| /* 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 |
| |
| /* Forward declare structs used in prototypes */ |
| struct frame_info; |
| struct type; |
| struct value; |
| struct symbol; |
| struct frame_saved_regs; |
| |
| #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 (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 (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 (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 (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 (struct frame_info *); |
| |
| #define FRAME_SAVED_PC(FRAME) tic80_frame_saved_pc (FRAME) |
| extern CORE_ADDR tic80_frame_saved_pc (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 (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 (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 */ |