/* Target-dependent code for Atmel AVR, for GDB.
- Copyright (C) 1996-2013 Free Software Foundation, Inc.
+ Copyright (C) 1996-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "symfile.h"
#include "arch-utils.h"
#include "regcache.h"
-#include <string.h>
#include "dis-asm.h"
+#include "objfiles.h"
+#include <algorithm>
/* AVR Background:
/* Constants: prefixed with AVR_ to avoid name space clashes */
+/* Address space flags */
+
+/* We are assigning the TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1 to the flash address
+ space. */
+
+#define AVR_TYPE_ADDRESS_CLASS_FLASH TYPE_ADDRESS_CLASS_1
+#define AVR_TYPE_INSTANCE_FLAG_ADDRESS_CLASS_FLASH \
+ TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1
+
+
enum
{
AVR_REG_W = 24,
AVR_ARG1_REGNUM = 24, /* Single byte argument */
AVR_ARGN_REGNUM = 25, /* Multi byte argments */
+ AVR_LAST_ARG_REGNUM = 8, /* Last argument register */
AVR_RET1_REGNUM = 24, /* Single byte return value */
AVR_RETN_REGNUM = 25, /* Multi byte return value */
struct gdbarch_tdep
{
/* Number of bytes stored to the stack by call instructions.
- 2 bytes for avr1-5, 3 bytes for avr6. */
+ 2 bytes for avr1-5 and avrxmega1-5, 3 bytes for avr6 and avrxmega6-7. */
int call_length;
/* Type for void. */
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ /* Is it a data address in flash? */
+ if (AVR_TYPE_ADDRESS_CLASS_FLASH (type))
+ {
+ /* A data pointer in flash is byte addressed. */
+ store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order,
+ avr_convert_iaddr_to_raw (addr));
+ }
/* Is it a code address? */
- if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
- || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD)
+ else if (TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_FUNC
+ || TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_METHOD)
{
+ /* A code pointer is word (16 bits) addressed. We shift the address down
+ by 1 bit to convert it to a pointer. */
store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order,
avr_convert_iaddr_to_raw (addr >> 1));
}
CORE_ADDR addr
= extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
+ /* Is it a data address in flash? */
+ if (AVR_TYPE_ADDRESS_CLASS_FLASH (type))
+ {
+ /* A data pointer in flash is already byte addressed. */
+ return avr_make_iaddr (addr);
+ }
/* Is it a code address? */
- if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
- || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD
- || TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)))
- return avr_make_iaddr (addr << 1);
+ else if (TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_FUNC
+ || TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_METHOD
+ || TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)))
+ {
+ /* A code pointer is word (16 bits) addressed so we shift it up
+ by 1 bit to convert it to an address. */
+ return avr_make_iaddr (addr << 1);
+ }
else
return avr_make_saddr (addr);
}
{
ULONGEST addr = unpack_long (type, buf);
- return avr_make_saddr (addr);
+ if (TYPE_DATA_SPACE (type))
+ return avr_make_saddr (addr);
+ else
+ return avr_make_iaddr (addr);
}
static CORE_ADDR
-avr_read_pc (struct regcache *regcache)
+avr_read_pc (readable_regcache *regcache)
{
ULONGEST pc;
- regcache_cooked_read_unsigned (regcache, AVR_PC_REGNUM, &pc);
+
+ regcache->cooked_read (AVR_PC_REGNUM, &pc);
return avr_make_iaddr (pc);
}
}
static enum register_status
-avr_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
+avr_pseudo_register_read (struct gdbarch *gdbarch, readable_regcache *regcache,
int regnum, gdb_byte *buf)
{
ULONGEST val;
switch (regnum)
{
case AVR_PSEUDO_PC_REGNUM:
- status = regcache_raw_read_unsigned (regcache, AVR_PC_REGNUM, &val);
+ status = regcache->raw_read (AVR_PC_REGNUM, &val);
if (status != REG_VALID)
return status;
val >>= 1;
int i;
unsigned short insn;
int scan_stage = 0;
- struct minimal_symbol *msymbol;
+ struct bound_minimal_symbol msymbol;
unsigned char prologue[AVR_MAX_PROLOGUE_SIZE];
int vpc = 0;
int len;
pc_offset += 2;
msymbol = lookup_minimal_symbol ("__prologue_saves__", NULL, NULL);
- if (!msymbol)
+ if (!msymbol.minsym)
break;
insn = extract_unsigned_integer (&prologue[vpc + 8], 2, byte_order);
/* Resolve offset (in words) from __prologue_saves__ symbol.
Which is a pushes count in `-mcall-prologues' mode */
- num_pushes = AVR_MAX_PUSHES - (i - SYMBOL_VALUE_ADDRESS (msymbol)) / 2;
+ num_pushes = AVR_MAX_PUSHES - (i - BMSYMBOL_VALUE_ADDRESS (msymbol)) / 2;
if (num_pushes > AVR_MAX_PUSHES)
{
info->size += gdbarch_tdep (gdbarch)->call_length;
vpc += 2;
}
- else if (insn == 0x920f) /* push r0 */
+ else if (insn == 0x920f || insn == 0x921f) /* push r0 or push r1 */
{
info->size += 1;
vpc += 2;
post_prologue_pc = skip_prologue_using_sal (gdbarch, func_addr);
if (post_prologue_pc != 0)
- return max (pc, post_prologue_pc);
+ return std::max (pc, post_prologue_pc);
{
CORE_ADDR prologue_end = pc;
it as a NOP. Thus, it should be ok. Since the avr is currently a remote
only target, this shouldn't be a problem (I hope). TRoth/2003-05-14 */
-static const unsigned char *
-avr_breakpoint_from_pc (struct gdbarch *gdbarch,
- CORE_ADDR *pcptr, int *lenptr)
-{
- static const unsigned char avr_break_insn [] = { 0x98, 0x95 };
- *lenptr = sizeof (avr_break_insn);
- return avr_break_insn;
-}
+constexpr gdb_byte avr_break_insn [] = { 0x98, 0x95 };
+
+typedef BP_MANIPULATION (avr_break_insn) avr_breakpoint;
/* Determine, for architecture GDBARCH, how a return value of TYPE
should be returned. If it is supposed to be returned in registers,
register holds the LSB. */
int lsb_reg;
- if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT
- || TYPE_CODE (valtype) == TYPE_CODE_UNION
- || TYPE_CODE (valtype) == TYPE_CODE_ARRAY)
+ if ((valtype->code () == TYPE_CODE_STRUCT
+ || valtype->code () == TYPE_CODE_UNION
+ || valtype->code () == TYPE_CODE_ARRAY)
&& TYPE_LENGTH (valtype) > 8)
return RETURN_VALUE_STRUCT_CONVENTION;
if (writebuf != NULL)
{
for (i = 0; i < TYPE_LENGTH (valtype); i++)
- regcache_cooked_write (regcache, lsb_reg + i, writebuf + i);
+ regcache->cooked_write (lsb_reg + i, writebuf + i);
}
if (readbuf != NULL)
{
for (i = 0; i < TYPE_LENGTH (valtype); i++)
- regcache_cooked_read (regcache, lsb_reg + i, readbuf + i);
+ regcache->cooked_read (lsb_reg + i, readbuf + i);
}
return RETURN_VALUE_REGISTER_CONVENTION;
int i;
if (*this_prologue_cache)
- return *this_prologue_cache;
+ return (struct avr_unwind_cache *) *this_prologue_cache;
info = FRAME_OBSTACK_ZALLOC (struct avr_unwind_cache);
*this_prologue_cache = info;
avr_frame_prev_register (struct frame_info *this_frame,
void **this_prologue_cache, int regnum)
{
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct avr_unwind_cache *info
= avr_frame_unwind_cache (this_frame, this_prologue_cache);
{
int len;
struct stack_item *prev;
- void *data;
+ gdb_byte *data;
};
static struct stack_item *
push_stack_item (struct stack_item *prev, const bfd_byte *contents, int len)
{
struct stack_item *si;
- si = xmalloc (sizeof (struct stack_item));
- si->data = xmalloc (len);
+ si = XNEW (struct stack_item);
+ si->data = (gdb_byte *) xmalloc (len);
si->len = len;
si->prev = prev;
memcpy (si->data, contents, len);
avr_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)
+ function_call_return_method return_method,
+ CORE_ADDR struct_addr)
{
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int i;
gdb_byte buf[3];
int call_length = gdbarch_tdep (gdbarch)->call_length;
int regnum = AVR_ARGN_REGNUM;
struct stack_item *si = NULL;
- if (struct_return)
+ if (return_method == return_method_struct)
{
regcache_cooked_write_unsigned
(regcache, regnum--, (struct_addr >> 8) & 0xff);
const bfd_byte *contents = value_contents (arg);
int len = TYPE_LENGTH (type);
- /* Calculate the potential last register needed. */
- last_regnum = regnum - (len + (len & 1));
+ /* Calculate the potential last register needed.
+ E.g. For length 2, registers regnum and regnum-1 (say 25 and 24)
+ shall be used. So, last needed register will be regnum-1(24). */
+ last_regnum = regnum - (len + (len & 1)) + 1;
/* If there are registers available, use them. Once we start putting
stuff on the stack, all subsequent args go on stack. */
- if ((si == NULL) && (last_regnum >= 8))
+ if ((si == NULL) && (last_regnum >= AVR_LAST_ARG_REGNUM))
{
- ULONGEST val;
-
/* Skip a register for odd length args. */
if (len & 1)
regnum--;
- val = extract_unsigned_integer (contents, len, byte_order);
+ /* Write MSB of argument into register and subsequent bytes in
+ decreasing register numbers. */
for (j = 0; j < len; j++)
regcache_cooked_write_unsigned
- (regcache, regnum--, val >> (8 * (len - j - 1)));
+ (regcache, regnum--, contents[len - j - 1]);
}
/* No registers available, push the args onto the stack. */
else
return reg;
if (reg == 32)
return AVR_SP_REGNUM;
+ return -1;
+}
- warning (_("Unmapped DWARF Register #%d encountered."), reg);
+/* Implementation of `address_class_type_flags' gdbarch method.
- return -1;
+ This method maps DW_AT_address_class attributes to a
+ type_instance_flag_value. */
+
+static int
+avr_address_class_type_flags (int byte_size, int dwarf2_addr_class)
+{
+ /* The value 1 of the DW_AT_address_class attribute corresponds to the
+ __flash qualifier. Note that this attribute is only valid with
+ pointer types and therefore the flag is set to the pointer type and
+ not its target type. */
+ if (dwarf2_addr_class == 1 && byte_size == 2)
+ return AVR_TYPE_INSTANCE_FLAG_ADDRESS_CLASS_FLASH;
+ return 0;
+}
+
+/* Implementation of `address_class_type_flags_to_name' gdbarch method.
+
+ Convert a type_instance_flag_value to an address space qualifier. */
+
+static const char*
+avr_address_class_type_flags_to_name (struct gdbarch *gdbarch, int type_flags)
+{
+ if (type_flags & AVR_TYPE_INSTANCE_FLAG_ADDRESS_CLASS_FLASH)
+ return "flash";
+ else
+ return NULL;
+}
+
+/* Implementation of `address_class_name_to_type_flags' gdbarch method.
+
+ Convert an address space qualifier to a type_instance_flag_value. */
+
+static int
+avr_address_class_name_to_type_flags (struct gdbarch *gdbarch,
+ const char* name,
+ int *type_flags_ptr)
+{
+ if (strcmp (name, "flash") == 0)
+ {
+ *type_flags_ptr = AVR_TYPE_INSTANCE_FLAG_ADDRESS_CLASS_FLASH;
+ return 1;
+ }
+ else
+ return 0;
}
/* Initialize the gdbarch structure for the AVR's. */
switch (info.bfd_arch_info->mach)
{
case bfd_mach_avr1:
+ case bfd_mach_avrxmega1:
case bfd_mach_avr2:
+ case bfd_mach_avrxmega2:
case bfd_mach_avr3:
+ case bfd_mach_avrxmega3:
case bfd_mach_avr4:
+ case bfd_mach_avrxmega4:
case bfd_mach_avr5:
+ case bfd_mach_avrxmega5:
default:
call_length = 2;
break;
case bfd_mach_avr6:
+ case bfd_mach_avrxmega6:
+ case bfd_mach_avrxmega7:
call_length = 3;
break;
}
}
/* None found, create a new architecture from the information provided. */
- tdep = XMALLOC (struct gdbarch_tdep);
+ tdep = XCNEW (struct gdbarch_tdep);
gdbarch = gdbarch_alloc (&info, tdep);
tdep->call_length = call_length;
/* Create a type for PC. We can't use builtin types here, as they may not
be defined. */
- tdep->void_type = arch_type (gdbarch, TYPE_CODE_VOID, 1, "void");
+ tdep->void_type = arch_type (gdbarch, TYPE_CODE_VOID, TARGET_CHAR_BIT,
+ "void");
tdep->func_void_type = make_function_type (tdep->void_type, NULL);
- tdep->pc_type = arch_type (gdbarch, TYPE_CODE_PTR, 4, NULL);
- TYPE_TARGET_TYPE (tdep->pc_type) = tdep->func_void_type;
- TYPE_UNSIGNED (tdep->pc_type) = 1;
+ tdep->pc_type = arch_pointer_type (gdbarch, 4 * TARGET_CHAR_BIT, NULL,
+ tdep->func_void_type);
set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT);
set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT);
set_gdbarch_addr_bit (gdbarch, 32);
+ set_gdbarch_wchar_bit (gdbarch, 2 * TARGET_CHAR_BIT);
+ set_gdbarch_wchar_signed (gdbarch, 1);
+
set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_long_double_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_pseudo_register_write (gdbarch, avr_pseudo_register_write);
set_gdbarch_return_value (gdbarch, avr_return_value);
- set_gdbarch_print_insn (gdbarch, print_insn_avr);
set_gdbarch_push_dummy_call (gdbarch, avr_push_dummy_call);
set_gdbarch_skip_prologue (gdbarch, avr_skip_prologue);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- set_gdbarch_breakpoint_from_pc (gdbarch, avr_breakpoint_from_pc);
+ set_gdbarch_breakpoint_kind_from_pc (gdbarch, avr_breakpoint::kind_from_pc);
+ set_gdbarch_sw_breakpoint_from_kind (gdbarch, avr_breakpoint::bp_from_kind);
frame_unwind_append_unwinder (gdbarch, &avr_frame_unwind);
frame_base_set_default (gdbarch, &avr_frame_base);
set_gdbarch_unwind_pc (gdbarch, avr_unwind_pc);
set_gdbarch_unwind_sp (gdbarch, avr_unwind_sp);
+ set_gdbarch_address_class_type_flags (gdbarch, avr_address_class_type_flags);
+ set_gdbarch_address_class_name_to_type_flags
+ (gdbarch, avr_address_class_name_to_type_flags);
+ set_gdbarch_address_class_type_flags_to_name
+ (gdbarch, avr_address_class_type_flags_to_name);
+
return gdbarch;
}
All io registers are 8-bit. */
static void
-avr_io_reg_read_command (char *args, int from_tty)
+avr_io_reg_read_command (const char *args, int from_tty)
{
- LONGEST bufsiz = 0;
- gdb_byte *buf;
- const char *bufstr;
char query[400];
- const char *p;
unsigned int nreg = 0;
unsigned int val;
- int i, j, k, step;
/* Find out how many io registers the target has. */
- bufsiz = target_read_alloc (¤t_target, TARGET_OBJECT_AVR,
- "avr.io_reg", &buf);
- bufstr = (const char *) buf;
+ gdb::optional<gdb::byte_vector> buf
+ = target_read_alloc (current_top_target (), TARGET_OBJECT_AVR, "avr.io_reg");
- if (bufsiz <= 0)
+ if (!buf)
{
fprintf_unfiltered (gdb_stderr,
_("ERR: info io_registers NOT supported "
return;
}
+ const char *bufstr = (const char *) buf->data ();
+
if (sscanf (bufstr, "%x", &nreg) != 1)
{
fprintf_unfiltered (gdb_stderr,
_("Error fetching number of io registers\n"));
- xfree (buf);
return;
}
- xfree (buf);
-
reinitialize_more_filter ();
printf_unfiltered (_("Target has %u io registers:\n\n"), nreg);
/* only fetch up to 8 registers at a time to keep the buffer small */
- step = 8;
+ int step = 8;
- for (i = 0; i < nreg; i += step)
+ for (int i = 0; i < nreg; i += step)
{
/* how many registers this round? */
- j = step;
+ int j = step;
if ((i+j) >= nreg)
j = nreg - i; /* last block is less than 8 registers */
snprintf (query, sizeof (query) - 1, "avr.io_reg:%x,%x", i, j);
- bufsiz = target_read_alloc (¤t_target, TARGET_OBJECT_AVR,
- query, &buf);
+ buf = target_read_alloc (current_top_target (), TARGET_OBJECT_AVR, query);
+
+ if (!buf)
+ {
+ fprintf_unfiltered (gdb_stderr,
+ _("ERR: error reading avr.io_reg:%x,%x\n"),
+ i, j);
+ return;
+ }
- p = (const char *) buf;
- for (k = i; k < (i + j); k++)
+ const char *p = (const char *) buf->data ();
+ for (int k = i; k < (i + j); k++)
{
if (sscanf (p, "%[^,],%x;", query, &val) == 2)
{
break;
}
}
-
- xfree (buf);
}
}
-extern initialize_file_ftype _initialize_avr_tdep; /* -Wmissing-prototypes */
-
+void _initialize_avr_tdep ();
void
-_initialize_avr_tdep (void)
+_initialize_avr_tdep ()
{
register_gdbarch_init (bfd_arch_avr, avr_gdbarch_init);
/* FIXME: TRoth/2002-02-18: This should probably be changed to 'info avr
io_registers' to signify it is not available on other platforms. */
- add_cmd ("io_registers", class_info, avr_io_reg_read_command,
- _("query remote avr target for io space register values"),
- &infolist);
+ add_info ("io_registers", avr_io_reg_read_command,
+ _("Query remote AVR target for I/O space register values."));
}
projects / deliverable / binutils-gdb.git / blobdiff