binutils-gdb/gdb/ppc-tdep.h

/* Target-dependent code for GDB, the GNU debugger.

   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
   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., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.  */

#ifndef PPC_TDEP_H
#define PPC_TDEP_H

struct gdbarch;
struct frame_info;
struct value;
struct regcache;
struct type;

/* From ppc-linux-tdep.c... */
enum return_value_convention ppc_sysv_abi_return_value (struct gdbarch *gdbarch,
							struct type *valtype,
							struct regcache *regcache,
							gdb_byte *readbuf,
							const gdb_byte *writebuf);
enum return_value_convention ppc_sysv_abi_broken_return_value (struct gdbarch *gdbarch,
							       struct type *valtype,
							       struct regcache *regcache,
							       gdb_byte *readbuf,
							       const gdb_byte *writebuf);
CORE_ADDR ppc_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
					struct value *function,
					struct regcache *regcache,
					CORE_ADDR bp_addr, int nargs,
					struct value **args, CORE_ADDR sp,
					int struct_return,
					CORE_ADDR struct_addr);
CORE_ADDR ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
					  struct value *function,
					  struct regcache *regcache,
					  CORE_ADDR bp_addr, int nargs,
					  struct value **args, CORE_ADDR sp,
					  int struct_return,
					  CORE_ADDR struct_addr);
CORE_ADDR ppc64_sysv_abi_adjust_breakpoint_address (struct gdbarch *gdbarch,
						    CORE_ADDR bpaddr);
int ppc_linux_memory_remove_breakpoint (CORE_ADDR addr,
					gdb_byte *contents_cache);
struct link_map_offsets *ppc_linux_svr4_fetch_link_map_offsets (void);
void ppc_linux_supply_gregset (struct regcache *regcache,
			       int regnum, const void *gregs, size_t size,
			       int wordsize);
void ppc_linux_supply_fpregset (const struct regset *regset,
				struct regcache *regcache,
				int regnum, const void *gregs, size_t size);

enum return_value_convention ppc64_sysv_abi_return_value (struct gdbarch *gdbarch,
							  struct type *valtype,
							  struct regcache *regcache,
							  gdb_byte *readbuf,
							  const gdb_byte *writebuf);

/* From rs6000-tdep.c... */
int altivec_register_p (int regno);
int spe_register_p (int regno);

/* Return non-zero if the architecture described by GDBARCH has
   floating-point registers (f0 --- f31 and fpscr).  */
int ppc_floating_point_unit_p (struct gdbarch *gdbarch);

/* Register set description.  */

struct ppc_reg_offsets
{
  /* General-purpose registers.  */
  int r0_offset;
  int pc_offset;
  int ps_offset;
  int cr_offset;
  int lr_offset;
  int ctr_offset;
  int xer_offset;
  int mq_offset;

  /* Floating-point registers.  */
  int f0_offset;
  int fpscr_offset;

  /* AltiVec registers.  */
  int vr0_offset;
  int vscr_offset;
  int vrsave_offset;
};

/* Supply register REGNUM in the general-purpose register set REGSET
   from the buffer specified by GREGS and LEN to register cache
   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

extern void ppc_supply_gregset (const struct regset *regset,
				struct regcache *regcache,
				int regnum, const void *gregs, size_t len);

/* Supply register REGNUM in the floating-point register set REGSET
   from the buffer specified by FPREGS and LEN to register cache
   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

extern void ppc_supply_fpregset (const struct regset *regset,
				 struct regcache *regcache,
				 int regnum, const void *fpregs, size_t len);

/* Collect register REGNUM in the general-purpose register set
   REGSET. from register cache REGCACHE into the buffer specified by
   GREGS and LEN.  If REGNUM is -1, do this for all registers in
   REGSET.  */

extern void ppc_collect_gregset (const struct regset *regset,
				 const struct regcache *regcache,
				 int regnum, void *gregs, size_t len);

/* Collect register REGNUM in the floating-point register set
   REGSET. from register cache REGCACHE into the buffer specified by
   FPREGS and LEN.  If REGNUM is -1, do this for all registers in
   REGSET.  */

extern void ppc_collect_fpregset (const struct regset *regset,
				  const struct regcache *regcache,
				  int regnum, void *fpregs, size_t len);

/* Private data that this module attaches to struct gdbarch. */

struct gdbarch_tdep
  {
    int wordsize;              /* size in bytes of fixed-point word */
    const struct reg *regs;    /* from current variant */
    int ppc_gp0_regnum;		/* GPR register 0 */
    int ppc_toc_regnum;		/* TOC register */
    int ppc_ps_regnum;	        /* Processor (or machine) status (%msr) */
    int ppc_cr_regnum;		/* Condition register */
    int ppc_lr_regnum;		/* Link register */
    int ppc_ctr_regnum;		/* Count register */
    int ppc_xer_regnum;		/* Integer exception register */

    /* Not all PPC and RS6000 variants will have the registers
       represented below.  A -1 is used to indicate that the register
       is not present in this variant.  */

    /* Floating-point registers.  */
    int ppc_fp0_regnum;         /* floating-point register 0 */
    int ppc_fpscr_regnum;	/* fp status and condition register */

    /* Segment registers.  */
    int ppc_sr0_regnum;         /* segment register 0 */

    /* Multiplier-Quotient Register (older POWER architectures only).  */
    int ppc_mq_regnum;

    /* Altivec registers.  */
    int ppc_vr0_regnum;		/* First AltiVec register */
    int ppc_vrsave_regnum;	/* Last AltiVec register */

    /* SPE registers.  */
    int ppc_ev0_upper_regnum;   /* First GPR upper half register */
    int ppc_ev0_regnum;         /* First ev register */
    int ppc_ev31_regnum;        /* Last ev register */
    int ppc_acc_regnum;         /* SPE 'acc' register */
    int ppc_spefscr_regnum;     /* SPE 'spefscr' register */

    /* Offset to ABI specific location where link register is saved.  */
    int lr_frame_offset;	

    /* An array of integers, such that sim_regno[I] is the simulator
       register number for GDB register number I, or -1 if the
       simulator does not implement that register.  */
    int *sim_regno;
};


/* Constants for register set sizes.  */
enum
  {
    ppc_num_gprs = 32,          /* 32 general-purpose registers */
    ppc_num_fprs = 32,          /* 32 floating-point registers */
    ppc_num_srs = 16,           /* 16 segment registers */
    ppc_num_vrs = 32            /* 32 Altivec vector registers */
  };


/* Constants for SPR register numbers.  These are *not* GDB register
   numbers: they are the numbers used in the PowerPC ISA itself to
   refer to these registers.

   This table includes all the SPRs from all the variants I could find
   documentation for.

   There may be registers from different PowerPC variants assigned the
   same number, but that's fine: GDB and the SIM always use the
   numbers in the context of a particular variant, so it's not
   ambiguous.

   We need to deviate from the naming pattern when variants have
   special-purpose registers of the same name, but with different
   numbers.  Fortunately, this is rare: look below to see how we
   handle the 'tcr' registers on the 403/403GX and 602.  */

enum
  {
    ppc_spr_mq        =    0,
    ppc_spr_xer       =    1,
    ppc_spr_rtcu      =    4,
    ppc_spr_rtcl      =    5,
    ppc_spr_lr        =    8,
    ppc_spr_ctr       =    9,
    ppc_spr_cnt       =    9,
    ppc_spr_dsisr     =   18,
    ppc_spr_dar       =   19,
    ppc_spr_dec       =   22,
    ppc_spr_sdr1      =   25,
    ppc_spr_srr0      =   26,
    ppc_spr_srr1      =   27,
    ppc_spr_eie       =   80,
    ppc_spr_eid       =   81,
    ppc_spr_nri       =   82,
    ppc_spr_sp        =  102,
    ppc_spr_cmpa      =  144,
    ppc_spr_cmpb      =  145,
    ppc_spr_cmpc      =  146,
    ppc_spr_cmpd      =  147,
    ppc_spr_icr       =  148,
    ppc_spr_der       =  149,
    ppc_spr_counta    =  150,
    ppc_spr_countb    =  151,
    ppc_spr_cmpe      =  152,
    ppc_spr_cmpf      =  153,
    ppc_spr_cmpg      =  154,
    ppc_spr_cmph      =  155,
    ppc_spr_lctrl1    =  156,
    ppc_spr_lctrl2    =  157,
    ppc_spr_ictrl     =  158,
    ppc_spr_bar       =  159,
    ppc_spr_vrsave    =  256,
    ppc_spr_sprg0     =  272,
    ppc_spr_sprg1     =  273,
    ppc_spr_sprg2     =  274,
    ppc_spr_sprg3     =  275,
    ppc_spr_asr       =  280,
    ppc_spr_ear       =  282,
    ppc_spr_tbl       =  284,
    ppc_spr_tbu       =  285,
    ppc_spr_pvr       =  287,
    ppc_spr_spefscr   =  512,
    ppc_spr_ibat0u    =  528,
    ppc_spr_ibat0l    =  529,
    ppc_spr_ibat1u    =  530,
    ppc_spr_ibat1l    =  531,
    ppc_spr_ibat2u    =  532,
    ppc_spr_ibat2l    =  533,
    ppc_spr_ibat3u    =  534,
    ppc_spr_ibat3l    =  535,
    ppc_spr_dbat0u    =  536,
    ppc_spr_dbat0l    =  537,
    ppc_spr_dbat1u    =  538,
    ppc_spr_dbat1l    =  539,
    ppc_spr_dbat2u    =  540,
    ppc_spr_dbat2l    =  541,
    ppc_spr_dbat3u    =  542,
    ppc_spr_dbat3l    =  543,
    ppc_spr_ic_cst    =  560,
    ppc_spr_ic_adr    =  561,
    ppc_spr_ic_dat    =  562,
    ppc_spr_dc_cst    =  568,
    ppc_spr_dc_adr    =  569,
    ppc_spr_dc_dat    =  570,
    ppc_spr_dpdr      =  630,
    ppc_spr_dpir      =  631,
    ppc_spr_immr      =  638,
    ppc_spr_mi_ctr    =  784,
    ppc_spr_mi_ap     =  786,
    ppc_spr_mi_epn    =  787,
    ppc_spr_mi_twc    =  789,
    ppc_spr_mi_rpn    =  790,
    ppc_spr_mi_cam    =  816,
    ppc_spr_mi_ram0   =  817,
    ppc_spr_mi_ram1   =  818,
    ppc_spr_md_ctr    =  792,
    ppc_spr_m_casid   =  793,
    ppc_spr_md_ap     =  794,
    ppc_spr_md_epn    =  795,
    ppc_spr_m_twb     =  796,
    ppc_spr_md_twc    =  797,
    ppc_spr_md_rpn    =  798,
    ppc_spr_m_tw      =  799,
    ppc_spr_mi_dbcam  =  816,
    ppc_spr_mi_dbram0 =  817,
    ppc_spr_mi_dbram1 =  818,
    ppc_spr_md_dbcam  =  824,
    ppc_spr_md_cam    =  824,
    ppc_spr_md_dbram0 =  825,
    ppc_spr_md_ram0   =  825,
    ppc_spr_md_dbram1 =  826,
    ppc_spr_md_ram1   =  826,
    ppc_spr_ummcr0    =  936,
    ppc_spr_upmc1     =  937,
    ppc_spr_upmc2     =  938,
    ppc_spr_usia      =  939,
    ppc_spr_ummcr1    =  940,
    ppc_spr_upmc3     =  941,
    ppc_spr_upmc4     =  942,
    ppc_spr_zpr       =  944,
    ppc_spr_pid       =  945,
    ppc_spr_mmcr0     =  952,
    ppc_spr_pmc1      =  953,
    ppc_spr_sgr       =  953,
    ppc_spr_pmc2      =  954,
    ppc_spr_dcwr      =  954,
    ppc_spr_sia       =  955,
    ppc_spr_mmcr1     =  956,
    ppc_spr_pmc3      =  957,
    ppc_spr_pmc4      =  958,
    ppc_spr_sda       =  959,
    ppc_spr_tbhu      =  972,
    ppc_spr_tblu      =  973,
    ppc_spr_dmiss     =  976,
    ppc_spr_dcmp      =  977,
    ppc_spr_hash1     =  978,
    ppc_spr_hash2     =  979,
    ppc_spr_icdbdr    =  979,
    ppc_spr_imiss     =  980,
    ppc_spr_esr       =  980,
    ppc_spr_icmp      =  981,
    ppc_spr_dear      =  981,
    ppc_spr_rpa       =  982,
    ppc_spr_evpr      =  982,
    ppc_spr_cdbcr     =  983,
    ppc_spr_tsr       =  984,
    ppc_spr_602_tcr   =  984,
    ppc_spr_403_tcr   =  986,
    ppc_spr_ibr       =  986,
    ppc_spr_pit       =  987,
    ppc_spr_esasrr    =  988,
    ppc_spr_tbhi      =  988,
    ppc_spr_tblo      =  989,
    ppc_spr_srr2      =  990,
    ppc_spr_sebr      =  990,
    ppc_spr_srr3      =  991,
    ppc_spr_ser       =  991,
    ppc_spr_hid0      = 1008,
    ppc_spr_dbsr      = 1008,
    ppc_spr_hid1      = 1009,
    ppc_spr_iabr      = 1010,
    ppc_spr_dbcr      = 1010,
    ppc_spr_iac1      = 1012,
    ppc_spr_dabr      = 1013,
    ppc_spr_iac2      = 1013,
    ppc_spr_dac1      = 1014,
    ppc_spr_dac2      = 1015,
    ppc_spr_l2cr      = 1017,
    ppc_spr_dccr      = 1018,
    ppc_spr_ictc      = 1019,
    ppc_spr_iccr      = 1019,
    ppc_spr_thrm1     = 1020,
    ppc_spr_pbl1      = 1020,
    ppc_spr_thrm2     = 1021,
    ppc_spr_pbu1      = 1021,
    ppc_spr_thrm3     = 1022,
    ppc_spr_pbl2      = 1022,
    ppc_spr_fpecr     = 1022,
    ppc_spr_lt        = 1022,
    ppc_spr_pir       = 1023,
    ppc_spr_pbu2      = 1023
  };

/* Instruction size.  */
#define PPC_INSN_SIZE 4

/* Estimate for the maximum number of instrctions in a function epilogue.  */
#define PPC_MAX_EPILOGUE_INSTRUCTIONS  52

#endif /* ppc-tdep.h */