df7e526582
This commit renames nine files that contain code used by both 32- and 64-bit Intel ports such that their names are prefixed with "x86" rather than "i386". All types, functions and variables within these files are likewise renamed such that their names are prefixed with "x86" rather than "i386". This makes GDB follow the convention used by gdbserver such that 32-bit Intel code lives in files called "i386-*", 64-bit Intel code lives in files called "amd64-*", and code for both 32- and 64-bit Intel lives in files called "x86-*". This commit only renames OS-independent files. The Linux ports of both GDB and gdbserver now follow the i386/amd64/x86 convention fully. Some ports still use the old convention where "i386" in file/function/ type/variable names can mean "32-bit only" or "32- and 64-bit" but I don't want to touch ports I can't fully test except where absolutely necessary. gdb/ChangeLog: * i386-nat.h: Renamed as... * x86-nat.h: New file. All type, function and variable name prefixes changed from "i386_" to "x86_". All references updated. * i386-nat.c: Renamed as... * x86-nat.c: New file. All type, function and variable name prefixes changed from "i386_" to "x86_". All references updated. * common/i386-xstate.h: Renamed as... * common/x86-xstate.h: New file. All type, function and variable name prefixes changed from "i386_" to "x86_". All references updated. * nat/i386-cpuid.h: Renamed as... * nat/x86-cpuid.h: New file. All type, function and variable name prefixes changed from "i386_" to "x86_". All references updated. * nat/i386-gcc-cpuid.h: Renamed as... * nat/x86-gcc-cpuid.h: New file. All type, function and variable name prefixes changed from "i386_" to "x86_". All references updated. * nat/i386-dregs.h: Renamed as... * nat/x86-dregs.h: New file. All type, function and variable name prefixes changed from "i386_" to "x86_". All references updated. * nat/i386-dregs.c: Renamed as... * nat/x86-dregs.c: New file. All type, function and variable name prefixes changed from "i386_" to "x86_". All references updated. gdb/gdbserver/ChangeLog: * i386-low.h: Renamed as... * x86-low.h: New file. All type, function and variable name prefixes changed from "i386_" to "x86_". All references updated. * i386-low.c: Renamed as... * x86-low.c: New file. All type, function and variable name prefixes changed from "i386_" to "x86_". All references updated.
648 lines
17 KiB
C
648 lines
17 KiB
C
/* Darwin support for GDB, the GNU debugger.
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Copyright (C) 1997-2014 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 "i386-tdep.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 "gdbcore.h"
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#include "x86-nat.h"
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#include "darwin-nat.h"
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#include "i386-darwin-tdep.h"
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#ifdef BFD64
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#include "amd64-nat.h"
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#include "amd64-tdep.h"
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#include "amd64-darwin-tdep.h"
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#endif
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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 target_ops *ops,
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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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#ifdef BFD64
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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 "
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"GP registers for thread 0x%lx\n"),
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(unsigned long) 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 "
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"float registers for thread 0x%lx\n"),
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(unsigned long) current_thread);
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MACH_CHECK_ERROR (ret);
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}
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amd64_supply_fxsave (regcache, -1, &fp_regs.ufs.fs64.__fpu_fcw);
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fetched++;
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}
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}
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else
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#endif
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{
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if (regno == -1 || regno < I386_NUM_GREGS)
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{
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x86_thread_state32_t gp_regs;
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unsigned int gp_count = x86_THREAD_STATE32_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, x86_THREAD_STATE32, (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 "
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"GP registers for thread 0x%lx\n"),
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(unsigned long) 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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x86_float_state32_t fp_regs;
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unsigned int fp_count = x86_FLOAT_STATE32_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_STATE32, (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 "
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"float registers for thread 0x%lx\n"),
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(unsigned long) 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 target_ops *ops,
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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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#ifdef BFD64
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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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amd64_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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#endif
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{
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if (regno == -1 || regno < I386_NUM_GREGS)
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{
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x86_thread_state32_t gp_regs;
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kern_return_t ret;
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unsigned int gp_count = x86_THREAD_STATE32_COUNT;
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int i;
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ret = thread_get_state
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(current_thread, x86_THREAD_STATE32, (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, x86_THREAD_STATE32,
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(thread_state_t) &gp_regs,
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x86_THREAD_STATE32_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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x86_float_state32_t fp_regs;
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unsigned int fp_count = x86_FLOAT_STATE32_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_STATE32, (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, x86_FLOAT_STATE32,
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(thread_state_t) &fp_regs,
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x86_FLOAT_STATE32_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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static void
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i386_darwin_dr_set (int regnum, CORE_ADDR 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;
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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_STATE;
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dr_regs.dsh.count = x86_DEBUG_STATE_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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MACH_CHECK_ERROR (ret);
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switch (dr_regs.dsh.flavor)
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{
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case x86_DEBUG_STATE32:
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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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break;
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#ifdef BFD64
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case x86_DEBUG_STATE64:
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switch (regnum)
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{
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case 0:
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dr_regs.uds.ds64.__dr0 = value;
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break;
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case 1:
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dr_regs.uds.ds64.__dr1 = value;
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break;
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case 2:
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dr_regs.uds.ds64.__dr2 = value;
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break;
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case 3:
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dr_regs.uds.ds64.__dr3 = value;
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break;
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case 4:
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dr_regs.uds.ds64.__dr4 = value;
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break;
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case 5:
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dr_regs.uds.ds64.__dr5 = value;
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break;
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case 6:
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dr_regs.uds.ds64.__dr6 = value;
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break;
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case 7:
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dr_regs.uds.ds64.__dr7 = value;
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break;
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}
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break;
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#endif
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}
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ret = thread_set_state (current_thread, dr_regs.dsh.flavor,
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(thread_state_t) &dr_regs.uds, dr_count);
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MACH_CHECK_ERROR (ret);
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}
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static CORE_ADDR
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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;
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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_STATE;
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dr_regs.dsh.count = x86_DEBUG_STATE_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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MACH_CHECK_ERROR (ret);
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switch (dr_regs.dsh.flavor)
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{
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case x86_DEBUG_STATE32:
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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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break;
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#ifdef BFD64
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case x86_DEBUG_STATE64:
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switch (regnum)
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{
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case 0:
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return dr_regs.uds.ds64.__dr0;
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case 1:
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return dr_regs.uds.ds64.__dr1;
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case 2:
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return dr_regs.uds.ds64.__dr2;
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case 3:
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return dr_regs.uds.ds64.__dr3;
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case 4:
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return dr_regs.uds.ds64.__dr4;
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case 5:
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return dr_regs.uds.ds64.__dr5;
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case 6:
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return dr_regs.uds.ds64.__dr6;
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case 7:
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return dr_regs.uds.ds64.__dr7;
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default:
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return -1;
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}
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break;
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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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static 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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static 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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static CORE_ADDR
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i386_darwin_dr_get_addr (int regnum)
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{
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return i386_darwin_dr_get (regnum);
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}
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static 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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static unsigned long
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i386_darwin_dr_get_control (void)
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{
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return i386_darwin_dr_get (DR_CONTROL);
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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 (target_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,
|
|
(thread_state_t) &gp_regs, &gp_count);
|
|
if (ret != KERN_SUCCESS)
|
|
{
|
|
MACH_CHECK_ERROR (ret);
|
|
return;
|
|
}
|
|
|
|
gdbarch_info_init (&info);
|
|
gdbarch_info_fill (&info);
|
|
info.byte_order = gdbarch_byte_order (target_gdbarch ());
|
|
info.osabi = GDB_OSABI_DARWIN;
|
|
if (gp_regs.tsh.flavor == x86_THREAD_STATE64)
|
|
info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
|
|
bfd_mach_x86_64);
|
|
else
|
|
info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
|
|
bfd_mach_i386_i386);
|
|
gdbarch_update_p (info);
|
|
}
|
|
}
|
|
|
|
#define X86_EFLAGS_T 0x100UL
|
|
|
|
/* Returning from a signal trampoline is done by calling a
|
|
special system call (sigreturn). This system call
|
|
restores the registers that were saved when the signal was
|
|
raised, including %eflags/%rflags. That means that single-stepping
|
|
won't work. Instead, we'll have to modify the signal context
|
|
that's about to be restored, and set the trace flag there. */
|
|
|
|
static int
|
|
i386_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
|
|
static const gdb_byte darwin_syscall[] = { 0xcd, 0x80 }; /* int 0x80 */
|
|
gdb_byte buf[sizeof (darwin_syscall)];
|
|
|
|
/* Check if PC is at a sigreturn system call. */
|
|
if (target_read_memory (regs->uts.ts32.__eip, buf, sizeof (buf)) == 0
|
|
&& memcmp (buf, darwin_syscall, sizeof (darwin_syscall)) == 0
|
|
&& regs->uts.ts32.__eax == 0xb8 /* SYS_sigreturn */)
|
|
{
|
|
ULONGEST uctx_addr;
|
|
ULONGEST mctx_addr;
|
|
ULONGEST flags_addr;
|
|
unsigned int eflags;
|
|
|
|
uctx_addr = read_memory_unsigned_integer
|
|
(regs->uts.ts32.__esp + 4, 4, byte_order);
|
|
mctx_addr = read_memory_unsigned_integer
|
|
(uctx_addr + 28, 4, byte_order);
|
|
|
|
flags_addr = mctx_addr + 12 + 9 * 4;
|
|
read_memory (flags_addr, (gdb_byte *) &eflags, 4);
|
|
eflags |= X86_EFLAGS_T;
|
|
write_memory (flags_addr, (gdb_byte *) &eflags, 4);
|
|
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef BFD64
|
|
static int
|
|
amd64_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
|
|
static const gdb_byte darwin_syscall[] = { 0x0f, 0x05 }; /* syscall */
|
|
gdb_byte buf[sizeof (darwin_syscall)];
|
|
|
|
/* Check if PC is at a sigreturn system call. */
|
|
if (target_read_memory (regs->uts.ts64.__rip, buf, sizeof (buf)) == 0
|
|
&& memcmp (buf, darwin_syscall, sizeof (darwin_syscall)) == 0
|
|
&& (regs->uts.ts64.__rax & 0xffffffff) == 0x20000b8 /* SYS_sigreturn */)
|
|
{
|
|
ULONGEST mctx_addr;
|
|
ULONGEST flags_addr;
|
|
unsigned int rflags;
|
|
|
|
mctx_addr = read_memory_unsigned_integer
|
|
(regs->uts.ts64.__rdi + 48, 8, byte_order);
|
|
flags_addr = mctx_addr + 16 + 17 * 8;
|
|
|
|
/* AMD64 is little endian. */
|
|
read_memory (flags_addr, (gdb_byte *) &rflags, 4);
|
|
rflags |= X86_EFLAGS_T;
|
|
write_memory (flags_addr, (gdb_byte *) &rflags, 4);
|
|
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
darwin_set_sstep (thread_t thread, int enable)
|
|
{
|
|
x86_thread_state_t regs;
|
|
unsigned int count = x86_THREAD_STATE_COUNT;
|
|
kern_return_t kret;
|
|
|
|
kret = thread_get_state (thread, x86_THREAD_STATE,
|
|
(thread_state_t) ®s, &count);
|
|
if (kret != KERN_SUCCESS)
|
|
{
|
|
printf_unfiltered (_("darwin_set_sstep: error %x, thread=%x\n"),
|
|
kret, thread);
|
|
return;
|
|
}
|
|
|
|
switch (regs.tsh.flavor)
|
|
{
|
|
case x86_THREAD_STATE32:
|
|
{
|
|
__uint32_t bit = enable ? X86_EFLAGS_T : 0;
|
|
|
|
if (enable && i386_darwin_sstep_at_sigreturn (®s))
|
|
return;
|
|
if ((regs.uts.ts32.__eflags & X86_EFLAGS_T) == bit)
|
|
return;
|
|
regs.uts.ts32.__eflags
|
|
= (regs.uts.ts32.__eflags & ~X86_EFLAGS_T) | bit;
|
|
kret = thread_set_state (thread, x86_THREAD_STATE,
|
|
(thread_state_t) ®s, count);
|
|
MACH_CHECK_ERROR (kret);
|
|
}
|
|
break;
|
|
#ifdef BFD64
|
|
case x86_THREAD_STATE64:
|
|
{
|
|
__uint64_t bit = enable ? X86_EFLAGS_T : 0;
|
|
|
|
if (enable && amd64_darwin_sstep_at_sigreturn (®s))
|
|
return;
|
|
if ((regs.uts.ts64.__rflags & X86_EFLAGS_T) == bit)
|
|
return;
|
|
regs.uts.ts64.__rflags
|
|
= (regs.uts.ts64.__rflags & ~X86_EFLAGS_T) | bit;
|
|
kret = thread_set_state (thread, x86_THREAD_STATE,
|
|
(thread_state_t) ®s, count);
|
|
MACH_CHECK_ERROR (kret);
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
error (_("darwin_set_sstep: unknown flavour: %d"), regs.tsh.flavor);
|
|
}
|
|
}
|
|
|
|
void
|
|
darwin_complete_target (struct target_ops *target)
|
|
{
|
|
#ifdef BFD64
|
|
amd64_native_gregset64_reg_offset = amd64_darwin_thread_state_reg_offset;
|
|
amd64_native_gregset64_num_regs = amd64_darwin_thread_state_num_regs;
|
|
amd64_native_gregset32_reg_offset = i386_darwin_thread_state_reg_offset;
|
|
amd64_native_gregset32_num_regs = i386_darwin_thread_state_num_regs;
|
|
#endif
|
|
|
|
x86_use_watchpoints (target);
|
|
|
|
x86_dr_low.set_control = i386_darwin_dr_set_control;
|
|
x86_dr_low.set_addr = i386_darwin_dr_set_addr;
|
|
x86_dr_low.get_addr = i386_darwin_dr_get_addr;
|
|
x86_dr_low.get_status = i386_darwin_dr_get_status;
|
|
x86_dr_low.get_control = i386_darwin_dr_get_control;
|
|
|
|
/* Let's assume that the kernel is 64 bits iff the executable is. */
|
|
#ifdef __x86_64__
|
|
x86_set_debug_register_length (8);
|
|
#else
|
|
x86_set_debug_register_length (4);
|
|
#endif
|
|
|
|
target->to_fetch_registers = i386_darwin_fetch_inferior_registers;
|
|
target->to_store_registers = i386_darwin_store_inferior_registers;
|
|
}
|