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* i386-tdep.c (i386_register_to_value, i386_value_to_register):

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Move floating-point code to new function in i387-tdep.c.
* i387-tdep.c (i387_register_to_value, i387_value_to_register):
New functions containing code moved here from i386-tdep.c.
* i387-tdep.h: Add opaque declaration for `struct type'.
(i387_register_to_value, i387_value_to_register): New prototypes.
* x86-64-tdep.c (x86_64_convert_register_p): New function.
(x86_64_init_abi): Set convert_register_p, register_to_value and
value_to_register here.
This commit is contained in:
Mark Kettenis 2003-06-15 11:01:46 +00:00
parent f63f176ed6
commit d532c08fb0
5 changed files with 114 additions and 54 deletions
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12
gdb/ChangeLog
View File

@ -1,3 +1,15 @@
2003-06-15 Mark Kettenis <kettenis@gnu.org>
* i386-tdep.c (i386_register_to_value, i386_value_to_register):
Move floating-point code to new function in i387-tdep.c.
* i387-tdep.c (i387_register_to_value, i387_value_to_register):
New functions containing code moved here from i386-tdep.c.
* i387-tdep.h: Add opaque declaration for `struct type'.
(i387_register_to_value, i387_value_to_register): New prototypes.
* x86-64-tdep.c (x86_64_convert_register_p): New function.
(x86_64_init_abi): Set convert_register_p, register_to_value and
value_to_register here.
2003-06-14 Andrew Cagney <cagney@redhat.com>
* mips-tdep.c (mips_register_to_value): Make static.

78
gdb/i386-tdep.c
View File

@ -1392,36 +1392,21 @@ i386_register_to_value (struct frame_info *frame, int regnum,
if (i386_fp_regnum_p (regnum))
{
char from[I386_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. */
frame_read_register (frame, regnum, from);
convert_typed_floating (from, builtin_type_i387_ext, to, type);
i387_register_to_value (frame, regnum, type, to);
return;
}
else
{
gdb_assert (TYPE_LENGTH (type) == 8);
/* Read the first part. */
gdb_assert (register_size (current_gdbarch, regnum) == 4);
frame_read_register (frame, regnum, (char *) to + 0);
gdb_assert (TYPE_LENGTH (type) == 8);
/* Read the second part. */
regnum = i386_next_regnum (regnum);
gdb_assert (regnum != -1);
gdb_assert (register_size (current_gdbarch, regnum));
frame_read_register (frame, regnum, (char *) to + 4);
}
/* Read the first part. */
gdb_assert (register_size (current_gdbarch, regnum) == 4);
frame_read_register (frame, regnum, (char *) to + 0);
/* Read the second part. */
regnum = i386_next_regnum (regnum);
gdb_assert (regnum != -1);
gdb_assert (register_size (current_gdbarch, regnum));
frame_read_register (frame, regnum, (char *) to + 4);
}
/* Write the contents FROM of a value of type TYPE into register
@ -1433,36 +1418,21 @@ i386_value_to_register (struct frame_info *frame, int regnum,
{
if (i386_fp_regnum_p (regnum))
{
char to[I386_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_i387_ext);
put_frame_register (frame, regnum, to);
i387_value_to_register (frame, regnum, type, from);
return;
}
else
{
gdb_assert (TYPE_LENGTH (type) == 8);
/* Write the first part. */
gdb_assert (register_size (current_gdbarch, regnum) == 4);
put_frame_register (frame, regnum, (const char *) from + 0);
gdb_assert (TYPE_LENGTH (type) == 8);
/* Write the second part. */
regnum = i386_next_regnum (regnum);
gdb_assert (regnum != -1);
gdb_assert (register_size (current_gdbarch, regnum) == 4);
put_frame_register (frame, regnum, (const char *) from + 4);
}
/* Write the first part. */
gdb_assert (register_size (current_gdbarch, regnum) == 4);
put_frame_register (frame, regnum, (const char *) from + 0);
/* Write the second part. */
regnum = i386_next_regnum (regnum);
gdb_assert (regnum != -1);
gdb_assert (register_size (current_gdbarch, regnum) == 4);
put_frame_register (frame, regnum, (const char *) from + 4);
}

52
gdb/i387-tdep.c
View File

@ -282,6 +282,58 @@ i387_print_float_info (struct gdbarch *gdbarch, struct ui_file *file,
fprintf_filtered (file, "Opcode: %s\n",
local_hex_string_custom (fop ? (fop | 0xd800) : 0, "04"));
}
/* Read a value of type TYPE from register REGNUM in frame FRAME, and
return its contents in TO. */
void
i387_register_to_value (struct frame_info *frame, int regnum,
struct type *type, void *to)
{
char from[I386_MAX_REGISTER_SIZE];
gdb_assert (i386_fp_regnum_p (regnum));
/* 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. */
frame_read_register (frame, regnum, from);
convert_typed_floating (from, builtin_type_i387_ext, to, type);
}
/* Write the contents FROM of a value of type TYPE into register
REGNUM in frame FRAME. */
void
i387_value_to_register (struct frame_info *frame, int regnum,
struct type *type, const void *from)
{
char to[I386_MAX_REGISTER_SIZE];
gdb_assert (i386_fp_regnum_p (regnum));
/* 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_i387_ext);
put_frame_register (frame, regnum, to);
}
/* FIXME: kettenis/2000-05-21: Right now more than a few i386 targets
define their own routines to manage the floating-point registers in

13
gdb/i387-tdep.h
View File

@ -24,6 +24,7 @@
struct gdbarch;
struct ui_file;
struct frame_info;
struct type;
/* Print out the i387 floating point state. */
@ -32,6 +33,18 @@ extern void i387_print_float_info (struct gdbarch *gdbarch,
struct frame_info *frame,
const char *args);
/* Read a value of type TYPE from register REGNUM in frame FRAME, and
return its contents in TO. */
extern void i387_register_to_value (struct frame_info *frame, int regnum,
struct type *type, void *to);
/* Write the contents FROM of a value of type TYPE into register
REGNUM in frame FRAME. */
extern void i387_value_to_register (struct frame_info *frame, int regnum,
struct type *type, const void *from);
/* Fill register REGNUM in GDB's register array with the appropriate
value from *FSAVE. This function masks off any of the reserved
bits in *FSAVE. */

13
gdb/x86-64-tdep.c
View File

@ -208,6 +208,15 @@ x86_64_dwarf_reg_to_regnum (int reg)
return regnum;
}
/* Return nonzero if a value of type TYPE stored in register REGNUM
needs any special handling. */
static int
x86_64_convert_register_p (int regnum, struct type *type)
{
return i386_fp_regnum_p (regnum);
}
/* The returning of values is done according to the special algorithm.
@ -1178,6 +1187,10 @@ x86_64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* Call dummy code. */
set_gdbarch_push_dummy_call (gdbarch, x86_64_push_dummy_call);
set_gdbarch_convert_register_p (gdbarch, x86_64_convert_register_p);
set_gdbarch_register_to_value (gdbarch, i387_register_to_value);
set_gdbarch_value_to_register (gdbarch, i387_value_to_register);
set_gdbarch_extract_return_value (gdbarch, x86_64_extract_return_value);
set_gdbarch_store_return_value (gdbarch, x86_64_store_return_value);
/* Override, since this is handled by x86_64_extract_return_value. */