432 lines
16 KiB
C
432 lines
16 KiB
C
/* Macro definitions for GDB on an Intel i[345]86.
|
||
Copyright 1995, 1996, 1998, 1999, 2000, 2001
|
||
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
|
||
|
||
#include "regcache.h"
|
||
|
||
/* Forward declarations for prototypes. */
|
||
struct frame_info;
|
||
struct frame_saved_regs;
|
||
struct value;
|
||
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 (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_unsigned_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
|
||
|
||
|
||
#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
|
||
i386_push_arguments ((nargs), (args), (sp), (struct_return), (struct_addr))
|
||
extern CORE_ADDR i386_push_arguments (int nargs, struct value **args,
|
||
CORE_ADDR sp, int struct_return,
|
||
CORE_ADDR struct_addr);
|
||
|
||
/* 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) \
|
||
i386_store_struct_return ((addr), (sp))
|
||
extern void i386_store_struct_return (CORE_ADDR addr, CORE_ADDR sp);
|
||
|
||
/* 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 the appropriate registers a function return value stored
|
||
in VALBUF of type TYPE, given in virtual format. */
|
||
|
||
#define STORE_RETURN_VALUE(type, valbuf) \
|
||
i386_store_return_value ((type), (valbuf))
|
||
extern void i386_store_return_value (struct type *type, char *valbuf);
|
||
|
||
/* 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. */
|
||
|
||
#define EXTRACT_STRUCT_VALUE_ADDRESS(regbuf) \
|
||
i386_extract_struct_value_address ((regbuf))
|
||
extern CORE_ADDR i386_extract_struct_value_address (char *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_unsigned_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_unsigned_integer ((FRAME)->frame + 4, 4)) \
|
||
)
|
||
|
||
extern CORE_ADDR sigtramp_saved_pc (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 (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 (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 (void);
|
||
|
||
/* Discard from the stack the innermost frame, restoring all registers. */
|
||
|
||
#define POP_FRAME { i386_pop_frame (); }
|
||
|
||
extern void i386_pop_frame (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) \
|
||
i386_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
|
||
extern void i386_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
|
||
int nargs, struct value **args,
|
||
struct type *type, int gcc_p);
|
||
|
||
/* FIXME: kettenis/2000-06-12: These do not belong here. */
|
||
extern void print_387_control_word (unsigned int);
|
||
extern void print_387_status_word (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 */
|