[deliverable/binutils-gdb.git] / gdb / i386-tdep.h

/* Target-dependent code for GDB, the GNU debugger.
   Copyright 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 I386_TDEP_H
#define I386_TDEP_H

/* GDB's i386 target supports both the 32-bit Intel Architecture
   (IA-32) and the 64-bit AMD x86-64 architecture.  Internally it uses
   a similar register layout for both.

   - General purpose registers
   - FPU data registers
   - FPU control registers
   - SSE data registers
   - SSE control register

   The general purpose registers for the x86-64 architecture are quite
   different from IA-32.  Therefore, the FP0_REGNUM target macro
   determines the register number at which the FPU data registers
   start.  The number of FPU data and control registers is the same
   for both architectures.  The number of SSE registers however,
   differs and is determined by the num_xmm_regs member of `struct
   gdbarch_tdep'.  */

/* ABI variants that we know about.  */
enum i386_abi
{
  I386_ABI_UNKNOWN = 0,

  /* ELF */
  I386_ABI_SVR4,		/* This is the default.  */
  I386_ABI_NETBSD,
  I386_ABI_LINUX,
  I386_ABI_HURD,
  I386_ABI_SOLARIS,
  I386_ABI_FREEBSD,

  I386_ABI_INVALID = -1
};

/* i386 architecture specific information.  */
struct gdbarch_tdep
{
  /* ABI.  */
  enum i386_abi abi;

  /* Number of SSE registers.  */
  int num_xmm_regs;
};

/* Floating-point registers.  */

#define FPU_REG_RAW_SIZE 10

/* All FPU control regusters (except for FIOFF and FOOFF) are 16-bit
   (at most) in the FPU, but are zero-extended to 32 bits in GDB's
   register cache.  */

/* "Generic" floating point control register.  */
#define FPC_REGNUM	(FP0_REGNUM + 8)

/* FPU control word.  */
#define FCTRL_REGNUM	FPC_REGNUM

/* FPU status word.  */
#define FSTAT_REGNUM	(FPC_REGNUM + 1)

/* FPU register tag word.  */
#define FTAG_REGNUM	(FPC_REGNUM + 2)

/* FPU instruction's code segment selector, called "FPU Instruction
   Pointer Selector" in the IA-32 manuals.  */
#define FISEG_REGNUM	(FPC_REGNUM + 3)

/* FPU instruction's offset within segment.  */
#define FIOFF_REGNUM	(FPC_REGNUM + 4)

/* FPU operand's data segment.  */
#define FOSEG_REGNUM	(FPC_REGNUM + 5)

/* FPU operand's offset within segment */
#define FOOFF_REGNUM	(FPC_REGNUM + 6)

/* FPU opcode, bottom eleven bits.  */
#define FOP_REGNUM	(FPC_REGNUM + 7)

/* Return non-zero if N corresponds to a FPU data registers.  */
#define FP_REGNUM_P(n)	(FP0_REGNUM <= (n) && (n) < FPC_REGNUM)

/* Return non-zero if N corresponds to a FPU control register.  */
#define FPC_REGNUM_P(n)	(FPC_REGNUM <= (n) && (n) < XMM0_REGNUM)

/* SSE registers.  */

/* First SSE data register.  */
#define XMM0_REGNUM	(FPC_REGNUM + 8)

/* SSE control/status register.  */
#define MXCSR_REGNUM \
  (XMM0_REGNUM + gdbarch_tdep (current_gdbarch)->num_xmm_regs)

/* Return non-zero if N corresponds to a SSE data register.  */
#define SSE_REGNUM_P(n) (XMM0_REGNUM <= (n) && (n) < MXCSR_REGNUM)

/* FIXME: kettenis/2001-11-24: Obsolete macro's.  */
#define FCS_REGNUM FISEG_REGNUM
#define FCOFF_REGNUM FIOFF_REGNUM
#define FDS_REGNUM FOSEG_REGNUM
#define FDOFF_REGNUM FOOFF_REGNUM
#define IS_FP_REGNUM(n) FP_REGNUM_P (n)
#define IS_FPU_CTRL_REGNUM(n) FPC_REGNUM_P (n)
#define IS_SSE_REGNUM(n) SSE_REGNUM_P (n)

void i386_gdbarch_register_os_abi (enum i386_abi,
				   void (*init_abi)(struct gdbarch_info,
						    struct gdbarch *));

#endif /* i386-tdep.h */
Commit	Line	Data
9a82579f JS	1	/* Target-dependent code for GDB, the GNU debugger.
	2	Copyright 2001
	3	Free Software Foundation, Inc.
	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 59 Temple Place - Suite 330,
	20	Boston, MA 02111-1307, USA. */
	21
	22	#ifndef I386_TDEP_H
	23	#define I386_TDEP_H
	24
96297dab MK	25	/* GDB's i386 target supports both the 32-bit Intel Architecture
	26	(IA-32) and the 64-bit AMD x86-64 architecture. Internally it uses
	27	a similar register layout for both.
	28
	29	- General purpose registers
	30	- FPU data registers
	31	- FPU control registers
	32	- SSE data registers
	33	- SSE control register
	34
	35	The general purpose registers for the x86-64 architecture are quite
	36	different from IA-32. Therefore, the FP0_REGNUM target macro
	37	determines the register number at which the FPU data registers
	38	start. The number of FPU data and control registers is the same
	39	for both architectures. The number of SSE registers however,
	40	differs and is determined by the num_xmm_regs member of `struct
	41	gdbarch_tdep'. */
	42
3ce1502b MK	43	/* ABI variants that we know about. */
	44	enum i386_abi
	45	{
	46	I386_ABI_UNKNOWN = 0,
	47
	48	/* ELF */
	49	I386_ABI_SVR4, /* This is the default. */
	50	I386_ABI_NETBSD,
	51	I386_ABI_LINUX,
	52	I386_ABI_HURD,
	53	I386_ABI_SOLARIS,
	54	I386_ABI_FREEBSD,
	55
	56	I386_ABI_INVALID = -1
	57	};
	58
96297dab MK	59	/* i386 architecture specific information. */
	60	struct gdbarch_tdep
	61	{
3ce1502b MK	62	/* ABI. */
3ce1502b MK	63	enum i386_abi abi;
d2a7c97a	64
96297dab MK	65	/* Number of SSE registers. */
	66	int num_xmm_regs;
	67	};
	68
	69	/* Floating-point registers. */
	70
9a82579f JS	71	#define FPU_REG_RAW_SIZE 10
9a82579f JS	72
96297dab MK	73	/* All FPU control regusters (except for FIOFF and FOOFF) are 16-bit
	74	(at most) in the FPU, but are zero-extended to 32 bits in GDB's
	75	register cache. */
	76
	77	/* "Generic" floating point control register. */
	78	#define FPC_REGNUM (FP0_REGNUM + 8)
	79
9a82579f	80	/* FPU control word. */
96297dab MK	81	#define FCTRL_REGNUM FPC_REGNUM
96297dab MK	82
9a82579f	83	/* FPU status word. */
96297dab MK	84	#define FSTAT_REGNUM (FPC_REGNUM + 1)
96297dab MK	85
9a82579f	86	/* FPU register tag word. */
96297dab MK	87	#define FTAG_REGNUM (FPC_REGNUM + 2)
	88
	89	/* FPU instruction's code segment selector, called "FPU Instruction
	90	Pointer Selector" in the IA-32 manuals. */
	91	#define FISEG_REGNUM (FPC_REGNUM + 3)
	92
	93	/* FPU instruction's offset within segment. */
	94	#define FIOFF_REGNUM (FPC_REGNUM + 4)
	95
9a82579f	96	/* FPU operand's data segment. */
96297dab MK	97	#define FOSEG_REGNUM (FPC_REGNUM + 5)
	98
	99	/* FPU operand's offset within segment */
	100	#define FOOFF_REGNUM (FPC_REGNUM + 6)
	101
9a82579f	102	/* FPU opcode, bottom eleven bits. */
96297dab	103	#define FOP_REGNUM (FPC_REGNUM + 7)
9a82579f	104
96297dab MK	105	/* Return non-zero if N corresponds to a FPU data registers. */
	106	#define FP_REGNUM_P(n) (FP0_REGNUM <= (n) && (n) < FPC_REGNUM)
	107
	108	/* Return non-zero if N corresponds to a FPU control register. */
	109	#define FPC_REGNUM_P(n) (FPC_REGNUM <= (n) && (n) < XMM0_REGNUM)
	110
	111	/* SSE registers. */
	112
	113	/* First SSE data register. */
	114	#define XMM0_REGNUM (FPC_REGNUM + 8)
	115
	116	/* SSE control/status register. */
	117	#define MXCSR_REGNUM \
	118	(XMM0_REGNUM + gdbarch_tdep (current_gdbarch)->num_xmm_regs)
	119
	120	/* Return non-zero if N corresponds to a SSE data register. */
	121	#define SSE_REGNUM_P(n) (XMM0_REGNUM <= (n) && (n) < MXCSR_REGNUM)
	122
	123	/* FIXME: kettenis/2001-11-24: Obsolete macro's. */
	124	#define FCS_REGNUM FISEG_REGNUM
	125	#define FCOFF_REGNUM FIOFF_REGNUM
	126	#define FDS_REGNUM FOSEG_REGNUM
	127	#define FDOFF_REGNUM FOOFF_REGNUM
	128	#define IS_FP_REGNUM(n) FP_REGNUM_P (n)
	129	#define IS_FPU_CTRL_REGNUM(n) FPC_REGNUM_P (n)
	130	#define IS_SSE_REGNUM(n) SSE_REGNUM_P (n)
9a82579f	131
3ce1502b MK	132	void i386_gdbarch_register_os_abi (enum i386_abi,
	133	void (*init_abi)(struct gdbarch_info,
	134	struct gdbarch *));
	135
96297dab	136	#endif /* i386-tdep.h */