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* config/mips/tm-irix3.h: Clean up, use tm-bigmips.h and redefine

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the necessary bits.
	* findvar.c (value_from_register): Fix uninitialized first_addr
	which caused problems with assignment of doubles to register variables
	on some targets.
	* mipsread.c: Remove TM_FILE_OVERRIDE, include tm.h and provide the
	missing mips definitions if necessary.

	Fix handling of double register variables for mips targets and big
	endian hosts. These patches are from Paul Flinders <ptf@delcam.co.uk>.
	* config/mips/tm-mips.h: Increase MAX_REGISTER_{RAW,VIRTUAL}_SIZE to
	  8 bytes for doubles.
	* config/mips/tm-mips.h (REGISTER_CONVERT_TO_TYPE): New macro for
	  conversion of type held in multiple registers to host format.
	* config/mips/tm-mips.h (REGISTER_CONVERT_FROM_TYPE): New macro,
	  companion to REGISTER_CONVERT_TO_TYPE.
	* config/mips/tm-mips.h (EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE):
	  Convert to function calls.
	* config/mips/tm-mips.h (FIX_CALL_DUMMY): New code for big endian
	  mips targets.
	* mips-tdep.c (mips_print_register): Raw buffer now needs just
	  MAX_REGISTER_RAW_SIZE bytes.
	* mips-tdep.c (mips_print_register): Use REGISTER_CONVERT_TO_TYPE
	  (if defined) for doubles.
	* mips-tdep.c: (mips_extract_return_value, mips_store_return_value):
	  New functions, take care of REGISTER_CONVERT_TO/FROM_TYPE.
	* valops.c (value_assign): Use REGISTER_CONVERT_TO_TYPE if
	  defined.
	* findvar.c (value_from_register): Use REGISTER_CONVERT_TO_TYPE if
	  defined.
This commit is contained in:
Peter Schauer
1993-05-22 07:26:25 +00:00
parent 43152fe57b
commit ac8cf67dca
5 changed files with 172 additions and 274 deletions
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53
gdb/mips-tdep.c
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@ -32,7 +32,6 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#endif
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <sys/ioctl.h>
@ -613,7 +612,7 @@ static void
mips_print_register (regnum, all)
int regnum, all;
{
unsigned char raw_buffer[MAX_REGISTER_RAW_SIZE * 2]; /* *2 for doubles */
unsigned char raw_buffer[MAX_REGISTER_RAW_SIZE];
REGISTER_TYPE val;
/* Get the data in raw format. */
@ -626,9 +625,15 @@ mips_print_register (regnum, all)
/* If an even floating pointer register, also print as double. */
if (regnum >= FP0_REGNUM && regnum < FP0_REGNUM+32
&& !((regnum-FP0_REGNUM) & 1)) {
read_relative_register_raw_bytes (regnum+1, raw_buffer+4);
char dbuffer[MAX_REGISTER_RAW_SIZE];
read_relative_register_raw_bytes (regnum, dbuffer);
read_relative_register_raw_bytes (regnum+1, dbuffer+4);
#ifdef REGISTER_CONVERT_TO_TYPE
REGISTER_CONVERT_TO_TYPE(regnum, builtin_type_double, dbuffer);
#endif
printf_filtered ("(d%d: ", regnum-FP0_REGNUM);
val_print (builtin_type_double, raw_buffer, 0,
val_print (builtin_type_double, dbuffer, 0,
stdout, 0, 1, 0, Val_pretty_default);
printf_filtered ("); ");
}
@ -801,6 +806,44 @@ mips_skip_prologue(pc)
#endif
}
/* Given a return value in `regbuf' with a type `valtype',
extract and copy its value into `valbuf'. */
void
mips_extract_return_value (valtype, regbuf, valbuf)
struct type *valtype;
char regbuf[REGISTER_BYTES];
char *valbuf;
{
int regnum;
regnum = TYPE_CODE (valtype) == TYPE_CODE_FLT && mips_fpu ? FP0_REGNUM : 2;
memcpy (valbuf, regbuf + REGISTER_BYTE (regnum), TYPE_LENGTH (valtype));
#ifdef REGISTER_CONVERT_TO_TYPE
REGISTER_CONVERT_TO_TYPE(regnum, valtype, valbuf);
#endif
}
/* Given a return value in `regbuf' with a type `valtype',
write it's value into the appropriate register. */
void
mips_store_return_value (valtype, valbuf)
struct type *valtype;
char *valbuf;
{
int regnum;
char raw_buffer[MAX_REGISTER_RAW_SIZE];
regnum = TYPE_CODE (valtype) == TYPE_CODE_FLT && mips_fpu ? FP0_REGNUM : 2;
memcpy(raw_buffer, valbuf, TYPE_LENGTH (valtype));
#ifdef REGISTER_CONVERT_FROM_TYPE
REGISTER_CONVERT_FROM_TYPE(regnum, valtype, raw_buffer);
#endif
write_register_bytes(REGISTER_BYTE (regnum), raw_buffer, TYPE_LENGTH (valtype));
}
/* Let the user turn off floating point and set the fence post for
heuristic_proc_start. */
@ -819,7 +862,7 @@ or dealing with return values.", &setlist),
(add_set_cmd ("heuristic-fence-post", class_support, var_uinteger,
(char *) &heuristic_fence_post,
"Set the distance searched for the start of a function.\n\
Set number of bytes to be searched backward to find the beginning of a
Set number of bytes to be searched backward to find the beginning of a\n\
function without symbols.", &setlist),
&showlist);
}