1993-03-23 01:19:58 +00:00
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/* Parameters for target machine Intel 960, for GDB, the GNU debugger.
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Copyright (C) 1990, 1991, 1993 Free Software Foundation, Inc.
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Contributed by Intel Corporation.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Definitions to target GDB to any i960. */
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#ifndef I80960
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#define I80960
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#endif
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/* Hook for the SYMBOL_CLASS of a parameter when decoding DBX symbol
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information. In the i960, parameters can be stored as locals or as
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args, depending on the type of the debug record.
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From empirical observation, gcc960 uses N_LSYM to indicate
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arguments passed in registers and then copied immediately
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to the frame, and N_PSYM to indicate arguments passed in a
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g14-relative argument block. */
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#define DBX_PARM_SYMBOL_CLASS(type) ((type == N_LSYM)? LOC_LOCAL_ARG: LOC_ARG)
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/* Byte order is configurable, but this machine runs little-endian. */
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#define TARGET_BYTE_ORDER LITTLE_ENDIAN
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/* We have IEEE floating point, if we have any float at all. */
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#define IEEE_FLOAT
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/* Offset from address of function to start of its code.
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Zero on most machines. */
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#define FUNCTION_START_OFFSET 0
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/* Advance ip across any function entry prologue instructions
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to reach some "real" code. */
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#define SKIP_PROLOGUE(ip) { ip = skip_prologue (ip); }
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extern CORE_ADDR skip_prologue ();
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/* Immediately after a function call, return the saved ip.
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Can't always go through the frames for this because on some machines
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the new frame is not set up until the new function
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executes some instructions. */
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#define SAVED_PC_AFTER_CALL(frame) (saved_pc_after_call (frame))
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extern CORE_ADDR saved_pc_after_call ();
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/* Stack grows upward */
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#define INNER_THAN >
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/* Nonzero if instruction at ip is a return instruction. */
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#define ABOUT_TO_RETURN(ip) (read_memory_integer(ip,4) == 0x0a000000)
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* valops.c (call_function_by_hand, push_word), defs.h (push_word),
convex-xdep.c, m88k-nat.c, i386m3-nat.c, mips-tdep.c, mipsm3-nat.c,
ns32km3-nat.c, remote-bug.c, m88k-tdep.c, remote-hms.c, remote-mips.c,
config/gould/tm-np1.h, hppa-tdep.c (hppa_fix_call_dummy), remote-vx.c:
Use REGISTER_SIZE, unsigned LONGEST, and
{store,extract}_unsigned_integer, instead of sizeof
(REGISTER_TYPE) and REGISTER_TYPE.
* All tm.h files: Change REGISTER_TYPE to REGISTER_SIZE.
* hppa-tdep.c (pa_print_fp_reg): Remove unused variable val.
* Makefile.in (ALLDEPFILES): Remove i386ly-nat.c and m68kly-nat.c.
Add lynx-nat.c.
1993-12-26 18:10:22 +00:00
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/* Say how long (ordinary) registers are. This is a piece of bogosity
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used in push_word and a few other places; REGISTER_RAW_SIZE is the
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real way to know how big a register is. */
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1993-03-23 01:19:58 +00:00
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* valops.c (call_function_by_hand, push_word), defs.h (push_word),
convex-xdep.c, m88k-nat.c, i386m3-nat.c, mips-tdep.c, mipsm3-nat.c,
ns32km3-nat.c, remote-bug.c, m88k-tdep.c, remote-hms.c, remote-mips.c,
config/gould/tm-np1.h, hppa-tdep.c (hppa_fix_call_dummy), remote-vx.c:
Use REGISTER_SIZE, unsigned LONGEST, and
{store,extract}_unsigned_integer, instead of sizeof
(REGISTER_TYPE) and REGISTER_TYPE.
* All tm.h files: Change REGISTER_TYPE to REGISTER_SIZE.
* hppa-tdep.c (pa_print_fp_reg): Remove unused variable val.
* Makefile.in (ALLDEPFILES): Remove i386ly-nat.c and m68kly-nat.c.
Add lynx-nat.c.
1993-12-26 18:10:22 +00:00
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#define REGISTER_SIZE 4
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1993-03-23 01:19:58 +00:00
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/* Number of machine registers */
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#define NUM_REGS 40
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/* Initializer for an array of names of registers.
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There should be NUM_REGS strings in this initializer. */
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#define REGISTER_NAMES { \
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/* 0 */ "pfp", "sp", "rip", "r3", "r4", "r5", "r6", "r7", \
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/* 8 */ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",\
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/* 16 */ "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", \
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/* 24 */ "g8", "g9", "g10", "g11", "g12", "g13", "g14", "fp", \
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/* 32 */ "pcw", "ac", "tc", "ip", "fp0", "fp1", "fp2", "fp3",\
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}
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/* Register numbers of various important registers (used to index
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into arrays of register names and register values). */
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#define R0_REGNUM 0 /* First local register */
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#define SP_REGNUM 1 /* Contains address of top of stack */
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#define RIP_REGNUM 2 /* Return instruction pointer (local r2) */
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#define R15_REGNUM 15 /* Last local register */
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#define G0_REGNUM 16 /* First global register */
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#define G13_REGNUM 29 /* g13 - holds struct return address */
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#define G14_REGNUM 30 /* g14 - ptr to arg block / leafproc return address */
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#define FP_REGNUM 31 /* Contains address of executing stack frame */
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#define PCW_REGNUM 32 /* process control word */
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#define ACW_REGNUM 33 /* arithmetic control word */
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#define TCW_REGNUM 34 /* trace control word */
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#define IP_REGNUM 35 /* instruction pointer */
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#define FP0_REGNUM 36 /* First floating point register */
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/* Some registers have more than one name */
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#define PC_REGNUM IP_REGNUM /* GDB refers to ip as the Program Counter */
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#define PFP_REGNUM R0_REGNUM /* Previous frame pointer */
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/* Total amount of space needed to store our copies of the machine's
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register state, the array `registers'. */
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#define REGISTER_BYTES ((36*4) + (4*10))
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/* Index within `registers' of the first byte of the space for register N. */
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#define REGISTER_BYTE(N) ( (N) < FP0_REGNUM ? \
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(4*(N)) : ((10*(N)) - (6*FP0_REGNUM)) )
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/* The i960 has register windows, sort of. */
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#define HAVE_REGISTER_WINDOWS
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/* Is this register part of the register window system? A yes answer
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implies that 1) The name of this register will not be the same in
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other frames, and 2) This register is automatically "saved" upon
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subroutine calls and thus there is no need to search more than one
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stack frame for it.
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On the i960, in fact, the name of this register in another frame is
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"mud" -- there is no overlap between the windows. Each window is
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simply saved into the stack (true for our purposes, after having been
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flushed; normally they reside on-chip and are restored from on-chip
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without ever going to memory). */
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#define REGISTER_IN_WINDOW_P(regnum) ((regnum) <= R15_REGNUM)
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/* Number of bytes of storage in the actual machine representation
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for register N. On the i960, all regs are 4 bytes except for floating
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point, which are 10. NINDY only sends us 8 byte values for these,
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which is a pain, but VxWorks handles this correctly, so we must. */
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#define REGISTER_RAW_SIZE(N) ( (N) < FP0_REGNUM ? 4 : 10 )
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/* Number of bytes of storage in the program's representation for register N. */
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#define REGISTER_VIRTUAL_SIZE(N) ( (N) < FP0_REGNUM ? 4 : 8 )
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/* Largest value REGISTER_RAW_SIZE can have. */
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#define MAX_REGISTER_RAW_SIZE 10
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#define MAX_REGISTER_VIRTUAL_SIZE 8
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/* Nonzero if register N requires conversion from raw format to virtual
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format. */
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#define REGISTER_CONVERTIBLE(N) ((N) >= FP0_REGNUM)
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1994-02-28 06:06:05 +00:00
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#include "floatformat.h"
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* findvar.c (value_of_register, value_from_register),
hppa-tdep.c (pa_print_fp_reg), infcmd.c (do_registers_info),
valops.c (value_assign): Use REGISTER_CONVERT_TO_* only if
REGISTER_CONVERTIBLE is defined, otherwise just copy the content.
Pass desired type to REGISTER_CONVERT_TO_*.
* config/m68k/tm-m68k.h, config/i960/tm-i960.h (REGISTER_CONVERT_*):
Pass length of desired type to store/extract_floating.
* config/i386/tm-arm.h, config/i386/tm-i386aix.h,
config/i386/tm-sun386.h, config/i386/tm-symmetry.h,
config/m88k/tm-m88k.h config/rs6000/tm-rs6000.h (REGISTER_CONVERT_*):
Use extract_floating and store_floating with length of desired type.
* config/m68k/tm-news.h (STORE,EXTRACT_RETURN_VALUE): Add type
parameter to REGISTER_CONVERT_*.
* config/a29k/tm-a29k.h, config/convex/tm-convex.h,
config/gould/tm-np1.h, config/gould/tm-pn.h, config/h8300/tm-h8300.h,
config/h8500/tm-h8500.h, config/i386/tm-i386v.h,
config/mips/tm-mips.h, config/ns32k/tm-merlin.h,
config/ns32k/tm-umax.h, config/pa/tm-hppa.h, config/pyr/tm-pyr.h,
config/sh/tm-sh.h, config/sparc/tm-sparc.h, config/tahoe/tm-tahoe.h,
config/vax/tm-vax.h, config/z8k/tm-z8k.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_RAW, REGISTER_CONVERT_TO_VIRTUAL): Remove
versions for which REGISTER_CONVERTIBLE is always false.
* z8k-tdep.c (register_convert_to_virtual, register_convert_to_raw):
Remove, no longer used.
* alpha-tdep.c (alpha_register_convert_to_raw,
alpha_register_convert_to_virtual): New routines to handle
the different raw formats in alpha floating point registers.
* config/alpha/tm-alpha.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_VIRTUAL, REGISTER_CONVERT_TO_RAW): Use them.
1993-11-02 21:51:10 +00:00
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/* Convert data from raw format for register REGNUM in buffer FROM
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to virtual format with type TYPE in buffer TO. */
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1993-03-23 01:19:58 +00:00
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* findvar.c (value_of_register, value_from_register),
hppa-tdep.c (pa_print_fp_reg), infcmd.c (do_registers_info),
valops.c (value_assign): Use REGISTER_CONVERT_TO_* only if
REGISTER_CONVERTIBLE is defined, otherwise just copy the content.
Pass desired type to REGISTER_CONVERT_TO_*.
* config/m68k/tm-m68k.h, config/i960/tm-i960.h (REGISTER_CONVERT_*):
Pass length of desired type to store/extract_floating.
* config/i386/tm-arm.h, config/i386/tm-i386aix.h,
config/i386/tm-sun386.h, config/i386/tm-symmetry.h,
config/m88k/tm-m88k.h config/rs6000/tm-rs6000.h (REGISTER_CONVERT_*):
Use extract_floating and store_floating with length of desired type.
* config/m68k/tm-news.h (STORE,EXTRACT_RETURN_VALUE): Add type
parameter to REGISTER_CONVERT_*.
* config/a29k/tm-a29k.h, config/convex/tm-convex.h,
config/gould/tm-np1.h, config/gould/tm-pn.h, config/h8300/tm-h8300.h,
config/h8500/tm-h8500.h, config/i386/tm-i386v.h,
config/mips/tm-mips.h, config/ns32k/tm-merlin.h,
config/ns32k/tm-umax.h, config/pa/tm-hppa.h, config/pyr/tm-pyr.h,
config/sh/tm-sh.h, config/sparc/tm-sparc.h, config/tahoe/tm-tahoe.h,
config/vax/tm-vax.h, config/z8k/tm-z8k.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_RAW, REGISTER_CONVERT_TO_VIRTUAL): Remove
versions for which REGISTER_CONVERTIBLE is always false.
* z8k-tdep.c (register_convert_to_virtual, register_convert_to_raw):
Remove, no longer used.
* alpha-tdep.c (alpha_register_convert_to_raw,
alpha_register_convert_to_virtual): New routines to handle
the different raw formats in alpha floating point registers.
* config/alpha/tm-alpha.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_VIRTUAL, REGISTER_CONVERT_TO_RAW): Use them.
1993-11-02 21:51:10 +00:00
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#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
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1993-03-23 01:19:58 +00:00
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{ \
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1993-10-29 18:16:33 +00:00
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double val; \
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1994-02-28 06:06:05 +00:00
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floatformat_to_double (&floatformat_i960_ext, (FROM), &val); \
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* findvar.c (value_of_register, value_from_register),
hppa-tdep.c (pa_print_fp_reg), infcmd.c (do_registers_info),
valops.c (value_assign): Use REGISTER_CONVERT_TO_* only if
REGISTER_CONVERTIBLE is defined, otherwise just copy the content.
Pass desired type to REGISTER_CONVERT_TO_*.
* config/m68k/tm-m68k.h, config/i960/tm-i960.h (REGISTER_CONVERT_*):
Pass length of desired type to store/extract_floating.
* config/i386/tm-arm.h, config/i386/tm-i386aix.h,
config/i386/tm-sun386.h, config/i386/tm-symmetry.h,
config/m88k/tm-m88k.h config/rs6000/tm-rs6000.h (REGISTER_CONVERT_*):
Use extract_floating and store_floating with length of desired type.
* config/m68k/tm-news.h (STORE,EXTRACT_RETURN_VALUE): Add type
parameter to REGISTER_CONVERT_*.
* config/a29k/tm-a29k.h, config/convex/tm-convex.h,
config/gould/tm-np1.h, config/gould/tm-pn.h, config/h8300/tm-h8300.h,
config/h8500/tm-h8500.h, config/i386/tm-i386v.h,
config/mips/tm-mips.h, config/ns32k/tm-merlin.h,
config/ns32k/tm-umax.h, config/pa/tm-hppa.h, config/pyr/tm-pyr.h,
config/sh/tm-sh.h, config/sparc/tm-sparc.h, config/tahoe/tm-tahoe.h,
config/vax/tm-vax.h, config/z8k/tm-z8k.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_RAW, REGISTER_CONVERT_TO_VIRTUAL): Remove
versions for which REGISTER_CONVERTIBLE is always false.
* z8k-tdep.c (register_convert_to_virtual, register_convert_to_raw):
Remove, no longer used.
* alpha-tdep.c (alpha_register_convert_to_raw,
alpha_register_convert_to_virtual): New routines to handle
the different raw formats in alpha floating point registers.
* config/alpha/tm-alpha.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_VIRTUAL, REGISTER_CONVERT_TO_RAW): Use them.
1993-11-02 21:51:10 +00:00
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store_floating ((TO), TYPE_LENGTH (TYPE), val); \
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1993-03-23 01:19:58 +00:00
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}
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* findvar.c (value_of_register, value_from_register),
hppa-tdep.c (pa_print_fp_reg), infcmd.c (do_registers_info),
valops.c (value_assign): Use REGISTER_CONVERT_TO_* only if
REGISTER_CONVERTIBLE is defined, otherwise just copy the content.
Pass desired type to REGISTER_CONVERT_TO_*.
* config/m68k/tm-m68k.h, config/i960/tm-i960.h (REGISTER_CONVERT_*):
Pass length of desired type to store/extract_floating.
* config/i386/tm-arm.h, config/i386/tm-i386aix.h,
config/i386/tm-sun386.h, config/i386/tm-symmetry.h,
config/m88k/tm-m88k.h config/rs6000/tm-rs6000.h (REGISTER_CONVERT_*):
Use extract_floating and store_floating with length of desired type.
* config/m68k/tm-news.h (STORE,EXTRACT_RETURN_VALUE): Add type
parameter to REGISTER_CONVERT_*.
* config/a29k/tm-a29k.h, config/convex/tm-convex.h,
config/gould/tm-np1.h, config/gould/tm-pn.h, config/h8300/tm-h8300.h,
config/h8500/tm-h8500.h, config/i386/tm-i386v.h,
config/mips/tm-mips.h, config/ns32k/tm-merlin.h,
config/ns32k/tm-umax.h, config/pa/tm-hppa.h, config/pyr/tm-pyr.h,
config/sh/tm-sh.h, config/sparc/tm-sparc.h, config/tahoe/tm-tahoe.h,
config/vax/tm-vax.h, config/z8k/tm-z8k.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_RAW, REGISTER_CONVERT_TO_VIRTUAL): Remove
versions for which REGISTER_CONVERTIBLE is always false.
* z8k-tdep.c (register_convert_to_virtual, register_convert_to_raw):
Remove, no longer used.
* alpha-tdep.c (alpha_register_convert_to_raw,
alpha_register_convert_to_virtual): New routines to handle
the different raw formats in alpha floating point registers.
* config/alpha/tm-alpha.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_VIRTUAL, REGISTER_CONVERT_TO_RAW): Use them.
1993-11-02 21:51:10 +00:00
|
|
|
|
/* Convert data from virtual format with type TYPE in buffer FROM
|
|
|
|
|
to raw format for register REGNUM in buffer TO. */
|
1993-03-23 01:19:58 +00:00
|
|
|
|
|
* findvar.c (value_of_register, value_from_register),
hppa-tdep.c (pa_print_fp_reg), infcmd.c (do_registers_info),
valops.c (value_assign): Use REGISTER_CONVERT_TO_* only if
REGISTER_CONVERTIBLE is defined, otherwise just copy the content.
Pass desired type to REGISTER_CONVERT_TO_*.
* config/m68k/tm-m68k.h, config/i960/tm-i960.h (REGISTER_CONVERT_*):
Pass length of desired type to store/extract_floating.
* config/i386/tm-arm.h, config/i386/tm-i386aix.h,
config/i386/tm-sun386.h, config/i386/tm-symmetry.h,
config/m88k/tm-m88k.h config/rs6000/tm-rs6000.h (REGISTER_CONVERT_*):
Use extract_floating and store_floating with length of desired type.
* config/m68k/tm-news.h (STORE,EXTRACT_RETURN_VALUE): Add type
parameter to REGISTER_CONVERT_*.
* config/a29k/tm-a29k.h, config/convex/tm-convex.h,
config/gould/tm-np1.h, config/gould/tm-pn.h, config/h8300/tm-h8300.h,
config/h8500/tm-h8500.h, config/i386/tm-i386v.h,
config/mips/tm-mips.h, config/ns32k/tm-merlin.h,
config/ns32k/tm-umax.h, config/pa/tm-hppa.h, config/pyr/tm-pyr.h,
config/sh/tm-sh.h, config/sparc/tm-sparc.h, config/tahoe/tm-tahoe.h,
config/vax/tm-vax.h, config/z8k/tm-z8k.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_RAW, REGISTER_CONVERT_TO_VIRTUAL): Remove
versions for which REGISTER_CONVERTIBLE is always false.
* z8k-tdep.c (register_convert_to_virtual, register_convert_to_raw):
Remove, no longer used.
* alpha-tdep.c (alpha_register_convert_to_raw,
alpha_register_convert_to_virtual): New routines to handle
the different raw formats in alpha floating point registers.
* config/alpha/tm-alpha.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_VIRTUAL, REGISTER_CONVERT_TO_RAW): Use them.
1993-11-02 21:51:10 +00:00
|
|
|
|
#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
|
1993-03-23 01:19:58 +00:00
|
|
|
|
{ \
|
* findvar.c (value_of_register, value_from_register),
hppa-tdep.c (pa_print_fp_reg), infcmd.c (do_registers_info),
valops.c (value_assign): Use REGISTER_CONVERT_TO_* only if
REGISTER_CONVERTIBLE is defined, otherwise just copy the content.
Pass desired type to REGISTER_CONVERT_TO_*.
* config/m68k/tm-m68k.h, config/i960/tm-i960.h (REGISTER_CONVERT_*):
Pass length of desired type to store/extract_floating.
* config/i386/tm-arm.h, config/i386/tm-i386aix.h,
config/i386/tm-sun386.h, config/i386/tm-symmetry.h,
config/m88k/tm-m88k.h config/rs6000/tm-rs6000.h (REGISTER_CONVERT_*):
Use extract_floating and store_floating with length of desired type.
* config/m68k/tm-news.h (STORE,EXTRACT_RETURN_VALUE): Add type
parameter to REGISTER_CONVERT_*.
* config/a29k/tm-a29k.h, config/convex/tm-convex.h,
config/gould/tm-np1.h, config/gould/tm-pn.h, config/h8300/tm-h8300.h,
config/h8500/tm-h8500.h, config/i386/tm-i386v.h,
config/mips/tm-mips.h, config/ns32k/tm-merlin.h,
config/ns32k/tm-umax.h, config/pa/tm-hppa.h, config/pyr/tm-pyr.h,
config/sh/tm-sh.h, config/sparc/tm-sparc.h, config/tahoe/tm-tahoe.h,
config/vax/tm-vax.h, config/z8k/tm-z8k.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_RAW, REGISTER_CONVERT_TO_VIRTUAL): Remove
versions for which REGISTER_CONVERTIBLE is always false.
* z8k-tdep.c (register_convert_to_virtual, register_convert_to_raw):
Remove, no longer used.
* alpha-tdep.c (alpha_register_convert_to_raw,
alpha_register_convert_to_virtual): New routines to handle
the different raw formats in alpha floating point registers.
* config/alpha/tm-alpha.h (REGISTER_CONVERTIBLE,
REGISTER_CONVERT_TO_VIRTUAL, REGISTER_CONVERT_TO_RAW): Use them.
1993-11-02 21:51:10 +00:00
|
|
|
|
double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
|
1994-02-28 06:06:05 +00:00
|
|
|
|
floatformat_from_double (&floatformat_i960_ext, &val, (TO)); \
|
1993-03-23 01:19:58 +00:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return the GDB type object for the "standard" data type
|
|
|
|
|
of data in register N. */
|
|
|
|
|
|
|
|
|
|
#define REGISTER_VIRTUAL_TYPE(N) ((N) < FP0_REGNUM ? \
|
|
|
|
|
builtin_type_int : builtin_type_double)
|
|
|
|
|
|
|
|
|
|
/* Macros for understanding function return values... */
|
|
|
|
|
|
|
|
|
|
/* Does the specified function use the "struct returning" convention
|
|
|
|
|
or the "value returning" convention? The "value returning" convention
|
|
|
|
|
almost invariably returns the entire value in registers. The
|
|
|
|
|
"struct returning" convention often returns the entire value in
|
|
|
|
|
memory, and passes a pointer (out of or into the function) saying
|
|
|
|
|
where the value (is or should go).
|
|
|
|
|
|
|
|
|
|
Since this sometimes depends on whether it was compiled with GCC,
|
|
|
|
|
this is also an argument. This is used in call_function to build a
|
|
|
|
|
stack, and in value_being_returned to print return values.
|
|
|
|
|
|
|
|
|
|
On i960, a structure is returned in registers g0-g3, if it will fit.
|
|
|
|
|
If it's more than 16 bytes long, g13 pointed to it on entry. */
|
|
|
|
|
|
|
|
|
|
#define USE_STRUCT_CONVENTION(gcc_p, type) (TYPE_LENGTH (type) > 16)
|
|
|
|
|
|
|
|
|
|
/* 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. This is only called if USE_STRUCT_CONVENTION for this
|
|
|
|
|
type is 0.
|
|
|
|
|
|
|
|
|
|
On the i960 we just take as many bytes as we need from G0 through G3. */
|
|
|
|
|
|
|
|
|
|
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
|
1993-09-01 20:37:15 +00:00
|
|
|
|
memcpy(VALBUF, REGBUF+REGISTER_BYTE(G0_REGNUM), TYPE_LENGTH (TYPE))
|
1993-03-23 01:19:58 +00:00
|
|
|
|
|
|
|
|
|
/* If USE_STRUCT_CONVENTION produces a 1,
|
|
|
|
|
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).
|
|
|
|
|
|
|
|
|
|
Address of where to put structure was passed in in global
|
|
|
|
|
register g13 on entry. God knows what's in g13 now. The
|
|
|
|
|
(..., 0) below is to make it appear to return a value, though
|
|
|
|
|
actually all it does is call error(). */
|
|
|
|
|
|
|
|
|
|
#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
|
|
|
|
|
(error("Don't know where large structure is returned on i960"), 0)
|
|
|
|
|
|
|
|
|
|
/* Write into appropriate registers a function return value
|
|
|
|
|
of type TYPE, given in virtual format, for "value returning" functions.
|
|
|
|
|
|
|
|
|
|
For 'return' command: not (yet) implemented for i960. */
|
|
|
|
|
|
|
|
|
|
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
|
|
|
|
|
error ("Returning values from functions is not implemented in i960 gdb")
|
|
|
|
|
|
|
|
|
|
/* Store the address of the place in which to copy the structure the
|
|
|
|
|
subroutine will return. This is called from call_function. */
|
|
|
|
|
|
|
|
|
|
#define STORE_STRUCT_RETURN(ADDR, SP) \
|
|
|
|
|
error ("Returning values from functions is not implemented in i960 gdb")
|
|
|
|
|
|
|
|
|
|
/* 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.
|
|
|
|
|
|
|
|
|
|
However, if FRAME_CHAIN_VALID returns zero,
|
|
|
|
|
it means the given frame is the outermost one and has no caller. */
|
|
|
|
|
|
|
|
|
|
/* We cache information about saved registers in the frame structure,
|
|
|
|
|
to save us from having to re-scan function prologues every time
|
|
|
|
|
a register in a non-current frame is accessed. */
|
|
|
|
|
|
|
|
|
|
#define EXTRA_FRAME_INFO \
|
|
|
|
|
struct frame_saved_regs *fsr; \
|
|
|
|
|
CORE_ADDR arg_pointer;
|
|
|
|
|
|
|
|
|
|
/* Zero the frame_saved_regs pointer when the frame is initialized,
|
|
|
|
|
so that FRAME_FIND_SAVED_REGS () will know to allocate and
|
|
|
|
|
initialize a frame_saved_regs struct the first time it is called.
|
|
|
|
|
Set the arg_pointer to -1, which is not valid; 0 and other values
|
|
|
|
|
indicate real, cached values. */
|
|
|
|
|
|
|
|
|
|
#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
|
|
|
|
|
((fi)->fsr = 0, (fi)->arg_pointer = -1)
|
|
|
|
|
|
|
|
|
|
/* On the i960, we get the chain pointer by reading the PFP saved
|
|
|
|
|
on the stack and clearing the status bits. */
|
|
|
|
|
|
|
|
|
|
#define FRAME_CHAIN(thisframe) \
|
|
|
|
|
(read_memory_integer (FRAME_FP(thisframe), 4) & ~0xf)
|
|
|
|
|
|
|
|
|
|
/* FRAME_CHAIN_VALID returns zero if the given frame is the outermost one
|
|
|
|
|
and has no caller.
|
|
|
|
|
|
|
|
|
|
On the i960, each various target system type must define FRAME_CHAIN_VALID,
|
|
|
|
|
since it differs between NINDY and VxWorks, the two currently supported
|
|
|
|
|
targets types. We leave it undefined here. */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* 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) \
|
|
|
|
|
{ (FRAMELESS) = (leafproc_return ((FI)->pc) != 0); }
|
|
|
|
|
|
|
|
|
|
/* Note that in the i960 architecture the return pointer is saved in the
|
|
|
|
|
*caller's* stack frame.
|
|
|
|
|
|
|
|
|
|
Make sure to zero low-order bits because of bug in 960CA A-step part
|
|
|
|
|
(instruction addresses should always be word-aligned anyway). */
|
|
|
|
|
|
|
|
|
|
#define FRAME_SAVED_PC(frame) \
|
|
|
|
|
((read_memory_integer(FRAME_CHAIN(frame)+8,4)) & ~3)
|
|
|
|
|
|
|
|
|
|
/* On the i960, FRAME_ARGS_ADDRESS should return the value of
|
|
|
|
|
g14 as passed into the frame, if known. We need a function for this.
|
|
|
|
|
We cache this value in the frame info if we've already looked it up. */
|
|
|
|
|
|
|
|
|
|
#define FRAME_ARGS_ADDRESS(fi) \
|
|
|
|
|
(((fi)->arg_pointer != -1)? (fi)->arg_pointer: frame_args_address (fi, 0))
|
|
|
|
|
extern CORE_ADDR frame_args_address (); /* i960-tdep.c */
|
|
|
|
|
|
|
|
|
|
/* This is the same except it should return 0 when
|
|
|
|
|
it does not really know where the args are, rather than guessing.
|
|
|
|
|
This value is not cached since it is only used infrequently. */
|
|
|
|
|
|
|
|
|
|
#define FRAME_ARGS_ADDRESS_CORRECT(fi) (frame_args_address (fi, 1))
|
|
|
|
|
|
|
|
|
|
#define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
|
|
|
|
|
|
|
|
|
|
/* Set NUMARGS to the number of args passed to a frame.
|
|
|
|
|
Can return -1, meaning no way to tell. */
|
|
|
|
|
|
|
|
|
|
#define FRAME_NUM_ARGS(numargs, fi) (numargs = -1)
|
|
|
|
|
|
|
|
|
|
/* Return number of bytes at start of arglist that are not really args. */
|
|
|
|
|
|
|
|
|
|
#define FRAME_ARGS_SKIP 0
|
|
|
|
|
|
|
|
|
|
/* Produce the positions of the saved registers in a stack frame. */
|
|
|
|
|
|
|
|
|
|
#define FRAME_FIND_SAVED_REGS(frame_info_addr, sr) \
|
|
|
|
|
frame_find_saved_regs (frame_info_addr, &sr)
|
|
|
|
|
extern void frame_find_saved_regs(); /* See i960-tdep.c */
|
|
|
|
|
|
|
|
|
|
/* Things needed for making calls to functions in the inferior process */
|
|
|
|
|
|
|
|
|
|
/* Push an empty stack frame, to record the current ip, etc.
|
|
|
|
|
|
|
|
|
|
Not (yet?) implemented for i960. */
|
|
|
|
|
|
|
|
|
|
#define PUSH_DUMMY_FRAME \
|
|
|
|
|
error("Function calls into the inferior process are not supported on the i960")
|
|
|
|
|
|
|
|
|
|
/* Discard from the stack the innermost frame, restoring all registers. */
|
|
|
|
|
|
|
|
|
|
#define POP_FRAME \
|
|
|
|
|
pop_frame ()
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* This sequence of words is the instructions
|
|
|
|
|
|
|
|
|
|
callx 0x00000000
|
|
|
|
|
fmark
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* #define CALL_DUMMY { 0x86003000, 0x00000000, 0x66003e00 } */
|
|
|
|
|
|
|
|
|
|
/* #define CALL_DUMMY_START_OFFSET 0 *//* Start execution at beginning of dummy */
|
|
|
|
|
|
|
|
|
|
/* Indicate that we don't support calling inferior child functions. */
|
|
|
|
|
|
|
|
|
|
#undef CALL_DUMMY
|
|
|
|
|
|
|
|
|
|
/* Insert the specified number of args and function address
|
|
|
|
|
into a call sequence of the above form stored at 'dummyname'.
|
|
|
|
|
|
|
|
|
|
Ignore arg count on i960. */
|
|
|
|
|
|
|
|
|
|
/* #define FIX_CALL_DUMMY(dummyname, fun, nargs) *(((int *)dummyname)+1) = fun */
|
|
|
|
|
|
|
|
|
|
#undef FIX_CALL_DUMMY
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Interface definitions for kernel debugger KDB */
|
|
|
|
|
/* (Not relevant to i960.) */
|