2003-07-15 Michal Ludvig <mludvig@suse.cz>

	* x86-64-linux-nat.c (regmap): Removed.
	(supply_gregset, fill_gregset): Call
	x86_64_linux_(fill,supply)_gregset functions.
	* x86-64-linux-tdep.c (USER_*): New defines.
	(user_to_gdb_regmap, x86_64_core_fns): New structure.
	(x86_64_linux_supply_gregset, x86_64_linux_fill_gregset):
	New functions.
	(fetch_core_registers): Ditto.
	(_initialize_x86_64_linux_tdep): Call add_core_fns().
	* x86-64-linux-tdep.h: New file.
	* config/i386/x86-64linux.mh (NATDEPFILES): Remove corelow.o
	and core-regset.o.
	* config/i386/x86-64linux.mt (TDEPFILES): Add corelow.o.

1 files changed, 112 insertions, 0 deletions

diff --git a/gdb/x86-64-linux-tdep.c b/gdb/x86-64-linux-tdep.c
index 8532685..7aab1d4 100644
--- a/gdb/x86-64-linux-tdep.c
+++ b/gdb/x86-64-linux-tdep.c
@@ -30,6 +30,116 @@
 #include "gdb_string.h"
 
 #include "x86-64-tdep.h"
+#include "x86-64-linux-tdep.h"
+
+/* Register indexes to 'struct user' come from <sys/reg.h>.  */
+
+#define USER_R15    0
+#define USER_R14    1
+#define USER_R13    2
+#define USER_R12    3
+#define USER_RBP    4
+#define USER_RBX    5
+#define USER_R11    6
+#define USER_R10    7
+#define USER_R9     8
+#define USER_R8     9
+#define USER_RAX    10
+#define USER_RCX    11
+#define USER_RDX    12
+#define USER_RSI    13
+#define USER_RDI    14
+#define USER_RIP    16
+#define USER_CS     17
+#define USER_EFLAGS 18
+#define USER_RSP    19
+#define USER_SS     20
+#define USER_DS     23
+#define USER_ES     24
+#define USER_FS     25
+#define USER_GS     26
+
+/* Mapping between the general-purpose registers in `struct user'
+   format and GDB's register array layout.  */
+
+static int user_to_gdb_regmap[] =
+{
+  USER_RAX, USER_RBX, USER_RCX, USER_RDX,
+  USER_RSI, USER_RDI, USER_RBP, USER_RSP,
+  USER_R8, USER_R9, USER_R10, USER_R11,
+  USER_R12, USER_R13, USER_R14, USER_R15,
+  USER_RIP, USER_EFLAGS, USER_CS, USER_SS,
+  USER_DS, USER_ES, USER_FS, USER_GS
+};
+
+/* Fill GDB's register array with the general-purpose register values
+   in *GREGSETP.  */
+
+void
+x86_64_linux_supply_gregset (char *regp)
+{
+  int i;
+
+  for (i = 0; i < X86_64_NUM_GREGS; i++)
+    supply_register (i, regp + (user_to_gdb_regmap[i] * 8));
+}
+
+/* Fill register REGNO (if it is a general-purpose register) in
+   *GREGSETPS with the value in GDB's register array.  If REGNO is -1,
+   do this for all registers.  */
+
+void
+x86_64_linux_fill_gregset (char *regp, int regno)
+{
+  int i;
+
+  for (i = 0; i < X86_64_NUM_GREGS; i++)
+    if (regno == -1 || regno == i)
+      regcache_collect (i, regp + (user_to_gdb_regmap[i] * 8));
+}
+
+/* The register sets used in GNU/Linux ELF core-dumps are identical to
+   the register sets used by `ptrace'.  The corresponding types are
+   `elf_gregset_t' for the general-purpose registers (with
+   `elf_greg_t' the type of a single GP register) and `elf_fpregset_t'
+   for the floating-point registers.  */
+
+static void
+fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
+			 int which, CORE_ADDR ignore)
+{
+  switch (which)
+    {
+    case 0:  /* Integer registers.  */
+      if (core_reg_size != 216)
+	warning ("Wrong size register set in core file.");
+      else
+	x86_64_linux_supply_gregset (core_reg_sect);
+      break;
+
+    case 2:  /* Floating point registers.  */
+    case 3:  /* "Extended" floating point registers.  This is gdb-speak
+		for SSE/SSE2. */
+      if (core_reg_size != 512)
+	warning ("Wrong size XMM register set in core file.");
+      else
+	x86_64_supply_fxsave (core_reg_sect);
+      break;
+
+    default:
+      /* Don't know what kind of register request this is; just ignore it.  */
+      break;
+    }
+}
+
+static struct core_fns x86_64_core_fns = 
+{
+  bfd_target_elf_flavour,		/* core_flavour */
+  default_check_format,			/* check_format */
+  default_core_sniffer,			/* core_sniffer */
+  fetch_core_registers,			/* core_read_registers */
+  NULL					/* next */
+};
 
 #define LINUX_SIGTRAMP_INSN0	0x48	/* mov $NNNNNNNN, %rax */
 #define LINUX_SIGTRAMP_OFFSET0	0
@@ -175,6 +285,8 @@ extern void _initialize_x86_64_linux_tdep (void);
 void
 _initialize_x86_64_linux_tdep (void)
 {
+  add_core_fns (&x86_64_core_fns);
+
   gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, GDB_OSABI_LINUX,
 			  x86_64_linux_init_abi);
 }