/* Target dependent code for the Motorola 68000 series.
- Copyright (C) 1990, 1992, 1993, 1994, 1995, 1996, 1999, 2000
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001,
+ 2002, 2003
Free Software Foundation, Inc.
This file is part of GDB.
#include "value.h"
#include "gdb_string.h"
#include "inferior.h"
+#include "regcache.h"
+#include "arch-utils.h"
+
+#include "m68k-tdep.h"
\f
#define P_LINKL_FP 0x480e
#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 (pc)
- CORE_ADDR pc;
+#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)
{
- 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;
+ static unsigned char break_insn[] = {0x4e, (0x40 | REMOTE_BPT_VECTOR)};
+ *lenptr = sizeof (break_insn);
+ return break_insn;
}
-/* The only reason this is here is the tm-isi.h reference below. It
+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, SR, FPCONTROL and
+ FPSTATUS, long double for FP0-FP7, and void pointer for all others
+ (A0-A7, PC, FPIADDR). 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 (regnum >= FP0_REGNUM && regnum <= FP0_REGNUM + 7)
+ return builtin_type_m68881_ext;
+
+ if (regnum == M68K_FPI_REGNUM || regnum == PC_REGNUM)
+ return builtin_type_void_func_ptr;
+
+ if (regnum == M68K_FPC_REGNUM || regnum == M68K_FPS_REGNUM
+ || regnum == PS_REGNUM)
+ return builtin_type_int32;
+
+ if (regnum >= M68K_A0_REGNUM && regnum <= M68K_A0_REGNUM + 7)
+ return builtin_type_void_data_ptr;
+
+ return builtin_type_int32;
+}
+
+/* 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 >= M68K_FPC_REGNUM)
+ return (((regnum - M68K_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 (M68K_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)
+{
+ deprecated_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 (get_frame_type (thisframe) == SIGTRAMP_FRAME)
+ return get_frame_base (thisframe);
+ else if (!inside_entry_file (get_frame_pc (thisframe)))
+ return read_memory_unsigned_integer (get_frame_base (thisframe), 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 (get_frame_type (fi) == SIGTRAMP_FRAME)
+ return 0;
+ else
+ return frameless_look_for_prologue (fi);
+}
+
+static CORE_ADDR
+m68k_frame_saved_pc (struct frame_info *frame)
+{
+ if (get_frame_type (frame) == SIGTRAMP_FRAME)
+ {
+ if (get_next_frame (frame))
+ return read_memory_unsigned_integer (get_frame_base (get_next_frame (frame))
+ + SIG_PC_FP_OFFSET, 4);
+ else
+ return read_memory_unsigned_integer (read_register (SP_REGNUM)
+ + SIG_PC_FP_OFFSET - 8, 4);
+ }
+ else
+ return read_memory_unsigned_integer (get_frame_base (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? */
extern CORE_ADDR
-isi_skip_prologue (pc)
- CORE_ADDR pc;
+altos_skip_prologue (CORE_ADDR pc)
{
- register int op = read_memory_integer (pc, 2);
+ register int op = read_memory_unsigned_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 */
+ /* From tm-altos.h */
else if (op == 0060000)
pc += 4; /* Skip bra #word */
else if (op == 00600377)
}
int
-delta68_in_sigtramp (pc, name)
- CORE_ADDR pc;
- char *name;
+delta68_in_sigtramp (CORE_ADDR pc, char *name)
{
if (name != NULL)
return strcmp (name, "_sigcode") == 0;
}
CORE_ADDR
-delta68_frame_args_address (frame_info)
- struct frame_info * frame_info;
+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;
+ if (get_frame_type (frame_info) == SIGTRAMP_FRAME)
+ return get_frame_base (frame_info) + 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 (get_next_frame (frame_info) && (get_frame_type (get_next_frame (frame_info)) == SIGTRAMP_FRAME))
+ return get_frame_base (get_next_frame (frame_info)) + 16;
+ else
+ return get_frame_base (frame_info) + 4;
}
else
- return frame_info->frame;
+ return get_frame_base (frame_info);
}
CORE_ADDR
-delta68_frame_saved_pc (frame_info)
- struct frame_info * frame_info;
+delta68_frame_saved_pc (struct frame_info *frame_info)
{
- return read_memory_integer (delta68_frame_args_address (frame_info) + 4, 4);
+ return read_memory_unsigned_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 (fi)
- struct frame_info *fi;
+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);
+ int insn = read_memory_unsigned_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);
}
int
-delta68_frame_num_args (fi)
- struct frame_info *fi;
+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);
+ int insn = read_memory_unsigned_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);
}
int
-news_frame_num_args (fi)
- struct frame_info *fi;
+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);
+ int insn = read_memory_unsigned_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);
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
-m68k_push_dummy_frame ()
+m68k_push_dummy_frame (void)
{
register CORE_ADDR sp = read_register (SP_REGNUM);
register int regnum;
this target or not. */
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--)
{
- read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12);
+ deprecated_read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12);
sp = push_bytes (sp, raw_buffer, 12);
}
restoring all saved registers. */
void
-m68k_pop_frame ()
+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);
+ fp = get_frame_base (frame);
+ m68k_frame_init_saved_regs (frame);
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--)
{
- if (fsr.regs[regnum])
+ if (get_frame_saved_regs (frame)[regnum])
{
- read_memory (fsr.regs[regnum], raw_buffer, 12);
- write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12);
+ read_memory (get_frame_saved_regs (frame)[regnum], raw_buffer, 12);
+ deprecated_write_register_bytes (REGISTER_BYTE (regnum), raw_buffer,
+ 12);
}
}
for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--)
{
- if (fsr.regs[regnum])
+ if (get_frame_saved_regs (frame)[regnum])
{
- write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
+ write_register (regnum,
+ read_memory_integer (get_frame_saved_regs (frame)[regnum], 4));
}
}
- if (fsr.regs[PS_REGNUM])
+ if (get_frame_saved_regs (frame)[PS_REGNUM])
{
- write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4));
+ write_register (PS_REGNUM,
+ read_memory_integer (get_frame_saved_regs (frame)[PS_REGNUM], 4));
}
write_register (FP_REGNUM, read_memory_integer (fp, 4));
write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));
*/
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;
+ op = read_memory_unsigned_integer (ip, 2);
if (op == P_LINKW_FP)
ip += 4; /* Skip link.w */
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 (frame_info, 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;
/* 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;
+ get_frame_base (frame_info) - 28 - 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)
+
+ if (get_frame_saved_regs (frame_info))
+ return;
+
+ frame_saved_regs_zalloc (frame_info);
+
+ memset (get_frame_saved_regs (frame_info), 0, SIZEOF_FRAME_SAVED_REGS);
+
+ if (get_frame_pc (frame_info) >= possible_call_dummy_start
+ && get_frame_pc (frame_info) <= get_frame_base (frame_info))
{
/* It is a call dummy. We could just stop now, since we know
to parse the "prologue" which is part of the call dummy.
This is needlessly complex and confusing. FIXME. */
- next_addr = (frame_info)->frame;
+ next_addr = get_frame_base (frame_info);
pc = possible_call_dummy_start;
}
else
{
- pc = get_pc_function_start ((frame_info)->pc);
+ pc = get_pc_function_start (get_frame_pc (frame_info));
- nextinsn = read_memory_integer (pc, 2);
+ nextinsn = read_memory_unsigned_integer (pc, 2);
if (P_PEA_FP == nextinsn
- && P_MOVL_SP_FP == read_memory_integer (pc + 2, 2))
+ && P_MOVL_SP_FP == read_memory_unsigned_integer (pc + 2, 2))
{
/* pea %fp
move.l %sp, %fp */
- next_addr = frame_info->frame;
+ next_addr = get_frame_base (frame_info);
pc += 4;
}
else if (P_LINKL_FP == nextinsn)
/* 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);
+ next_addr = get_frame_base (frame_info) + read_memory_integer (pc + 2, 4);
pc += 6;
}
else if (P_LINKW_FP == nextinsn)
/* 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);
+ next_addr = get_frame_base (frame_info) + 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)
+ if (read_memory_unsigned_integer (pc, 2) == 0157774)
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);
+ nextinsn = read_memory_unsigned_integer (pc, 2);
+ regmask = read_memory_unsigned_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);
+ get_frame_saved_regs (frame_info)[regnum] = (next_addr -= 12);
pc += 4;
}
/* fmovemx to (fp + displacement) */
{
register CORE_ADDR addr;
- addr = (frame_info)->frame + read_memory_integer (pc + 4, 2);
+ addr = get_frame_base (frame_info) + 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;
+ get_frame_saved_regs (frame_info)[regnum] = addr;
addr += 12;
}
pc += 6;
for (regnum = 0; regnum < 16; regnum++, regmask >>= 1)
if (regmask & 1)
{
- saved_regs->regs[regnum] = next_addr;
+ get_frame_saved_regs (frame_info)[regnum] = next_addr;
next_addr += 4;
}
pc += 4;
{
register CORE_ADDR addr;
- addr = (frame_info)->frame + read_memory_integer (pc + 4, 2);
+ addr = get_frame_base (frame_info) + 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;
+ get_frame_saved_regs (frame_info)[regnum] = addr;
addr += 4;
}
pc += 6;
/* 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);
+ get_frame_saved_regs (frame_info)[regnum] = (next_addr -= 4);
pc += 4;
}
/* movl r,-(sp) */
else if (0x2f00 == (0xfff0 & nextinsn))
{
regnum = 0xf & nextinsn;
- saved_regs->regs[regnum] = (next_addr -= 4);
+ get_frame_saved_regs (frame_info)[regnum] = (next_addr -= 4);
pc += 2;
}
/* fmovemx to index of sp */
for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1)
if (regmask & 1)
{
- saved_regs->regs[regnum] = next_addr;
+ get_frame_saved_regs (frame_info)[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);
+ get_frame_saved_regs (frame_info)[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;
+ get_frame_saved_regs (frame_info)[SP_REGNUM] = get_frame_base (frame_info) + 8;
+ get_frame_saved_regs (frame_info)[FP_REGNUM] = get_frame_base (frame_info);
+ get_frame_saved_regs (frame_info)[PC_REGNUM] = get_frame_base (frame_info) + 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;
+ if ((get_frame_type (frame_info) == SIGTRAMP_FRAME) && frame_info->next)
+ frame_info->saved_regs[SP_REGNUM] =
+ frame_info->next->frame + SIG_SP_FP_OFFSET;
#endif
}
register values. */
void
-supply_gregset (gregsetp)
- gregset_t *gregsetp;
+supply_gregset (gregset_t *gregsetp)
{
register int regi;
register greg_t *regp = (greg_t *) gregsetp;
}
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;
{
if ((regno == -1) || (regno == regi))
{
- *(regp + regi) = *(int *) ®isters[REGISTER_BYTE (regi)];
+ *(regp + regi) = *(int *) &deprecated_registers[REGISTER_BYTE (regi)];
}
}
if ((regno == -1) || (regno == PS_REGNUM))
{
- *(regp + R_PS) = *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)];
+ *(regp + R_PS) = *(int *) &deprecated_registers[REGISTER_BYTE (PS_REGNUM)];
}
if ((regno == -1) || (regno == PC_REGNUM))
{
- *(regp + R_PC) = *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
+ *(regp + R_PC) = *(int *) &deprecated_registers[REGISTER_BYTE (PC_REGNUM)];
}
}
idea of the current floating point register values. */
void
-supply_fpregset (fpregsetp)
- fpregset_t *fpregsetp;
+supply_fpregset (fpregset_t *fpregsetp)
{
register int regi;
char *from;
- for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++)
+ for (regi = FP0_REGNUM; regi < M68K_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 (M68K_FPC_REGNUM, (char *) &(fpregsetp->f_pcr));
+ supply_register (M68K_FPS_REGNUM, (char *) &(fpregsetp->f_psr));
+ supply_register (M68K_FPI_REGNUM, (char *) &(fpregsetp->f_fpiaddr));
}
/* Given a pointer to a floating point register set in /proc format
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;
- for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++)
+ for (regi = FP0_REGNUM; regi < M68K_FPC_REGNUM; regi++)
{
if ((regno == -1) || (regno == regi))
{
- from = (char *) ®isters[REGISTER_BYTE (regi)];
+ from = (char *) &deprecated_registers[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))
+ if ((regno == -1) || (regno == M68K_FPC_REGNUM))
{
- fpregsetp->f_pcr = *(int *) ®isters[REGISTER_BYTE (FPC_REGNUM)];
+ fpregsetp->f_pcr = *(int *) &deprecated_registers[REGISTER_BYTE (M68K_FPC_REGNUM)];
}
- if ((regno == -1) || (regno == FPS_REGNUM))
+ if ((regno == -1) || (regno == M68K_FPS_REGNUM))
{
- fpregsetp->f_psr = *(int *) ®isters[REGISTER_BYTE (FPS_REGNUM)];
+ fpregsetp->f_psr = *(int *) &deprecated_registers[REGISTER_BYTE (M68K_FPS_REGNUM)];
}
- if ((regno == -1) || (regno == FPI_REGNUM))
+ if ((regno == -1) || (regno == M68K_FPI_REGNUM))
{
- fpregsetp->f_fpiaddr = *(int *) ®isters[REGISTER_BYTE (FPI_REGNUM)];
+ fpregsetp->f_fpiaddr = *(int *) &deprecated_registers[REGISTER_BYTE (M68K_FPI_REGNUM)];
}
}
#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;
+ 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);
*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 SYSCALL_TRAP
int op;
- op = read_memory_integer (frame->pc - SYSCALL_TRAP_OFFSET, 2);
+ op = read_memory_unsigned_integer (frame->pc - SYSCALL_TRAP_OFFSET, 2);
if (op == SYSCALL_TRAP)
- return read_memory_integer (read_register (SP_REGNUM) + 4, 4);
+ return read_memory_unsigned_integer (read_register (SP_REGNUM) + 4, 4);
else
#endif /* SYSCALL_TRAP */
- return read_memory_integer (read_register (SP_REGNUM), 4);
+ return read_memory_unsigned_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);
+
+ /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
+ ready to unwind the PC first (see frame.c:get_prev_frame()). */
+ set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
+
+ 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_saved_pc (gdbarch, m68k_frame_saved_pc);
+ set_gdbarch_deprecated_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_register_raw_size (gdbarch, m68k_register_raw_size);
+ set_gdbarch_register_virtual_size (gdbarch, m68k_register_virtual_size);
+ set_gdbarch_deprecated_max_register_raw_size (gdbarch, 12);
+ set_gdbarch_deprecated_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, M68K_SP_REGNUM);
+ set_gdbarch_fp_regnum (gdbarch, M68K_FP_REGNUM);
+ set_gdbarch_pc_regnum (gdbarch, M68K_PC_REGNUM);
+ set_gdbarch_ps_regnum (gdbarch, M68K_PS_REGNUM);
+ set_gdbarch_fp0_regnum (gdbarch, M68K_FP0_REGNUM);
+
+ set_gdbarch_deprecated_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_deprecated_pc_in_call_dummy (gdbarch, deprecated_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_deprecated_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 ()
+_initialize_m68k_tdep (void)
{
+ gdbarch_register (bfd_arch_m68k, m68k_gdbarch_init, m68k_dump_tdep);
tm_print_insn = print_insn_m68k;
}
projects / deliverable / binutils-gdb.git / blobdiff