gdb/config/rs6000/tm-rs6000.h

/* Parameters for target execution on an RS6000, for GDB, the GNU debugger.
   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1997
   Free Software Foundation, Inc.
   Contributed by IBM Corporation.

   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.  */

#define GDB_MULTI_ARCH 1

/* Minimum possible text address in AIX */

#define TEXT_SEGMENT_BASE	0x10000000

/* Load segment of a given pc value. */

#define	PC_LOAD_SEGMENT(PC)	pc_load_segment_name(PC)
extern char *pc_load_segment_name (CORE_ADDR);

/* AIX's assembler doesn't grok dollar signs in identifiers.
   So we use dots instead.  This item must be coordinated with G++. */
#undef CPLUS_MARKER
#define CPLUS_MARKER '.'

/* If PC is in some function-call trampoline code, return the PC
   where the function itself actually starts.  If not, return NULL.  */

#define	SKIP_TRAMPOLINE_CODE(pc)	rs6000_skip_trampoline_code (pc)
extern CORE_ADDR rs6000_skip_trampoline_code (CORE_ADDR);

/* Number of trap signals we need to skip over, once the inferior process
   starts running. */

#define	START_INFERIOR_TRAPS_EXPECTED	2

/* AIX has a couple of strange returns from wait().  */

#define CHILD_SPECIAL_WAITSTATUS(ourstatus, hoststatus) ( \
  /* "stop after load" status.  */ \
  (hoststatus) == 0x57c ? (ourstatus)->kind = TARGET_WAITKIND_LOADED, 1 : \
  \
  /* signal 0. I have no idea why wait(2) returns with this status word.  */ \
  /* It looks harmless. */ \
  (hoststatus) == 0x7f ? (ourstatus)->kind = TARGET_WAITKIND_SPURIOUS, 1 : \
  \
  /* A normal waitstatus.  Let the usual macros deal with it.  */ \
  0)

/* In xcoff, we cannot process line numbers when we see them. This is
   mainly because we don't know the boundaries of the include files. So,
   we postpone that, and then enter and sort(?) the whole line table at
   once, when we are closing the current symbol table in end_symtab(). */

#define	PROCESS_LINENUMBER_HOOK()	aix_process_linenos ()
extern void aix_process_linenos (void);

/* 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 FP0_REGNUM 32		/* Floating point register 0 */
#define FPLAST_REGNUM 63	/* Last floating point register */

/* These #defines are used to parse core files and talk to ptrace, so they
   must remain fixed.  */
#define	FIRST_UISA_SP_REGNUM 64	/* first special register number */
#define LAST_UISA_SP_REGNUM  70	/* last special register number */

/* convert a dbx stab register number (from `r' declaration) to a gdb REGNUM */

#define STAB_REG_TO_REGNUM(value)	(value)

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

#define INIT_FRAME_PC_FIRST(fromleaf, prev) \
  prev->pc = (fromleaf ? SAVED_PC_AFTER_CALL (prev->next) : \
	      prev->next ? FRAME_SAVED_PC (prev->next) : read_pc ());
#define INIT_FRAME_PC(fromleaf, prev)	/* nothing */

/* Default offset from SP where the LR is stored */
#define	DEFAULT_LR_SAVE 8

/* Usually a function pointer's representation is simply the address
   of the function. On the RS/6000 however, a function pointer is
   represented by a pointer to a TOC entry. This TOC entry contains
   three words, the first word is the address of the function, the
   second word is the TOC pointer (r2), and the third word is the
   static chain value.  Throughout GDB it is currently assumed that a
   function pointer contains the address of the function, which is not
   easy to fix.  In addition, the conversion of a function address to
   a function pointer would require allocation of a TOC entry in the
   inferior's memory space, with all its drawbacks.  To be able to
   call C++ virtual methods in the inferior (which are called via
   function pointers), find_function_addr uses this macro to get the
   function address from a function pointer.  */

#define CONVERT_FROM_FUNC_PTR_ADDR rs6000_convert_from_func_ptr_addr
extern CORE_ADDR rs6000_convert_from_func_ptr_addr (CORE_ADDR);

/* Flag for machine-specific stuff in shared files.  FIXME */
#define IBM6000_TARGET

/* RS6000/AIX does not support PT_STEP.  Has to be simulated.  */

#define SOFTWARE_SINGLE_STEP_P 1
extern void rs6000_software_single_step (unsigned int, int);
#define SOFTWARE_SINGLE_STEP(sig,bp_p) rs6000_software_single_step (sig, bp_p)

/* Notice when a new child process is started. */

#define TARGET_CREATE_INFERIOR_HOOK rs6000_create_inferior
extern void rs6000_create_inferior (int);

/* Hook in rs6000-tdep.c for determining the TOC address when
   calling functions in the inferior.  */

extern CORE_ADDR (*rs6000_find_toc_address_hook) (CORE_ADDR);

/* Hook in rs6000-tdep.c to set the current architecture when starting a
   child process. */

extern void (*rs6000_set_host_arch_hook) (int);