/* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
- Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
- Foundation, Inc.
+ Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free
+ Software Foundation, Inc.
This file is part of GDB.
#include "bfd.h"
#include "gdb_string.h"
#include "gdbcore.h"
-#include "symfile.h"
+#include "objfiles.h"
#include "regcache.h"
#include "arch-utils.h"
#include "gdb_assert.h"
}
static void
-mn10300_extract_return_value (struct type *type, char *regbuf, char *valbuf)
+mn10300_extract_return_value (struct gdbarch *gdbarch, struct type *type,
+ struct regcache *regcache, void *valbuf)
{
+ char buf[MAX_REGISTER_SIZE];
+ int len = TYPE_LENGTH (type);
+ int reg, regsz;
+
if (TYPE_CODE (type) == TYPE_CODE_PTR)
- memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (4), TYPE_LENGTH (type));
+ reg = 4;
else
- memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (0), TYPE_LENGTH (type));
-}
+ reg = 0;
-static CORE_ADDR
-mn10300_extract_struct_value_address (char *regbuf)
-{
- return extract_unsigned_integer (regbuf + DEPRECATED_REGISTER_BYTE (4),
- REGISTER_RAW_SIZE (4));
+ regsz = register_size (gdbarch, reg);
+ if (len <= regsz)
+ {
+ regcache_raw_read (regcache, reg, buf);
+ memcpy (valbuf, buf, len);
+ }
+ else if (len <= 2 * regsz)
+ {
+ regcache_raw_read (regcache, reg, buf);
+ memcpy (valbuf, buf, regsz);
+ gdb_assert (regsz == register_size (gdbarch, reg + 1));
+ regcache_raw_read (regcache, reg + 1, buf);
+ memcpy ((char *) valbuf + regsz, buf, len - regsz);
+ }
+ else
+ internal_error (__FILE__, __LINE__,
+ "Cannot extract return value %d bytes long.", len);
}
static void
-mn10300_store_return_value (struct type *type, char *valbuf)
+mn10300_store_return_value (struct gdbarch *gdbarch, struct type *type,
+ struct regcache *regcache, const void *valbuf)
{
+ int len = TYPE_LENGTH (type);
+ int reg, regsz;
+
if (TYPE_CODE (type) == TYPE_CODE_PTR)
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (4), valbuf,
- TYPE_LENGTH (type));
+ reg = 4;
else
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (0), valbuf,
- TYPE_LENGTH (type));
+ reg = 0;
+
+ regsz = register_size (gdbarch, reg);
+
+ if (len <= regsz)
+ regcache_raw_write_part (regcache, reg, 0, len, valbuf);
+ else if (len <= 2 * regsz)
+ {
+ regcache_raw_write (regcache, reg, valbuf);
+ gdb_assert (regsz == register_size (gdbarch, reg + 1));
+ regcache_raw_write_part (regcache, reg+1, 0,
+ len - regsz, (char *) valbuf + regsz);
+ }
+ else
+ internal_error (__FILE__, __LINE__,
+ "Cannot store return value %d bytes long.", len);
}
static struct frame_info *analyze_dummy_frame (CORE_ADDR, CORE_ADDR);
static struct frame_info *
analyze_dummy_frame (CORE_ADDR pc, CORE_ADDR frame)
{
- static struct frame_info *dummy = NULL;
- if (dummy == NULL)
- {
- struct frame_extra_info *extra_info;
- CORE_ADDR *saved_regs;
- dummy = deprecated_frame_xmalloc ();
- saved_regs = xmalloc (SIZEOF_FRAME_SAVED_REGS);
- deprecated_set_frame_saved_regs_hack (dummy, saved_regs);
- extra_info = XMALLOC (struct frame_extra_info);
- deprecated_set_frame_extra_info_hack (dummy, extra_info);
- }
- deprecated_set_frame_next_hack (dummy, NULL);
- deprecated_set_frame_prev_hack (dummy, NULL);
+ struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
+ struct frame_info *dummy
+ = deprecated_frame_xmalloc_with_cleanup (SIZEOF_FRAME_SAVED_REGS,
+ sizeof (struct frame_extra_info));
deprecated_update_frame_pc_hack (dummy, pc);
deprecated_update_frame_base_hack (dummy, frame);
get_frame_extra_info (dummy)->status = 0;
get_frame_extra_info (dummy)->stack_size = 0;
- memset (deprecated_get_frame_saved_regs (dummy), '\000', SIZEOF_FRAME_SAVED_REGS);
mn10300_analyze_prologue (dummy, pc);
+ do_cleanups (old_chain);
return dummy;
}
#define MY_FRAME_IN_FP 0x2
#define NO_MORE_FRAMES 0x4
+/* Compute the alignment required by a type. */
+
+static int
+mn10300_type_align (struct type *type)
+{
+ int i, align = 1;
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_INT:
+ case TYPE_CODE_ENUM:
+ case TYPE_CODE_SET:
+ case TYPE_CODE_RANGE:
+ case TYPE_CODE_CHAR:
+ case TYPE_CODE_BOOL:
+ case TYPE_CODE_FLT:
+ case TYPE_CODE_PTR:
+ case TYPE_CODE_REF:
+ return TYPE_LENGTH (type);
+
+ case TYPE_CODE_COMPLEX:
+ return TYPE_LENGTH (type) / 2;
+
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ for (i = 0; i < TYPE_NFIELDS (type); i++)
+ {
+ int falign = mn10300_type_align (TYPE_FIELD_TYPE (type, i));
+ while (align < falign)
+ align <<= 1;
+ }
+ return align;
+
+ case TYPE_CODE_ARRAY:
+ /* HACK! Structures containing arrays, even small ones, are not
+ elligible for returning in registers. */
+ return 256;
+
+ case TYPE_CODE_TYPEDEF:
+ return mn10300_type_align (check_typedef (type));
+
+ default:
+ internal_error (__FILE__, __LINE__, "bad switch");
+ }
+}
/* Should call_function allocate stack space for a struct return? */
static int
-mn10300_use_struct_convention (int gcc_p, struct type *type)
+mn10300_use_struct_convention (struct type *type)
+{
+ /* Structures bigger than a pair of words can't be returned in
+ registers. */
+ if (TYPE_LENGTH (type) > 8)
+ return 1;
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ /* Structures with a single field are handled as the field
+ itself. */
+ if (TYPE_NFIELDS (type) == 1)
+ return mn10300_use_struct_convention (TYPE_FIELD_TYPE (type, 0));
+
+ /* Structures with word or double-word size are passed in memory, as
+ long as they require at least word alignment. */
+ if (mn10300_type_align (type) >= 4)
+ return 0;
+
+ return 1;
+
+ /* Arrays are addressable, so they're never returned in
+ registers. This condition can only hold when the array is
+ the only field of a struct or union. */
+ case TYPE_CODE_ARRAY:
+ return 1;
+
+ case TYPE_CODE_TYPEDEF:
+ return mn10300_use_struct_convention (check_typedef (type));
+
+ default:
+ return 0;
+ }
+}
+
+/* Determine, for architecture GDBARCH, how a return value of TYPE
+ should be returned. If it is supposed to be returned in registers,
+ and READBUF is non-zero, read the appropriate value from REGCACHE,
+ and copy it into READBUF. If WRITEBUF is non-zero, write the value
+ from WRITEBUF into REGCACHE. */
+
+static enum return_value_convention
+mn10300_return_value (struct gdbarch *gdbarch, struct type *type,
+ struct regcache *regcache, void *readbuf,
+ const void *writebuf)
{
- return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 8);
+ if (mn10300_use_struct_convention (type))
+ return RETURN_VALUE_STRUCT_CONVENTION;
+
+ if (readbuf)
+ mn10300_extract_return_value (gdbarch, type, regcache, readbuf);
+ if (writebuf)
+ mn10300_store_return_value (gdbarch, type, regcache, writebuf);
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
}
/* The breakpoint instruction must be the same size as the smallest
addr = func_addr;
/* Suck in two bytes. */
- status = read_memory_nobpt (addr, buf, 2);
- if (status != 0)
+ if (addr + 2 >= stop
+ || (status = read_memory_nobpt (addr, buf, 2)) != 0)
{
fix_frame_pointer (fi, 0);
return addr;
ULONGEST value;
value = read_memory_unsigned_integer (deprecated_get_frame_saved_regs (frame)[regnum],
- REGISTER_RAW_SIZE (regnum));
+ DEPRECATED_REGISTER_RAW_SIZE (regnum));
write_register (regnum, value);
}
- /* Actually cut back the stack. */
- write_register (SP_REGNUM, get_frame_base (frame));
-
- /* Don't we need to set the PC?!? XXX FIXME. */
+ /* Actually cut back the stack, adjusted by the saved registers like
+ ret would. */
+ write_register (SP_REGNUM, get_frame_base (frame) + saved_regs_size (frame));
}
/* Function: pop_frame
static void
mn10300_pop_frame (void)
{
- /* This function checks for and handles generic dummy frames, and
- calls back to our function for ordinary frames. */
- generic_pop_current_frame (mn10300_pop_frame_regular);
-
+ struct frame_info *frame = get_current_frame ();
+ if (get_frame_type (frame) == DUMMY_FRAME)
+ /* NOTE: cagney/2002-22-23: Does this ever occure? Surely a dummy
+ frame will have already been poped by the "infrun.c" code. */
+ deprecated_pop_dummy_frame ();
+ else
+ mn10300_pop_frame_regular (frame);
/* Throw away any cached frame information. */
flush_cached_frames ();
}
int byte;
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
{
- for (byte = REGISTER_RAW_SIZE (regnum) - REGISTER_VIRTUAL_SIZE (regnum);
- byte < REGISTER_RAW_SIZE (regnum);
+ for (byte = DEPRECATED_REGISTER_RAW_SIZE (regnum) - DEPRECATED_REGISTER_VIRTUAL_SIZE (regnum);
+ byte < DEPRECATED_REGISTER_RAW_SIZE (regnum);
byte++)
printf_filtered ("%02x", (unsigned char) raw_buffer[byte]);
}
else
{
- for (byte = REGISTER_VIRTUAL_SIZE (regnum) - 1;
+ for (byte = DEPRECATED_REGISTER_VIRTUAL_SIZE (regnum) - 1;
byte >= 0;
byte--)
printf_filtered ("%02x", (unsigned char) raw_buffer[byte]);
mn10300_gdbarch_init (struct gdbarch_info info,
struct gdbarch_list *arches)
{
- static LONGEST mn10300_call_dummy_words[] = { 0 };
struct gdbarch *gdbarch;
struct gdbarch_tdep *tdep = NULL;
int am33_mode;
set_gdbarch_register_name (gdbarch, register_name);
set_gdbarch_deprecated_register_size (gdbarch, 4);
set_gdbarch_deprecated_register_bytes (gdbarch, num_regs * gdbarch_deprecated_register_size (gdbarch));
- set_gdbarch_deprecated_max_register_raw_size (gdbarch, 4);
set_gdbarch_deprecated_register_raw_size (gdbarch, mn10300_register_raw_size);
set_gdbarch_deprecated_register_byte (gdbarch, mn10300_register_byte);
- set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 4);
set_gdbarch_deprecated_register_virtual_size (gdbarch, mn10300_register_virtual_size);
set_gdbarch_deprecated_register_virtual_type (gdbarch, mn10300_register_virtual_type);
set_gdbarch_dwarf2_reg_to_regnum (gdbarch, mn10300_dwarf2_reg_to_regnum);
/* Breakpoints. */
set_gdbarch_breakpoint_from_pc (gdbarch, mn10300_breakpoint_from_pc);
- set_gdbarch_function_start_offset (gdbarch, 0);
- set_gdbarch_decr_pc_after_break (gdbarch, 0);
/* Stack unwinding. */
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, mn10300_frame_init_saved_regs);
set_gdbarch_deprecated_frame_chain (gdbarch, mn10300_frame_chain);
set_gdbarch_deprecated_frame_saved_pc (gdbarch, mn10300_frame_saved_pc);
- set_gdbarch_deprecated_extract_return_value (gdbarch, mn10300_extract_return_value);
- set_gdbarch_deprecated_extract_struct_value_address
- (gdbarch, mn10300_extract_struct_value_address);
- set_gdbarch_deprecated_store_return_value (gdbarch, mn10300_store_return_value);
+ set_gdbarch_return_value (gdbarch, mn10300_return_value);
set_gdbarch_deprecated_store_struct_return (gdbarch, mn10300_store_struct_return);
set_gdbarch_deprecated_pop_frame (gdbarch, mn10300_pop_frame);
set_gdbarch_skip_prologue (gdbarch, mn10300_skip_prologue);
- set_gdbarch_frame_args_skip (gdbarch, 0);
/* That's right, we're using the stack pointer as our frame pointer. */
set_gdbarch_deprecated_target_read_fp (gdbarch, mn10300_read_fp);
/* Calling functions in the inferior from GDB. */
- set_gdbarch_deprecated_call_dummy_words (gdbarch, mn10300_call_dummy_words);
- set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, sizeof (mn10300_call_dummy_words));
- set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point);
set_gdbarch_deprecated_push_arguments (gdbarch, mn10300_push_arguments);
set_gdbarch_deprecated_reg_struct_has_addr
(gdbarch, mn10300_reg_struct_has_addr);
set_gdbarch_deprecated_push_return_address (gdbarch, mn10300_push_return_address);
- set_gdbarch_deprecated_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
- set_gdbarch_use_struct_convention (gdbarch, mn10300_use_struct_convention);
tdep->am33_mode = am33_mode;
_initialize_mn10300_tdep (void)
{
/* printf("_initialize_mn10300_tdep\n"); */
-
- register_gdbarch_init (bfd_arch_mn10300, mn10300_gdbarch_init);
+ gdbarch_register (bfd_arch_mn10300, mn10300_gdbarch_init, mn10300_dump_tdep);
}
projects / deliverable / binutils-gdb.git / blobdiff