* config/i386/nm-linux.h (PREPARE_TO_PROCEED, ATTCH_LWP,

GET_THREAD_SIGNALS): New defines.
* config/i386/linux.mh (NATDEPFILES): Remove lin-thread.o and
linux-threads.o.  Add proc-service.o, thread-db.o and lin-lwp.o.
* proc-service.c: New file.
* thread-db.c: New file.
* lin-lwp.c: New file.

1 files changed, 333 insertions, 0 deletions

diff --git a/gdb/proc-service.c b/gdb/proc-service.c
new file mode 100644
index 00000000000..b69207e6b54
--- /dev/null
+++ b/gdb/proc-service.c
@@ -0,0 +1,333 @@
+/* <proc_service.h> implementation.
+   Copyright 1999, 2000 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
+   (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.
+
+   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 "gdb_proc_service.h"
+#include <sys/procfs.h>
+
+#include "inferior.h"
+#include "symtab.h"
+#include "target.h"
+
+/* Prototypes for supply_gregset etc.  */
+#include "gregset.h"
+
+
+/* Fix-up some broken systems.  */
+
+/* The prototypes in <proc_service.h> are slightly different on older
+   systems.  Compensate for the discrepancies.  */
+
+#ifdef PROC_SERVICE_IS_OLD
+typedef const struct ps_prochandle *gdb_ps_prochandle_t;
+typedef char *gdb_ps_read_buf_t;
+typedef char *gdb_ps_write_buf_t;
+typedef int gdb_ps_size_t;
+#else
+typedef struct ps_prochandle *gdb_ps_prochandle_t;
+typedef void *gdb_ps_read_buf_t;
+typedef const void *gdb_ps_write_buf_t;
+typedef size_t gdb_ps_size_t;
+#endif
+
+
+/* Building process ids.  */
+
+#ifndef MERGEPID
+#define MERGEPID(PID, TID)	(((PID) & 0xffff) | ((TID) << 16))
+#endif
+
+#define BUILD_LWP(tid, pid)	MERGEPID (pid, tid)
+
+
+/* Helper functions.  */
+
+static void
+restore_inferior_pid (void *arg)
+{
+  int *saved_pid_ptr = arg;
+  inferior_pid = *saved_pid_ptr;
+  free (arg);
+}
+
+static struct cleanup *
+save_inferior_pid (void)
+{
+  int *saved_pid_ptr;
+
+  saved_pid_ptr = xmalloc (sizeof (int));
+  *saved_pid_ptr = inferior_pid;
+  return make_cleanup (restore_inferior_pid, saved_pid_ptr);
+}
+
+/* Transfer LEN bytes of memory between BUF and address ADDR in the
+   process specified by PH.  If WRITE, transfer them to the process,
+   else transfer them from the process.  Returns PS_OK for success,
+   PS_ERR on failure.
+
+   This is a helper function for ps_pdread, ps_pdwrite, ps_ptread and
+   ps_ptwrite.  */
+
+static ps_err_e
+ps_xfer_memory (const struct ps_prochandle *ph, paddr_t addr,
+		char *buf, size_t len, int write)
+{
+  struct cleanup *old_chain = save_inferior_pid ();
+  int ret;
+
+  inferior_pid = ph->pid;
+
+  if (write)
+    ret = target_write_memory (addr, buf, len);
+  else
+    ret = target_read_memory (addr, buf, len);
+
+  do_cleanups (old_chain);
+
+  return (ret == 0 ? PS_OK : PS_ERR);
+}
+
+
+/* Stop the target process PH.  */
+
+ps_err_e
+ps_pstop (gdb_ps_prochandle_t ph)
+{
+  /* The process is always stopped when under control of GDB.  */
+  return PS_OK;
+}
+
+/* Resume the target process PH.  */
+
+ps_err_e
+ps_pcontinue (gdb_ps_prochandle_t ph)
+{
+  /* Pretend we did successfully continue the process.  GDB will take
+     care of it later on.  */
+  return PS_OK;
+}
+
+/* Stop the lightweight process LWPID within the target process PH.  */
+
+ps_err_e
+ps_lstop (gdb_ps_prochandle_t ph, lwpid_t lwpid)
+{
+  /* All lightweight processes are stopped when under control of GDB.  */
+  return PS_OK;
+}
+
+/* Resume the lightweight process (LWP) LWPID within the target
+   process PH.  */
+
+ps_err_e
+ps_lcontinue (gdb_ps_prochandle_t ph, lwpid_t lwpid)
+{
+  /* Pretend we did successfully continue LWPID.  GDB will take care
+     of it later on.  */
+  return PS_OK;
+}
+
+/* Get the size of the architecture-dependent extra state registers
+   for LWP LWPID within the target process PH and return it in
+   *XREGSIZE.  */
+
+ps_err_e
+ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
+{
+  /* FIXME: Not supported yet.  */
+  return PS_OK;
+}
+
+/* Get the extra state registers of LWP LWPID within the target
+   process PH and store them in XREGSET.  */
+
+ps_err_e
+ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
+{
+  /* FIXME: Not supported yet.  */
+  return PS_OK;
+}
+
+/* Set the extra state registers of LWP LWPID within the target
+   process PH from XREGSET.  */
+
+ps_err_e
+ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
+{
+  /* FIXME: Not supported yet.  */
+  return PS_OK;
+}
+
+/* Log (additional) diognostic information.  */
+
+void
+ps_plog (const char *fmt, ...)
+{
+  va_list args;
+
+  va_start (args, fmt);
+  vfprintf_filtered (gdb_stderr, fmt, args);
+}
+
+/* Search for the symbol named NAME within the object named OBJ within
+   the target process PH.  If the symbol is found the address of the
+   symbol is stored in SYM_ADDR.  */
+
+ps_err_e
+ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
+		   const char *name, paddr_t *sym_addr)
+{
+  struct minimal_symbol *ms;
+
+  /* FIXME: kettenis/2000-09-03: What should we do with OBJ?  */
+  ms = lookup_minimal_symbol (name, NULL, NULL);
+  if (ms == NULL)
+    return PS_NOSYM;
+
+  *sym_addr = SYMBOL_VALUE_ADDRESS (ms);
+  return PS_OK;
+}
+
+/* Read SIZE bytes from the target process PH at address ADDR and copy
+   them into BUF.  */
+
+ps_err_e
+ps_pdread (gdb_ps_prochandle_t ph, paddr_t addr,
+	   gdb_ps_read_buf_t buf, gdb_ps_size_t size)
+{
+  return ps_xfer_memory (ph, addr, buf, size, 0);
+}
+
+/* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
+
+ps_err_e
+ps_pdwrite (gdb_ps_prochandle_t ph, paddr_t addr,
+	    gdb_ps_write_buf_t buf, gdb_ps_size_t size)
+{
+  return ps_xfer_memory (ph, addr, (char *) buf, size, 1);
+}
+
+/* Read SIZE bytes from the target process PH at address ADDR and copy
+   them into BUF.  */
+
+ps_err_e
+ps_ptread (gdb_ps_prochandle_t ph, paddr_t addr,
+	   gdb_ps_read_buf_t buf, gdb_ps_size_t size)
+{
+  return ps_xfer_memory (ph, addr, buf, size, 0);
+}
+
+/* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
+
+ps_err_e
+ps_ptwrite (gdb_ps_prochandle_t ph, paddr_t addr,
+	    gdb_ps_write_buf_t buf, gdb_ps_size_t size)
+{
+  return ps_xfer_memory (ph, addr, (char *) buf, size, 1);
+}
+
+/* Get the general registers of LWP LWPID within the target process PH
+   and store them in GREGSET.  */
+
+ps_err_e
+ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
+{
+  struct cleanup *old_chain = save_inferior_pid ();
+
+  inferior_pid = BUILD_LWP (lwpid, ph->pid);
+
+  target_fetch_registers (-1);
+  fill_gregset ((gdb_gregset_t *) gregset, -1);
+
+  do_cleanups (old_chain);
+  return PS_OK;
+}
+
+/* Set the general registers of LWP LWPID within the target process PH
+   from GREGSET.  */
+
+ps_err_e
+ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
+{
+  struct cleanup *old_chain = save_inferior_pid ();
+
+  inferior_pid = BUILD_LWP (lwpid, ph->pid);
+
+  /* FIXME: We should really make supply_gregset const-correct.  */
+  supply_gregset ((gdb_gregset_t *) gregset);
+  target_store_registers (-1);
+
+  do_cleanups (old_chain);
+  return PS_OK;
+}
+
+/* Get the floating-point registers of LWP LWPID within the target
+   process PH and store them in FPREGSET.  */
+
+ps_err_e
+ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
+	       gdb_prfpregset_t *fpregset)
+{
+  struct cleanup *old_chain = save_inferior_pid ();
+
+  inferior_pid = BUILD_LWP (lwpid, ph->pid);
+
+  target_fetch_registers (-1);
+  fill_fpregset ((gdb_fpregset_t *) fpregset, -1);
+
+  do_cleanups (old_chain);
+  return PS_OK;
+}
+
+/* Set the floating-point registers of LWP LWPID within the target
+   process PH from FPREGSET.  */
+
+ps_err_e
+ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
+	       const gdb_prfpregset_t *fpregset)
+{
+  struct cleanup *old_chain = save_inferior_pid ();
+
+  inferior_pid = BUILD_LWP (lwpid, ph->pid);
+
+  /* FIXME: We should really make supply_fpregset const-correct.  */
+  supply_fpregset ((gdb_fpregset_t *) fpregset);
+  target_store_registers (-1);
+
+  do_cleanups (old_chain);
+  return PS_OK;
+}
+
+/* Return overall process id of the target PH.
+   Special for Linux -- not used on Solaris.  */
+
+pid_t
+ps_getpid (gdb_ps_prochandle_t ph)
+{
+  return ph->pid;
+}
+
+void
+_initialize_proc_service (void)
+{
+  /* This function solely exists to make sure this module is linked
+     into the final binary.  */
+}