| /* Target-dependent code for HPUX running on PA-RISC, for GDB. |
| Copyright 2002 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "arch-utils.h" |
| #include "gdbcore.h" |
| #include "osabi.h" |
| |
| /* Forward declarations. */ |
| extern void _initialize_hppa_hpux_tdep (void); |
| extern initialize_file_ftype _initialize_hppa_hpux_tdep; |
| |
| /* FIXME: brobecker 2002-12-25. The following functions will eventually |
| become static, after the multiarching conversion is done. */ |
| int hppa_hpux_pc_in_sigtramp (CORE_ADDR pc, char *name); |
| void hppa_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi, |
| CORE_ADDR *tmp); |
| void hppa_hpux_frame_base_before_sigtramp (struct frame_info *fi, |
| CORE_ADDR *tmp); |
| void hppa_hpux_frame_find_saved_regs_in_sigtramp |
| (struct frame_info *fi, struct frame_saved_regs *fsr); |
| |
| int |
| hppa_hpux_pc_in_sigtramp (CORE_ADDR pc, char *name) |
| { |
| /* Actually, for a PA running HPUX the kernel calls the signal handler |
| without an intermediate trampoline. Luckily the kernel always sets |
| the return pointer for the signal handler to point to _sigreturn. */ |
| return (name && (strcmp ("_sigreturn", name) == 0)); |
| } |
| |
| /* For hppa_hpux_frame_saved_pc_in_sigtramp, |
| hppa_hpux_frame_base_before_sigtramp and |
| hppa_hpux_frame_find_saved_regs_in_sigtramp: |
| |
| The signal context structure pointer is always saved at the base |
| of the frame which "calls" the signal handler. We only want to find |
| the hardware save state structure, which lives 10 32bit words into |
| sigcontext structure. |
| |
| Within the hardware save state structure, registers are found in the |
| same order as the register numbers in GDB. |
| |
| At one time we peeked at %r31 rather than the PC queues to determine |
| what instruction took the fault. This was done on purpose, but I don't |
| remember why. Looking at the PC queues is really the right way, and |
| I don't remember why that didn't work when this code was originally |
| written. */ |
| |
| void |
| hppa_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi, CORE_ADDR *tmp) |
| { |
| *tmp = read_memory_integer (fi->frame + (43 * 4), 4); |
| } |
| |
| void |
| hppa_hpux_frame_base_before_sigtramp (struct frame_info *fi, |
| CORE_ADDR *tmp) |
| { |
| *tmp = read_memory_integer (fi->frame + (40 * 4), 4); |
| } |
| |
| void |
| hppa_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi, |
| struct frame_saved_regs *fsr) |
| { |
| int i; |
| const CORE_ADDR tmp = (fi)->frame + (10 * 4); |
| |
| for (i = 0; i < NUM_REGS; i++) |
| { |
| if (i == SP_REGNUM) |
| (fsr)->regs[SP_REGNUM] = read_memory_integer (tmp + SP_REGNUM * 4, 4); |
| else |
| (fsr)->regs[i] = tmp + i * 4; |
| } |
| } |
| |
| |
| static void |
| hppa_hpux_som_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| { |
| } |
| |
| static void |
| hppa_hpux_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| { |
| } |
| |
| void |
| _initialize_hppa_hpux_tdep (void) |
| { |
| gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_HPUX_SOM, |
| hppa_hpux_som_init_abi); |
| gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_HPUX_ELF, |
| hppa_hpux_elf_init_abi); |
| } |