253 lines
8.9 KiB
C
253 lines
8.9 KiB
C
/* 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 */
|