-/* Definitions to make GDB run on an Alpha box under OSF1.
- Copyright 1993 Free Software Foundation, Inc.
+/* Definitions to make GDB run on an Alpha box under OSF1. This is
+ also used by the Alpha GNU/Linux target.
-This file is part of GDB.
+ Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2004, 2007
+ Free Software Foundation, Inc.
-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 file is part of GDB.
-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.
+ 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.
-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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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.
-#include "bfd.h"
-#include "coff/sym.h" /* Needed for PDR below. */
-#include "coff/symconst.h"
+ 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. */
-#if !defined (TARGET_BYTE_ORDER)
-#define TARGET_BYTE_ORDER LITTLE_ENDIAN
-#endif
+#ifndef TM_ALPHA_H
+#define TM_ALPHA_H
-/* Redefine some target bit sizes from the default. */
+#define RA_REGNUM 26 /* XXXJRT needed by mdebugread.c */
-#define TARGET_LONG_BIT 64
-#define TARGET_LONG_LONG_BIT 64
-#define TARGET_PTR_BIT 64
-
-/* Floating point is IEEE compliant */
-#define IEEE_FLOAT
-
-/* Number of traps that happen between exec'ing the shell
- * to run an inferior, and when we finally get to
- * the inferior code. This is 2 on most implementations.
- */
-#define START_INFERIOR_TRAPS_EXPECTED 3
-
-/* Offset from address of function to start of its code.
- Zero on most machines. */
-
-#define FUNCTION_START_OFFSET 0
-
-/* Advance PC across any function entry prologue instructions
- to reach some "real" code. */
-
-#define SKIP_PROLOGUE(pc) pc = alpha_skip_prologue(pc, 0)
-extern CORE_ADDR alpha_skip_prologue PARAMS ((CORE_ADDR addr, int lenient));
-
-/* Immediately after a function call, return the saved pc.
- Can't always go through the frames for this because on some machines
- the new frame is not set up until the new function executes
- some instructions. */
-
-#define SAVED_PC_AFTER_CALL(frame) alpha_saved_pc_after_call(frame)
-#ifdef __STDC__
-struct frame_info;
-#endif
-extern CORE_ADDR
-alpha_saved_pc_after_call PARAMS ((struct frame_info *));
-
-/* Are we currently handling a signal ? */
-
-#define IN_SIGTRAMP(pc, name) ((name) && STREQ ("__sigtramp", (name)))
-
-/* Stack grows downward. */
-
-#define INNER_THAN <
-
-#define BREAKPOINT {0x80, 0, 0, 0} /* call_pal bpt */
-
-/* Amount PC must be decremented by after a breakpoint.
- This is often the number of bytes in BREAKPOINT
- but not always. */
-
-#define DECR_PC_AFTER_BREAK 4
-
-/* Nonzero if instruction at PC is a return instruction.
- "ret $zero,($ra),1" on alpha. */
-
-#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 4) == 0x6bfa8001)
-
-/* Return 1 if P points to an invalid floating point value. */
-
-#define INVALID_FLOAT(p,l) 0
-
-/* Say how long (all) registers are.
- This is unused for the alpha, but the define is necessary. */
-
-#define REGISTER_TYPE long
-
-/* Number of machine registers */
-
-#define NUM_REGS 66
-
-/* Initializer for an array of names of registers.
- There should be NUM_REGS strings in this initializer. */
-
-#define REGISTER_NAMES \
- { "v0", "t0", "t1", "t2", "t3", "t4", "t5", "t6", \
- "t7", "s0", "s1", "s2", "s3", "s4", "s5", "fp", \
- "a0", "a1", "a2", "a3", "a4", "a5", "t8", "t9", \
- "t10", "t11", "ra", "t12", "at", "gp", "sp", "zero", \
- "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
- "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
- "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\
- "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\
- "pc", "vfp", \
- }
-
-/* Register numbers of various important registers.
- Note that most of these values are "real" register numbers,
- and correspond to the general registers of the machine,
- and FP_REGNUM is a "phony" register number which is too large
- to be an actual register number as far as the user is concerned
- but serves to get the desired value when passed to read_register. */
-
-#define V0_REGNUM 0 /* Function integer return value */
-#define GCC_FP_REGNUM 15 /* Used by gcc as frame register */
-#define A0_REGNUM 16 /* Loc of first arg during a subr call */
-#define T12_REGNUM 27 /* Contains start addr of current proc */
-#define SP_REGNUM 30 /* Contains address of top of stack */
-#define RA_REGNUM 26 /* Contains return address value */
-#define ZERO_REGNUM 31 /* Read-only register, always 0 */
-#define FP0_REGNUM 32 /* Floating point register 0 */
-#define FPA0_REGNUM 48 /* First float arg during a subr call */
-#define PC_REGNUM 64 /* Contains program counter */
-#define FP_REGNUM 65 /* Virtual frame pointer */
-
-#define CANNOT_FETCH_REGISTER(regno) \
- ((regno) == FP_REGNUM || (regno) == ZERO_REGNUM)
-#define CANNOT_STORE_REGISTER(regno) \
- ((regno) == FP_REGNUM || (regno) == ZERO_REGNUM)
-
-/* Total amount of space needed to store our copies of the machine's
- register state, the array `registers'. */
-#define REGISTER_BYTES (NUM_REGS * 8)
-
-/* Index within `registers' of the first byte of the space for
- register N. */
-
-#define REGISTER_BYTE(N) ((N) * 8)
-
-/* Number of bytes of storage in the actual machine representation
- for register N. On Alphas, all regs are 8 bytes. */
-
-#define REGISTER_RAW_SIZE(N) 8
-
-/* Number of bytes of storage in the program's representation
- for register N. On Alphas, all regs are 8 bytes. */
-
-#define REGISTER_VIRTUAL_SIZE(N) 8
-
-/* Largest value REGISTER_RAW_SIZE can have. */
-
-#define MAX_REGISTER_RAW_SIZE 8
-
-/* Largest value REGISTER_VIRTUAL_SIZE can have. */
-
-#define MAX_REGISTER_VIRTUAL_SIZE 8
-
-/* Nonzero if register N requires conversion
- from raw format to virtual format.
- The alpha needs a conversion between register and memory format if
- the register is a floating point register and
- memory format is float, as the register format must be double
- or
- memory format is an integer with 4 bytes or less, as the representation
- of integers in floating point registers is different. */
-
-#define REGISTER_CONVERTIBLE(N) ((N) >= FP0_REGNUM && (N) < FP0_REGNUM + 32)
-
-/* Convert data from raw format for register REGNUM in buffer FROM
- to virtual format with type TYPE in buffer TO. */
-
-#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM, TYPE, FROM, TO) \
- alpha_register_convert_to_virtual (REGNUM, TYPE, FROM, TO)
-#ifdef __STDC__
-struct type;
-#endif
-extern void
-alpha_register_convert_to_virtual PARAMS ((int, struct type *, char *, char *));
-
-/* Convert data from virtual format with type TYPE in buffer FROM
- to raw format for register REGNUM in buffer TO. */
-
-#define REGISTER_CONVERT_TO_RAW(TYPE, REGNUM, FROM, TO) \
- alpha_register_convert_to_raw (TYPE, REGNUM, FROM, TO)
-extern void
-alpha_register_convert_to_raw PARAMS ((struct type *, int, char *, char *));
-
-/* Return the GDB type object for the "standard" data type
- of data in register N. */
-
-#define REGISTER_VIRTUAL_TYPE(N) \
- (((N) >= FP0_REGNUM && (N) < FP0_REGNUM+32) \
- ? builtin_type_double : builtin_type_long) \
-
-/* Store the address of the place in which to copy the structure the
- subroutine will return. Handled by alpha_push_arguments. */
-
-#define STORE_STRUCT_RETURN(addr, sp) /**/
-
-/* 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,REGBUF,VALBUF) \
- alpha_extract_return_value(TYPE, REGBUF, VALBUF)
-extern void
-alpha_extract_return_value PARAMS ((struct type *, char *, char *));
-
-/* Write into appropriate registers a function return value
- of type TYPE, given in virtual format. */
-
-#define STORE_RETURN_VALUE(TYPE,VALBUF) \
- alpha_store_return_value(TYPE, VALBUF)
-extern void
-alpha_store_return_value PARAMS ((struct type *, char *));
-
-/* Extract from an array REGBUF containing the (raw) register state
- the address in which a function should return its structure value,
- as a CORE_ADDR (or an expression that can be used as one). */
-/* The address is passed in a0 upon entry to the function, but when
- the function exits, the compiler has copied the value to v0. This
- convention is specified by the System V ABI, so I think we can rely
- on it. */
-
-#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
- (extract_address (REGBUF + REGISTER_BYTE (V0_REGNUM), \
- REGISTER_RAW_SIZE (V0_REGNUM)))
-
-/* Structures are returned by ref in extra arg0 */
-#define USE_STRUCT_CONVENTION(gcc_p, type) 1
-
-\f
-/* Describe the pointer in each stack frame to the previous stack frame
- (its caller). */
-
-/* FRAME_CHAIN takes a frame's nominal address
- and produces the frame's chain-pointer. */
-
-#define FRAME_CHAIN(thisframe) (FRAME_ADDR)alpha_frame_chain(thisframe)
-extern CORE_ADDR
-alpha_frame_chain PARAMS ((struct frame_info *));
-
-/* Define other aspects of the stack frame. */
-
-
-/* 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. */
-/* We handle this differently for alpha, and maybe we should not */
-
-#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) {(FRAMELESS) = 0;}
-
-/* Saved Pc. */
-
-#define FRAME_SAVED_PC(FRAME) (alpha_frame_saved_pc(FRAME))
-extern CORE_ADDR
-alpha_frame_saved_pc PARAMS ((struct frame_info *));
-
-/* The alpha has two different virtual pointers for arguments and locals.
-
- The virtual argument pointer is pointing to the bottom of the argument
- transfer area, which is located immediately below the virtual frame
- pointer. Its size is fixed for the native compiler, it is either zero
- (for the no arguments case) or large enough to hold all argument registers.
- gcc uses a variable sized argument transfer area. As it has
- to stay compatible with the native debugging tools it has to use the same
- virtual argument pointer and adjust the argument offsets accordingly.
-
- The virtual local pointer is localoff bytes below the virtual frame
- pointer, the value of localoff is obtained from the PDR. */
-
-#define ALPHA_NUM_ARG_REGS 6
-
-#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame - (ALPHA_NUM_ARG_REGS * 8))
-
-#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame - (fi)->localoff)
-
-/* Return number of args passed to a frame.
- Can return -1, meaning no way to tell. */
-
-#define FRAME_NUM_ARGS(num, fi) ((num) = -1)
-
-/* Return number of bytes at start of arglist that are not really args. */
-
-#define FRAME_ARGS_SKIP 0
-
-/* Put here the code to store, into a struct frame_saved_regs,
- the addresses of the saved registers of frame described by FRAME_INFO.
- This includes special registers such as pc and fp saved in special
- ways in the stack frame. sp is even more special:
- the address we return for it IS the sp for the next frame. */
-
-#define FRAME_FIND_SAVED_REGS(fi, frame_saved_regs) ( \
- (frame_saved_regs) = *(fi)->saved_regs, \
- (frame_saved_regs).regs[SP_REGNUM] = (fi)->frame)
-
-\f
-/* Things needed for making the inferior call functions. */
-
-#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
- sp = alpha_push_arguments(nargs, args, sp, struct_return, struct_addr)
-#ifdef __STDC__
-struct value;
-#endif
-extern CORE_ADDR
-alpha_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR));
-
-/* Push an empty stack frame, to record the current PC, etc. */
-
-#define PUSH_DUMMY_FRAME alpha_push_dummy_frame()
-extern void
-alpha_push_dummy_frame PARAMS ((void));
-
-/* Discard from the stack the innermost frame, restoring all registers. */
-
-#define POP_FRAME alpha_pop_frame()
-extern void
-alpha_pop_frame PARAMS ((void));
-
-/* Alpha OSF/1 inhibits execution of code on the stack.
- But there is no need for a dummy on the alpha. PUSH_ARGUMENTS
- takes care of all argument handling and bp_call_dummy takes care
- of stopping the dummy. */
-
-#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
-
-/* We need a fake CALL_DUMMY definition to enable the proper
- call_function_by_hand and to avoid zero length array warnings
- in valops.c */
-
-#define CALL_DUMMY {\
- 0x80, /* call_pal bpt */ \
-}
-
-#define CALL_DUMMY_START_OFFSET (0)
-
-#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
-
-/* Insert the specified number of args and function address
- into a call sequence of the above form stored at DUMMYNAME.
- We only have to set RA_REGNUM to the dummy breakpoint address
- and T12_REGNUM (the `procedure value register') to the function address. */
-
-#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
-{ \
- CORE_ADDR bp_address = entry_point_address (); \
- if (bp_address == 0) \
- error ("no place to put call"); \
- write_register (RA_REGNUM, bp_address); \
- write_register (T12_REGNUM, fun); \
-}
-
-/* There's a mess in stack frame creation. See comments in blockframe.c
- near reference to INIT_FRAME_PC_FIRST. */
-
-#define INIT_FRAME_PC(fromleaf, prev) /* nada */
-
-#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 ());
-
-/* Special symbol found in blocks associated with routines. We can hang
- alpha_extra_func_info_t's off of this. */
-
-#define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__"
-
-/* Specific information about a procedure.
- This overlays the ALPHA's PDR records,
- alpharead.c (ab)uses this to save memory */
-
-typedef struct alpha_extra_func_info {
- long numargs; /* number of args to procedure (was iopt) */
- PDR pdr; /* Procedure descriptor record */
-} *alpha_extra_func_info_t;
-
-/* Define the extra_func_info that mipsread.c needs.
- FIXME: We should define our own PDR interface, perhaps in a separate
- header file. This would get rid of the <bfd.h> inclusion in all sources
- and would abstract the mips/alpha interface from ecoff. */
-#define mips_extra_func_info alpha_extra_func_info
-#define mips_extra_func_info_t alpha_extra_func_info_t
-
-#define EXTRA_FRAME_INFO \
- int localoff; \
- alpha_extra_func_info_t proc_desc; \
- struct frame_saved_regs *saved_regs;
-
-#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) init_extra_frame_info(fci)
-extern void
-init_extra_frame_info PARAMS ((struct frame_info *));
-
-#define PRINT_EXTRA_FRAME_INFO(fi) \
- { \
- if (fi && fi->proc_desc && fi->proc_desc->pdr.framereg < NUM_REGS) \
- printf_filtered (" frame pointer is at %s+%d\n", \
- reg_names[fi->proc_desc->pdr.framereg], \
- fi->proc_desc->pdr.frameoffset); \
- }
-
-/* It takes two values to specify a frame on the ALPHA. Sigh.
-
- In fact, at the moment, the *PC* is the primary value that sets up
- a frame. The PC is looked up to see what function it's in; symbol
- information from that function tells us which register is the frame
- pointer base, and what offset from there is the "virtual frame pointer".
- (This is usually an offset from SP.) FIXME -- this should be cleaned
- up so that the primary value is the SP, and the PC is used to disambiguate
- multiple functions with the same SP that are at different stack levels. */
-
-#define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv)
-/* FIXME: Depends on equivalence between FRAME and "struct frame_info *",
- and equivalence between CORE_ADDR and FRAME_ADDR. */
-extern struct frame_info *setup_arbitrary_frame PARAMS ((int, CORE_ADDR *));
+#endif /* TM_ALPHA_H */
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