#include <sys/reg.h>
#endif
+/*
+ * Some systems (Linux) may have threads implemented as pseudo-processes,
+ * in which case we may be tracing more than one process at a time.
+ * In that case, inferior_pid will contain the main process ID and the
+ * individual thread (process) id mashed together. These macros are
+ * used to separate them out. The definitions may be overridden in tm.h
+ */
+
+#if !defined (PIDGET) /* Default definition for PIDGET/TIDGET. */
+#define PIDGET(PID) PID
+#define TIDGET(PID) 0
+#endif
+
/* This is a duplicate of the table in i386-xdep.c. */
static int regmap[] =
};
-/* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS)
- being less than or equal to the number of registers that can be stored
- in a gregset_t. Note that with the current scheme there will typically
- be more registers actually stored in a gregset_t that what we know
- about. This is bogus and should be fixed. */
+/* Which ptrace request retrieves which registers?
+ These apply to the corresponding SET requests as well. */
+#define GETREGS_SUPPLIES(regno) \
+ (0 <= (regno) && (regno) <= 15)
+#define GETFPREGS_SUPPLIES(regno) \
+ (FP0_REGNUM <= (regno) && (regno) <= LAST_FPU_CTRL_REGNUM)
+#define GETXFPREGS_SUPPLIES(regno) \
+ (FP0_REGNUM <= (regno) && (regno) <= MXCSR_REGNUM)
+
+/* Does the current host support the GETXFPREGS request? The header
+ file may or may not define it, and even if it is defined, the
+ kernel will return EIO if it's running on a pre-SSE processor.
+
+ PTRACE_GETXFPREGS is a Cygnus invention, since we wrote our own
+ Linux kernel patch for SSE support. That patch may or may not
+ actually make it into the official distribution. If you find that
+ years have gone by since this stuff was added, and Linux isn't
+ using PTRACE_GETXFPREGS, that means that our patch didn't make it,
+ and you can delete this, and the related code.
+
+ My instinct is to attach this to some architecture- or
+ target-specific data structure, but really, a particular GDB
+ process can only run on top of one kernel at a time. So it's okay
+ for this to be a simple variable. */
+int have_ptrace_getxfpregs =
+#ifdef HAVE_PTRACE_GETXFPREGS
+ 1
+#else
+ 0
+#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. */
+\f
+/* Transfering the general registers between GDB, inferiors and core files. */
+/* Given a pointer to a general register set in struct user format
+ (gregset_t *), unpack the register contents and supply them as
+ gdb's idea of the current register values. */
void
supply_gregset (gregsetp)
gregset_t *gregsetp;
register int regi;
register greg_t *regp = (greg_t *) gregsetp;
- for (regi = 0 ; regi < (NUM_REGS - NUM_FREGS) ; regi++)
+ for (regi = 0; regi < NUM_GREGS; regi++)
{
supply_register (regi, (char *) (regp + regmap[regi]));
}
}
+
+/* Fill in a gregset_t object with selected data from a gdb-format
+ register file.
+ - GREGSETP points to the gregset_t object to be filled.
+ - GDB_REGS points to the GDB-style register file providing the data.
+ - VALID is an array indicating which registers in GDB_REGS are
+ valid; the parts of *GREGSETP that would hold registers marked
+ invalid in GDB_REGS are left unchanged. If VALID is zero, all
+ registers are assumed to be valid. */
void
-fill_gregset (gregsetp, regno)
- gregset_t *gregsetp;
- int regno;
+convert_to_gregset (gregset_t *gregsetp,
+ char *gdb_regs,
+ signed char *valid)
{
int regi;
register greg_t *regp = (greg_t *) gregsetp;
- for (regi = 0 ; regi < (NUM_REGS - NUM_FREGS) ; regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- *(regp + regmap[regi]) = *(int *) ®isters[REGISTER_BYTE (regi)];
- }
- }
+ for (regi = 0; regi < NUM_GREGS; regi++)
+ if (! valid || valid[regi])
+ *(regp + regmap[regi]) = * (int *) ®isters[REGISTER_BYTE (regi)];
}
-/* Given a pointer to a floating point register set in (fpregset_t *)
- format, 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;
+/* Store GDB's value for REGNO in *GREGSETP. If REGNO is -1, do all
+ of them. */
+void
+fill_gregset (gregset_t *gregsetp,
+ int regno)
{
- register int regi;
- char *from;
- from = (char *) &(fpregsetp->st_space[0]);
- for (regi = FPSTART_REGNUM ; regi <= FPEND_REGNUM ; regi++)
+ if (regno == -1)
+ convert_to_gregset (gregsetp, registers, 0);
+ else if (regno >= 0 && regno < NUM_GREGS)
{
- supply_register(regi, from);
- from += REGISTER_RAW_SIZE(regi);
+ signed char valid[NUM_GREGS];
+ memset (valid, 0, sizeof (valid));
+ valid[regno] = 1;
+ convert_to_gregset (gregsetp, registers, valid);
}
}
-/* Given a pointer to a floating point register set in (fpregset_t *)
- format, update all of the registers from gdb's idea
- of the current floating point register set. */
-void
-fill_fpregset (fpregsetp, regno)
- fpregset_t *fpregsetp;
- int regno;
+/* Read the general registers from the process, and store them
+ in registers[]. */
+static void
+fetch_regs (int tid)
{
- int regi;
- char *to;
- char *from;
+ int ret, regno;
+ gregset_t buf;
- to = (char *) &(fpregsetp->st_space[0]);
- for (regi = FPSTART_REGNUM ; regi <= FPEND_REGNUM ; regi++)
+ ret = ptrace (PTRACE_GETREGS, tid, 0, (int) &buf);
+ if (ret < 0)
{
- from = (char *) ®isters[REGISTER_BYTE (regi)];
- memcpy (to, from, REGISTER_RAW_SIZE (regi));
- to += REGISTER_RAW_SIZE(regi);
+ warning ("Couldn't get registers");
+ return;
}
+
+ supply_gregset (&buf);
}
-/*
- Get the whole floating point state of the process and
- store the floating point stack into registers[].
- */
+
+/* Set the inferior's general registers to the values in registers[]
+ --- but only those registers marked as valid. */
static void
-fetch_fpregs(void)
+store_regs (int tid)
{
int ret, regno;
- char buf[FPREG_BYTES];
+ gregset_t buf;
- ret = ptrace (PTRACE_GETFPREGS, inferior_pid, 0, (int)buf);
- if ( ret < 0 )
+ ret = ptrace (PTRACE_GETREGS, tid, 0, (int) &buf);
+ if (ret < 0)
{
- warning ("Couldn't get floating point status");
+ warning ("Couldn't get registers");
return;
}
- for ( regno = 0; regno < NUM_FREGS; regno++ )
+ convert_to_gregset (&buf, registers, register_valid);
+
+ ret = ptrace (PTRACE_SETREGS, tid, 0, (int)buf);
+ if (ret < 0)
{
- if ( regno < 7 )
- supply_register (NUM_REGS-NUM_FREGS+regno, buf + regno*4);
- else
- supply_register (NUM_REGS-NUM_FREGS+regno,
- buf + FPENV_BYTES + (regno-7)*FPREG_RAW_SIZE);
+ warning ("Couldn't write registers");
+ return;
}
+}
+
+\f
+/* Transfering floating-point registers between GDB, inferiors and cores. */
+
+/* What is the address of st(N) within the fpregset_t structure F? */
+#define FPREGSET_T_FPREG_ADDR(f, n) \
+ ((char *) &(f)->st_space + (n) * 10)
+
+/* Fill GDB's register file with the floating-point register values in
+ *FPREGSETP. */
+void
+supply_fpregset (fpregset_t *fpregsetp)
+{
+ int i;
+
+ /* Supply the floating-point registers. */
+ for (i = 0; i < 8; i++)
+ supply_register (FP0_REGNUM + i, FPREGSET_T_FPREG_ADDR (fpregsetp, i));
+
+ supply_register (FCTRL_REGNUM, (char *) &fpregsetp->cwd);
+ supply_register (FSTAT_REGNUM, (char *) &fpregsetp->swd);
+ supply_register (FTAG_REGNUM, (char *) &fpregsetp->twd);
+ supply_register (FCOFF_REGNUM, (char *) &fpregsetp->fip);
+ supply_register (FDS_REGNUM, (char *) &fpregsetp->fos);
+ supply_register (FDOFF_REGNUM, (char *) &fpregsetp->foo);
+
+ /* Extract the code segment and opcode from the "fcs" member. */
+ {
+ long l;
+
+ l = fpregsetp->fcs & 0xffff;
+ supply_register (FCS_REGNUM, (char *) &l);
+
+ l = (fpregsetp->fcs >> 16) & ((1 << 11) - 1);
+ supply_register (FOP_REGNUM, (char *) &l);
+ }
}
-/*
- Get the whole floating point state of the process and
- replace the contents from registers[].
- */
+/* Fill in an fpregset_t structure with selected data from a
+ gdb-format register file.
+ - FPREGSETP points to the structure to be filled.
+ - GDB_REGS points to the GDB-style register file providing the data.
+ - VALID is an array indicating which registers in GDB_REGS are
+ valid; the parts of *FPREGSETP that would hold registers marked
+ invalid in GDB_REGS are left unchanged. If VALID is zero, all
+ registers are assumed to be valid. */
+void
+convert_to_fpregset (fpregset_t *fpregsetp,
+ char *gdb_regs,
+ signed char *valid)
+{
+ int i;
+
+ /* Fill in the floating-point registers. */
+ for (i = 0; i < 8; i++)
+ if (!valid || valid[i])
+ memcpy (FPREGSET_T_FPREG_ADDR (fpregsetp, i),
+ ®isters[REGISTER_BYTE (FP0_REGNUM + i)],
+ REGISTER_RAW_SIZE(FP0_REGNUM + i));
+
+#define fill(MEMBER, REGNO) \
+ if (! valid || valid[(REGNO)]) \
+ memcpy (&fpregsetp->MEMBER, ®isters[REGISTER_BYTE (REGNO)], \
+ sizeof (fpregsetp->MEMBER))
+
+ fill (cwd, FCTRL_REGNUM);
+ fill (swd, FSTAT_REGNUM);
+ fill (twd, FTAG_REGNUM);
+ fill (fip, FCOFF_REGNUM);
+ fill (foo, FDOFF_REGNUM);
+ fill (fos, FDS_REGNUM);
+
+#undef fill
+
+ if (! valid || valid[FCS_REGNUM])
+ fpregsetp->fcs
+ = ((fpregsetp->fcs & ~0xffff)
+ | (* (int *) ®isters[REGISTER_BYTE (FCS_REGNUM)] & 0xffff));
+
+ if (! valid || valid[FOP_REGNUM])
+ fpregsetp->fcs
+ = ((fpregsetp->fcs & 0xffff)
+ | ((*(int *) ®isters[REGISTER_BYTE (FOP_REGNUM)] & ((1 << 11) - 1))
+ << 16));
+}
+
+
+/* Given a pointer to a floating point register set in (fpregset_t *)
+ format, update all of the registers from gdb's idea of the current
+ floating point register set. */
+
+void
+fill_fpregset (fpregset_t *fpregsetp,
+ int regno)
+{
+ convert_to_fpregset (fpregsetp, registers, 0);
+}
+
+
+/* Get the whole floating point state of the process and store the
+ floating point stack into registers[]. */
static void
-store_fpregs(void)
+fetch_fpregs (int tid)
{
int ret, regno;
- char buf[FPREG_BYTES];
+ fpregset_t buf;
- ret = ptrace (PTRACE_GETFPREGS, inferior_pid, 0, (int)buf);
- if ( ret < 0 )
+ ret = ptrace (PTRACE_GETFPREGS, tid, 0, (int) &buf);
+ if (ret < 0)
{
warning ("Couldn't get floating point status");
return;
}
- for ( regno = 0; regno < NUM_FREGS; regno++ )
+ /* ptrace fills an fpregset_t, so we can use the same function we do
+ for core files. */
+ supply_fpregset (&buf);
+}
+
+
+/* Set the inferior's floating-point registers to the values in
+ registers[] --- but only those registers marked valid. */
+static void
+store_fpregs (int tid)
+{
+ int ret;
+ fpregset_t buf;
+
+ ret = ptrace (PTRACE_GETFPREGS, tid, 0, (int) &buf);
+ if (ret < 0)
{
- if ( register_valid[regno] )
- {
- if ( regno < 7 )
- {
- read_register_gen (NUM_REGS-NUM_FREGS+regno,
- buf + regno*4);
- }
- else
- {
- read_register_gen (NUM_REGS-NUM_FREGS+regno,
- buf + FPENV_BYTES + (regno-7)*FPREG_RAW_SIZE);
- }
- }
+ warning ("Couldn't get floating point status");
+ return;
}
- ret = ptrace (PTRACE_SETFPREGS, inferior_pid, 0, (int)buf);
- if ( ret < 0 )
+ convert_to_fpregset (&buf, registers, register_valid);
+
+ ret = ptrace (PTRACE_SETFPREGS, tid, 0, (int) &buf);
+ if (ret < 0)
{
warning ("Couldn't write floating point status");
return;
}
-
}
+\f
+/* Transfering floating-point and SSE registers to and from GDB. */
-/*
- Get state of all non-fp registers of the process and
- store into registers[].
- */
+
+/* PTRACE_GETXFPREGS is a Cygnus invention, since we wrote our own
+ Linux kernel patch for SSE support. That patch may or may not
+ actually make it into the official distribution. If you find that
+ years have gone by since this code was added, and Linux isn't using
+ PTRACE_GETXFPREGS, that means that our patch didn't make it, and
+ you can delete this code. */
+
+#ifdef HAVE_PTRACE_GETXFPREGS
static void
-fetch_regs(void)
+supply_xfpregset (struct user_xfpregs_struct *xfpregs)
{
- int ret, regno;
- char buf[17*sizeof(unsigned int)];
-
- ret = ptrace (PTRACE_GETREGS, inferior_pid, 0, (int)buf);
- if ( ret < 0 )
+ int reg;
+
+ /* Supply the floating-point registers. */
+ for (reg = 0; reg < 8; reg++)
+ supply_register (FP0_REGNUM + reg, (char *) &xfpregs->st_space[reg]);
+
+ {
+ supply_register (FCTRL_REGNUM, (char *) &xfpregs->cwd);
+ supply_register (FSTAT_REGNUM, (char *) &xfpregs->swd);
+ supply_register (FTAG_REGNUM, (char *) &xfpregs->twd);
+ supply_register (FCOFF_REGNUM, (char *) &xfpregs->fip);
+ supply_register (FDS_REGNUM, (char *) &xfpregs->fos);
+ supply_register (FDOFF_REGNUM, (char *) &xfpregs->foo);
+
+ /* Extract the code segment and opcode from the "fcs" member. */
{
- warning ("Couldn't get registers");
- return;
- }
+ long l;
+
+ l = xfpregs->fcs & 0xffff;
+ supply_register (FCS_REGNUM, (char *) &l);
- for ( regno = 0; regno < NUM_REGS-NUM_FREGS; regno++ )
- supply_register (regno, buf + register_addr (regno, U_REGS_OFFSET));
+ l = (xfpregs->fcs >> 16) & ((1 << 11) - 1);
+ supply_register (FOP_REGNUM, (char *) &l);
+ }
+ }
+ /* Supply the SSE registers. */
+ for (reg = 0; reg < 8; reg++)
+ supply_register (XMM0_REGNUM + reg, (char *) &xfpregs->xmm_space[reg]);
+ supply_register (MXCSR_REGNUM, (char *) &xfpregs->mxcsr);
}
-/*
- Get the whole non-floating-point register state of the process and
- replace them in the process from registers[].
- */
static void
-store_regs(void)
+convert_to_xfpregset (struct user_xfpregs_struct *xfpregs,
+ char *gdb_regs,
+ signed char *valid)
{
- int ret, regno;
- char buf[17*sizeof(unsigned int)];
+ int reg;
+
+ /* Fill in the floating-point registers. */
+ for (reg = 0; reg < 8; reg++)
+ if (!valid || valid[reg])
+ memcpy (&xfpregs->st_space[reg],
+ ®isters[REGISTER_BYTE (FP0_REGNUM + reg)],
+ REGISTER_RAW_SIZE(FP0_REGNUM + reg));
+
+#define fill(MEMBER, REGNO) \
+ if (! valid || valid[(REGNO)]) \
+ memcpy (&xfpregs->MEMBER, ®isters[REGISTER_BYTE (REGNO)], \
+ sizeof (xfpregs->MEMBER))
+
+ fill (cwd, FCTRL_REGNUM);
+ fill (swd, FSTAT_REGNUM);
+ fill (twd, FTAG_REGNUM);
+ fill (fip, FCOFF_REGNUM);
+ fill (foo, FDOFF_REGNUM);
+ fill (fos, FDS_REGNUM);
+
+#undef fill
+
+ if (! valid || valid[FCS_REGNUM])
+ xfpregs->fcs
+ = ((xfpregs->fcs & ~0xffff)
+ | (* (int *) ®isters[REGISTER_BYTE (FCS_REGNUM)] & 0xffff));
+
+ if (! valid || valid[FOP_REGNUM])
+ xfpregs->fcs
+ = ((xfpregs->fcs & 0xffff)
+ | ((*(int *) ®isters[REGISTER_BYTE (FOP_REGNUM)] & ((1 << 11) - 1))
+ << 16));
+
+ /* Fill in the XMM registers. */
+ for (reg = 0; reg < 8; reg++)
+ if (! valid || valid[reg])
+ memcpy (&xfpregs->xmm_space[reg],
+ ®isters[REGISTER_BYTE (XMM0_REGNUM + reg)],
+ REGISTER_RAW_SIZE (XMM0_REGNUM + reg));
+}
+
+
+/* Make a PTRACE_GETXFPREGS request, and supply all the register
+ values that yields to GDB. */
+static int
+fetch_xfpregs (int tid)
+{
+ int ret;
+ struct user_xfpregs_struct xfpregs;
+
+ if (! have_ptrace_getxfpregs)
+ return 0;
- ret = ptrace (PTRACE_GETREGS, inferior_pid, 0, (int)buf);
- if ( ret < 0 )
+ ret = ptrace (PTRACE_GETXFPREGS, tid, 0, &xfpregs);
+ if (ret == -1)
{
- warning ("Couldn't get registers");
- return;
+ if (errno == EIO)
+ {
+ have_ptrace_getxfpregs = 0;
+ return 0;
+ }
+
+ warning ("couldn't read floating-point and SSE registers.");
+ return 0;
}
- for ( regno = 0; regno < NUM_REGS-NUM_FREGS; regno++ )
+ supply_xfpregset (&xfpregs);
+ return 1;
+}
+
+
+/* Send all the valid register values in GDB's register file covered
+ by the PTRACE_SETXFPREGS request to the inferior. */
+static int
+store_xfpregs (int tid)
+{
+ int ret;
+ struct user_xfpregs_struct xfpregs;
+
+ if (! have_ptrace_getxfpregs)
+ return 0;
+
+ ret = ptrace (PTRACE_GETXFPREGS, tid, 0, &xfpregs);
+ if (ret == -1)
{
- if ( register_valid[regno] )
- read_register_gen (regno, buf + register_addr (regno, U_REGS_OFFSET));
+ if (errno == EIO)
+ {
+ have_ptrace_getxfpregs = 0;
+ return 0;
+ }
+
+ warning ("couldn't read floating-point and SSE registers.");
+ return 0;
}
- ret = ptrace (PTRACE_SETREGS, inferior_pid, 0, (int)buf);
+ convert_to_xfpregset (&xfpregs, registers, register_valid);
- if ( ret < 0 )
+ if (ptrace (PTRACE_SETXFPREGS, tid, 0, &xfpregs) < 0)
{
- warning ("Couldn't write floating point status");
- return;
+ warning ("Couldn't write floating-point and SSE registers.");
+ return 0;
}
+ return 1;
}
+/* Fill the XMM registers in the register file with dummy values. For
+ cases where we don't have access to the XMM registers. I think
+ this is cleaner than printing a warning. For a cleaner solution,
+ we should gdbarchify the i386 family. */
+static void
+dummy_sse_values ()
+{
+ /* C doesn't have a syntax for NaN's, so write it out as an array of
+ longs. */
+ static long dummy[4] = { 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff };
+ static long mxcsr = 0x1f80;
+ int reg;
+
+ for (reg = 0; reg < 8; reg++)
+ supply_register (XMM0_REGNUM + reg, (char *) dummy);
+ supply_register (MXCSR_REGNUM, (char *) &mxcsr);
+}
+
+#else
+
+/* Stub versions of the above routines, for systems that don't have
+ PTRACE_GETXFPREGS. */
+static int store_xfpregs (int tid) { return 0; }
+static int fetch_xfpregs (int tid) { return 0; }
+static void dummy_sse_values () {}
+
+#endif
+
+\f
+/* Transferring arbitrary registers between GDB and inferior. */
+
/* Fetch registers from the child process.
Fetch all if regno == -1, otherwise fetch all ordinary
registers or all floating point registers depending
upon the value of regno. */
void
-fetch_inferior_registers (regno)
- int regno;
+fetch_inferior_registers (int regno)
{
- if ( (regno < NUM_REGS - NUM_FREGS) || (regno == -1) )
- fetch_regs();
+ /* linux lwp id's are process id's */
+ int tid;
+
+ if ((tid = TIDGET (inferior_pid)) == 0)
+ tid = inferior_pid; /* not a threaded program */
- if ( (regno >= NUM_REGS - NUM_FREGS) || (regno == -1) )
- fetch_fpregs();
+ /* Use the xfpregs requests whenever possible, since they transfer
+ more registers in one system call, and we'll cache the results.
+ But remember that fetch_xfpregs can fail, and return zero. */
+ if (regno == -1)
+ {
+ fetch_regs (tid);
+ if (fetch_xfpregs (tid))
+ return;
+ fetch_fpregs (tid);
+ return;
+ }
+
+ if (GETREGS_SUPPLIES (regno))
+ {
+ fetch_regs (tid);
+ return;
+ }
+
+ if (GETXFPREGS_SUPPLIES (regno))
+ {
+ if (fetch_xfpregs (tid))
+ return;
+
+ /* Either our processor or our kernel doesn't support the SSE
+ registers, so read the FP registers in the traditional way,
+ and fill the SSE registers with dummy values. It would be
+ more graceful to handle differences in the register set using
+ gdbarch. Until then, this will at least make things work
+ plausibly. */
+ fetch_fpregs (tid);
+ dummy_sse_values ();
+ return;
+ }
+
+ internal_error ("i386-linux-nat.c (fetch_inferior_registers): "
+ "got request for bad register number %d", regno);
}
store_inferior_registers (regno)
int regno;
{
- if ( (regno < NUM_REGS - NUM_FREGS) || (regno == -1) )
- store_regs();
+ /* linux lwp id's are process id's */
+ int tid;
+
+ if ((tid = TIDGET (inferior_pid)) == 0)
+ tid = inferior_pid; /* not a threaded program */
- if ( (regno >= NUM_REGS - NUM_FREGS) || (regno == -1) )
- store_fpregs();
+ /* Use the xfpregs requests whenever possible, since they transfer
+ more registers in one system call. But remember that
+ store_xfpregs can fail, and return zero. */
+ if (regno == -1)
+ {
+ store_regs (tid);
+ if (store_xfpregs (tid))
+ return;
+ store_fpregs (tid);
+ return;
+ }
+
+ if (GETREGS_SUPPLIES (regno))
+ {
+ store_regs (tid);
+ return;
+ }
+
+ if (GETXFPREGS_SUPPLIES (regno))
+ {
+ if (store_xfpregs (tid))
+ return;
+
+ /* Either our processor or our kernel doesn't support the SSE
+ registers, so just write the FP registers in the traditional way. */
+ store_fpregs (tid);
+ return;
+ }
+
+ internal_error ("i386-linux-nat.c (store_inferior_registers): "
+ "got request to store bad register number %d", regno);
+}
+
+
+\f
+/* Interpreting register set info found in core files. */
+
+/* Provide registers to GDB from a core file.
+
+ (We can't use the generic version of this function in
+ core-regset.c, because Linux has *three* different kinds of
+ register set notes. core-regset.c would have to call
+ supply_xfpregset, which most platforms don't have.)
+
+ CORE_REG_SECT points to an array of bytes, which are the contents
+ of a `note' from a core file which BFD thinks might contain
+ register contents. CORE_REG_SIZE is its size.
+
+ WHICH says which register set corelow suspects this is:
+ 0 --- the general register set, in gregset format
+ 2 --- the floating-point register set, in fpregset format
+ 3 --- the extended floating-point register set, in struct
+ user_xfpregs_struct format
+
+ DUMMY isn't used on Linux. */
+static void
+i386_linux_fetch_core_registers (char *core_reg_sect,
+ unsigned core_reg_size,
+ int which,
+ CORE_ADDR dummy)
+{
+ gregset_t gregset;
+ fpregset_t fpregset;
+
+ switch (which)
+ {
+ case 0:
+ if (core_reg_size != sizeof (gregset))
+ warning ("wrong size gregset struct in core file");
+ else
+ {
+ memcpy (&gregset, core_reg_sect, sizeof (gregset));
+ supply_gregset (&gregset);
+ }
+ break;
+
+ case 2:
+ if (core_reg_size != sizeof (fpregset))
+ warning ("wrong size fpregset struct in core file");
+ else
+ {
+ memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
+ supply_fpregset (&fpregset);
+ }
+ break;
+
+#ifdef HAVE_PTRACE_GETXFPREGS
+ {
+ struct user_xfpregs_struct xfpregset;
+ case 3:
+ if (core_reg_size != sizeof (struct user_xfpregs_struct))
+ warning ("wrong size user_xfpregs_struct in core file");
+ else
+ {
+ memcpy (&xfpregset, core_reg_sect, sizeof (xfpregset));
+ supply_xfpregset (&xfpregset);
+ }
+ break;
+ }
+#endif
+
+ default:
+ /* We've covered all the kinds of registers we know about here,
+ so this must be something we wouldn't know what to do with
+ anyway. Just ignore it. */
+ break;
+ }
}
+static struct core_fns i386_linux_nat_core_fns =
+{
+ bfd_target_elf_flavour, /* core_flavour */
+ default_check_format, /* check_format */
+ default_core_sniffer, /* core_sniffer */
+ i386_linux_fetch_core_registers, /* core_read_registers */
+ NULL /* next */
+};
+
+\f
+/* Calling functions in shared libraries. */
+
/* Find the minimal symbol named NAME, and return both the minsym
struct and its objfile. This probably ought to be in minsym.c, but
everything there is trying to deal with things like C++ and
return 0;
}
+
+
+\f
+/* Module initialization. */
+
+void
+_initialize_i386_linux_nat ()
+{
+ add_core_fns (&i386_linux_nat_core_fns);
+}
projects / deliverable / binutils-gdb.git / blobdiff