/* Target-dependent code for GNU/Linux AArch64.
- Copyright (C) 2009-2017 Free Software Foundation, Inc.
+ Copyright (C) 2009-2018 Free Software Foundation, Inc.
Contributed by ARM Ltd.
This file is part of GDB.
#include "record-full.h"
#include "linux-record.h"
+#include "auxv.h"
+#include "elf/common.h"
/* Signal frame handling.
{
/* movz x8, 0x8b (S=1,o=10,h=0,i=0x8b,r=8)
Soo1 0010 1hhi iiii iiii iiii iiir rrrr */
- {0xd2801168, -1},
+ {0xd2801168, ULONGEST_MAX},
/* svc 0x0 (o=0, l=1)
1101 0100 oooi iiii iiii iiii iii0 00ll */
- {0xd4000001, -1},
- {TRAMP_SENTINEL_INSN, -1}
+ {0xd4000001, ULONGEST_MAX},
+ {TRAMP_SENTINEL_INSN, ULONGEST_MAX}
},
aarch64_linux_sigframe_init
};
regcache_supply_regset, regcache_collect_regset
};
+/* The fields in an SVE header at the start of a SVE regset. */
+
+#define SVE_HEADER_SIZE_LENGTH 4
+#define SVE_HEADER_MAX_SIZE_LENGTH 4
+#define SVE_HEADER_VL_LENGTH 2
+#define SVE_HEADER_MAX_VL_LENGTH 2
+#define SVE_HEADER_FLAGS_LENGTH 2
+#define SVE_HEADER_RESERVED_LENGTH 2
+
+#define SVE_HEADER_SIZE_OFFSET 0
+#define SVE_HEADER_MAX_SIZE_OFFSET \
+ (SVE_HEADER_SIZE_OFFSET + SVE_HEADER_SIZE_LENGTH)
+#define SVE_HEADER_VL_OFFSET \
+ (SVE_HEADER_MAX_SIZE_OFFSET + SVE_HEADER_MAX_SIZE_LENGTH)
+#define SVE_HEADER_MAX_VL_OFFSET \
+ (SVE_HEADER_VL_OFFSET + SVE_HEADER_VL_LENGTH)
+#define SVE_HEADER_FLAGS_OFFSET \
+ (SVE_HEADER_MAX_VL_OFFSET + SVE_HEADER_MAX_VL_LENGTH)
+#define SVE_HEADER_RESERVED_OFFSET \
+ (SVE_HEADER_FLAGS_OFFSET + SVE_HEADER_FLAGS_LENGTH)
+#define SVE_HEADER_SIZE \
+ (SVE_HEADER_RESERVED_OFFSET + SVE_HEADER_RESERVED_LENGTH)
+
+#define SVE_HEADER_FLAG_SVE 1
+
+/* Get VQ value from SVE section in the core dump. */
+
+static uint64_t
+aarch64_linux_core_read_vq (struct gdbarch *gdbarch, bfd *abfd)
+{
+ gdb_byte header[SVE_HEADER_SIZE];
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ asection *sve_section = bfd_get_section_by_name (abfd, ".reg-aarch-sve");
+
+ if (sve_section == nullptr)
+ {
+ /* No SVE state. */
+ return 0;
+ }
+
+ size_t size = bfd_section_size (abfd, sve_section);
+
+ /* Check extended state size. */
+ if (size < SVE_HEADER_SIZE)
+ {
+ warning (_("'.reg-aarch-sve' section in core file too small."));
+ return 0;
+ }
+
+ if (!bfd_get_section_contents (abfd, sve_section, header, 0, SVE_HEADER_SIZE))
+ {
+ warning (_("Couldn't read sve header from "
+ "'.reg-aarch-sve' section in core file."));
+ return 0;
+ }
+
+ uint64_t vl = extract_unsigned_integer (header + SVE_HEADER_VL_OFFSET,
+ SVE_HEADER_VL_LENGTH, byte_order);
+ uint64_t vq = sve_vq_from_vl (vl);
+
+ if (vq > AARCH64_MAX_SVE_VQ)
+ {
+ warning (_("SVE Vector length in core file not supported by this version"
+ " of GDB. (VQ=%s)"), pulongest (vq));
+ return 0;
+ }
+ else if (vq == 0)
+ {
+ warning (_("SVE Vector length in core file is invalid. (VQ=%s"),
+ pulongest (vq));
+ return 0;
+ }
+
+ return vq;
+}
+
+/* Supply register REGNUM from BUF to REGCACHE, using the register map
+ in REGSET. If REGNUM is -1, do this for all registers in REGSET.
+ If BUF is NULL, set the registers to "unavailable" status. */
+
+static void
+aarch64_linux_supply_sve_regset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *buf, size_t size)
+{
+ gdb_byte *header = (gdb_byte *) buf;
+ struct gdbarch *gdbarch = regcache->arch ();
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+ if (buf == nullptr)
+ return regcache->supply_regset (regset, regnum, nullptr, size);
+ gdb_assert (size > SVE_HEADER_SIZE);
+
+ /* BUF contains an SVE header followed by a register dump of either the
+ passed in SVE regset or a NEON fpregset. */
+
+ /* Extract required fields from the header. */
+ uint64_t vl = extract_unsigned_integer (header + SVE_HEADER_VL_OFFSET,
+ SVE_HEADER_VL_LENGTH, byte_order);
+ uint16_t flags = extract_unsigned_integer (header + SVE_HEADER_FLAGS_OFFSET,
+ SVE_HEADER_FLAGS_LENGTH,
+ byte_order);
+
+ if (regnum == -1 || regnum == AARCH64_SVE_VG_REGNUM)
+ {
+ gdb_byte vg_target[8];
+ store_integer ((gdb_byte *)&vg_target, sizeof (uint64_t), byte_order,
+ sve_vg_from_vl (vl));
+ regcache->raw_supply (AARCH64_SVE_VG_REGNUM, &vg_target);
+ }
+
+ if (flags & SVE_HEADER_FLAG_SVE)
+ {
+ /* Register dump is a SVE structure. */
+ regcache->supply_regset (regset, regnum,
+ (gdb_byte *) buf + SVE_HEADER_SIZE,
+ size - SVE_HEADER_SIZE);
+ }
+ else
+ {
+ /* Register dump is a fpsimd structure. First clear the SVE
+ registers. */
+ for (int i = 0; i < AARCH64_SVE_Z_REGS_NUM; i++)
+ regcache->raw_supply_zeroed (AARCH64_SVE_Z0_REGNUM + i);
+ for (int i = 0; i < AARCH64_SVE_P_REGS_NUM; i++)
+ regcache->raw_supply_zeroed (AARCH64_SVE_P0_REGNUM + i);
+ regcache->raw_supply_zeroed (AARCH64_SVE_FFR_REGNUM);
+
+ /* Then supply the fpsimd registers. */
+ regcache->supply_regset (&aarch64_linux_fpregset, regnum,
+ (gdb_byte *) buf + SVE_HEADER_SIZE,
+ size - SVE_HEADER_SIZE);
+ }
+}
+
+/* Collect register REGNUM from REGCACHE to BUF, using the register
+ map in REGSET. If REGNUM is -1, do this for all registers in
+ REGSET. */
+
+static void
+aarch64_linux_collect_sve_regset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *buf, size_t size)
+{
+ 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;
+
+ gdb_assert (buf != NULL);
+ gdb_assert (size > SVE_HEADER_SIZE);
+
+ /* BUF starts with a SVE header prior to the register dump. */
+
+ store_unsigned_integer (header + SVE_HEADER_SIZE_OFFSET,
+ SVE_HEADER_SIZE_LENGTH, byte_order, size);
+ store_unsigned_integer (header + SVE_HEADER_MAX_SIZE_OFFSET,
+ SVE_HEADER_MAX_SIZE_LENGTH, byte_order, size);
+ store_unsigned_integer (header + SVE_HEADER_VL_OFFSET, SVE_HEADER_VL_LENGTH,
+ byte_order, sve_vl_from_vq (vq));
+ store_unsigned_integer (header + SVE_HEADER_MAX_VL_OFFSET,
+ SVE_HEADER_MAX_VL_LENGTH, byte_order,
+ sve_vl_from_vq (vq));
+ store_unsigned_integer (header + SVE_HEADER_FLAGS_OFFSET,
+ SVE_HEADER_FLAGS_LENGTH, byte_order,
+ SVE_HEADER_FLAG_SVE);
+ store_unsigned_integer (header + SVE_HEADER_RESERVED_OFFSET,
+ SVE_HEADER_RESERVED_LENGTH, byte_order, 0);
+
+ /* The SVE register dump follows. */
+ regcache->collect_regset (regset, regnum, (gdb_byte *) buf + SVE_HEADER_SIZE,
+ size - SVE_HEADER_SIZE);
+}
+
/* Implement the "regset_from_core_section" gdbarch method. */
static void
void *cb_data,
const struct regcache *regcache)
{
- cb (".reg", AARCH64_LINUX_SIZEOF_GREGSET, &aarch64_linux_gregset,
- NULL, cb_data);
- cb (".reg2", AARCH64_LINUX_SIZEOF_FPREGSET, &aarch64_linux_fpregset,
- NULL, cb_data);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ cb (".reg", AARCH64_LINUX_SIZEOF_GREGSET, AARCH64_LINUX_SIZEOF_GREGSET,
+ &aarch64_linux_gregset, NULL, cb_data);
+
+ if (tdep->has_sve ())
+ {
+ /* Create this on the fly in order to handle vector register sizes. */
+ const struct regcache_map_entry sve_regmap[] =
+ {
+ { 32, AARCH64_SVE_Z0_REGNUM, tdep->vq * 16 },
+ { 16, AARCH64_SVE_P0_REGNUM, tdep->vq * 16 / 8 },
+ { 1, AARCH64_SVE_FFR_REGNUM, 4 },
+ { 1, AARCH64_FPSR_REGNUM, 4 },
+ { 1, AARCH64_FPCR_REGNUM, 4 },
+ { 0 }
+ };
+
+ const struct regset aarch64_linux_sve_regset =
+ {
+ sve_regmap,
+ aarch64_linux_supply_sve_regset, aarch64_linux_collect_sve_regset,
+ REGSET_VARIABLE_SIZE
+ };
+
+ cb (".reg-aarch-sve",
+ SVE_HEADER_SIZE + regcache_map_entry_size (aarch64_linux_fpregmap),
+ SVE_HEADER_SIZE + regcache_map_entry_size (sve_regmap),
+ &aarch64_linux_sve_regset, "SVE registers", cb_data);
+ }
+ else
+ cb (".reg2", AARCH64_LINUX_SIZEOF_FPREGSET, AARCH64_LINUX_SIZEOF_FPREGSET,
+ &aarch64_linux_fpregset, NULL, cb_data);
+}
+
+/* Implement the "core_read_description" gdbarch method. */
+
+static const struct target_desc *
+aarch64_linux_core_read_description (struct gdbarch *gdbarch,
+ struct target_ops *target, bfd *abfd)
+{
+ CORE_ADDR aarch64_hwcap = 0;
+
+ if (target_auxv_search (target, AT_HWCAP, &aarch64_hwcap) != 1)
+ return NULL;
+
+ return aarch64_read_description (aarch64_linux_core_read_vq (gdbarch, abfd));
}
/* Implementation of `gdbarch_stap_is_single_operand', as defined in
regname, p->saved_arg);
++tmp;
- tmp = skip_spaces_const (tmp);
+ tmp = skip_spaces (tmp);
/* Now we expect a number. It can begin with '#' or simply
a digit. */
if (*tmp == '#')
static LONGEST
aarch64_linux_get_syscall_number (struct gdbarch *gdbarch,
- ptid_t ptid)
+ thread_info *thread)
{
- struct regcache *regs = get_thread_regcache (ptid);
+ struct regcache *regs = get_thread_regcache (thread);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* The content of register x8. */
LONGEST ret;
/* Getting the system call number from the register x8. */
- regcache_cooked_read (regs, AARCH64_DWARF_X0 + 8, buf);
+ regs->cooked_read (AARCH64_DWARF_X0 + 8, buf);
ret = extract_signed_integer (buf, X_REGISTER_SIZE, byte_order);
return 0;
}
+/* Implement the "gcc_target_options" gdbarch method. */
+
+static char *
+aarch64_linux_gcc_target_options (struct gdbarch *gdbarch)
+{
+ /* GCC doesn't know "-m64". */
+ return NULL;
+}
+
static void
aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
set_gdbarch_iterate_over_regset_sections
(gdbarch, aarch64_linux_iterate_over_regset_sections);
+ set_gdbarch_core_read_description
+ (gdbarch, aarch64_linux_core_read_description);
/* SystemTap related. */
set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes);
/* 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. */
set_gdbarch_displaced_step_location (gdbarch, linux_displaced_step_location);
set_gdbarch_displaced_step_hw_singlestep (gdbarch,
aarch64_displaced_step_hw_singlestep);
-}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern initialize_file_ftype _initialize_aarch64_linux_tdep;
+ set_gdbarch_gcc_target_options (gdbarch, aarch64_linux_gcc_target_options);
+}
void
_initialize_aarch64_linux_tdep (void)
projects / deliverable / binutils-gdb.git / blobdiff