1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
/* Target-dependent code for HP PA-RISC BSD's.
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Copyright (C) 2004-2024 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 3 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, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "objfiles.h"
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#include "target.h"
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#include "value.h"
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#include "elf/common.h"
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#include "hppa-tdep.h"
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#include "hppa-bsd-tdep.h"
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#include "dwarf2/frame.h"
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#include "solib-svr4.h"
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static CORE_ADDR
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hppabsd_find_global_pointer (struct gdbarch *gdbarch, struct value *function)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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CORE_ADDR faddr = value_as_address (function);
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struct obj_section *faddr_sec;
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/* Is this a plabel? If so, dereference it to get the Global Pointer
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value. */
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if (faddr & 2)
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{
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gdb_byte buf[4];
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if (target_read_memory ((faddr & ~3) + 4, buf, sizeof buf) == 0)
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return extract_unsigned_integer (buf, sizeof buf, byte_order);
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}
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/* If the address is in the .plt section, then the real function
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hasn't yet been fixed up by the linker so we cannot determine the
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Global Pointer for that function. */
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if (in_plt_section (faddr))
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return 0;
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faddr_sec = find_pc_section (faddr);
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if (faddr_sec != NULL)
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{
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for (struct obj_section *sec : faddr_sec->objfile->sections ())
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{
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if (strcmp (sec->the_bfd_section->name, ".dynamic") == 0)
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{
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CORE_ADDR addr = sec->addr ();
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CORE_ADDR endaddr = sec->endaddr ();
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while (addr < endaddr)
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{
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gdb_byte buf[4];
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LONGEST tag;
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if (target_read_memory (addr, buf, sizeof buf) != 0)
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break;
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tag = extract_signed_integer (buf, byte_order);
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if (tag == DT_PLTGOT)
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{
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CORE_ADDR pltgot;
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if (target_read_memory (addr + 4, buf, sizeof buf) != 0)
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break;
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/* The NetBSD/OpenBSD ld.so doesn't relocate
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DT_PLTGOT, so we have to do it ourselves. */
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pltgot = extract_unsigned_integer (buf, sizeof buf,
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byte_order);
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pltgot += sec->objfile->text_section_offset ();
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return pltgot;
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}
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if (tag == DT_NULL)
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break;
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addr += 8;
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}
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break;
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}
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}
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}
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return 0;
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}
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static void
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hppabsd_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
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struct dwarf2_frame_state_reg *reg,
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frame_info_ptr this_frame)
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{
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if (regnum == HPPA_PCOQ_HEAD_REGNUM)
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reg->how = DWARF2_FRAME_REG_RA;
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else if (regnum == HPPA_SP_REGNUM)
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reg->how = DWARF2_FRAME_REG_CFA;
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}
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void
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hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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hppa_gdbarch_tdep *tdep = gdbarch_tdep<hppa_gdbarch_tdep> (gdbarch);
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/* OpenBSD and NetBSD have a 64-bit 'long double'. */
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set_gdbarch_long_double_bit (gdbarch, 64);
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set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
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/* OpenBSD and NetBSD use ELF. */
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tdep->is_elf = 1;
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tdep->find_global_pointer = hppabsd_find_global_pointer;
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tdep->in_solib_call_trampoline = hppa_in_solib_call_trampoline;
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set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code);
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/* OpenBSD and NetBSD use SVR4-style shared libraries. */
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set_solib_svr4_fetch_link_map_offsets
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(gdbarch, svr4_ilp32_fetch_link_map_offsets);
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/* Hook in the DWARF CFI frame unwinder. */
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dwarf2_frame_set_init_reg (gdbarch, hppabsd_dwarf2_frame_init_reg);
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dwarf2_append_unwinders (gdbarch);
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}
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