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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.
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/* QNX Neutrino specific low level interface, for the remote server
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for GDB.
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Copyright (C) 2009-2019 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 "server.h"
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#include "nto-low.h"
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#include "regdef.h"
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#include "regcache.h"
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#include <x86/context.h>
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#include "common/x86-xstate.h"
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#include "arch/i386.h"
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#include "x86-tdesc.h"
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const unsigned char x86_breakpoint[] = { 0xCC };
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#define x86_breakpoint_len 1
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/* Returns offset in appropriate Neutrino's context structure.
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Defined in x86/context.h.
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GDBREGNO is index into regs_i386 array. It is autogenerated and
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hopefully doesn't change. */
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static int
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nto_x86_register_offset (int gdbregno)
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{
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if (gdbregno >= 0 && gdbregno < 16)
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{
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X86_CPU_REGISTERS *dummy = (void*)0;
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/* GPRs */
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switch (gdbregno)
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{
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case 0:
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return (int)&(dummy->eax);
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case 1:
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return (int)&(dummy->ecx);
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case 2:
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return (int)&(dummy->edx);
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case 3:
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return (int)&(dummy->ebx);
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case 4:
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return (int)&(dummy->esp);
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case 5:
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return (int)&(dummy->ebp);
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case 6:
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return (int)&(dummy->esi);
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case 7:
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return (int)&(dummy->edi);
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case 8:
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return (int)&(dummy->eip);
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case 9:
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return (int)&(dummy->efl);
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case 10:
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return (int)&(dummy->cs);
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case 11:
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return (int)&(dummy->ss);
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#ifdef __SEGMENTS__
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case 12:
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return (int)&(dummy->ds);
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case 13:
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return (int)&(dummy->es);
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case 14:
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return (int)&(dummy->fs);
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case 15:
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return (int)&(dummy->gs);
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#endif
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default:
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return -1;
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}
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}
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return -1;
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}
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static void
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nto_x86_arch_setup (void)
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{
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the_low_target.num_regs = 16;
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struct target_desc *tdesc
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= i386_create_target_description (X86_XSTATE_SSE_MASK, false, false);
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init_target_desc (tdesc, i386_expedite_regs);
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nto_tdesc = tdesc;
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}
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struct nto_target_ops the_low_target =
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{
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nto_x86_arch_setup,
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0, /* num_regs */
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nto_x86_register_offset,
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x86_breakpoint,
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x86_breakpoint_len
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};
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