* regset.h (struct core_regset_section): Add HUMAN_NAME.

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

diff --git a/gdb/i386-linux-tdep.c b/gdb/i386-linux-tdep.c
index 748fda05caaefb7322c9728cdd214f894897e2ff..5acd229d6123670bab271cb0d88fe2dfdb8a04ac 100644 (file)
--- a/gdb/i386-linux-tdep.c
+++ b/gdb/i386-linux-tdep.c
@@ -1,6 +1,6 @@
 /* Target-dependent code for GNU/Linux i386.
 
-   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
+   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
    Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -37,6 +37,10 @@
 #include "symtab.h"
 #include "arch-utils.h"
 #include "regset.h"
+#include "xml-syscall.h"
+
+/* The syscall's XML filename for i386.  */
+#define XML_SYSCALL_FILENAME_I386 "syscalls/i386-linux.xml"
 
 #include "record.h"
 #include "linux-record.h"
@@ -45,9 +49,9 @@
 /* Supported register note sections.  */
 static struct core_regset_section i386_linux_regset_sections[] =
 {
-  { ".reg", 144 },
-  { ".reg2", 108 },
-  { ".reg-xfp", 512 },
+  { ".reg", 144, "general-purpose" },
+  { ".reg2", 108, "floating-point" },
+  { ".reg-xfp", 512, "extended floating-point" },
   { NULL, 0 }
 };
 
@@ -354,7 +358,32 @@ i386_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
   regcache_cooked_write_unsigned (regcache, I386_LINUX_ORIG_EAX_REGNUM, -1);
 }
 
-static struct linux_record_tdep i386_linux_record_tdep;
+/* Record all registers but IP register for process-record.  */
+
+static int
+i386_all_but_ip_registers_record (struct regcache *regcache)
+{
+  if (record_arch_list_add_reg (regcache, I386_EAX_REGNUM))
+    return -1;
+  if (record_arch_list_add_reg (regcache, I386_ECX_REGNUM))
+    return -1;
+  if (record_arch_list_add_reg (regcache, I386_EDX_REGNUM))
+    return -1;
+  if (record_arch_list_add_reg (regcache, I386_EBX_REGNUM))
+    return -1;
+  if (record_arch_list_add_reg (regcache, I386_ESP_REGNUM))
+    return -1;
+  if (record_arch_list_add_reg (regcache, I386_EBP_REGNUM))
+    return -1;
+  if (record_arch_list_add_reg (regcache, I386_ESI_REGNUM))
+    return -1;
+  if (record_arch_list_add_reg (regcache, I386_EDI_REGNUM))
+    return -1;
+  if (record_arch_list_add_reg (regcache, I386_EFLAGS_REGNUM))
+    return -1;
+
+  return 0;
+}
 
 /* i386_canonicalize_syscall maps from the native i386 Linux set
    of syscall ids into a canonical set of syscall ids used by
@@ -379,6 +408,8 @@ i386_canonicalize_syscall (int syscall)
 
    Return -1 if something wrong.  */
 
+static struct linux_record_tdep i386_linux_record_tdep;
+
 static int
 i386_linux_intx80_sysenter_record (struct regcache *regcache)
 {
@@ -398,6 +429,14 @@ i386_linux_intx80_sysenter_record (struct regcache *regcache)
       return -1;
     }
 
+  if (syscall_gdb == gdb_sys_sigreturn
+      || syscall_gdb == gdb_sys_rt_sigreturn)
+   {
+     if (i386_all_but_ip_registers_record (regcache))
+       return -1;
+     return 0;
+   }
+
   ret = record_linux_system_call (syscall_gdb, regcache,
                                  &i386_linux_record_tdep);
   if (ret)
@@ -409,8 +448,63 @@ i386_linux_intx80_sysenter_record (struct regcache *regcache)
 
   return 0;
 }
+
+#define I386_LINUX_xstate      270
+#define I386_LINUX_frame_size  732
+
+int
+i386_linux_record_signal (struct gdbarch *gdbarch,
+                          struct regcache *regcache,
+                          enum target_signal signal)
+{
+  ULONGEST esp;
+
+  if (i386_all_but_ip_registers_record (regcache))
+    return -1;
+
+  if (record_arch_list_add_reg (regcache, I386_EIP_REGNUM))
+    return -1;
+
+  /* Record the change in the stack.  */
+  regcache_raw_read_unsigned (regcache, I386_ESP_REGNUM, &esp);
+  /* This is for xstate.
+     sp -= sizeof (struct _fpstate);  */
+  esp -= I386_LINUX_xstate;
+  /* This is for frame_size.
+     sp -= sizeof (struct rt_sigframe);  */
+  esp -= I386_LINUX_frame_size;
+  if (record_arch_list_add_mem (esp,
+                                I386_LINUX_xstate + I386_LINUX_frame_size))
+    return -1;
+
+  if (record_arch_list_add_end ())
+    return -1;
+
+  return 0;
+}
 \f
 
+static LONGEST
+i386_linux_get_syscall_number (struct gdbarch *gdbarch,
+                               ptid_t ptid)
+{
+  struct regcache *regcache = get_thread_regcache (ptid);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+  /* The content of a register.  */
+  gdb_byte buf[4];
+  /* The result.  */
+  LONGEST ret;
+
+  /* Getting the system call number from the register.
+     When dealing with x86 architecture, this information
+     is stored at %eax register.  */
+  regcache_cooked_read (regcache, I386_LINUX_ORIG_EAX_REGNUM, buf);
+
+  ret = extract_signed_integer (buf, 4, byte_order);
+
+  return ret;
+}
+
 /* The register sets used in GNU/Linux ELF core-dumps are identical to
    the register sets in `struct user' that are used for a.out
    core-dumps.  These are also used by ptrace(2).  The corresponding
@@ -504,6 +598,7 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   tdep->sc_num_regs = ARRAY_SIZE (i386_linux_sc_reg_offset);
 
   set_gdbarch_process_record (gdbarch, i386_process_record);
+  set_gdbarch_process_record_signal (gdbarch, i386_linux_record_signal);
 
   /* Initialize the i386_linux_record_tdep.  */
   /* These values are the size of the type that will be used in a system
@@ -697,6 +792,11 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   set_gdbarch_displaced_step_location (gdbarch,
                                        displaced_step_at_entry_point);
 
+  /* Functions for 'catch syscall'.  */
+  set_xml_syscall_file_name (XML_SYSCALL_FILENAME_I386);
+  set_gdbarch_get_syscall_number (gdbarch,
+                                  i386_linux_get_syscall_number);
+
   set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
 }