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345bd07cce
I would like to be able to use non-trivial types in gdbarch_tdep types. This is not possible at the moment (in theory), because of the one definition rule. To allow it, rename all gdbarch_tdep types to <arch>_gdbarch_tdep, and make them inherit from a gdbarch_tdep base class. The inheritance is necessary to be able to pass pointers to all these <arch>_gdbarch_tdep objects to gdbarch_alloc, which takes a pointer to gdbarch_tdep. These objects are never deleted through a base class pointer, so I didn't include a virtual destructor. In the future, if gdbarch objects deletable, I could imagine that the gdbarch_tdep objects could become owned by the gdbarch objects, and then it would become useful to have a virtual destructor (so that the gdbarch object can delete the owned gdbarch_tdep object). But that's not necessary right now. It turns out that RISC-V already has a gdbarch_tdep that is non-default-constructible, so that provides a good motivation for this change. Most changes are fairly straightforward, mostly needing to add some casts all over the place. There is however the xtensa architecture, doing its own little weird thing to define its gdbarch_tdep. I did my best to adapt it, but I can't test those changes. Change-Id: Ic001903f91ddd106bd6ca09a79dabe8df2d69f3b
117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/* Target-dependent code for Solaris x86.
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Copyright (C) 2002-2021 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 "value.h"
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#include "osabi.h"
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#include "sol2-tdep.h"
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#include "i386-tdep.h"
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#include "solib-svr4.h"
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/* From <ia32/sys/reg.h>. */
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static int i386_sol2_gregset_reg_offset[] =
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{
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11 * 4, /* %eax */
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10 * 4, /* %ecx */
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9 * 4, /* %edx */
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8 * 4, /* %ebx */
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17 * 4, /* %esp */
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6 * 4, /* %ebp */
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5 * 4, /* %esi */
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4 * 4, /* %edi */
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14 * 4, /* %eip */
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16 * 4, /* %eflags */
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15 * 4, /* %cs */
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18 * 4, /* %ss */
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3 * 4, /* %ds */
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2 * 4, /* %es */
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1 * 4, /* %fs */
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0 * 4 /* %gs */
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};
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/* Solaris doesn't have a `struct sigcontext', but it does have a
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`mcontext_t' that contains the saved set of machine registers. */
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static CORE_ADDR
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i386_sol2_mcontext_addr (struct frame_info *this_frame)
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{
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CORE_ADDR sp, ucontext_addr;
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sp = get_frame_register_unsigned (this_frame, I386_ESP_REGNUM);
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ucontext_addr = get_frame_memory_unsigned (this_frame, sp + 8, 4);
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return ucontext_addr + 36;
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}
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/* Solaris 2. */
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static void
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i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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i386_gdbarch_tdep *tdep = (i386_gdbarch_tdep *) gdbarch_tdep (gdbarch);
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/* Solaris is SVR4-based. */
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i386_svr4_init_abi (info, gdbarch);
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sol2_init_abi (info, gdbarch);
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/* Solaris reserves space for its FPU emulator in `fpregset_t'.
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There is also some space reserved for the registers of a Weitek
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math coprocessor. */
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tdep->gregset_reg_offset = i386_sol2_gregset_reg_offset;
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tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset);
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tdep->sizeof_gregset = 19 * 4;
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tdep->sizeof_fpregset = 380;
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/* Signal trampolines are slightly different from SVR4. */
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tdep->sigtramp_p = sol2_sigtramp_p;
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tdep->sigcontext_addr = i386_sol2_mcontext_addr;
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tdep->sc_reg_offset = tdep->gregset_reg_offset;
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tdep->sc_num_regs = tdep->gregset_num_regs;
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/* Solaris has 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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}
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static enum gdb_osabi
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i386_sol2_osabi_sniffer (bfd *abfd)
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{
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/* If we have a section named .SUNW_version, then it is almost
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certainly Solaris 2. */
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if (bfd_get_section_by_name (abfd, ".SUNW_version"))
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return GDB_OSABI_SOLARIS;
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return GDB_OSABI_UNKNOWN;
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}
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void _initialize_i386_sol2_tdep ();
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void
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_initialize_i386_sol2_tdep ()
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{
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/* Register an ELF OS ABI sniffer for Solaris 2 binaries. */
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gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
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i386_sol2_osabi_sniffer);
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gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS,
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i386_sol2_init_abi);
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}
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