| /* Macro definitions for i386, Unix System V. |
| Copyright 1986, 1987, 1989, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| |
| #if !defined (TM_I386V_H) |
| #define TM_I386V_H 1 |
| |
| /* |
| * Changes for 80386 by Pace Willisson (pace@prep.ai.mit.edu) |
| * July 1988 |
| */ |
| |
| #define TARGET_BYTE_ORDER LITTLE_ENDIAN |
| |
| /* define this if you don't have the extension to coff that allows |
| * file names to appear in the string table |
| * (aux.x_file.x_foff) |
| */ |
| #define COFF_NO_LONG_FILE_NAMES |
| |
| /* turn this on when rest of gdb is ready */ |
| #define IEEE_FLOAT |
| |
| /* 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 */ |
| |
| /* number of traps that happen between exec'ing the shell |
| * to run an inferior, and when we finally get to |
| * the inferior code. This is 2 on most implementations. |
| */ |
| #ifndef START_INFERIOR_TRAPS_EXPECTED |
| #define START_INFERIOR_TRAPS_EXPECTED 4 |
| #endif |
| |
| /* Offset from address of function to start of its code. |
| Zero on most machines. */ |
| |
| #define FUNCTION_START_OFFSET 0 |
| |
| /* Advance PC across any function entry prologue instructions |
| to reach some "real" code. */ |
| |
| #define SKIP_PROLOGUE(frompc) {(frompc) = i386_skip_prologue((frompc));} |
| |
| extern int |
| i386_skip_prologue PARAMS ((int)); |
| |
| /* 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_memory_integer (read_register (SP_REGNUM), 4)) |
| |
| /* Address of end of stack space. */ |
| |
| #define STACK_END_ADDR 0x80000000 |
| |
| /* Stack grows downward. */ |
| |
| #define INNER_THAN < |
| |
| /* Sequence of bytes for breakpoint instruction. */ |
| |
| #define BREAKPOINT {0xcc} |
| |
| /* Amount PC must be decremented by after a breakpoint. |
| This is often the number of bytes in BREAKPOINT |
| but not always. */ |
| |
| #ifndef DECR_PC_AFTER_BREAK |
| #define DECR_PC_AFTER_BREAK 1 |
| #endif |
| |
| /* Nonzero if instruction at PC is a return instruction. */ |
| |
| #define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0xc3) |
| |
| /* Return 1 if P points to an invalid floating point value. |
| LEN is the length in bytes -- not relevant on the 386. */ |
| |
| #define INVALID_FLOAT(p, len) (0) |
| |
| /* Say how long (ordinary) registers are. */ |
| |
| #define REGISTER_TYPE long |
| |
| /* Number of machine registers */ |
| |
| #define NUM_REGS 16 |
| |
| /* Initializer for an array of names of registers. |
| There should be NUM_REGS strings in this initializer. */ |
| |
| /* the order of the first 8 registers must match the compiler's |
| * numbering scheme (which is the same as the 386 scheme) |
| * also, this table must match regmap in i386-pinsn.c. |
| */ |
| #define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \ |
| "esp", "ebp", "esi", "edi", \ |
| "eip", "ps", "cs", "ss", \ |
| "ds", "es", "fs", "gs", \ |
| } |
| |
| /* Register numbers of various important registers. |
| Note that some of these values are "real" register numbers, |
| and correspond to the general registers of the machine, |
| and some are "phony" register numbers which are too large |
| to be actual register numbers as far as the user is concerned |
| but do serve to get the desired values when passed to read_register. */ |
| |
| #define FP_REGNUM 5 /* Contains address of executing stack frame */ |
| #define SP_REGNUM 4 /* Contains address of top of stack */ |
| |
| #define PC_REGNUM 8 |
| #define PS_REGNUM 9 |
| |
| /* Total amount of space needed to store our copies of the machine's |
| register state, the array `registers'. */ |
| #define REGISTER_BYTES (NUM_REGS * 4) |
| |
| /* Index within `registers' of the first byte of the space for |
| register N. */ |
| |
| #define REGISTER_BYTE(N) ((N)*4) |
| |
| /* Number of bytes of storage in the actual machine representation |
| for register N. */ |
| |
| #define REGISTER_RAW_SIZE(N) (4) |
| |
| /* Number of bytes of storage in the program's representation |
| for register N. */ |
| |
| #define REGISTER_VIRTUAL_SIZE(N) (4) |
| |
| /* Largest value REGISTER_RAW_SIZE can have. */ |
| |
| #define MAX_REGISTER_RAW_SIZE 4 |
| |
| /* Largest value REGISTER_VIRTUAL_SIZE can have. */ |
| |
| #define MAX_REGISTER_VIRTUAL_SIZE 4 |
| |
| /* Nonzero if register N requires conversion |
| from raw format to virtual format. */ |
| |
| #define REGISTER_CONVERTIBLE(N) (0) |
| |
| /* Convert data from raw format for register REGNUM |
| to virtual format for register REGNUM. */ |
| |
| #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \ |
| {memcpy ((TO), (FROM), 4);} |
| |
| /* Convert data from virtual format for register REGNUM |
| to raw format for register REGNUM. */ |
| |
| #define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \ |
| {memcpy ((TO), (FROM), 4);} |
| |
| /* Return the GDB type object for the "standard" data type |
| of data in register N. */ |
| /* Perhaps si and di should go here, but potentially they could be |
| used for things other than address. */ |
| #define REGISTER_VIRTUAL_TYPE(N) \ |
| ((N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM ? \ |
| lookup_pointer_type (builtin_type_void) : builtin_type_int) |
| |
| /* Store the address of the place in which to copy the structure the |
| subroutine will return. This is called from call_function. */ |
| |
| #define STORE_STRUCT_RETURN(ADDR, SP) \ |
| { (SP) -= sizeof (ADDR); \ |
| write_memory ((SP), (char *) &(ADDR), sizeof (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), (REGBUF), 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 (0, VALBUF, TYPE_LENGTH (TYPE)) |
| |
| /* Extract from an array REGBUF containing the (raw) register state |
| the address in which a function should return its structure value, |
| as a CORE_ADDR (or an expression that can be used as one). */ |
| |
| #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF)) |
| |
| |
| /* 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) \ |
| (!inside_entry_file ((thisframe)->pc) ? \ |
| read_memory_integer ((thisframe)->frame, 4) :\ |
| 0) |
| |
| /* Define other aspects of the stack frame. */ |
| |
| /* A macro that tells us whether the function invocation represented |
| by FI does not have a frame on the stack associated with it. If it |
| does not, FRAMELESS is set to 1, else 0. */ |
| #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ |
| (FRAMELESS) = frameless_look_for_prologue(FI) |
| |
| #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4)) |
| |
| #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) |
| |
| #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) |
| |
| /* Return number of args passed to a frame. |
| Can return -1, meaning no way to tell. */ |
| |
| #define FRAME_NUM_ARGS(numargs, fi) (numargs) = i386_frame_num_args(fi) |
| |
| #ifdef __STDC__ /* Forward decl's for prototypes */ |
| struct frame_info; |
| struct frame_saved_regs; |
| #endif |
| |
| extern int |
| i386_frame_num_args PARAMS ((struct frame_info *)); |
| |
| /* Return number of bytes at start of arglist that are not really args. */ |
| |
| #define FRAME_ARGS_SKIP 8 |
| |
| /* 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) \ |
| { i386_frame_find_saved_regs ((frame_info), &(frame_saved_regs)); } |
| |
| extern void |
| i386_frame_find_saved_regs PARAMS ((struct frame_info *, |
| struct frame_saved_regs *)); |
| |
| |
| /* Things needed for making the inferior call functions. */ |
| |
| /* Push an empty stack frame, to record the current PC, etc. */ |
| |
| #define PUSH_DUMMY_FRAME { i386_push_dummy_frame (); } |
| |
| extern void |
| i386_push_dummy_frame PARAMS ((void)); |
| |
| /* Discard from the stack the innermost frame, restoring all registers. */ |
| |
| #define POP_FRAME { i386_pop_frame (); } |
| |
| extern void |
| i386_pop_frame PARAMS ((void)); |
| |
| /* this is |
| * call 11223344 (32 bit relative) |
| * int3 |
| */ |
| |
| #define CALL_DUMMY { 0x223344e8, 0xcc11 } |
| |
| #define CALL_DUMMY_LENGTH 8 |
| |
| #define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */ |
| |
| /* Insert the specified number of args and function address |
| into a call sequence of the above form stored at DUMMYNAME. */ |
| |
| #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ |
| { \ |
| int from, to, delta, loc; \ |
| loc = (int)(read_register (SP_REGNUM) - CALL_DUMMY_LENGTH); \ |
| from = loc + 5; \ |
| to = (int)(fun); \ |
| delta = to - from; \ |
| *((char *)(dummyname) + 1) = (delta & 0xff); \ |
| *((char *)(dummyname) + 2) = ((delta >> 8) & 0xff); \ |
| *((char *)(dummyname) + 3) = ((delta >> 16) & 0xff); \ |
| *((char *)(dummyname) + 4) = ((delta >> 24) & 0xff); \ |
| } |
| |
| extern void |
| print_387_control_word PARAMS ((unsigned int)); |
| |
| extern void |
| print_387_status_word PARAMS ((unsigned int)); |
| |
| /* Offset from SP to first arg on stack at first instruction of a function */ |
| |
| #define SP_ARG0 (1 * 4) |
| |
| #endif /* !defined (TM_I386V_H) */ |