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1 | /* Target-dependent code for HP PA-RISC BSD's. |
2 | ||
9b254dd1 | 3 | Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
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4 | |
5 | This file is part of GDB. | |
6 | ||
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
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10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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19 | |
20 | #include "defs.h" | |
dc28f363 | 21 | #include "objfiles.h" |
dc28f363 MK |
22 | #include "target.h" |
23 | #include "value.h" | |
0e56aeaf | 24 | |
dc28f363 MK |
25 | #include "elf/common.h" |
26 | ||
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27 | #include "hppa-tdep.h" |
28 | #include "solib-svr4.h" | |
29 | ||
dc28f363 | 30 | CORE_ADDR |
e38c262f | 31 | hppabsd_find_global_pointer (struct gdbarch *gdbarch, struct value *function) |
dc28f363 MK |
32 | { |
33 | CORE_ADDR faddr = value_as_address (function); | |
34 | struct obj_section *faddr_sec; | |
35 | gdb_byte buf[4]; | |
36 | ||
37 | /* Is this a plabel? If so, dereference it to get the Global Pointer | |
38 | value. */ | |
39 | if (faddr & 2) | |
40 | { | |
41 | if (target_read_memory ((faddr & ~3) + 4, buf, sizeof buf) == 0) | |
42 | return extract_unsigned_integer (buf, sizeof buf); | |
43 | } | |
44 | ||
45 | /* If the address is in the .plt section, then the real function | |
46 | hasn't yet been fixed up by the linker so we cannot determine the | |
47 | Global Pointer for that function. */ | |
48 | if (in_plt_section (faddr, NULL)) | |
49 | return 0; | |
50 | ||
51 | faddr_sec = find_pc_section (faddr); | |
52 | if (faddr_sec != NULL) | |
53 | { | |
54 | struct obj_section *sec; | |
55 | ||
56 | ALL_OBJFILE_OSECTIONS (faddr_sec->objfile, sec) | |
57 | { | |
58 | if (strcmp (sec->the_bfd_section->name, ".dynamic") == 0) | |
59 | break; | |
60 | } | |
61 | ||
62 | if (sec < faddr_sec->objfile->sections_end) | |
63 | { | |
aded6f54 PA |
64 | CORE_ADDR addr = obj_section_addr (sec); |
65 | CORE_ADDR endaddr = obj_section_endaddr (sec); | |
dc28f363 | 66 | |
aded6f54 | 67 | while (addr < endaddr) |
dc28f363 MK |
68 | { |
69 | gdb_byte buf[4]; | |
70 | LONGEST tag; | |
71 | ||
72 | if (target_read_memory (addr, buf, sizeof buf) != 0) | |
73 | break; | |
74 | ||
75 | tag = extract_signed_integer (buf, sizeof buf); | |
76 | if (tag == DT_PLTGOT) | |
77 | { | |
78 | CORE_ADDR pltgot; | |
79 | ||
80 | if (target_read_memory (addr + 4, buf, sizeof buf) != 0) | |
81 | break; | |
82 | ||
af5ca30d | 83 | /* The NetBSD/OpenBSD ld.so doesn't relocate DT_PLTGOT, so |
dc28f363 MK |
84 | we have to do it ourselves. */ |
85 | pltgot = extract_unsigned_integer (buf, sizeof buf); | |
86 | pltgot += ANOFFSET (sec->objfile->section_offsets, | |
87 | SECT_OFF_TEXT (sec->objfile)); | |
af5ca30d | 88 | |
dc28f363 MK |
89 | return pltgot; |
90 | } | |
91 | ||
92 | if (tag == DT_NULL) | |
93 | break; | |
94 | ||
95 | addr += 8; | |
96 | } | |
97 | } | |
98 | } | |
99 | ||
100 | return 0; | |
101 | } | |
102 | \f | |
103 | ||
af5ca30d | 104 | void |
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105 | hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
106 | { | |
107 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
108 | ||
ed944ce7 MK |
109 | /* OpenBSD and NetBSD have a 64-bit 'long double'. */ |
110 | set_gdbarch_long_double_bit (gdbarch, 64); | |
8da61cc4 | 111 | set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double); |
ed944ce7 | 112 | |
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113 | /* OpenBSD and NetBSD use ELF. */ |
114 | tdep->is_elf = 1; | |
34f55018 MK |
115 | tdep->find_global_pointer = hppabsd_find_global_pointer; |
116 | tdep->in_solib_call_trampoline = hppa_in_solib_call_trampoline; | |
117 | set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code); | |
0e56aeaf | 118 | |
ed944ce7 | 119 | /* OpenBSD and NetBSD use SVR4-style shared libraries. */ |
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120 | set_solib_svr4_fetch_link_map_offsets |
121 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); | |
122 | } |