| /* Target dependent code for the Motorola 68000 series. |
| Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001 |
| 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. */ |
| |
| #include "defs.h" |
| #include "frame.h" |
| #include "symtab.h" |
| #include "gdbcore.h" |
| #include "value.h" |
| #include "gdb_string.h" |
| #include "inferior.h" |
| #include "regcache.h" |
| |
| |
| #define P_LINKL_FP 0x480e |
| #define P_LINKW_FP 0x4e56 |
| #define P_PEA_FP 0x4856 |
| #define P_MOVL_SP_FP 0x2c4f |
| #define P_MOVL 0x207c |
| #define P_JSR 0x4eb9 |
| #define P_BSR 0x61ff |
| #define P_LEAL 0x43fb |
| #define P_MOVML 0x48ef |
| #define P_FMOVM 0xf237 |
| #define P_TRAP 0x4e40 |
| |
| /* The only reason this is here is the tm-altos.h reference below. It |
| was moved back here from tm-m68k.h. FIXME? */ |
| |
| extern CORE_ADDR |
| altos_skip_prologue (CORE_ADDR pc) |
| { |
| register int op = read_memory_integer (pc, 2); |
| if (op == P_LINKW_FP) |
| pc += 4; /* Skip link #word */ |
| else if (op == P_LINKL_FP) |
| pc += 6; /* Skip link #long */ |
| /* Not sure why branches are here. */ |
| /* From tm-altos.h */ |
| else if (op == 0060000) |
| pc += 4; /* Skip bra #word */ |
| else if (op == 00600377) |
| pc += 6; /* skip bra #long */ |
| else if ((op & 0177400) == 0060000) |
| pc += 2; /* skip bra #char */ |
| return pc; |
| } |
| |
| int |
| delta68_in_sigtramp (CORE_ADDR pc, char *name) |
| { |
| if (name != NULL) |
| return strcmp (name, "_sigcode") == 0; |
| else |
| return 0; |
| } |
| |
| CORE_ADDR |
| delta68_frame_args_address (struct frame_info *frame_info) |
| { |
| /* we assume here that the only frameless functions are the system calls |
| or other functions who do not put anything on the stack. */ |
| if (frame_info->signal_handler_caller) |
| 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; |
| } |
| else |
| return frame_info->frame; |
| } |
| |
| CORE_ADDR |
| delta68_frame_saved_pc (struct frame_info *frame_info) |
| { |
| return read_memory_integer (delta68_frame_args_address (frame_info) + 4, 4); |
| } |
| |
| /* Return number of args passed to a frame. |
| Can return -1, meaning no way to tell. */ |
| |
| int |
| isi_frame_num_args (struct frame_info *fi) |
| { |
| int val; |
| CORE_ADDR pc = FRAME_SAVED_PC (fi); |
| int insn = 0177777 & read_memory_integer (pc, 2); |
| val = 0; |
| if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ |
| val = read_memory_integer (pc + 2, 2); |
| else if ((insn & 0170777) == 0050217 /* addql #N, sp */ |
| || (insn & 0170777) == 0050117) /* addqw */ |
| { |
| val = (insn >> 9) & 7; |
| if (val == 0) |
| val = 8; |
| } |
| else if (insn == 0157774) /* addal #WW, sp */ |
| val = read_memory_integer (pc + 2, 4); |
| val >>= 2; |
| return val; |
| } |
| |
| int |
| delta68_frame_num_args (struct frame_info *fi) |
| { |
| int val; |
| CORE_ADDR pc = FRAME_SAVED_PC (fi); |
| int insn = 0177777 & read_memory_integer (pc, 2); |
| val = 0; |
| if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ |
| val = read_memory_integer (pc + 2, 2); |
| else if ((insn & 0170777) == 0050217 /* addql #N, sp */ |
| || (insn & 0170777) == 0050117) /* addqw */ |
| { |
| val = (insn >> 9) & 7; |
| if (val == 0) |
| val = 8; |
| } |
| else if (insn == 0157774) /* addal #WW, sp */ |
| val = read_memory_integer (pc + 2, 4); |
| val >>= 2; |
| return val; |
| } |
| |
| int |
| news_frame_num_args (struct frame_info *fi) |
| { |
| int val; |
| CORE_ADDR pc = FRAME_SAVED_PC (fi); |
| int insn = 0177777 & read_memory_integer (pc, 2); |
| val = 0; |
| if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ |
| val = read_memory_integer (pc + 2, 2); |
| else if ((insn & 0170777) == 0050217 /* addql #N, sp */ |
| || (insn & 0170777) == 0050117) /* addqw */ |
| { |
| val = (insn >> 9) & 7; |
| if (val == 0) |
| val = 8; |
| } |
| else if (insn == 0157774) /* addal #WW, sp */ |
| val = read_memory_integer (pc + 2, 4); |
| val >>= 2; |
| return val; |
| } |
| |
| /* Push an empty stack frame, to record the current PC, etc. */ |
| |
| void |
| m68k_push_dummy_frame (void) |
| { |
| register CORE_ADDR sp = read_register (SP_REGNUM); |
| register int regnum; |
| char raw_buffer[12]; |
| |
| sp = push_word (sp, read_register (PC_REGNUM)); |
| sp = push_word (sp, read_register (FP_REGNUM)); |
| write_register (FP_REGNUM, sp); |
| |
| /* Always save the floating-point registers, whether they exist on |
| this target or not. */ |
| for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) |
| { |
| read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); |
| sp = push_bytes (sp, raw_buffer, 12); |
| } |
| |
| for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) |
| { |
| sp = push_word (sp, read_register (regnum)); |
| } |
| sp = push_word (sp, read_register (PS_REGNUM)); |
| write_register (SP_REGNUM, sp); |
| } |
| |
| /* Discard from the stack the innermost frame, |
| restoring all saved registers. */ |
| |
| void |
| 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); |
| for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) |
| { |
| if (fsr.regs[regnum]) |
| { |
| read_memory (fsr.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]) |
| { |
| write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); |
| } |
| } |
| if (fsr.regs[PS_REGNUM]) |
| { |
| write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4)); |
| } |
| write_register (FP_REGNUM, read_memory_integer (fp, 4)); |
| write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); |
| write_register (SP_REGNUM, fp + 8); |
| flush_cached_frames (); |
| } |
| |
| |
| /* Given an ip value corresponding to the start of a function, |
| return the ip of the first instruction after the function |
| prologue. This is the generic m68k support. Machines which |
| require something different can override the SKIP_PROLOGUE |
| macro to point elsewhere. |
| |
| Some instructions which typically may appear in a function |
| prologue include: |
| |
| A link instruction, word form: |
| |
| link.w %a6,&0 4e56 XXXX |
| |
| A link instruction, long form: |
| |
| link.l %fp,&F%1 480e XXXX XXXX |
| |
| A movm instruction to preserve integer regs: |
| |
| movm.l &M%1,(4,%sp) 48ef XXXX XXXX |
| |
| A fmovm instruction to preserve float regs: |
| |
| fmovm &FPM%1,(FPO%1,%sp) f237 XXXX XXXX XXXX XXXX |
| |
| Some profiling setup code (FIXME, not recognized yet): |
| |
| lea.l (.L3,%pc),%a1 43fb XXXX XXXX XXXX |
| bsr _mcount 61ff XXXX XXXX |
| |
| */ |
| |
| CORE_ADDR |
| m68k_skip_prologue (CORE_ADDR ip) |
| { |
| register CORE_ADDR limit; |
| struct symtab_and_line sal; |
| register int op; |
| |
| /* Find out if there is a known limit for the extent of the prologue. |
| 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; |
| |
| while (ip < limit) |
| { |
| op = read_memory_integer (ip, 2); |
| op &= 0xFFFF; |
| |
| if (op == P_LINKW_FP) |
| ip += 4; /* Skip link.w */ |
| else if (op == P_PEA_FP) |
| ip += 2; /* Skip pea %fp */ |
| else if (op == P_MOVL_SP_FP) |
| ip += 2; /* Skip move.l %sp, %fp */ |
| else if (op == P_LINKL_FP) |
| ip += 6; /* Skip link.l */ |
| else if (op == P_MOVML) |
| ip += 6; /* Skip movm.l */ |
| else if (op == P_FMOVM) |
| ip += 10; /* Skip fmovm */ |
| else |
| break; /* Found unknown code, bail out. */ |
| } |
| return (ip); |
| } |
| |
| void |
| m68k_find_saved_regs (struct frame_info *frame_info, |
| struct frame_saved_regs *saved_regs) |
| { |
| register int regnum; |
| register int regmask; |
| register CORE_ADDR next_addr; |
| register CORE_ADDR pc; |
| |
| /* 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; |
| |
| int nextinsn; |
| memset (saved_regs, 0, sizeof (*saved_regs)); |
| if ((frame_info)->pc >= possible_call_dummy_start |
| && (frame_info)->pc <= (frame_info)->frame) |
| { |
| |
| /* It is a call dummy. We could just stop now, since we know |
| what the call dummy saves and where. But this code proceeds |
| to parse the "prologue" which is part of the call dummy. |
| This is needlessly complex and confusing. FIXME. */ |
| |
| next_addr = (frame_info)->frame; |
| pc = possible_call_dummy_start; |
| } |
| else |
| { |
| pc = get_pc_function_start ((frame_info)->pc); |
| |
| nextinsn = read_memory_integer (pc, 2); |
| if (P_PEA_FP == nextinsn |
| && P_MOVL_SP_FP == read_memory_integer (pc + 2, 2)) |
| { |
| /* pea %fp |
| move.l %sp, %fp */ |
| next_addr = frame_info->frame; |
| pc += 4; |
| } |
| else if (P_LINKL_FP == nextinsn) |
| /* link.l %fp */ |
| /* Find the address above the saved |
| regs using the amount of storage from the link instruction. */ |
| { |
| next_addr = (frame_info)->frame + read_memory_integer (pc + 2, 4); |
| pc += 6; |
| } |
| else if (P_LINKW_FP == nextinsn) |
| /* link.w %fp */ |
| /* Find the address above the saved |
| regs using the amount of storage from the link instruction. */ |
| { |
| next_addr = (frame_info)->frame + read_memory_integer (pc + 2, 2); |
| pc += 4; |
| } |
| else |
| goto lose; |
| |
| /* If have an addal #-n, sp next, adjust next_addr. */ |
| if ((0177777 & read_memory_integer (pc, 2)) == 0157774) |
| next_addr += read_memory_integer (pc += 2, 4), pc += 4; |
| } |
| |
| for ( ; ; ) |
| { |
| nextinsn = 0xffff & read_memory_integer (pc, 2); |
| regmask = read_memory_integer (pc + 2, 2); |
| /* fmovemx to -(sp) */ |
| if (0xf227 == nextinsn && (regmask & 0xff00) == 0xe000) |
| { |
| /* 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); |
| pc += 4; |
| } |
| /* fmovemx to (fp + displacement) */ |
| else if (0171056 == nextinsn && (regmask & 0xff00) == 0xf000) |
| { |
| register CORE_ADDR addr; |
| |
| addr = (frame_info)->frame + read_memory_integer (pc + 4, 2); |
| /* 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] = addr; |
| addr += 12; |
| } |
| pc += 6; |
| } |
| /* moveml to (sp) */ |
| else if (0044327 == nextinsn) |
| { |
| /* Regmask's low bit is for register 0, the first written */ |
| for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) |
| if (regmask & 1) |
| { |
| saved_regs->regs[regnum] = next_addr; |
| next_addr += 4; |
| } |
| pc += 4; |
| } |
| /* moveml to (fp + displacement) */ |
| else if (0044356 == nextinsn) |
| { |
| register CORE_ADDR addr; |
| |
| addr = (frame_info)->frame + read_memory_integer (pc + 4, 2); |
| /* Regmask's low bit is for register 0, the first written */ |
| for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) |
| if (regmask & 1) |
| { |
| saved_regs->regs[regnum] = addr; |
| addr += 4; |
| } |
| pc += 6; |
| } |
| /* moveml to -(sp) */ |
| else if (0044347 == nextinsn) |
| { |
| /* 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); |
| pc += 4; |
| } |
| /* movl r,-(sp) */ |
| else if (0x2f00 == (0xfff0 & nextinsn)) |
| { |
| regnum = 0xf & nextinsn; |
| saved_regs->regs[regnum] = (next_addr -= 4); |
| pc += 2; |
| } |
| /* fmovemx to index of sp */ |
| else if (0xf236 == nextinsn && (regmask & 0xff00) == 0xf000) |
| { |
| /* Regmask's low bit is for register fp0, the first written */ |
| for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1) |
| if (regmask & 1) |
| { |
| saved_regs->regs[regnum] = next_addr; |
| next_addr += 12; |
| } |
| pc += 10; |
| } |
| /* clrw -(sp); movw ccr,-(sp) */ |
| else if (0x4267 == nextinsn && 0x42e7 == regmask) |
| { |
| saved_regs->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; |
| #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; |
| #endif |
| } |
| |
| |
| #ifdef USE_PROC_FS /* Target dependent support for /proc */ |
| |
| #include <sys/procfs.h> |
| |
| /* Prototypes for supply_gregset etc. */ |
| #include "gregset.h" |
| |
| /* The /proc interface divides the target machine's register set up into |
| two different sets, the general register set (gregset) and the floating |
| point register set (fpregset). For each set, there is an ioctl to get |
| the current register set and another ioctl to set the current values. |
| |
| The actual structure passed through the ioctl interface is, of course, |
| naturally machine dependent, and is different for each set of registers. |
| For the m68k for example, the general register set is typically defined |
| by: |
| |
| typedef int gregset_t[18]; |
| |
| #define R_D0 0 |
| ... |
| #define R_PS 17 |
| |
| and the floating point set by: |
| |
| typedef struct fpregset { |
| int f_pcr; |
| int f_psr; |
| int f_fpiaddr; |
| int f_fpregs[8][3]; (8 regs, 96 bits each) |
| } fpregset_t; |
| |
| These routines provide the packing and unpacking of gregset_t and |
| fpregset_t formatted data. |
| |
| */ |
| |
| /* Atari SVR4 has R_SR but not R_PS */ |
| |
| #if !defined (R_PS) && defined (R_SR) |
| #define R_PS R_SR |
| #endif |
| |
| /* Given a pointer to a general register set in /proc format (gregset_t *), |
| unpack the register contents and supply them as gdb's idea of the current |
| register values. */ |
| |
| void |
| supply_gregset (gregset_t *gregsetp) |
| { |
| register int regi; |
| register greg_t *regp = (greg_t *) gregsetp; |
| |
| for (regi = 0; regi < R_PC; regi++) |
| { |
| supply_register (regi, (char *) (regp + regi)); |
| } |
| supply_register (PS_REGNUM, (char *) (regp + R_PS)); |
| supply_register (PC_REGNUM, (char *) (regp + R_PC)); |
| } |
| |
| void |
| fill_gregset (gregset_t *gregsetp, int regno) |
| { |
| register int regi; |
| register greg_t *regp = (greg_t *) gregsetp; |
| |
| for (regi = 0; regi < R_PC; regi++) |
| { |
| if ((regno == -1) || (regno == regi)) |
| { |
| *(regp + regi) = *(int *) ®isters[REGISTER_BYTE (regi)]; |
| } |
| } |
| if ((regno == -1) || (regno == PS_REGNUM)) |
| { |
| *(regp + R_PS) = *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)]; |
| } |
| if ((regno == -1) || (regno == PC_REGNUM)) |
| { |
| *(regp + R_PC) = *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)]; |
| } |
| } |
| |
| #if defined (FP0_REGNUM) |
| |
| /* Given a pointer to a floating point register set in /proc format |
| (fpregset_t *), unpack the register contents and supply them as gdb's |
| idea of the current floating point register values. */ |
| |
| void |
| supply_fpregset (fpregset_t *fpregsetp) |
| { |
| register int regi; |
| char *from; |
| |
| for (regi = FP0_REGNUM; regi < 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)); |
| } |
| |
| /* Given a pointer to a floating point register set in /proc format |
| (fpregset_t *), update the register specified by REGNO from gdb's idea |
| of the current floating point register set. If REGNO is -1, update |
| them all. */ |
| |
| void |
| fill_fpregset (fpregset_t *fpregsetp, int regno) |
| { |
| int regi; |
| char *to; |
| char *from; |
| |
| for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++) |
| { |
| if ((regno == -1) || (regno == regi)) |
| { |
| from = (char *) ®isters[REGISTER_BYTE (regi)]; |
| to = (char *) &(fpregsetp->f_fpregs[regi - FP0_REGNUM][0]); |
| memcpy (to, from, REGISTER_RAW_SIZE (regi)); |
| } |
| } |
| if ((regno == -1) || (regno == FPC_REGNUM)) |
| { |
| fpregsetp->f_pcr = *(int *) ®isters[REGISTER_BYTE (FPC_REGNUM)]; |
| } |
| if ((regno == -1) || (regno == FPS_REGNUM)) |
| { |
| fpregsetp->f_psr = *(int *) ®isters[REGISTER_BYTE (FPS_REGNUM)]; |
| } |
| if ((regno == -1) || (regno == FPI_REGNUM)) |
| { |
| fpregsetp->f_fpiaddr = *(int *) ®isters[REGISTER_BYTE (FPI_REGNUM)]; |
| } |
| } |
| |
| #endif /* defined (FP0_REGNUM) */ |
| |
| #endif /* USE_PROC_FS */ |
| |
| /* 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 PC. |
| This routine returns true on success. */ |
| |
| /* NOTE: cagney/2000-11-08: For this function to be fully multi-arched |
| the macro's JB_PC and JB_ELEMENT_SIZE would need to be moved into |
| the ``struct gdbarch_tdep'' object and then set on a target ISA/ABI |
| dependant basis. */ |
| |
| int |
| m68k_get_longjmp_target (CORE_ADDR *pc) |
| { |
| #if defined (JB_PC) && defined (JB_ELEMENT_SIZE) |
| char *buf; |
| CORE_ADDR sp, jb_addr; |
| |
| 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)) |
| return 0; |
| |
| jb_addr = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); |
| |
| if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, |
| TARGET_PTR_BIT / TARGET_CHAR_BIT)) |
| return 0; |
| |
| *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); |
| |
| return 1; |
| #else |
| internal_error (__FILE__, __LINE__, |
| "m68k_get_longjmp_target: not implemented"); |
| return 0; |
| #endif |
| } |
| |
| /* Immediately after a function call, return the saved pc before the frame |
| is setup. For sun3's, we check for the common case of being inside of a |
| system call, and if so, we know that Sun pushes the call # on the stack |
| prior to doing the trap. */ |
| |
| CORE_ADDR |
| m68k_saved_pc_after_call (struct frame_info *frame) |
| { |
| #ifdef SYSCALL_TRAP |
| int op; |
| |
| op = read_memory_integer (frame->pc - SYSCALL_TRAP_OFFSET, 2); |
| |
| if (op == SYSCALL_TRAP) |
| return read_memory_integer (read_register (SP_REGNUM) + 4, 4); |
| else |
| #endif /* SYSCALL_TRAP */ |
| return read_memory_integer (read_register (SP_REGNUM), 4); |
| } |
| |
| |
| void |
| _initialize_m68k_tdep (void) |
| { |
| tm_print_insn = print_insn_m68k; |
| } |