diff options
Diffstat (limited to 'gdb/config/m68k/tm-m68k.h')
| -rw-r--r-- | gdb/config/m68k/tm-m68k.h | 343 |
1 files changed, 4 insertions, 339 deletions
diff --git a/gdb/config/m68k/tm-m68k.h b/gdb/config/m68k/tm-m68k.h index 5b23df0a0be..8b922815cf6 100644 --- a/gdb/config/m68k/tm-m68k.h +++ b/gdb/config/m68k/tm-m68k.h @@ -21,348 +21,13 @@ #include "regcache.h" -/* Generic 68000 stuff, to be included by other tm-*.h files. */ - -#define TARGET_LONG_DOUBLE_FORMAT &floatformat_m68881_ext - -#define TARGET_LONG_DOUBLE_BIT 96 - -/* 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. */ - -#if !defined(SKIP_PROLOGUE) -#define SKIP_PROLOGUE(ip) (m68k_skip_prologue (ip)) -#endif -extern CORE_ADDR m68k_skip_prologue (CORE_ADDR ip); - -/* 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. */ - -struct frame_info; -struct frame_saved_regs; - -extern CORE_ADDR m68k_saved_pc_after_call (struct frame_info *); -extern void m68k_find_saved_regs (struct frame_info *, - struct frame_saved_regs *); - -#define SAVED_PC_AFTER_CALL(frame) \ - m68k_saved_pc_after_call(frame) - -/* Stack grows downward. */ - -#define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) - -/* Stack must be kept short aligned when doing function calls. */ - -#define STACK_ALIGN(ADDR) (((ADDR) + 1) & ~1) - -/* Sequence of bytes for breakpoint instruction. - This is a TRAP instruction. The last 4 bits (0xf below) is the - vector. Systems which don't use 0xf should define BPT_VECTOR - themselves before including this file. */ - -#if !defined (BPT_VECTOR) -#define BPT_VECTOR 0xf -#endif - -#if !defined (BREAKPOINT) -#define BREAKPOINT {0x4e, (0x40 | BPT_VECTOR)} -#endif - -/* We default to vector 1 for the "remote" target, but allow targets - to override. */ -#if !defined (REMOTE_BPT_VECTOR) -#define REMOTE_BPT_VECTOR 1 -#endif - -#if !defined (REMOTE_BREAKPOINT) -#define REMOTE_BREAKPOINT {0x4e, (0x40 | REMOTE_BPT_VECTOR)} -#endif - -/* If your kernel resets the pc after the trap happens you may need to - define this before including this file. */ - -#if !defined (DECR_PC_AFTER_BREAK) -#define DECR_PC_AFTER_BREAK 2 -#endif +#define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL -/* 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 - -#define REGISTER_BYTES_FP (16*4 + 8 + 8*12 + 3*4) -#define REGISTER_BYTES_NOFP (16*4 + 8) - -#ifndef NUM_REGS -#define NUM_REGS 29 -#endif - -#define NUM_FREGS (NUM_REGS-24) - -#ifndef REGISTER_BYTES_OK -#define REGISTER_BYTES_OK(b) \ - ((b) == REGISTER_BYTES_FP \ - || (b) == REGISTER_BYTES_NOFP) -#endif - -#ifndef REGISTER_BYTES -#define REGISTER_BYTES (16*4 + 8 + 8*12 + 3*4) -#endif - -/* Index within `registers' of the first byte of the space for - register N. */ - -#define REGISTER_BYTE(N) \ - ((N) >= FPC_REGNUM ? (((N) - FPC_REGNUM) * 4) + 168 \ - : (N) >= FP0_REGNUM ? (((N) - FP0_REGNUM) * 12) + 72 \ - : (N) * 4) - -/* Number of bytes of storage in the actual machine representation - for register N. On the 68000, all regs are 4 bytes - except the floating point regs which are 12 bytes. */ -/* Note that the unsigned cast here forces the result of the - subtraction to very high positive values if N < FP0_REGNUM */ - -#define REGISTER_RAW_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 12 : 4) - -/* Number of bytes of storage in the program's representation - for register N. On the 68000, all regs are 4 bytes - except the floating point regs which are 12-byte long doubles. */ - -#define REGISTER_VIRTUAL_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 12 : 4) - -/* Largest value REGISTER_RAW_SIZE can have. */ - -#define MAX_REGISTER_RAW_SIZE 12 - -/* Largest value REGISTER_VIRTUAL_SIZE can have. */ - -#define MAX_REGISTER_VIRTUAL_SIZE 12 - -/* Return the GDB type object for the "standard" data type of data - in register N. This should be int for D0-D7, long double for FP0-FP7, - and void pointer for all others (A0-A7, PC, SR, FPCONTROL etc). - Note, for registers which contain addresses return pointer to void, - not pointer to char, because we don't want to attempt to print - the string after printing the address. */ - -#define REGISTER_VIRTUAL_TYPE(N) \ - ((unsigned) (N) >= FPC_REGNUM ? lookup_pointer_type (builtin_type_void) : \ - (unsigned) (N) >= FP0_REGNUM ? builtin_type_long_double : \ - (unsigned) (N) >= A0_REGNUM ? lookup_pointer_type (builtin_type_void) : \ - builtin_type_int) - -/* Initializer for an array of names of registers. - Entries beyond the first NUM_REGS are ignored. */ - -#define REGISTER_NAMES \ - {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", \ - "a0", "a1", "a2", "a3", "a4", "a5", "fp", "sp", \ - "ps", "pc", \ - "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \ - "fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags" } +/* Generic 68000 stuff, to be included by other tm-*.h files. */ -/* 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. */ +/* D0_REGNM and A0_REGNUM must be defined here because they are + used by the monitor. */ #define D0_REGNUM 0 #define A0_REGNUM 8 -#define A1_REGNUM 9 -#define FP_REGNUM 14 /* Contains address of executing stack frame */ -#define SP_REGNUM 15 /* Contains address of top of stack */ -#define PS_REGNUM 16 /* Contains processor status */ -#define PC_REGNUM 17 /* Contains program counter */ -#define FP0_REGNUM 18 /* Floating point register 0 */ -#define FPC_REGNUM 26 /* 68881 control register */ -#define FPS_REGNUM 27 /* 68881 status register */ -#define FPI_REGNUM 28 /* 68881 iaddr register */ - -/* 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) \ - { write_register (A1_REGNUM, (ADDR)); } - -/* 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 assuming that floating point values are returned - as doubles in d0/d1. */ - -#if !defined (EXTRACT_RETURN_VALUE) -#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ - memcpy ((VALBUF), \ - (char *)(REGBUF) + \ - (TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)), \ - TYPE_LENGTH(TYPE)) -#endif - -/* Write into appropriate registers a function return value - of type TYPE, given in virtual format. Assumes floats are passed - in d0/d1. */ - -#if !defined (STORE_RETURN_VALUE) -#define STORE_RETURN_VALUE(TYPE,VALBUF) \ - write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)) -#endif - -/* 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). */ - -#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF)) - -/* 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. - In the case of the 68000, the frame's nominal address - is the address of a 4-byte word containing the calling frame's address. */ - -/* If we are chaining from sigtramp, then manufacture a sigtramp frame - (which isn't really on the stack. I'm not sure this is right for anything - but BSD4.3 on an hp300. */ -#define FRAME_CHAIN(thisframe) \ - (thisframe->signal_handler_caller \ - ? thisframe->frame \ - : (!inside_entry_file ((thisframe)->pc) \ - ? read_memory_integer ((thisframe)->frame, 4) \ - : 0)) - -/* 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. */ -#define FRAMELESS_FUNCTION_INVOCATION(FI) \ - (((FI)->signal_handler_caller) ? 0 : frameless_look_for_prologue(FI)) - -/* This was determined by experimentation on hp300 BSD 4.3. Perhaps - it corresponds to some offset in /usr/include/sys/user.h or - something like that. Using some system include file would - have the advantage of probably being more robust in the face - of OS upgrades, but the disadvantage of being wrong for - cross-debugging. */ - -#define SIG_PC_FP_OFFSET 530 - -#define FRAME_SAVED_PC(FRAME) \ - (((FRAME)->signal_handler_caller \ - ? ((FRAME)->next \ - ? read_memory_integer ((FRAME)->next->frame + SIG_PC_FP_OFFSET, 4) \ - : read_memory_integer (read_register (SP_REGNUM) \ - + SIG_PC_FP_OFFSET - 8, 4) \ - ) \ - : read_memory_integer ((FRAME)->frame + 4, 4)) \ - ) - -#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) - -#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) - -/* Set VAL to the number of args passed to frame described by FI. - Can set VAL to -1, meaning no way to tell. */ - -/* We can't tell how many args there are - now that the C compiler delays popping them. */ -#if !defined (FRAME_NUM_ARGS) -#define FRAME_NUM_ARGS(fi) (-1) -#endif - -/* Return number of bytes at start of arglist that are not really args. */ - -#define FRAME_ARGS_SKIP 8 - -/* 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. */ - -#if !defined (FRAME_FIND_SAVED_REGS) -#define FRAME_FIND_SAVED_REGS(fi,fsr) m68k_find_saved_regs ((fi), &(fsr)) -#endif /* no FIND_FRAME_SAVED_REGS. */ - - -/* Things needed for making the inferior call functions. */ - -/* The CALL_DUMMY macro is the sequence of instructions, as disassembled - by gdb itself: - - These instructions exist only so that m68k_find_saved_regs can parse - them as a "prologue"; they are never executed. - - fmovemx fp0-fp7,sp@- 0xf227 0xe0ff - moveml d0-a5,sp@- 0x48e7 0xfffc - clrw sp@- 0x4267 - movew ccr,sp@- 0x42e7 - - The arguments are pushed at this point by GDB; no code is needed in - the dummy for this. The CALL_DUMMY_START_OFFSET gives the position - of the following jsr instruction. That is where we start - executing. - - jsr @#0x32323232 0x4eb9 0x3232 0x3232 - addal #0x69696969,sp 0xdffc 0x6969 0x6969 - trap #<your BPT_VECTOR number here> 0x4e4? - nop 0x4e71 - - Note this is CALL_DUMMY_LENGTH bytes (28 for the above example). - - The dummy frame always saves the floating-point registers, whether they - actually exist on this target or not. */ - -/* FIXME: Wrong to hardwire this as BPT_VECTOR when sometimes it - should be REMOTE_BPT_VECTOR. Best way to fix it would be to define - CALL_DUMMY_BREAKPOINT_OFFSET. */ - -#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, (0x4e404e71 | (BPT_VECTOR << 16))} -#define CALL_DUMMY_LENGTH 28 /* Size of CALL_DUMMY */ -#define CALL_DUMMY_START_OFFSET 12 /* Offset to jsr instruction */ -#define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 12) - -/* Insert the specified number of args and function address - into a call sequence of the above form stored at DUMMYNAME. - We use the BFD routines to store a big-endian value of known size. */ - -#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ -{ bfd_putb32 (fun, (unsigned char *) dummyname + CALL_DUMMY_START_OFFSET + 2); \ - bfd_putb32 (nargs*4, (unsigned char *) dummyname + CALL_DUMMY_START_OFFSET + 8); } - -/* Push an empty stack frame, to record the current PC, etc. */ - -#define PUSH_DUMMY_FRAME { m68k_push_dummy_frame (); } - -extern void m68k_push_dummy_frame (void); - -extern void m68k_pop_frame (void); - -/* Discard from the stack the innermost frame, restoring all registers. */ - -#define POP_FRAME { m68k_pop_frame (); } - -/* Offset from SP to first arg on stack at first instruction of a function */ - -#define SP_ARG0 (1 * 4) - -#define TARGET_M68K - -/* Figure out where the longjmp will land. Slurp the args out of the stack. - We expect the first arg to be a pointer to the jmp_buf structure from which - we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR. - This routine returns true on success */ -extern int m68k_get_longjmp_target (CORE_ADDR *); |