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

/* Common target dependent code for GDB on ARM systems.
   Copyright (C) 2002, 2003, 2007, 2008, 2009 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 3 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, see <http://www.gnu.org/licenses/>.  */

#ifndef ARM_TDEP_H
#define ARM_TDEP_H

/* Forward declarations.  */
struct gdbarch;
struct regset;

/* Register numbers of various important registers.  */

enum gdb_regnum {
  ARM_A1_REGNUM = 0,		/* first integer-like argument */
  ARM_A4_REGNUM = 3,		/* last integer-like argument */
  ARM_AP_REGNUM = 11,
  ARM_IP_REGNUM = 12,
  ARM_SP_REGNUM = 13,		/* Contains address of top of stack */
  ARM_LR_REGNUM = 14,		/* address to return to from a function call */
  ARM_PC_REGNUM = 15,		/* Contains program counter */
  ARM_F0_REGNUM = 16,		/* first floating point register */
  ARM_F3_REGNUM = 19,		/* last floating point argument register */
  ARM_F7_REGNUM = 23, 		/* last floating point register */
  ARM_FPS_REGNUM = 24,		/* floating point status register */
  ARM_PS_REGNUM = 25,		/* Contains processor status */
  ARM_WR0_REGNUM,		/* WMMX data registers.  */
  ARM_WR15_REGNUM = ARM_WR0_REGNUM + 15,
  ARM_WC0_REGNUM,		/* WMMX control registers.  */
  ARM_WCSSF_REGNUM = ARM_WC0_REGNUM + 2,
  ARM_WCASF_REGNUM = ARM_WC0_REGNUM + 3,
  ARM_WC7_REGNUM = ARM_WC0_REGNUM + 7,
  ARM_WCGR0_REGNUM,		/* WMMX general purpose registers.  */
  ARM_WCGR3_REGNUM = ARM_WCGR0_REGNUM + 3,
  ARM_WCGR7_REGNUM = ARM_WCGR0_REGNUM + 7,

  ARM_NUM_REGS,

  /* Other useful registers.  */
  ARM_FP_REGNUM = 11,		/* Frame register in ARM code, if used.  */
  THUMB_FP_REGNUM = 7,		/* Frame register in Thumb code, if used.  */
  ARM_NUM_ARG_REGS = 4, 
  ARM_LAST_ARG_REGNUM = ARM_A4_REGNUM,
  ARM_NUM_FP_ARG_REGS = 4,
  ARM_LAST_FP_ARG_REGNUM = ARM_F3_REGNUM
};

/* Size of integer registers.  */
#define INT_REGISTER_SIZE		4

/* Say how long FP registers are.  Used for documentation purposes and
   code readability in this header.  IEEE extended doubles are 80
   bits.  DWORD aligned they use 96 bits.  */
#define FP_REGISTER_SIZE	12

/* Number of machine registers.  The only define actually required 
   is gdbarch_num_regs.  The other definitions are used for documentation
   purposes and code readability.  */
/* For 26 bit ARM code, a fake copy of the PC is placed in register 25 (PS)
   (and called PS for processor status) so the status bits can be cleared
   from the PC (register 15).  For 32 bit ARM code, a copy of CPSR is placed
   in PS.  */
#define NUM_FREGS	8	/* Number of floating point registers.  */
#define NUM_SREGS	2	/* Number of status registers.  */
#define NUM_GREGS	16	/* Number of general purpose registers.  */


/* Instruction condition field values.  */
#define INST_EQ		0x0
#define INST_NE		0x1
#define INST_CS		0x2
#define INST_CC		0x3
#define INST_MI		0x4
#define INST_PL		0x5
#define INST_VS		0x6
#define INST_VC		0x7
#define INST_HI		0x8
#define INST_LS		0x9
#define INST_GE		0xa
#define INST_LT		0xb
#define INST_GT		0xc
#define INST_LE		0xd
#define INST_AL		0xe
#define INST_NV		0xf

#define FLAG_N		0x80000000
#define FLAG_Z		0x40000000
#define FLAG_C		0x20000000
#define FLAG_V		0x10000000

#define CPSR_T		0x20

/* Type of floating-point code in use by inferior.  There are really 3 models
   that are traditionally supported (plus the endianness issue), but gcc can
   only generate 2 of those.  The third is APCS_FLOAT, where arguments to
   functions are passed in floating-point registers.  

   In addition to the traditional models, VFP adds two more. 

   If you update this enum, don't forget to update fp_model_strings in 
   arm-tdep.c.  */

enum arm_float_model
{
  ARM_FLOAT_AUTO,	/* Automatic detection.  Do not set in tdep.  */
  ARM_FLOAT_SOFT_FPA,	/* Traditional soft-float (mixed-endian on LE ARM).  */
  ARM_FLOAT_FPA,	/* FPA co-processor.  GCC calling convention.  */
  ARM_FLOAT_SOFT_VFP,	/* Soft-float with pure-endian doubles.  */
  ARM_FLOAT_VFP,	/* Full VFP calling convention.  */
  ARM_FLOAT_LAST	/* Keep at end.  */
};

/* ABI used by the inferior.  */
enum arm_abi_kind
{
  ARM_ABI_AUTO,
  ARM_ABI_APCS,
  ARM_ABI_AAPCS,
  ARM_ABI_LAST
};

/* Convention for returning structures.  */

enum struct_return
{
  pcc_struct_return,		/* Return "short" structures in memory.  */
  reg_struct_return		/* Return "short" structures in registers.  */
};

/* Target-dependent structure in gdbarch.  */
struct gdbarch_tdep
{
  /* The ABI for this architecture.  It should never be set to
     ARM_ABI_AUTO.  */
  enum arm_abi_kind arm_abi;

  enum arm_float_model fp_model; /* Floating point calling conventions.  */

  int have_fpa_registers;	/* Does the target report the FPA registers?  */

  CORE_ADDR lowest_pc;		/* Lowest address at which instructions 
				   will appear.  */

  const char *arm_breakpoint;	/* Breakpoint pattern for an ARM insn.  */
  int arm_breakpoint_size;	/* And its size.  */
  const char *thumb_breakpoint;	/* Breakpoint pattern for an ARM insn.  */
  int thumb_breakpoint_size;	/* And its size.  */

  int jb_pc;			/* Offset to PC value in jump buffer. 
				   If this is negative, longjmp support
				   will be disabled.  */
  size_t jb_elt_size;		/* And the size of each entry in the buf.  */

  /* Convention for returning structures.  */
  enum struct_return struct_return;

  /* Cached core file helpers.  */
  struct regset *gregset, *fpregset;
};


CORE_ADDR arm_skip_stub (struct frame_info *, CORE_ADDR);
CORE_ADDR arm_get_next_pc (struct frame_info *, CORE_ADDR);
int arm_software_single_step (struct frame_info *);

/* Functions exported from armbsd-tdep.h.  */

/* Return the appropriate register set for the core section identified
   by SECT_NAME and SECT_SIZE.  */

extern const struct regset *
  armbsd_regset_from_core_section (struct gdbarch *gdbarch,
				   const char *sect_name, size_t sect_size);

#endif /* arm-tdep.h */
Commit	Line	Data
34e8f22d	1	/* Common target dependent code for GDB on ARM systems.
0fb0cc75	2	Copyright (C) 2002, 2003, 2007, 2008, 2009 Free Software Foundation, Inc.
34e8f22d RE	3
	4	This file is part of GDB.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
a9762ec7	8	the Free Software Foundation; either version 3 of the License, or
34e8f22d RE	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
a9762ec7	17	along with this program. If not, see <http://www.gnu.org/licenses/>. */
34e8f22d	18
47ccd048 MK	19	#ifndef ARM_TDEP_H
	20	#define ARM_TDEP_H
	21
cb587d83	22	/* Forward declarations. */
47ccd048	23	struct gdbarch;
cb587d83 DJ	24	struct regset;
cb587d83 DJ	25
7157eed4	26	/* Register numbers of various important registers. */
34e8f22d	27
47a73475 MS	28	enum gdb_regnum {
	29	ARM_A1_REGNUM = 0, /* first integer-like argument */
	30	ARM_A4_REGNUM = 3, /* last integer-like argument */
	31	ARM_AP_REGNUM = 11,
4be43953	32	ARM_IP_REGNUM = 12,
47a73475 MS	33	ARM_SP_REGNUM = 13, /* Contains address of top of stack */
	34	ARM_LR_REGNUM = 14, /* address to return to from a function call */
	35	ARM_PC_REGNUM = 15, /* Contains program counter */
	36	ARM_F0_REGNUM = 16, /* first floating point register */
	37	ARM_F3_REGNUM = 19, /* last floating point argument register */
	38	ARM_F7_REGNUM = 23, /* last floating point register */
	39	ARM_FPS_REGNUM = 24, /* floating point status register */
	40	ARM_PS_REGNUM = 25, /* Contains processor status */
ff6f572f DJ	41	ARM_WR0_REGNUM, /* WMMX data registers. */
	42	ARM_WR15_REGNUM = ARM_WR0_REGNUM + 15,
	43	ARM_WC0_REGNUM, /* WMMX control registers. */
	44	ARM_WCSSF_REGNUM = ARM_WC0_REGNUM + 2,
	45	ARM_WCASF_REGNUM = ARM_WC0_REGNUM + 3,
	46	ARM_WC7_REGNUM = ARM_WC0_REGNUM + 7,
	47	ARM_WCGR0_REGNUM, /* WMMX general purpose registers. */
	48	ARM_WCGR3_REGNUM = ARM_WCGR0_REGNUM + 3,
	49	ARM_WCGR7_REGNUM = ARM_WCGR0_REGNUM + 7,
	50
	51	ARM_NUM_REGS,
	52
	53	/* Other useful registers. */
47a73475 MS	54	ARM_FP_REGNUM = 11, /* Frame register in ARM code, if used. */
	55	THUMB_FP_REGNUM = 7, /* Frame register in Thumb code, if used. */
	56	ARM_NUM_ARG_REGS = 4,
	57	ARM_LAST_ARG_REGNUM = ARM_A4_REGNUM,
	58	ARM_NUM_FP_ARG_REGS = 4,
	59	ARM_LAST_FP_ARG_REGNUM = ARM_F3_REGNUM
	60	};
34e8f22d	61
34e8f22d	62	/* Size of integer registers. */
7a5ea0d4	63	#define INT_REGISTER_SIZE 4
34e8f22d RE	64
	65	/* Say how long FP registers are. Used for documentation purposes and
	66	code readability in this header. IEEE extended doubles are 80
	67	bits. DWORD aligned they use 96 bits. */
7a5ea0d4	68	#define FP_REGISTER_SIZE 12
34e8f22d	69
34e8f22d	70	/* Number of machine registers. The only define actually required
f57d151a	71	is gdbarch_num_regs. The other definitions are used for documentation
34e8f22d RE	72	purposes and code readability. */
	73	/* For 26 bit ARM code, a fake copy of the PC is placed in register 25 (PS)
	74	(and called PS for processor status) so the status bits can be cleared
	75	from the PC (register 15). For 32 bit ARM code, a copy of CPSR is placed
	76	in PS. */
	77	#define NUM_FREGS 8 /* Number of floating point registers. */
	78	#define NUM_SREGS 2 /* Number of status registers. */
	79	#define NUM_GREGS 16 /* Number of general purpose registers. */
	80
	81
	82	/* Instruction condition field values. */
	83	#define INST_EQ 0x0
	84	#define INST_NE 0x1
	85	#define INST_CS 0x2
	86	#define INST_CC 0x3
	87	#define INST_MI 0x4
	88	#define INST_PL 0x5
	89	#define INST_VS 0x6
	90	#define INST_VC 0x7
	91	#define INST_HI 0x8
	92	#define INST_LS 0x9
	93	#define INST_GE 0xa
	94	#define INST_LT 0xb
	95	#define INST_GT 0xc
	96	#define INST_LE 0xd
	97	#define INST_AL 0xe
	98	#define INST_NV 0xf
	99
	100	#define FLAG_N 0x80000000
	101	#define FLAG_Z 0x40000000
	102	#define FLAG_C 0x20000000
	103	#define FLAG_V 0x10000000
	104
b39cc962 DJ	105	#define CPSR_T 0x20
b39cc962 DJ	106
08216dd7 RE	107	/* Type of floating-point code in use by inferior. There are really 3 models
	108	that are traditionally supported (plus the endianness issue), but gcc can
	109	only generate 2 of those. The third is APCS_FLOAT, where arguments to
	110	functions are passed in floating-point registers.
	111
fd50bc42 RE	112	In addition to the traditional models, VFP adds two more.
	113
	114	If you update this enum, don't forget to update fp_model_strings in
	115	arm-tdep.c. */
08216dd7 RE	116
	117	enum arm_float_model
	118	{
fd50bc42 RE	119	ARM_FLOAT_AUTO, /* Automatic detection. Do not set in tdep. */
	120	ARM_FLOAT_SOFT_FPA, /* Traditional soft-float (mixed-endian on LE ARM). */
	121	ARM_FLOAT_FPA, /* FPA co-processor. GCC calling convention. */
	122	ARM_FLOAT_SOFT_VFP, /* Soft-float with pure-endian doubles. */
	123	ARM_FLOAT_VFP, /* Full VFP calling convention. */
	124	ARM_FLOAT_LAST /* Keep at end. */
08216dd7 RE	125	};
08216dd7 RE	126
28e97307 DJ	127	/* ABI used by the inferior. */
	128	enum arm_abi_kind
	129	{
	130	ARM_ABI_AUTO,
	131	ARM_ABI_APCS,
	132	ARM_ABI_AAPCS,
	133	ARM_ABI_LAST
	134	};
fd50bc42	135
7c00367c MK	136	/* Convention for returning structures. */
	137
	138	enum struct_return
	139	{
	140	pcc_struct_return, /* Return "short" structures in memory. */
	141	reg_struct_return /* Return "short" structures in registers. */
	142	};
	143
97e03143 RE	144	/* Target-dependent structure in gdbarch. */
	145	struct gdbarch_tdep
	146	{
28e97307 DJ	147	/* The ABI for this architecture. It should never be set to
	148	ARM_ABI_AUTO. */
	149	enum arm_abi_kind arm_abi;
	150
08216dd7 RE	151	enum arm_float_model fp_model; /* Floating point calling conventions. */
08216dd7 RE	152
ff6f572f DJ	153	int have_fpa_registers; /* Does the target report the FPA registers? */
ff6f572f DJ	154
97e03143 RE	155	CORE_ADDR lowest_pc; /* Lowest address at which instructions
97e03143 RE	156	will appear. */
9df628e0 RE	157
	158	const char arm_breakpoint; / Breakpoint pattern for an ARM insn. */
	159	int arm_breakpoint_size; /* And its size. */
	160	const char thumb_breakpoint; / Breakpoint pattern for an ARM insn. */
	161	int thumb_breakpoint_size; /* And its size. */
	162
	163	int jb_pc; /* Offset to PC value in jump buffer.
	164	If this is negative, longjmp support
	165	will be disabled. */
	166	size_t jb_elt_size; /* And the size of each entry in the buf. */
cb587d83	167
7c00367c MK	168	/* Convention for returning structures. */
	169	enum struct_return struct_return;
	170
cb587d83 DJ	171	/* Cached core file helpers. */
cb587d83 DJ	172	struct regset gregset, fpregset;
97e03143 RE	173	};
97e03143 RE	174
7c00367c	175
6dc13412	176	CORE_ADDR arm_skip_stub (struct frame_info *, CORE_ADDR);
daddc3c1	177	CORE_ADDR arm_get_next_pc (struct frame_info *, CORE_ADDR);
0b1b3e42	178	int arm_software_single_step (struct frame_info *);
190dce09	179
47ccd048 MK	180	/* Functions exported from armbsd-tdep.h. */
	181
	182	/* Return the appropriate register set for the core section identified
	183	by SECT_NAME and SECT_SIZE. */
	184
	185	extern const struct regset *
	186	armbsd_regset_from_core_section (struct gdbarch *gdbarch,
	187	const char *sect_name, size_t sect_size);
	188
	189	#endif /* arm-tdep.h */