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0e56aeaf MK |
1 | /* Target-dependent code for HP PA-RISC BSD's. |
2 | ||
28e7fd62 | 3 | Copyright (C) 2004-2013 Free Software Foundation, Inc. |
0e56aeaf MK |
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 |
0e56aeaf MK |
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 | ||
0e56aeaf | 27 | #include "hppa-tdep.h" |
63807e1d | 28 | #include "hppabsd-tdep.h" |
0e56aeaf MK |
29 | #include "solib-svr4.h" |
30 | ||
63807e1d | 31 | static CORE_ADDR |
e38c262f | 32 | hppabsd_find_global_pointer (struct gdbarch *gdbarch, struct value *function) |
dc28f363 | 33 | { |
e17a4113 | 34 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
dc28f363 MK |
35 | CORE_ADDR faddr = value_as_address (function); |
36 | struct obj_section *faddr_sec; | |
37 | gdb_byte buf[4]; | |
38 | ||
39 | /* Is this a plabel? If so, dereference it to get the Global Pointer | |
40 | value. */ | |
41 | if (faddr & 2) | |
42 | { | |
43 | if (target_read_memory ((faddr & ~3) + 4, buf, sizeof buf) == 0) | |
e17a4113 | 44 | return extract_unsigned_integer (buf, sizeof buf, byte_order); |
dc28f363 MK |
45 | } |
46 | ||
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; | |
52 | ||
53 | faddr_sec = find_pc_section (faddr); | |
54 | if (faddr_sec != NULL) | |
55 | { | |
56 | struct obj_section *sec; | |
57 | ||
58 | ALL_OBJFILE_OSECTIONS (faddr_sec->objfile, sec) | |
59 | { | |
60 | if (strcmp (sec->the_bfd_section->name, ".dynamic") == 0) | |
61 | break; | |
62 | } | |
63 | ||
64 | if (sec < faddr_sec->objfile->sections_end) | |
65 | { | |
aded6f54 PA |
66 | CORE_ADDR addr = obj_section_addr (sec); |
67 | CORE_ADDR endaddr = obj_section_endaddr (sec); | |
dc28f363 | 68 | |
aded6f54 | 69 | while (addr < endaddr) |
dc28f363 MK |
70 | { |
71 | gdb_byte buf[4]; | |
72 | LONGEST tag; | |
73 | ||
74 | if (target_read_memory (addr, buf, sizeof buf) != 0) | |
75 | break; | |
76 | ||
e17a4113 | 77 | tag = extract_signed_integer (buf, sizeof buf, byte_order); |
dc28f363 MK |
78 | if (tag == DT_PLTGOT) |
79 | { | |
80 | CORE_ADDR pltgot; | |
81 | ||
82 | if (target_read_memory (addr + 4, buf, sizeof buf) != 0) | |
83 | break; | |
84 | ||
af5ca30d | 85 | /* The NetBSD/OpenBSD ld.so doesn't relocate DT_PLTGOT, so |
dc28f363 | 86 | we have to do it ourselves. */ |
e17a4113 UW |
87 | pltgot = extract_unsigned_integer (buf, sizeof buf, |
88 | byte_order); | |
dc28f363 MK |
89 | pltgot += ANOFFSET (sec->objfile->section_offsets, |
90 | SECT_OFF_TEXT (sec->objfile)); | |
af5ca30d | 91 | |
dc28f363 MK |
92 | return pltgot; |
93 | } | |
94 | ||
95 | if (tag == DT_NULL) | |
96 | break; | |
97 | ||
98 | addr += 8; | |
99 | } | |
100 | } | |
101 | } | |
102 | ||
103 | return 0; | |
104 | } | |
105 | \f | |
106 | ||
af5ca30d | 107 | void |
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108 | hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
109 | { | |
110 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
111 | ||
ed944ce7 MK |
112 | /* OpenBSD and NetBSD have a 64-bit 'long double'. */ |
113 | set_gdbarch_long_double_bit (gdbarch, 64); | |
8da61cc4 | 114 | set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double); |
ed944ce7 | 115 | |
0e56aeaf MK |
116 | /* OpenBSD and NetBSD use ELF. */ |
117 | tdep->is_elf = 1; | |
34f55018 MK |
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); | |
0e56aeaf | 121 | |
ed944ce7 | 122 | /* OpenBSD and NetBSD use SVR4-style shared libraries. */ |
0e56aeaf MK |
123 | set_solib_svr4_fetch_link_map_offsets |
124 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); | |
125 | } |