diff options
Diffstat (limited to 'gdb/config/m88k/tm-m88k.h')
| -rw-r--r-- | gdb/config/m88k/tm-m88k.h | 620 |
1 files changed, 0 insertions, 620 deletions
diff --git a/gdb/config/m88k/tm-m88k.h b/gdb/config/m88k/tm-m88k.h deleted file mode 100644 index 390cdef..0000000 --- a/gdb/config/m88k/tm-m88k.h +++ /dev/null @@ -1,620 +0,0 @@ -/* Target machine description for generic Motorola 88000, for GDB. - Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1993 - 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. */ - -/* g++ support is not yet included. */ - -/* Define the bit, byte, and word ordering of the machine. */ -#define TARGET_BYTE_ORDER BIG_ENDIAN - -/* 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 locals_pointer; \ - CORE_ADDR args_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) \ - init_extra_frame_info (fromleaf, fi) -extern void init_extra_frame_info (); - -#define IEEE_FLOAT - -/* 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(frompc) \ - { (frompc) = skip_prologue (frompc); } -extern CORE_ADDR skip_prologue (); - -/* The m88k kernel aligns all instructions on 4-byte boundaries. The - kernel also uses the least significant two bits for its own hocus - pocus. When gdb receives an address from the kernel, it needs to - preserve those right-most two bits, but gdb also needs to be careful - to realize that those two bits are not really a part of the address - of an instruction. Shrug. */ - -extern CORE_ADDR m88k_addr_bits_remove PARAMS ((CORE_ADDR)); -#define ADDR_BITS_REMOVE(addr) m88k_addr_bits_remove (addr) - -/* 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) \ - (ADDR_BITS_REMOVE (read_register (SRP_REGNUM))) - -/* Stack grows downward. */ - -#define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) - -/* Sequence of bytes for breakpoint instruction. */ - -/* instruction 0xF000D1FF is 'tb0 0,r0,511' - If Bit bit 0 of r0 is clear (always true), - initiate exception processing (trap). - */ -#define BREAKPOINT {0xF0, 0x00, 0xD1, 0xFF} - -/* 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 0 - -/* 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 4 - -/* Number of machine registers */ - -#define GP_REGS (38) -#define FP_REGS (32) -#define NUM_REGS (GP_REGS + FP_REGS) - -/* Initializer for an array of names of registers. - There should be NUM_REGS strings in this initializer. */ - -#define REGISTER_NAMES {\ - "r0",\ - "r1",\ - "r2",\ - "r3",\ - "r4",\ - "r5",\ - "r6",\ - "r7",\ - "r8",\ - "r9",\ - "r10",\ - "r11",\ - "r12",\ - "r13",\ - "r14",\ - "r15",\ - "r16",\ - "r17",\ - "r18",\ - "r19",\ - "r20",\ - "r21",\ - "r22",\ - "r23",\ - "r24",\ - "r25",\ - "r26",\ - "r27",\ - "r28",\ - "r29",\ - "r30",\ - "r31",\ - "psr",\ - "fpsr",\ - "fpcr",\ - "sxip",\ - "snip",\ - "sfip",\ - "x0",\ - "x1",\ - "x2",\ - "x3",\ - "x4",\ - "x5",\ - "x6",\ - "x7",\ - "x8",\ - "x9",\ - "x10",\ - "x11",\ - "x12",\ - "x13",\ - "x14",\ - "x15",\ - "x16",\ - "x17",\ - "x18",\ - "x19",\ - "x20",\ - "x21",\ - "x22",\ - "x23",\ - "x24",\ - "x25",\ - "x26",\ - "x27",\ - "x28",\ - "x29",\ - "x30",\ - "x31",\ - "vbr",\ - "dmt0",\ - "dmd0",\ - "dma0",\ - "dmt1",\ - "dmd1",\ - "dma1",\ - "dmt2",\ - "dmd2",\ - "dma2",\ - "sr0",\ - "sr1",\ - "sr2",\ - "sr3",\ - "fpecr",\ - "fphs1",\ - "fpls1",\ - "fphs2",\ - "fpls2",\ - "fppt",\ - "fprh",\ - "fprl",\ - "fpit",\ - "fpsr",\ - "fpcr",\ - } - - -/* 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 R0_REGNUM 0 /* Contains the constant zero */ -#define SRP_REGNUM 1 /* Contains subroutine return pointer */ -#define RV_REGNUM 2 /* Contains simple return values */ -#define SRA_REGNUM 12 /* Contains address of struct return values */ -#define SP_REGNUM 31 /* Contains address of top of stack */ - -/* Instruction pointer notes... - - On the m88100: - - * cr04 = sxip. On exception, contains the excepting pc (probably). - On rte, is ignored. - - * cr05 = snip. On exception, contains the NPC (next pc). On rte, - pc is loaded from here. - - * cr06 = sfip. On exception, contains the NNPC (next next pc). On - rte, the NPC is loaded from here. - - * lower two bits of each are flag bits. Bit 1 is V means address - is valid. If address is not valid, bit 0 is ignored. Otherwise, - bit 0 is E and asks for an exception to be taken if this - instruction is executed. - - On the m88110: - - * cr04 = exip. On exception, contains the address of the excepting - pc (always). On rte, pc is loaded from here. Bit 0, aka the D - bit, is a flag saying that the offending instruction was in a - branch delay slot. If set, then cr05 contains the NPC. - - * cr05 = enip. On exception, if the instruction pointed to by cr04 - was in a delay slot as indicated by the bit 0 of cr04, aka the D - bit, the cr05 contains the NPC. Otherwise ignored. - - * cr06 is invalid */ - -/* Note that the Harris Unix kernels emulate the m88100's behavior on - the m88110. */ - -#define SXIP_REGNUM 35 /* On m88100, Contains Shadow Execute - Instruction Pointer. */ -#define SNIP_REGNUM 36 /* On m88100, Contains Shadow Next - Instruction Pointer. */ -#define SFIP_REGNUM 37 /* On m88100, Contains Shadow Fetched - Intruction pointer. */ - -#define EXIP_REGNUM 35 /* On m88110, Contains Exception - Executing Instruction Pointer. */ -#define ENIP_REGNUM 36 /* On m88110, Contains the Exception - Next Instruction Pointer. */ - -#define PC_REGNUM SXIP_REGNUM /* Program Counter */ -#define NPC_REGNUM SNIP_REGNUM /* Next Program Counter */ -#define NNPC_REGNUM SFIP_REGNUM /* Next Next Program Counter */ - -#define PSR_REGNUM 32 /* Processor Status Register */ -#define FPSR_REGNUM 33 /* Floating Point Status Register */ -#define FPCR_REGNUM 34 /* Floating Point Control Register */ -#define XFP_REGNUM 38 /* First Extended Float Register */ -#define X0_REGNUM XFP_REGNUM /* Which also contains the constant zero */ - -/* This is rather a confusing lie. Our m88k port using a stack pointer value - for the frame address. Hence, the frame address and the frame pointer are - only indirectly related. The value of this macro is the register number - fetched by the machine "independent" portions of gdb when they want to know - about a frame address. Thus, we lie here and claim that FP_REGNUM is - SP_REGNUM. */ -#define FP_REGNUM SP_REGNUM /* Reg fetched to locate frame when pgm stops */ -#define ACTUAL_FP_REGNUM 30 - -/* PSR status bit definitions. */ - -#define PSR_MODE 0x80000000 -#define PSR_BYTE_ORDER 0x40000000 -#define PSR_SERIAL_MODE 0x20000000 -#define PSR_CARRY 0x10000000 -#define PSR_SFU_DISABLE 0x000003f0 -#define PSR_SFU1_DISABLE 0x00000008 -#define PSR_MXM 0x00000004 -#define PSR_IND 0x00000002 -#define PSR_SFRZ 0x00000001 - - - -/* The following two comments come from the days prior to the m88110 - port. The m88110 handles the instruction pointers differently. I - do not know what any m88110 kernels do as the m88110 port I'm - working with is for an embedded system. rich@cygnus.com - 13-sept-93. */ - -/* BCS requires that the SXIP_REGNUM (or PC_REGNUM) contain the - address of the next instr to be executed when a breakpoint occurs. - Because the kernel gets the next instr (SNIP_REGNUM), the instr in - SNIP needs to be put back into SFIP, and the instr in SXIP should - be shifted to SNIP */ - -/* Are you sitting down? It turns out that the 88K BCS (binary - compatibility standard) folks originally felt that the debugger - should be responsible for backing up the IPs, not the kernel (as is - usually done). Well, they have reversed their decision, and in - future releases our kernel will be handling the backing up of the - IPs. So, eventually, we won't need to do the SHIFT_INST_REGS - stuff. But, for now, since there are 88K systems out there that do - need the debugger to do the IP shifting, and since there will be - systems where the kernel does the shifting, the code is a little - more complex than perhaps it needs to be (we still go inside - SHIFT_INST_REGS, and if the shifting hasn't occurred then gdb goes - ahead and shifts). */ - -extern int target_is_m88110; -#define SHIFT_INST_REGS() \ -if (!target_is_m88110) \ -{ \ - CORE_ADDR pc = read_register (PC_REGNUM); \ - CORE_ADDR npc = read_register (NPC_REGNUM); \ - if (pc != npc) \ - { \ - write_register (NNPC_REGNUM, npc); \ - write_register (NPC_REGNUM, pc); \ - } \ -} - - /* Storing the following registers is a no-op. */ -#define CANNOT_STORE_REGISTER(regno) (((regno) == R0_REGNUM) \ - || ((regno) == X0_REGNUM)) - - /* Number of bytes of storage in the actual machine representation - for register N. On the m88k, the general purpose registers are 4 - bytes and the 88110 extended registers are 10 bytes. */ - -#define REGISTER_RAW_SIZE(N) ((N) < XFP_REGNUM ? 4 : 10) - - /* Total amount of space needed to store our copies of the machine's - register state, the array `registers'. */ - -#define REGISTER_BYTES ((GP_REGS * REGISTER_RAW_SIZE(0)) \ - + (FP_REGS * REGISTER_RAW_SIZE(XFP_REGNUM))) - - /* Index within `registers' of the first byte of the space for - register N. */ - -#define REGISTER_BYTE(N) (((N) * REGISTER_RAW_SIZE(0)) \ - + ((N) >= XFP_REGNUM \ - ? (((N) - XFP_REGNUM) \ - * REGISTER_RAW_SIZE(XFP_REGNUM)) \ - : 0)) - - /* Number of bytes of storage in the program's representation for - register N. On the m88k, all registers are 4 bytes excepting the - m88110 extended registers which are 8 byte doubles. */ - -#define REGISTER_VIRTUAL_SIZE(N) ((N) < XFP_REGNUM ? 4 : 8) - - /* Largest value REGISTER_RAW_SIZE can have. */ - -#define MAX_REGISTER_RAW_SIZE (REGISTER_RAW_SIZE(XFP_REGNUM)) - - /* Largest value REGISTER_VIRTUAL_SIZE can have. - Are FPS1, FPS2, FPR "virtual" regisers? */ - -#define MAX_REGISTER_VIRTUAL_SIZE (REGISTER_RAW_SIZE(XFP_REGNUM)) - - /* Nonzero if register N requires conversion - from raw format to virtual format. */ - -#define REGISTER_CONVERTIBLE(N) ((N) >= XFP_REGNUM) - -#include "floatformat.h" - -/* 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) \ -{ \ - double val; \ - floatformat_to_double (&floatformat_m88110_ext, (FROM), &val); \ - store_floating ((TO), TYPE_LENGTH (TYPE), val); \ -} - -/* 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) \ -{ \ - double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \ - floatformat_from_double (&floatformat_m88110_ext, &val, (TO)); \ -} - -/* Return the GDB type object for the "standard" data type - of data in register N. */ - -#define REGISTER_VIRTUAL_TYPE(N) \ -((N) >= XFP_REGNUM \ - ? builtin_type_double \ - : ((N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM \ - ? lookup_pointer_type (builtin_type_void) : builtin_type_int)) - -/* The 88k call/return conventions call for "small" values to be returned - into consecutive registers starting from r2. */ - -#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ - memcpy ((VALBUF), &(((char *)REGBUF)[REGISTER_BYTE(RV_REGNUM)]), TYPE_LENGTH (TYPE)) - -#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF)) - -/* Write into appropriate registers a function return value - of type TYPE, given in virtual format. */ - -#define STORE_RETURN_VALUE(TYPE,VALBUF) \ - write_register_bytes (2*REGISTER_RAW_SIZE(0), (VALBUF), TYPE_LENGTH (TYPE)) - -/* In COFF, if PCC says a parameter is a short or a char, do not - change it to int (it seems the convention is to change it). */ - -#define BELIEVE_PCC_PROMOTION 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. - - However, if FRAME_CHAIN_VALID returns zero, - it means the given frame is the outermost one and has no caller. */ - -extern CORE_ADDR frame_chain (); -extern int frame_chain_valid (); -extern int frameless_function_invocation (); - -#define FRAME_CHAIN(thisframe) \ - frame_chain (thisframe) - -#define FRAMELESS_FUNCTION_INVOCATION(frame, fromleaf) \ - fromleaf = frameless_function_invocation (frame) - -/* Define other aspects of the stack frame. */ - -#define FRAME_SAVED_PC(FRAME) \ - frame_saved_pc (FRAME) -extern CORE_ADDR frame_saved_pc (); - -#define FRAME_ARGS_ADDRESS(fi) \ - frame_args_address (fi) -extern CORE_ADDR frame_args_address (); - -#define FRAME_LOCALS_ADDRESS(fi) \ - frame_locals_address (fi) -extern CORE_ADDR frame_locals_address (); - -/* Return 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 - -/* 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. */ - -/* On the 88k, parameter registers get stored into the so called "homing" - area. This *always* happens when you compiled with GCC and use -g. - Also, (with GCC and -g) the saving of the parameter register values - always happens right within the function prologue code, so these register - values can generally be relied upon to be already copied into their - respective homing slots by the time you will normally try to look at - them (we hope). - - Note that homing area stack slots are always at *positive* offsets from - the frame pointer. Thus, the homing area stack slots for the parameter - registers (passed values) for a given function are actually part of the - frame area of the caller. This is unusual, but it should not present - any special problems for GDB. - - Note also that on the 88k, we are only interested in finding the - registers that might have been saved in memory. This is a subset of - the whole set of registers because the standard calling sequence allows - the called routine to clobber many registers. - - We could manage to locate values for all of the so called "preserved" - registers (some of which may get saved within any particular frame) but - that would require decoding all of the tdesc information. That would be - nice information for GDB to have, but it is not strictly manditory if we - can live without the ability to look at values within (or backup to) - previous frames. -*/ - -struct frame_saved_regs; -struct frame_info; - -void frame_find_saved_regs PARAMS((struct frame_info *fi, - struct frame_saved_regs *fsr)); - -#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ - frame_find_saved_regs (frame_info, &frame_saved_regs) - - -#define POP_FRAME pop_frame () -extern void pop_frame (); - -/* Call function stuff contributed by Kevin Buettner of Motorola. */ - -#define CALL_DUMMY_LOCATION AFTER_TEXT_END - -extern void m88k_push_dummy_frame(); -#define PUSH_DUMMY_FRAME m88k_push_dummy_frame() - -#define CALL_DUMMY { \ -0x67ff00c0, /* 0: subu #sp,#sp,0xc0 */ \ -0x243f0004, /* 4: st #r1,#sp,0x4 */ \ -0x245f0008, /* 8: st #r2,#sp,0x8 */ \ -0x247f000c, /* c: st #r3,#sp,0xc */ \ -0x249f0010, /* 10: st #r4,#sp,0x10 */ \ -0x24bf0014, /* 14: st #r5,#sp,0x14 */ \ -0x24df0018, /* 18: st #r6,#sp,0x18 */ \ -0x24ff001c, /* 1c: st #r7,#sp,0x1c */ \ -0x251f0020, /* 20: st #r8,#sp,0x20 */ \ -0x253f0024, /* 24: st #r9,#sp,0x24 */ \ -0x255f0028, /* 28: st #r10,#sp,0x28 */ \ -0x257f002c, /* 2c: st #r11,#sp,0x2c */ \ -0x259f0030, /* 30: st #r12,#sp,0x30 */ \ -0x25bf0034, /* 34: st #r13,#sp,0x34 */ \ -0x25df0038, /* 38: st #r14,#sp,0x38 */ \ -0x25ff003c, /* 3c: st #r15,#sp,0x3c */ \ -0x261f0040, /* 40: st #r16,#sp,0x40 */ \ -0x263f0044, /* 44: st #r17,#sp,0x44 */ \ -0x265f0048, /* 48: st #r18,#sp,0x48 */ \ -0x267f004c, /* 4c: st #r19,#sp,0x4c */ \ -0x269f0050, /* 50: st #r20,#sp,0x50 */ \ -0x26bf0054, /* 54: st #r21,#sp,0x54 */ \ -0x26df0058, /* 58: st #r22,#sp,0x58 */ \ -0x26ff005c, /* 5c: st #r23,#sp,0x5c */ \ -0x271f0060, /* 60: st #r24,#sp,0x60 */ \ -0x273f0064, /* 64: st #r25,#sp,0x64 */ \ -0x275f0068, /* 68: st #r26,#sp,0x68 */ \ -0x277f006c, /* 6c: st #r27,#sp,0x6c */ \ -0x279f0070, /* 70: st #r28,#sp,0x70 */ \ -0x27bf0074, /* 74: st #r29,#sp,0x74 */ \ -0x27df0078, /* 78: st #r30,#sp,0x78 */ \ -0x63df0000, /* 7c: addu #r30,#sp,0x0 */ \ -0x145f0000, /* 80: ld #r2,#sp,0x0 */ \ -0x147f0004, /* 84: ld #r3,#sp,0x4 */ \ -0x149f0008, /* 88: ld #r4,#sp,0x8 */ \ -0x14bf000c, /* 8c: ld #r5,#sp,0xc */ \ -0x14df0010, /* 90: ld #r6,#sp,0x10 */ \ -0x14ff0014, /* 94: ld #r7,#sp,0x14 */ \ -0x151f0018, /* 98: ld #r8,#sp,0x18 */ \ -0x153f001c, /* 9c: ld #r9,#sp,0x1c */ \ -0x5c200000, /* a0: or.u #r1,#r0,0x0 */ \ -0x58210000, /* a4: or #r1,#r1,0x0 */ \ -0xf400c801, /* a8: jsr #r1 */ \ -0xf000d1ff /* ac: tb0 0x0,#r0,0x1ff */ \ -} - -#define CALL_DUMMY_START_OFFSET 0x80 -#define CALL_DUMMY_LENGTH 0xb0 - -/* FIXME: byteswapping. */ -#define FIX_CALL_DUMMY(dummy, pc, fun, nargs, args, type, gcc_p) \ -{ \ - *(unsigned long *)((char *) (dummy) + 0xa0) |= \ - (((unsigned long) (fun)) >> 16); \ - *(unsigned long *)((char *) (dummy) + 0xa4) |= \ - (((unsigned long) (fun)) & 0xffff); \ - pc = text_end; \ -} - -/* Stack must be aligned on 64-bit boundaries when synthesizing - function calls. */ - -#define STACK_ALIGN(addr) (((addr) + 7) & -8) - -#define STORE_STRUCT_RETURN(addr, sp) \ - write_register (SRA_REGNUM, (addr)) - -#define NEED_TEXT_START_END 1 - -/* According to the MC88100 RISC Microprocessor User's Manual, section - 6.4.3.1.2: - - ... can be made to return to a particular instruction by placing a - valid instruction address in the SNIP and the next sequential - instruction address in the SFIP (with V bits set and E bits clear). - The rte resumes execution at the instruction pointed to by the - SNIP, then the SFIP. - - The E bit is the least significant bit (bit 0). The V (valid) bit is - bit 1. This is why we logical or 2 into the values we are writing - below. It turns out that SXIP plays no role when returning from an - exception so nothing special has to be done with it. We could even - (presumably) give it a totally bogus value. - - -- Kevin Buettner -*/ - -#define TARGET_WRITE_PC(val, pid) { \ - write_register_pid(SXIP_REGNUM, (long) val, pid); \ - write_register_pid(SNIP_REGNUM, (long) val | 2, pid); \ - write_register_pid(SFIP_REGNUM, ((long) val | 2) + 4, pid); \ -} |