Enable XML target descriptions for x86.

[deliverable/binutils-gdb.git] / gdb / i386-nto-tdep.c

diff --git a/gdb/i386-nto-tdep.c b/gdb/i386-nto-tdep.c
index cbe12e3ec2781e751c719a87c6473594c9b7c7f8..09c55e2dba1c30c538a8242573261b85558975a0 100644 (file)
--- a/gdb/i386-nto-tdep.c
+++ b/gdb/i386-nto-tdep.c
@@ -1,6 +1,7 @@
 /* Target-dependent code for QNX Neutrino x86.
 
-   Copyright (C) 2003, 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
+   Free Software Foundation, Inc.
 
    Contributed by QNX Software Systems Ltd.
 
@@ -121,7 +122,7 @@ i386nto_regset_id (int regno)
     return NTO_REG_END;
   else if (regno < I386_NUM_GREGS)
     return NTO_REG_GENERAL;
-  else if (regno < I386_NUM_GREGS + I386_NUM_FREGS)
+  else if (regno < I386_NUM_GREGS + I387_NUM_REGS)
     return NTO_REG_FLOAT;
   else if (regno < I386_SSE_NUM_REGS)
     return NTO_REG_FLOAT; /* We store xmm registers in fxsave_area.  */
@@ -287,21 +288,23 @@ i386nto_sigtramp_p (struct frame_info *this_frame)
   return name && strcmp ("__signalstub", name) == 0;
 }
 
-#define I386_NTO_SIGCONTEXT_OFFSET 136
-
 /* Assuming THIS_FRAME is a QNX Neutrino sigtramp routine, return the
    address of the associated sigcontext structure.  */
 
 static CORE_ADDR
 i386nto_sigcontext_addr (struct frame_info *this_frame)
 {
+  struct gdbarch *gdbarch = get_frame_arch (this_frame);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   char buf[4];
-  CORE_ADDR sp;
+  CORE_ADDR ptrctx;
 
-  get_frame_register (this_frame, I386_ESP_REGNUM, buf);
-  sp = extract_unsigned_integer (buf, 4);
+  /* We store __ucontext_t addr in EDI register.  */
+  get_frame_register (this_frame, I386_EDI_REGNUM, buf);
+  ptrctx = extract_unsigned_integer (buf, 4, byte_order);
+  ptrctx += 24 /* Context pointer is at this offset.  */;
 
-  return sp + I386_NTO_SIGCONTEXT_OFFSET;
+  return ptrctx;
 }
 
 static void
@@ -340,8 +343,8 @@ i386nto_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 
   tdep->sigtramp_p = i386nto_sigtramp_p;
   tdep->sigcontext_addr = i386nto_sigcontext_addr;
-  tdep->sc_pc_offset = 56;
-  tdep->sc_sp_offset = 68;
+  tdep->sc_reg_offset = i386nto_gregset_reg_offset;
+  tdep->sc_num_regs = ARRAY_SIZE (i386nto_gregset_reg_offset);
 
   /* Setjmp()'s return PC saved in EDX (5).  */
   tdep->jb_pc_offset = 20;     /* 5x32 bit ints in.  */