/* Target dependent code for the Motorola 68000 series.
- Copyright (C) 1990, 1992 Free Software Foundation, Inc.
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ 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 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.
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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"
\f
-/* Things needed for making the inferior call functions.
- It seems like every m68k based machine has almost identical definitions
- in the individual machine's configuration files. Most other cpu types
- (mips, i386, etc) have routines in their *-tdep.c files to handle this
- for most configurations. The m68k family should be able to do this as
- well. These macros can still be overridden when necessary. */
+
+#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-isi.h, 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;
+}
+
+/* The only reason this is here is the tm-isi.h reference below. It
+ was moved back here from tm-m68k.h. FIXME? */
+
+extern CORE_ADDR
+isi_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-isi.h, 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 ()
+m68k_push_dummy_frame (void)
{
register CORE_ADDR sp = read_register (SP_REGNUM);
register int regnum;
sp = push_word (sp, read_register (PC_REGNUM));
sp = push_word (sp, read_register (FP_REGNUM));
write_register (FP_REGNUM, sp);
-#if defined (HAVE_68881)
+
+ /* 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);
}
-#endif
+
for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--)
{
sp = push_word (sp, read_register (regnum));
restoring all saved registers. */
void
-m68k_pop_frame ()
+m68k_pop_frame (void)
{
- register FRAME frame = get_current_frame ();
+ register struct frame_info *frame = get_current_frame ();
register CORE_ADDR fp;
register int regnum;
struct frame_saved_regs fsr;
- struct frame_info *fi;
char raw_buffer[12];
- fi = get_frame_info (frame);
- fp = fi -> frame;
- get_frame_saved_regs (fi, &fsr);
-#if defined (HAVE_68881)
- for (regnum = FP0_REGNUM + 7 ; regnum >= FP0_REGNUM ; regnum--)
+ fp = FRAME_FP (frame);
+ get_frame_saved_regs (frame, &fsr);
+ for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--)
{
if (fsr.regs[regnum])
{
write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12);
}
}
-#endif
- for (regnum = FP_REGNUM - 1 ; regnum >= 0 ; regnum--)
+ for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--)
{
if (fsr.regs[regnum])
{
write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));
write_register (SP_REGNUM, fp + 8);
flush_cached_frames ();
- set_current_frame (create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
}
-
\f
+
/* 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
A link instruction, word form:
- link.w %a6,&0 4e56 XXXX
+ link.w %a6,&0 4e56 XXXX
A link instruction, long form:
- link.l %fp,&F%1 480e XXXX XXXX
+ link.l %fp,&F%1 480e XXXX XXXX
A movm instruction to preserve integer regs:
- movm.l &M%1,(4,%sp) 48ef XXXX XXXX
+ 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
+ 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
-
- */
+ lea.l (.L3,%pc),%a1 43fb XXXX XXXX XXXX
+ bsr _mcount 61ff XXXX XXXX
-#define P_LINK_L 0x480e
-#define P_LINK_W 0x4e56
-#define P_MOV_L 0x207c
-#define P_JSR 0x4eb9
-#define P_BSR 0x61ff
-#define P_LEA_L 0x43fb
-#define P_MOVM_L 0x48ef
-#define P_FMOVM 0xf237
-#define P_TRAP 0x4e40
+ */
CORE_ADDR
-m68k_skip_prologue (ip)
-CORE_ADDR ip;
+m68k_skip_prologue (CORE_ADDR ip)
{
register CORE_ADDR limit;
struct symtab_and_line sal;
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)
{
op = read_memory_integer (ip, 2);
op &= 0xFFFF;
-
- if (op == P_LINK_W)
- {
- ip += 4; /* Skip link.w */
- }
- else if (op == P_LINK_L)
- {
- ip += 6; /* Skip link.l */
- }
- else if (op == P_MOVM_L)
- {
- ip += 6; /* Skip movm.l */
- }
+
+ 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 */
- }
+ ip += 10; /* Skip fmovm */
else
- {
- break; /* Found unknown code, bail out. */
- }
+ break; /* Found unknown code, bail out. */
}
return (ip);
}
void
-m68k_find_saved_regs (frame_info, saved_regs)
- struct frame_info *frame_info;
- struct frame_saved_regs *saved_regs;
+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 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
-#if defined (HAVE_68881)
- - 8*12
-#endif
- ;
+ (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 4 - 8 * 12;
int nextinsn;
memset (saved_regs, 0, sizeof (*saved_regs));
{
/* 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, confusing, and also is the only
- reason that the call dummy is customized based on HAVE_68881.
- FIXME. */
+ 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);
- /* Verify we have a link a6 instruction next;
- if not we lose. If we win, find the address above the saved
- regs using the amount of storage from the link instruction. */
- if (044016 == read_memory_integer (pc, 2))
- next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 4), pc+=4;
- else if (047126 == read_memory_integer (pc, 2))
- next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 2), pc+=2;
- 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;
- }
- regmask = read_memory_integer (pc + 2, 2);
-#if defined (HAVE_68881)
- /* Here can come an fmovem. Check for it. */
- nextinsn = 0xffff & read_memory_integer (pc, 2);
- if (0xf227 == nextinsn
- && (regmask & 0xff00) == 0xe000)
- { pc += 4; /* Regmask's low bit is for register fp7, the first pushed */
- for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--, regmask >>= 1)
- if (regmask & 1)
- saved_regs->regs[regnum] = (next_addr -= 12);
- regmask = read_memory_integer (pc + 2, 2); }
-#endif
- /* next should be a moveml to (sp) or -(sp) or a movl r,-(sp) */
- if (0044327 == read_memory_integer (pc, 2))
- { pc += 4; /* 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 += 4) - 4; }
- else if (0044347 == read_memory_integer (pc, 2))
+ else
{
- pc += 4; /* Regmask's low bit is for register 15, the first pushed */
- for (regnum = 15; regnum >= 0; regnum--, regmask >>= 1)
- if (regmask & 1)
- saved_regs->regs[regnum] = (next_addr -= 4);
+ 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;
}
- else if (0x2f00 == (0xfff0 & read_memory_integer (pc, 2)))
+
+ for ( ; ; )
{
- regnum = 0xf & read_memory_integer (pc, 2); pc += 2;
- saved_regs->regs[regnum] = (next_addr -= 4);
- /* gcc, at least, may use a pair of movel instructions when saving
- exactly 2 registers. */
- if (0x2f00 == (0xfff0 & read_memory_integer (pc, 2)))
+ nextinsn = 0xffff & read_memory_integer (pc, 2);
+ regmask = read_memory_integer (pc + 2, 2);
+ /* fmovemx to -(sp) */
+ if (0xf227 == nextinsn && (regmask & 0xff00) == 0xe000)
{
- regnum = 0xf & read_memory_integer (pc, 2);
- pc += 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] = (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;
}
-#if defined (HAVE_68881)
- /* fmovemx to index of sp may follow. */
- regmask = read_memory_integer (pc + 2, 2);
- nextinsn = 0xffff & read_memory_integer (pc, 2);
- if (0xf236 == nextinsn
- && (regmask & 0xff00) == 0xf000)
- { pc += 10; /* Regmask's low bit is for register fp0, the first written */
- for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--, regmask >>= 1)
- if (regmask & 1)
- saved_regs->regs[regnum] = (next_addr += 12) - 12;
- regmask = read_memory_integer (pc + 2, 2); }
-#endif
- /* clrw -(sp); movw ccr,-(sp) may follow. */
- if (0x426742e7 == read_memory_integer (pc, 4))
- saved_regs->regs[PS_REGNUM] = (next_addr -= 4);
- 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;
+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)
}
-#ifdef USE_PROC_FS /* Target dependent support for /proc */
+#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.
+ 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:
+ 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];
+ typedef int gregset_t[18];
- #define R_D0 0
- ...
- #define R_PS 17
+ #define R_D0 0
+ ...
+ #define R_PS 17
- and the floating point set by:
+ 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;
+ 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.
+ 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. */
+ unpack the register contents and supply them as gdb's idea of the current
+ register values. */
void
-supply_gregset (gregsetp)
-gregset_t *gregsetp;
+supply_gregset (gregset_t *gregsetp)
{
register int regi;
register greg_t *regp = (greg_t *) gregsetp;
- for (regi = 0 ; regi < R_PC ; regi++)
+ for (regi = 0; regi < R_PC; regi++)
{
supply_register (regi, (char *) (regp + regi));
}
}
void
-fill_gregset (gregsetp, regno)
-gregset_t *gregsetp;
-int regno;
+fill_gregset (gregset_t *gregsetp, int regno)
{
register int regi;
register greg_t *regp = (greg_t *) gregsetp;
- extern char registers[];
- for (regi = 0 ; regi < R_PC ; regi++)
+ for (regi = 0; regi < R_PC; regi++)
{
if ((regno == -1) || (regno == regi))
{
#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. */
+ (fpregset_t *), unpack the register contents and supply them as gdb's
+ idea of the current floating point register values. */
-void
-supply_fpregset (fpregsetp)
-fpregset_t *fpregsetp;
+void
+supply_fpregset (fpregset_t *fpregsetp)
{
register int regi;
char *from;
-
- for (regi = FP0_REGNUM ; regi < FPC_REGNUM ; regi++)
+
+ for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++)
{
- from = (char *) &(fpregsetp -> f_fpregs[regi-FP0_REGNUM][0]);
+ 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 (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. */
+ (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 (fpregsetp, regno)
-fpregset_t *fpregsetp;
-int regno;
+fill_fpregset (fpregset_t *fpregsetp, int regno)
{
int regi;
char *to;
char *from;
- extern char registers[];
- for (regi = FP0_REGNUM ; regi < FPC_REGNUM ; regi++)
+ 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]);
+ 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)];
+ fpregsetp->f_pcr = *(int *) ®isters[REGISTER_BYTE (FPC_REGNUM)];
}
if ((regno == -1) || (regno == FPS_REGNUM))
{
- fpregsetp -> f_psr = *(int *) ®isters[REGISTER_BYTE (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)];
+ fpregsetp->f_fpiaddr = *(int *) ®isters[REGISTER_BYTE (FPI_REGNUM)];
}
}
-#endif /* defined (FP0_REGNUM) */
+#endif /* defined (FP0_REGNUM) */
-#endif /* USE_PROC_FS */
+#endif /* USE_PROC_FS */
-#ifdef GET_LONGJMP_TARGET
/* 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
-get_longjmp_target(pc)
- CORE_ADDR *pc;
+m68k_get_longjmp_target (CORE_ADDR *pc)
{
- char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
+#if defined (JB_PC) && defined (JB_ELEMENT_SIZE)
+ char *buf;
CORE_ADDR sp, jb_addr;
- sp = read_register(SP_REGNUM);
+ 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 */
+ if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */
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
}
-#endif /* GET_LONGJMP_TARGET */
/* 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
prior to doing the trap. */
CORE_ADDR
-m68k_saved_pc_after_call(frame)
- struct frame_info *frame;
+m68k_saved_pc_after_call (struct frame_info *frame)
{
-#ifdef GDB_TARGET_IS_SUN3
+#ifdef SYSCALL_TRAP
int op;
- op = read_memory_integer (frame->pc, 2);
- op &= 0xFFFF;
+ op = read_memory_integer (frame->pc - SYSCALL_TRAP_OFFSET, 2);
- if (op == P_TRAP)
+ if (op == SYSCALL_TRAP)
return read_memory_integer (read_register (SP_REGNUM) + 4, 4);
else
-#endif /* GDB_TARGET_IS_SUN3 */
+#endif /* SYSCALL_TRAP */
return read_memory_integer (read_register (SP_REGNUM), 4);
}
+
+
+void
+_initialize_m68k_tdep (void)
+{
+ tm_print_insn = print_insn_m68k;
+}
projects / deliverable / binutils-gdb.git / blobdiff