* configure.ac: Define HAVE_LINUX_REGSETS even if PTRACE_GETREGS

[deliverable/binutils-gdb.git] / gdb / gdbserver / linux-i386-low.c

diff --git a/gdb/gdbserver/linux-i386-low.c b/gdb/gdbserver/linux-i386-low.c
index b79b601ae8f5b203dc6e6a2e612a64f5a8dc0a0f..4981fea57756bd79a476d79d5ec7e83abca0ac6a 100644 (file)
--- a/gdb/gdbserver/linux-i386-low.c
+++ b/gdb/gdbserver/linux-i386-low.c
@@ -1,5 +1,5 @@
 /* GNU/Linux/i386 specific low level interface, for the remote server for GDB.
-   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2004, 2005
    Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -23,10 +23,30 @@
 #include "linux-low.h"
 #include "i387-fp.h"
 
+/* Correct for all GNU/Linux targets (for quite some time).  */
+#define GDB_GREGSET_T elf_gregset_t
+#define GDB_FPREGSET_T elf_fpregset_t
+
+#ifndef HAVE_ELF_FPREGSET_T
+/* Make sure we have said types.  Not all platforms bring in <linux/elf.h>
+   via <sys/procfs.h>.  */
+#ifdef HAVE_LINUX_ELF_H   
+#include <linux/elf.h>    
+#endif
+#endif
+   
+#include "../gdb_proc_service.h"
+
+#include <sys/ptrace.h>
+
 #ifdef HAVE_SYS_REG_H
 #include <sys/reg.h>
 #endif
 
+#ifndef PTRACE_GET_THREAD_AREA
+#define PTRACE_GET_THREAD_AREA 25
+#endif
+
 /* This module only supports access to the general purpose registers.  */
 
 #define i386_num_regs 16
@@ -43,6 +63,22 @@ static int i386_regmap[] =
   DS * 4, ES * 4, FS * 4, GS * 4
 };
 
+/* Called by libthread_db.  */
+
+ps_err_e
+ps_get_thread_area (const struct ps_prochandle *ph, 
+                   lwpid_t lwpid, int idx, void **base)
+{
+  unsigned int desc[4];
+
+  if (ptrace (PTRACE_GET_THREAD_AREA, lwpid,
+             (void *) idx, (unsigned long) &desc) < 0)
+    return PS_ERR;
+
+  *(int *)base = desc[1];
+  return PS_OK;
+}
+
 static int
 i386_cannot_store_register (int regno)
 {
@@ -56,7 +92,7 @@ i386_cannot_fetch_register (int regno)
 }
 
 
-#ifdef HAVE_LINUX_REGSETS
+#ifdef HAVE_PTRACE_GETREGS
 #include <sys/procfs.h>
 #include <sys/ptrace.h>
 
@@ -106,25 +142,26 @@ i386_store_fpxregset (const void *buf)
   i387_fxsave_to_cache (buf);
 }
 
+#endif /* HAVE_PTRACE_GETREGS */
 
 struct regset_info target_regsets[] = {
+#ifdef HAVE_PTRACE_GETREGS
   { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
     GENERAL_REGS,
     i386_fill_gregset, i386_store_gregset },
-#ifdef HAVE_PTRACE_GETFPXREGS
+# ifdef HAVE_PTRACE_GETFPXREGS
   { PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, sizeof (elf_fpxregset_t),
     EXTENDED_REGS,
     i386_fill_fpxregset, i386_store_fpxregset },
-#endif
+# endif
   { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
     FP_REGS,
     i386_fill_fpregset, i386_store_fpregset },
+#endif /* HAVE_PTRACE_GETREGS */
   { 0, 0, -1, -1, NULL, NULL }
 };
 
-#endif /* HAVE_LINUX_REGSETS */
-
-static const char i386_breakpoint[] = { 0xCC };
+static const unsigned char i386_breakpoint[] = { 0xCC };
 #define i386_breakpoint_len 1
 
 extern int debug_threads;