X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fm68klinux-nat.c;h=f0429f6386e2952b5b19fe0b70533b86de28365e;hb=3c853d931322f71b01a217f05bb8302f32a263d2;hp=10f4a191841af3c79bf314aa5c536c203d375f57;hpb=75738c297badd8ef64075f9aebcb5aaef9e03c24;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/m68klinux-nat.c b/gdb/m68klinux-nat.c
index 10f4a19184..f0429f6386 100644
--- a/gdb/m68klinux-nat.c
+++ b/gdb/m68klinux-nat.c
@@ -1,13 +1,13 @@
/* Motorola m68k native support for GNU/Linux.
- Copyright 1996, 1998, 2000, 2001, 2002 Free Software Foundation,
- Inc.
+ Copyright (C) 1996, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+ 2008, 2009, 2010 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -16,20 +16,19 @@
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. */
+ along with this program. If not, see . */
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "language.h"
#include "gdbcore.h"
+#include "gdb_string.h"
#include "regcache.h"
+#include "target.h"
+#include "linux-nat.h"
-#ifdef USG
-#include
-#endif
+#include "m68k-tdep.h"
#include
#include
@@ -50,9 +49,11 @@
#include "floatformat.h"
#include "target.h"
-
-/* This table must line up with REGISTER_NAMES in tm-m68k.h */
+/* Prototypes for supply_gregset etc. */
+#include "gregset.h"
+
+/* This table must line up with gdbarch_register_name in "m68k-tdep.c". */
static const int regmap[] =
{
PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
@@ -78,7 +79,7 @@ getregs_supplies (int regno)
int
getfpregs_supplies (int regno)
{
- return FP0_REGNUM <= regno && regno <= FPI_REGNUM;
+ return M68K_FP0_REGNUM <= regno && regno <= M68K_FPI_REGNUM;
}
/* Does the current host support the GETREGS request? */
@@ -92,96 +93,56 @@ int have_ptrace_getregs =
-/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
- is stored. */
-
-int
-m68k_linux_register_u_addr (int blockend, int regnum)
-{
- return (blockend + 4 * regmap[regnum]);
-}
-
-
/* Fetching registers directly from the U area, one at a time. */
-/* FIXME: This duplicates code from `inptrace.c'. The problem is that we
- define FETCH_INFERIOR_REGISTERS since we want to use our own versions
- of {fetch,store}_inferior_registers that use the GETREGS request. This
- means that the code in `infptrace.c' is #ifdef'd out. But we need to
- fall back on that code when GDB is running on top of a kernel that
- doesn't support the GETREGS request. */
-
-#ifndef PT_READ_U
-#define PT_READ_U PTRACE_PEEKUSR
-#endif
-#ifndef PT_WRITE_U
-#define PT_WRITE_U PTRACE_POKEUSR
-#endif
-
-/* Default the type of the ptrace transfer to int. */
-#ifndef PTRACE_XFER_TYPE
-#define PTRACE_XFER_TYPE int
-#endif
-
/* Fetch one register. */
static void
-fetch_register (int regno)
+fetch_register (struct regcache *regcache, int regno)
{
- /* This isn't really an address. But ptrace thinks of it as one. */
- CORE_ADDR regaddr;
- char mess[128]; /* For messages */
- register int i;
- unsigned int offset; /* Offset of registers within the u area. */
- char buf[MAX_REGISTER_RAW_SIZE];
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ long regaddr;
+ int i;
+ char buf[MAX_REGISTER_SIZE];
int tid;
- if (CANNOT_FETCH_REGISTER (regno))
- {
- memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
- supply_register (regno, buf);
- return;
- }
-
/* Overload thread id onto process id */
- if ((tid = TIDGET (inferior_ptid)) == 0)
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
- offset = U_REGS_OFFSET;
-
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
+ regaddr = 4 * regmap[regno];
+ for (i = 0; i < register_size (gdbarch, regno); i += sizeof (long))
{
errno = 0;
- *(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid,
- (PTRACE_ARG3_TYPE) regaddr, 0);
- regaddr += sizeof (PTRACE_XFER_TYPE);
+ *(long *) &buf[i] = ptrace (PTRACE_PEEKUSER, tid, regaddr, 0);
+ regaddr += sizeof (long);
if (errno != 0)
- {
- sprintf (mess, "reading register %s (#%d)",
- REGISTER_NAME (regno), regno);
- perror_with_name (mess);
- }
+ error (_("Couldn't read register %s (#%d): %s."),
+ gdbarch_register_name (gdbarch, regno),
+ regno, safe_strerror (errno));
}
- supply_register (regno, buf);
+ regcache_raw_supply (regcache, regno, buf);
}
/* Fetch register values from the inferior.
If REGNO is negative, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
-void
-old_fetch_inferior_registers (int regno)
+static void
+old_fetch_inferior_registers (struct regcache *regcache, int regno)
{
if (regno >= 0)
{
- fetch_register (regno);
+ fetch_register (regcache, regno);
}
else
{
- for (regno = 0; regno < NUM_REGS; regno++)
+ for (regno = 0;
+ regno < gdbarch_num_regs (get_regcache_arch (regcache));
+ regno++)
{
- fetch_register (regno);
+ fetch_register (regcache, regno);
}
}
}
@@ -189,45 +150,34 @@ old_fetch_inferior_registers (int regno)
/* Store one register. */
static void
-store_register (int regno)
+store_register (const struct regcache *regcache, int regno)
{
- /* This isn't really an address. But ptrace thinks of it as one. */
- CORE_ADDR regaddr;
- char mess[128]; /* For messages */
- register int i;
- unsigned int offset; /* Offset of registers within the u area. */
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ long regaddr;
+ int i;
int tid;
- char *buf = alloca (MAX_REGISTER_RAW_SIZE);
-
- if (CANNOT_STORE_REGISTER (regno))
- {
- return;
- }
+ char buf[MAX_REGISTER_SIZE];
/* Overload thread id onto process id */
- if ((tid = TIDGET (inferior_ptid)) == 0)
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
- offset = U_REGS_OFFSET;
-
- regaddr = register_addr (regno, offset);
+ regaddr = 4 * regmap[regno];
/* Put the contents of regno into a local buffer */
- regcache_collect (regno, buf);
+ regcache_raw_collect (regcache, regno, buf);
/* Store the local buffer into the inferior a chunk at the time. */
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
+ for (i = 0; i < register_size (gdbarch, regno); i += sizeof (long))
{
errno = 0;
- ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr,
- *(PTRACE_XFER_TYPE *) (buf + i));
- regaddr += sizeof (PTRACE_XFER_TYPE);
+ ptrace (PTRACE_POKEUSER, tid, regaddr, *(long *) &buf[i]);
+ regaddr += sizeof (long);
if (errno != 0)
- {
- sprintf (mess, "writing register %s (#%d)",
- REGISTER_NAME (regno), regno);
- perror_with_name (mess);
- }
+ error (_("Couldn't write register %s (#%d): %s."),
+ gdbarch_register_name (gdbarch, regno),
+ regno, safe_strerror (errno));
}
}
@@ -235,18 +185,20 @@ store_register (int regno)
If REGNO is negative, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
-void
-old_store_inferior_registers (int regno)
+static void
+old_store_inferior_registers (const struct regcache *regcache, int regno)
{
if (regno >= 0)
{
- store_register (regno);
+ store_register (regcache, regno);
}
else
{
- for (regno = 0; regno < NUM_REGS; regno++)
+ for (regno = 0;
+ regno < gdbarch_num_regs (get_regcache_arch (regcache));
+ regno++)
{
- store_register (regno);
+ store_register (regcache, regno);
}
}
}
@@ -255,44 +207,36 @@ old_store_inferior_registers (int regno)
(elf_gregset_t *), unpack the register contents and supply
them as gdb's idea of the current register values. */
-
-/* Note both m68k-tdep.c and m68klinux-nat.c contain definitions
- for supply_gregset and supply_fpregset. The definitions
- in m68k-tdep.c are valid if USE_PROC_FS is defined. Otherwise,
- the definitions in m68klinux-nat.c will be used. This is a
- bit of a hack. The supply_* routines do not belong in
- *_tdep.c files. But, there are several lynx ports that currently
- depend on these definitions. */
-
-#ifndef USE_PROC_FS
-
-/* Prototypes for supply_gregset etc. */
-#include "gregset.h"
-
void
-supply_gregset (elf_gregset_t *gregsetp)
+supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp)
{
- elf_greg_t *regp = (elf_greg_t *) gregsetp;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ const elf_greg_t *regp = (const elf_greg_t *) gregsetp;
int regi;
- for (regi = D0_REGNUM; regi <= SP_REGNUM; regi++)
- supply_register (regi, (char *) ®p[regmap[regi]]);
- supply_register (PS_REGNUM, (char *) ®p[PT_SR]);
- supply_register (PC_REGNUM, (char *) ®p[PT_PC]);
+ for (regi = M68K_D0_REGNUM;
+ regi <= gdbarch_sp_regnum (gdbarch);
+ regi++)
+ regcache_raw_supply (regcache, regi, ®p[regmap[regi]]);
+ regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch),
+ ®p[PT_SR]);
+ regcache_raw_supply (regcache,
+ gdbarch_pc_regnum (gdbarch), ®p[PT_PC]);
}
/* Fill register REGNO (if it is a general-purpose register) in
*GREGSETPS with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
-fill_gregset (elf_gregset_t *gregsetp, int regno)
+fill_gregset (const struct regcache *regcache,
+ elf_gregset_t *gregsetp, int regno)
{
elf_greg_t *regp = (elf_greg_t *) gregsetp;
int i;
for (i = 0; i < NUM_GREGS; i++)
- if ((regno == -1 || regno == i))
- regcache_collect (i, regp + regmap[i]);
+ if (regno == -1 || regno == i)
+ regcache_raw_collect (regcache, i, regp + regmap[i]);
}
#ifdef HAVE_PTRACE_GETREGS
@@ -301,7 +245,7 @@ fill_gregset (elf_gregset_t *gregsetp, int regno)
store their values in GDB's register array. */
static void
-fetch_regs (int tid)
+fetch_regs (struct regcache *regcache, int tid)
{
elf_gregset_t regs;
@@ -315,33 +259,33 @@ fetch_regs (int tid)
return;
}
- perror_with_name ("Couldn't get registers");
+ perror_with_name (_("Couldn't get registers"));
}
- supply_gregset (®s);
+ supply_gregset (regcache, (const elf_gregset_t *) ®s);
}
/* Store all valid general-purpose registers in GDB's register array
into the process/thread specified by TID. */
static void
-store_regs (int tid, int regno)
+store_regs (const struct regcache *regcache, int tid, int regno)
{
elf_gregset_t regs;
if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0)
- perror_with_name ("Couldn't get registers");
+ perror_with_name (_("Couldn't get registers"));
- fill_gregset (®s, regno);
+ fill_gregset (regcache, ®s, regno);
if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0)
- perror_with_name ("Couldn't write registers");
+ perror_with_name (_("Couldn't write registers"));
}
#else
-static void fetch_regs (int tid) {}
-static void store_regs (int tid, int regno) {}
+static void fetch_regs (struct regcache *regcache, int tid) {}
+static void store_regs (const struct regcache *regcache, int tid, int regno) {}
#endif
@@ -349,21 +293,25 @@ static void store_regs (int tid, int regno) {}
/* Transfering floating-point registers between GDB, inferiors and cores. */
/* What is the address of fpN within the floating-point register set F? */
-#define FPREG_ADDR(f, n) ((char *) &(f)->fpregs[(n) * 3])
+#define FPREG_ADDR(f, n) (&(f)->fpregs[(n) * 3])
/* Fill GDB's register array with the floating-point register values in
*FPREGSETP. */
void
-supply_fpregset (elf_fpregset_t *fpregsetp)
+supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp)
{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
int regi;
- for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++)
- supply_register (regi, FPREG_ADDR (fpregsetp, regi - FP0_REGNUM));
- supply_register (FPC_REGNUM, (char *) &fpregsetp->fpcntl[0]);
- supply_register (FPS_REGNUM, (char *) &fpregsetp->fpcntl[1]);
- supply_register (FPI_REGNUM, (char *) &fpregsetp->fpcntl[2]);
+ for (regi = gdbarch_fp0_regnum (gdbarch);
+ regi < gdbarch_fp0_regnum (gdbarch) + 8; regi++)
+ regcache_raw_supply (regcache, regi,
+ FPREG_ADDR (fpregsetp,
+ regi - gdbarch_fp0_regnum (gdbarch)));
+ regcache_raw_supply (regcache, M68K_FPC_REGNUM, &fpregsetp->fpcntl[0]);
+ regcache_raw_supply (regcache, M68K_FPS_REGNUM, &fpregsetp->fpcntl[1]);
+ regcache_raw_supply (regcache, M68K_FPI_REGNUM, &fpregsetp->fpcntl[2]);
}
/* Fill register REGNO (if it is a floating-point register) in
@@ -371,19 +319,25 @@ supply_fpregset (elf_fpregset_t *fpregsetp)
do this for all registers. */
void
-fill_fpregset (elf_fpregset_t *fpregsetp, int regno)
+fill_fpregset (const struct regcache *regcache,
+ elf_fpregset_t *fpregsetp, int regno)
{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
int i;
/* Fill in the floating-point registers. */
- for (i = FP0_REGNUM; i < FP0_REGNUM + 8; i++)
+ for (i = gdbarch_fp0_regnum (gdbarch);
+ i < gdbarch_fp0_regnum (gdbarch) + 8; i++)
if (regno == -1 || regno == i)
- regcache_collect (regno, FPREG_ADDR (fpregsetp, regno - FP0_REGNUM));
+ regcache_raw_collect (regcache, i,
+ FPREG_ADDR (fpregsetp,
+ i - gdbarch_fp0_regnum (gdbarch)));
/* Fill in the floating-point control registers. */
- for (i = FPC_REGNUM; i <= FPI_REGNUM; i++)
+ for (i = M68K_FPC_REGNUM; i <= M68K_FPI_REGNUM; i++)
if (regno == -1 || regno == i)
- regcache_collect (regno, fpregsetp->fpcntl[regno - FPC_REGNUM]);
+ regcache_raw_collect (regcache, i,
+ &fpregsetp->fpcntl[i - M68K_FPC_REGNUM]);
}
#ifdef HAVE_PTRACE_GETREGS
@@ -392,39 +346,37 @@ fill_fpregset (elf_fpregset_t *fpregsetp, int regno)
thier values in GDB's register array. */
static void
-fetch_fpregs (int tid)
+fetch_fpregs (struct regcache *regcache, int tid)
{
elf_fpregset_t fpregs;
if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
- perror_with_name ("Couldn't get floating point status");
+ perror_with_name (_("Couldn't get floating point status"));
- supply_fpregset (&fpregs);
+ supply_fpregset (regcache, (const elf_fpregset_t *) &fpregs);
}
/* Store all valid floating-point registers in GDB's register array
into the process/thread specified by TID. */
static void
-store_fpregs (int tid, int regno)
+store_fpregs (const struct regcache *regcache, int tid, int regno)
{
elf_fpregset_t fpregs;
if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
- perror_with_name ("Couldn't get floating point status");
+ perror_with_name (_("Couldn't get floating point status"));
- fill_fpregset (&fpregs, regno);
+ fill_fpregset (regcache, &fpregs, regno);
if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0)
- perror_with_name ("Couldn't write floating point status");
+ perror_with_name (_("Couldn't write floating point status"));
}
#else
-static void fetch_fpregs (int tid) {}
-static void store_fpregs (int tid, int regno) {}
-
-#endif
+static void fetch_fpregs (struct regcache *regcache, int tid) {}
+static void store_fpregs (const struct regcache *regcache, int tid, int regno) {}
#endif
@@ -434,8 +386,9 @@ static void store_fpregs (int tid, int regno) {}
this for all registers (including the floating point and SSE
registers). */
-void
-fetch_inferior_registers (int regno)
+static void
+m68k_linux_fetch_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
{
int tid;
@@ -443,12 +396,13 @@ fetch_inferior_registers (int regno)
GETREGS request isn't available. */
if (! have_ptrace_getregs)
{
- old_fetch_inferior_registers (regno);
+ old_fetch_inferior_registers (regcache, regno);
return;
}
/* GNU/Linux LWP ID's are process ID's. */
- if ((tid = TIDGET (inferior_ptid)) == 0)
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
/* Use the PTRACE_GETFPXREGS request whenever possible, since it
@@ -457,40 +411,41 @@ fetch_inferior_registers (int regno)
zero. */
if (regno == -1)
{
- fetch_regs (tid);
+ fetch_regs (regcache, tid);
/* The call above might reset `have_ptrace_getregs'. */
if (! have_ptrace_getregs)
{
- old_fetch_inferior_registers (-1);
+ old_fetch_inferior_registers (regcache, -1);
return;
}
- fetch_fpregs (tid);
+ fetch_fpregs (regcache, tid);
return;
}
if (getregs_supplies (regno))
{
- fetch_regs (tid);
+ fetch_regs (regcache, tid);
return;
}
if (getfpregs_supplies (regno))
{
- fetch_fpregs (tid);
+ fetch_fpregs (regcache, tid);
return;
}
internal_error (__FILE__, __LINE__,
- "Got request for bad register number %d.", regno);
+ _("Got request for bad register number %d."), regno);
}
/* Store register REGNO back into the child process. If REGNO is -1,
do this for all registers (including the floating point and SSE
registers). */
-void
-store_inferior_registers (int regno)
+static void
+m68k_linux_store_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
{
int tid;
@@ -498,12 +453,13 @@ store_inferior_registers (int regno)
SETREGS request isn't available. */
if (! have_ptrace_getregs)
{
- old_store_inferior_registers (regno);
+ old_store_inferior_registers (regcache, regno);
return;
}
/* GNU/Linux LWP ID's are process ID's. */
- if ((tid = TIDGET (inferior_ptid)) == 0)
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
/* Use the PTRACE_SETFPREGS requests whenever possible, since it
@@ -511,25 +467,25 @@ store_inferior_registers (int regno)
store_fpregs can fail, and return zero. */
if (regno == -1)
{
- store_regs (tid, regno);
- store_fpregs (tid, regno);
+ store_regs (regcache, tid, regno);
+ store_fpregs (regcache, tid, regno);
return;
}
if (getregs_supplies (regno))
{
- store_regs (tid, regno);
+ store_regs (regcache, tid, regno);
return;
}
if (getfpregs_supplies (regno))
{
- store_fpregs (tid, regno);
+ store_fpregs (regcache, tid, regno);
return;
}
internal_error (__FILE__, __LINE__,
- "Got request to store bad register number %d.", regno);
+ _("Got request to store bad register number %d."), regno);
}
/* Interpreting register set info found in core files. */
@@ -551,7 +507,8 @@ store_inferior_registers (int regno)
REG_ADDR isn't used on GNU/Linux. */
static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
+fetch_core_registers (struct regcache *regcache,
+ char *core_reg_sect, unsigned core_reg_size,
int which, CORE_ADDR reg_addr)
{
elf_gregset_t gregset;
@@ -561,21 +518,21 @@ fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
{
case 0:
if (core_reg_size != sizeof (gregset))
- warning ("Wrong size gregset in core file.");
+ warning (_("Wrong size gregset in core file."));
else
{
memcpy (&gregset, core_reg_sect, sizeof (gregset));
- supply_gregset (&gregset);
+ supply_gregset (regcache, (const elf_gregset_t *) &gregset);
}
break;
case 2:
if (core_reg_size != sizeof (fpregset))
- warning ("Wrong size fpregset in core file.");
+ warning (_("Wrong size fpregset in core file."));
else
{
memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
- supply_fpregset (&fpregset);
+ supply_fpregset (regcache, (const elf_fpregset_t *) &fpregset);
}
break;
@@ -588,109 +545,6 @@ fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
}
-int
-kernel_u_size (void)
-{
- return (sizeof (struct user));
-}
-
-/* Check whether insn1 and insn2 are parts of a signal trampoline. */
-
-#define IS_SIGTRAMP(insn1, insn2) \
- (/* addaw #20,sp; moveq #119,d0; trap #0 */ \
- (insn1 == 0xdefc0014 && insn2 == 0x70774e40) \
- /* moveq #119,d0; trap #0 */ \
- || insn1 == 0x70774e40)
-
-#define IS_RT_SIGTRAMP(insn1, insn2) \
- (/* movel #173,d0; trap #0 */ \
- (insn1 == 0x203c0000 && insn2 == 0x00ad4e40) \
- /* moveq #82,d0; notb d0; trap #0 */ \
- || (insn1 == 0x70524600 && (insn2 >> 16) == 0x4e40))
-
-/* Return non-zero if PC points into the signal trampoline. For the sake
- of m68k_linux_frame_saved_pc we also distinguish between non-RT and RT
- signal trampolines. */
-
-int
-m68k_linux_in_sigtramp (CORE_ADDR pc)
-{
- CORE_ADDR sp;
- char buf[12];
- unsigned long insn0, insn1, insn2;
-
- if (read_memory_nobpt (pc - 4, buf, sizeof (buf)))
- return 0;
- insn1 = extract_unsigned_integer (buf + 4, 4);
- insn2 = extract_unsigned_integer (buf + 8, 4);
- if (IS_SIGTRAMP (insn1, insn2))
- return 1;
- if (IS_RT_SIGTRAMP (insn1, insn2))
- return 2;
-
- insn0 = extract_unsigned_integer (buf, 4);
- if (IS_SIGTRAMP (insn0, insn1))
- return 1;
- if (IS_RT_SIGTRAMP (insn0, insn1))
- return 2;
-
- insn0 = (insn0 << 16) | (insn1 >> 16);
- insn1 = (insn1 << 16) | (insn2 >> 16);
- if (IS_SIGTRAMP (insn0, insn1))
- return 1;
- if (IS_RT_SIGTRAMP (insn0, insn1))
- return 2;
-
- return 0;
-}
-
-/* Offset to saved PC in sigcontext, from . */
-#define SIGCONTEXT_PC_OFFSET 26
-
-/* Offset to saved PC in ucontext, from . */
-#define UCONTEXT_PC_OFFSET 88
-
-/* Get saved user PC for sigtramp from sigcontext or ucontext. */
-
-static CORE_ADDR
-m68k_linux_sigtramp_saved_pc (struct frame_info *frame)
-{
- CORE_ADDR sigcontext_addr;
- char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
- int ptrbytes = TARGET_PTR_BIT / TARGET_CHAR_BIT;
- int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
-
- /* Get sigcontext address, it is the third parameter on the stack. */
- if (frame->next)
- sigcontext_addr = read_memory_integer (FRAME_ARGS_ADDRESS (frame->next)
- + FRAME_ARGS_SKIP
- + sigcontext_offs,
- ptrbytes);
- else
- sigcontext_addr = read_memory_integer (read_register (SP_REGNUM)
- + sigcontext_offs,
- ptrbytes);
-
- /* Don't cause a memory_error when accessing sigcontext in case the
- stack layout has changed or the stack is corrupt. */
- if (m68k_linux_in_sigtramp (frame->pc) == 2)
- target_read_memory (sigcontext_addr + UCONTEXT_PC_OFFSET, buf, ptrbytes);
- else
- target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
- return extract_unsigned_integer (buf, ptrbytes);
-}
-
-/* Return the saved program counter for FRAME. */
-
-CORE_ADDR
-m68k_linux_frame_saved_pc (struct frame_info *frame)
-{
- if (frame->signal_handler_caller)
- return m68k_linux_sigtramp_saved_pc (frame);
-
- return read_memory_integer (frame->frame + 4, 4);
-}
-
/* Register that we are able to handle GNU/Linux ELF core file
formats. */
@@ -703,8 +557,22 @@ static struct core_fns linux_elf_core_fns =
NULL /* next */
};
+void _initialize_m68k_linux_nat (void);
+
void
-_initialize_m68k_linux_nat ()
+_initialize_m68k_linux_nat (void)
{
- add_core_fns (&linux_elf_core_fns);
+ struct target_ops *t;
+
+ /* Fill in the generic GNU/Linux methods. */
+ t = linux_target ();
+
+ /* Add our register access methods. */
+ t->to_fetch_registers = m68k_linux_fetch_inferior_registers;
+ t->to_store_registers = m68k_linux_store_inferior_registers;
+
+ /* Register the target. */
+ linux_nat_add_target (t);
+
+ deprecated_add_core_fns (&linux_elf_core_fns);
}