/* Native-dependent code for FreeBSD/i386.
- Copyright 2001, 2002 Free Software Foundation, Inc.
+
+ Copyright (C) 2001-2014 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
#include "regcache.h"
+#include "target.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <sys/sysctl.h>
-/* Prevent warning from -Wmissing-prototypes. */
-void _initialize_i386fbsd_nat (void);
+#include "fbsd-nat.h"
+#include "i386-tdep.h"
+#include "x86-nat.h"
+#include "i386bsd-nat.h"
-/* Resume execution of the inferior process.
- If STEP is nonzero, single-step it.
- If SIGNAL is nonzero, give it that signal. */
+/* Resume execution of the inferior process. If STEP is nonzero,
+ single-step it. If SIGNAL is nonzero, give it that signal. */
-void
-child_resume (ptid_t ptid, int step, enum target_signal signal)
+static void
+i386fbsd_resume (struct target_ops *ops,
+ ptid_t ptid, int step, enum gdb_signal signal)
{
pid_t pid = ptid_get_pid (ptid);
int request = PT_STEP;
if (!step)
{
- unsigned int eflags;
+ struct regcache *regcache = get_current_regcache ();
+ ULONGEST eflags;
/* Workaround for a bug in FreeBSD. Make sure that the trace
flag is off when doing a continue. There is a code path
never goes through the kernel's trap() function which would
normally clear it. */
- eflags = read_register (PS_REGNUM);
+ regcache_cooked_read_unsigned (regcache, I386_EFLAGS_REGNUM,
+ &eflags);
if (eflags & 0x0100)
- write_register (PS_REGNUM, eflags & ~0x0100);
+ regcache_cooked_write_unsigned (regcache, I386_EFLAGS_REGNUM,
+ eflags & ~0x0100);
request = PT_CONTINUE;
}
was. (If GDB wanted it to start some other way, we have already
written a new PC value to the child.) */
if (ptrace (request, pid, (caddr_t) 1,
- target_signal_to_host (signal)) == -1)
- perror_with_name ("ptrace");
+ gdb_signal_to_host (signal)) == -1)
+ perror_with_name (("ptrace"));
}
\f
+
+/* Support for debugging kernel virtual memory images. */
+
+#include <machine/pcb.h>
+
+#include "bsd-kvm.h"
+
+static int
+i386fbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+ /* The following is true for FreeBSD 4.7:
+
+ The pcb contains %eip, %ebx, %esp, %ebp, %esi, %edi and %gs.
+ This accounts for all callee-saved registers specified by the
+ psABI and then some. Here %esp contains the stack pointer at the
+ point just after the call to cpu_switch(). From this information
+ we reconstruct the register state as it would look when we just
+ returned from cpu_switch(). */
+
+ /* The stack pointer shouldn't be zero. */
+ if (pcb->pcb_esp == 0)
+ return 0;
+
+ pcb->pcb_esp += 4;
+ regcache_raw_supply (regcache, I386_EDI_REGNUM, &pcb->pcb_edi);
+ regcache_raw_supply (regcache, I386_ESI_REGNUM, &pcb->pcb_esi);
+ regcache_raw_supply (regcache, I386_EBP_REGNUM, &pcb->pcb_ebp);
+ regcache_raw_supply (regcache, I386_ESP_REGNUM, &pcb->pcb_esp);
+ regcache_raw_supply (regcache, I386_EBX_REGNUM, &pcb->pcb_ebx);
+ regcache_raw_supply (regcache, I386_EIP_REGNUM, &pcb->pcb_eip);
+ regcache_raw_supply (regcache, I386_GS_REGNUM, &pcb->pcb_gs);
+
+ return 1;
+}
+\f
+
+/* Prevent warning from -Wmissing-prototypes. */
+void _initialize_i386fbsd_nat (void);
+
void
_initialize_i386fbsd_nat (void)
{
+ struct target_ops *t;
+
+ /* Add some extra features to the common *BSD/i386 target. */
+ t = i386bsd_target ();
+
+#ifdef HAVE_PT_GETDBREGS
+
+ x86_use_watchpoints (t);
+
+ x86_dr_low.set_control = i386bsd_dr_set_control;
+ x86_dr_low.set_addr = i386bsd_dr_set_addr;
+ x86_dr_low.get_addr = i386bsd_dr_get_addr;
+ x86_dr_low.get_status = i386bsd_dr_get_status;
+ x86_dr_low.get_control = i386bsd_dr_get_control;
+ x86_set_debug_register_length (4);
+
+#endif /* HAVE_PT_GETDBREGS */
+
+
+ t->to_resume = i386fbsd_resume;
+ t->to_pid_to_exec_file = fbsd_pid_to_exec_file;
+ t->to_find_memory_regions = fbsd_find_memory_regions;
+ add_target (t);
+
+ /* Support debugging kernel virtual memory images. */
+ bsd_kvm_add_target (i386fbsd_supply_pcb);
+
/* FreeBSD provides a kern.ps_strings sysctl that we can use to
locate the sigtramp. That way we can still recognize a sigtramp
if its location is changed in a new kernel. Of course this is
#ifdef KERN_PS_STRINGS
{
int mib[2];
- int ps_strings;
+ u_long ps_strings;
size_t len;
- extern CORE_ADDR i386fbsd_sigtramp_start;
- extern CORE_ADDR i386fbsd_sigtramp_end;
-
mib[0] = CTL_KERN;
mib[1] = KERN_PS_STRINGS;
len = sizeof (ps_strings);
if (sysctl (mib, 2, &ps_strings, &len, NULL, 0) == 0)
{
- i386fbsd_sigtramp_start = ps_strings - 128;
- i386fbsd_sigtramp_end = ps_strings;
+ i386fbsd_sigtramp_start_addr = ps_strings - 128;
+ i386fbsd_sigtramp_end_addr = ps_strings;
}
}
#endif
projects / platform / upstream / binutils.git / blobdiff