* ppc-opc.c (powerpc_opcodes) <"lswx">: Use RAX for the second and
[binutils-gdb.git] / gdb / hppabsd-tdep.c
blob5605abbc4a12c17d6e7f2399e20a9d8822306a97
1 /* Target-dependent code for HP PA-RISC BSD's.
3 Copyright (C) 2004-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "defs.h"
21 #include "objfiles.h"
22 #include "target.h"
23 #include "value.h"
25 #include "elf/common.h"
27 #include "hppa-tdep.h"
28 #include "hppabsd-tdep.h"
29 #include "solib-svr4.h"
31 static CORE_ADDR
32 hppabsd_find_global_pointer (struct gdbarch *gdbarch, struct value *function)
34 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
35 CORE_ADDR faddr = value_as_address (function);
36 struct obj_section *faddr_sec;
37 gdb_byte buf[4];
39 /* Is this a plabel? If so, dereference it to get the Global Pointer
40 value. */
41 if (faddr & 2)
43 if (target_read_memory ((faddr & ~3) + 4, buf, sizeof buf) == 0)
44 return extract_unsigned_integer (buf, sizeof buf, byte_order);
47 /* If the address is in the .plt section, then the real function
48 hasn't yet been fixed up by the linker so we cannot determine the
49 Global Pointer for that function. */
50 if (in_plt_section (faddr, NULL))
51 return 0;
53 faddr_sec = find_pc_section (faddr);
54 if (faddr_sec != NULL)
56 struct obj_section *sec;
58 ALL_OBJFILE_OSECTIONS (faddr_sec->objfile, sec)
60 if (strcmp (sec->the_bfd_section->name, ".dynamic") == 0)
61 break;
64 if (sec < faddr_sec->objfile->sections_end)
66 CORE_ADDR addr = obj_section_addr (sec);
67 CORE_ADDR endaddr = obj_section_endaddr (sec);
69 while (addr < endaddr)
71 gdb_byte buf[4];
72 LONGEST tag;
74 if (target_read_memory (addr, buf, sizeof buf) != 0)
75 break;
77 tag = extract_signed_integer (buf, sizeof buf, byte_order);
78 if (tag == DT_PLTGOT)
80 CORE_ADDR pltgot;
82 if (target_read_memory (addr + 4, buf, sizeof buf) != 0)
83 break;
85 /* The NetBSD/OpenBSD ld.so doesn't relocate DT_PLTGOT, so
86 we have to do it ourselves. */
87 pltgot = extract_unsigned_integer (buf, sizeof buf,
88 byte_order);
89 pltgot += ANOFFSET (sec->objfile->section_offsets,
90 SECT_OFF_TEXT (sec->objfile));
92 return pltgot;
95 if (tag == DT_NULL)
96 break;
98 addr += 8;
103 return 0;
107 void
108 hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
110 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
112 /* OpenBSD and NetBSD have a 64-bit 'long double'. */
113 set_gdbarch_long_double_bit (gdbarch, 64);
114 set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
116 /* OpenBSD and NetBSD use ELF. */
117 tdep->is_elf = 1;
118 tdep->find_global_pointer = hppabsd_find_global_pointer;
119 tdep->in_solib_call_trampoline = hppa_in_solib_call_trampoline;
120 set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code);
122 /* OpenBSD and NetBSD use SVR4-style shared libraries. */
123 set_solib_svr4_fetch_link_map_offsets
124 (gdbarch, svr4_ilp32_fetch_link_map_offsets);