/* Target-dependent code for the IQ2000 architecture, for GDB, the GNU
Debugger.
- Copyright (C) 2000-2016 Free Software Foundation, Inc.
+ Copyright (C) 2000-2021 Free Software Foundation, Inc.
Contributed by Red Hat.
#include "frame.h"
#include "frame-base.h"
#include "frame-unwind.h"
-#include "dwarf2-frame.h"
+#include "dwarf2/frame.h"
#include "gdbtypes.h"
#include "value.h"
#include "dis-asm.h"
struct type * type, const gdb_byte * buf)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type));
+ enum type_code target = TYPE_TARGET_TYPE (type)->code ();
CORE_ADDR addr
= extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
struct type *type, gdb_byte *buf, CORE_ADDR addr)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type));
+ enum type_code target = TYPE_TARGET_TYPE (type)->code ();
if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD)
addr = insn_ptr_from_addr (addr);
struct symtab_and_line sal;
CORE_ADDR pc;
CORE_ADDR loop_end;
- int found_store_lr = 0;
- int found_decr_sp = 0;
int srcreg;
int tgtreg;
signed short offset;
{
LONGEST insn = read_memory_unsigned_integer (pc, 4, byte_order);
/* Skip any instructions writing to (sp) or decrementing the
- SP. */
+ SP. */
if ((insn & 0xffe00000) == 0xac200000)
{
/* sw using SP/%1 as base. */
if (tgtreg >= 0 && tgtreg < E_NUM_REGS)
cache->saved_regs[tgtreg] = -((signed short) (insn & 0xffff));
- if (tgtreg == E_LR_REGNUM)
- found_store_lr = 1;
continue;
}
{
/* addi %1, %1, -N == addi %sp, %sp, -N */
/* LEGACY -- from assembly-only port. */
- found_decr_sp = 1;
cache->framesize = -((signed short) (insn & 0xffff));
continue;
}
}
/* Unknown instruction encountered in frame. Bail out?
- 1) If we have a subsequent line symbol, we can keep going.
- 2) If not, we need to bail out and quit scanning instructions. */
+ 1) If we have a subsequent line symbol, we can keep going.
+ 2) If not, we need to bail out and quit scanning instructions. */
if (fi && sal.end && (pc < sal.end)) /* Keep scanning. */
continue;
if (regnum < E_NUM_REGS && cache->saved_regs[regnum] != -1)
return frame_unwind_got_memory (this_frame, regnum,
- cache->saved_regs[regnum]);
+ cache->saved_regs[regnum]);
return frame_unwind_got_register (this_frame, regnum, regnum);
}
}
static const struct frame_unwind iq2000_frame_unwind = {
+ "iq2000 prologue",
NORMAL_FRAME,
default_frame_unwind_stop_reason,
iq2000_frame_this_id,
default_frame_sniffer
};
-static CORE_ADDR
-iq2000_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
- return frame_unwind_register_unsigned (next_frame, E_SP_REGNUM);
-}
-
-static CORE_ADDR
-iq2000_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
- return frame_unwind_register_unsigned (next_frame, E_PC_REGNUM);
-}
-
-static struct frame_id
-iq2000_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
- CORE_ADDR sp = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
- return frame_id_build (sp, get_frame_pc (this_frame));
-}
-
static CORE_ADDR
iq2000_frame_base_address (struct frame_info *this_frame, void **this_cache)
{
iq2000_frame_base_address
};
-static const unsigned char *
-iq2000_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
- int *lenptr)
+static int
+iq2000_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
{
- static const unsigned char big_breakpoint[] = { 0x00, 0x00, 0x00, 0x0d };
- static const unsigned char little_breakpoint[] = { 0x0d, 0x00, 0x00, 0x00 };
-
if ((*pcptr & 3) != 0)
error (_("breakpoint_from_pc: invalid breakpoint address 0x%lx"),
(long) *pcptr);
- *lenptr = 4;
+ return 4;
+}
+
+static const gdb_byte *
+iq2000_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size)
+{
+ static const unsigned char big_breakpoint[] = { 0x00, 0x00, 0x00, 0x0d };
+ static const unsigned char little_breakpoint[] = { 0x0d, 0x00, 0x00, 0x00 };
+ *size = kind;
+
return (gdbarch_byte_order (gdbarch)
== BFD_ENDIAN_BIG) ? big_breakpoint : little_breakpoint;
}
memset (buf, 0, 4);
memcpy (buf + 4 - size, valbuf, size);
- regcache_raw_write (regcache, regno++, buf);
+ regcache->raw_write (regno++, buf);
len -= size;
valbuf = ((char *) valbuf) + size;
}
static int
iq2000_use_struct_convention (struct type *type)
{
- return ((TYPE_CODE (type) == TYPE_CODE_STRUCT)
- || (TYPE_CODE (type) == TYPE_CODE_UNION))
+ return ((type->code () == TYPE_CODE_STRUCT)
+ || (type->code () == TYPE_CODE_UNION))
&& TYPE_LENGTH (type) > 8;
}
iq2000_extract_return_value (struct type *type, struct regcache *regcache,
gdb_byte *valbuf)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* If the function's return value is 8 bytes or less, it is
struct type *ftype;
/* Skip typedefs. */
- while (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
+ while (type->code () == TYPE_CODE_TYPEDEF)
type = TYPE_TARGET_TYPE (type);
/* Non-struct and non-union types are always passed by value. */
- if (TYPE_CODE (type) != TYPE_CODE_STRUCT
- && TYPE_CODE (type) != TYPE_CODE_UNION)
+ if (type->code () != TYPE_CODE_STRUCT
+ && type->code () != TYPE_CODE_UNION)
return 0;
/* Structs with more than 1 field are always passed by address. */
- if (TYPE_NFIELDS (type) != 1)
+ if (type->num_fields () != 1)
return 1;
/* Get field type. */
- ftype = (TYPE_FIELDS (type))[0].type;
+ ftype = type->field (0).type ();
/* The field type must have size 8, otherwise pass by address. */
if (TYPE_LENGTH (ftype) != 8)
return 1;
/* Skip typedefs of field type. */
- while (TYPE_CODE (ftype) == TYPE_CODE_TYPEDEF)
+ while (ftype->code () == TYPE_CODE_TYPEDEF)
ftype = TYPE_TARGET_TYPE (ftype);
/* If field is int or float, pass by value. */
- if (TYPE_CODE (ftype) == TYPE_CODE_FLT
- || TYPE_CODE (ftype) == TYPE_CODE_INT)
+ if (ftype->code () == TYPE_CODE_FLT
+ || ftype->code () == TYPE_CODE_INT)
return 0;
/* Everything else, pass by address. */
return 1;
static CORE_ADDR
iq2000_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
- struct regcache *regcache, CORE_ADDR bp_addr,
- int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
+ struct regcache *regcache, CORE_ADDR bp_addr,
+ int nargs, struct value **args, CORE_ADDR sp,
+ function_call_return_method return_method,
+ CORE_ADDR struct_addr)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
const bfd_byte *val;
CORE_ADDR struct_ptr;
/* First determine how much stack space we will need. */
- for (i = 0, argreg = E_1ST_ARGREG + (struct_return != 0); i < nargs; i++)
+ for (i = 0, argreg = E_1ST_ARGREG + (return_method == return_method_struct);
+ i < nargs;
+ i++)
{
type = value_type (args[i]);
typelen = TYPE_LENGTH (type);
if (typelen <= 4)
- {
- /* Scalars of up to 4 bytes,
- structs of up to 4 bytes, and
- pointers. */
- if (argreg <= E_LAST_ARGREG)
- argreg++;
- else
- stackspace += 4;
- }
+ {
+ /* Scalars of up to 4 bytes,
+ structs of up to 4 bytes, and
+ pointers. */
+ if (argreg <= E_LAST_ARGREG)
+ argreg++;
+ else
+ stackspace += 4;
+ }
else if (typelen == 8 && !iq2000_pass_8bytetype_by_address (type))
- {
- /* long long,
- double, and possibly
- structs with a single field of long long or double. */
- if (argreg <= E_LAST_ARGREG - 1)
- {
- /* 8-byte arg goes into a register pair
- (must start with an even-numbered reg). */
- if (((argreg - E_1ST_ARGREG) % 2) != 0)
- argreg ++;
- argreg += 2;
- }
- else
- {
- argreg = E_LAST_ARGREG + 1; /* no more argregs. */
- /* 8-byte arg goes on stack, must be 8-byte aligned. */
- stackspace = ((stackspace + 7) & ~7);
- stackspace += 8;
- }
- }
+ {
+ /* long long,
+ double, and possibly
+ structs with a single field of long long or double. */
+ if (argreg <= E_LAST_ARGREG - 1)
+ {
+ /* 8-byte arg goes into a register pair
+ (must start with an even-numbered reg). */
+ if (((argreg - E_1ST_ARGREG) % 2) != 0)
+ argreg ++;
+ argreg += 2;
+ }
+ else
+ {
+ argreg = E_LAST_ARGREG + 1; /* no more argregs. */
+ /* 8-byte arg goes on stack, must be 8-byte aligned. */
+ stackspace = ((stackspace + 7) & ~7);
+ stackspace += 8;
+ }
+ }
else
{
/* Structs are passed as pointer to a copy of the struct.
So we need room on the stack for a copy of the struct
plus for the argument pointer. */
- if (argreg <= E_LAST_ARGREG)
- argreg++;
- else
- stackspace += 4;
+ if (argreg <= E_LAST_ARGREG)
+ argreg++;
+ else
+ stackspace += 4;
/* Care for 8-byte alignment of structs saved on stack. */
stackspace += ((typelen + 7) & ~7);
}
stackspace = 0;
argreg = E_1ST_ARGREG;
- if (struct_return)
+ if (return_method == return_method_struct)
{
/* A function that returns a struct will consume one argreg to do so.
*/
typelen = TYPE_LENGTH (type);
val = value_contents (args[i]);
if (typelen <= 4)
- {
- /* Char, short, int, float, pointer, and structs <= four bytes. */
+ {
+ /* Char, short, int, float, pointer, and structs <= four bytes. */
slacklen = (4 - (typelen % 4)) % 4;
memset (buf, 0, sizeof (buf));
memcpy (buf + slacklen, val, typelen);
- if (argreg <= E_LAST_ARGREG)
- {
- /* Passed in a register. */
- regcache_raw_write (regcache, argreg++, buf);
- }
- else
- {
- /* Passed on the stack. */
- write_memory (sp + stackspace, buf, 4);
- stackspace += 4;
- }
- }
+ if (argreg <= E_LAST_ARGREG)
+ {
+ /* Passed in a register. */
+ regcache->raw_write (argreg++, buf);
+ }
+ else
+ {
+ /* Passed on the stack. */
+ write_memory (sp + stackspace, buf, 4);
+ stackspace += 4;
+ }
+ }
else if (typelen == 8 && !iq2000_pass_8bytetype_by_address (type))
- {
- /* (long long), (double), or struct consisting of
- a single (long long) or (double). */
- if (argreg <= E_LAST_ARGREG - 1)
- {
- /* 8-byte arg goes into a register pair
- (must start with an even-numbered reg). */
- if (((argreg - E_1ST_ARGREG) % 2) != 0)
- argreg++;
- regcache_raw_write (regcache, argreg++, val);
- regcache_raw_write (regcache, argreg++, val + 4);
- }
- else
- {
- /* 8-byte arg goes on stack, must be 8-byte aligned. */
- argreg = E_LAST_ARGREG + 1; /* no more argregs. */
- stackspace = ((stackspace + 7) & ~7);
- write_memory (sp + stackspace, val, typelen);
- stackspace += 8;
- }
- }
+ {
+ /* (long long), (double), or struct consisting of
+ a single (long long) or (double). */
+ if (argreg <= E_LAST_ARGREG - 1)
+ {
+ /* 8-byte arg goes into a register pair
+ (must start with an even-numbered reg). */
+ if (((argreg - E_1ST_ARGREG) % 2) != 0)
+ argreg++;
+ regcache->raw_write (argreg++, val);
+ regcache->raw_write (argreg++, val + 4);
+ }
+ else
+ {
+ /* 8-byte arg goes on stack, must be 8-byte aligned. */
+ argreg = E_LAST_ARGREG + 1; /* no more argregs. */
+ stackspace = ((stackspace + 7) & ~7);
+ write_memory (sp + stackspace, val, typelen);
+ stackspace += 8;
+ }
+ }
else
- {
+ {
/* Store struct beginning at the upper end of the previously
computed stack space. Then store the address of the struct
using the usual rules for a 4 byte value. */
write_memory (sp + stackspace, buf, 4);
stackspace += 4;
}
- }
+ }
}
/* Store return address. */
set_gdbarch_double_format (gdbarch, floatformats_ieee_double);
set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
set_gdbarch_return_value (gdbarch, iq2000_return_value);
- set_gdbarch_breakpoint_from_pc (gdbarch, iq2000_breakpoint_from_pc);
+ set_gdbarch_breakpoint_kind_from_pc (gdbarch,
+ iq2000_breakpoint_kind_from_pc);
+ set_gdbarch_sw_breakpoint_from_kind (gdbarch,
+ iq2000_sw_breakpoint_from_kind);
set_gdbarch_frame_args_skip (gdbarch, 0);
set_gdbarch_skip_prologue (gdbarch, iq2000_skip_prologue);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- set_gdbarch_print_insn (gdbarch, print_insn_iq2000);
set_gdbarch_register_type (gdbarch, iq2000_register_type);
set_gdbarch_frame_align (gdbarch, iq2000_frame_align);
- set_gdbarch_unwind_sp (gdbarch, iq2000_unwind_sp);
- set_gdbarch_unwind_pc (gdbarch, iq2000_unwind_pc);
- set_gdbarch_dummy_id (gdbarch, iq2000_dummy_id);
frame_base_set_default (gdbarch, &iq2000_frame_base);
set_gdbarch_push_dummy_call (gdbarch, iq2000_push_dummy_call);
Initializer function for the iq2000 module.
Called by gdb at start-up. */
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern initialize_file_ftype _initialize_iq2000_tdep;
-
+void _initialize_iq2000_tdep ();
void
-_initialize_iq2000_tdep (void)
+_initialize_iq2000_tdep ()
{
register_gdbarch_init (bfd_arch_iq2000, iq2000_gdbarch_init);
}