests (void)
+{
+ /* We have 4 bits of tags, but we test writing all the bits of the top
+ byte of address. */
+ for (int i = 0; i < 1 << 8; i++)
+ {
+ CORE_ADDR addr = ((CORE_ADDR) i << 56) | 0xdeadbeef;
+ SELF_CHECK (aarch64_mte_get_ltag (addr) == (i & 0xf));
+
+ addr = aarch64_mte_set_ltag (0xdeadbeef, i);
+ SELF_CHECK (addr = ((CORE_ADDR) (i & 0xf) << 56) | 0xdeadbeef);
+ }
+}
+
+} // namespace selftests
+#endif /* GDB_SELF_TEST */
+
void _initialize_aarch64_linux_tdep ();
void
_initialize_aarch64_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_aarch64, 0, GDB_OSABI_LINUX,
aarch64_linux_init_abi);
+
+#if GDB_SELF_TEST
+ selftests::register_test ("aarch64-linux-tagged-address",
+ selftests::aarch64_linux_ltag_tests);
+#endif
}
projects / binutils-gdb.git / blobdiff