481 lines
18 KiB
C
481 lines
18 KiB
C
/* 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
#ifndef TM_ALPHA_H
|
||
#define TM_ALPHA_H
|
||
|
||
#include "bfd.h"
|
||
#include "coff/sym.h" /* Needed for PDR below. */
|
||
#include "coff/symconst.h"
|
||
|
||
#ifdef __STDC__
|
||
struct frame_info;
|
||
struct type;
|
||
struct value;
|
||
struct symbol;
|
||
#endif
|
||
|
||
#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
|
||
|
||
/* 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)
|
||
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(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", "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 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 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)
|
||
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
|
||
|
||
|
||
/* 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 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. */
|
||
|
||
extern void alpha_find_saved_regs PARAMS ((struct frame_info *));
|
||
|
||
#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
|
||
do { \
|
||
if ((frame_info)->saved_regs == NULL) \
|
||
alpha_find_saved_regs (frame_info); \
|
||
(frame_saved_regs) = *(frame_info)->saved_regs; \
|
||
(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame; \
|
||
} while (0)
|
||
|
||
|
||
/* 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))
|
||
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
|
||
|
||
/* 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 PARAMS ((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 PARAMS ((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; \
|
||
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", \
|
||
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 PARAMS ((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 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 PARAMS ((struct frame_info *, CORE_ADDR));
|
||
|
||
#endif /* TM_ALPHA_H */
|