diff options
Diffstat (limited to 'gdb/m68k-tdep.c')
| -rw-r--r-- | gdb/m68k-tdep.c | 488 |
1 files changed, 442 insertions, 46 deletions
diff --git a/gdb/m68k-tdep.c b/gdb/m68k-tdep.c index 1c4bc4d..31e8e66 100644 --- a/gdb/m68k-tdep.c +++ b/gdb/m68k-tdep.c @@ -27,6 +27,7 @@ #include "gdb_string.h" #include "inferior.h" #include "regcache.h" +#include "arch-utils.h" #define P_LINKL_FP 0x480e @@ -41,6 +42,271 @@ #define P_FMOVM 0xf237 #define P_TRAP 0x4e40 + +/* 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. */ + +/* Note: Since they are used in files other than this (monitor files), + D0_REGNUM and A0_REGNUM are currently defined in tm-m68k.h. */ + +enum +{ + E_A1_REGNUM = 9, + E_FP_REGNUM = 14, /* Contains address of executing stack frame */ + E_SP_REGNUM = 15, /* Contains address of top of stack */ + E_PS_REGNUM = 16, /* Contains processor status */ + E_PC_REGNUM = 17, /* Contains program counter */ + E_FP0_REGNUM = 18, /* Floating point register 0 */ + E_FPC_REGNUM = 26, /* 68881 control register */ + E_FPS_REGNUM = 27, /* 68881 status register */ + E_FPI_REGNUM = 28 +}; + +#define REGISTER_BYTES_FP (16*4 + 8 + 8*12 + 3*4) +#define REGISTER_BYTES_NOFP (16*4 + 8) + +#define NUM_FREGS (NUM_REGS-24) + +/* Offset from SP to first arg on stack at first instruction of a function */ + +#define SP_ARG0 (1 * 4) + +/* 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 TARGET_M68K + + +#if !defined (BPT_VECTOR) +#define BPT_VECTOR 0xf +#endif + +#if !defined (REMOTE_BPT_VECTOR) +#define REMOTE_BPT_VECTOR 1 +#endif + + +void m68k_frame_init_saved_regs (struct frame_info *frame_info); + + +/* gdbarch_breakpoint_from_pc is set to m68k_local_breakpoint_from_pc + so m68k_remote_breakpoint_from_pc is currently not used. */ + +const static unsigned char * +m68k_remote_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) +{ + static unsigned char break_insn[] = {0x4e, (0x40 | REMOTE_BPT_VECTOR)}; + *lenptr = sizeof (break_insn); + return break_insn; +} + +const static unsigned char * +m68k_local_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) +{ + static unsigned char break_insn[] = {0x4e, (0x40 | BPT_VECTOR)}; + *lenptr = sizeof (break_insn); + return break_insn; +} + + +static int +m68k_register_bytes_ok (long numbytes) +{ + return ((numbytes == REGISTER_BYTES_FP) + || (numbytes == REGISTER_BYTES_NOFP)); +} + +/* Number of bytes of storage in the actual machine representation + for register regnum. 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 regnum < FP0_REGNUM */ + +static int +m68k_register_raw_size (int regnum) +{ + return (((unsigned) (regnum) - FP0_REGNUM) < 8 ? 12 : 4); +} + +/* Number of bytes of storage in the program's representation + for register regnum. On the 68000, all regs are 4 bytes + except the floating point regs which are 12-byte long doubles. */ + +static int +m68k_register_virtual_size (int regnum) +{ + return (((unsigned) (regnum) - FP0_REGNUM) < 8 ? 12 : 4); +} + +/* 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. */ + +static struct type * +m68k_register_virtual_type (int regnum) +{ + if ((unsigned) regnum >= E_FPC_REGNUM) + return lookup_pointer_type (builtin_type_void); + else if ((unsigned) regnum >= FP0_REGNUM) + return builtin_type_long_double; + else if ((unsigned) regnum >= A0_REGNUM) + return lookup_pointer_type (builtin_type_void); + else + return builtin_type_int; +} + +/* Function: m68k_register_name + Returns the name of the standard m68k register regnum. */ + +static const char * +m68k_register_name (int regnum) +{ + static char *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" + }; + + if (regnum < 0 || + regnum >= sizeof (register_names) / sizeof (register_names[0])) + internal_error (__FILE__, __LINE__, + "m68k_register_name: illegal register number %d", regnum); + else + return register_names[regnum]; +} + +/* Stack must be kept short aligned when doing function calls. */ + +static CORE_ADDR +m68k_stack_align (CORE_ADDR addr) +{ + return ((addr + 1) & ~1); +} + +/* Index within `registers' of the first byte of the space for + register regnum. */ + +static int +m68k_register_byte (int regnum) +{ + if (regnum >= E_FPC_REGNUM) + return (((regnum - E_FPC_REGNUM) * 4) + 168); + else if (regnum >= FP0_REGNUM) + return (((regnum - FP0_REGNUM) * 12) + 72); + else + return (regnum * 4); +} + +/* Store the address of the place in which to copy the structure the + subroutine will return. This is called from call_function. */ + +static void +m68k_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) +{ + write_register (E_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. */ + +static void +m68k_deprecated_extract_return_value (struct type *type, char *regbuf, + char *valbuf) +{ + int offset = 0; + int typeLength = TYPE_LENGTH (type); + + if (typeLength < 4) + offset = 4 - typeLength; + + memcpy (valbuf, regbuf + offset, typeLength); +} + +static CORE_ADDR +m68k_deprecated_extract_struct_value_address (char *regbuf) +{ + return (*(CORE_ADDR *) (regbuf)); +} + +/* Write into appropriate registers a function return value + of type TYPE, given in virtual format. Assumes floats are passed + in d0/d1. */ + +static void +m68k_store_return_value (struct type *type, char *valbuf) +{ + write_register_bytes (0, valbuf, TYPE_LENGTH (type)); +} + +/* 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. */ + +static CORE_ADDR +m68k_frame_chain (struct frame_info *thisframe) +{ + if (thisframe->signal_handler_caller) + return thisframe->frame; + else if (!inside_entry_file ((thisframe)->pc)) + return read_memory_integer ((thisframe)->frame, 4); + else + return 0; +} + +/* A function 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. */ + +static int +m68k_frameless_function_invocation (struct frame_info *fi) +{ + if (fi->signal_handler_caller) + return 0; + else + return frameless_look_for_prologue (fi); +} + +static CORE_ADDR +m68k_frame_saved_pc (struct frame_info *frame) +{ + if (frame->signal_handler_caller) + { + if (frame->next) + return read_memory_integer (frame->next->frame + SIG_PC_FP_OFFSET, 4); + else + return read_memory_integer (read_register (SP_REGNUM) + + SIG_PC_FP_OFFSET - 8, 4); + } + else + return read_memory_integer (frame->frame + 4, 4); +} + + /* The only reason this is here is the tm-altos.h reference below. It was moved back here from tm-m68k.h. FIXME? */ @@ -81,11 +347,11 @@ delta68_frame_args_address (struct frame_info *frame_info) return frame_info->frame + 12; else if (frameless_look_for_prologue (frame_info)) { - /* Check for an interrupted system call */ - if (frame_info->next && frame_info->next->signal_handler_caller) - return frame_info->next->frame + 16; - else - return frame_info->frame + 4; + /* Check for an interrupted system call */ + if (frame_info->next && frame_info->next->signal_handler_caller) + return frame_info->next->frame + 16; + else + return frame_info->frame + 4; } else return frame_info->frame; @@ -166,6 +432,20 @@ news_frame_num_args (struct frame_info *fi) return val; } +/* 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. */ + +void +m68k_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs, + struct value **args, struct type *type, int gcc_p) +{ + bfd_putb32 (fun, (unsigned char *) dummy + CALL_DUMMY_START_OFFSET + 2); + bfd_putb32 (nargs * 4, + (unsigned char *) dummy + CALL_DUMMY_START_OFFSET + 8); +} + + /* Push an empty stack frame, to record the current PC, etc. */ void @@ -204,29 +484,30 @@ m68k_pop_frame (void) register struct frame_info *frame = get_current_frame (); register CORE_ADDR fp; register int regnum; - struct frame_saved_regs fsr; char raw_buffer[12]; fp = FRAME_FP (frame); - get_frame_saved_regs (frame, &fsr); + m68k_frame_init_saved_regs (frame); for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) { - if (fsr.regs[regnum]) + if (frame->saved_regs[regnum]) { - read_memory (fsr.regs[regnum], raw_buffer, 12); + read_memory (frame->saved_regs[regnum], raw_buffer, 12); write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); } } for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) { - if (fsr.regs[regnum]) + if (frame->saved_regs[regnum]) { - write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); + write_register (regnum, + read_memory_integer (frame->saved_regs[regnum], 4)); } } - if (fsr.regs[PS_REGNUM]) + if (frame->saved_regs[PS_REGNUM]) { - write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4)); + write_register (PS_REGNUM, + read_memory_integer (frame->saved_regs[PS_REGNUM], 4)); } write_register (FP_REGNUM, read_memory_integer (fp, 4)); write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); @@ -278,7 +559,7 @@ m68k_skip_prologue (CORE_ADDR ip) If so, ensure we don't go past it. If not, assume "infinity". */ sal = find_pc_line (ip, 0); - limit = (sal.end) ? sal.end : (CORE_ADDR) ~ 0; + limit = (sal.end) ? sal.end : (CORE_ADDR) ~0; while (ip < limit) { @@ -298,14 +579,19 @@ m68k_skip_prologue (CORE_ADDR ip) else if (op == P_FMOVM) ip += 10; /* Skip fmovm */ else - break; /* Found unknown code, bail out. */ + break; /* Found unknown code, bail out. */ } return (ip); } +/* Store the addresses of the saved registers of the frame described by + FRAME_INFO in its saved_regs field. + 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. */ + void -m68k_find_saved_regs (struct frame_info *frame_info, - struct frame_saved_regs *saved_regs) +m68k_frame_init_saved_regs (struct frame_info *frame_info) { register int regnum; register int regmask; @@ -314,10 +600,17 @@ m68k_find_saved_regs (struct frame_info *frame_info, /* First possible address for a pc in a call dummy for this frame. */ CORE_ADDR possible_call_dummy_start = - (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 4 - 8 * 12; + (frame_info)->frame - 28 - FP_REGNUM * 4 - 4 - 8 * 12; int nextinsn; - memset (saved_regs, 0, sizeof (*saved_regs)); + + if (frame_info->saved_regs) + return; + + frame_saved_regs_zalloc (frame_info); + + memset (frame_info->saved_regs, 0, SIZEOF_FRAME_SAVED_REGS); + if ((frame_info)->pc >= possible_call_dummy_start && (frame_info)->pc <= (frame_info)->frame) { @@ -367,7 +660,7 @@ m68k_find_saved_regs (struct frame_info *frame_info, next_addr += read_memory_integer (pc += 2, 4), pc += 4; } - for ( ; ; ) + for (;;) { nextinsn = 0xffff & read_memory_integer (pc, 2); regmask = read_memory_integer (pc + 2, 2); @@ -377,7 +670,7 @@ m68k_find_saved_regs (struct frame_info *frame_info, /* Regmask's low bit is for register fp7, the first pushed */ for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1) if (regmask & 1) - saved_regs->regs[regnum] = (next_addr -= 12); + frame_info->saved_regs[regnum] = (next_addr -= 12); pc += 4; } /* fmovemx to (fp + displacement) */ @@ -390,7 +683,7 @@ m68k_find_saved_regs (struct frame_info *frame_info, for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1) if (regmask & 1) { - saved_regs->regs[regnum] = addr; + frame_info->saved_regs[regnum] = addr; addr += 12; } pc += 6; @@ -402,7 +695,7 @@ m68k_find_saved_regs (struct frame_info *frame_info, for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) if (regmask & 1) { - saved_regs->regs[regnum] = next_addr; + frame_info->saved_regs[regnum] = next_addr; next_addr += 4; } pc += 4; @@ -417,7 +710,7 @@ m68k_find_saved_regs (struct frame_info *frame_info, for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) if (regmask & 1) { - saved_regs->regs[regnum] = addr; + frame_info->saved_regs[regnum] = addr; addr += 4; } pc += 6; @@ -428,14 +721,14 @@ m68k_find_saved_regs (struct frame_info *frame_info, /* Regmask's low bit is for register 15, the first pushed */ for (regnum = 16; --regnum >= 0; regmask >>= 1) if (regmask & 1) - saved_regs->regs[regnum] = (next_addr -= 4); + frame_info->saved_regs[regnum] = (next_addr -= 4); pc += 4; } /* movl r,-(sp) */ else if (0x2f00 == (0xfff0 & nextinsn)) { regnum = 0xf & nextinsn; - saved_regs->regs[regnum] = (next_addr -= 4); + frame_info->saved_regs[regnum] = (next_addr -= 4); pc += 2; } /* fmovemx to index of sp */ @@ -445,7 +738,7 @@ m68k_find_saved_regs (struct frame_info *frame_info, for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1) if (regmask & 1) { - saved_regs->regs[regnum] = next_addr; + frame_info->saved_regs[regnum] = next_addr; next_addr += 12; } pc += 10; @@ -453,20 +746,21 @@ m68k_find_saved_regs (struct frame_info *frame_info, /* clrw -(sp); movw ccr,-(sp) */ else if (0x4267 == nextinsn && 0x42e7 == regmask) { - saved_regs->regs[PS_REGNUM] = (next_addr -= 4); + frame_info->saved_regs[PS_REGNUM] = (next_addr -= 4); pc += 4; } else break; } lose:; - saved_regs->regs[SP_REGNUM] = (frame_info)->frame + 8; - saved_regs->regs[FP_REGNUM] = (frame_info)->frame; - saved_regs->regs[PC_REGNUM] = (frame_info)->frame + 4; + frame_info->saved_regs[SP_REGNUM] = (frame_info)->frame + 8; + frame_info->saved_regs[FP_REGNUM] = (frame_info)->frame; + frame_info->saved_regs[PC_REGNUM] = (frame_info)->frame + 4; #ifdef SIG_SP_FP_OFFSET /* Adjust saved SP_REGNUM for fake _sigtramp frames. */ if (frame_info->signal_handler_caller && frame_info->next) - saved_regs->regs[SP_REGNUM] = frame_info->next->frame + SIG_SP_FP_OFFSET; + frame_info->saved_regs[SP_REGNUM] = + frame_info->next->frame + SIG_SP_FP_OFFSET; #endif } @@ -567,14 +861,14 @@ supply_fpregset (fpregset_t *fpregsetp) register int regi; char *from; - for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++) + for (regi = FP0_REGNUM; regi < E_FPC_REGNUM; regi++) { from = (char *) &(fpregsetp->f_fpregs[regi - FP0_REGNUM][0]); supply_register (regi, from); } - supply_register (FPC_REGNUM, (char *) &(fpregsetp->f_pcr)); - supply_register (FPS_REGNUM, (char *) &(fpregsetp->f_psr)); - supply_register (FPI_REGNUM, (char *) &(fpregsetp->f_fpiaddr)); + supply_register (E_FPC_REGNUM, (char *) &(fpregsetp->f_pcr)); + supply_register (E_FPS_REGNUM, (char *) &(fpregsetp->f_psr)); + supply_register (E_FPI_REGNUM, (char *) &(fpregsetp->f_fpiaddr)); } /* Given a pointer to a floating point register set in /proc format @@ -589,7 +883,7 @@ fill_fpregset (fpregset_t *fpregsetp, int regno) char *to; char *from; - for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++) + for (regi = FP0_REGNUM; regi < E_FPC_REGNUM; regi++) { if ((regno == -1) || (regno == regi)) { @@ -598,17 +892,17 @@ fill_fpregset (fpregset_t *fpregsetp, int regno) memcpy (to, from, REGISTER_RAW_SIZE (regi)); } } - if ((regno == -1) || (regno == FPC_REGNUM)) + if ((regno == -1) || (regno == E_FPC_REGNUM)) { - fpregsetp->f_pcr = *(int *) ®isters[REGISTER_BYTE (FPC_REGNUM)]; + fpregsetp->f_pcr = *(int *) ®isters[REGISTER_BYTE (E_FPC_REGNUM)]; } - if ((regno == -1) || (regno == FPS_REGNUM)) + if ((regno == -1) || (regno == E_FPS_REGNUM)) { - fpregsetp->f_psr = *(int *) ®isters[REGISTER_BYTE (FPS_REGNUM)]; + fpregsetp->f_psr = *(int *) ®isters[REGISTER_BYTE (E_FPS_REGNUM)]; } - if ((regno == -1) || (regno == FPI_REGNUM)) + if ((regno == -1) || (regno == E_FPI_REGNUM)) { - fpregsetp->f_fpiaddr = *(int *) ®isters[REGISTER_BYTE (FPI_REGNUM)]; + fpregsetp->f_fpiaddr = *(int *) ®isters[REGISTER_BYTE (E_FPI_REGNUM)]; } } @@ -636,9 +930,8 @@ m68k_get_longjmp_target (CORE_ADDR *pc) buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT); sp = read_register (SP_REGNUM); - if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */ - buf, - TARGET_PTR_BIT / TARGET_CHAR_BIT)) + if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */ + buf, TARGET_PTR_BIT / TARGET_CHAR_BIT)) return 0; jb_addr = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); @@ -677,9 +970,112 @@ m68k_saved_pc_after_call (struct frame_info *frame) return read_memory_integer (read_register (SP_REGNUM), 4); } +/* Function: m68k_gdbarch_init + Initializer function for the m68k gdbarch vector. + Called by gdbarch. Sets up the gdbarch vector(s) for this target. */ + +static struct gdbarch * +m68k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) +{ + static LONGEST call_dummy_words[7] = { 0xf227e0ff, 0x48e7fffc, 0x426742e7, + 0x4eb93232, 0x3232dffc, 0x69696969, + (0x4e404e71 | (BPT_VECTOR << 16)) + }; + struct gdbarch_tdep *tdep = NULL; + struct gdbarch *gdbarch; + + /* find a candidate among the list of pre-declared architectures. */ + arches = gdbarch_list_lookup_by_info (arches, &info); + if (arches != NULL) + return (arches->gdbarch); + +#if 0 + tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); +#endif + + gdbarch = gdbarch_alloc (&info, 0); + + set_gdbarch_long_double_format (gdbarch, &floatformat_m68881_ext); + set_gdbarch_long_double_bit (gdbarch, 96); + + set_gdbarch_function_start_offset (gdbarch, 0); + + set_gdbarch_skip_prologue (gdbarch, m68k_skip_prologue); + set_gdbarch_saved_pc_after_call (gdbarch, m68k_saved_pc_after_call); + set_gdbarch_breakpoint_from_pc (gdbarch, m68k_local_breakpoint_from_pc); + + /* Stack grows down. */ + set_gdbarch_inner_than (gdbarch, core_addr_lessthan); + set_gdbarch_stack_align (gdbarch, m68k_stack_align); + + + set_gdbarch_believe_pcc_promotion (gdbarch, 1); + set_gdbarch_decr_pc_after_break (gdbarch, 2); + + set_gdbarch_store_struct_return (gdbarch, m68k_store_struct_return); + set_gdbarch_deprecated_extract_return_value (gdbarch, + m68k_deprecated_extract_return_value); + set_gdbarch_deprecated_store_return_value (gdbarch, m68k_store_return_value); + + set_gdbarch_frame_chain (gdbarch, m68k_frame_chain); + set_gdbarch_frame_chain_valid (gdbarch, generic_func_frame_chain_valid); + set_gdbarch_frame_saved_pc (gdbarch, m68k_frame_saved_pc); + set_gdbarch_frame_init_saved_regs (gdbarch, m68k_frame_init_saved_regs); + set_gdbarch_frameless_function_invocation (gdbarch, + m68k_frameless_function_invocation); + /* OK to default this value to 'unknown'. */ + set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); + set_gdbarch_frame_args_skip (gdbarch, 8); + set_gdbarch_frame_args_address (gdbarch, default_frame_address); + set_gdbarch_frame_locals_address (gdbarch, default_frame_address); + + set_gdbarch_register_raw_size (gdbarch, m68k_register_raw_size); + set_gdbarch_register_virtual_size (gdbarch, m68k_register_virtual_size); + set_gdbarch_max_register_raw_size (gdbarch, 12); + set_gdbarch_max_register_virtual_size (gdbarch, 12); + set_gdbarch_register_virtual_type (gdbarch, m68k_register_virtual_type); + set_gdbarch_register_name (gdbarch, m68k_register_name); + set_gdbarch_register_size (gdbarch, 4); + set_gdbarch_register_byte (gdbarch, m68k_register_byte); + set_gdbarch_num_regs (gdbarch, 29); + set_gdbarch_register_bytes_ok (gdbarch, m68k_register_bytes_ok); + set_gdbarch_register_bytes (gdbarch, (16 * 4 + 8 + 8 * 12 + 3 * 4)); + set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM); + set_gdbarch_fp_regnum (gdbarch, E_FP_REGNUM); + set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM); + set_gdbarch_ps_regnum (gdbarch, E_PS_REGNUM); + set_gdbarch_fp0_regnum (gdbarch, E_FP0_REGNUM); + + set_gdbarch_use_generic_dummy_frames (gdbarch, 0); + set_gdbarch_call_dummy_location (gdbarch, ON_STACK); + set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); + set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 24); + set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_on_stack); + set_gdbarch_call_dummy_p (gdbarch, 1); + set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); + set_gdbarch_call_dummy_length (gdbarch, 28); + set_gdbarch_call_dummy_start_offset (gdbarch, 12); + + set_gdbarch_call_dummy_words (gdbarch, call_dummy_words); + set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (call_dummy_words)); + set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); + set_gdbarch_fix_call_dummy (gdbarch, m68k_fix_call_dummy); + set_gdbarch_push_dummy_frame (gdbarch, m68k_push_dummy_frame); + set_gdbarch_pop_frame (gdbarch, m68k_pop_frame); + + return gdbarch; +} + + +static void +m68k_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) +{ + +} void _initialize_m68k_tdep (void) { + gdbarch_register (bfd_arch_m68k, m68k_gdbarch_init, m68k_dump_tdep); tm_print_insn = print_insn_m68k; } |