[thirdparty/binutils-gdb.git] / gdb / config / tic80 / tm-tic80.h

/* Parameters for execution on a TI TMS320C80 (MVP) processor.
   Copyright 1997
   Free Software Foundation, Inc. 

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef TM_TIC80_H
#define TM_TIC80_H

#ifdef __STDC__			/* Forward declare structs used in prototypes */
struct frame_info;
struct type;
struct value;
struct symbol;
struct frame_saved_regs;
#endif

#define TARGET_BYTE_ORDER LITTLE_ENDIAN

#define NUM_REGS 38

#define REGISTER_NAMES \
{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
  "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
  "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
  "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
  "pc", "npc", \
  "a0", "a1", "a2", "a3", \
}

/* Various dedicated register numbers
   FIXME: Shadow updates in sim/tic80/sim-calls.c */

#define SP_REGNUM 1		/* Contains address of top of stack */
#define ARG0_REGNUM 2		/* Contains argument 1 (r3 has high word) */
#define RET_REGNUM  2		/* Contains function return value */
#define ARGLAST_REGNUM 12	/* Contains argument 6 (r13 has high word) */
#define FP_REGNUM 30		/* Contains address of executing stack frame */
#define LR_REGNUM 31		/* Contains address of caller (link register) */
#define PC_REGNUM 32		/* Contains program counter (FIXME?) */
#define NPC_REGNUM 33		/* Contains the next program counter (FIXME?) */
#define A0_REGNUM 34		/* Accumulator register 0 */
#define A3_REGNUM 37		/* Accumulator register 1 */

#define R0_REGNUM 0		/* General Purpose Register 0 - for sim */
#define Rn_REGNUM 31		/* Last General Purpose Register - for sim */
#define An_REGNUM A3_REGNUM	/* Last Accumulator register - for sim */

/* Total amount of space needed to store our copies of the machine's
   register state, the array `registers'.  */

#define REGISTER_BYTES (((NUM_REGS - 4) * 4) + (4 * 8))

/* Index within `registers' of the first byte of the space for
   register N.  */

#define REGISTER_BYTE(N) \
   (((N) >= A0_REGNUM) ? (((N) - A0_REGNUM) * 8 + A0_REGNUM * 4) : ((N) * 4))

/* Most registers are 4 bytes */

#define REGISTER_SIZE 4

/* Some registers are 8 bytes.  */

#define REGISTER_RAW_SIZE(N) \
     (((N) >= A0_REGNUM) ? 8 : 4)

/* Largest value REGISTER_RAW_SIZE can have.  */

#define MAX_REGISTER_RAW_SIZE (8)

/* All regs are 4 bytes.  */

#define REGISTER_VIRTUAL_SIZE(N) (REGISTER_RAW_SIZE(N))

/* Largest value REGISTER_VIRTUAL_SIZE can have.  */

#define MAX_REGISTER_VIRTUAL_SIZE (MAX_REGISTER_RAW_SIZE)

/* Return the GDB type object for the "standard" data type
   of data in register N.  */

#define REGISTER_VIRTUAL_TYPE(N) /* FIXME? */ \
	(((N) >= A0_REGNUM) ? builtin_type_float : builtin_type_int)

/* Offset from address of function to start of its code.
   Zero on most machines.  */

#define FUNCTION_START_OFFSET 0

/* Stack grows downward.  */

#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))

/* Sequence of bytes for breakpoint instruction.
   This is padded out to the size of a machine word. */

#define BREAKPOINT 		{0x49, 0x80, 0x00, 0x00}	/* FIXME! */

/* Amount PC must be decremented by after a breakpoint.
   This is often the number of bytes in BREAKPOINT
   but not always.  */

#define DECR_PC_AFTER_BREAK	0	/* FIXME! */

/* Discard from the stack the innermost frame, restoring all registers.  */

#define POP_FRAME tic80_pop_frame(get_current_frame ())
extern struct frame_info *tic80_pop_frame PARAMS ((struct frame_info * frame));

/* Return number of bytes at start of arglist that are not really args.  */

#define FRAME_ARGS_SKIP 0

/* Set VAL to the number of args passed to frame described by FI.
   Can set VAL to -1, meaning no way to tell.  */
/* We can't tell how many args there are */

#define FRAME_NUM_ARGS(fi) (-1)

#define FRAME_ARGS_SKIP 0
#define FRAME_ARGS_ADDRESS(fi)   (fi)->frame
#define FRAME_LOCALS_ADDRESS(fi) (fi)->frame

/* Define other aspects of the stack frame. 
   We keep the offsets of all saved registers, 'cause we need 'em a lot!
   We also keep the current size of the stack frame, and the offset of
   the frame pointer from the stack pointer (for frameless functions, and
   when we're still in the prologue of a function with a frame) */

#define EXTRA_FRAME_INFO  	\
  struct frame_saved_regs fsr;	\
  int framesize;		\
  int frameoffset;		\
  int framereg;

extern void tic80_init_extra_frame_info PARAMS ((struct frame_info * fi));
#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) tic80_init_extra_frame_info (fi)
#define INIT_FRAME_PC		/* Not necessary */

/* Put here the code to store, into a struct frame_saved_regs,
   the addresses of the saved registers of frame described by FRAME_INFO.
   This includes special registers such as pc and fp saved in special
   ways in the stack frame.  sp is even more special:
   the address we return for it IS the sp for the next frame.  */

#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)	    \
   tic80_frame_find_saved_regs(frame_info, &(frame_saved_regs))
extern void tic80_frame_find_saved_regs PARAMS ((struct frame_info *, struct frame_saved_regs *));

/* Advance PC across any function entry prologue instructions
   to reach some "real" code.  */

#define SKIP_PROLOGUE(pc) (tic80_skip_prologue (pc))
extern CORE_ADDR tic80_skip_prologue PARAMS ((CORE_ADDR pc));

/* Immediately after a function call, return the saved pc.
   Can't always go through the frames for this because on some machines
   the new frame is not set up until the new function executes
   some instructions.  */

#define SAVED_PC_AFTER_CALL(frame) read_register (LR_REGNUM)

/* Describe the pointer in each stack frame to the previous stack frame
   (its caller).  */

/* FRAME_CHAIN takes a frame's nominal address
   and produces the frame's chain-pointer. */

#define FRAME_CHAIN(thisframe) (CORE_ADDR) tic80_frame_chain (thisframe)
extern CORE_ADDR tic80_frame_chain PARAMS ((struct frame_info *));

#define FRAME_SAVED_PC(FRAME)	tic80_frame_saved_pc (FRAME)
extern CORE_ADDR tic80_frame_saved_pc PARAMS ((struct frame_info *));

/* Store the address of the place in which to copy the structure the
   subroutine will return.  This is called from call_function. 

   We store structs through a pointer passed in R2 */

#define STORE_STRUCT_RETURN(STRUCT_ADDR, SP)	\
	write_register (ARG0_REGNUM, STRUCT_ADDR)

/* Extract from an array REGBUF containing the (raw) register state
   a function return value of type TYPE, and copy that, in virtual format,
   into VALBUF.  */

#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
  memcpy ((VALBUF), \
	  (char *)(REGBUF) + REGISTER_BYTE (RET_REGNUM) + \
	  ((TYPE_LENGTH (TYPE) > 4 ? 8 : 4) - TYPE_LENGTH (TYPE)), \
	  TYPE_LENGTH (TYPE))

/* Write into appropriate registers a function return value
   of type TYPE, given in virtual format.  */

#define STORE_RETURN_VALUE(TYPE,VALBUF) \
  write_register_bytes(REGISTER_BYTE (RET_REGNUM) + \
		       ((TYPE_LENGTH (TYPE) > 4 ? 8:4) - TYPE_LENGTH (TYPE)),\
		       (VALBUF), TYPE_LENGTH (TYPE));


/* PUSH_ARGUMENTS */
extern CORE_ADDR tic80_push_arguments PARAMS ((int nargs,
					       struct value ** args,
					       CORE_ADDR sp,
					       unsigned char struct_return,
					       CORE_ADDR struct_addr));

#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
  (tic80_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))

/* PUSH_RETURN_ADDRESS */
extern CORE_ADDR tic80_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR));
#define PUSH_RETURN_ADDRESS(PC, SP)	tic80_push_return_address (PC, SP)

/* override the standard get_saved_register function with 
   one that takes account of generic CALL_DUMMY frames */
#define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
      generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)

#define USE_GENERIC_DUMMY_FRAMES 1
#define CALL_DUMMY                   {0}
#define CALL_DUMMY_LENGTH            (0)
#define CALL_DUMMY_START_OFFSET      (0)
#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
#define FIX_CALL_DUMMY(DUMMY1, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
#define CALL_DUMMY_LOCATION          AT_ENTRY_POINT
#define CALL_DUMMY_ADDRESS()         entry_point_address ()

/* generic dummy frame stuff */

#define PUSH_DUMMY_FRAME             generic_push_dummy_frame ()
#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)

#endif /* TM_TIC80_H */
Commit	Line	Data
e49d4fa6 SS	1	/* Parameters for execution on a TI TMS320C80 (MVP) processor.
	2	Copyright 1997
	3	Free Software Foundation, Inc.
	4
c5aa993b	5	This file is part of GDB.
e49d4fa6	6
c5aa993b JM	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
e49d4fa6	11
c5aa993b JM	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
e49d4fa6	16
c5aa993b JM	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 59 Temple Place - Suite 330,
	20	Boston, MA 02111-1307, USA. */
e49d4fa6 SS	21
	22	#ifndef TM_TIC80_H
	23	#define TM_TIC80_H
	24
c5aa993b	25	#ifdef __STDC__ /* Forward declare structs used in prototypes */
e49d4fa6 SS	26	struct frame_info;
	27	struct type;
	28	struct value;
	29	struct symbol;
	30	struct frame_saved_regs;
	31	#endif
	32
	33	#define TARGET_BYTE_ORDER LITTLE_ENDIAN
	34
e49d4fa6 SS	35	#define NUM_REGS 38
	36
	37	#define REGISTER_NAMES \
	38	{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
	39	"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
	40	"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
	41	"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
	42	"pc", "npc", \
	43	"a0", "a1", "a2", "a3", \
	44	}
	45
	46	/* Various dedicated register numbers
	47	FIXME: Shadow updates in sim/tic80/sim-calls.c */
	48
	49	#define SP_REGNUM 1 /* Contains address of top of stack */
	50	#define ARG0_REGNUM 2 /* Contains argument 1 (r3 has high word) */
	51	#define RET_REGNUM 2 /* Contains function return value */
	52	#define ARGLAST_REGNUM 12 /* Contains argument 6 (r13 has high word) */
	53	#define FP_REGNUM 30 /* Contains address of executing stack frame */
	54	#define LR_REGNUM 31 /* Contains address of caller (link register) */
	55	#define PC_REGNUM 32 /* Contains program counter (FIXME?) */
	56	#define NPC_REGNUM 33 /* Contains the next program counter (FIXME?) */
	57	#define A0_REGNUM 34 /* Accumulator register 0 */
	58	#define A3_REGNUM 37 /* Accumulator register 1 */
	59
c5aa993b JM	60	#define R0_REGNUM 0 /* General Purpose Register 0 - for sim */
	61	#define Rn_REGNUM 31 /* Last General Purpose Register - for sim */
	62	#define An_REGNUM A3_REGNUM /* Last Accumulator register - for sim */
e49d4fa6 SS	63
	64	/* Total amount of space needed to store our copies of the machine's
	65	register state, the array `registers'. */
	66
	67	#define REGISTER_BYTES (((NUM_REGS - 4) * 4) + (4 * 8))
	68
	69	/* Index within `registers' of the first byte of the space for
	70	register N. */
	71
	72	#define REGISTER_BYTE(N) \
	73	(((N) >= A0_REGNUM) ? (((N) - A0_REGNUM) * 8 + A0_REGNUM * 4) : ((N) * 4))
	74
	75	/* Most registers are 4 bytes */
	76
	77	#define REGISTER_SIZE 4
	78
	79	/* Some registers are 8 bytes. */
	80
	81	#define REGISTER_RAW_SIZE(N) \
	82	(((N) >= A0_REGNUM) ? 8 : 4)
	83
	84	/* Largest value REGISTER_RAW_SIZE can have. */
	85
	86	#define MAX_REGISTER_RAW_SIZE (8)
	87
	88	/* All regs are 4 bytes. */
	89
	90	#define REGISTER_VIRTUAL_SIZE(N) (REGISTER_RAW_SIZE(N))
	91
	92	/* Largest value REGISTER_VIRTUAL_SIZE can have. */
	93
	94	#define MAX_REGISTER_VIRTUAL_SIZE (MAX_REGISTER_RAW_SIZE)
	95
	96	/* Return the GDB type object for the "standard" data type
	97	of data in register N. */
	98
	99	#define REGISTER_VIRTUAL_TYPE(N) /* FIXME? */ \
	100	(((N) >= A0_REGNUM) ? builtin_type_float : builtin_type_int)
	101
	102	/* Offset from address of function to start of its code.
	103	Zero on most machines. */
	104
	105	#define FUNCTION_START_OFFSET 0
	106
	107	/* Stack grows downward. */
	108
	109	#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
	110
	111	/* Sequence of bytes for breakpoint instruction.
	112	This is padded out to the size of a machine word. */
	113
	114	#define BREAKPOINT {0x49, 0x80, 0x00, 0x00} /* FIXME! */
	115
	116	/* Amount PC must be decremented by after a breakpoint.
	117	This is often the number of bytes in BREAKPOINT
	118	but not always. */
	119
c5aa993b	120	#define DECR_PC_AFTER_BREAK 0 /* FIXME! */
e49d4fa6 SS	121
	122	/* Discard from the stack the innermost frame, restoring all registers. */
	123
	124	#define POP_FRAME tic80_pop_frame(get_current_frame ())
c5aa993b	125	extern struct frame_info tic80_pop_frame PARAMS ((struct frame_info frame));
e49d4fa6 SS	126
	127	/* Return number of bytes at start of arglist that are not really args. */
	128
	129	#define FRAME_ARGS_SKIP 0
	130
	131	/* Set VAL to the number of args passed to frame described by FI.
	132	Can set VAL to -1, meaning no way to tell. */
	133	/* We can't tell how many args there are */
	134
392a587b	135	#define FRAME_NUM_ARGS(fi) (-1)
e49d4fa6 SS	136
	137	#define FRAME_ARGS_SKIP 0
	138	#define FRAME_ARGS_ADDRESS(fi) (fi)->frame
	139	#define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
	140
	141	/* Define other aspects of the stack frame.
	142	We keep the offsets of all saved registers, 'cause we need 'em a lot!
	143	We also keep the current size of the stack frame, and the offset of
	144	the frame pointer from the stack pointer (for frameless functions, and
	145	when we're still in the prologue of a function with a frame) */
	146
	147	#define EXTRA_FRAME_INFO \
	148	struct frame_saved_regs fsr; \
	149	int framesize; \
	150	int frameoffset; \
	151	int framereg;
	152
c5aa993b	153	extern void tic80_init_extra_frame_info PARAMS ((struct frame_info * fi));
e49d4fa6 SS	154	#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) tic80_init_extra_frame_info (fi)
	155	#define INIT_FRAME_PC /* Not necessary */
	156
	157	/* Put here the code to store, into a struct frame_saved_regs,
	158	the addresses of the saved registers of frame described by FRAME_INFO.
	159	This includes special registers such as pc and fp saved in special
	160	ways in the stack frame. sp is even more special:
	161	the address we return for it IS the sp for the next frame. */
	162
	163	#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
	164	tic80_frame_find_saved_regs(frame_info, &(frame_saved_regs))
	165	extern void tic80_frame_find_saved_regs PARAMS ((struct frame_info , struct frame_saved_regs ));
	166
	167	/* Advance PC across any function entry prologue instructions
	168	to reach some "real" code. */
	169
b83266a0	170	#define SKIP_PROLOGUE(pc) (tic80_skip_prologue (pc))
e49d4fa6 SS	171	extern CORE_ADDR tic80_skip_prologue PARAMS ((CORE_ADDR pc));
	172
	173	/* Immediately after a function call, return the saved pc.
	174	Can't always go through the frames for this because on some machines
	175	the new frame is not set up until the new function executes
	176	some instructions. */
	177
	178	#define SAVED_PC_AFTER_CALL(frame) read_register (LR_REGNUM)
	179
	180	/* Describe the pointer in each stack frame to the previous stack frame
	181	(its caller). */
	182
	183	/* FRAME_CHAIN takes a frame's nominal address
	184	and produces the frame's chain-pointer. */
	185
	186	#define FRAME_CHAIN(thisframe) (CORE_ADDR) tic80_frame_chain (thisframe)
	187	extern CORE_ADDR tic80_frame_chain PARAMS ((struct frame_info *));
	188
	189	#define FRAME_SAVED_PC(FRAME) tic80_frame_saved_pc (FRAME)
	190	extern CORE_ADDR tic80_frame_saved_pc PARAMS ((struct frame_info *));
	191
	192	/* Store the address of the place in which to copy the structure the
	193	subroutine will return. This is called from call_function.
	194
	195	We store structs through a pointer passed in R2 */
	196
	197	#define STORE_STRUCT_RETURN(STRUCT_ADDR, SP) \
	198	write_register (ARG0_REGNUM, STRUCT_ADDR)
	199
	200	/* Extract from an array REGBUF containing the (raw) register state
	201	a function return value of type TYPE, and copy that, in virtual format,
	202	into VALBUF. */
	203
	204	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
	205	memcpy ((VALBUF), \
	206	(char *)(REGBUF) + REGISTER_BYTE (RET_REGNUM) + \
	207	((TYPE_LENGTH (TYPE) > 4 ? 8 : 4) - TYPE_LENGTH (TYPE)), \
	208	TYPE_LENGTH (TYPE))
	209
	210	/* Write into appropriate registers a function return value
	211	of type TYPE, given in virtual format. */
	212
	213	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
	214	write_register_bytes(REGISTER_BYTE (RET_REGNUM) + \
	215	((TYPE_LENGTH (TYPE) > 4 ? 8:4) - TYPE_LENGTH (TYPE)),\
	216	(VALBUF), TYPE_LENGTH (TYPE));
	217
	218
	219
	220	/* PUSH_ARGUMENTS */
c5aa993b JM	221	extern CORE_ADDR tic80_push_arguments PARAMS ((int nargs,
c5aa993b JM	222	struct value ** args,
e49d4fa6 SS	223	CORE_ADDR sp,
	224	unsigned char struct_return,
	225	CORE_ADDR struct_addr));
	226
	227	#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
392a587b	228	(tic80_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
e49d4fa6 SS	229
	230	/* PUSH_RETURN_ADDRESS */
	231	extern CORE_ADDR tic80_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR));
	232	#define PUSH_RETURN_ADDRESS(PC, SP) tic80_push_return_address (PC, SP)
	233
	234	/* override the standard get_saved_register function with
	235	one that takes account of generic CALL_DUMMY frames */
	236	#define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
	237	generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
	238
	239	#define USE_GENERIC_DUMMY_FRAMES 1
	240	#define CALL_DUMMY {0}
	241	#define CALL_DUMMY_LENGTH (0)
	242	#define CALL_DUMMY_START_OFFSET (0)
	243	#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
	244	#define FIX_CALL_DUMMY(DUMMY1, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
	245	#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
	246	#define CALL_DUMMY_ADDRESS() entry_point_address ()
	247
	248	/* generic dummy frame stuff */
	249
	250	#define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
	251	#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
	252
c5aa993b	253	#endif /* TM_TIC80_H */