0b1afbb37b
While writing the previous patch, I noticed that we're not consistent with the (C) in the copyright header. The maintainers manual prefers having it, though also says it's optional. We have over 10x more files with (C) than without in gdb's code, so I spent a few minutes grepping and fixing. Funny enough, the testsuite has it backwards. I'll leave that for another time. gdb/ 2013-02-12 Pedro Alves <palves@redhat.com> * amd64-darwin-tdep.c: Add (C) after Copyright. * cli/cli-cmds.h: Ditto. * cli/cli-decode.c: Ditto. * cli/cli-decode.h: Ditto. * cli/cli-dump.c: Ditto. * cli/cli-dump.h: Ditto. * cli/cli-interp.c: Ditto. * cli/cli-logging.c: Ditto. * cli/cli-script.c: Ditto. * cli/cli-script.h: Ditto. * cli/cli-setshow.c: Ditto. * cli/cli-setshow.h: Ditto. * cli/cli-utils.c: Ditto. * cli/cli-utils.h: Ditto. * config/alpha/nm-osf3.h: Ditto. * config/djgpp/djconfig.sh: Ditto. * config/i386/nm-fbsd.h: Ditto. * config/i386/nm-i386gnu.h: Ditto. * config/nm-linux.h: Ditto. * config/nm-nto.h: Ditto. * config/rs6000/nm-rs6000.h: Ditto. * config/sparc/nm-sol2.h: Ditto. * darwin-nat-info.c: Ditto. * dfp.c: Ditto. * dfp.h: Ditto. * gdb-demangle.h: Ditto. * i386-darwin-nat.c: Ditto. * i386-darwin-tdep.c: Ditto. * linux-fork.h: Ditto. * m32c-tdep.c: Ditto. * microblaze-linux-tdep.c: Ditto. * microblaze-rom.c: Ditto. * microblaze-tdep.c: Ditto. * microblaze-tdep.h: Ditto. * mips-linux-tdep.h: Ditto. * ppc-ravenscar-thread.c: Ditto. * ppc-ravenscar-thread.h: Ditto. * prologue-value.c: Ditto. * prologue-value.h: Ditto. * ravenscar-thread.c: Ditto. * ravenscar-thread.h: Ditto. * sparc-ravenscar-thread.c: Ditto. * sparc-ravenscar-thread.h: Ditto. * tilegx-linux-tdep.c: Ditto. * unwind_stop_reasons.def: Ditto. * windows-nat.h: Ditto. * xtensa-linux-tdep.c: Ditto. * xtensa-xtregs.c: Ditto. * regformats/regdat.sh: Ditto. * regformats/regdef.h: Ditto. gdb/gdbserver/ 2013-02-12 Pedro Alves <palves@redhat.com> * linux-xtensa-low.c: Ditto. * xtensa-xtregs.c: Ditto.
589 lines
17 KiB
C
589 lines
17 KiB
C
/* Darwin support for GDB, the GNU debugger.
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Copyright (C) 1997-2013 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 "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 "i386-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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#ifdef HW_WATCHPOINT_NOT_YET_ENABLED
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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, 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 "
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"thread 0x%x via thread_get_state\n"),
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(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 "
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"thread 0x%x via thread_get_state\n"),
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(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 "
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"thread 0x%x via thread_get_state\n"),
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(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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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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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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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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#endif
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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,
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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 (target_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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/* Returning from a signal trampoline is done by calling a
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special system call (sigreturn). This system call
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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
|
|
|
|
target->to_fetch_registers = i386_darwin_fetch_inferior_registers;
|
|
target->to_store_registers = i386_darwin_store_inferior_registers;
|
|
}
|