a80b95ba67
2008-11-27 Tristan Gingold <gingold@adacore.com> * NEWS: Add entry for new native configuration: Darwin. * configure.host: Add Darwin host. * configure.tgt: Add Darwin target. * defs.h (enum gdb_osabi): Add GDB_OSABI_DARWIN. * osabi.c (gdb_osabi_names): Add name for Darwin abi. * i386-darwin-nat.c: New file. * i386-darwin-tdep.c: New file. * machoread.c: New file. * darwin-nat-info.c: New file. * darwin-nat.c: New file. * darwin-nat.h: New file. * darwin.defs: New file. * config/i386/darwin.mh: New file. gdb/doc: 2008-11-27 Tristan Gingold <gingold@adacore.com> * gdb.texinfo (Darwin): Document Darwin specific features.
493 lines
14 KiB
C
493 lines
14 KiB
C
/* Darwin support for GDB, the GNU debugger.
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Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2008
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Free Software Foundation, Inc.
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Contributed by Apple Computer, 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 "frame.h"
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#include "inferior.h"
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#include "target.h"
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#include "symfile.h"
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#include "symtab.h"
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#include "objfiles.h"
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#include "gdbcmd.h"
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#include "regcache.h"
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#include "gdb_assert.h"
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#include "i386-tdep.h"
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#include "amd64-nat.h"
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#include "i387-tdep.h"
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#include "gdbarch.h"
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#include "arch-utils.h"
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#include "darwin-nat.h"
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#include "i386-darwin-tdep.h"
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/* Read register values from the inferior process.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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static void
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i386_darwin_fetch_inferior_registers (struct regcache *regcache, int regno)
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{
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thread_t current_thread = ptid_get_tid (inferior_ptid);
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int fetched = 0;
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struct gdbarch *gdbarch = get_regcache_arch (regcache);
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if (gdbarch_ptr_bit (gdbarch) == 64)
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{
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if (regno == -1 || amd64_native_gregset_supplies_p (gdbarch, regno))
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{
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x86_thread_state_t gp_regs;
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unsigned int gp_count = x86_THREAD_STATE_COUNT;
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kern_return_t ret;
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ret = thread_get_state
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(current_thread, x86_THREAD_STATE, (thread_state_t) & gp_regs,
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&gp_count);
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if (ret != KERN_SUCCESS)
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{
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printf_unfiltered (_("Error calling thread_get_state for GP registers for thread 0x%ulx"), current_thread);
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MACH_CHECK_ERROR (ret);
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}
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amd64_supply_native_gregset (regcache, &gp_regs.uts, -1);
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fetched++;
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}
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if (regno == -1 || !amd64_native_gregset_supplies_p (gdbarch, regno))
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{
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x86_float_state_t fp_regs;
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unsigned int fp_count = x86_FLOAT_STATE_COUNT;
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kern_return_t ret;
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ret = thread_get_state
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(current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
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&fp_count);
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if (ret != KERN_SUCCESS)
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{
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printf_unfiltered (_("Error calling thread_get_state for float registers for thread 0x%ulx"), current_thread);
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MACH_CHECK_ERROR (ret);
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}
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i387_supply_fxsave (regcache, -1, &fp_regs.ufs.fs64);
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fetched++;
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}
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}
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else
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{
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if (regno == -1 || regno < I386_NUM_GREGS)
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{
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i386_thread_state_t gp_regs;
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unsigned int gp_count = i386_THREAD_STATE_COUNT;
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kern_return_t ret;
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int i;
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ret = thread_get_state
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(current_thread, i386_THREAD_STATE, (thread_state_t) & gp_regs,
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&gp_count);
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if (ret != KERN_SUCCESS)
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{
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printf_unfiltered (_("Error calling thread_get_state for GP registers for thread 0x%ulx"), current_thread);
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MACH_CHECK_ERROR (ret);
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}
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for (i = 0; i < I386_NUM_GREGS; i++)
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regcache_raw_supply
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(regcache, i,
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(char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);
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fetched++;
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}
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if (regno == -1
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|| (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
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{
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i386_float_state_t fp_regs;
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unsigned int fp_count = i386_FLOAT_STATE_COUNT;
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kern_return_t ret;
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ret = thread_get_state
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(current_thread, i386_FLOAT_STATE, (thread_state_t) & fp_regs,
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&fp_count);
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if (ret != KERN_SUCCESS)
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{
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printf_unfiltered (_("Error calling thread_get_state for float registers for thread 0x%ulx"), current_thread);
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MACH_CHECK_ERROR (ret);
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}
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i387_supply_fxsave (regcache, -1, &fp_regs.__fpu_fcw);
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fetched++;
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}
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}
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if (! fetched)
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{
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warning (_("unknown register %d"), regno);
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regcache_raw_supply (regcache, regno, NULL);
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}
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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static void
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i386_darwin_store_inferior_registers (struct regcache *regcache, int regno)
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{
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thread_t current_thread = ptid_get_tid (inferior_ptid);
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struct gdbarch *gdbarch = get_regcache_arch (regcache);
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if (gdbarch_ptr_bit (gdbarch) == 64)
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{
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if (regno == -1 || amd64_native_gregset_supplies_p (gdbarch, regno))
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{
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x86_thread_state_t gp_regs;
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kern_return_t ret;
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unsigned int gp_count = x86_THREAD_STATE_COUNT;
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ret = thread_get_state
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(current_thread, x86_THREAD_STATE, (thread_state_t) &gp_regs,
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&gp_count);
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MACH_CHECK_ERROR (ret);
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gdb_assert (gp_regs.tsh.flavor == x86_THREAD_STATE64);
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gdb_assert (gp_regs.tsh.count == x86_THREAD_STATE64_COUNT);
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amd64_collect_native_gregset (regcache, &gp_regs.uts, regno);
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ret = thread_set_state (current_thread, x86_THREAD_STATE,
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(thread_state_t) &gp_regs,
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x86_THREAD_STATE_COUNT);
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MACH_CHECK_ERROR (ret);
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}
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if (regno == -1 || !amd64_native_gregset_supplies_p (gdbarch, regno))
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{
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x86_float_state_t fp_regs;
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kern_return_t ret;
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unsigned int fp_count = x86_FLOAT_STATE_COUNT;
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ret = thread_get_state
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(current_thread, x86_FLOAT_STATE, (thread_state_t) & fp_regs,
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&fp_count);
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MACH_CHECK_ERROR (ret);
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gdb_assert (fp_regs.fsh.flavor == x86_FLOAT_STATE64);
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gdb_assert (fp_regs.fsh.count == x86_FLOAT_STATE64_COUNT);
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i387_collect_fxsave (regcache, regno, &fp_regs.ufs.fs64.__fpu_fcw);
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ret = thread_set_state (current_thread, x86_FLOAT_STATE,
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(thread_state_t) & fp_regs,
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x86_FLOAT_STATE_COUNT);
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MACH_CHECK_ERROR (ret);
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}
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}
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else
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{
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if (regno == -1 || regno < I386_NUM_GREGS)
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{
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i386_thread_state_t gp_regs;
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kern_return_t ret;
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unsigned int gp_count = i386_THREAD_STATE_COUNT;
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int i;
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ret = thread_get_state
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(current_thread, i386_THREAD_STATE, (thread_state_t) & gp_regs,
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&gp_count);
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MACH_CHECK_ERROR (ret);
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for (i = 0; i < I386_NUM_GREGS; i++)
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if (regno == -1 || regno == i)
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regcache_raw_collect
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(regcache, i,
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(char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);
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ret = thread_set_state (current_thread, i386_THREAD_STATE,
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(thread_state_t) & gp_regs,
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i386_THREAD_STATE_COUNT);
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MACH_CHECK_ERROR (ret);
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}
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if (regno == -1
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|| (regno >= I386_ST0_REGNUM && regno < I386_SSE_NUM_REGS))
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{
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i386_float_state_t fp_regs;
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unsigned int fp_count = i386_FLOAT_STATE_COUNT;
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kern_return_t ret;
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ret = thread_get_state
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(current_thread, i386_FLOAT_STATE, (thread_state_t) & fp_regs,
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&fp_count);
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MACH_CHECK_ERROR (ret);
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i387_collect_fxsave (regcache, regno, &fp_regs.__fpu_fcw);
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ret = thread_set_state (current_thread, i386_FLOAT_STATE,
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(thread_state_t) & fp_regs,
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i386_FLOAT_STATE_COUNT);
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MACH_CHECK_ERROR (ret);
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}
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}
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}
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/* Support for debug registers, boosted mostly from i386-linux-nat.c. */
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#ifndef DR_FIRSTADDR
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#define DR_FIRSTADDR 0
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#endif
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#ifndef DR_LASTADDR
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#define DR_LASTADDR 3
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#endif
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#ifndef DR_STATUS
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#define DR_STATUS 6
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#endif
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#ifndef DR_CONTROL
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#define DR_CONTROL 7
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#endif
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static void
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i386_darwin_dr_set (int regnum, uint32_t value)
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{
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int current_pid;
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thread_t current_thread;
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x86_debug_state_t dr_regs;
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kern_return_t ret;
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unsigned int dr_count = x86_DEBUG_STATE_COUNT;
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gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);
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current_thread = ptid_get_tid (inferior_ptid);
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dr_regs.dsh.flavor = x86_DEBUG_STATE32;
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dr_regs.dsh.count = x86_DEBUG_STATE32_COUNT;
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dr_count = x86_DEBUG_STATE_COUNT;
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ret = thread_get_state (current_thread, x86_DEBUG_STATE,
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(thread_state_t) &dr_regs, &dr_count);
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if (ret != KERN_SUCCESS)
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{
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printf_unfiltered (_("Error reading debug registers thread 0x%x via thread_get_state\n"), (int) current_thread);
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MACH_CHECK_ERROR (ret);
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}
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switch (regnum)
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{
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case 0:
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dr_regs.uds.ds32.__dr0 = value;
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break;
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case 1:
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dr_regs.uds.ds32.__dr1 = value;
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break;
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case 2:
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dr_regs.uds.ds32.__dr2 = value;
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break;
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case 3:
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dr_regs.uds.ds32.__dr3 = value;
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break;
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case 4:
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dr_regs.uds.ds32.__dr4 = value;
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break;
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case 5:
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dr_regs.uds.ds32.__dr5 = value;
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break;
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case 6:
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dr_regs.uds.ds32.__dr6 = value;
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break;
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case 7:
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dr_regs.uds.ds32.__dr7 = value;
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break;
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}
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ret = thread_set_state (current_thread, x86_DEBUG_STATE,
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(thread_state_t) &dr_regs, dr_count);
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if (ret != KERN_SUCCESS)
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{
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printf_unfiltered (_("Error writing debug registers thread 0x%x via thread_get_state\n"), (int) current_thread);
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MACH_CHECK_ERROR (ret);
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}
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}
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static uint32_t
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i386_darwin_dr_get (int regnum)
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{
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thread_t current_thread;
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x86_debug_state_t dr_regs;
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kern_return_t ret;
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unsigned int dr_count = x86_DEBUG_STATE_COUNT;
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gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);
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current_thread = ptid_get_tid (inferior_ptid);
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dr_regs.dsh.flavor = x86_DEBUG_STATE32;
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dr_regs.dsh.count = x86_DEBUG_STATE32_COUNT;
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dr_count = x86_DEBUG_STATE_COUNT;
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ret = thread_get_state (current_thread, x86_DEBUG_STATE,
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(thread_state_t) &dr_regs, &dr_count);
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if (ret != KERN_SUCCESS)
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{
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printf_unfiltered (_("Error reading debug registers thread 0x%x via thread_get_state\n"), (int) current_thread);
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MACH_CHECK_ERROR (ret);
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}
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switch (regnum)
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{
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case 0:
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return dr_regs.uds.ds32.__dr0;
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case 1:
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return dr_regs.uds.ds32.__dr1;
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case 2:
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return dr_regs.uds.ds32.__dr2;
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case 3:
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return dr_regs.uds.ds32.__dr3;
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case 4:
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return dr_regs.uds.ds32.__dr4;
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case 5:
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return dr_regs.uds.ds32.__dr5;
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case 6:
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return dr_regs.uds.ds32.__dr6;
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case 7:
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return dr_regs.uds.ds32.__dr7;
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default:
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return -1;
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}
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}
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void
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i386_darwin_dr_set_control (unsigned long control)
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{
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i386_darwin_dr_set (DR_CONTROL, control);
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}
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void
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i386_darwin_dr_set_addr (int regnum, CORE_ADDR addr)
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{
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gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
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i386_darwin_dr_set (DR_FIRSTADDR + regnum, addr);
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}
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void
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i386_darwin_dr_reset_addr (int regnum)
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{
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gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
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i386_darwin_dr_set (DR_FIRSTADDR + regnum, 0L);
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}
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unsigned long
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i386_darwin_dr_get_status (void)
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{
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return i386_darwin_dr_get (DR_STATUS);
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}
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void
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darwin_check_osabi (darwin_inferior *inf, thread_t thread)
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{
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if (gdbarch_osabi (current_gdbarch) == GDB_OSABI_UNKNOWN)
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{
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/* Attaching to a process. Let's figure out what kind it is. */
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x86_thread_state_t gp_regs;
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struct gdbarch_info info;
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unsigned int gp_count = x86_THREAD_STATE_COUNT;
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kern_return_t ret;
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ret = thread_get_state (thread, x86_THREAD_STATE,
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(thread_state_t) &gp_regs, &gp_count);
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if (ret != KERN_SUCCESS)
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{
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MACH_CHECK_ERROR (ret);
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return;
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}
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gdbarch_info_init (&info);
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gdbarch_info_fill (&info);
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info.byte_order = gdbarch_byte_order (current_gdbarch);
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info.osabi = GDB_OSABI_DARWIN;
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if (gp_regs.tsh.flavor == x86_THREAD_STATE64)
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info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
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bfd_mach_x86_64);
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else
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info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
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bfd_mach_i386_i386);
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gdbarch_update_p (info);
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}
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}
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#define X86_EFLAGS_T 0x100UL
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void
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darwin_set_sstep (thread_t thread, int enable)
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{
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x86_thread_state_t regs;
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unsigned int count = x86_THREAD_STATE_COUNT;
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kern_return_t kret;
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kret = thread_get_state (thread, x86_THREAD_STATE,
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(thread_state_t) ®s, &count);
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if (kret != KERN_SUCCESS)
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{
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printf_unfiltered (_("darwin_set_sstep: error %x, thread=%x\n"),
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kret, thread);
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return;
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}
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switch (regs.tsh.flavor)
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{
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case x86_THREAD_STATE32:
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{
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__uint32_t bit = enable ? X86_EFLAGS_T : 0;
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if ((regs.uts.ts32.__eflags & X86_EFLAGS_T) == bit)
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return;
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regs.uts.ts32.__eflags = (regs.uts.ts32.__eflags & ~X86_EFLAGS_T) | bit;
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kret = thread_set_state (thread, x86_THREAD_STATE,
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(thread_state_t) ®s, count);
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MACH_CHECK_ERROR (kret);
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}
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break;
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case x86_THREAD_STATE64:
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{
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__uint64_t bit = enable ? X86_EFLAGS_T : 0;
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if ((regs.uts.ts64.__rflags & X86_EFLAGS_T) == bit)
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return;
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regs.uts.ts64.__rflags = (regs.uts.ts64.__rflags & ~X86_EFLAGS_T) | bit;
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kret = thread_set_state (thread, x86_THREAD_STATE,
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(thread_state_t) ®s, count);
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MACH_CHECK_ERROR (kret);
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}
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break;
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default:
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error (_("darwin_set_sstep: unknown flavour: %d\n"), regs.tsh.flavor);
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}
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}
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void
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darwin_complete_target (struct target_ops *target)
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{
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amd64_native_gregset64_reg_offset = amd64_darwin_thread_state_reg_offset;
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amd64_native_gregset64_num_regs = amd64_darwin_thread_state_num_regs;
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amd64_native_gregset32_reg_offset = i386_darwin_thread_state_reg_offset;
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amd64_native_gregset32_num_regs = i386_darwin_thread_state_num_regs;
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target->to_fetch_registers = i386_darwin_fetch_inferior_registers;
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target->to_store_registers = i386_darwin_store_inferior_registers;
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}
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