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273f8429 | 1 | /* Target-dependent code for HPUX running on PA-RISC, for GDB. |
ef6e7e13 AC |
2 | |
3 | Copyright 2002, 2003 Free Software Foundation, Inc. | |
273f8429 JB |
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 | |
9 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "defs.h" | |
22 | #include "arch-utils.h" | |
60e1ff27 | 23 | #include "gdbcore.h" |
273f8429 | 24 | #include "osabi.h" |
65e82032 | 25 | #include "gdb_string.h" |
273f8429 JB |
26 | |
27 | /* Forward declarations. */ | |
28 | extern void _initialize_hppa_hpux_tdep (void); | |
29 | extern initialize_file_ftype _initialize_hppa_hpux_tdep; | |
30 | ||
60e1ff27 JB |
31 | /* FIXME: brobecker 2002-12-25. The following functions will eventually |
32 | become static, after the multiarching conversion is done. */ | |
33 | int hppa_hpux_pc_in_sigtramp (CORE_ADDR pc, char *name); | |
34 | void hppa_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi, | |
35 | CORE_ADDR *tmp); | |
36 | void hppa_hpux_frame_base_before_sigtramp (struct frame_info *fi, | |
37 | CORE_ADDR *tmp); | |
38 | void hppa_hpux_frame_find_saved_regs_in_sigtramp | |
43bd9a9e | 39 | (struct frame_info *fi, CORE_ADDR *fsr); |
60e1ff27 JB |
40 | |
41 | int | |
42 | hppa_hpux_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
43 | { | |
44 | /* Actually, for a PA running HPUX the kernel calls the signal handler | |
45 | without an intermediate trampoline. Luckily the kernel always sets | |
46 | the return pointer for the signal handler to point to _sigreturn. */ | |
47 | return (name && (strcmp ("_sigreturn", name) == 0)); | |
48 | } | |
49 | ||
50 | /* For hppa_hpux_frame_saved_pc_in_sigtramp, | |
51 | hppa_hpux_frame_base_before_sigtramp and | |
52 | hppa_hpux_frame_find_saved_regs_in_sigtramp: | |
53 | ||
54 | The signal context structure pointer is always saved at the base | |
55 | of the frame which "calls" the signal handler. We only want to find | |
56 | the hardware save state structure, which lives 10 32bit words into | |
57 | sigcontext structure. | |
58 | ||
59 | Within the hardware save state structure, registers are found in the | |
60 | same order as the register numbers in GDB. | |
61 | ||
62 | At one time we peeked at %r31 rather than the PC queues to determine | |
63 | what instruction took the fault. This was done on purpose, but I don't | |
64 | remember why. Looking at the PC queues is really the right way, and | |
65 | I don't remember why that didn't work when this code was originally | |
66 | written. */ | |
67 | ||
68 | void | |
69 | hppa_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi, CORE_ADDR *tmp) | |
70 | { | |
ef6e7e13 | 71 | *tmp = read_memory_integer (get_frame_base (fi) + (43 * 4), 4); |
60e1ff27 JB |
72 | } |
73 | ||
74 | void | |
75 | hppa_hpux_frame_base_before_sigtramp (struct frame_info *fi, | |
76 | CORE_ADDR *tmp) | |
77 | { | |
ef6e7e13 | 78 | *tmp = read_memory_integer (get_frame_base (fi) + (40 * 4), 4); |
60e1ff27 JB |
79 | } |
80 | ||
81 | void | |
82 | hppa_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi, | |
43bd9a9e | 83 | CORE_ADDR *fsr) |
60e1ff27 JB |
84 | { |
85 | int i; | |
ef6e7e13 | 86 | const CORE_ADDR tmp = get_frame_base (fi) + (10 * 4); |
60e1ff27 JB |
87 | |
88 | for (i = 0; i < NUM_REGS; i++) | |
89 | { | |
90 | if (i == SP_REGNUM) | |
43bd9a9e | 91 | fsr[SP_REGNUM] = read_memory_integer (tmp + SP_REGNUM * 4, 4); |
60e1ff27 | 92 | else |
43bd9a9e | 93 | fsr[i] = tmp + i * 4; |
60e1ff27 JB |
94 | } |
95 | } | |
96 | ||
7d773d96 JB |
97 | static void |
98 | hppa_hpux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
99 | { | |
100 | set_gdbarch_pc_in_sigtramp (gdbarch, hppa_hpux_pc_in_sigtramp); | |
101 | } | |
60e1ff27 | 102 | |
273f8429 JB |
103 | static void |
104 | hppa_hpux_som_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
105 | { | |
7d773d96 | 106 | hppa_hpux_init_abi (info, gdbarch); |
273f8429 JB |
107 | } |
108 | ||
109 | static void | |
110 | hppa_hpux_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
111 | { | |
7d773d96 | 112 | hppa_hpux_init_abi (info, gdbarch); |
273f8429 JB |
113 | } |
114 | ||
115 | void | |
116 | _initialize_hppa_hpux_tdep (void) | |
117 | { | |
05816f70 | 118 | gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_HPUX_SOM, |
273f8429 | 119 | hppa_hpux_som_init_abi); |
05816f70 | 120 | gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_HPUX_ELF, |
273f8429 JB |
121 | hppa_hpux_elf_init_abi); |
122 | } |