379 lines
13 KiB
C
379 lines
13 KiB
C
/* Macro definitions for GDB on an Intel i[345]86.
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Copyright 1995, 1996, 1998, 1999, 2000, 2001
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef TM_I386_H
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#define TM_I386_H 1
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#define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL
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#include "regcache.h"
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/* Forward declarations for prototypes. */
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struct frame_info;
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struct frame_saved_regs;
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struct value;
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struct type;
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/* The format used for `long double' on almost all i386 targets is the
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i387 extended floating-point format. In fact, of all targets in the
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GCC 2.95 tree, only OSF/1 does it different, and insists on having
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a `long double' that's not `long' at all. */
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#define TARGET_LONG_DOUBLE_FORMAT &floatformat_i387_ext
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/* Although the i386 extended floating-point has only 80 significant
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bits, a `long double' actually takes up 96, probably to enforce
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alignment. */
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#define TARGET_LONG_DOUBLE_BIT 96
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/* Number of traps that happen between exec'ing the shell to run an
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inferior, and when we finally get to the inferior code. This is 2
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on most implementations. */
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#define START_INFERIOR_TRAPS_EXPECTED 2
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/* Offset from address of function to start of its code.
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Zero on most machines. */
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#define FUNCTION_START_OFFSET 0
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/* Advance PC across any function entry prologue instructions to reach some
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"real" code. */
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#define SKIP_PROLOGUE(frompc) (i386_skip_prologue (frompc))
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extern int i386_skip_prologue (int);
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/* Immediately after a function call, return the saved pc. */
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#define SAVED_PC_AFTER_CALL(frame) i386_saved_pc_after_call (frame)
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extern CORE_ADDR i386_saved_pc_after_call (struct frame_info *frame);
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/* Stack grows downward. */
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#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
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/* Sequence of bytes for breakpoint instruction. */
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#define BREAKPOINT {0xcc}
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/* Amount PC must be decremented by after a breakpoint. This is often the
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number of bytes in BREAKPOINT but not always. */
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#define DECR_PC_AFTER_BREAK 1
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/* Say how long (ordinary) registers are. This is a piece of bogosity
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used in push_word and a few other places; REGISTER_RAW_SIZE is the
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real way to know how big a register is. */
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#define REGISTER_SIZE 4
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/* This register file is parameterized by two macros:
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HAVE_I387_REGS --- register file should include i387 registers
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HAVE_SSE_REGS --- register file should include SSE registers
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If HAVE_SSE_REGS is #defined, then HAVE_I387_REGS must also be #defined.
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However, GDB code should not test those macros with #ifdef, since
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that makes code which is annoying to multi-arch. Instead, GDB code
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should check the values of NUM_GREGS, NUM_FREGS, and NUM_SSE_REGS,
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which will eventually get mapped onto architecture vector entries.
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It's okay to use the macros in tm-*.h files, though, since those
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files will get completely replaced when we multi-arch anyway. */
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/* Number of general registers, present on every 32-bit x86 variant. */
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#define NUM_GREGS (16)
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/* Number of floating-point unit registers. */
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#ifdef HAVE_I387_REGS
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#define NUM_FREGS (16)
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#else
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#define NUM_FREGS (0)
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#endif
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/* Number of SSE registers. */
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#ifdef HAVE_SSE_REGS
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#define NUM_SSE_REGS (9)
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#else
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#define NUM_SSE_REGS (0)
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#endif
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/* Largest number of registers we could have in any configuration. */
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#define MAX_NUM_REGS (16 + 16 + 9)
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/* Register numbers of various important registers.
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Note that some of these values are "real" register numbers,
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and correspond to the general registers of the machine,
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and some are "phony" register numbers which are too large
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to be actual register numbers as far as the user is concerned
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but do serve to get the desired values when passed to read_register. */
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#define FP_REGNUM 5 /* (ebp) Contains address of executing stack
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frame */
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#define SP_REGNUM 4 /* (usp) Contains address of top of stack */
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#define PC_REGNUM 8 /* (eip) Contains program counter */
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#define PS_REGNUM 9 /* (ps) Contains processor status */
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/* First FPU data register. */
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#ifdef HAVE_I387_REGS
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#define FP0_REGNUM 16
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#else
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#define FP0_REGNUM 0
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#endif
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/* Return the name of register REG. */
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#define REGISTER_NAME(reg) i386_register_name ((reg))
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extern char *i386_register_name (int reg);
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/* Use the "default" register numbering scheme for stabs and COFF. */
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#define STAB_REG_TO_REGNUM(reg) i386_stab_reg_to_regnum ((reg))
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#define SDB_REG_TO_REGNUM(reg) i386_stab_reg_to_regnum ((reg))
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extern int i386_stab_reg_to_regnum (int reg);
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/* Use the DWARF register numbering scheme for DWARF and DWARF 2. */
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#define DWARF_REG_TO_REGNUM(reg) i386_dwarf_reg_to_regnum ((reg))
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#define DWARF2_REG_TO_REGNUM(reg) i386_dwarf_reg_to_regnum ((reg))
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extern int i386_dwarf_reg_to_regnum (int reg);
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/* We don't define ECOFF_REG_TO_REGNUM, since ECOFF doesn't seem to be
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in use on any of the supported i386 targets. */
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/* Sizes of individual register sets. These cover the entire register
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file, so summing up the sizes of those portions actually present
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yields REGISTER_BYTES. */
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#define SIZEOF_GREGS (NUM_GREGS * 4)
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#define SIZEOF_FPU_REGS (8 * 10)
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#define SIZEOF_FPU_CTRL_REGS (8 * 4)
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#define SIZEOF_SSE_REGS (8 * 16 + 4)
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/* Total amount of space needed to store our copies of the machine's register
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state, the array `registers'. */
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#ifdef HAVE_SSE_REGS
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#define REGISTER_BYTES \
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(SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS)
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#else
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#ifdef HAVE_I387_REGS
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#define REGISTER_BYTES (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS)
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#else
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#define REGISTER_BYTES (SIZEOF_GREGS)
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#endif
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#endif
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/* Return the offset into the register array of the start of register
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number REG. */
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#define REGISTER_BYTE(reg) i386_register_byte ((reg))
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extern int i386_register_byte (int reg);
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/* Return the number of bytes of storage in GDB's register array
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occupied by register REG. */
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#define REGISTER_RAW_SIZE(reg) i386_register_raw_size ((reg))
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extern int i386_register_raw_size (int reg);
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/* Largest value REGISTER_RAW_SIZE can have. */
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#define MAX_REGISTER_RAW_SIZE 16
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/* Return the size in bytes of the virtual type of register REG. */
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#define REGISTER_VIRTUAL_SIZE(reg) i386_register_virtual_size ((reg))
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extern int i386_register_virtual_size (int reg);
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#define MAX_REGISTER_VIRTUAL_SIZE 16
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/* Return the GDB type object for the "standard" data type of data in
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register REGNUM. */
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#define REGISTER_VIRTUAL_TYPE(regnum) i386_register_virtual_type (regnum)
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extern struct type *i386_register_virtual_type (int regnum);
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/* Return true iff register REGNUM's virtual format is different from
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its raw format. */
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#define REGISTER_CONVERTIBLE(regnum) i386_register_convertible (regnum)
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extern int i386_register_convertible (int regnum);
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/* Convert data from raw format for register REGNUM in buffer FROM to
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virtual format with type TYPE in buffer TO. */
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#define REGISTER_CONVERT_TO_VIRTUAL(regnum, type, from, to) \
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i386_register_convert_to_virtual ((regnum), (type), (from), (to))
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extern void i386_register_convert_to_virtual (int regnum, struct type *type,
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char *from, char *to);
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/* Convert data from virtual format with type TYPE in buffer FROM to
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raw format for register REGNUM in buffer TO. */
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#define REGISTER_CONVERT_TO_RAW(type, regnum, from, to) \
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i386_register_convert_to_raw ((type), (regnum), (from), (to))
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extern void i386_register_convert_to_raw (struct type *type, int regnum,
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char *from, char *to);
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/* Print out the i387 floating point state. */
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#ifdef HAVE_I387_REGS
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extern void i387_float_info (void);
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#define FLOAT_INFO { i387_float_info (); }
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#endif
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#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
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i386_push_arguments ((nargs), (args), (sp), (struct_return), (struct_addr))
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extern CORE_ADDR i386_push_arguments (int nargs, struct value **args,
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CORE_ADDR sp, int struct_return,
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CORE_ADDR struct_addr);
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/* Store the address of the place in which to copy the structure the
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subroutine will return. This is called from call_function. */
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#define STORE_STRUCT_RETURN(addr, sp) \
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i386_store_struct_return ((addr), (sp))
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extern void i386_store_struct_return (CORE_ADDR addr, CORE_ADDR sp);
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/* Extract from an array REGBUF containing the (raw) register state
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a function return value of type TYPE, and copy that, in virtual format,
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into VALBUF. */
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#define EXTRACT_RETURN_VALUE(type, regbuf, valbuf) \
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i386_extract_return_value ((type), (regbuf), (valbuf))
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extern void i386_extract_return_value (struct type *type, char *regbuf,
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char *valbuf);
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/* Write into the appropriate registers a function return value stored
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in VALBUF of type TYPE, given in virtual format. */
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#define STORE_RETURN_VALUE(type, valbuf) \
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i386_store_return_value ((type), (valbuf))
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extern void i386_store_return_value (struct type *type, char *valbuf);
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/* Extract from an array REGBUF containing the (raw) register state
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the address in which a function should return its structure value,
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as a CORE_ADDR. */
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#define EXTRACT_STRUCT_VALUE_ADDRESS(regbuf) \
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i386_extract_struct_value_address ((regbuf))
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extern CORE_ADDR i386_extract_struct_value_address (char *regbuf);
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/* The following redefines make backtracing through sigtramp work.
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They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp
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from the sigcontext structure which is pushed by the kernel on the
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user stack, along with a pointer to it. */
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/* Return the chain-pointer for FRAME. In the case of the i386, the
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frame's nominal address is the address of a 4-byte word containing
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the calling frame's address. */
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#define FRAME_CHAIN(frame) i386_frame_chain ((frame))
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extern CORE_ADDR i386_frame_chain (struct frame_info *frame);
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/* Determine whether the function invocation represented by FRAME does
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not have a from on the stack associated with it. If it does not,
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return non-zero, otherwise return zero. */
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#define FRAMELESS_FUNCTION_INVOCATION(frame) \
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i386_frameless_function_invocation (frame)
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extern int i386_frameless_function_invocation (struct frame_info *frame);
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/* Return the saved program counter for FRAME. */
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#define FRAME_SAVED_PC(frame) i386_frame_saved_pc (frame)
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extern CORE_ADDR i386_frame_saved_pc (struct frame_info *frame);
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#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
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#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
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/* Return number of args passed to a frame. Can return -1, meaning no way
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to tell, which is typical now that the C compiler delays popping them. */
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#define FRAME_NUM_ARGS(fi) (i386_frame_num_args(fi))
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extern int i386_frame_num_args (struct frame_info *);
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/* Return number of bytes at start of arglist that are not really args. */
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#define FRAME_ARGS_SKIP 8
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/* Put here the code to store, into a struct frame_saved_regs,
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the addresses of the saved registers of frame described by FRAME_INFO.
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This includes special registers such as pc and fp saved in special
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ways in the stack frame. sp is even more special:
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the address we return for it IS the sp for the next frame. */
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extern void i386_frame_init_saved_regs (struct frame_info *);
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#define FRAME_INIT_SAVED_REGS(FI) i386_frame_init_saved_regs (FI)
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/* Things needed for making the inferior call functions. */
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/* "An argument's size is increased, if necessary, to make it a
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multiple of [32 bit] words. This may require tail padding,
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depending on the size of the argument" - from the x86 ABI. */
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#define PARM_BOUNDARY 32
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/* Push an empty stack frame, to record the current PC, etc. */
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#define PUSH_DUMMY_FRAME { i386_push_dummy_frame (); }
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extern void i386_push_dummy_frame (void);
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/* Discard from the stack the innermost frame, restoring all registers. */
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#define POP_FRAME { i386_pop_frame (); }
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extern void i386_pop_frame (void);
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/* this is
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* call 11223344 (32 bit relative)
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* int3
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*/
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#define CALL_DUMMY { 0x223344e8, 0xcc11 }
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#define CALL_DUMMY_LENGTH 8
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#define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */
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#define CALL_DUMMY_BREAKPOINT_OFFSET 5
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/* Insert the specified number of args and function address
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into a call sequence of the above form stored at DUMMYNAME. */
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#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
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i386_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
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extern void i386_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
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int nargs, struct value **args,
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struct type *type, int gcc_p);
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/* FIXME: kettenis/2000-06-12: These do not belong here. */
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extern void print_387_control_word (unsigned int);
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extern void print_387_status_word (unsigned int);
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/* Offset from SP to first arg on stack at first instruction of a function */
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#define SP_ARG0 (1 * 4)
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#endif /* ifndef TM_I386_H */
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