1 /* Target-dependent code for HPUX running on PA-RISC, for GDB.
3 Copyright 2002, 2003 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 2 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, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 #include "arch-utils.h"
25 #include "gdb_string.h"
28 /* Forward declarations. */
29 extern void _initialize_hppa_hpux_tdep (void);
30 extern initialize_file_ftype _initialize_hppa_hpux_tdep;
32 /* FIXME: brobecker 2002-12-25. The following functions will eventually
33 become static, after the multiarching conversion is done. */
34 int hppa_hpux_pc_in_sigtramp (CORE_ADDR pc, char *name);
35 void hppa32_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi,
37 void hppa32_hpux_frame_base_before_sigtramp (struct frame_info *fi,
39 void hppa32_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi,
41 void hppa64_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi,
43 void hppa64_hpux_frame_base_before_sigtramp (struct frame_info *fi,
45 void hppa64_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi,
49 hppa_hpux_pc_in_sigtramp (CORE_ADDR pc, char *name)
51 /* Actually, for a PA running HPUX the kernel calls the signal handler
52 without an intermediate trampoline. Luckily the kernel always sets
53 the return pointer for the signal handler to point to _sigreturn. */
54 return (name && (strcmp ("_sigreturn", name) == 0));
57 /* For hppa32_hpux_frame_saved_pc_in_sigtramp,
58 hppa32_hpux_frame_base_before_sigtramp and
59 hppa32_hpux_frame_find_saved_regs_in_sigtramp:
61 The signal context structure pointer is always saved at the base
62 of the frame which "calls" the signal handler. We only want to find
63 the hardware save state structure, which lives 10 32bit words into
66 Within the hardware save state structure, registers are found in the
67 same order as the register numbers in GDB.
69 At one time we peeked at %r31 rather than the PC queues to determine
70 what instruction took the fault. This was done on purpose, but I don't
71 remember why. Looking at the PC queues is really the right way, and
72 I don't remember why that didn't work when this code was originally
76 hppa32_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi, CORE_ADDR *tmp)
78 *tmp = read_memory_integer (get_frame_base (fi) + (43 * 4), 4);
82 hppa32_hpux_frame_base_before_sigtramp (struct frame_info *fi,
85 *tmp = read_memory_integer (get_frame_base (fi) + (40 * 4), 4);
89 hppa32_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi,
93 const CORE_ADDR tmp = get_frame_base (fi) + (10 * 4);
95 for (i = 0; i < NUM_REGS; i++)
98 fsr[SP_REGNUM] = read_memory_integer (tmp + SP_REGNUM * 4, 4);
100 fsr[i] = tmp + i * 4;
104 /* For hppa64_hpux_frame_saved_pc_in_sigtramp,
105 hppa64_hpux_frame_base_before_sigtramp and
106 hppa64_hpux_frame_find_saved_regs_in_sigtramp:
108 These functions are the PA64 ABI equivalents of the 32bits counterparts
109 above. See the comments there.
111 For PA64, the save_state structure is at an offset of 24 32-bit words
112 from the sigcontext structure. The 64 bit general registers are at an
113 offset of 640 bytes from the beginning of the save_state structure,
114 and the floating pointer register are at an offset of 256 bytes from
115 the beginning of the save_state structure. */
118 hppa64_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi, CORE_ADDR *tmp)
120 *tmp = read_memory_integer
121 (get_frame_base (fi) + (24 * 4) + 640 + (33 * 8), 8);
125 hppa64_hpux_frame_base_before_sigtramp (struct frame_info *fi,
128 *tmp = read_memory_integer
129 (get_frame_base (fi) + (24 * 4) + 640 + (30 * 8), 8);
133 hppa64_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi,
137 const CORE_ADDR tmp1 = get_frame_base (fi) + (24 * 4) + 640;
138 const CORE_ADDR tmp2 = get_frame_base (fi) + (24 * 4) + 256;
140 for (i = 0; i < NUM_REGS; i++)
143 fsr[SP_REGNUM] = read_memory_integer (tmp1 + SP_REGNUM * 8, 8);
144 else if (i >= FP0_REGNUM)
145 fsr[i] = tmp2 + (i - FP0_REGNUM) * 8;
147 fsr[i] = tmp1 + i * 8;
152 hppa_hpux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
154 set_gdbarch_pc_in_sigtramp (gdbarch, hppa_hpux_pc_in_sigtramp);
158 hppa_hpux_som_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
160 hppa_hpux_init_abi (info, gdbarch);
164 hppa_hpux_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
166 hppa_hpux_init_abi (info, gdbarch);
170 _initialize_hppa_hpux_tdep (void)
172 gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_HPUX_SOM,
173 hppa_hpux_som_init_abi);
174 gdbarch_register_osabi (bfd_arch_hppa, bfd_mach_hppa20w, GDB_OSABI_HPUX_ELF,
175 hppa_hpux_elf_init_abi);