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

/* Common target dependent code for GDB on ARM systems.
   Copyright (C) 2002, 2003, 2007, 2008, 2009, 2010
   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_D0_REGNUM,		/* VFP double-precision registers.  */
  ARM_D31_REGNUM = ARM_D0_REGNUM + 31,

  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?  */
  int have_vfp_registers;	/* Does the target report the VFP registers?  */
  int have_vfp_pseudos;		/* Are we synthesizing the single precision
				   VFP registers?  */
  int have_neon_pseudos;	/* Are we synthesizing the quad precision
				   NEON registers?  Requires
				   have_vfp_pseudos.  */
  int have_neon;		/* Do we have a NEON unit?  */

  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 a Thumb insn.  */
  int thumb_breakpoint_size;	/* And its size.  */

  /* If the Thumb breakpoint is an undefined instruction (which is
     affected by IT blocks) rather than a BKPT instruction (which is
     not), then we need a 32-bit Thumb breakpoint to preserve the
     instruction count in IT blocks.  */
  const char *thumb2_breakpoint;
  int thumb2_breakpoint_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;

  /* ISA-specific data types.  */
  struct type *arm_ext_type;
  struct type *neon_double_type;
  struct type *neon_quad_type;
};

/* Structures used for displaced stepping.  */

/* The maximum number of temporaries available for displaced instructions.  */
#define DISPLACED_TEMPS			16
/* The maximum number of modified instructions generated for one single-stepped
   instruction, including the breakpoint (usually at the end of the instruction
   sequence) and any scratch words, etc.  */
#define DISPLACED_MODIFIED_INSNS	8

struct displaced_step_closure
{
  ULONGEST tmp[DISPLACED_TEMPS];
  int rd;
  int wrote_to_pc;
  union
  {
    struct
    {
      int xfersize;
      int rn;			   /* Writeback register.  */
      unsigned int immed : 1;      /* Offset is immediate.  */
      unsigned int writeback : 1;  /* Perform base-register writeback.  */
      unsigned int restore_r4 : 1; /* Used r4 as scratch.  */
    } ldst;

    struct
    {
      unsigned long dest;
      unsigned int link : 1;
      unsigned int exchange : 1;
      unsigned int cond : 4;
    } branch;

    struct
    {
      unsigned int regmask;
      int rn;
      CORE_ADDR xfer_addr;
      unsigned int load : 1;
      unsigned int user : 1;
      unsigned int increment : 1;
      unsigned int before : 1;
      unsigned int writeback : 1;
      unsigned int cond : 4;
    } block;

    struct
    {
      unsigned int immed : 1;
    } preload;

    struct
    {
      /* If non-NULL, override generic SVC handling (e.g. for a particular
         OS).  */
      int (*copy_svc_os) (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
			  struct regcache *regs,
			  struct displaced_step_closure *dsc);
    } svc;
  } u;
  unsigned long modinsn[DISPLACED_MODIFIED_INSNS];
  int numinsns;
  CORE_ADDR insn_addr;
  CORE_ADDR scratch_base;
  void (*cleanup) (struct gdbarch *, struct regcache *,
		   struct displaced_step_closure *);
};

/* Values for the WRITE_PC argument to displaced_write_reg.  If the register
   write may write to the PC, specifies the way the CPSR T bit, etc. is
   modified by the instruction.  */

enum pc_write_style
{
  BRANCH_WRITE_PC,
  BX_WRITE_PC,
  LOAD_WRITE_PC,
  ALU_WRITE_PC,
  CANNOT_WRITE_PC
};

extern void
  arm_process_displaced_insn (struct gdbarch *gdbarch, uint32_t insn,
			      CORE_ADDR from, CORE_ADDR to,
			      struct regcache *regs,
			      struct displaced_step_closure *dsc);
extern void
  arm_displaced_init_closure (struct gdbarch *gdbarch, CORE_ADDR from,
			      CORE_ADDR to, struct displaced_step_closure *dsc);
extern ULONGEST
  displaced_read_reg (struct regcache *regs, CORE_ADDR from, int regno);
extern void
  displaced_write_reg (struct regcache *regs,
		       struct displaced_step_closure *dsc, int regno,
		       ULONGEST val, enum pc_write_style write_pc);

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 *);

extern struct displaced_step_closure *
  arm_displaced_step_copy_insn (struct gdbarch *, CORE_ADDR, CORE_ADDR,
				struct regcache *);
extern void arm_displaced_step_fixup (struct gdbarch *,
				      struct displaced_step_closure *,
				      CORE_ADDR, CORE_ADDR, struct regcache *);

/* 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.
4c38e0a4 JB	2	Copyright (C) 2002, 2003, 2007, 2008, 2009, 2010
4c38e0a4 JB	3	Free Software Foundation, Inc.
34e8f22d RE	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
a9762ec7	9	the Free Software Foundation; either version 3 of the License, or
34e8f22d RE	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
a9762ec7	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
34e8f22d	19
47ccd048 MK	20	#ifndef ARM_TDEP_H
	21	#define ARM_TDEP_H
	22
cb587d83	23	/* Forward declarations. */
47ccd048	24	struct gdbarch;
cb587d83 DJ	25	struct regset;
cb587d83 DJ	26
7157eed4	27	/* Register numbers of various important registers. */
34e8f22d	28
47a73475 MS	29	enum gdb_regnum {
	30	ARM_A1_REGNUM = 0, /* first integer-like argument */
	31	ARM_A4_REGNUM = 3, /* last integer-like argument */
	32	ARM_AP_REGNUM = 11,
4be43953	33	ARM_IP_REGNUM = 12,
47a73475 MS	34	ARM_SP_REGNUM = 13, /* Contains address of top of stack */
	35	ARM_LR_REGNUM = 14, /* address to return to from a function call */
	36	ARM_PC_REGNUM = 15, /* Contains program counter */
	37	ARM_F0_REGNUM = 16, /* first floating point register */
	38	ARM_F3_REGNUM = 19, /* last floating point argument register */
	39	ARM_F7_REGNUM = 23, /* last floating point register */
	40	ARM_FPS_REGNUM = 24, /* floating point status register */
	41	ARM_PS_REGNUM = 25, /* Contains processor status */
ff6f572f DJ	42	ARM_WR0_REGNUM, /* WMMX data registers. */
	43	ARM_WR15_REGNUM = ARM_WR0_REGNUM + 15,
	44	ARM_WC0_REGNUM, /* WMMX control registers. */
	45	ARM_WCSSF_REGNUM = ARM_WC0_REGNUM + 2,
	46	ARM_WCASF_REGNUM = ARM_WC0_REGNUM + 3,
	47	ARM_WC7_REGNUM = ARM_WC0_REGNUM + 7,
	48	ARM_WCGR0_REGNUM, /* WMMX general purpose registers. */
	49	ARM_WCGR3_REGNUM = ARM_WCGR0_REGNUM + 3,
	50	ARM_WCGR7_REGNUM = ARM_WCGR0_REGNUM + 7,
58d6951d DJ	51	ARM_D0_REGNUM, /* VFP double-precision registers. */
58d6951d DJ	52	ARM_D31_REGNUM = ARM_D0_REGNUM + 31,
ff6f572f DJ	53
	54	ARM_NUM_REGS,
	55
	56	/* Other useful registers. */
47a73475 MS	57	ARM_FP_REGNUM = 11, /* Frame register in ARM code, if used. */
	58	THUMB_FP_REGNUM = 7, /* Frame register in Thumb code, if used. */
	59	ARM_NUM_ARG_REGS = 4,
	60	ARM_LAST_ARG_REGNUM = ARM_A4_REGNUM,
	61	ARM_NUM_FP_ARG_REGS = 4,
	62	ARM_LAST_FP_ARG_REGNUM = ARM_F3_REGNUM
	63	};
34e8f22d	64
34e8f22d	65	/* Size of integer registers. */
7a5ea0d4	66	#define INT_REGISTER_SIZE 4
34e8f22d RE	67
	68	/* Say how long FP registers are. Used for documentation purposes and
	69	code readability in this header. IEEE extended doubles are 80
	70	bits. DWORD aligned they use 96 bits. */
7a5ea0d4	71	#define FP_REGISTER_SIZE 12
34e8f22d	72
34e8f22d	73	/* Number of machine registers. The only define actually required
f57d151a	74	is gdbarch_num_regs. The other definitions are used for documentation
34e8f22d RE	75	purposes and code readability. */
	76	/* For 26 bit ARM code, a fake copy of the PC is placed in register 25 (PS)
	77	(and called PS for processor status) so the status bits can be cleared
	78	from the PC (register 15). For 32 bit ARM code, a copy of CPSR is placed
	79	in PS. */
	80	#define NUM_FREGS 8 /* Number of floating point registers. */
	81	#define NUM_SREGS 2 /* Number of status registers. */
	82	#define NUM_GREGS 16 /* Number of general purpose registers. */
	83
	84
	85	/* Instruction condition field values. */
	86	#define INST_EQ 0x0
	87	#define INST_NE 0x1
	88	#define INST_CS 0x2
	89	#define INST_CC 0x3
	90	#define INST_MI 0x4
	91	#define INST_PL 0x5
	92	#define INST_VS 0x6
	93	#define INST_VC 0x7
	94	#define INST_HI 0x8
	95	#define INST_LS 0x9
	96	#define INST_GE 0xa
	97	#define INST_LT 0xb
	98	#define INST_GT 0xc
	99	#define INST_LE 0xd
	100	#define INST_AL 0xe
	101	#define INST_NV 0xf
	102
	103	#define FLAG_N 0x80000000
	104	#define FLAG_Z 0x40000000
	105	#define FLAG_C 0x20000000
	106	#define FLAG_V 0x10000000
	107
b39cc962 DJ	108	#define CPSR_T 0x20
b39cc962 DJ	109
08216dd7 RE	110	/* Type of floating-point code in use by inferior. There are really 3 models
	111	that are traditionally supported (plus the endianness issue), but gcc can
	112	only generate 2 of those. The third is APCS_FLOAT, where arguments to
	113	functions are passed in floating-point registers.
	114
fd50bc42 RE	115	In addition to the traditional models, VFP adds two more.
	116
	117	If you update this enum, don't forget to update fp_model_strings in
	118	arm-tdep.c. */
08216dd7 RE	119
	120	enum arm_float_model
	121	{
fd50bc42 RE	122	ARM_FLOAT_AUTO, /* Automatic detection. Do not set in tdep. */
	123	ARM_FLOAT_SOFT_FPA, /* Traditional soft-float (mixed-endian on LE ARM). */
	124	ARM_FLOAT_FPA, /* FPA co-processor. GCC calling convention. */
	125	ARM_FLOAT_SOFT_VFP, /* Soft-float with pure-endian doubles. */
	126	ARM_FLOAT_VFP, /* Full VFP calling convention. */
	127	ARM_FLOAT_LAST /* Keep at end. */
08216dd7 RE	128	};
08216dd7 RE	129
28e97307 DJ	130	/* ABI used by the inferior. */
	131	enum arm_abi_kind
	132	{
	133	ARM_ABI_AUTO,
	134	ARM_ABI_APCS,
	135	ARM_ABI_AAPCS,
	136	ARM_ABI_LAST
	137	};
fd50bc42	138
7c00367c MK	139	/* Convention for returning structures. */
	140
	141	enum struct_return
	142	{
	143	pcc_struct_return, /* Return "short" structures in memory. */
	144	reg_struct_return /* Return "short" structures in registers. */
	145	};
	146
97e03143 RE	147	/* Target-dependent structure in gdbarch. */
	148	struct gdbarch_tdep
	149	{
28e97307 DJ	150	/* The ABI for this architecture. It should never be set to
	151	ARM_ABI_AUTO. */
	152	enum arm_abi_kind arm_abi;
	153
08216dd7 RE	154	enum arm_float_model fp_model; /* Floating point calling conventions. */
08216dd7 RE	155
ff6f572f	156	int have_fpa_registers; /* Does the target report the FPA registers? */
58d6951d DJ	157	int have_vfp_registers; /* Does the target report the VFP registers? */
	158	int have_vfp_pseudos; /* Are we synthesizing the single precision
	159	VFP registers? */
	160	int have_neon_pseudos; /* Are we synthesizing the quad precision
	161	NEON registers? Requires
	162	have_vfp_pseudos. */
	163	int have_neon; /* Do we have a NEON unit? */
ff6f572f	164
97e03143 RE	165	CORE_ADDR lowest_pc; /* Lowest address at which instructions
97e03143 RE	166	will appear. */
9df628e0 RE	167
	168	const char arm_breakpoint; / Breakpoint pattern for an ARM insn. */
	169	int arm_breakpoint_size; /* And its size. */
177321bd	170	const char thumb_breakpoint; / Breakpoint pattern for a Thumb insn. */
9df628e0 RE	171	int thumb_breakpoint_size; /* And its size. */
9df628e0 RE	172
177321bd DJ	173	/* If the Thumb breakpoint is an undefined instruction (which is
	174	affected by IT blocks) rather than a BKPT instruction (which is
	175	not), then we need a 32-bit Thumb breakpoint to preserve the
	176	instruction count in IT blocks. */
	177	const char *thumb2_breakpoint;
	178	int thumb2_breakpoint_size;
	179
9df628e0 RE	180	int jb_pc; /* Offset to PC value in jump buffer.
	181	If this is negative, longjmp support
	182	will be disabled. */
	183	size_t jb_elt_size; /* And the size of each entry in the buf. */
cb587d83	184
7c00367c MK	185	/* Convention for returning structures. */
	186	enum struct_return struct_return;
	187
cb587d83 DJ	188	/* Cached core file helpers. */
cb587d83 DJ	189	struct regset gregset, fpregset;
27067745 UW	190
	191	/* ISA-specific data types. */
	192	struct type *arm_ext_type;
58d6951d DJ	193	struct type *neon_double_type;
58d6951d DJ	194	struct type *neon_quad_type;
97e03143 RE	195	};
97e03143 RE	196
cca44b1b JB	197	/* Structures used for displaced stepping. */
	198
	199	/* The maximum number of temporaries available for displaced instructions. */
	200	#define DISPLACED_TEMPS 16
	201	/* The maximum number of modified instructions generated for one single-stepped
	202	instruction, including the breakpoint (usually at the end of the instruction
	203	sequence) and any scratch words, etc. */
	204	#define DISPLACED_MODIFIED_INSNS 8
	205
	206	struct displaced_step_closure
	207	{
	208	ULONGEST tmp[DISPLACED_TEMPS];
	209	int rd;
	210	int wrote_to_pc;
	211	union
	212	{
	213	struct
	214	{
	215	int xfersize;
	216	int rn; /* Writeback register. */
	217	unsigned int immed : 1; /* Offset is immediate. */
	218	unsigned int writeback : 1; /* Perform base-register writeback. */
	219	unsigned int restore_r4 : 1; /* Used r4 as scratch. */
	220	} ldst;
	221
	222	struct
	223	{
	224	unsigned long dest;
	225	unsigned int link : 1;
	226	unsigned int exchange : 1;
	227	unsigned int cond : 4;
	228	} branch;
	229
	230	struct
	231	{
	232	unsigned int regmask;
	233	int rn;
	234	CORE_ADDR xfer_addr;
	235	unsigned int load : 1;
	236	unsigned int user : 1;
	237	unsigned int increment : 1;
	238	unsigned int before : 1;
	239	unsigned int writeback : 1;
	240	unsigned int cond : 4;
	241	} block;
	242
	243	struct
	244	{
	245	unsigned int immed : 1;
	246	} preload;
	247
	248	struct
	249	{
	250	/* If non-NULL, override generic SVC handling (e.g. for a particular
	251	OS). */
	252	int (copy_svc_os) (struct gdbarch gdbarch, uint32_t insn, CORE_ADDR to,
	253	struct regcache *regs,
	254	struct displaced_step_closure *dsc);
	255	} svc;
	256	} u;
	257	unsigned long modinsn[DISPLACED_MODIFIED_INSNS];
	258	int numinsns;
	259	CORE_ADDR insn_addr;
	260	CORE_ADDR scratch_base;
261	void (cleanup) (struct gdbarch , struct regcache *,
262	struct displaced_step_closure *);
263	};
264
265	/* Values for the WRITE_PC argument to displaced_write_reg. If the register
266	write may write to the PC, specifies the way the CPSR T bit, etc. is
267	modified by the instruction. */
268
269	enum pc_write_style
270	{
271	BRANCH_WRITE_PC,
272	BX_WRITE_PC,
273	LOAD_WRITE_PC,
274	ALU_WRITE_PC,
275	CANNOT_WRITE_PC
276	};
277
278	extern void
279	arm_process_displaced_insn (struct gdbarch *gdbarch, uint32_t insn,
280	CORE_ADDR from, CORE_ADDR to,
281	struct regcache *regs,
282	struct displaced_step_closure *dsc);
283	extern void
284	arm_displaced_init_closure (struct gdbarch *gdbarch, CORE_ADDR from,
285	CORE_ADDR to, struct displaced_step_closure *dsc);
286	extern ULONGEST
287	displaced_read_reg (struct regcache *regs, CORE_ADDR from, int regno);
288	extern void
289	displaced_write_reg (struct regcache *regs,
290	struct displaced_step_closure *dsc, int regno,
291	ULONGEST val, enum pc_write_style write_pc);
7c00367c	292
6dc13412	293	CORE_ADDR arm_skip_stub (struct frame_info *, CORE_ADDR);
daddc3c1	294	CORE_ADDR arm_get_next_pc (struct frame_info *, CORE_ADDR);
0b1b3e42	295	int arm_software_single_step (struct frame_info *);
190dce09	296
cca44b1b JB	297	extern struct displaced_step_closure *
	298	arm_displaced_step_copy_insn (struct gdbarch *, CORE_ADDR, CORE_ADDR,
	299	struct regcache *);
	300	extern void arm_displaced_step_fixup (struct gdbarch *,
	301	struct displaced_step_closure *,
	302	CORE_ADDR, CORE_ADDR, struct regcache *);
	303
47ccd048 MK	304	/* Functions exported from armbsd-tdep.h. */
	305
	306	/* Return the appropriate register set for the core section identified
	307	by SECT_NAME and SECT_SIZE. */
	308
	309	extern const struct regset *
	310	armbsd_regset_from_core_section (struct gdbarch *gdbarch,
	311	const char *sect_name, size_t sect_size);
	312
	313	#endif /* arm-tdep.h */