* Makefile.in: Adjust dependencies of m68klinux-tdep.c.

[deliverable/binutils-gdb.git] / gdb / m68klinux-tdep.c

diff --git a/gdb/m68klinux-tdep.c b/gdb/m68klinux-tdep.c
index 0b84483fb5997c46cc59ec40ec7ac566737bc09a..574139625c29484b3aaeca5338106e66a56e16e6 100644 (file)
--- a/gdb/m68klinux-tdep.c
+++ b/gdb/m68klinux-tdep.c
@@ -1,6 +1,6 @@
 /* Motorola m68k target-dependent support for GNU/Linux.
 
-   Copyright 1996, 1998, 2000, 2001, 2002, 2003, 2004
+   Copyright (C) 1996, 1998, 2000, 2001, 2002, 2003, 2004, 2007
    Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -17,8 +17,8 @@
 
    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.  */
+   Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
 #include "defs.h"
 #include "gdbcore.h"
@@ -35,6 +35,11 @@
 #include "m68k-tdep.h"
 #include "trad-frame.h"
 #include "frame-unwind.h"
+#include "glibc-tdep.h"
+#include "solib-svr4.h"
+#include "auxv.h"
+#include "observer.h"
+#include "elf/common.h"
 \f
 /* Offsets (in target ints) into jmp_buf.  */
 
@@ -110,7 +115,7 @@ static int m68k_linux_sigcontext_reg_offset[M68K_NUM_REGS] =
   -1,                          /* %a5 */
   -1,                          /* %fp */
   1 * 4,                       /* %sp */
-  5 * 4 + 2,                   /* %sr */
+  6 * 4,                       /* %sr */
   6 * 4 + 2,                   /* %pc */
   8 * 4,                       /* %fp0 */
   11 * 4,                      /* %fp1 */
@@ -125,6 +130,39 @@ static int m68k_linux_sigcontext_reg_offset[M68K_NUM_REGS] =
   16 * 4                       /* %fpiaddr */
 };
 
+static int m68k_uclinux_sigcontext_reg_offset[M68K_NUM_REGS] =
+{
+  2 * 4,                       /* %d0 */
+  3 * 4,                       /* %d1 */
+  -1,                          /* %d2 */
+  -1,                          /* %d3 */
+  -1,                          /* %d4 */
+  -1,                          /* %d5 */
+  -1,                          /* %d6 */
+  -1,                          /* %d7 */
+  4 * 4,                       /* %a0 */
+  5 * 4,                       /* %a1 */
+  -1,                          /* %a2 */
+  -1,                          /* %a3 */
+  -1,                          /* %a4 */
+  6 * 4,                       /* %a5 */
+  -1,                          /* %fp */
+  1 * 4,                       /* %sp */
+  7 * 4,                       /* %sr */
+  7 * 4 + 2,                   /* %pc */
+  -1,                          /* %fp0 */
+  -1,                          /* %fp1 */
+  -1,                          /* %fp2 */
+  -1,                          /* %fp3 */
+  -1,                          /* %fp4 */
+  -1,                          /* %fp5 */
+  -1,                          /* %fp6 */
+  -1,                          /* %fp7 */
+  -1,                          /* %fpcr */
+  -1,                          /* %fpsr */
+  -1                           /* %fpiaddr */
+};
+
 /* From <asm/ucontext.h>.  */
 static int m68k_linux_ucontext_reg_offset[M68K_NUM_REGS] =
 {
@@ -171,6 +209,17 @@ struct m68k_linux_sigtramp_info
   int *sc_reg_offset;
 };
 
+/* Nonzero if running on uClinux.  */
+static int target_is_uclinux;
+
+static void
+m68k_linux_inferior_created (struct target_ops *objfile, int from_tty)
+{
+  /* Record that we will need to re-evaluate whether we are running on
+     a uClinux or normal Linux target (see m68k_linux_get_sigtramp_info).  */
+  target_is_uclinux = -1;
+}
+
 static struct m68k_linux_sigtramp_info
 m68k_linux_get_sigtramp_info (struct frame_info *next_frame)
 {
@@ -178,6 +227,18 @@ m68k_linux_get_sigtramp_info (struct frame_info *next_frame)
   char buf[4];
   struct m68k_linux_sigtramp_info info;
 
+  if (target_is_uclinux == -1)
+    {
+      /* Determine whether we are running on a uClinux or normal Linux
+         target so we can use the correct sigcontext layouts.  */
+    
+      CORE_ADDR dummy;
+    
+      target_is_uclinux
+        = target_auxv_search (&current_target, AT_NULL, &dummy) > 0
+          && target_auxv_search (&current_target, AT_PAGESZ, &dummy) == 0;
+    }
+
   frame_unwind_register (next_frame, M68K_SP_REGNUM, buf);
   sp = extract_unsigned_integer (buf, 4);
 
@@ -187,7 +248,9 @@ m68k_linux_get_sigtramp_info (struct frame_info *next_frame)
   if (m68k_linux_pc_in_sigtramp (frame_pc_unwind (next_frame), 0) == 2)
     info.sc_reg_offset = m68k_linux_ucontext_reg_offset;
   else
-    info.sc_reg_offset = m68k_linux_sigcontext_reg_offset;
+    info.sc_reg_offset
+      = target_is_uclinux ? m68k_uclinux_sigcontext_reg_offset
+                         : m68k_linux_sigcontext_reg_offset;
   return info;
 }
 
@@ -246,7 +309,7 @@ m68k_linux_sigtramp_frame_prev_register (struct frame_info *next_frame,
                                         int regnum, int *optimizedp,
                                         enum lval_type *lvalp,
                                         CORE_ADDR *addrp,
-                                        int *realnump, void *valuep)
+                                        int *realnump, gdb_byte *valuep)
 {
   /* Make sure we've initialized the cache.  */
   struct trad_frame_cache *cache =
@@ -284,7 +347,7 @@ m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   tdep->jb_elt_size = M68K_LINUX_JB_ELEMENT_SIZE;
 
   /* GNU/Linux uses a calling convention that's similar to SVR4.  It
-     returns integer values in %d0/%di, pointer values in %a0 and
+     returns integer values in %d0/%d1, pointer values in %a0 and
      floating values in %fp0, just like SVR4, but uses %a1 to pass the
      address to store a structure value.  It also returns small
      structures in registers instead of memory.  */
@@ -292,11 +355,24 @@ m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   tdep->struct_value_regnum = M68K_A1_REGNUM;
   tdep->struct_return = reg_struct_return;
 
+  set_gdbarch_decr_pc_after_break (gdbarch, 2);
+
   frame_unwind_append_sniffer (gdbarch, m68k_linux_sigtramp_frame_sniffer);
 
   /* Shared library handling.  */
-  set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section);
+
+  /* GNU/Linux uses SVR4-style shared libraries.  */
+  set_solib_svr4_fetch_link_map_offsets (gdbarch,
+                                        svr4_ilp32_fetch_link_map_offsets);
+
+  /* GNU/Linux uses the dynamic linker included in the GNU C Library.  */
+  set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
+
   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+
+  /* Enable TLS support.  */
+  set_gdbarch_fetch_tls_load_module_address (gdbarch,
+                                             svr4_fetch_objfile_link_map);
 }
 
 void
@@ -304,4 +380,5 @@ _initialize_m68k_linux_tdep (void)
 {
   gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_LINUX,
                          m68k_linux_init_abi);
+  observer_attach_inferior_created (m68k_linux_inferior_created);
 }