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* m68k-tdep.c (m68k_remote_breakpoint_from_pc): Add. Currently not

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used in architecture vector. The default is
m68k_local_breakpoint_from_pc.
(m68k_local_breakpoint_from_pc): Add.
(enum): Add register numbers from tm-m68k.h.
(m68k_gdbarch_init): Add breakpoint_from_pc to architecture vector.
* config/m68k/tm-m68k.h (GDB_MULTI_ARCH): Set to
GDB_MULTI_ARCH_PARTIAL.
(BPT_VECTOR, REGISTER_BYTES_FP, REGISTER_BYTES_NOFP)
(NUM_FREGS, SIG_PC_FP_OFFSET, SP_ARG0, REMOTE_BPT_VECTOR): Move to
m68k-tdep.c.
(BREAKPOINT, REMOTE_BREAKPOINT): Remove.
(A1_REGNUM, FP0_REGNUM, FPC_REGNUM, FPS_REGNUM, FPI_REGNUM): Move
to enum in m68k-tdep.c
This commit is contained in:
Grace Sainsbury
2002-07-02 18:13:54 +00:00
parent 7a5a05349e
commit 103a159751
3 changed files with 123 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

99
gdb/m68k-tdep.c
View File

@@ -42,17 +42,83 @@
#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_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 (numbytes)
{
@@ -92,7 +158,7 @@ m68k_register_virtual_size (int regnum)
static struct type *
m68k_register_virtual_type (int regnum)
{
if ((unsigned) regnum >= FPC_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;
@@ -138,8 +204,8 @@ m68k_stack_align (CORE_ADDR addr)
static int
m68k_register_byte (int regnum)
{
if (regnum >= FPC_REGNUM)
return (((regnum - FPC_REGNUM) * 4) + 168);
if (regnum >= E_FPC_REGNUM)
return (((regnum - E_FPC_REGNUM) * 4) + 168);
else if (regnum >= FP0_REGNUM)
return (((regnum - FP0_REGNUM) * 12) + 72);
else
@@ -152,7 +218,7 @@ m68k_register_byte (int regnum)
static void
m68k_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
{
write_register (A1_REGNUM, addr);
write_register (E_A1_REGNUM, addr);
}
/* Extract from an array regbuf containing the (raw) register state
@@ -795,14 +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
@@ -817,7 +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))
{
@@ -826,17 +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 *) &registers[REGISTER_BYTE (FPC_REGNUM)];
fpregsetp->f_pcr = *(int *) &registers[REGISTER_BYTE (E_FPC_REGNUM)];
}
if ((regno == -1) || (regno == FPS_REGNUM))
if ((regno == -1) || (regno == E_FPS_REGNUM))
{
fpregsetp->f_psr = *(int *) &registers[REGISTER_BYTE (FPS_REGNUM)];
fpregsetp->f_psr = *(int *) &registers[REGISTER_BYTE (E_FPS_REGNUM)];
}
if ((regno == -1) || (regno == FPI_REGNUM))
if ((regno == -1) || (regno == E_FPI_REGNUM))
{
fpregsetp->f_fpiaddr = *(int *) &registers[REGISTER_BYTE (FPI_REGNUM)];
fpregsetp->f_fpiaddr = *(int *) &registers[REGISTER_BYTE (E_FPI_REGNUM)];
}
}
@@ -936,6 +1002,7 @@ m68k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
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);