| /* Macro definitions for GDB on an Intel i[345]86. |
| Copyright (C) 1995, 1996, 2000 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_I386_H |
| #define TM_I386_H 1 |
| |
| /* Forward decl's for prototypes */ |
| struct frame_info; |
| struct frame_saved_regs; |
| struct type; |
| |
| #define TARGET_BYTE_ORDER LITTLE_ENDIAN |
| |
| /* The format used for `long double' on almost all i386 targets is the |
| i387 extended floating-point format. In fact, of all targets in the |
| GCC 2.95 tree, only OSF/1 does it different, and insists on having |
| a `long double' that's not `long' at all. */ |
| |
| #define TARGET_LONG_DOUBLE_FORMAT &floatformat_i387_ext |
| |
| /* Although the i386 extended floating-point has only 80 significant |
| bits, a `long double' actually takes up 96, probably to enforce |
| alignment. */ |
| |
| #define TARGET_LONG_DOUBLE_BIT 96 |
| |
| /* Used for example in valprint.c:print_floating() to enable checking |
| for NaN's */ |
| |
| #define IEEE_FLOAT (1) |
| |
| /* 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. */ |
| |
| #define START_INFERIOR_TRAPS_EXPECTED 2 |
| |
| /* 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) (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)) |
| |
| /* Stack grows downward. */ |
| |
| #define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) |
| |
| /* 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. */ |
| |
| #define DECR_PC_AFTER_BREAK 1 |
| |
| /* Say how long (ordinary) registers are. This is a piece of bogosity |
| used in push_word and a few other places; REGISTER_RAW_SIZE is the |
| real way to know how big a register is. */ |
| |
| #define REGISTER_SIZE 4 |
| |
| /* This register file is parameterized by two macros: |
| HAVE_I387_REGS --- register file should include i387 registers |
| HAVE_SSE_REGS --- register file should include SSE registers |
| If HAVE_SSE_REGS is #defined, then HAVE_I387_REGS must also be #defined. |
| |
| However, GDB code should not test those macros with #ifdef, since |
| that makes code which is annoying to multi-arch. Instead, GDB code |
| should check the values of NUM_GREGS, NUM_FREGS, and NUM_SSE_REGS, |
| which will eventually get mapped onto architecture vector entries. |
| |
| It's okay to use the macros in tm-*.h files, though, since those |
| files will get completely replaced when we multi-arch anyway. */ |
| |
| /* Number of general registers, present on every 32-bit x86 variant. */ |
| #define NUM_GREGS (16) |
| |
| /* Number of floating-point unit registers. */ |
| #ifdef HAVE_I387_REGS |
| #define NUM_FREGS (16) |
| #else |
| #define NUM_FREGS (0) |
| #endif |
| |
| /* Number of SSE registers. */ |
| #ifdef HAVE_SSE_REGS |
| #define NUM_SSE_REGS (9) |
| #else |
| #define NUM_SSE_REGS (0) |
| #endif |
| |
| #define NUM_REGS (NUM_GREGS + NUM_FREGS + NUM_SSE_REGS) |
| |
| /* Largest number of registers we could have in any configuration. */ |
| #define MAX_NUM_REGS (16 + 16 + 9) |
| |
| /* Initializer for an array of names of registers. There should be at least |
| NUM_REGS strings in this initializer. Any excess ones are simply ignored. |
| The order of the first 8 registers must match the compiler's numbering |
| scheme (which is the same as the 386 scheme) and also regmap in the various |
| *-nat.c files. */ |
| |
| #define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \ |
| "esp", "ebp", "esi", "edi", \ |
| "eip", "eflags", "cs", "ss", \ |
| "ds", "es", "fs", "gs", \ |
| "st0", "st1", "st2", "st3", \ |
| "st4", "st5", "st6", "st7", \ |
| "fctrl", "fstat", "ftag", "fiseg", \ |
| "fioff", "foseg", "fooff", "fop", \ |
| "xmm0", "xmm1", "xmm2", "xmm3", \ |
| "xmm4", "xmm5", "xmm6", "xmm7", \ |
| "mxcsr" \ |
| } |
| |
| /* 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 /* (ebp) Contains address of executing stack |
| frame */ |
| #define SP_REGNUM 4 /* (usp) Contains address of top of stack */ |
| #define PC_REGNUM 8 /* (eip) Contains program counter */ |
| #define PS_REGNUM 9 /* (ps) Contains processor status */ |
| |
| /* These registers are present only if HAVE_I387_REGS is #defined. |
| We promise that FP0 .. FP7 will always be consecutive register numbers. */ |
| #define FP0_REGNUM 16 /* first FPU floating-point register */ |
| #define FP7_REGNUM 23 /* last FPU floating-point register */ |
| |
| /* All of these control registers (except for FCOFF and FDOFF) are |
| sixteen bits long (at most) in the FPU, but are zero-extended to |
| thirty-two bits in GDB's register file. This makes it easier to |
| compute the size of the control register file, and somewhat easier |
| to convert to and from the FSAVE instruction's 32-bit format. */ |
| #define FIRST_FPU_CTRL_REGNUM 24 |
| #define FCTRL_REGNUM 24 /* FPU control word */ |
| #define FPC_REGNUM 24 /* old name for FCTRL_REGNUM */ |
| #define FSTAT_REGNUM 25 /* FPU status word */ |
| #define FTAG_REGNUM 26 /* FPU register tag word */ |
| #define FCS_REGNUM 27 /* FPU instruction's code segment selector |
| 16 bits, called "FPU Instruction Pointer |
| Selector" in the x86 manuals */ |
| #define FCOFF_REGNUM 28 /* FPU instruction's offset within segment |
| ("Fpu Code OFFset") */ |
| #define FDS_REGNUM 29 /* FPU operand's data segment */ |
| #define FDOFF_REGNUM 30 /* FPU operand's offset within segment */ |
| #define FOP_REGNUM 31 /* FPU opcode, bottom eleven bits */ |
| #define LAST_FPU_CTRL_REGNUM 31 |
| |
| /* These registers are present only if HAVE_SSE_REGS is #defined. |
| We promise that XMM0 .. XMM7 will always have consecutive reg numbers. */ |
| #define XMM0_REGNUM 32 /* first SSE data register */ |
| #define XMM7_REGNUM 39 /* last SSE data register */ |
| #define MXCSR_REGNUM 40 /* Streaming SIMD Extension control/status */ |
| |
| #define IS_FP_REGNUM(n) (FP0_REGNUM <= (n) && (n) <= FP7_REGNUM) |
| #define IS_SSE_REGNUM(n) (XMM0_REGNUM <= (n) && (n) <= XMM7_REGNUM) |
| |
| #define FPU_REG_RAW_SIZE (10) |
| |
| /* Sizes of individual register sets. These cover the entire register |
| file, so summing up the sizes of those portions actually present |
| yields REGISTER_BYTES. */ |
| #define SIZEOF_GREGS (NUM_GREGS * 4) |
| #define SIZEOF_FPU_REGS (8 * FPU_REG_RAW_SIZE) |
| #define SIZEOF_FPU_CTRL_REGS \ |
| ((LAST_FPU_CTRL_REGNUM - FIRST_FPU_CTRL_REGNUM + 1) * 4) |
| #define SIZEOF_SSE_REGS (8 * 16 + 4) |
| |
| |
| /* Total amount of space needed to store our copies of the machine's register |
| state, the array `registers'. */ |
| #ifdef HAVE_SSE_REGS |
| #define REGISTER_BYTES \ |
| (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS) |
| #else |
| #ifdef HAVE_I387_REGS |
| #define REGISTER_BYTES (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS) |
| #else |
| #define REGISTER_BYTES (SIZEOF_GREGS) |
| #endif |
| #endif |
| |
| /* Index within `registers' of the first byte of the space for register N. */ |
| #define REGISTER_BYTE(n) (i386_register_byte[(n)]) |
| extern int i386_register_byte[]; |
| |
| /* Number of bytes of storage in the actual machine representation for |
| register N. */ |
| #define REGISTER_RAW_SIZE(n) (i386_register_raw_size[(n)]) |
| extern int i386_register_raw_size[]; |
| |
| /* Largest value REGISTER_RAW_SIZE can have. */ |
| #define MAX_REGISTER_RAW_SIZE 16 |
| |
| /* Number of bytes of storage in the program's representation |
| for register N. */ |
| #define REGISTER_VIRTUAL_SIZE(n) (i386_register_virtual_size[(n)]) |
| extern int i386_register_virtual_size[]; |
| |
| /* Largest value REGISTER_VIRTUAL_SIZE can have. */ |
| #define MAX_REGISTER_VIRTUAL_SIZE 16 |
| |
| /* 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) \ |
| : IS_FP_REGNUM(N) ? builtin_type_long_double \ |
| : IS_SSE_REGNUM(N) ? builtin_type_v4sf \ |
| : builtin_type_int) |
| |
| /* REGISTER_CONVERTIBLE(N) is true iff register N's virtual format is |
| different from its raw format. Note that this definition assumes |
| that the host supports IEEE 32-bit floats, since it doesn't say |
| that SSE registers need conversion. Even if we can't find a |
| counterexample, this is still sloppy. */ |
| #define REGISTER_CONVERTIBLE(n) (IS_FP_REGNUM (n)) |
| |
| /* Convert data from raw format for register REGNUM in buffer FROM to |
| virtual format with type TYPE in buffer TO. */ |
| |
| #define REGISTER_CONVERT_TO_VIRTUAL(regnum, type, from, to) \ |
| i386_register_convert_to_virtual ((regnum), (type), (from), (to)); |
| extern void i386_register_convert_to_virtual (int regnum, struct type *type, |
| char *from, char *to); |
| |
| /* Convert data from virtual format with type TYPE in buffer FROM to |
| raw format for register REGNUM in buffer TO. */ |
| |
| #define REGISTER_CONVERT_TO_RAW(type, regnum, from, to) \ |
| i386_register_convert_to_raw ((type), (regnum), (from), (to)); |
| extern void i386_register_convert_to_raw (struct type *type, int regnum, |
| char *from, char *to); |
| |
| /* Print out the i387 floating point state. */ |
| #ifdef HAVE_I387_REGS |
| extern void i387_float_info (void); |
| #define FLOAT_INFO { i387_float_info (); } |
| #endif |
| |
| |
| /* 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) \ |
| { char buf[REGISTER_SIZE]; \ |
| (SP) -= sizeof (ADDR); \ |
| store_address (buf, sizeof (ADDR), ADDR); \ |
| write_memory ((SP), buf, 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) \ |
| i386_extract_return_value ((type), (regbuf), (valbuf)) |
| extern void i386_extract_return_value (struct type *type, char *regbuf, |
| char *valbuf); |
| |
| /* Write into appropriate registers a function return value of type TYPE, given |
| in virtual format. */ |
| |
| #define STORE_RETURN_VALUE(TYPE,VALBUF) \ |
| { \ |
| if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \ |
| write_register_bytes (REGISTER_BYTE (FP0_REGNUM), (VALBUF), \ |
| TYPE_LENGTH (TYPE)); \ |
| else \ |
| 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)) |
| |
| /* The following redefines make backtracing through sigtramp work. |
| They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp |
| from the sigcontext structure which is pushed by the kernel on the |
| user stack, along with a pointer to it. */ |
| |
| /* FRAME_CHAIN takes a frame's nominal address and produces the frame's |
| chain-pointer. |
| In the case of the i386, the frame's nominal address |
| is the address of a 4-byte word containing the calling frame's address. */ |
| |
| #define FRAME_CHAIN(thisframe) \ |
| ((thisframe)->signal_handler_caller \ |
| ? (thisframe)->frame \ |
| : (!inside_entry_file ((thisframe)->pc) \ |
| ? read_memory_integer ((thisframe)->frame, 4) \ |
| : 0)) |
| |
| /* 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) \ |
| (((FI)->signal_handler_caller) ? 0 : frameless_look_for_prologue(FI)) |
| |
| /* Saved Pc. Get it from sigcontext if within sigtramp. */ |
| |
| #define FRAME_SAVED_PC(FRAME) \ |
| (((FRAME)->signal_handler_caller \ |
| ? sigtramp_saved_pc (FRAME) \ |
| : read_memory_integer ((FRAME)->frame + 4, 4)) \ |
| ) |
| |
| extern CORE_ADDR sigtramp_saved_pc PARAMS ((struct frame_info *)); |
| |
| #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, which is typical now that the C compiler delays popping them. */ |
| |
| #define FRAME_NUM_ARGS(fi) (i386_frame_num_args(fi)) |
| |
| 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. */ |
| |
| extern void i386_frame_init_saved_regs PARAMS ((struct frame_info *)); |
| #define FRAME_INIT_SAVED_REGS(FI) i386_frame_init_saved_regs (FI) |
| |
| |
| |
| /* Things needed for making the inferior call functions. */ |
| |
| /* "An argument's size is increased, if necessary, to make it a |
| multiple of [32 bit] words. This may require tail padding, |
| depending on the size of the argument" - from the x86 ABI. */ |
| #define PARM_BOUNDARY 32 |
| |
| /* 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 */ |
| |
| #define CALL_DUMMY_BREAKPOINT_OFFSET 5 |
| |
| /* 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 /* ifndef TM_I386_H */ |