2019-12-18 Anthony Green <green@moxielogic.com>

[deliverable/binutils-gdb.git] / gdb / ia64-linux-tdep.c

diff --git a/gdb/ia64-linux-tdep.c b/gdb/ia64-linux-tdep.c
index 10de3ddf39f95ab59fd0ae0bc9058e624007bdfe..f1954911a714527cd31416f65a662550c31c3534 100644 (file)
--- a/gdb/ia64-linux-tdep.c
+++ b/gdb/ia64-linux-tdep.c
@@ -1,12 +1,12 @@
 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
 
 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
 

-   Copyright (C) 2000, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2000-2019 Free Software Foundation, Inc.

 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or

    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,


@@ -15,9 +15,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    GNU General Public License for more details.
 
    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., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 #include "defs.h"
 #include "ia64-tdep.h"
 
 #include "defs.h"
 #include "ia64-tdep.h"


@@ -26,38 +24,46 @@
 #include "regcache.h"
 #include "osabi.h"
 #include "solib-svr4.h"
 #include "regcache.h"
 #include "osabi.h"
 #include "solib-svr4.h"

+#include "symtab.h"
+#include "linux-tdep.h"
+#include "regset.h"
+
+#include <ctype.h>

 
 /* The sigtramp code is in a non-readable (executable-only) region
    of memory called the ``gate page''.  The addresses in question
    were determined by examining the system headers.  They are
 
 /* The sigtramp code is in a non-readable (executable-only) region
    of memory called the ``gate page''.  The addresses in question
    were determined by examining the system headers.  They are

-   overly generous to allow for different pages sizes. */
+   overly generous to allow for different pages sizes.  */

 
 #define GATE_AREA_START 0xa000000000000100LL
 #define GATE_AREA_END   0xa000000000020000LL
 
 
 #define GATE_AREA_START 0xa000000000000100LL
 #define GATE_AREA_END   0xa000000000020000LL
 

-/* Offset to sigcontext structure from frame of handler */
+/* Offset to sigcontext structure from frame of handler.  */

 #define IA64_LINUX_SIGCONTEXT_OFFSET 192
 
 #define IA64_LINUX_SIGCONTEXT_OFFSET 192
 

-int
-ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name)
+static int
+ia64_linux_pc_in_sigtramp (CORE_ADDR pc)

 {
   return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END);
 }
 
 /* IA-64 GNU/Linux specific function which, given a frame address and
    a register number, returns the address at which that register may be
 {
   return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END);
 }
 
 /* IA-64 GNU/Linux specific function which, given a frame address and
    a register number, returns the address at which that register may be

-   found.  0 is returned for registers which aren't stored in the the
-   sigcontext structure. */
+   found.  0 is returned for registers which aren't stored in the
+   sigcontext structure.  */

 
 static CORE_ADDR
 
 static CORE_ADDR

-ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
+ia64_linux_sigcontext_register_address (struct gdbarch *gdbarch,
+                                       CORE_ADDR sp, int regno)

 {
 {

-  char buf[8];
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+  gdb_byte buf[8];

   CORE_ADDR sigcontext_addr = 0;
 
   CORE_ADDR sigcontext_addr = 0;
 

-  /* The address of the sigcontext area is found at offset 16 in the sigframe.  */
+  /* The address of the sigcontext area is found at offset 16 in the
+     sigframe.  */

   read_memory (sp + 16, buf, 8);
   read_memory (sp + 16, buf, 8);

-  sigcontext_addr = extract_unsigned_integer (buf, 8);
+  sigcontext_addr = extract_unsigned_integer (buf, 8, byte_order);

 
   if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
     return sigcontext_addr + 200 + 8 * (regno - IA64_GR0_REGNUM);
 
   if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
     return sigcontext_addr + 200 + 8 * (regno - IA64_GR0_REGNUM);


@@ -76,7 +82,7 @@ ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
        return sigcontext_addr + 56;            /* user mask only */
       /* sc_ar_rsc is provided, from which we could compute bspstore, but
         I don't think it's worth it.  Anyway, if we want it, it's at offset
        return sigcontext_addr + 56;            /* user mask only */
       /* sc_ar_rsc is provided, from which we could compute bspstore, but
         I don't think it's worth it.  Anyway, if we want it, it's at offset

-        64 */
+        64.  */

       case IA64_BSP_REGNUM :
        return sigcontext_addr + 72;
       case IA64_RNAT_REGNUM :
       case IA64_BSP_REGNUM :
        return sigcontext_addr + 72;
       case IA64_RNAT_REGNUM :


@@ -99,9 +105,9 @@ ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
 }
 
 static void
 }
 
 static void

-ia64_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
+ia64_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)

 {
 {

-  ia64_write_pc (pc, ptid);
+  ia64_write_pc (regcache, pc);

 
   /* We must be careful with modifying the instruction-pointer: if we
      just interrupt a system call, the kernel would ordinarily try to
 
   /* We must be careful with modifying the instruction-pointer: if we
      just interrupt a system call, the kernel would ordinarily try to


@@ -112,23 +118,144 @@ ia64_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
 
      The clearing of r10 is safe as long as ia64_write_pc() is only
      called as part of setting up an inferior call.  */
 
      The clearing of r10 is safe as long as ia64_write_pc() is only
      called as part of setting up an inferior call.  */

-  write_register_pid (IA64_GR10_REGNUM, 0, ptid);
+  regcache_cooked_write_unsigned (regcache, IA64_GR10_REGNUM, 0);
+}
+
+/* Implementation of `gdbarch_stap_is_single_operand', as defined in
+   gdbarch.h.  */
+
+static int
+ia64_linux_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
+{
+  return ((isdigit (*s) && s[1] == '[' && s[2] == 'r') /* Displacement.  */
+         || *s == 'r' /* Register value.  */
+         || isdigit (*s));  /* Literal number.  */
+}
+
+/* Core file support. */
+
+static const struct regcache_map_entry ia64_linux_gregmap[] =
+  {
+    { 32, IA64_GR0_REGNUM, 8 },        /* r0 ... r31 */
+    { 1, REGCACHE_MAP_SKIP, 8 }, /* FIXME: NAT collection bits? */
+    { 1, IA64_PR_REGNUM, 8 },
+    { 8, IA64_BR0_REGNUM, 8 }, /* b0 ... b7 */
+    { 1, IA64_IP_REGNUM, 8 },
+    { 1, IA64_CFM_REGNUM, 8 },
+    { 1, IA64_PSR_REGNUM, 8 },
+    { 1, IA64_RSC_REGNUM, 8 },
+    { 1, IA64_BSP_REGNUM, 8 },
+    { 1, IA64_BSPSTORE_REGNUM, 8 },
+    { 1, IA64_RNAT_REGNUM, 8 },
+    { 1, IA64_CCV_REGNUM, 8 },
+    { 1, IA64_UNAT_REGNUM, 8 },
+    { 1, IA64_FPSR_REGNUM, 8 },
+    { 1, IA64_PFS_REGNUM, 8 },
+    { 1, IA64_LC_REGNUM, 8 },
+    { 1, IA64_EC_REGNUM, 8 },
+    { 0 }
+  };
+
+/* Size of 'gregset_t', as defined by the Linux kernel.  Note that
+   this is more than actually mapped in the regmap above.  */
+
+#define IA64_LINUX_GREGS_SIZE (128 * 8)
+
+static const struct regcache_map_entry ia64_linux_fpregmap[] =
+  {
+    { 128, IA64_FR0_REGNUM, 16 }, /* f0 ... f127 */
+    { 0 }
+  };
+
+#define IA64_LINUX_FPREGS_SIZE (128 * 16)
+
+static void
+ia64_linux_supply_fpregset (const struct regset *regset,
+                           struct regcache *regcache,
+                           int regnum, const void *regs, size_t len)
+{
+  const gdb_byte f_zero[16] = { 0 };
+  const gdb_byte f_one[16] =
+    { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0xff, 0, 0, 0, 0, 0, 0 };
+
+  regcache_supply_regset (regset, regcache, regnum, regs, len);
+
+  /* Kernel generated cores have fr1==0 instead of 1.0.  Older GDBs
+     did the same.  So ignore whatever might be recorded in fpregset_t
+     for fr0/fr1 and always supply their expected values.  */
+  if (regnum == -1 || regnum == IA64_FR0_REGNUM)
+    regcache->raw_supply (IA64_FR0_REGNUM, f_zero);
+  if (regnum == -1 || regnum == IA64_FR1_REGNUM)
+    regcache->raw_supply (IA64_FR1_REGNUM, f_one);
+}
+
+static const struct regset ia64_linux_gregset =
+  {
+    ia64_linux_gregmap,
+    regcache_supply_regset, regcache_collect_regset
+  };
+
+static const struct regset ia64_linux_fpregset =
+  {
+    ia64_linux_fpregmap,
+    ia64_linux_supply_fpregset, regcache_collect_regset
+  };
+
+static void
+ia64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+                                        iterate_over_regset_sections_cb *cb,
+                                        void *cb_data,
+                                        const struct regcache *regcache)
+{
+  cb (".reg", IA64_LINUX_GREGS_SIZE, IA64_LINUX_GREGS_SIZE, &ia64_linux_gregset,
+      NULL, cb_data);
+  cb (".reg2", IA64_LINUX_FPREGS_SIZE, IA64_LINUX_FPREGS_SIZE,
+      &ia64_linux_fpregset, NULL, cb_data);

 }
 
 static void
 ia64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 }
 
 static void
 ia64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

+  static const char *const stap_register_prefixes[] = { "r", NULL };
+  static const char *const stap_register_indirection_prefixes[] = { "[",
+                                                                   NULL };
+  static const char *const stap_register_indirection_suffixes[] = { "]",
+                                                                   NULL };
+
+  linux_init_abi (info, gdbarch);

 
   /* Set the method of obtaining the sigcontext addresses at which
      registers are saved.  */
   tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address;
 
 
   /* Set the method of obtaining the sigcontext addresses at which
      registers are saved.  */
   tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address;
 

+  /* Set the pc_in_sigtramp method.  */
+  tdep->pc_in_sigtramp = ia64_linux_pc_in_sigtramp;
+

   set_gdbarch_write_pc (gdbarch, ia64_linux_write_pc);
 
   set_gdbarch_write_pc (gdbarch, ia64_linux_write_pc);
 

+  set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, svr4_lp64_fetch_link_map_offsets);
+

   /* Enable TLS support.  */
   set_gdbarch_fetch_tls_load_module_address (gdbarch,
                                              svr4_fetch_objfile_link_map);
   /* Enable TLS support.  */
   set_gdbarch_fetch_tls_load_module_address (gdbarch,
                                              svr4_fetch_objfile_link_map);

+
+  /* Core file support. */
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, ia64_linux_iterate_over_regset_sections);
+
+  /* SystemTap related.  */
+  set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes);
+  set_gdbarch_stap_register_indirection_prefixes (gdbarch,
+                                         stap_register_indirection_prefixes);
+  set_gdbarch_stap_register_indirection_suffixes (gdbarch,
+                                           stap_register_indirection_suffixes);
+  set_gdbarch_stap_gdb_register_prefix (gdbarch, "r");
+  set_gdbarch_stap_is_single_operand (gdbarch,
+                                     ia64_linux_stap_is_single_operand);

 }
 
 void
 }
 
 void