/* Darwin support for GDB, the GNU debugger.
- Copyright 1997-2002, 2008-2012 Free Software Foundation, Inc.
+ Copyright (C) 1997-2020 Free Software Foundation, Inc.
Contributed by Apple Computer, Inc.
#include "objfiles.h"
#include "gdbcmd.h"
#include "regcache.h"
-#include "gdb_assert.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
#include "gdbarch.h"
#include "arch-utils.h"
#include "gdbcore.h"
-#include "i386-nat.h"
+#include "x86-nat.h"
#include "darwin-nat.h"
#include "i386-darwin-tdep.h"
#include "amd64-darwin-tdep.h"
#endif
+struct i386_darwin_nat_target final : public x86_nat_target<darwin_nat_target>
+{
+ /* Add our register access methods. */
+ void fetch_registers (struct regcache *, int) override;
+ void store_registers (struct regcache *, int) override;
+};
+
+static struct i386_darwin_nat_target darwin_target;
+
/* Read register values from the inferior process.
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
-static void
-i386_darwin_fetch_inferior_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+
+void
+i386_darwin_nat_target::fetch_registers (struct regcache *regcache, int regno)
{
- thread_t current_thread = ptid_get_tid (inferior_ptid);
+ thread_t current_thread = regcache->ptid ().tid ();
int fetched = 0;
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
#ifdef BFD64
if (gdbarch_ptr_bit (gdbarch) == 64)
{
printf_unfiltered (_("Error calling thread_get_state for "
"GP registers for thread 0x%lx\n"),
- current_thread);
+ (unsigned long) current_thread);
MACH_CHECK_ERROR (ret);
}
+
+ /* Some kernels don't sanitize the values. */
+ gp_regs.uts.ts64.__fs &= 0xffff;
+ gp_regs.uts.ts64.__gs &= 0xffff;
+
amd64_supply_native_gregset (regcache, &gp_regs.uts, -1);
fetched++;
}
{
printf_unfiltered (_("Error calling thread_get_state for "
"float registers for thread 0x%lx\n"),
- current_thread);
+ (unsigned long) current_thread);
MACH_CHECK_ERROR (ret);
}
amd64_supply_fxsave (regcache, -1, &fp_regs.ufs.fs64.__fpu_fcw);
MACH_CHECK_ERROR (ret);
}
for (i = 0; i < I386_NUM_GREGS; i++)
- regcache_raw_supply
- (regcache, i,
- (char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);
+ regcache->raw_supply
+ (i, (char *) &gp_regs + i386_darwin_thread_state_reg_offset[i]);
fetched++;
}
if (! fetched)
{
warning (_("unknown register %d"), regno);
- regcache_raw_supply (regcache, regno, NULL);
+ regcache->raw_supply (regno, NULL);
}
}
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
-static void
-i386_darwin_store_inferior_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+void
+i386_darwin_nat_target::store_registers (struct regcache *regcache,
+ int regno)
{
- thread_t current_thread = ptid_get_tid (inferior_ptid);
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ thread_t current_thread = regcache->ptid ().tid ();
+ struct gdbarch *gdbarch = regcache->arch ();
#ifdef BFD64
if (gdbarch_ptr_bit (gdbarch) == 64)
amd64_collect_native_gregset (regcache, &gp_regs.uts, regno);
+ /* Some kernels don't sanitize the values. */
+ gp_regs.uts.ts64.__fs &= 0xffff;
+ gp_regs.uts.ts64.__gs &= 0xffff;
+
ret = thread_set_state (current_thread, x86_THREAD_STATE,
(thread_state_t) &gp_regs,
x86_THREAD_STATE_COUNT);
for (i = 0; i < I386_NUM_GREGS; i++)
if (regno == -1 || regno == i)
- regcache_raw_collect
- (regcache, i,
- (char *)&gp_regs + i386_darwin_thread_state_reg_offset[i]);
+ regcache->raw_collect
+ (i, (char *) &gp_regs + i386_darwin_thread_state_reg_offset[i]);
ret = thread_set_state (current_thread, x86_THREAD_STATE32,
(thread_state_t) &gp_regs,
}
}
-#ifdef HW_WATCHPOINT_NOT_YET_ENABLED
/* Support for debug registers, boosted mostly from i386-linux-nat.c. */
static void
-i386_darwin_dr_set (int regnum, uint32_t value)
+i386_darwin_dr_set (int regnum, CORE_ADDR value)
{
- int current_pid;
thread_t current_thread;
x86_debug_state_t dr_regs;
kern_return_t ret;
- unsigned int dr_count = x86_DEBUG_STATE_COUNT;
+ unsigned int dr_count;
gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);
- current_thread = ptid_get_tid (inferior_ptid);
+ current_thread = inferior_ptid.tid ();
- dr_regs.dsh.flavor = x86_DEBUG_STATE32;
- dr_regs.dsh.count = x86_DEBUG_STATE32_COUNT;
+ dr_regs.dsh.flavor = x86_DEBUG_STATE;
+ dr_regs.dsh.count = x86_DEBUG_STATE_COUNT;
dr_count = x86_DEBUG_STATE_COUNT;
- ret = thread_get_state (current_thread, x86_DEBUG_STATE,
+ ret = thread_get_state (current_thread, x86_DEBUG_STATE,
(thread_state_t) &dr_regs, &dr_count);
+ MACH_CHECK_ERROR (ret);
- if (ret != KERN_SUCCESS)
- {
- printf_unfiltered (_("Error reading debug registers "
- "thread 0x%x via thread_get_state\n"),
- (int) current_thread);
- MACH_CHECK_ERROR (ret);
- }
-
- switch (regnum)
+ switch (dr_regs.dsh.flavor)
{
- case 0:
- dr_regs.uds.ds32.__dr0 = value;
- break;
- case 1:
- dr_regs.uds.ds32.__dr1 = value;
- break;
- case 2:
- dr_regs.uds.ds32.__dr2 = value;
- break;
- case 3:
- dr_regs.uds.ds32.__dr3 = value;
- break;
- case 4:
- dr_regs.uds.ds32.__dr4 = value;
- break;
- case 5:
- dr_regs.uds.ds32.__dr5 = value;
- break;
- case 6:
- dr_regs.uds.ds32.__dr6 = value;
- break;
- case 7:
- dr_regs.uds.ds32.__dr7 = value;
- break;
+ case x86_DEBUG_STATE32:
+ switch (regnum)
+ {
+ case 0:
+ dr_regs.uds.ds32.__dr0 = value;
+ break;
+ case 1:
+ dr_regs.uds.ds32.__dr1 = value;
+ break;
+ case 2:
+ dr_regs.uds.ds32.__dr2 = value;
+ break;
+ case 3:
+ dr_regs.uds.ds32.__dr3 = value;
+ break;
+ case 4:
+ dr_regs.uds.ds32.__dr4 = value;
+ break;
+ case 5:
+ dr_regs.uds.ds32.__dr5 = value;
+ break;
+ case 6:
+ dr_regs.uds.ds32.__dr6 = value;
+ break;
+ case 7:
+ dr_regs.uds.ds32.__dr7 = value;
+ break;
+ }
+ break;
+#ifdef BFD64
+ case x86_DEBUG_STATE64:
+ switch (regnum)
+ {
+ case 0:
+ dr_regs.uds.ds64.__dr0 = value;
+ break;
+ case 1:
+ dr_regs.uds.ds64.__dr1 = value;
+ break;
+ case 2:
+ dr_regs.uds.ds64.__dr2 = value;
+ break;
+ case 3:
+ dr_regs.uds.ds64.__dr3 = value;
+ break;
+ case 4:
+ dr_regs.uds.ds64.__dr4 = value;
+ break;
+ case 5:
+ dr_regs.uds.ds64.__dr5 = value;
+ break;
+ case 6:
+ dr_regs.uds.ds64.__dr6 = value;
+ break;
+ case 7:
+ dr_regs.uds.ds64.__dr7 = value;
+ break;
+ }
+ break;
+#endif
}
- ret = thread_set_state (current_thread, x86_DEBUG_STATE,
- (thread_state_t) &dr_regs, dr_count);
+ ret = thread_set_state (current_thread, dr_regs.dsh.flavor,
+ (thread_state_t) &dr_regs.uds, dr_count);
- if (ret != KERN_SUCCESS)
- {
- printf_unfiltered (_("Error writing debug registers "
- "thread 0x%x via thread_get_state\n"),
- (int) current_thread);
- MACH_CHECK_ERROR (ret);
- }
+ MACH_CHECK_ERROR (ret);
}
-static uint32_t
+static CORE_ADDR
i386_darwin_dr_get (int regnum)
{
thread_t current_thread;
x86_debug_state_t dr_regs;
kern_return_t ret;
- unsigned int dr_count = x86_DEBUG_STATE_COUNT;
+ unsigned int dr_count;
gdb_assert (regnum >= 0 && regnum <= DR_CONTROL);
- current_thread = ptid_get_tid (inferior_ptid);
+ current_thread = inferior_ptid.tid ();
- dr_regs.dsh.flavor = x86_DEBUG_STATE32;
- dr_regs.dsh.count = x86_DEBUG_STATE32_COUNT;
+ dr_regs.dsh.flavor = x86_DEBUG_STATE;
+ dr_regs.dsh.count = x86_DEBUG_STATE_COUNT;
dr_count = x86_DEBUG_STATE_COUNT;
- ret = thread_get_state (current_thread, x86_DEBUG_STATE,
+ ret = thread_get_state (current_thread, x86_DEBUG_STATE,
(thread_state_t) &dr_regs, &dr_count);
+ MACH_CHECK_ERROR (ret);
- if (ret != KERN_SUCCESS)
- {
- printf_unfiltered (_("Error reading debug registers "
- "thread 0x%x via thread_get_state\n"),
- (int) current_thread);
- MACH_CHECK_ERROR (ret);
- }
-
- switch (regnum)
+ switch (dr_regs.dsh.flavor)
{
- case 0:
- return dr_regs.uds.ds32.__dr0;
- case 1:
- return dr_regs.uds.ds32.__dr1;
- case 2:
- return dr_regs.uds.ds32.__dr2;
- case 3:
- return dr_regs.uds.ds32.__dr3;
- case 4:
- return dr_regs.uds.ds32.__dr4;
- case 5:
- return dr_regs.uds.ds32.__dr5;
- case 6:
- return dr_regs.uds.ds32.__dr6;
- case 7:
- return dr_regs.uds.ds32.__dr7;
- default:
- return -1;
+ case x86_DEBUG_STATE32:
+ switch (regnum)
+ {
+ case 0:
+ return dr_regs.uds.ds32.__dr0;
+ case 1:
+ return dr_regs.uds.ds32.__dr1;
+ case 2:
+ return dr_regs.uds.ds32.__dr2;
+ case 3:
+ return dr_regs.uds.ds32.__dr3;
+ case 4:
+ return dr_regs.uds.ds32.__dr4;
+ case 5:
+ return dr_regs.uds.ds32.__dr5;
+ case 6:
+ return dr_regs.uds.ds32.__dr6;
+ case 7:
+ return dr_regs.uds.ds32.__dr7;
+ default:
+ return -1;
+ }
+ break;
+#ifdef BFD64
+ case x86_DEBUG_STATE64:
+ switch (regnum)
+ {
+ case 0:
+ return dr_regs.uds.ds64.__dr0;
+ case 1:
+ return dr_regs.uds.ds64.__dr1;
+ case 2:
+ return dr_regs.uds.ds64.__dr2;
+ case 3:
+ return dr_regs.uds.ds64.__dr3;
+ case 4:
+ return dr_regs.uds.ds64.__dr4;
+ case 5:
+ return dr_regs.uds.ds64.__dr5;
+ case 6:
+ return dr_regs.uds.ds64.__dr6;
+ case 7:
+ return dr_regs.uds.ds64.__dr7;
+ default:
+ return -1;
+ }
+ break;
+#endif
+ default:
+ return -1;
}
}
-void
+static void
i386_darwin_dr_set_control (unsigned long control)
{
i386_darwin_dr_set (DR_CONTROL, control);
}
-void
+static void
i386_darwin_dr_set_addr (int regnum, CORE_ADDR addr)
{
gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
i386_darwin_dr_set (DR_FIRSTADDR + regnum, addr);
}
-CORE_ADDR
+static CORE_ADDR
i386_darwin_dr_get_addr (int regnum)
{
return i386_darwin_dr_get (regnum);
}
-unsigned long
+static unsigned long
i386_darwin_dr_get_status (void)
{
return i386_darwin_dr_get (DR_STATUS);
}
-unsigned long
+static unsigned long
i386_darwin_dr_get_control (void)
{
return i386_darwin_dr_get (DR_CONTROL);
}
-#endif
void
darwin_check_osabi (darwin_inferior *inf, thread_t thread)
{
- if (gdbarch_osabi (target_gdbarch) == GDB_OSABI_UNKNOWN)
+ if (gdbarch_osabi (target_gdbarch ()) == GDB_OSABI_UNKNOWN)
{
/* Attaching to a process. Let's figure out what kind it is. */
x86_thread_state_t gp_regs;
gdbarch_info_init (&info);
gdbarch_info_fill (&info);
- info.byte_order = gdbarch_byte_order (target_gdbarch);
+ 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,
+ info.bfd_arch_info = bfd_lookup_arch (bfd_arch_i386,
bfd_mach_i386_i386);
gdbarch_update_p (info);
}
static int
i386_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
{
- enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
+ 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)];
static int
amd64_darwin_sstep_at_sigreturn (x86_thread_state_t *regs)
{
- enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
+ 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)];
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,
+ kret = thread_set_state (thread, x86_THREAD_STATE,
(thread_state_t) ®s, count);
MACH_CHECK_ERROR (kret);
}
return;
regs.uts.ts64.__rflags
= (regs.uts.ts64.__rflags & ~X86_EFLAGS_T) | bit;
- kret = thread_set_state (thread, x86_THREAD_STATE,
+ kret = thread_set_state (thread, x86_THREAD_STATE,
(thread_state_t) ®s, count);
MACH_CHECK_ERROR (kret);
}
}
}
+void _initialize_i386_darwin_nat ();
void
-darwin_complete_target (struct target_ops *target)
+_initialize_i386_darwin_nat ()
{
#ifdef BFD64
amd64_native_gregset64_reg_offset = amd64_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;
+ 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
+
+ add_inf_child_target (&darwin_target);
}
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