/* Definitions to make GDB run on an Alpha box under OSF1. This is
- also used by the Alpha/Netware and Alpha/Linux targets.
- Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000
+ also used by the Alpha GNU/Linux target.
+
+ Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2004, 2007
Free Software Foundation, Inc.
This file is part of GDB.
#ifndef TM_ALPHA_H
#define TM_ALPHA_H
-#include "regcache.h"
-#include "bfd.h"
-#include "coff/sym.h" /* Needed for PDR below. */
-#include "coff/symconst.h"
-
-struct frame_info;
-struct type;
-struct value;
-struct symbol;
-
-#if !defined (TARGET_BYTE_ORDER)
-#define TARGET_BYTE_ORDER LITTLE_ENDIAN
-#endif
-
-/* Redefine some target bit sizes from the default. */
-
-#define TARGET_LONG_BIT 64
-#define TARGET_LONG_LONG_BIT 64
-#define TARGET_PTR_BIT 64
-
-/* Floating point is IEEE compliant */
-#define IEEE_FLOAT (1)
-
-/* 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) (alpha_skip_prologue(pc, 0))
-extern CORE_ADDR alpha_skip_prologue (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)
-extern CORE_ADDR alpha_saved_pc_after_call (struct frame_info *);
-
-/* Are we currently handling a signal ? */
-
-#define IN_SIGTRAMP(pc, name) ((name) && STREQ ("__sigtramp", (name)))
-
-/* Stack grows downward. */
-
-#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
-
-#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. */
-
-#ifndef DECR_PC_AFTER_BREAK
-#define DECR_PC_AFTER_BREAK 4
-#endif
-
-/* Say how long (ordinary) registers are. This is a piece of bogosity
- used in push_word and a few other places; REGISTER_RAW_SIZE is the
- real way to know how big a register is. */
-
-#define REGISTER_SIZE 8
-
-/* 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", "fpcr",\
- "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 T7_REGNUM 8 /* Return address register for OSF/1 __add* */
-#define GCC_FP_REGNUM 15 /* Used by gcc as frame register */
-#define A0_REGNUM 16 /* Loc of first arg during a subr call */
-#define T9_REGNUM 23 /* Return address register for OSF/1 __div* */
-#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 FPCR_REGNUM 63 /* Floating point control register */
-#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 + 31)
-
-/* 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)
-extern void
-alpha_register_convert_to_virtual (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 (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+31) \
- ? 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 (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 (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) (CORE_ADDR) alpha_frame_chain (thisframe)
-extern CORE_ADDR alpha_frame_chain (struct frame_info *);
-
-/* Define other aspects of the stack frame. */
-
-
-/* An expression that tells us whether the function invocation represented
- by FI does not have a frame on the stack associated with it. */
-/* We handle this differently for alpha, and maybe we should not */
-
-#define FRAMELESS_FUNCTION_INVOCATION(FI) (0)
-
-/* Saved Pc. */
-
-#define FRAME_SAVED_PC(FRAME) (alpha_frame_saved_pc(FRAME))
-extern CORE_ADDR alpha_frame_saved_pc (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(fi) (-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. */
-
-extern void alpha_find_saved_regs (struct frame_info *);
-
-#define FRAME_INIT_SAVED_REGS(frame_info) \
- do { \
- if ((frame_info)->saved_regs == NULL) \
- alpha_find_saved_regs (frame_info); \
- (frame_info)->saved_regs[SP_REGNUM] = (frame_info)->frame; \
- } while (0)
-\f
-
-/* Things needed for making the inferior call functions. */
-
-#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
- (alpha_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr)))
-extern CORE_ADDR
-alpha_push_arguments (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 (void);
-
-/* Discard from the stack the innermost frame, restoring all registers. */
-
-#define POP_FRAME alpha_pop_frame()
-extern void alpha_pop_frame (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
-
-/* On the Alpha the call dummy code is never copied to user space,
- stopping the user call is achieved via a bp_call_dummy breakpoint.
- But 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 { 0 } /* Content doesn't matter. */
-
-#define CALL_DUMMY_START_OFFSET (0)
-
-#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
-
-extern CORE_ADDR alpha_call_dummy_address (void);
-#define CALL_DUMMY_ADDRESS() alpha_call_dummy_address()
-
-/* 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 = CALL_DUMMY_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__"
-extern void ecoff_relocate_efi (struct symbol *, CORE_ADDR);
-
-/* 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; \
- int pc_reg; \
- alpha_extra_func_info_t proc_desc;
-
-#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) init_extra_frame_info(fci)
-extern void init_extra_frame_info (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+%ld\n", \
- REGISTER_NAME (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)
-extern struct frame_info *setup_arbitrary_frame (int, CORE_ADDR *);
-
-/* This is used by heuristic_proc_start. It should be shot it the head. */
-#ifndef VM_MIN_ADDRESS
-#define VM_MIN_ADDRESS (CORE_ADDR)0x120000000
-#endif
-
-/* If PC is in a shared library trampoline code, return the PC
- where the function itself actually starts. If not, return 0. */
-#define SKIP_TRAMPOLINE_CODE(pc) find_solib_trampoline_target (pc)
-
-/* If the current gcc for for this target does not produce correct debugging
- information for float parameters, both prototyped and unprototyped, then
- define this macro. This forces gdb to always assume that floats are
- passed as doubles and then converted in the callee.
-
- For the alpha, it appears that the debug info marks the parameters as
- floats regardless of whether the function is prototyped, but the actual
- values are always passed in as doubles. Thus by setting this to 1, both
- types of calls will work. */
-
-#define COERCE_FLOAT_TO_DOUBLE(formal, actual) (1)
-
-/* Return TRUE if procedure descriptor PROC is a procedure descriptor
- that refers to a dynamically generated sigtramp function.
-
- OSF/1 doesn't use dynamic sigtramp functions, so this is always
- FALSE. */
-
-#define PROC_DESC_IS_DYN_SIGTRAMP(proc) (0)
-#define SET_PROC_DESC_IS_DYN_SIGTRAMP(proc)
-
-/* If PC is inside a dynamically generated sigtramp function, return
- how many bytes the program counter is beyond the start of that
- function. Otherwise, return a negative value.
-
- OSF/1 doesn't use dynamic sigtramp functions, so this always
- returns -1. */
-
-#define DYNAMIC_SIGTRAMP_OFFSET(pc) (-1)
-
-/* Translate a signal handler frame into the address of the sigcontext
- structure. */
-
-#define SIGCONTEXT_ADDR(frame) \
- (read_memory_integer ((frame)->next ? frame->next->frame : frame->frame, 8))
-
-/* If FRAME refers to a sigtramp frame, return the address of the next
- frame. */
-
-#define FRAME_PAST_SIGTRAMP_FRAME(frame, pc) \
- (alpha_osf_skip_sigtramp_frame (frame, pc))
-extern CORE_ADDR alpha_osf_skip_sigtramp_frame (struct frame_info *,
- CORE_ADDR);
+#define RA_REGNUM 26 /* XXXJRT needed by mdebugread.c */
#endif /* TM_ALPHA_H */
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