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* m68k-tdep.c (m68k_convert_register_p, m68k_register_to_value)

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(m68k_value_to_register): New functions.
(m68k_gdbarch_init): Set convert_register_p, register_to_value and
value_to_register.
This commit is contained in:
Mark Kettenis 2004-05-09 18:51:38 +00:00
parent 31db7b6c38
commit e47577ab7b
2 changed files with 64 additions and 0 deletions
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5
gdb/ChangeLog
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@ -1,5 +1,10 @@
2004-05-09 Mark Kettenis <kettenis@gnu.org>
* m68k-tdep.c (m68k_convert_register_p, m68k_register_to_value)
(m68k_value_to_register): New functions.
(m68k_gdbarch_init): Set convert_register_p, register_to_value and
value_to_register.
* defs.h (enum return_value_convention): Add
RETURN_VALUE_ABI_RETURNS_ADDRESS and
RETURN_VALUE_ABI_PRESERVES_ADDRESS.

59
gdb/m68k-tdep.c
View File

@ -129,6 +129,62 @@ m68k_register_name (int regnum)
else
return register_names[regnum];
}
/* Return nonzero if a value of type TYPE stored in register REGNUM
needs any special handling. */
static int
m68k_convert_register_p (int regnum, struct type *type)
{
return (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FP0_REGNUM + 7);
}
/* Read a value of type TYPE from register REGNUM in frame FRAME, and
return its contents in TO. */
static void
m68k_register_to_value (struct frame_info *frame, int regnum,
struct type *type, void *to)
{
char from[M68K_MAX_REGISTER_SIZE];
/* We only support floating-point values. */
if (TYPE_CODE (type) != TYPE_CODE_FLT)
{
warning ("Cannot convert floating-point register value "
"to non-floating-point type.");
return;
}
/* Convert to TYPE. This should be a no-op if TYPE is equivalent to
the extended floating-point format used by the FPU. */
get_frame_register (frame, regnum, from);
convert_typed_floating (from, builtin_type_m68881_ext, to, type);
}
/* Write the contents FROM of a value of type TYPE into register
REGNUM in frame FRAME. */
static void
m68k_value_to_register (struct frame_info *frame, int regnum,
struct type *type, const void *from)
{
char to[M68K_MAX_REGISTER_SIZE];
/* We only support floating-point values. */
if (TYPE_CODE (type) != TYPE_CODE_FLT)
{
warning ("Cannot convert non-floating-point type "
"to floating-point register value.");
return;
}
/* Convert from TYPE. This should be a no-op if TYPE is equivalent
to the extended floating-point format used by the FPU. */
convert_typed_floating (from, type, to, builtin_type_m68881_ext);
put_frame_register (frame, regnum, to);
}
/* There is a fair number of calling conventions that are in somewhat
wide use. The 68000/08/10 don't support an FPU, not even as a
@ -1051,6 +1107,9 @@ m68k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
set_gdbarch_pc_regnum (gdbarch, M68K_PC_REGNUM);
set_gdbarch_ps_regnum (gdbarch, M68K_PS_REGNUM);
set_gdbarch_fp0_regnum (gdbarch, M68K_FP0_REGNUM);
set_gdbarch_convert_register_p (gdbarch, m68k_convert_register_p);
set_gdbarch_register_to_value (gdbarch, m68k_register_to_value);
set_gdbarch_value_to_register (gdbarch, m68k_value_to_register);
set_gdbarch_push_dummy_call (gdbarch, m68k_push_dummy_call);
set_gdbarch_return_value (gdbarch, m68k_return_value);