Normalize names of some source files

[deliverable/binutils-gdb.git] / gdb / hppa-bsd-tdep.c

diff --git a/gdb/hppa-bsd-tdep.c b/gdb/hppa-bsd-tdep.c
new file mode 100644 (file)
index 0000000..2c581c4
--- /dev/null
+++ b/gdb/hppa-bsd-tdep.c
@@ -0,0 +1,141 @@
+/* Target-dependent code for HP PA-RISC BSD's.
+
+   Copyright (C) 2004-2016 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
+   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,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   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, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "objfiles.h"
+#include "target.h"
+#include "value.h"
+
+#include "elf/common.h"
+
+#include "hppa-tdep.h"
+#include "hppa-bsd-tdep.h"
+#include "dwarf2-frame.h"
+#include "solib-svr4.h"
+
+static CORE_ADDR
+hppabsd_find_global_pointer (struct gdbarch *gdbarch, struct value *function)
+{
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+  CORE_ADDR faddr = value_as_address (function);
+  struct obj_section *faddr_sec;
+  gdb_byte buf[4];
+
+  /* Is this a plabel? If so, dereference it to get the Global Pointer
+     value.  */
+  if (faddr & 2)
+    {
+      if (target_read_memory ((faddr & ~3) + 4, buf, sizeof buf) == 0)
+       return extract_unsigned_integer (buf, sizeof buf, byte_order);
+    }
+
+  /* If the address is in the .plt section, then the real function
+     hasn't yet been fixed up by the linker so we cannot determine the
+     Global Pointer for that function.  */
+  if (in_plt_section (faddr))
+    return 0;
+
+  faddr_sec = find_pc_section (faddr);
+  if (faddr_sec != NULL)
+    {
+      struct obj_section *sec;
+
+      ALL_OBJFILE_OSECTIONS (faddr_sec->objfile, sec)
+       {
+         if (strcmp (sec->the_bfd_section->name, ".dynamic") == 0)
+           break;
+       }
+
+      if (sec < faddr_sec->objfile->sections_end)
+       {
+         CORE_ADDR addr = obj_section_addr (sec);
+         CORE_ADDR endaddr = obj_section_endaddr (sec);
+
+         while (addr < endaddr)
+           {
+             gdb_byte buf[4];
+             LONGEST tag;
+
+             if (target_read_memory (addr, buf, sizeof buf) != 0)
+               break;
+
+             tag = extract_signed_integer (buf, sizeof buf, byte_order);
+             if (tag == DT_PLTGOT)
+               {
+                 CORE_ADDR pltgot;
+
+                 if (target_read_memory (addr + 4, buf, sizeof buf) != 0)
+                   break;
+
+                 /* The NetBSD/OpenBSD ld.so doesn't relocate DT_PLTGOT, so
+                    we have to do it ourselves.  */
+                 pltgot = extract_unsigned_integer (buf, sizeof buf,
+                                                    byte_order);
+                 pltgot += ANOFFSET (sec->objfile->section_offsets,
+                                     SECT_OFF_TEXT (sec->objfile));
+
+                 return pltgot;
+               }
+
+             if (tag == DT_NULL)
+               break;
+
+             addr += 8;
+           }
+       }
+    }
+
+  return 0;
+}
+\f
+
+static void
+hppabsd_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
+                              struct dwarf2_frame_state_reg *reg,
+                              struct frame_info *this_frame)
+{
+  if (regnum == HPPA_PCOQ_HEAD_REGNUM)
+    reg->how = DWARF2_FRAME_REG_RA;
+  else if (regnum == HPPA_SP_REGNUM)
+    reg->how = DWARF2_FRAME_REG_CFA;
+}
+
+void
+hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  /* OpenBSD and NetBSD have a 64-bit 'long double'.  */
+  set_gdbarch_long_double_bit (gdbarch, 64);
+  set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
+
+  /* OpenBSD and NetBSD use ELF.  */
+  tdep->is_elf = 1;
+  tdep->find_global_pointer = hppabsd_find_global_pointer;
+  tdep->in_solib_call_trampoline = hppa_in_solib_call_trampoline;
+  set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code);
+
+  /* OpenBSD and NetBSD use SVR4-style shared libraries.  */
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+  /* Hook in the DWARF CFI frame unwinder.  */
+  dwarf2_frame_set_init_reg (gdbarch, hppabsd_dwarf2_frame_init_reg);
+  dwarf2_append_unwinders (gdbarch);
+}