176 lines
6 KiB
C
176 lines
6 KiB
C
/* Target-dependent code for HPUX running on PA-RISC, for GDB.
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Copyright 2002, 2003 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "arch-utils.h"
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#include "gdbcore.h"
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#include "osabi.h"
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#include "gdb_string.h"
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#include "frame.h"
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/* Forward declarations. */
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extern void _initialize_hppa_hpux_tdep (void);
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extern initialize_file_ftype _initialize_hppa_hpux_tdep;
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/* FIXME: brobecker 2002-12-25. The following functions will eventually
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become static, after the multiarching conversion is done. */
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int hppa_hpux_pc_in_sigtramp (CORE_ADDR pc, char *name);
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void hppa32_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi,
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CORE_ADDR *tmp);
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void hppa32_hpux_frame_base_before_sigtramp (struct frame_info *fi,
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CORE_ADDR *tmp);
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void hppa32_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi,
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CORE_ADDR *fsr);
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void hppa64_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi,
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CORE_ADDR *tmp);
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void hppa64_hpux_frame_base_before_sigtramp (struct frame_info *fi,
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CORE_ADDR *tmp);
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void hppa64_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi,
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CORE_ADDR *fsr);
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int
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hppa_hpux_pc_in_sigtramp (CORE_ADDR pc, char *name)
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{
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/* Actually, for a PA running HPUX the kernel calls the signal handler
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without an intermediate trampoline. Luckily the kernel always sets
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the return pointer for the signal handler to point to _sigreturn. */
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return (name && (strcmp ("_sigreturn", name) == 0));
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}
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/* For hppa32_hpux_frame_saved_pc_in_sigtramp,
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hppa32_hpux_frame_base_before_sigtramp and
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hppa32_hpux_frame_find_saved_regs_in_sigtramp:
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The signal context structure pointer is always saved at the base
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of the frame which "calls" the signal handler. We only want to find
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the hardware save state structure, which lives 10 32bit words into
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sigcontext structure.
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Within the hardware save state structure, registers are found in the
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same order as the register numbers in GDB.
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At one time we peeked at %r31 rather than the PC queues to determine
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what instruction took the fault. This was done on purpose, but I don't
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remember why. Looking at the PC queues is really the right way, and
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I don't remember why that didn't work when this code was originally
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written. */
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void
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hppa32_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi, CORE_ADDR *tmp)
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{
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*tmp = read_memory_integer (get_frame_base (fi) + (43 * 4), 4);
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}
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void
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hppa32_hpux_frame_base_before_sigtramp (struct frame_info *fi,
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CORE_ADDR *tmp)
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{
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*tmp = read_memory_integer (get_frame_base (fi) + (40 * 4), 4);
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}
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void
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hppa32_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi,
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CORE_ADDR *fsr)
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{
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int i;
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const CORE_ADDR tmp = get_frame_base (fi) + (10 * 4);
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for (i = 0; i < NUM_REGS; i++)
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{
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if (i == SP_REGNUM)
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fsr[SP_REGNUM] = read_memory_integer (tmp + SP_REGNUM * 4, 4);
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else
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fsr[i] = tmp + i * 4;
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}
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}
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/* For hppa64_hpux_frame_saved_pc_in_sigtramp,
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hppa64_hpux_frame_base_before_sigtramp and
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hppa64_hpux_frame_find_saved_regs_in_sigtramp:
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These functions are the PA64 ABI equivalents of the 32bits counterparts
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above. See the comments there.
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For PA64, the save_state structure is at an offset of 24 32-bit words
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from the sigcontext structure. The 64 bit general registers are at an
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offset of 640 bytes from the beginning of the save_state structure,
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and the floating pointer register are at an offset of 256 bytes from
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the beginning of the save_state structure. */
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void
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hppa64_hpux_frame_saved_pc_in_sigtramp (struct frame_info *fi, CORE_ADDR *tmp)
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{
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*tmp = read_memory_integer
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(get_frame_base (fi) + (24 * 4) + 640 + (33 * 8), 8);
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}
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void
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hppa64_hpux_frame_base_before_sigtramp (struct frame_info *fi,
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CORE_ADDR *tmp)
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{
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*tmp = read_memory_integer
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(get_frame_base (fi) + (24 * 4) + 640 + (30 * 8), 8);
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}
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void
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hppa64_hpux_frame_find_saved_regs_in_sigtramp (struct frame_info *fi,
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CORE_ADDR *fsr)
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{
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int i;
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const CORE_ADDR tmp1 = get_frame_base (fi) + (24 * 4) + 640;
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const CORE_ADDR tmp2 = get_frame_base (fi) + (24 * 4) + 256;
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for (i = 0; i < NUM_REGS; i++)
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{
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if (i == SP_REGNUM)
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fsr[SP_REGNUM] = read_memory_integer (tmp1 + SP_REGNUM * 8, 8);
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else if (i >= FP0_REGNUM)
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fsr[i] = tmp2 + (i - FP0_REGNUM) * 8;
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else
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fsr[i] = tmp1 + i * 8;
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}
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}
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static void
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hppa_hpux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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set_gdbarch_pc_in_sigtramp (gdbarch, hppa_hpux_pc_in_sigtramp);
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}
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static void
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hppa_hpux_som_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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hppa_hpux_init_abi (info, gdbarch);
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}
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static void
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hppa_hpux_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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hppa_hpux_init_abi (info, gdbarch);
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}
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void
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_initialize_hppa_hpux_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_HPUX_SOM,
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hppa_hpux_som_init_abi);
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gdbarch_register_osabi (bfd_arch_hppa, bfd_mach_hppa20w, GDB_OSABI_HPUX_ELF,
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hppa_hpux_elf_init_abi);
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}
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