mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
1163a4b7a3
As on amd64, these registers hold the base address of the fs and gs segments, respectively. For i386 these two registers are 32 bits. gdb/ChangeLog: * amd64-fbsd-nat.c (amd64_fbsd_nat_target::read_description): Update calls to i386_target_description to add 'segments' parameter. * amd64-tdep.c (amd64_init_abi): Set tdep->fsbase_regnum. Don't add segment base registers. * arch/i386.c (i386_create_target_description): Add 'segments' parameter to enable segment base registers. * arch/i386.h (i386_create_target_description): Likewise. * features/i386/32bit-segments.xml: New file. * features/i386/32bit-segments.c: Generate. * i386-fbsd-nat.c (i386_fbsd_nat_target::read_description): Update call to i386_target_description to add 'segments' parameter. * i386-fbsd-tdep.c (i386fbsd_core_read_description): Likewise. * i386-go32-tdep.c (i386_go32_init_abi): Likewise. * i386-linux-tdep.c (i386_linux_read_description): Likewise. * i386-tdep.c (i386_validate_tdesc_p): Add segment base registers if feature is present. (i386_gdbarch_init): Pass I386_NUM_REGS to set_gdbarch_num_regs. Add 'segments' parameter to call to i386_target_description. (i386_target_description): Add 'segments' parameter to enable segment base registers. (_initialize_i386_tdep) [GDB_SELF_TEST]: Add 'segments' parameter to call to i386_target_description. * i386-tdep.h (struct gdbarch_tdep): Add 'fsbase_regnum'. (enum i386_regnum): Add I386_FSBASE_REGNUM and I386_GSBASE_REGNUM. Define I386_NUM_REGS. (i386_target_description): Add 'segments' parameter to enable segment base registers. gdb/gdbserver/ChangeLog: * linux-x86-tdesc.c (i386_linux_read_description): Update call to i386_create_target_description for 'segments' parameter. * lynx-i386-low.c (lynx_i386_arch_setup): Likewise. * nto-x86-low.c (nto_x86_arch_setup): Likewise. * win32-i386-low.c (i386_arch_setup): Likewise.
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/* Target-dependent code for DJGPP/i386.
|
||
|
||
Copyright (C) 1988-2019 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 3 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, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "defs.h"
|
||
#include "i386-tdep.h"
|
||
#include "common/x86-xstate.h"
|
||
#include "target-descriptions.h"
|
||
#include "osabi.h"
|
||
|
||
static void
|
||
i386_go32_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
/* DJGPP doesn't have any special frames for signal handlers. */
|
||
tdep->sigtramp_p = NULL;
|
||
|
||
tdep->jb_pc_offset = 36;
|
||
|
||
/* DJGPP does not support the SSE registers. */
|
||
if (!tdesc_has_registers (info.target_desc))
|
||
tdep->tdesc = i386_target_description (X86_XSTATE_X87_MASK, false);
|
||
|
||
/* Native compiler is GCC, which uses the SVR4 register numbering
|
||
even in COFF and STABS. See the comment in i386_gdbarch_init,
|
||
before the calls to set_gdbarch_stab_reg_to_regnum and
|
||
set_gdbarch_sdb_reg_to_regnum. */
|
||
set_gdbarch_stab_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum);
|
||
set_gdbarch_sdb_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum);
|
||
|
||
set_gdbarch_has_dos_based_file_system (gdbarch, 1);
|
||
|
||
set_gdbarch_wchar_bit (gdbarch, 16);
|
||
set_gdbarch_wchar_signed (gdbarch, 0);
|
||
}
|
||
|
||
|
||
static enum gdb_osabi
|
||
i386_coff_osabi_sniffer (bfd *abfd)
|
||
{
|
||
if (strcmp (bfd_get_target (abfd), "coff-go32-exe") == 0
|
||
|| strcmp (bfd_get_target (abfd), "coff-go32") == 0)
|
||
return GDB_OSABI_GO32;
|
||
|
||
return GDB_OSABI_UNKNOWN;
|
||
}
|
||
|
||
|
||
void
|
||
_initialize_i386_go32_tdep ()
|
||
{
|
||
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
|
||
i386_coff_osabi_sniffer);
|
||
|
||
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_GO32,
|
||
i386_go32_init_abi);
|
||
}
|