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Diffstat (limited to 'gdb/config/tic80/tm-tic80.h')
| -rw-r--r-- | gdb/config/tic80/tm-tic80.h | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/gdb/config/tic80/tm-tic80.h b/gdb/config/tic80/tm-tic80.h new file mode 100644 index 00000000000..e17ca95b838 --- /dev/null +++ b/gdb/config/tic80/tm-tic80.h @@ -0,0 +1,257 @@ +/* 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 this if the C compiler puts an underscore at the front + of external names before giving them to the linker. */ + +#define NAMES_HAVE_UNDERSCORE + +#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(val,fi) (val = -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) { (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) \ + (SP) = 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 */ |