/* Common target dependent code for GDB on AArch64 systems.
- Copyright (C) 2009-2015 Free Software Foundation, Inc.
+ Copyright (C) 2009-2016 Free Software Foundation, Inc.
Contributed by ARM Ltd.
This file is part of GDB.
typedef struct
{
- /* Value to pass on stack. */
+ /* Value to pass on stack. It can be NULL if this item is for stack
+ padding. */
const gdb_byte *data;
/* Size in bytes of value to pass on stack. */
return TYPE_LENGTH (t);
case TYPE_CODE_ARRAY:
+ if (TYPE_VECTOR (t))
+ {
+ /* Use the natural alignment for vector types (the same for
+ scalar type), but the maximum alignment is 128-bit. */
+ if (TYPE_LENGTH (t) > 16)
+ return 16;
+ else
+ return TYPE_LENGTH (t);
+ }
+ else
+ return aarch64_type_align (TYPE_TARGET_TYPE (t));
case TYPE_CODE_COMPLEX:
return aarch64_type_align (TYPE_TARGET_TYPE (t));
}
}
-/* Return 1 if *TY is a homogeneous floating-point aggregate as
- defined in the AAPCS64 ABI document; otherwise return 0. */
+/* Return 1 if *TY is a homogeneous floating-point aggregate or
+ homogeneous short-vector aggregate as defined in the AAPCS64 ABI
+ document; otherwise return 0. */
static int
-is_hfa (struct type *ty)
+is_hfa_or_hva (struct type *ty)
{
switch (TYPE_CODE (ty))
{
case TYPE_CODE_ARRAY:
{
struct type *target_ty = TYPE_TARGET_TYPE (ty);
- if (TYPE_CODE (target_ty) == TYPE_CODE_FLT && TYPE_LENGTH (ty) <= 4)
+
+ if (TYPE_VECTOR (ty))
+ return 0;
+
+ if (TYPE_LENGTH (ty) <= 4 /* HFA or HVA has at most 4 members. */
+ && (TYPE_CODE (target_ty) == TYPE_CODE_FLT /* HFA */
+ || (TYPE_CODE (target_ty) == TYPE_CODE_ARRAY /* HVA */
+ && TYPE_VECTOR (target_ty))))
return 1;
break;
}
case TYPE_CODE_UNION:
case TYPE_CODE_STRUCT:
{
+ /* HFA or HVA has at most four members. */
if (TYPE_NFIELDS (ty) > 0 && TYPE_NFIELDS (ty) <= 4)
{
struct type *member0_type;
member0_type = check_typedef (TYPE_FIELD_TYPE (ty, 0));
- if (TYPE_CODE (member0_type) == TYPE_CODE_FLT)
+ if (TYPE_CODE (member0_type) == TYPE_CODE_FLT
+ || (TYPE_CODE (member0_type) == TYPE_CODE_ARRAY
+ && TYPE_VECTOR (member0_type)))
{
int i;
static void
pass_in_x (struct gdbarch *gdbarch, struct regcache *regcache,
struct aarch64_call_info *info, struct type *type,
- const bfd_byte *buf)
+ struct value *arg)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int len = TYPE_LENGTH (type);
enum type_code typecode = TYPE_CODE (type);
int regnum = AARCH64_X0_REGNUM + info->ngrn;
+ const bfd_byte *buf = value_contents (arg);
info->argnum++;
pass_in_v (struct gdbarch *gdbarch,
struct regcache *regcache,
struct aarch64_call_info *info,
- const bfd_byte *buf)
+ int len, const bfd_byte *buf)
{
if (info->nsrn < 8)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int regnum = AARCH64_V0_REGNUM + info->nsrn;
+ gdb_byte reg[V_REGISTER_SIZE];
info->argnum++;
info->nsrn++;
- regcache_cooked_write (regcache, regnum, buf);
+ memset (reg, 0, sizeof (reg));
+ /* PCS C.1, the argument is allocated to the least significant
+ bits of V register. */
+ memcpy (reg, buf, len);
+ regcache_cooked_write (regcache, regnum, reg);
+
if (aarch64_debug)
{
debug_printf ("arg %d in %s\n", info->argnum,
static void
pass_on_stack (struct aarch64_call_info *info, struct type *type,
- const bfd_byte *buf)
+ struct value *arg)
{
+ const bfd_byte *buf = value_contents (arg);
int len = TYPE_LENGTH (type);
int align;
stack_item_t item;
int pad = align - (info->nsaa & (align - 1));
item.len = pad;
- item.data = buf;
+ item.data = NULL;
VEC_safe_push (stack_item_t, info->si, &item);
info->nsaa += pad;
static void
pass_in_x_or_stack (struct gdbarch *gdbarch, struct regcache *regcache,
struct aarch64_call_info *info, struct type *type,
- const bfd_byte *buf)
+ struct value *arg)
{
int len = TYPE_LENGTH (type);
int nregs = (len + X_REGISTER_SIZE - 1) / X_REGISTER_SIZE;
/* PCS C.13 - Pass in registers if we have enough spare */
if (info->ngrn + nregs <= 8)
{
- pass_in_x (gdbarch, regcache, info, type, buf);
+ pass_in_x (gdbarch, regcache, info, type, arg);
info->ngrn += nregs;
}
else
{
info->ngrn = 8;
- pass_on_stack (info, type, buf);
+ pass_on_stack (info, type, arg);
}
}
struct regcache *regcache,
struct aarch64_call_info *info,
struct type *type,
- const bfd_byte *buf)
+ struct value *arg)
{
- if (!pass_in_v (gdbarch, regcache, info, buf))
- pass_on_stack (info, type, buf);
+ if (!pass_in_v (gdbarch, regcache, info, TYPE_LENGTH (type),
+ value_contents (arg)))
+ pass_on_stack (info, type, arg);
}
/* Implement the "push_dummy_call" gdbarch method. */
arg_type = builtin_type (gdbarch)->builtin_int32;
arg = value_cast (arg_type, arg);
}
- pass_in_x_or_stack (gdbarch, regcache, &info, arg_type,
- value_contents (arg));
+ pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg);
break;
case TYPE_CODE_COMPLEX:
struct type *target_type =
check_typedef (TYPE_TARGET_TYPE (arg_type));
- pass_in_v (gdbarch, regcache, &info, buf);
pass_in_v (gdbarch, regcache, &info,
+ TYPE_LENGTH (target_type), buf);
+ pass_in_v (gdbarch, regcache, &info,
+ TYPE_LENGTH (target_type),
buf + TYPE_LENGTH (target_type));
}
else
{
info.nsrn = 8;
- pass_on_stack (&info, arg_type, value_contents (arg));
+ pass_on_stack (&info, arg_type, arg);
}
break;
case TYPE_CODE_FLT:
- pass_in_v_or_stack (gdbarch, regcache, &info, arg_type,
- value_contents (arg));
+ pass_in_v_or_stack (gdbarch, regcache, &info, arg_type, arg);
break;
case TYPE_CODE_STRUCT:
case TYPE_CODE_ARRAY:
case TYPE_CODE_UNION:
- if (is_hfa (arg_type))
+ if (is_hfa_or_hva (arg_type))
{
int elements = TYPE_NFIELDS (arg_type);
struct type *field_type =
check_typedef (value_type (field));
- pass_in_v_or_stack (gdbarch, regcache, &info, field_type,
- value_contents_writeable (field));
+ pass_in_v_or_stack (gdbarch, regcache, &info,
+ field_type, field);
}
}
else
{
info.nsrn = 8;
- pass_on_stack (&info, arg_type, value_contents (arg));
+ pass_on_stack (&info, arg_type, arg);
}
}
+ else if (TYPE_CODE (arg_type) == TYPE_CODE_ARRAY
+ && TYPE_VECTOR (arg_type) && (len == 16 || len == 8))
+ {
+ /* Short vector types are passed in V registers. */
+ pass_in_v_or_stack (gdbarch, regcache, &info, arg_type, arg);
+ }
else if (len > 16)
{
/* PCS B.7 Aggregates larger than 16 bytes are passed by
/* Construct the indirection. */
arg_type = lookup_pointer_type (arg_type);
arg = value_from_pointer (arg_type, sp);
- pass_in_x_or_stack (gdbarch, regcache, &info, arg_type,
- value_contents (arg));
+ pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg);
}
else
/* PCS C.15 / C.18 multiple values pass. */
- pass_in_x_or_stack (gdbarch, regcache, &info, arg_type,
- value_contents (arg));
+ pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg);
break;
default:
- pass_in_x_or_stack (gdbarch, regcache, &info, arg_type,
- value_contents (arg));
+ pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg);
break;
}
}
stack_item_t *si = VEC_last (stack_item_t, info.si);
sp -= si->len;
- write_memory (sp, si->data, si->len);
+ if (si->data != NULL)
+ write_memory (sp, si->data, si->len);
VEC_pop (stack_item_t, info.si);
}
memcpy (valbuf, buf, len);
valbuf += len;
}
- else if (is_hfa (type))
+ else if (is_hfa_or_hva (type))
{
int elements = TYPE_NFIELDS (type);
struct type *member_type = check_typedef (TYPE_FIELD_TYPE (type, 0));
for (i = 0; i < elements; i++)
{
int regno = AARCH64_V0_REGNUM + i;
- bfd_byte buf[X_REGISTER_SIZE];
+ bfd_byte buf[V_REGISTER_SIZE];
if (aarch64_debug)
{
- debug_printf ("read HFA return value element %d from %s\n",
+ debug_printf ("read HFA or HVA return value element %d from %s\n",
i + 1,
gdbarch_register_name (gdbarch, regno));
}
valbuf += len;
}
}
+ else if (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type)
+ && (TYPE_LENGTH (type) == 16 || TYPE_LENGTH (type) == 8))
+ {
+ /* Short vector is returned in V register. */
+ gdb_byte buf[V_REGISTER_SIZE];
+
+ regcache_cooked_read (regs, AARCH64_V0_REGNUM, buf);
+ memcpy (valbuf, buf, TYPE_LENGTH (type));
+ }
else
{
/* For a structure or union the behaviour is as if the value had
type = check_typedef (type);
- /* In the AArch64 ABI, "integer" like aggregate types are returned
- in registers. For an aggregate type to be integer like, its size
- must be less than or equal to 4 * X_REGISTER_SIZE. */
-
- if (is_hfa (type))
+ if (is_hfa_or_hva (type))
{
- /* PCS B.5 If the argument is a Named HFA, then the argument is
- used unmodified. */
+ /* v0-v7 are used to return values and one register is allocated
+ for one member. However, HFA or HVA has at most four members. */
return 0;
}
}
}
}
- else if (is_hfa (type))
+ else if (is_hfa_or_hva (type))
{
int elements = TYPE_NFIELDS (type);
struct type *member_type = check_typedef (TYPE_FIELD_TYPE (type, 0));
if (aarch64_debug)
{
- debug_printf ("write HFA return value element %d to %s\n",
+ debug_printf ("write HFA or HVA return value element %d to %s\n",
i + 1,
gdbarch_register_name (gdbarch, regno));
}
valbuf += len;
}
}
+ else if (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type)
+ && (TYPE_LENGTH (type) == 8 || TYPE_LENGTH (type) == 16))
+ {
+ /* Short vector. */
+ gdb_byte buf[V_REGISTER_SIZE];
+
+ memcpy (buf, valbuf, TYPE_LENGTH (type));
+ regcache_cooked_write (regs, AARCH64_V0_REGNUM, buf);
+ }
else
{
/* For a structure or union the behaviour is as if the value had
enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch);
uint32_t insn = read_memory_unsigned_integer (from, 4, byte_order_for_code);
struct aarch64_displaced_step_data dsd;
+ aarch64_inst inst;
+
+ if (aarch64_decode_insn (insn, &inst, 1) != 0)
+ return NULL;
/* Look for a Load Exclusive instruction which begins the sequence. */
- if (decode_masked_match (insn, 0x3fc00000, 0x08400000))
+ if (inst.opcode->iclass == ldstexcl && bit (insn, 22))
{
/* We can't displaced step atomic sequences. */
return NULL;
else
{
for (sindex = 0; sindex < selem; sindex++)
- if (bit (aarch64_insn_r->aarch64_insn, 22))
- record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM;
- else
- {
- record_buf_mem[mem_index++] = esize / 8;
- record_buf_mem[mem_index++] = address + addr_offset;
- }
- addr_offset = addr_offset + (esize / 8);
- reg_rt = (reg_rt + 1) % 32;
+ {
+ if (bit (aarch64_insn_r->aarch64_insn, 22))
+ record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM;
+ else
+ {
+ record_buf_mem[mem_index++] = esize / 8;
+ record_buf_mem[mem_index++] = address + addr_offset;
+ }
+ addr_offset = addr_offset + (esize / 8);
+ reg_rt = (reg_rt + 1) % 32;
+ }
}
}
/* Load/store multiple structure. */
projects / deliverable / binutils-gdb.git / blobdiff