2002-04-20 Daniel Jacobowitz <drow@mvista.com>

[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 cb7b55f0f6cdaa1884c1256bdfa3dda56b5b6fa2..71264321341de0bdb2ebdb6399339fdf05529105 100644 (file)
--- a/gdb/gdbserver/linux-i386-low.c
+++ b/gdb/gdbserver/linux-i386-low.c
@@ -20,25 +20,22 @@
    Boston, MA 02111-1307, USA.  */
 
 #include "server.h"
+#include "linux-low.h"
+#include "i387-fp.h"
 
 #ifdef HAVE_SYS_REG_H
 #include <sys/reg.h>
 #endif
 
-/* This module only supports access to the general purpose registers.
-   Adjust the relevant constants accordingly.
+/* This module only supports access to the general purpose registers.  */
 
-   FIXME: kettenis/2001-03-28: We should really use PTRACE_GETREGS to
-   get at the registers.  Better yet, we should try to share code with
-   i386-linux-nat.c.  */
-
-int num_regs = 16;
+#define i386_num_regs 16
 
 /* This stuff comes from i386-linux-nat.c.  */
 
 /* Mapping between the general-purpose registers in `struct user'
    format and GDB's register array layout.  */
-int regmap[] = 
+static int i386_regmap[] = 
 {
   EAX * 4, ECX * 4, EDX * 4, EBX * 4,
   UESP * 4, EBP * 4, ESI * 4, EDI * 4,
@@ -46,14 +43,115 @@ int regmap[] =
   DS * 4, ES * 4, FS * 4, GS * 4
 };
 
-int
-cannot_store_register (int regno)
+static int
+i386_cannot_store_register (int regno)
+{
+  return (regno >= i386_num_regs);
+}
+
+static int
+i386_cannot_fetch_register (int regno)
+{
+  return (regno >= i386_num_regs);
+}
+
+
+#ifdef HAVE_LINUX_REGSETS
+#include <sys/procfs.h>
+#include <sys/ptrace.h>
+
+static void
+i386_fill_gregset (void *buf)
+{
+  int i;
+
+  for (i = 0; i < i386_num_regs; i++)
+    collect_register (i, ((char *) buf) + i386_regmap[i]);
+
+  collect_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
+}
+
+static void
+i386_store_gregset (void *buf)
+{
+  int i;
+
+  for (i = 0; i < i386_num_regs; i++)
+    supply_register (i, ((char *) buf) + i386_regmap[i]);
+
+  supply_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
+}
+
+static void
+i386_fill_fpregset (void *buf)
+{
+  i387_cache_to_fsave (buf);
+}
+
+static void
+i386_store_fpregset (void *buf)
+{
+  i387_fsave_to_cache (buf);
+}
+
+static void
+i386_fill_fpxregset (void *buf)
+{
+  i387_cache_to_fxsave (buf);
+}
+
+static void
+i386_store_fpxregset (void *buf)
+{
+  i387_fxsave_to_cache (buf);
+}
+
+
+struct regset_info target_regsets[] = {
+  { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
+    i386_fill_gregset, i386_store_gregset },
+#ifdef HAVE_PTRACE_GETFPXREGS
+  { PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, sizeof (elf_fpxregset_t),
+    i386_fill_fpxregset, i386_store_fpxregset },
+#endif
+  { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
+    i386_fill_fpregset, i386_store_fpregset },
+  { 0, 0, -1, NULL, NULL }
+};
+
+#endif /* HAVE_LINUX_REGSETS */
+
+static const char i386_breakpoint[] = { 0xCC };
+#define i386_breakpoint_len 1
+
+static CORE_ADDR
+i386_stop_pc ()
 {
-  return (regno >= num_regs);
+  unsigned long pc;
+
+  /* Overkill */
+  fetch_inferior_registers (0);
+
+  collect_register_by_name ("eip", &pc);
+  return pc - 1;
 }
 
-int
-cannot_fetch_register (int regno)
+static void
+i386_set_pc (CORE_ADDR newpc)
 {
-  return (regno >= num_regs);
+  supply_register_by_name ("eip", &newpc);
+
+  /* Overkill */
+  store_inferior_registers (0);
 }
+
+struct linux_target_ops the_low_target = {
+  i386_num_regs,
+  i386_regmap,
+  i386_cannot_fetch_register,
+  i386_cannot_store_register,
+  i386_stop_pc,
+  i386_set_pc,
+  i386_breakpoint,
+  i386_breakpoint_len,
+};