/* Target-dependent code for FreeBSD/amd64.
- Copyright (C) 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2003-2015 Free Software Foundation, Inc.
This file is part of GDB.
#include "gdbcore.h"
#include "regcache.h"
#include "osabi.h"
-
-#include "gdb_assert.h"
-#include "gdb_string.h"
+#include "regset.h"
+#include "i386fbsd-tdep.h"
+#include "x86-xstate.h"
#include "amd64-tdep.h"
#include "bsd-uthread.h"
+#include "fbsd-tdep.h"
#include "solib-svr4.h"
/* Support for signal handlers. */
-/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
- routine, return the address of the associated sigcontext structure. */
+/* Return whether THIS_FRAME corresponds to a FreeBSD sigtramp
+ routine. */
+
+static const gdb_byte amd64fbsd_sigtramp_code[] =
+{
+ 0x48, 0x8d, 0x7c, 0x24, 0x10, /* lea SIGF_UC(%rsp),%rdi */
+ 0x6a, 0x00, /* pushq $0 */
+ 0x48, 0xc7, 0xc0, 0xa1, 0x01, 0x00, 0x00,
+ /* movq $SYS_sigreturn,%rax */
+ 0x0f, 0x05 /* syscall */
+};
+
+static int
+amd64fbsd_sigtramp_p (struct frame_info *this_frame)
+{
+ CORE_ADDR pc = get_frame_pc (this_frame);
+ gdb_byte buf[sizeof amd64fbsd_sigtramp_code];
+
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, sizeof buf))
+ return 0;
+ if (memcmp (buf, amd64fbsd_sigtramp_code, sizeof amd64fbsd_sigtramp_code)
+ != 0)
+ return 0;
+
+ return 1;
+}
+
+/* Assuming THIS_FRAME is for a BSD sigtramp routine, return the
+ address of the associated sigcontext structure. */
static CORE_ADDR
-amd64fbsd_sigcontext_addr (struct frame_info *next_frame)
+amd64fbsd_sigcontext_addr (struct frame_info *this_frame)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR sp;
+ gdb_byte buf[8];
/* The `struct sigcontext' (which really is an `ucontext_t' on
FreeBSD/amd64) lives at a fixed offset in the signal frame. See
<machine/sigframe.h>. */
- sp = frame_unwind_register_unsigned (next_frame, AMD64_RSP_REGNUM);
+ get_frame_register (this_frame, AMD64_RSP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 8, byte_order);
return sp + 16;
}
\f
8 * 8, /* %rdi */
10 * 8, /* %rbp */
20 * 8, /* %rsp */
- 7 * 8, /* %r8 ... */
+ 7 * 8, /* %r8 ... */
6 * 8,
5 * 8,
4 * 8,
};
/* Location of the signal trampoline. */
-CORE_ADDR amd64fbsd_sigtramp_start_addr = 0x7fffffffffc0;
-CORE_ADDR amd64fbsd_sigtramp_end_addr = 0x7fffffffffe0;
+CORE_ADDR amd64fbsd_sigtramp_start_addr;
+CORE_ADDR amd64fbsd_sigtramp_end_addr;
/* From <machine/signal.h>. */
int amd64fbsd_sc_reg_offset[] =
24 + 0 * 8, /* %rdi */
24 + 8 * 8, /* %rbp */
24 + 22 * 8, /* %rsp */
- 24 + 4 * 8, /* %r8 ... */
+ 24 + 4 * 8, /* %r8 ... */
24 + 5 * 8,
24 + 9 * 8,
24 + 10 * 8,
-1, /* %rdi */
3 * 8, /* %rbp */
2 * 8, /* %rsp */
- -1, /* %r8 ... */
+ -1, /* %r8 ... */
-1,
-1,
-1, /* ... %r11 */
- 4 * 8, /* %r12 ... */
+ 4 * 8, /* %r12 ... */
5 * 8,
6 * 8,
7 * 8, /* ... %r15 */
0 * 8 /* %rip */
};
+/* Implement the core_read_description gdbarch method. */
+
+static const struct target_desc *
+amd64fbsd_core_read_description (struct gdbarch *gdbarch,
+ struct target_ops *target,
+ bfd *abfd)
+{
+ return amd64_target_description (i386fbsd_core_read_xcr0 (abfd));
+}
+
+/* Similar to amd64_supply_fpregset, but use XSAVE extended state. */
+
+static void
+amd64fbsd_supply_xstateregset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *xstateregs, size_t len)
+{
+ amd64_supply_xsave (regcache, regnum, xstateregs);
+}
+
+/* Similar to amd64_collect_fpregset, but use XSAVE extended state. */
+
+static void
+amd64fbsd_collect_xstateregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *xstateregs, size_t len)
+{
+ amd64_collect_xsave (regcache, regnum, xstateregs, 1);
+}
+
+static const struct regset amd64fbsd_xstateregset =
+ {
+ NULL,
+ amd64fbsd_supply_xstateregset,
+ amd64fbsd_collect_xstateregset
+ };
+
+/* Iterate over core file register note sections. */
+
+static void
+amd64fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ cb (".reg", tdep->sizeof_gregset, &i386_gregset, NULL, cb_data);
+ cb (".reg2", tdep->sizeof_fpregset, &amd64_fpregset, NULL, cb_data);
+ cb (".reg-xstate", X86_XSTATE_SIZE(tdep->xcr0),
+ &amd64fbsd_xstateregset, "XSAVE extended state", cb_data);
+}
+
static void
amd64fbsd_supply_uthread (struct regcache *regcache,
int regnum, CORE_ADDR addr)
}
}
-void
+static void
amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ /* Generic FreeBSD support. */
+ fbsd_init_abi (info, gdbarch);
+
/* Obviously FreeBSD is BSD-based. */
i386bsd_init_abi (info, gdbarch);
amd64_init_abi (info, gdbarch);
+ tdep->sigtramp_p = amd64fbsd_sigtramp_p;
tdep->sigtramp_start = amd64fbsd_sigtramp_start_addr;
tdep->sigtramp_end = amd64fbsd_sigtramp_end_addr;
tdep->sigcontext_addr = amd64fbsd_sigcontext_addr;
tdep->sc_reg_offset = amd64fbsd_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (amd64fbsd_sc_reg_offset);
+ tdep->xsave_xcr0_offset = I386_FBSD_XSAVE_XCR0_OFFSET;
+
+ /* Iterate over core file register note sections. */
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, amd64fbsd_iterate_over_regset_sections);
+
+ set_gdbarch_core_read_description (gdbarch,
+ amd64fbsd_core_read_description);
+
/* FreeBSD provides a user-level threads implementation. */
bsd_uthread_set_supply_uthread (gdbarch, amd64fbsd_supply_uthread);
bsd_uthread_set_collect_uthread (gdbarch, amd64fbsd_collect_uthread);