tm-sparc.h

gdb that s ported for PXA270 processor. definitely helpful for people interested in embedded system

       || function_stab_type == N_STSYM \
       || function_stab_type == N_GSYM))

/* Sequence of bytes for breakpoint instruction (ta 1). */

extern const unsigned char *sparc_breakpoint_from_pc (CORE_ADDR *pc, int *len);
#define BREAKPOINT_FROM_PC(PC,LEN) sparc_breakpoint_from_pc ((PC), (LEN))

/* Register numbers of various important registers.
   Note that some of these values are "real" register numbers,
   and correspond to the general registers of the machine,
   and some are "phony" register numbers which are too large
   to be actual register numbers as far as the user is concerned
   but do serve to get the desired values when passed to read_register.  */

#define	G0_REGNUM 0		/* %g0 */
#define	G1_REGNUM 1		/* %g1 */
#define O0_REGNUM 8		/* %o0 */
#define	RP_REGNUM 15		/* Contains return address value, *before* \
				   any windows get switched.  */
#define	O7_REGNUM 15		/* Last local reg not saved on stack frame */
#define	L0_REGNUM 16		/* First local reg that's saved on stack frame
				   rather than in machine registers */
#define	I0_REGNUM 24		/* %i0 */
#define	I7_REGNUM 31		/* Last local reg saved on stack frame */
#define	PS_REGNUM 65		/* Contains processor status */
#define PS_FLAG_CARRY 0x100000	/* Carry bit in PS */
#define	WIM_REGNUM 66		/* Window Invalid Mask (not really supported) */
#define	TBR_REGNUM 67		/* Trap Base Register (not really supported) */
#define	FPS_REGNUM 70		/* Floating point status register */
#define	CPS_REGNUM 71		/* Coprocessor status register */

/* Writing to %g0 is a noop (not an error or exception or anything like
   that, however).  */

#define CANNOT_STORE_REGISTER(regno) ((regno) == G0_REGNUM)

/*
 * DEPRECATED_FRAME_CHAIN and FRAME_INFO definitions, collected here
 * for convenience.  */

#if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0)
/*
 * The following defines must go away for MULTI_ARCH.
 */

/* Describe the pointer in each stack frame to the previous stack frame
   (its caller).  */

/* DEPRECATED_FRAME_CHAIN takes a frame's nominal address and produces
   the frame's chain-pointer. */

/* We need to override DEPRECATED_GET_SAVED_REGISTER so that we can
   deal with the way outs change into ins in different frames.  */

void sparc_get_saved_register (char *raw_buffer,
			       int *optimized,
			       CORE_ADDR * addrp,
			       struct frame_info *frame,
			       int regnum, enum lval_type *lvalp);

#define DEPRECATED_GET_SAVED_REGISTER(RAW_BUFFER, OPTIMIZED, ADDRP, FRAME, REGNUM, LVAL) \
     sparc_get_saved_register (RAW_BUFFER, OPTIMIZED, ADDRP, \
			       FRAME, REGNUM, LVAL)

#define DEPRECATED_FRAME_INIT_SAVED_REGS(FP)	/*no-op */

#define DEPRECATED_INIT_EXTRA_FRAME_INFO(FROMLEAF, FCI) \
     sparc_init_extra_frame_info (FROMLEAF, FCI)
extern void sparc_init_extra_frame_info (int, struct frame_info *);

#define DEPRECATED_FRAME_CHAIN(THISFRAME) (sparc_frame_chain (THISFRAME))
extern CORE_ADDR sparc_frame_chain (struct frame_info *);

/* A macro that tells us whether the function invocation represented
   by FI does not have a frame on the stack associated with it.  If it
   does not, FRAMELESS is set to 1, else 0.  */

#define FRAMELESS_FUNCTION_INVOCATION(FI) \
     frameless_look_for_prologue (FI)

/* Where is the PC for a specific frame */

#define DEPRECATED_FRAME_SAVED_PC(FRAME) sparc_frame_saved_pc (FRAME)
extern CORE_ADDR sparc_frame_saved_pc (struct frame_info *);

/* If the argument is on the stack, it will be here.  */
#define FRAME_ARGS_ADDRESS(FI) (get_frame_base (FI))

#define FRAME_LOCALS_ADDRESS(FI) (get_frame_base (FI))

/* Set VAL to the number of args passed to frame described by FI.
   Can set VAL to -1, meaning no way to tell.  */

/* Return number of bytes at start of arglist that are not really args.  */

#define FRAME_ARGS_SKIP 68

#endif /* GDB_MULTI_ARCH */

#define	PRINT_EXTRA_FRAME_INFO(FI) \
     sparc_print_extra_frame_info (FI)
extern void sparc_print_extra_frame_info (struct frame_info *);

/* DEPRECATED_INIT_EXTRA_FRAME_INFO needs the PC to detect flat
   frames.  */

/* NOTE: cagney/2002-12-08: Add local declaration of
   init_frame_pc_noop() because it isn't possible to include
   "arch-utils.h" here.  */
extern CORE_ADDR init_frame_pc_noop (int fromleaf, struct frame_info *prev);
#define	DEPRECATED_INIT_FRAME_PC(FROMLEAF, PREV)	(init_frame_pc_noop (FROMLEAF, PREV))
#define DEPRECATED_INIT_FRAME_PC_FIRST(FROMLEAF, PREV) \
  ((FROMLEAF) ? DEPRECATED_SAVED_PC_AFTER_CALL ((PREV)->next) : \
	      (PREV)->next ? DEPRECATED_FRAME_SAVED_PC ((PREV)->next) : read_pc ())

/* Define other aspects of the stack frame.  */

/* The location of I0 w.r.t SP.  This is actually dependent on how the
   system's window overflow/underflow routines are written.  Most
   vendors save the L regs followed by the I regs (at the higher
   address).  Some vendors get it wrong.  */

#define	FRAME_SAVED_L0	0
#define	FRAME_SAVED_I0	(8 * REGISTER_RAW_SIZE (L0_REGNUM))

#define FRAME_STRUCT_ARGS_ADDRESS(FI) (get_frame_base (FI))

/* Things needed for making the inferior call functions.  */
/*
 * First of all, let me give my opinion of what the DUMMY_FRAME
 * actually looks like.
 *
 *               |                                 |
 *               |                                 |
 *               + - - - - - - - - - - - - - - - - +<-- fp (level 0)
 *               |                                 |
 *               |                                 |
 *               |                                 |
 *               |                                 |
 *               |  Frame of innermost program     |
 *               |           function              |
 *               |                                 |
 *               |                                 |
 *               |                                 |
 *               |                                 |
 *               |                                 |
 *               |---------------------------------|<-- sp (level 0), fp (c)
 *               |                                 |
 *     DUMMY     |             fp0-31              |
 *               |                                 |
 *               |             ------              |<-- fp - 0x80
 *     FRAME     |              g0-7               |<-- fp - 0xa0
 *               |              i0-7               |<-- fp - 0xc0
 *               |             other               |<-- fp - 0xe0
 *               |               ?                 |
 *               |               ?                 |
 *               |---------------------------------|<-- sp' = fp - 0x140
 *               |                                 |
 * xcution start |                                 |
 * sp' + 0x94 -->|        CALL_DUMMY (x code)      |
 *               |                                 |
 *               |                                 |
 *               |---------------------------------|<-- sp'' = fp - 0x200
 *               |  align sp to 8 byte boundary    |
 *               |     ==> args to fn <==          |
 *  Room for     |                                 |
 * i & l's + agg | CALL_DUMMY_STACK_ADJUST = 0x0x44|
 *               |---------------------------------|<-- final sp (variable)
 *               |                                 |
 *               |   Where function called will    |
 *               |           build frame.          |
 *               |                                 |
 *               |                                 |
 *
 *   I understand everything in this picture except what the space
 * between fp - 0xe0 and fp - 0x140 is used for.  Oh, and I don't
 * understand why there's a large chunk of CALL_DUMMY that never gets
 * executed (its function is superceeded by
 * DEPRECATED_PUSH_DUMMY_FRAME; they are designed to do the same
 * thing).
 *
 *   DEPRECATED_PUSH_DUMMY_FRAME saves the registers above sp' and
 * pushes the * register file stack down one.
 *
 *   call_function then writes CALL_DUMMY, pushes the args onto the
 * stack, and adjusts the stack pointer.
 
   call_function_by_hand then starts execution (in the middle of
   CALL_DUMMY, as directed by call_function).  */

#ifndef CALL_DUMMY
/* This sequence of words is the instructions

   00:   bc 10 00 01     mov  %g1, %fp
   04:   9d e3 80 00     save  %sp, %g0, %sp
   08:   bc 10 00 02     mov  %g2, %fp
   0c:   be 10 00 03     mov  %g3, %i7
   10:   da 03 a0 58     ld  [ %sp + 0x58 ], %o5
   14:   d8 03 a0 54     ld  [ %sp + 0x54 ], %o4
   18:   d6 03 a0 50     ld  [ %sp + 0x50 ], %o3
   1c:   d4 03 a0 4c     ld  [ %sp + 0x4c ], %o2
   20:   d2 03 a0 48     ld  [ %sp + 0x48 ], %o1
   24:   40 00 00 00     call  <fun>
   28:   d0 03 a0 44     ld  [ %sp + 0x44 ], %o0
   2c:   01 00 00 00     nop 
   30:   91 d0 20 01     ta  1
   34:   01 00 00 00     nop

   NOTES:
   * the first four instructions are necessary only on the simulator.
   * this is a multiple of 8 (not only 4) bytes.
   * the `call' insn is a relative, not an absolute call.
   * the `nop' at the end is needed to keep the trap from
     clobbering things (if NPC pointed to garbage instead).
 */

#if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0)
/*
 * The following defines must go away for MULTI_ARCH.
 */

#define CALL_DUMMY { 0xbc100001, 0x9de38000, 0xbc100002, 0xbe100003,	\
		     0xda03a058, 0xd803a054, 0xd603a050, 0xd403a04c,	\
		     0xd203a048, 0x40000000, 0xd003a044, 0x01000000,	\
		     0x91d02001, 0x01000000 }


/* Size of the call dummy in bytes. */

#define DEPRECATED_CALL_DUMMY_LENGTH 0x38

/* Offset within call dummy of first instruction to execute. */

#define DEPRECATED_CALL_DUMMY_START_OFFSET 0

/* Offset within CALL_DUMMY of the 'call' instruction. */

#define CALL_DUMMY_CALL_OFFSET (DEPRECATED_CALL_DUMMY_START_OFFSET + 0x24)

/* Offset within CALL_DUMMY of the 'ta 1' trap instruction. */

#define DEPRECATED_CALL_DUMMY_BREAKPOINT_OFFSET (DEPRECATED_CALL_DUMMY_START_OFFSET + 0x30)

#define DEPRECATED_CALL_DUMMY_STACK_ADJUST 68

/* Call dummy method (eg. on stack, at entry point, etc.) */

#define CALL_DUMMY_LOCATION ON_STACK

/* Method for detecting dummy frames.  */

#define DEPRECATED_PC_IN_CALL_DUMMY(PC, SP, FRAME_ADDRESS) \
     deprecated_pc_in_call_dummy_on_stack (PC, SP, FRAME_ADDRESS)

#endif /* GDB_MULTI_ARCH */

#endif /* CALL_DUMMY */

#if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0)
/*
 * The following defines must go away for MULTI_ARCH. 
 */

/* Insert the specified number of args and function address
   into a call sequence of the above form stored at DUMMYNAME.  */

#define DEPRECATED_FIX_CALL_DUMMY(DUMMYNAME, PC, FUN, NARGS, ARGS, TYPE, GCC_P) \
     sparc_fix_call_dummy (DUMMYNAME, PC, FUN, TYPE, GCC_P)
void sparc_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
			   struct type *value_type, int using_gcc);

/* Arguments smaller than an int must be promoted to ints when
   synthesizing function calls.  */

/* Push an empty stack frame, to record the current PC, etc.  */

#define DEPRECATED_PUSH_DUMMY_FRAME	sparc_push_dummy_frame ()
#define DEPRECATED_POP_FRAME		sparc_pop_frame ()

void sparc_push_dummy_frame (void);
void sparc_pop_frame (void);

#define DEPRECATED_PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
     sparc32_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)

extern CORE_ADDR sparc32_push_arguments (int, struct value **, CORE_ADDR, int,
					 CORE_ADDR);

/* Store the address of the place in which to copy the structure the
   subroutine will return.  This is called from call_function_by_hand. 
   The ultimate mystery is, tho, what is the value "16"?  */

#define STORE_STRUCT_RETURN(ADDR, SP) \
  { char val[4]; \
    store_unsigned_integer (val, 4, (ADDR)); \
    write_memory ((SP)+(16*4), val, 4); }

/* Default definition of USE_STRUCT_CONVENTION.  */

#ifndef USE_STRUCT_CONVENTION
#define USE_STRUCT_CONVENTION(GCC_P, TYPE) \
     generic_use_struct_convention (GCC_P, TYPE)
#endif

/* Extract from an array REGBUF containing the (raw) register state a
   function return value of type TYPE, and copy that, in virtual
   format, into VALBUF.  */

#define EXTRACT_RETURN_VALUE(TYPE, REGCACHE, VALBUF) \
     sparc32_extract_return_value (TYPE, REGCACHE, VALBUF)
extern void sparc32_extract_return_value (struct type *, struct regcache *,
					  void *valbuf);

#endif /* GDB_MULTI_ARCH */


/* Sparc has no reliable single step ptrace call */

#define SOFTWARE_SINGLE_STEP_P() 1
extern void sparc_software_single_step (enum target_signal, int);
#define SOFTWARE_SINGLE_STEP(sig,bp_p) sparc_software_single_step (sig,bp_p)

/* We need more arguments in a frame specification for the
   "frame" or "info frame" command.  */

#define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv)
extern struct frame_info *setup_arbitrary_frame (int, CORE_ADDR *);

extern void sparc_do_registers_info (int regnum, int all);
#undef DEPRECATED_DO_REGISTERS_INFO
#define DEPRECATED_DO_REGISTERS_INFO(REGNUM,ALL) sparc_do_registers_info (REGNUM, ALL)

/* Optimization for storing registers to the inferior.  The hook
   DO_DEFERRED_STORES
   actually executes any deferred stores.  It is called any time
   we are going to proceed the child, or read its registers.
   The hook CLEAR_DEFERRED_STORES is called when we want to throw
   away the inferior process, e.g. when it dies or we kill it.
   FIXME, this does not handle remote debugging cleanly.  */

extern int deferred_stores;
#define	DO_DEFERRED_STORES	\
  if (deferred_stores)		\
    target_store_registers (-2);
#define	CLEAR_DEFERRED_STORES	\
  deferred_stores = 0;

/* Select the sparc disassembler */

#define TM_PRINT_INSN_MACH bfd_mach_sparc

#define DEPRECATED_EXTRA_STACK_ALIGNMENT_NEEDED 1